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From May 12 to 14, 2026, the 13th Aero Engine & Gas Turbine Focus Conference and Exhibition (GTF 2026) was grandly held at Shanghai World Expo Exhibition & Convention Center. Centering on the theme of "Focus on Industrial Chain Collaboration, Build an Innovative Ecosystem, Seize Opportunities in China", the event built an international high-end thermal spray materials platform for indepth exchanges, collaborative innovation and precise docking across the entire industrial chain of aero engines and gas turbines. The Hardfacing Materials Division of Luoyang Geotools made a splendid appearance with its core series of aviation thermal spray materials at Booth B068, Hall H2. It fully displayed the technical accumulation and innovative achievements of its thermal spray powder in aviation applications, discussing new industrial development opportunities and exploring new paths for technological upgrading together with peers from the industry.   As a dedicated pioneer in China’s hardfacing materials industry, the Hardfacing Materials Division has long focused on high-end equipment sectors including aerospace and gas turbines. It specializes in the research, development, production and application of aviation thermal spray powders(tungsten carbide coating, metal alloy powder and weld materials etc). Supported by strict quality control, advanced preparation technologies and superior product performance, it provides reliable material solutions for the surface coating service of core aircraft landing gear components.At this exhibition, the division mainly displayed products applicable to aero-engines, gas turbines, aircraft landing gears and other fields, fully meeting the stringent requirements of the aviation industry for materials in high temperature resistance, wear resistance, corrosion resistance and high reliability.Numerous visitors stopped by the exhibition area to examine product details and inquire about technical parameters. Several potential clients had in-depth discussions with on-site sales managers on the core ideas of collaborative optimization of materials, processes and performances, winning wide recognition from all attendees.   The exhibition will last until May 14th. Taking this splendid exhibition appearance as a market opportunity, the Thermal Spray Materials Division of Luoyang Geotools will continue to delve into the field of thermal spraying powders in the future. It will focus on industry demands, increase investment in research and development, promote the upgrading of powder products towards refinement, functionalization and high-end orientation, continuously break through core technical bottlenecks, and optimize product performance and service system.We strive to boost the high-quality development of the aero-engine and gas turbine industry, and contribute hardfacing material strength to the independent controllability of domestic high-end equipment.The exciting exhibition is still ongoing. Luoyang Geotools sincerely welcomes all new and old customers. Our booth is located at Booth B068, Hall H2. We look forward to your visit and have a deep talk of tungsten carbide coating used on gas!

As global automakers advance toward carbon neutrality, an overlooked pollution source—brake dust—has emerged.With Euro 7 fully enforced, vehicle exhaust control nears its technical limit. Brake dust contributes 15% of urban PM2.5 per EEA data, becoming a new environmental challenge.The new regulation sets a strict limit of ≤7mg/km, defining industry survival standards and opening a huge blue ocean market. Global players are striving for solutions: to guarantee braking safety while curbing metal dust, balancing performance and eco-friendliness perfectly.   From June 3 to 5, 2026, XTC Luoyang Geotools made a strong appearance at the 2026 ChinaBrake Annual Conference with its full range of brake coating products. Located at Booth 8039, Hall E4, our company provides one-stop thermal spray coating solutions for automotive brake discs, empowering industrial compliance and upgrading with solid core technologies.     Professional Supplier & Manufacturer of Auto Brake Disc Coating Powder: XTC Luoyang Geotools has built intelligent production lines with an annual output of 500 tons of wear-resistant thermal spray coating for automotive brake discs and 1,000 tons of metal alloy powder, enabling efficient delivery of bulk global orders. Its products have passed bench tests by many major European OEMs, boasting industry-leading technical reliability and performance, and fully complying with Euro 7 regulatory requirements. Backed by 30 years of experience in thermal spray materials R&D, supported by a high-caliber talent team and advanced management philosophy, the company focuses on providing low-dust and eco-friendly solutions for the automotive braking industry, helping customers efficiently meet the stringent standards of Euro 7 and upcoming China 7 regulations.     Core Products:   XTC Luoyang's eco-friendly coating solution for brake discs adopts a double-layer structure design. As an environmentally friendly coating material, it complies with EU REACH regulations and aligns with the green development trend of the automotive industry.     GPT30FC-1(TiC-FeCr) •Used as a hard phase reinforcement, it is often combined with matrix materials such as stainless steel powder 430L and 316L to form the surface layer of brake discs, delivering excellent wear resistance, corrosion resistance and thermal stability.• Produced by agglomeration and sintering process with high sphericity, good fluidity and high powder feeding efficiency.• Wide process window for cladding application, crack-free coating with outstanding wear and corrosion resistance.• Environmentally and human-friendly, fully compliant with current and future regulatory requirements including REACH.     GPS430L-4 Stainless Steel Base Powder ● Used as the transition layer and matrix material for hard phases, it can fabricate cladding layers with excellent corrosion resistance;● Manufactured by inert gas atomization process, featuring high sphericity, good fluidity and high powder feeding efficiency;● Offers a wide cladding process window with crack-free performance and superior corrosion resistance;● Eco-friendly and harmless to human health, complying with current and future REACH regulatory requirements.     Its participation in the 2026 ChinaBrake Annual Conference serves as an important platform for Luoyang Jinlu to showcase its technical strength and product advantages, as well as a key opportunity to connect deeply with industry partners and jointly explore the innovation path of braking technology in the Euro 7 era.Going forward, XTC Luoyang Geotools will continue to focus on the field of hardfacing materials. Driven by technological innovation, the company will keep optimizing its coating solutions for automotive brake discs, adhere to the green and eco-friendly philosophy, and support the global automotive braking industry in regulatory compliance upgrading and high-quality development. It will work with industry peers toward a new industrial future under the carbon neutrality goal.We sincerely invite all industry partners to visit Booth 8039, Hall E4, experience our premium products up close, discuss cooperation opportunities, and embark on a new journey together.  

On January 26, XTC Luoyang plant hold 2021 year-ending summary up meeting i.e. 2022 New Year conference sponsored by the administration department. Our hardfacing department and construction tools department, and alloy tools department all intened. We told the thermal spray materials, laser cladding powder and weld materials and  rock drilling tools, coal mining tools and wear and crushing tools. The conference is mainly awarded the outstanding Party members and party workers, advanced team and excellent employees and reviewed the key work reports. At the end of the conference, all attendants focused on annual strategic target to compose a new chapter.

[IPD Topics]We are IPD practitioners--Hardface Division Author:Peng Sun Auditor:Wang Li R&D is not only R&D department, it is the whole staff Market is not only for sales, it is a market for all employees Market-Based Innovation - Demand-Oriented Products can only have vigorous vitality if they fit the market. The six concepts of Xiamen Tungsten IPD system construction require us to fully fit the market, extensively collect market demand, combine the development strategy of the group company, carry out demand planning and management, lead the development of R&D projects, and make R&D projects better for the company. target service. The IPD project is intend to improve our thermal spray materials, tungsten carbide powder, weld materials and other drill bits department products by systematize administration.   R&D is an investment behavior - risk management No organization can achieve 100% correct R&D, but we must continue to improve the success rate of R&D projects. Huawei's R&D investment in 2021 is 142.7 billion yuan. This money is to invest to achieve greater value in the future, not to waste water. As a state-owned enterprise, we must not allow the loss of state-owned assets, but must implement fine management to ensure that our R&D investment is valuable and rewarding. Cross-departmental collaboration - seamless cooperation Department walls are often seen in daily work, and it is a roadblock that hinders work efficiency. And an efficient and united cross-departmental team, it will become a benchmark, reduce unnecessary communication and waiting, and make things go smoothly through unity and cooperation. Platform Development and Reuse Strategy--BKMC The establishment of foundations and the rapid replication and application of mature technologies will help reduce the cost of technology development and make it easier to systematically build product planning businesses. It is also critical to shortening product development cycles, allowing us to respond more quickly and efficiently to customer needs. Relative separation of technology development and product development - asynchronous strategy Technology development transforms immature and unsolved technologies into mature technologies; product development is to apply mature technologies from the shelf as much as possible according to market demand, and meet customer requirements accurately, quickly and at low cost. Technology development pays attention to innovation, and product development focuses on the rapid withdrawal of value. Structured parallelism - going hand in hand The IPD process system is a pyramid structure, and you can get an overview and appreciate every detail. Overall, it is not a sequential logic and can be parallelized. Multi-dimensional work is carried out at the same time, which is more conducive to improving time efficiency.   IPD is an inter-departmental R&D system, rather than the previous R&D department working alone, which is a serious challenge for all companies. It focuses on efficient return on investment and is the only way to win in R&D. The construction of the IPD system presents us with a new challenge. It is a revolution that has swept through all departments of the company. If we want to do a good job in this change, we first need to have a clear goal and unity, and the leadership team must provide adequate support. This is a tough battle, and hard-faced materials have taken the first step in this regard. During the 14th Five-Year Plan period (2021-2025), the Hard Surface Materials Division will carry out the construction of the IPD system in strict accordance with the guidelines for the construction of the Group's IPD system and in light of the specific conditions of the division. At present, we are only at the 2.0 level (excellent functions). Next, we will focus on building an efficient cross-departmental team, do a good job in project management, and achieve the 3.0 level (excellent projects).   The construction of the IPD system is not achieved overnight. On the contrary, it is an arduous process. At this time, we need practitioners to stand up, practice, and effectively plan, organize, and take the lead, so that IPD ideas can be effectively integrated into the hearts of the majority of employees. I believe that through our continuous efforts, the IPD system will be able to shine in Xiamen Tungsten, do a good job of serving the business, and achieve the five-year business goal.

Since the generalization of IAM (international advanced manufacturing) in XTC group, the hard facing materials BU in Luoyang plant is adhering to the policy of "chasing quality thermal spray materials products with quality work". Combining with lean production, the BU is committing to create IAM production line. Through IAM, we can made this hard-facing materials production line more precise and provide more professional coating service. There is a saying about the art of war: food and fodder should go ahead of troops and horses. Therefore the first is to equip the staff with the thinking of lean production, we are focusing on talent cultivation and getting a Six Sigma Green Belt certification and seven junior Lean master certifications. To control product quality, including process quality improvement and customer complaint improvement by using TQM(Total Quality Management) to ensure the process and final product quality. To improve the stability of the process quality effectively by DMAIC (Define, Measure, Analyze, Improve, Control), DOE (Design of experiment) and SPC (Statistical Process Control). For instance, the range difference of WC-10CO-4Cr  tungsten carbide powder is lower within 0.3. Meanwhile, we are establishing a quick feedback channel to ensure timely and effectively handle complains to lower it to 1.7%. Site improvement is well-regulated by carrying out the 5S and TPM. The application of IE seven techniques greatly reduces artificial errors and improve the efficiency. Among which, the producing lead time of thermal spraying powder is reduced to 10.8 days, which vastly meets the demand of orders.   Lean production is persistent and the innovation is endless. We believe that we can win the customers` favor with quality service and quality products, we will take customer satisfaction as the purpose to keep improving.  

A good news said that our thermal spray powder (Fe-based metal alloy) got the praise from the end user regarding the quality and conforrmity. Meanwhile,the thermal spray coating performances are beyond the expectation. the customer is quite happy with it.   Luoyang Golden Egret Geotools is specilized in powder manufacturing. The main products are Thermal spray powder (WC-based/CrC-based), metal alloy powder, weld materials and cast tungsten carbide.  

From March 18th to 20th, 2026, the International Thermal Spraying Conference and Exhibition (ITSC), which has attracted much attention from the global thermal spray materials industry, grandly opened in Bangkok, Thailand. This exhibition was held at the Bangkok International Trade Exhibition Center, gathering 208 industry-leading enterprises, research institutions and professionals from all over the world. The exhibition area reached 12,000 square meters, attracting over 10,000 visitors to attend and engage in exchanges and negotiations. It has become a core platform for showcasing global thermal spraying technological innovation achievements, connecting industry resources and jointly exploring development opportunities. XTC Luoyang showcased its Thermal Spray Powder, Welding Material, Laser Cladding Powder product series, innovative technologies and overall solutions. The booth number was 207. Share with you the wonderful moments of the exhibition! XTC Luoyang leveraged its core strengths and focused on showcasing its entire range of thermal spray powder, metal alloy powder, wear-resistant weld materials, and various new products. It also presented customized hard surface solutions tailored for multiple fields such as aerospace, gas turbines, new energy, steel and petrochemical industries. At this event, the technical team of Luoyang Jinlu engaged in in-depth exchanges with global peers and end-users, discussing the cutting-edge trends of thermal spraying technology and sharing experiences on topics such as optimizing coating processes and addressing industry pain points.  XTC Luoyang will take this exhibition as an opportunity to continuously deepen technological innovation in hard surface materials, optimize product structure, enhance product core competitiveness, and strengthen cooperation and exchanges with global industry partners. It will actively integrate into the global thermal spraying industry ecosystem, promote the international development of hard surface materials technology, open a new chapter of international development, and contribute Chinese strength to the high-quality development of the global thermal spraying industry!  

Exhibition Name: Thailand Bangkok International Thermal Spraying Conference ITSC 2026 Exhibition Date: March 18th - March 20th (18th March - 20th March, 2026)Booth Number: 207 (Booth No: 207)Exhibition Venue: Queen Sirikit National Convention Center, 60 Ratchadaphisek Road, Klongtoey, Bangkok, Thailand (Thailand Bangkok International Trade Convention Center) Luoyang Golden Egret Geotools will show our Thermal Spray Powder, Welding Material, Laser Cladding Powder, eagerly awaiting your visit!

  High-hardness Wear Resistant Welding Wires for Shield Cutter Performance Analysis   Cutter head of shield tunneling machine is divided into two layout forms as soft soil and hard rock according to different geological conditions. The cutter head layout of soft soil is serrated knife as basic, edge hob and scraper as auxiliary. Cutter head layer of hard rock is hob as basic and scraper as auxiliary. Cutter is an initial part of shield tunneling machine, reasonable selection, application, maintenance and replacement directly determines the quality, progress and cost of shield tunneling project. Damage forms of shield cutter mainly are furrow type abrasive wear, rolling wear, collapse and impact failure. It is necessary to use wear resistant spray wires to strengthen the wearable parts of shield cutter.   Introduction of Welding Wires Moly Titanium Vanadium intensified composite Chromium carbide wear resistant flux cored welding wire improves bonding strength and tenacity, could be welded to multiple layers, and won`t peel off or fall off, maintains good abrasion resistance under certain impact working condition.    Product Grade Diameter (mm) Hardness (HRC) G65 (g) B611 (g) Welding Process Weight GSQD671Mo-4 D1.6 63-68 0.040±0.005 0.870±0.005 Carbon-dioxide arc welding 15 kg/Spool   Chemical Composition(%) Fe C Cr Mn Si B Mo Ti V Bal. 3.8-4.2 19.0-22.0 0.8-1.5 0.6-0.9 1.2-1.7 1.4-1.8 0.5-0.8 0.1-0.3   Welding Parameters   Electricity Voltage Current Type Shield Airflow Gas Flow Welding Torch Angle Wire Extension Welding Speed 220-280A 22-28V DCEP Pure Carbon Dioxide 20L/min 80° 15-20mm 35cm/min   Welcome contact us anytime if you are interested in this product and any other welding wires like Stainless Steel Welding Wire. All the best! Luoyang Golden Egret Geotools Co., Ltd

Thermal spraying technology is a mature surface strengthening and protection technology and an important part of surface modification. With the development of science and technology, thermal spraying technology to improve the abrasion, corrosion, cavitation resistance of turbine blade in hydropower industry has obtained the good effect and popularization. For the operation condition of the existence both sediment erosion and erosion, surface strengthening is one of the best method to achieve high wear-resisting, anti-corrosion, cavitation resistance, and reduce the coating service costs. 01-The thermal spray powder sprayed on the turbine are mainly WC/10Co/4Cr series uniform composition, concentrated particle size distribution, stable apparent density, and good morphology. Forming a tungsten carbide powder on the surface of the blade, greatly improving the life of the turbine, make sure the work efficiency and maintain the output thermal spray power of turbine. Powder Series Grade Particle size Manufactured Apparent Density (g/cm3) C-10Co-4Cr GP10C -45/+15μm Agglomerated and sintered 4.4-5.2 GP10CU -45/+15μm Agglomerated and sintered 4.7-5.6 GP10CA -45/+15μm Sintered and Crushed 5.8-6.8 02- Performance of the coating Metallographic structure of the thermal spray materials Densified thermal spray coating, good combination interface with matrix, no oxide inclusions, uniform distribution of WC hard phase. Porosity<0.5% Bonding strength>70 MPa Hardness: HV0.3 1100-1350 Corrosion resistance: standard salty test, no corrosion after 240H Working temperature <=500℃ Details of the tungste carbide powder Powder Series Grade Application WC-10Co-4Cr GP10C Medium WC to achieve high performance coating with excellent corrosion resistance and cavitation resistance Mainly used for turbine top cover and bottom ring surface strengthening GP10CU Fine WC to achieve high performance coating with excellent corrosion resistance and cavitation resistance Mainly used for turbine top cover, bottom ring and guide vane surface strengthening GP10CA High densified powder with super cavitation resistance; Mainly used for turbine blade and guide vane surface strengthening      

To improve comprehensive security ability, XTC Luoyang plant held a skill demonstration on Marth 6th 2026. There are two parts in the demonstration. One is theory test and another is practice test. The demonstration further enhanced the safety consciousness of security personnel to ensure the safety of the whole plant. Our company produce Thermal Spray Powder，Welding Material， Laser Cladding Powde, PTA Welding Powder，Shield Cutters，Metal Alloy Powder for 20 years. We also have ISO9001, ISO14001, ISO45001.

Case study of thermal barrier coating（2） It is believed that the peeling of the ceramic layer is not the sudden cracking at the interface, but the residual stress induced the cracking of the thermal spray coating layer along the thickness direction. The residual stress in the thermal barrier coating mainly comes from three aspects: the thermal stress generated during the molten droplet cooling during the plasma spraying; the thermal stress caused by the thermal barrier coating; the high temperature growth stress of the bonding layer after the thermal cycle oxidation. For the first type of stress, it has been described above that using the preheated matrix and optimizing the spraying parameters can reduce the residual stress in the spraying process. For the latter two types of residual stress, the double ceramic layer structure can be solved. MaW et al. prepared La2CeO7 / 8 YSZ double-layer ceramic thermal barrier coating. Compared with La2CeO7 and 8 YSZ coatings alone, this design of double-layer ceramic coating effectively overcame the thermal expansion mismatch between La2CeO7 coating and binding layer, and its life was significantly higher than that of La2CeO7 and 8 YSZ coatings alone under high temperature cycle conditions. Similarly, Liu Z G et al. prepared the bilayer (La0.8Eu0.2) 2 Zr 2 O 7 / YSZ, peeling off parts of the coating after the thermal cycle test. And peeling area microscopic morphology as shown in figure 6, long strip cracks mostly occur between two kinds of ceramic layer and YSZ coating, coating damage mainly occurs on the outer surface of the ceramic layer, and combined layer thermal growth oxide layer is not obvious, shows that the structure of the coating can effectively delay the damage of the coating. In the double layer ceramic structure, the upper ceramic layer has low thermal conductivity and high phase stability, which can play the role of heat preservation and protecting the inner layer. This double layer ceramic structure shows good development potential in the research of new thermal spray powder. Thermal insulation effect is a basic performance requirement for the ceramic layer, which is not only related to the physical performance parameters of the thermal spray materials, but also affected by the internal structure of the coating and the phase composition of the coating. It is generally believed that increasing the number of cracks inside the coating can improve the thermal insulation performance of the coating. Liu Yang et al. simulated the relationship between the porosity content and composition and the thermal insulation of the coating. The results showed that the ceramic thermal spray powder insulation is enhanced with the increase of the porosity and the pore transverse and vertical ratio, but the excessive pore content in the coating will reduce the binding strength of the coating. Li Haoyu under different spraying power such as Gd PO4 / YSZ the double ceramic structure of ultra-high temperature TBCs, low spraying power due to insufficient powder melting, coating appear certain cracks, these cracks can improve the toughness and thermal insulation, but the high spraying power causes GdPO 4 phase decomposition into GdPO 7 phase, adversely affect the thermal conductivity, thermal expansion coefficient and mechanical properties of the coating. In short, the thermal spray powder needs to have heat insulation, high temperature resistance and other properties. Optimizing the coating material by doping rare earth elements can improve the high temperature resistance of the ceramic layer. Residual stress has a great impact on the thermal barrier coating. So the internal stress of the coating can be reduced by optimizing the coating structure and preparing a new double-layer ceramic heat insulation layer. Pres and cracks have a positive effect on the thermal barrier coating. Optimizing the spraying parameters to control the pores and cracks or phase composition of the coating can improve the thermal conductivity of the coating and improve the heat resistance of the thermal spray coating.  

Thermal spray is a new technology of surface strengthening and protecting, is a great part of surface modification. As the development of science and technology, thermal spray technology has obtained extensive promotion and application all over the country, especially towards ball valves among petrochemical industry. For the situation where high temperature, high pressure and medium containing solid particles exist at the same time, hard sealed ball valve is a kind of commonly approved valve.   Luoyang Golden Egret Hard Facing materials division has thermal spray materials. Tungsten carbide powder WC-10Co-4Cr.Cr3C2-25(NiCr) .WC-20Cr3C2-9Ni, mainly used for hard seal materials of ball valves. The tungsten carbide powder is even in composition, with concentrated particle size distribution, stable apparent density, highly spherical shape. Applying with HVOF craft to form a WC based of Cr3C2 based coating structure on the surface of ball valves. The sealed face formed after process has a great abrasion and corrosion resistance, high temperature resistance and sealability, so as to extend the service life of ball valves. Inside water, gas and oil medium, the coating service life will be increased to 10-20 times, under the environment of severe wash-out, the service life could be increased to more than 5 times.   For the three compositions of powder, we provide different grade, but the process is all the same: agglomerated and sintered.   01. Product Series WC-10Co-4Cr: GP10C-2 (15-38um, apparent density 4.4-5.2g/cm3) GP10C-7(10-38um, apparent density≥4.2 g/cm3) Cr3C2-25(NiCr): GP25NC(15-45um, apparent density≥2.3 g/cm3) GP25NC-7(10-38um, apparent density≥2.3 g/cm3) WC-20Cr3C2-9Ni: GP09N (15-45um, apparent density 3.7-4.7g/cm3) GP09N-19 (5-30um, apparent density 3.7-4.7g/cm3)     02. Coating Performance The coating performance is excellent applied with HVOF, details as follows: 1) Metallographic Structure Dense coating, great bonding with matrix, oxide is unseen, WC.Cr3C2 particles are distributed evenly. 2) Porosity Porosity is less than 0.5% 3) Bonding Strength Bonding strength is greater than 70MPa 4) Micro Hardness Micro harness test press of coating is good, no subside, the hardness is consistent WC-10Co-4Cr HV0.3 1100-1350 Cr3C2-25(NiCr) HV0.3 850-1100 WC-20Cr3C2-9Ni HV0.3 1000-1200 5) Coating Corrosion Resistance Under standardized salt spray test, no obvious corrosion trace appeared after 240H. 6) Coating Sealing Property The coating has great sealing property, passes the dye penetrant inspection. 7) Coating High Temperature Resistance The thermal spray coating has excellent high temperature resistance, the applying temperature of WC-10Co-4Cr series is ≤540℃, the applying temperature of Cr3C2-25(NiCr) series is ≤870℃ and for WC-20Cr3C2-9Ni series, the applying temperature is ≤760℃. Introduction of Thermal Spray Powder Coating Application on Hard Seal Ball Valves in Petrochemical Industry.   WC-10Co-4Cr series: Medium WC used, with great wear resistance and corrosion resistance, mainly applied to hard seal working condition required of high hardness, high corrosion resistance. Cr3C2-25(NiCr) series: Using Cr3C2 for hard phase, great abrasion resistance, excellent corrosion and high temperature resistance, mainly applied to hard seal working condition required of high corrosion and high temperature resistance. WC-20Cr3C2-9Ni series: Medium WC used, Cr3C2 for hard phase, great wear resistance, excellent corrosion and high temperature resistance, mainly applied to hard seal working condition required of high abrasion resistance, high corrosion resistance.

Case study of thermal barrier coating    Thermal barrier coating (Thermal spray powder, TBCs) is a protective coating used in high temperature environment such as turbine blade, combustion chamber wall and tail nozzle of aero engine. Different from the traditional protective coating structure, the thermal barrier coating usually consists of a metal bonding layer and a layer of Oxide Ceramics Powder insulation layer, sometimes adding oxygen barrier layer, sealing layer and gradient layer to form a multi-layer structure or gradient structure. The structure diagram is shown in Figure 5. The bonding layer in the thermal barrier coating mainly plays the role of alleviating the mismatch of the thermal expansion coefficient between the ceramic layer and the matrix, and improving the physical compatibility between the two, while the main ceramic layer directly faces the external high temperature environment, which needs to have low thermal conductivity, high expansion coefficient and high thermal stability. At present, the most commonly used ceramic layer material is YSZ, but 1200℃ is the limit of the use of this material. When the temperature exceeds the limit temperature, ZrO2 will be phase change, leading to a certain expansion of the coating, affecting the use of the coating. In recent years, new ceramic layer materials developed for thermal barrier coating mainly include YSZ, GdYSZ, La2Zr2O7, CePO 4, etc. The specific physical parameters of coating are shown in Table 2. As can be seen from the names of the materials in the table, the thermal barrier coating ceramic materials can be mainly divided into rare earth doped YSZ, rare earth doped zirconate, rare earth phosphate, rare earth silicate, etc. The use temperature of the rare earth doped YSZ material is significantly higher than that of the traditional YSZ material, because the doped rare earth oxide increases the lattice distortion of ZrO2, which reduces the thermal vibration frequency of the lattice, and reduces the thermal conductivity when the thermal expansion coefficient of the coating is basically unchanged.  The coating service environment of the thermal barrier coating is very bad. In addition to the phase change, the residual stress of the ceramic layer and the thermal corrosion of the ceramic layer by the high temperature environment will make the coating peel off and fail in advance. Thermal corrosion is a serious problem faced by the thermal barrier coating. In the fuel of the engine, a large number of Na, V, S and other elements will destroy the internal structure of the coating under the high temperature environment and accelerate the failure of the coating. Taking YSZ coating as an example, the occurrence of thermal corrosion is the chemical reaction between yttrium oxide and corrosion salt, generating new compounds, which consumes the content of Y2O3 in YSZ and produces a certain phase change in YSZ, and the generation of phase change stress will accelerate the expansion of cracks inside the coating. Thermal corrosion is the cause of the failure of the coating structure, while the residual stress is the main reason for the peeling of the ceramic layer. 

Luoyang Golden Egret Geotools material product series-Introduction to the application of thermal spray powder to wear resistance strengthening of tooth surface of corrugated roller in paper making.   Thermal spraying technology is a mature surface strengthening and protection technology, and is an important part of surface modification. With the development of science and technology, thermal spraying technology has achieved good results in the wear resistance of the teeth of paper making corrugated rod and has been widely promoted and applied. Corrugated roller as the core part of the cardboard line, in its use process is a continuous wear process, its wear resistance and service life are the main technical indicators to measure its quality and economy. Due to the shape of the corrugated roller, the surface of these parts need to be repaired at a high cost, through thermal spraying technology to repair the corrugated roller, has a good economy, so that the service life of the corrugated roller is greatly extended, reaching 3-6 times of the chrome layer. The thermal spray powder used by Luoyang Jinlu for paper making corrugated rollers are mainly tungsten carbide powder--WC-12Co and WC-10Co-4Cr series, with uniform composition, concentrated particle size distribution, stable bulk ratio and high sphericity. Using thermal spraying process to form a WC-based coating structure on the surface of the corrugated roller, the tungsten carbide powder with high hardness, high wear resistance, low porosity and low surface roughness can be prepared, which greatly improves the working life of the corrugated roller, reduces the surface treatment cost and has excellent economy. 01Product Series Product series Grade  Specification  Powder type Apparent density   WC-12Co GP12-2 -38/+15 Agglomerated and Sintered 4.3-5.0 GP12U-19 -30/+5 Agglomerated and Sintered 4.7-5.6 WC-10Cr-4Cr GP10CU-19 -30/+5 Agglomerated and Sintered 5.0-6.2  02Coating propertyThe coating performance obtained by high velocity oxygen fuel process is excellent, as follows: 001 Metallographic structure The thermal spray coating is compact, well combined with the matrix interface,no oxide inclusion, and WC hard particles are evenly distributed. 002 Porosity Porosity<0.3% 003 Bond strength The coating bonding strength is greater than 70MPa 004 Microhardness The indentation of coating microhardness test is in good condition, without collapse, and the hardness is uniform WC-12Co         HV0.3 1100-1200； WC-10Co-4Cr   HV0.3  1100-1250； 005 Corrosion resistance of coating After the standard neutral salt spray test, no obvious corrosion traces appeared in the coating samples after 240H Application of thermal spray powder for abrasion resistance strengthening of tooth surface of corrugated roller for paper making Product series Grade Application description             WC-12Co             GP12-2 The medium particle WC is used to obtain excellent wear resistance and impact resistance  ductile spraying materials. Mainly used in corrugated roller carton machinery, single-sided machine, suitable for A/B/C corrugated type;       GP12U-19 Using fine particle WC, the coating is more dense and the surface roughness of the coating is low; Recommended for E/F/ corrugated type, high coating hardness, good wear resistance.       WC-10Co-4Cr       GP10CU-19 Fine particle WC is used to obtain excellent wear resistant and corrosion-resistant coating structure, with dense coating and low surface roughness; Mainly used in A/B/C corrugated type, coating hardness is high, good wear resistance.

Thermal spray powder is a new technology of surface strengthening and protecting, is a great part of surface modification. As the development of science and technology, thermal spray technology has obtained extensive promotion and application on strengthening wear resistance of papermaking corrugator roll tooth surface. Corrugator roll is the core part of paperboard production line, it is a continuous wearing process of using it. it costs a lot to recover the surface of these parts. Recovering corrugator roll through thermal spray technology is more economic and will greatly extend service life of rolls, and could reach 3-6 times of Chromium plated layer. Chromium Carbide Powder is also widely used for roller. Thermal spray powder suitable for papermaking corrugator roll of Luoyang Golden Egret is mainly two kinds: WC-12Co and WC-10Co-4Cr series. The tungsten carbide powder is consistent in composition and has a concentrated particle size distribution, stable apparent density, high sphericity. Spraying WC based powder on the surface of corrugator roll could form a coating with high hardness, great wear resistance, low porosity and low surface roughness, strongly increases the work life of corrugator rolls, lower the cost of surface treatment, which is more economic. 01. Product Series WC-12Co: GP12-2 (15-38um, apparent density 4.3-5.0g/cm3) GP12U-19 (5-30um, apparent density 4.7-5.6 g/cm3) WC-10Co-4Cr: GP10CU-19 (5-30um, apparent density 5.0-6.2/cm3)   GP12-2 GP12U-19 GP10CU-19   02. Coating Performance The coating performance is excellent applied with HVOF, details as follows: 1) Metallographic Structure Dense coating, great bonding with matrix, oxide is unseen, WC particles are distributed evenly. 2) Porosity Porosity is less than 0.3% 3) Bonding Strength Bonding strength is greater than 70MPa 4) Micro Hardness Micro harness test press of coating is good, no subside, the hardness is consistent WC-12Co HV0.3 1100-1200 WC-10Co-4Cr HV0.3 1100-1250 WC-20Cr3C2-9Ni HV0.3 1000-1200 5) Coating Corrosion Resistance Under standardized salt spray test, no obvious corrosion trace appeared after 240H. 03. Application WC-12Co series: GP12-2: Medium WC used, with great wear resistance and impact resistance, mainly applied to corrugator roll carton machinery, single facer, suitable for A/B/C corrugator type. GP12U-19: Fine WC used, more dense coating , lower surface roughness, recommended for E/F corrugator type, offers great hardness and wear resistance of coating. WC-10Co-4Cr series: GP10CU-19: Fine WC used, with great wear resistance and corrosion resistance, dense coating with lower surface roughness, mainly applied to A/B/C corrugator type, offers great hardness and wear resistance of coating.

Luoyang Gold Egret Geotools will have a Spring Festival holiday from February 14th to February 24th.  If you have any purchase requirements (Thermal Spray Materials, Tungsten Carbide Powder, Weld Materials) during this time. You can leave message on our whatsapp +86 15896607573.    Wish you a happy new year!  

 High Velocity Oxygen Fuel (HVOF powder) coating is a thermal spray coating process, which is used to improve or restore a component's surface (properties or geometry). This coating surface engineering technique better enables life extension of equipment by increasing erosion and wear resistance, and corrosion protection. there are some problems on coating when spray by HVOF as bleow: Coating bond fails at the surface Reason1: surface contaminant(oil, water, variant matter) Solution: keep parts clean, remove oil and preheat to 250°F(107℃) Reason2:Incorrect preparation of substrate suface Solution: Improve prepared surface profile by sandblasting or adding more threads for per inch(min=200-250Ra) Reason3: Substrate overheat during spraying Solution: Ensure proper spray distance, lateral speed and RPM Reason4:geometrical shape of parts Solution:the coating covers the edges, spray thinner on edges with less substrate Reason5:Stress caused by coating overheating Solution: 1. the spray is too thick for substrate geometry. to reduce the thickness. 2. substrate overheating, do not exceed 300℉(150℃) 3.coating is too hard, adjust spraying parameters to reduce heat. follow the instructions in the spray parameter table. Reason6:spray angle of gun is not optimized Solution:ensure that spray angle is optimal for maximum bond strength(90° is not always optimal-usually causes particles to bounce)   Coating cracks Reason1: substrate overheating Solution: cool down the substrate, do not exceed 300℉(150℃) Reason2: coaitng is too hard Solution: adjust spraying parameters to reduce heat, keep the substrate cool, improve the lateral speed and RPM Reason3:powder feeding problem Solution: 1. feeding rate is too low, so that the particles overheat, improve the feeding rate 2. carrier gas pressure or flow rate is incorrect. check against recommended parameters Reason4: powder particles or existing coatings overheat Solution: adjusting spray parameters to reduce heat, keep the substrate cooler, and increase the lateral speed and/or speed RPM, contribute to keep coating cooler and cool the parts more     Stratification of thermal spray powder particles Reason1:bond failure due to interlayer contaminants Solution:ensure that dust particles are always moving from the substrate to all parts. dust removal may not be sufficient to remove oversprayed particles Reason2:coating get too hot between each spray Solution:adjust spraying parameters to reduce heat, keep the substrate cool, improve the lateral speed and RPM Reason3:flame temperature is low and the particles are not sufficiently heated solution:adjust spraying parameter to icnrease heat, increase barrel length or reduce pwoder feeding rate Reason4:powder particle size is too large and particels are not sufficiently heated Solution:increase the barrel length, adjust the spray parameters to increase the flame temperature, or reduce the powder feeding rate. use powder of suitable size designed for JP5000 Reason5:powder particle size is too small and the particles are overheated Solution:reduce barrel length and increase powder feeding rate. use powder of suitable size designed for JP5000   High Porosity Reason1: to pull out in turing, grinding or polishing Solution: 1. going out with too much materials at once. one cut or grind is too rough 2.unmelted particles in coating, increase flame temperature to increase particle heat Reason2:powder contains too many coarse particles Solution:increase barrel length, increase flame temperature. use powder of suitable size designed for JP5000 Reason3:powder feeding rate is too high Solution:reduce powdre feeding rate Reason4:spray parameter is too low Solution:adjusting the fuel/oxygen ratio to increase the flame speed gives more functionality Reason5:angle of the spray gun on the rotating part Solution:spray at an angle slightly inclined to the rotation direction of the part so that the spray direction is not 90° from the center of the part Reason6:incorrect spray distance may be too far Solution:move the spray gun to the correct spray distance, about 15[(38cm)   High oxide levels Reason1:substrate overheating Solution:reduce spray parameter to reduce heat, keep substrate cool, increase lateral speed and/or speed RPM, and check spray distance Reason2:too much fine powders Solution: 1. reduce barrel length and adjust spraying parameters to reduce flame temperature or increase powder feeding rate 2. use powder of suitable size designed for JP5000   insufficient hardnees of coating Reason1:intergranular stratification Solution: 1. adjusting the fuel/oxygen ratio to increase the flame speed gives more functionality 2. reduce powder feeding rate and increase particle heat Reason2:powder particle velocity is too low Solution:adjusting the fuel/oxygen ratio to increase the flame speed gives more functionality Reason3:powder particle size is too large Solution:increase the barrel length, adjust the spray parameters to increase the flame temperature, or reduce the powder feeding rate. use powder of suitable size designed for JP5000 Reason4:incorrect spray distance may be too far Solution:move the spray gun to the correct spray distance, about 15[(38cm)   coating is too hard Reason1:substrate overheating Solution:adjust spray parameters to reduce heat, keep substrate cool, and increase lateral speed and/or speed RPM. Reason2:high oxide levels Solution:1. increase the lateral speed/RPM to keep the substrate cool or increase the powder feeding rate to reduce particle heat 2. too much fine powder, use powder of suitable size designed for JP5000   low deposition efficiency Reason1:fuel/oxygen ratio is incorrect Solution:if the particle rebound, adjust the spraying parameters to increase the heat of particles, pay attention not to overheat the substrate Reason2:powder particle size is incorrect Solution:use powder of suitable size designed for JP5000. too large powder particles cause rebound, and too much fine powder causes the flame to blow away the fine powder Reason3:barrel length is incorrect Solution:increase barrel length or increase flame temperature Reason4:carrier gas parameter is incorrect Solution:carrier gas pressure or flow rate is incorrect. check against recommended parameters Reason5:coating too hard(see section coating too hard) Solution:1. adjust spray parameters to reduce heat, keep substrate cool, and increase lateral speed and/or speed RPM. 2. increase the lateral speed/RPM to keep the substrate cool or inrease the powder feeding rate to reduce particle heat Reason6:spray distance is incorrect Solution:move the gun to the correct spray distance, about 15" (38cm), increase the spray distance in small increments and re-evalate the hardness and coating structure.  

1.Wear resistant thermal spray coating The tungsten carbide coating calender with supersonic spraying shows better wear resistance than chilled cast iron, and the tungsten carbide powder also has rolling contact fatigue strength of up to 8Gpa, which fully meets the rolling pressure of the calender roll. Due to the dense coating without holes, corrosion resistance is also better than electroplating roller surface, due to the fine and dense coating, the thermal spray coating can be ground to a mirror finish.This kind of tungsten carbide powder sprayed on the surface of ordinary steel rolls is especially suitable for the manufacture of super large calender rolls, and there is no casting defect of chilled cast iron. In addition, this coating can also be sprayed on the surface of the dewatering tank panel, and the wear resistance of only 0.15mm is enough to be several times better than stainless steel. 2.Hydrophilic coating The use of oxyacetylene flame spray coating, used in the coating machine coating, water application roller, hydrophilicity is much better than the electroplating roller surface, water, feeding uniformity is good. This hydrophilic function of the coating is mainly due to the micro-pores of the sprayed ceramic coating, which has the ability to absorb water and enhance the wettability of the coating, and when the coating has a certain thickness, the capillary pores of the straight through the body can be eliminated, so the coating will not appear in a short period of time. Generally, the coating of 0.5mm thickness is enough to make the roller have a life of about three years. The ceramic coating ring can be sprayed on the surface of the steel roller, replacing the traditional stone roller, especially the large stone roller which is difficult to make. 3.Anti-stick coating Both ceramic and cermet coatings have the characteristics of non-adhesion to unrelated substances, and can be used on the surface of the first drying roller in the drying area, which can effectively prevent the occurrence of adhesive. The wear resistance life of this coating is much greater than that of fluoroplastic anti-stick coating, and the anti-stick effect is no less than that of plastic coating. 4.Non-slip coating Mo spray powder, as the most original thermal spraying material, has been widely used in paper machine rewinding rolls, and Mo is not an ideal non-slip material, because M. has self-lubricating properties. At present, in addition to some lack of lubrication conditions and need to lubricate friction parts (such as internal combustion engine piston rings) also use spray aluminum, Mo has been replaced in most cases by new spray materials. For large paper rolls, Mo powder by oxyacetylene flame spraying is often unable to reach high bonding strength because it cannot be preheated. However, the coating of M. powder with arc will oxidize the coating due to the high temperature. With ultrasonic spraying WC or NiCr alloy, not only can achieve the non-preheating construction of large workpieces, but also obtain a dense, delicate coated surface, and tungsten carbide coating has a higher friction coefficient, far better than Mo coating anti-skid performance. In short, the application of Oxide Ceramics Powder and cermet in paper making machinery is far more than the above, and better coatings are waiting for our development and utilization to meet the needs of a variety of complex working conditions.

In today's industrial field, cemented carbide tools such as cutter, oil wells drilling bits, impact drilling bits, etc., are gradually replacing traditional tool materials with their excellent thermal, mechanical and chemical properties. The core raw material of this high-quality tool is tungsten carbide powder (WC powder), which is made by a special process of powder metallurgy. Compared with conventional tools, cemented carbide tools show significant advantages, including great hardness and strength, excellent red hardness, wear resistance, toughness, heat resistance and corrosion resistance. It is particularly striking that the hardness and wear resistance of cemented carbide tools can remain stable even at a high temperature of 500 ° C, while at 1000 ° C, its hardness is still quite high. These excellent properties are attributed to the unique properties of WC powder. Tungsten carbide powder is a black hexagonal crystal powder with a metallic luster, melting point up to 2870 ° C, boiling point to 6000 ° C. Its hardness is comparable to diamond, with good electrical and thermal conductivity. At room temperature, the relative density of WC powder is about 15.63g/cm³. It is insoluble in water, hydrochloric acid and sulfuric acid, but it can be easily dissolved in mixed acids such as nitric acid-hydrofluoric acid. Tungsten powder is the key raw material for manufacturing tungsten carbide powder. Ensuring the quality of cemented carbide tools, there are strict requirements for the purity, particle size and particle size distribution of tungsten powder. Thus, it is necessary to introduce a simple and can produce fine and evenly distributed tungsten powder method: First, putting the blue tungsten oxide or yellow tungsten Oxide Ceramics Powder into the ball grinder for milling together with deionized water, slurry will be ready after the grinding materials through the screen. Next, the slurry is mixed with blue tungsten or yellow tungsten oxide powder in a certain proportion, and then the mixture is screened and granulated. Finally, the granulation is treated with hydrogen reduction to obtain fine tungsten powder.