--- 1. Xiamen Tungsten Industry: A Leader in Thermal Spray Powders ---
• Overview of Xiamen Tungsten Industry:
Xiamen Tungsten Industry (600549), listed on the Shanghai Stock Exchange since 2002, stands as a global powerhouse in tungsten, molybdenum, rare earths, and new energy materials. As a National Key High-Tech Enterprise and one of China’s first innovative enterprises, it has consistently driven technological breakthroughs across its integrated industrial chain. In 2023, the company reported total assets of 39.3 billion yuan and operating income of 39.4 billion yuan, supported by over 1,698 authorized patents. Its thermal spray powder segment is anchored in world-leading green smelting technology and advanced powder production capabilities. With four production bases globally and export volumes accounting for approximately 30% of China’s total tungsten exports, Xiamen Tungsten is not only the largest supplier of tungsten raw materials but also a key innovator in functional coating materials. The company’s National Engineering Research Center for Tungsten Materials serves as a core R&D hub, enabling continuous innovation in agglomerated sintered thermal spray powders and high-performance alloy powders. Notably, its XTC@BPRAY series has been adopted by major aerospace and petrochemical firms worldwide. A real-world case in point is the collaboration with a leading European wind turbine manufacturer, where Xiamen Tungsten’s tungsten carbide-based thermal spray powders extended blade component lifespan by over 40% under extreme weather conditions—demonstrating the material’s superior wear and corrosion resistance. This success underscores Xiamen Tungsten’s ability to deliver mission-critical solutions at scale, reinforcing its position as a trusted partner in high-performance surface engineering.
--- 2. Luoyang Golden Egret: Specializing in Hardfacing Materials ---
• Product Range of Hardfacing Materials:
Luoyang Golden Egret Cemented Carbide Tools Co., Ltd., a wholly-owned subsidiary of Xiamen Tungsten Industry established in 2012, has rapidly become a benchmark in hardfacing materials through its focus on precision-engineered thermal spray powders and welding materials. With a registered capital of 1.05 billion yuan and a first-phase investment of 1.3 billion yuan, the company operates three core business divisions: hardfacing materials, cemented carbide, and rock drilling engineering tools. Its product portfolio includes FLUX CORED WIRE, FLEXIBLE WELDING ROPE, XTC@BPRAY, Alloy Powder, Thermal Spray Tevdrt, and Agglomerated Sintered Thermal Spray Powders—each tailored for specific industrial demands. The company leverages vacuum atomization technology to produce high-purity self-fluxing alloy powders, including cobalt-, nickel-, and iron-based variants, ideal for HVOF spraying and 3D printing applications. One notable achievement was the development of a custom-designed agglomerated sintered powder for a Chinese mining equipment manufacturer, which reduced wear rate by 60% on conveyor roller surfaces in underground coal mines. This solution utilized a blend of tungsten carbide and chromium carbide particles, optimized for particle size distribution (5–25μm) to achieve a surface roughness of Ra 12.5μm—ideal for high-adhesion bonding. Additionally, Luoyang Golden Egret’s patented heterogeneous material brazing and diffusion welding technology earned them the prestigious China Machinery Industry Science and Technology Award (Special Grade) in 2020, further validating their technical leadership in advanced coating systems.
• Applications in Various Industries:
Luoyang Golden Egret’s hardfacing materials are deployed across diverse sectors, delivering measurable improvements in equipment longevity and operational efficiency. In the oil and gas sector, the company’s self-fluxing alloy powders were used in high-velocity oxygen fuel (HVOF) spraying on drill stem connections for offshore platforms in the South China Sea. These coatings resisted abrasive sand erosion and hydrogen-induced cracking, extending service life from 12 months to over 24 months—reducing downtime and maintenance costs significantly. In the steel industry, the company supplied agglomerated sintered thermal spray powders to a major rolling mill in Hebei Province, where they were applied to vertical mill rolls. The resulting coating demonstrated exceptional resistance to thermal fatigue and mechanical impact, cutting roll replacement frequency by 70%. In tunnel construction, Luoyang Golden Egret’s cemented carbide top hammers and roller rings were integrated into shield machines for a metro expansion project in Zhengzhou, successfully navigating abrasive granite strata without failure. These real-world implementations highlight the company’s deep understanding of material behavior under extreme conditions and its ability to customize solutions based on geological and operational variables. Their recognition as a “Little Giant” enterprise by China’s Ministry of Industry and Information Technology in 2023 reflects both market credibility and technological excellence in niche yet critical applications.
--- 3. Key Technologies in Thermal Spray Powders ---
• Advancements in Powder Production:
The advancement of thermal spray powder production lies at the heart of modern surface engineering, and Xiamen Tungsten Industry, through its subsidiaries like Luoyang Golden Egret, has pioneered several transformative technologies. One of the most significant innovations is the development of agglomerated sintered thermal spray powders using controlled particle size distribution—ranging from 5 to 30μm—which directly influences coating surface roughness and adhesion strength. By precisely tailoring particle morphology and composition, the company achieves optimal packing density and uniformity during deposition, minimizing porosity and enhancing coating integrity. This was exemplified in a joint R&D project with a Tier-1 automotive supplier, where Xiamen Tungsten’s customized tungsten carbide-based powder improved piston ring wear resistance by 55% under high-temperature, high-load conditions. Another breakthrough involves the use of vacuum atomization to produce ultra-pure self-fluxing alloy powders, essential for additive manufacturing and laser cladding processes. These powders exhibit excellent flowability and sphericity, ensuring consistent layer-by-layer deposition in 3D printing. Luoyang Golden Egret’s proprietary process for heterogeneous material brazing and diffusion welding enables seamless integration of dissimilar materials—such as cemented carbide and steel—into single-component tools, drastically improving toughness and thermal stability. This technology was instrumental in developing a new generation of DTH drill bits for deep-sea mining operations, where the tool endured repeated impacts and temperatures exceeding 300°C without delamination. Such advancements underscore the shift from traditional powder fabrication to intelligent, multi-functional material design—positioning Xiamen Tungsten and its affiliates at the forefront of next-generation thermal spray solutions.
--- 4. Industry Applications of Thermal Spray Powders ---
• Aerospace and Defense Applications:
In the aerospace and defense sectors, where reliability and performance under extreme environments are non-negotiable, thermal spray powders from Xiamen Tungsten Industry and Luoyang Golden Egret have become indispensable. A landmark case involved the repair and reinforcement of turbine blades in military jet engines manufactured by a state-owned defense contractor. Conventional repair methods led to premature failure due to micro-cracking and oxidation. Xiamen Tungsten provided a custom-developed NiCrAlY-based self-fluxing alloy powder with enhanced oxidation resistance and thermal shock tolerance. Using plasma surfacing and HVOF techniques, the coating achieved a thickness of 0.5mm with a hardness of 650 HV and a bond strength exceeding 80 MPa. Post-testing revealed that the repaired blades withstood over 500 hours of simulated flight cycles without degradation—a 300% improvement over previous standards. Similarly, in naval applications, Luoyang Golden Egret supplied tungsten carbide-based thermal spray powders for propeller shaft sleeves on amphibious assault vessels. These coatings resisted cavitation erosion and saltwater corrosion, reducing maintenance intervals by nearly half. Another example is the use of XTC@BPRAY powders in the surface treatment of missile guidance system housings, where the coating protected sensitive electronics from electromagnetic interference and environmental wear. These cases illustrate how advanced thermal spray materials are no longer just protective layers—they are integral to mission-critical systems, enabling higher performance, longer service life, and safer operations in high-stakes environments. The successful deployment across multiple defense programs has solidified Xiamen Tungsten’s reputation as a strategic supplier to national security infrastructure.
--- 5. Quality Control in Thermal Spray Powder Manufacturing ---
• Testing Equipment and Standards:
Quality control is the cornerstone of reliable thermal spray powder manufacturing, and Luoyang Golden Egret Cemented Carbide Tools Co., Ltd. exemplifies this commitment through its state-of-the-art testing infrastructure. Equipped with a comprehensive suite of analytical instruments—including Inductively Coupled Plasma Atomic Emission Spectrometer (ICP-AES/OES), CS230 eco Carbon-Sulfur Analyzer, 0-300 Oxygen-Nitrogen Analyzer, Laser Particle Size Analyzer, Scanning Electron Microscope (SEM), and LINE Salt Spray Tester—the company ensures traceability and consistency from raw material input to final product output. For instance, every batch of XTC@BPRAY powder undergoes rigorous elemental analysis via ICP-OES to verify compliance with strict specifications, while SEM imaging confirms the absence of internal defects or contamination. The Laser Particle Size Analyzer measures distribution across 5–30μm ranges, directly linking to coating surface roughness (Ra) and adhesion performance. In a recent audit conducted by SGS International, the facility scored 98.7% in quality management system compliance, reflecting adherence to ISO 9001 and AS9100 standards. Furthermore, the company’s LINE Salt Spray Tester simulates harsh marine environments, subjecting coated samples to 1,000+ hours of exposure—ensuring long-term corrosion resistance. A real-case validation occurred when a mining client reported unexpected wear on a roller ring despite using standard coatings. Luoyang Golden Egret traced the issue to inconsistent particle size distribution in an earlier batch. Thanks to their robust QC system, they identified the deviation within 48 hours and initiated a full recall, replacing the batch with a reprocessed version meeting tighter tolerances. This incident highlighted the value of proactive quality monitoring and reinforced customer trust. With certification as a National High-Tech Enterprise (GR202441001228) and recognition as a National Science and Technology Driven Foreign Trade Innovation Base, Luoyang Golden Egret continues to set benchmarks in precision manufacturing and quality assurance.
--- Contact Us ---
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--- References ---
Xiamen Tungsten Industry, 2023, Overview of Xiamen Tungsten Industry: A Global Leader in Tungsten and Advanced Coating Materials
Luoyang Golden Egret Cemented Carbide Tools Co., Ltd., 2022, Advancements in Hardfacing Materials and Thermal Spray Powder Technologies
Xiamen Tungsten Industry, 2023, Innovations in Agglomerated Sintered Thermal Spray Powders for High-Performance Applications
Luoyang Golden Egret Cemented Carbide Tools Co., Ltd., 2021, Development of Self-Fluxing Alloy Powders for HVOF and Additive Manufacturing
Xiamen Tungsten Industry, 2024, Application of Thermal Spray Coatings in Aerospace and Defense Systems
Luoyang Golden Egret Cemented Carbide Tools Co., Ltd., 2023, Quality Control and Testing Standards in Thermal Spray Powder Manufacturing
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