Fine crystalline tungsten carbide powder has stable chemical properties, and hardness is similar to that of diamond, which is a good conductor of electricity and heat. It is wear-resistant, corrosion-resistant, and high-temperature resistant. It is the main raw material for producing fine-grained carbide.
Applications
Fine-grain tungsten carbide powder is the main raw material for producing fine-grained hard alloys. Ultrafine grained tungsten carbide is tungsten carbide with a grain size of tungsten carbide less than 1μm. It has higher hardness, strength, toughness, abrasion resistance, and erosion resistance than cemented carbide with a medium grain size. It is widely used in the manufacture of precision molds, micro drills, printer needles and cutting, drilling, machinery and other tools.
Preparations
There are many methods for preparing fine-grain tungsten carbide powders, but they can be divided into chemical and mechanical methods. The chemical methods mainly include spray thermal conversion method, organic salt thermal decomposition method, and one-step reduction carbonization method. The mechanical methods are mainly high-energy ball milling, vibratory ball milling and mechanical alloying.
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