Metal tungsten is gray-black, ductile, has a density of 19.35g/cm3, and a melting point of 3410±20℃, which is the highest melting point among metals.
The applications of metal tungsten in industry are:
1. Iron and steel industry 1) High-speed steel contains more than 9% tungsten, which is characterized by maintaining high hardness and wear resistance up to a high temperature of 650 °C; 2) Alloy tool steel contains 10% tungsten, which can be used for manufacturing Drills, milling cutters, wire drawing dies and other tools and parts; 3) Tungsten magnet steel contains 5.2-6.2% tungsten, which has high magnetization and coercivity, and is used in military weapons.
2. Tungsten carbide is welded with 85-95% tungsten carbide, and tungsten carbide has high hardness and wear resistance. The cutting speed of carbide cutting tools can far exceed that of tool steel cutting tools, and is widely used in cutting tools, wire drawing dies, mining tools, etc.
3. Heat-strength alloys The heat-strength alloys all contain the most refractory metal tungsten. In the parts that require strong wear resistance, most of the heat-strength alloys are used, such as some parts of aero-engines, turbine impellers, and excavator parts. In addition, tungsten and its alloys are also used as thermally strong materials in the aviation and aerospace fields.
