Basic use: About 50% of the tungsten ore mined in the world is used for the smelting of high-quality steel, about 35% is used for the production of hard steel, about 10% is used for making tungsten wire, and about 5% is used for other purposes. Tungsten can be used to manufacture firearms, rocket propeller nozzles, armor-piercing bullets, metal-cutting blades, drills, superhard dies, wire drawing dies, etc. Tungsten is widely used in mining, metallurgy, machinery, construction, transportation, electronics, chemical industry, Light industry, textile, military industry, aerospace, science and technology, various industrial fields.
Tungsten is widely used in modern technology in pure metal state and alloy system state. The most important alloy system state is alloy steel, tungsten carbide-based cemented carbide, wear-resistant alloy and strong heat alloy. Tungsten is mainly used in the following industrial fields:
Steel industry: Tungsten is mostly used in the production of special steel. The widely used high speed steel contains 9%-24% tungsten, 3.8%-4.6% chromium, 1%-5% vanadium, 4%-7% cobalt, 0.7%-1.5% carbon. The characteristic of high-speed steel is that it can be automatically quenched at a high tempering temperature (700-800℃) in the air, so it maintains high hardness and wear resistance until 600-650℃. Tungsten steel in alloy tool steel contains 0.8%-1.2% tungsten; chromium-tungsten silicon steel contains 2%-2.7% tungsten; chromium-tungsten steel contains 2%-9% tungsten; chromium-tungsten-manganese steel contains 0.5%- 1.6% tungsten. Tungsten-containing steel is used to manufacture various tools: such as drills, milling cutters, wire drawing dies, female and male dies, air tools and other parts. Tungsten magnet steel is a permanent magnet steel containing 5.2%-6.2% tungsten, 0.68%-0.78% carbon, and 0.3%-0.5% chromium. Tungsten-cobalt magnets contain 11.5%-14.5% tungsten, 5.5%-6.5% molybdenum, and 11.5%-12.5% cobalt hard magnetic materials. They have high magnetization and coercivity.
