Tungsten steel is a sintered composite material containing at least one metal carbide. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide and tantalum carbide are common components of tungsten steel. The grain size of the carbide components (or phases) is usually between 0.2 and 10 microns, and the carbide grains are held together using a metal binder. Bonding metals are generally ferrous metals, commonly used is cobalt, nickel. Hence the tungsten-cobalt alloys, tungsten-nickel alloys, and tungsten-Ti-cobalt alloys.
Tungsten steel production is to press the powder into billet, and then into the sintering furnace heating to a certain temperature (sintering temperature), and maintain a certain time (holding time), and then cooling down, so as to get the desired performance of tungsten steel material. Tungsten steel (hard alloy) has high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and a series of excellent properties, especially its high hardness and wear resistance, even at 500℃ temperature is basically unchanged, at 1000℃ still has a high hardness. Hard alloy is widely used as materials, such as turning tool, milling cutter, planer, drill, boring tool, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel, can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult materials. The cutting speed of the new hard alloy is hundreds of times that of carbon steel. Tungsten steel (hard alloy) can also be used to make drilling tools, mining tools, drilling tools, measuring tools, wear-resistant parts, metal abrasive tools, cylinder lining, precision bearings, nozzles, etc.
