草稿:Wolfram carbide
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[编辑]Wolfram carbide
Wolfram carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Wolfram carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. In particular, its high hardness and wear resistance remain basically unchanged even at a temperature of 500°C, and it still has a high hardness at 1000°C. Wolfram carbide is widely used as a tool material, such as turning tools, milling cutters, planers, drills, boring tools, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel. It can also be used to cut difficult-to-process materials such as heat-resistant steel, stainless steel, high manganese steel, and tool steel.
Application:
Wolfram carbide can also be used to make rock drilling tools, mining tools, drilling tools, measuring tools, wear-resistant parts, metal abrasives, cylinder liners, precision bearings, nozzles, hardware molds (such as wire drawing molds, bolt molds, nut molds, and various fastener molds. The excellent performance of Wolfram carbide has gradually replaced the previous steel molds). In the past two decades, coated Wolfram carbide has also been introduced. In 1969, Sweden successfully developed titanium carbide coated tools. The substrate of the tool is tungsten-titanium-cobalt Wolfram carbide or tungsten-cobalt Wolfram carbide. The thickness of the titanium carbide coating on the surface is only a few microns, but compared with the alloy tool of the same brand, the service life is extended by 3 times and the cutting speed is increased by 25% to 50%. The fourth generation of coated tools appeared in the 1970s and can be used to cut difficult materials. How is Wolfram carbide sintered? Wolfram carbide is a metal material made of carbides of one or more refractory metals and binder metals by powder metallurgy.
Performance characteristics:
High hardness (86-93HRA, equivalent to 69-81HRC); Good hot hardness (can reach 900-1000℃, maintain 60HRC); Good wear resistance. Carbide cutting tools have a cutting speed 4-7 times higher than high-speed steel, and a tool life 5-80 times higher. For manufacturing molds and measuring tools, the life is 20-150 times higher than that of alloy tool steel. It can cut hard materials of about 50HRC. However, wolfram carbide is brittle and cannot be cut. It is difficult to make a complex integral tool, so it is often made into blades of different shapes, which are installed on the tool body or mold body by welding, bonding, mechanical clamping, etc.