Cemented carbide is formed by the reaction of carbon and tungsten at a high temperature of 1400-2000 ℃. Because of its hardness as high as 86~93HRA and its ultra-high wear resistance and high cutting speed, it can no longer be called tungsten alloy but hard. Alloys are today mainly used in machining as cutting tools. Cemented carbide has a series of excellent properties such as high hardness, high strength, strong wear resistance and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, even at a temperature of 500 ℃. Remaining unchanged, there is still a high hardness at 1000 °C. However, the high hardness of cemented carbide makes it difficult to process, and it is also brittle, which requires special processes to be processed.
High specific gravity tungsten alloy is also called tungsten heavy alloy. It is mainly made of 90%-98% tungsten material and a small amount of metal powder such as Co, Mo and Cr through a series of processing. The main components are W-Ni-Fe and W-Ni-Cu. Among them, Ni, Fe, and Cu are often used as binders to bond tungsten together, thereby enhancing the ductility of high specific gravity tungsten alloys. High specific gravity tungsten alloys have many excellent properties, such as high density, good elongation, strong corrosion resistance, good radiation absorption and long service life. Compared with cemented carbide, tungsten heavy alloy is easier to process, and it can be used as tungsten alloy radiation shield, crankshaft, and counterweight.
