What are the excellent properties of cemented carbide?

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1) High hardness. The hardness of tungsten carbide cemented carbides generally ranges from HRA 87 to 94, and it remains essentially unchanged within a considerable temperature range. Since the wear rate due to abrasive wear is inversely proportional to hardness, high-hardness cemented carbide materials are ideal friction pair materials for mechanical seals that seal media containing suspended particles. 2) High bending strength. The bending strength of cemented carbides is generally above 1400 MPa, and this strength is related to the size of the WC grains. 3) High thermal conductivity and low linear expansion coefficient. The thermal conductivity of WC-Co cemented carbides is 1 to several times higher than that of high-speed steel, while their linear expansion coefficient is much lower than that of high-speed steel and carbon steel. Therefore, mechanical seals that use cemented carbide as the material for the friction pair rings possess strong resistance to thermal shock and high load-bearing capacity. 4) It has a certain degree of corrosion resistance. Different grades of cemented carbide exhibit varying corrosion resistance in various media. Therefore, different cemented carbides can be selected based on the specific properties of the medium.