Cemented carbide has a very high hardness, usually between HRA80 and HRA95 (Rockwell hardness A). This is because a certain proportion of cobalt, nickel, tungsten and other elements are added to the cemented carbide, which makes it have very high wear resistance and hardness. The main hard phases in cemented carbide are tungsten carbide (WC) and tungsten carbide cobalt (WC-Co), among which the hardness of WC is very high, even harder than diamond. The cobalt in the WC-Co material can enhance the toughness and corrosion resistance of the material. It should be noted that the hardness of cemented carbide is related to its chemical composition, preparation process, block density and other factors, and the hardness of different types of cemented carbide may be different.
Cemented carbide has high hardness and wear resistance, and is often used for cutting materials and making tools. But not all materials can be easily cut or processed by carbide, and there are some limitations. For example, the cutting performance of carbide tools may vary when cutting different types of steel.
When cutting relatively hard steels, carbide tools often require special coatings or geometric designs to maintain their cutting performance. At the same time, cemented carbide tools cannot cut too brittle materials, such as glass and ceramics. Therefore, cemented carbide is not completely without limitations. It needs to be used in specific application scenarios and needs to be optimized in combination with other materials or design methods.
Post time: May-17-2023
