Cobalt mainly plays the role of bonding metal in cemented carbide. The bond metal gives the carbide its impact-resistant toughness through its ability to plastically deform at room temperature. Specifically, cobalt can wet the hard phase in cemented carbide, giving the cemented carbide good sintering properties. Through liquid phase sintering, the wetting of the hard phase by the bonding metal plays a very important role in obtaining good sintered products. In addition, cobalt’s high-performance alloy steels and high-quality alloys are mostly used in the aerospace industry, for example, in the manufacture of aircraft engines and aircraft frames. In cemented carbide, the cobalt content is usually above 90%, which shows that cobalt has a very important impact on the production and performance of cemented carbide.
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