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The magnetic properties of cemented carbide include coercive force and cobalt saturation magnetization. With the close relationship between the cobalt content and structure of cemented carbide and its coercive force, it can be used, under certain conditions, to measure the WC average grain size, even the hardness. Cobalt saturation magnetization refers to the mass fraction of cobalt that can produce magnetic in cemented carbide, which has a strict correspondence with the cobalt content as well as carbon content of cemented carbide.
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