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本文研究了结晶学位向和试验温度对WC单晶硬度的影响以及多晶碳化钨的热硬度,并研究了碳化物粒子大小和粘接相数量对某些硬质合金的热硬度的影响。由于增加温度,单昌WC在所有被评定的主要结晶学位向上的热硬度很快地降低,并且其最硬位向上的单晶硬度只有多晶材料硬度的一半左右(取决于试验温度)。因为其多晶特性,某些钴粘结硬质合金能在某中间温度范围内比单晶WC更硬些。
In this paper, the effect of crystallographic orientation and test temperature on the hardness of WC single crystal and the hot hardness of polycrystalline tungsten carbide were studied. The effects of carbide particle size and the number of bonding phases on the hot hardness of some cemented carbides were also studied. As a result of the increase in temperature, the hot hardness of the single crystal WC at all of the major crystallographic sites assessed was rapidly reduced and the single crystal hardness at its hardest point was only about half the hardness of the polycrystalline material (depending on the test temperature). Because of their polycrystalline nature, some cobalt-bonded cemented carbides are harder than single-crystal WC at some intermediate temperature range.