材料科学
硬质合金
杂质
碳化物
合金
冶金
抗弯强度
复合材料
机械强度
化学
有机化学
作者
Tamotsu Fukatsu,Keiichi Kobori,Mitsuo Ueki
标识
DOI:10.1016/0263-4368(91)90024-i
摘要
The present work is concerned with further improvement of the strength of ultra-fine grained cemented carbide. It has been reported already that the strength of the alloy is strongly affected by its structural defects, e.g. pores, Co pools, extraordinary coarse carbide grains or impurity compounds. In this work, the effects of carbide grain growth inhibitors. Co contents and impurities of starting powders on the strength of the alloy have been investigated in relation to the structural defects appearing on the fracture surface of transverse-ruptured specimens. The results obtained showed that the amount of impurities of starting powders most closely affected the strength of the alloy, and an extremely high-strength cemented carbide having transverse-rupture strength of over 500 kgf/mm2 was obtained by using highly purified WC powder.
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