Heat Treatment of WC-Co Hardmetals and Transformation Temperature of Cobalt Phase
来源期刊：工程科学学报1989年第6期
论文作者：赖和怡 杨金辉
文章页码：575 - 580
摘 要：<正> The Present work has found that the transverse rupture stren -gth of WC-Co hardmetals can be improved by queuching heat treatment. The increment of transverse rupture strength （4TRS） was dependent on the cobalt content of hardmetal. The higher the cobalt content of hardmetal is, the more the increment of transverse rupture strength is. The main reason is that the transformation of face centered cubic cobalt stabilized at high temperature to hexagonal close packed cobalt can be depressed by quenching. The transformation temperature of hexagonal close packed cobalt binder phase was determined by differential thermal analysis. It was found that the transformation temperature increases with increase of cobalt content of hardmetal. The reason is that the cobalt binder phase of high cobalt hardmetal contains higher tungsten content than that of low cobalt hardmetal after quenching.
赖和怡，杨金辉
摘 要：<正> The Present work has found that the transverse rupture stren -gth of WC-Co hardmetals can be improved by queuching heat treatment. The increment of transverse rupture strength （4TRS） was dependent on the cobalt content of hardmetal. The higher the cobalt content of hardmetal is, the more the increment of transverse rupture strength is. The main reason is that the transformation of face centered cubic cobalt stabilized at high temperature to hexagonal close packed cobalt can be depressed by quenching. The transformation temperature of hexagonal close packed cobalt binder phase was determined by differential thermal analysis. It was found that the transformation temperature increases with increase of cobalt content of hardmetal. The reason is that the cobalt binder phase of high cobalt hardmetal contains higher tungsten content than that of low cobalt hardmetal after quenching.
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