WC-Co系硬质合金Co相的熔点

MEITING P0INT TEMPETATURE OF Co-PHASE IN A SERIES OF WC-Co CEMENTED CARBIDES

用差热分析（DTA）方法研究WC－Co系列硬质合金已相的熔点．研究发现九种WC－Co系列合全具有几乎相同的Co相熔点，其平均值为1372．80℃。Co相的熔点与合金的含Co量无关，取决于WC在Co中的溶解度，相应取决于烧结温度。

The melting point temperature of Co-phase in a series of WC-Co cementcd carbldes were investigated by Differential Thermal Analysis (DTA ). It is found that the melting point temperature of Co- phase in a series of WC -Co Cemented car-tides are about the same, and the average temperature is l372. 80℃ .The rnelting point lemperalure of Co-phase is out of telation to cobalt content in Cemented cabides .and dependent on solubility of WC in Co.ie dependent on sintering tempera-ture.