摘要
ＷＣＣｏ硬质合金深冷处理强化机理刘寿荣（天津硬质合金研究所）刘方（济南第二机床厂）本文收到日期：１９９６年１２月５日初稿，１９９７年３月２７日修改稿本文联系人：刘寿荣，男，１９３９年１１月２９日生，高级工程师天津市（３００２２２）河西区珠江道街同...
The strengthening mechanism of WC Co cemented carbides by cryogenic treatment was studied. The experiment results showed that, cryogenic cooling in liquid nitrogen for 10～100h can obviously raise the macro compressive stress on alloy surface resulting in strengthening WC Co alloy to some extent. Altering the stress state between WC phase and γ phase and inducing martensitic transformation of γ phase by cryogenic cooling are all related to the restraint role of WC skeleton to γ phase. So the more the Co content in alloy, the less the effect of cryogenic cooling is.
