W18Cr4V合金工具钢在不同介质淬火后性能比较  

Comparison of properties of W18Cr4V alloy steel in various quenching media after quenching

作　　者：程赫明[1] 谢建斌[1] 李建云[1] 

机构地区：[1]昆明理工大学工程力学系,云南昆明650093

出　　处：《材料科学与工艺》2005年第6期640-642,共3页Materials Science and Technology

基　　金：国家自然科学基金资助项目(10162002);教育部出国留学人员科研启动基金项目

摘　　要：通过对W18Cr4V合金工具钢在清水、锭子油和高压气体等淬火介质中淬火对比实验,研究 W18Cr4V合金工具钢在不同介质淬火工艺处理后的硬度和微观结构．研究结果表明,水淬火时试件表面与中心的温差较大,锭子油次之,高压气体较小;试件高压气体淬火时,温度剃度小,内部冷却比较均匀,可以预计,相应的热应力和热变形也比较小;应用较小压力的氮气能够实现淬透性比较好的W18Cr4V工具合金钢的高压氮气淬火处理．The hardness and micro - structures of W18Cr4V alloy steel in various quenching media after quenching were investigated by means of contrastive experiments. The obtained results showed that （ 1 ） the temperature differences between the axis and the surface of the cylinder were largest during water quenching, intermediate during oil quenching, and smaller during gas quenching ; （2） the temperature gradient of work - pieces is smaller during gas quenching and it can be predicted that corresponding thermal strains and thermal stresses are also smaller than during water and oil quenching; （3） the gas quenching technology during small pressure can be realized for good quench -ability W18Cr4V alloy steel.

关 键 词：W18Cr4V合金刃具钢 气体淬火 温度 相变 

分 类 号：TG156.31[金属学及工艺—热处理]