W6Mo5Cr4V2钢直柄麻花钻淬火晶粒异常的原因分析  

Analysis on Abnormal As-quenched Grain Size in Straight Shank Twist Drill of W6Mo5Cr4V2 Steel

作　　者：张岸 陈顺民 

机构地区：[1]上海工具厂有限公司技术中心,上海200093

出　　处：《热处理》2012年第4期57-59,共3页Heat Treatment

摘　　要：W6Mo5Cr4V2钢制φ10 mm轧制直柄麻花钻,经正常温度淬火后发现晶粒异常长大。采用金相检验、化学成分分析、轧制工艺验证和原材料淬火试验等分析了晶粒异常的原因。结果表明,该批直柄麻花钻异常大的淬火晶粒是由于坯料的锻造变形量过小及终锻温度过高所致。The grains in rolled 10-mm-diam straight shank twist drills of W6Mo5Cr4V2 steel were abnormally coarse after quenching from normal temperature, and the cause for this abnormal grain size was investigated by means of metallographic test, chemical composition analysis, verification of rolling process and quenching test of the stock. The results show that the abnormally coarse grains in the straight shank twist drills arise from both the insufficient forging deformation and the excessively high final forging temperature.

关 键 词：直柄麻花钻 异常晶粒 坯料 缺陷 

分 类 号：TG115[金属学及工艺—物理冶金]