Cr12MoV钢模具线切割开裂原因分析  

Cracking Reason Analysis of Cr12MoV Steel Die during Spark Cutting

作　　者：吴晓峰[1] 马坤[2] 徐娜[1] 时军波[1] 李志军 臧启山[4] 

机构地区：[1]山东省分析测试中心,济南250014 [2]沧州师范专科学校,沧州061001 [3]山东金麒麟集团,乐陵253600 [4]中国科学院金属所,沈阳110016

出　　处：《理化检验（物理分册）》2010年第2期128-130,137,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：山东省科学院博士基金资助项目(2007.8)

摘　　要：采用断口观察、金相检验、化学成分分析、硬度检验等方法对Cr12MoV钢模具在线切割过程中产生开裂的原因进行了分析。结果表明:热处理工艺不当引起模具内的残余应力较大,加上线切割时导致模具内的残余应力重新分布,使模具在线切割时局部边缘产生超过材料抗拉强度的拉应力是导致模具开裂的主要原因;另材料显微组织中的共晶碳化物最大尺寸严重超标,是导致该模具线切割时开裂的另一原因。By fracture surface observation, metallographic examination, chemical composition analysis and hardness test, the cracking reason of Cr12MoV steel die during spark cutting process was conducted. The results show that heat treatment induced big residual stress which redistributed during spark cutting was the main reason for the die cracking. Eutectic carbide size was out of limits, which made the die material easy to crack along euteefic carbide, was another reason

关 键 词：CR12MOV钢 冷作模具钢 线切割 失效分析 

分 类 号：TG142.45[一般工业技术—材料科学与工程]