5CrMnMo钢模具的失效分析  

Failure Analysis of 5CrMnMo Steel Die

作　　者：马标 王会强[1] 张淼[1] 刘艺梦 马天 王小炜 李喆 王艳山 冯超 翟海峰 MA Biao;WANG Huiqiang;ZHANG Miao;LIU Yimeng;MA Tian;WANG Xiaowei;Li Zhe;WANG Yanshan;FENG Chao;ZHAI Haifeng;Hebei Agricultural University(Baoding 071000,Hebei China;Baoding DONGLI Machinery Co.,Ltd.,Baoding 071000,Hebei China;Baoding XINAO Gas Co.,Ltd.,Baoding 071000,Hebei China;Baoding Exquisite Auto Mould Technology Co.,Ltd.,Baoding 071000,Hebei China)

机构地区：[1]河北农业大学机电工学学院,河北保定071001 [2]保定市东利机械制造股份有限公司,河北保定071000 [3]保定新奥燃气有限公司,河北保定071000 [4]精诚工科汽车系统有限公司保定模具技术分公司,河北保定071000

出　　处：《热处理》2022年第6期44-47,共4页Heat Treatment

基　　金：河北省重大成果转化项目(21287001Z)。

摘　　要：5CrMnMo钢模具淬火和回火后发现开裂.除了检查热处理工艺外,还对开裂模具进行了宏观检验、化学成分分析、硬度检测、断口分析和金相检验.结果表明:模具油淬冷却时间过长,淬火应力较大;模具含碳量偏低,并有明显的带状组织,影响了力学性能.模具的开裂是上述因素的综合作用所致.5CrMnMo steel die was found cracking after hardening and tempering. Apart from checking heat treatingprocesses the macro-check, chemical composition analysis, hardness measurements, fracture testing, andmetallographic examination were performed for the cracked die. The results demonstrated that (a) the die wasquenched for too long time in oil therefore had larger quenching stress;(b) the die had lower carbon content andzonal structure, thereby its mechanical properties were adversely affected. The die cracked by the combined actionof the foregoing factors.

关 键 词：热作模具 5CRMNMO钢 开裂 热处理 

分 类 号：TG115[金属学及工艺—物理冶金]