Cr12MoV钢滚丝轮的失效分析  

Failure Analysis of Cr12MoV Steel Thread Rolling Wheel

作　　者：刘艺梦 王会强[1] 张淼[1] 王小炜 马标 马天 王艳山 冯超 翟海峰 LIU Yimeng;WANG Huiqiang;ZHANG Miao;WANG Xiaowei;MA Biao;MA Tian;WANG Yanshan;FENG Chao;ZHAI Haifeng(College of Mechanical&Electrical Engineering,Hebei Agricultural University,Baoding 071001,Hebei China;Baoding DONGLI Machinery Co.,Ltd.,Baoding 071000,Hebei China;Baoding XINAO Gas Co.,Ltd.,Baoding 071000,Hebei China;Mould Technology Branch,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程学院,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]保定精诚工科汽车系统有限公司模具技术分公司,河北保定071000

出　　处：《热处理》2023年第1期55-58,共4页Heat Treatment

基　　金：河北省重大成果转化项目(21287001Z)。

摘　　要：Cr12MoV钢滚丝轮在使用中发生贯穿性开裂。为揭示滚丝轮开裂的原因,对其进行了宏观检验、化学成分分析、硬度检测、金相检验、断口分析及断口的能谱分析。结果表明:滚丝轮淬火后回火不充分,有尖角状碳化物,具有较高的内应力,韧性较差;滚丝轮的螺纹底部曲率半径过小,是应力集中点。这两方面的因素导致滚丝轮贯穿性开裂。Thread rolling wheel made from Cr12MoV steel cracked through in service.In order to reveal the reason why it cracked,the macro-check,chemical composition analysis,hardness testing,metallographic examination,fracture testing,and energy dispersive spectrum analysis of fracture were carried out for the cracked thread rolling wheel.The results showed that the thread rolling wheel was not adequately tempered after hardening,exhibited sharp carbides,had higher inner stress and poor toughness;and that the curvature radius of thread bottom of the thread rolling wheel was too small,therefore focal point of stress.These two factors resulted in through cracking of the thread rolling wheel.

关 键 词：CR12MOV钢 滚丝轮 贯穿开裂 失效 

分 类 号：TG115[金属学及工艺—物理冶金]