34CrNi3MoV钢传动主轴调质开裂分析
Cracking analysis of 34CrNi3MoV steel transmission spindle quenched and tempered
李子岩 1许鸿翔 1何潇 1刘志强 1郭敬强 1陈生超 1卢金生1
作者信息
- 1. 郑机所(郑州)传动科技有限公司,河南 郑州 450001
- 折叠
摘要
34CrNi3MoV钢传动主轴经调质处理后在半精车工序检测出外圆面存在纵向淬火裂纹.对裂纹源附近的化学成分、硬度梯度、显微组织以及淬火介质进行检测,并分析裂纹面宏观形貌特征,针对裂纹面的横截面进行金相显微镜、SEM和EDS表征.结果表明,传动主轴中C和Ni元素含量超出标准范围上限,致使调质工艺参数不当,但传动主轴调质处理前存在微裂纹是导致开裂失效的主要因素.
Abstract
After quenching and tempering,a longitudinal quenching crack was detected on the outer circular surface of the 34CrNi3MoV steel transmission spindle during the semi precision turning process.The chemical composition,hardness gradient,microstructure near the crack source and quenching medium were detected,and the macroscopic morphology characteristics of the crack surface were analyzed.Metallurgical microscope,SEM and EDS characterizations were conducted on the cross section of crack surface.The results show that the contents of carbon and nickel elements in the transmission spindle exceed the upper limit of the standard range,resulting in inappropriate quenching and tempering process parameters.However,the presence of microcracks before quenching and tempering in the transmission spindle is the main factor leading to cracking failure.
关键词
34CrNi3MoV钢/传动主轴/失效分析Key words
34CrNi3MoV steel/transmission spindle/failure analysis引用本文复制引用
基金项目
河南省中央引导地方科技发展资金项目(113ZP20220165)
出版年
2024
NETL
NSTL
万方数据