某新型低碳贝氏体弹簧钢力学性能失效分析  

Failure Analysis on Mechanical Properties of a New Type of Low Carbon Bainite Spring Steel

作　　者：王楠 王正云[1] 陈杰 汪思敏 栾道成[1] WANG Nan;WANG Zhengyun;CHEN Jie;WANG Simin;LUAN Daocheng(Materials Science and Engineering College, Xihua University, Chengdu 610039, China)

机构地区：[1]西华大学材料科学与工程学院,成都610039

出　　处：《理化检验（物理分册）》2019年第5期329-332,340,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：四川省经信委技术创新项目(16201404);四川省科技厅支撑项目(2014GZ0087);西华大学创新基金资助项目(Ycjj2018070;Ycjj2018176;Ycjj2018069)

摘　　要：制备了一种新型低碳贝氏体弹簧钢并对其进行力学性能试验,结果表明其力学性能很差。采用化学成分分析、硬度测试、金相检验、夹杂物成分分析等方法对其力学性能差的原因进行了分析。结果表明:该低碳贝氏体弹簧钢中存在较多的夹杂物和铸造缺陷,造成了钢材成分不均匀且严重破坏了金属基体的连续性,导致该低碳贝氏体弹簧钢的力学性能变差。A new type of low carbon bainite spring steel was prepared and its mechanical properties were tested.The results show that its mechanical properties were very poor.The reasons for the poor mechanical properties were analyzed by means of chemical composition analysis,hardness test,metallographic examination,inclusion composition analysis and so on.The results show that there were many inclusions and casting defects in the low carbon bainite spring steel,which caused the uneven composition of the steel and seriously destroy the continuity of the metal matrix,resulted in the poor mechanical properties of the low carbon bainite spring steel.

关 键 词：低碳贝氏体弹簧钢 力学性能 铸造缺陷 夹杂物 

分 类 号：TG115[金属学及工艺—物理冶金]