汽车弹簧扁钢50CrVA中析出物对其性能的影响  

Influence of Precipitates in Automobile Spring Flat Steel 50CrVA on Its Properties

作　　者：范众维 周梓荣[2] 章庆 王明 FAN Zhongwei;ZHOU Zirong;ZHANG Qing;WANG Ming(Technological Center,Fangda Special Steel Technology Co.,Ltd.,Nanchang 330012,China;School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]方大特钢科技股份有限公司技术中心,江西南昌330012 [2]东莞理工学院机械工程学院,广东东莞523808

出　　处：《热加工工艺》2022年第21期98-101,共4页Hot Working Technology

基　　金：江西省对外科技合作重点项目(20141BDH80029);江西省主要学科学术和技术带头人资助计划项目(20182BCB22020);东莞市社会科技发展(重点)项目(20185071021602)。

摘　　要：采用化学分析、硬度测定、金相检验和电子能谱方法对转炉工艺生产的50CrVA板簧早期疲劳断裂进行分析。结果表明:疲劳断片不仅存在严重的氮化物夹杂和卷渣冶金缺陷,而且存在大量贝氏体组织。提高冶金质量并完善热处理工艺可有效提高弹簧钢的疲劳寿命。The early fatigue fracture of 50CrVA leaf spring produced by converter process was analyzed by means of chemical analysis, hardness test, metallographic examination and electronic energy spectrum. The results show that there are not only serious nitride inclusion and slag entrapment defects, but also a large number of bainite structures in the fatigue fragments. It is shown that the fatigue life of spring steel can be effectively increased by improving metallurgical quality and heat treatment process.

关 键 词：50CrVA弹簧钢 析出物 疲劳寿命 断裂 

分 类 号：TG335.5[金属学及工艺—金属压力加工]