60Si2CrVA弹簧钢绕簧断裂过热缺陷分析  

Analysis of fracture and overheating defects in 60Si2CrVA spring steel coil springs

作　　者：王鹏飞 陈昌华 时飞扬 WANG Pengfei;CHEN Changhua;SHI Feiyang(Technology Center,Nanjing Develop Advanced Manufacturing Co.,Ltd.,Nanjing 210048,China;School of Metallurgy Engineering,Anhui University of Technology,Ma'anshan 243002,China)

机构地区：[1]南京迪威尔高端制造股份有限公司技术中心,江苏南京210048 [2]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《物理测试》2023年第6期60-65,共6页Physics Examination and Testing

摘　　要：某轧钢厂将钢号为60Si2CrVA、尺寸为156 mm×156 mm的方坯轧成Ф60 mm、Ф65 mm圆钢,圆钢送弹簧制造厂绕制弹簧,并在绕制弹簧过程中发生开裂。为了找出60Si2CrVA弹簧钢绕簧断裂原因,对弹簧钢解剖取样进行低倍检验、硬度检验、金相检验、断口分析、化学成分分析等检测。结果表明:弹簧钢母材存在严重过热现象从而形成纵向裂纹,并在绕制或淬火过程中因纵向裂纹扩展导致断裂。A steel rolling plant rolled square billets with a steel grade of 60Si2CrVA and a size of 156 mm×156 mm into Ф60 mm and Ф65 mm round steel.The round steel was sent to the spring manufacturing factory for winding the spring,and cracking occurred during the winding process.In order to find out the reason for the fracture of 60Si2CrVA spring steel coil spring,the spring steel samples were subjected to low magnification inspection,hardness inspection,metallographic inspection,fracture analysis and chemical composition analysis.The results indicated that there was severe overheating in the spring steel base material,leading to the formation of longitudinal cracks.Therefore,the fracture was caused due to longitudinal crack propagation in the process of winding or quenching.

关 键 词：弹簧钢 断裂 过热 纵向裂纹 

分 类 号：TG115[金属学及工艺—物理冶金]