数控辗环机用5CrNiMo主芯辊断裂失效分析  

Fracture Failure Analysis of 5CrNiMo Main Core RollerUsed in NC Ring Rolling Machine

作　　者：李波[1] 谢彬[1] 孙东海 江绪平 Li Bo;Xie Bin;Sun Donghai;Jiang Xuping

机构地区：[1]东方电气集团东方汽轮机有限公司,四川618000

出　　处：《大型铸锻件》2021年第4期49-50,共2页Heavy Casting and Forging

摘　　要：通过对数控辗环机用断裂5CrNiMo主芯辊的宏观形貌、受力分析、化学成分、硬度检查、金相组织等进行检测,并结合数据剖析及相关理论知识进行分析,明确了该5CrNiMo主芯辊断裂失效是由C含量超标引起脆性加大、组织偏析及疲劳缺陷所致。Through the macroscopic morphology,force analysis,chemical composition,hardness inspection,metallographic structure and so on of 5CrNiMo main core roller for CNC ring rolling machine,and combined with the data analysis and related theoretical knowledge,it is clear that the failure of the main core roller is caused by increased brittleness by excessive C content,structure segregation and fatigue defects.

关 键 词：辗环机 5CrNiMo主芯辊 断裂 应力集中 

分 类 号：O657[理学—分析化学]