冷连轧机工作辊剥落失效分析及改进措施  

Spalling Failure Analysis and Improvement of Work Roll for Cold Strip Mill

作　　者：栗晓[1] 吴国胜[2] 

机构地区：[1]武汉工程职业技术学院 [2]武汉钢铁(集团)公司技术中心,武汉430080

出　　处：《武汉工程职业技术学院学报》2006年第1期10-13,22,共5页Journal of Wuhan Engineering Institute

摘　　要：通过对某厂1700冷连轧机工作辊剥落事故进行调查和断口特征分析,发现该轧机工作辊出现由工作辊内部线状开裂引起的剥落;对剥落工作辊进行取样检验,分析其化学成分、金相组织、显微硬度、残余奥氏体含量和微观断口,证实工作辊辊身表层基体组织不符合技术要求、显微硬度和残余奥氏体含量过高是导致工作辊内裂剥落的主要原因,进而实施改进措施,防止事故再次发生。Through accident investigation and analysis on fracture characteristics of work roll, spalling from barrel internal thread-like crack was found. Samples were then taken for examination on chemical analysis, microstructure, micro hardness, micro-fracture on those spalled work rolls. The examination demonstrates that the spalling was mainly caused by disagreement of barrel surface with technological requirements,and higher micro-hardness, higher residual austenite amount. Some improvements were made and no spalling has occurred ever since.

关 键 词：冷轧工作辊 内裂剥落 金相组织 残余奥氏体 微观断口 

分 类 号：TG333.17[金属学及工艺—金属压力加工]