3500mm炉卷轧机支承辊断裂原因分析  

Analysis on the Cause of Backup Roll for the 3500mm Steckel Mill

作　　者：杨萍[1] 陈先毅[1] 党淑娥[2] 

机构地区：[1]中国第二重型机械集团公司大型铸锻件研究所,四川618013 [2]太原科技大学材料科学与工程学院,山西030024

出　　处：《大型铸锻件》2014年第1期27-33,共7页Heavy Casting and Forging

摘　　要：采用低倍酸洗、金相检查、扫描电镜、能谱分析等手段,对使用初期断裂的3 500 mm炉卷轧机支承辊断口进行分析。结果表明,较大的残余应力与各类夹杂物及碳化物聚集分布是造成该件特大支承辊断裂的主要原因。By means of low power pickling, metallographic examination, scanning eleclron microscope, and energy spectrum analysis etc, the fracture on the backup roll for the 3 500 mm Steekel Mill occurred in the initial service stage has been analyzed. The results indicate that relatively big residual stress and different kinds of inclusion as well as the carbide aggregated distribution are the major cause of the fracture on this extra large back up roll.

关 键 词：支承辊 断裂 夹杂物 碳化物聚集 

分 类 号：TG156.3[金属学及工艺—热处理]