GCr15轴承钢初轧坯表面纵裂纹的分析  

An Analysis on Surface Longitudinal Crack of GCr15 Bearing Steel Bloom

作　　者：赵航[1] 褚翰林[1] 

机构地区：[1]钢铁研究总院,北京100081

出　　处：《特殊钢》2002年第6期52-53,共2页Special Steel

基　　金：国家技术开发项目“高质量无表面裂纹的铁路、汽车等用轴承滚动体用GCr15钢的开发和应用”的研究内容,项目编号KF-94-04-04-01

摘　　要：分析了由 2 .3tGCr1 5高碳铬轴承钢铸锭轧成 1 40mm×1 40mm初轧坯表面纵裂纹的形成原因 ,得到的结果表明 :初轧时由于第一道次孔型内一个方向上压下量过大 ,使轧件高宽比太大而产生该种裂纹。改进初轧工艺后 ,即消除了该种裂纹。The surface longitudinal crack forming cause of 140 mm×140 mm bloom cogged down from 2.3 t GCr15 high carbon chromium bearing steel ingot has been analyzed. The obtained results show that the heavy reducing in one direction of cogged ingot in first pass to make large height\|width ratio of rolled piece results in the formation of bloom surface longitudinal crack. With improved cogging down procedure this kind of crack has been eliminated.

关 键 词：GCR15 轴承钢 初轧坯 表面纵裂纹 分析 

分 类 号：TG335[金属学及工艺—金属压力加工]