含硼钢铸坯表面裂纹产生原因分析  

Cause Analysis on Surface Crack of Casting Blank with Boron Containing Steel

作　　者：靳燕[1] 刘莉[1] 韩春鹏[1] Jin Yan;Liu Li;Han Chun-peng(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2020年第4期41-43,共3页Science & Technology of Baotou Steel

摘　　要：文章介绍了铸坯角部裂纹产生的原因,通过金相、扫描电镜等检测技术分析,得出氮化硼沿晶析出,弱化了原始奥氏体晶界,在后续受到矫直力的作用下,沿晶界产生裂纹。In this paper,the cause for the crack at corner of casting blank is introduced.It is found out that the boron nitride precipitates along grain boundary and weakens the original austenite grain boundary as well as the crack is produced along grain boundary with the subsequent effects of straightening force by analyzing with such detecting techniques as metallographic examination and scanning electron microscopy.

关 键 词：铸坯 氮化硼 裂纹 

分 类 号：TG335.5[金属学及工艺—金属压力加工]