摘要
TT610L汽车大梁钢板经冷弯加工时在折弯部位外侧出现裂纹,为查找开裂原因,对试验钢进行了力学性能、OM、SEM及EDS分析.结果表明:对沿厚度方向开裂的试样来说,其夹杂物主要为Al2O3和SiO2,对表皮开裂的试样来说,其夹杂物主要为SiO2,由于这些夹杂物的异常偏聚造成了TT610L大梁钢的冷弯开裂.通过连铸工艺的优化,稳定了拉速,有效地解决了试验钢冷弯裂纹开裂问题.
Cracks were often found on TT610L steel plates for chassis frame during cold bending.A causal analysis was therefore made via chemical composition,testing for mechanical properties,optical microscopy,SEM and EDS.The results showed that the cold bending cracks along thickness of TT610L steel plate specimens are mainly caused by the Al2O3 and SiO2 inclusions in the steel,while the cracks on plate surface are mainly caused by the SiO2 inclusion.The abnormal aggregation of these inclusions is just the cause of cold bending cracks.The problem of cold bending cracks has been solved efficiently by optimizing the continuous casting process and stabilizing the continuous rolling speed.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第6期812-815,共4页
Journal of Northeastern University(Natural Science)
基金
国家高技术研究发展计划项目(2003AA33G010)
中央高校基本科研业务费资助项目(N090307001)
关键词
TT610L
大梁钢
冷弯开裂
夹杂物
连铸
TT610L
steel plate for chassis frame
cold bending crack
inclusion
continuous casting
