东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (6): 812-815.DOI: -

• 论著 • 上一篇    下一篇

TT610L大梁钢冷弯裂纹原因分析

衣海龙;宋勇军;徐兆国;王国栋;   

  1. 东北大学轧制技术及连轧自动化国家重点实验室;天津铁厂;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-06-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2003AA33G010);;

Causal analysis of cold bending cracks of TT610L steel plates for chassis frames

Yi, Hai-Long (1); Song, Yong-Jun (2); Xu, Zhao-Guo (2); Wang, Guo-Dong (1)   

  1. (1) The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China; (2) Tianjin Iron Co., Shexian 056404, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-06-15 Published:2013-06-20
  • Contact: Yi, H.-L.
  • About author:-
  • Supported by:
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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.

关键词: TT610L, 大梁钢, 冷弯开裂, 夹杂物, 连铸

Abstract: 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.

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