炼钢 ›› 2015, Vol. 31 ›› Issue (3): 27-30.

• 生产实践 • 上一篇    下一篇

电磁搅拌对管线钢板坯质量和钢板性能的影响

何航   

  1. 湖南华菱湘潭钢铁有限公司,湖南 湘潭 411101
  • 收稿日期:2014-10-23 修回日期:2014-11-12 接受日期:1900-01-01 出版日期:2015-06-05 发布日期:2015-06-08
  • 通讯作者: 何航 E-mail:hehang2003@163.com

Effect of roller EMS on slab quality and mechanical properties of linepipe plate

  • Received:2014-10-23 Revised:2014-11-12 Accepted:1900-01-01 Online:2015-06-05 Published:2015-06-08

摘要: 详细对比了辊式电磁搅拌(S-EMS)和未使用S-EMS的管线钢板坯质量和轧制后钢板性能,研究S-EMS对管线钢板坯质量和钢板性能的影响。对比结果显示:使用S-EMS后,板坯的中心偏析和疏松的显著改善,板坯中心等轴晶率由12%提高到26%。管线钢的冲击性能(-20℃)和落锤性能(-15℃)得到了显著改善,钢板的中心组织以均匀细小的针状铁素体为主,基本消除了中心条带状偏析带、粗大魏氏体和颗粒状贝氏体组织。轧制后钢板的常规冲击KV2≥350J所占比例为100%;落锤剪切面积比SA样本合格率提高了2.65%,达到了100%。

关键词: S-EMS, 管线钢, 板坯质量, 钢板性能

Abstract: The slab internal quality and the mechanical properties of linepipe plate with and without in-strand roller type electromagnetic stirring (S-EMS) were studied. The results showed that the centerline segregation and center porosity of slab macroscopic structure were improved with the proper use of S-EMS. The central equiax crystal ratio was increased from 12% to 26%. The impact properties ( -20℃) and the drop weight tear(-15℃)were improved remarkably. The detrimental segregation bandings, coarse Widmannstatten and granular Bainite structures were greatly reduced. The ratio for KV2≥350J of rolled plate samples got to 100%, the qualified rate for the shear fracture area of drop weight tear test was increased 2.65%, and got to 100%.

Key words: S-EMS, linepipe steel grade, slab quality, properties