ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (3): 42-43.

• 工艺技术 • 上一篇    下一篇

[P]对低碳Si-Mn-B钢170 mm x1 650 mm铸坯断裂的影响

王勇, 苏春霞, 张起生   

  1. 鞍钢股份有限公司技术中心,鞍山114001
  • 收稿日期:2008-11-19 出版日期:2009-06-01 发布日期:2022-11-24
  • 作者简介:王勇(1972-),男,硕士,高级工程师,1995年东北大学毕业,钢铁新产品的研制与开发。

Effect of [ P] on Fracture of 170 mm x 1 650 mm Cast Slab of Low Carbon Si-Mn-B Steel

Wang Yong, Su Chunxia ,Zhang Qisheng   

  1. Technical Center, Anshan Iron & Steel Co Ltd, Anshan 114001
  • Received:2008-11-19 Published:2009-06-01 Online:2022-11-24

摘要: 低碳Si-Mn-B钢(%:0.16~0.17C、1.10~1.12Si、1.80~1.85Mn、0.0010~0.001 1 B)部分连铸板坯在多次搬运后发生横向断裂。对断裂与未断裂铸坯进行连铸工艺、铸坯成分、组织和力学性能的分析表明,二者连铸工艺相同,断裂板坯S含量为0.004%,P含量为0.025%,中间裂纹1.5级,组织中有穿晶裂纹,未断裂板坯S含量0.004%,P含量0.008%,中间裂纹0级,组织中未发现显微裂纹,说明板坯中P含量偏高导致板坯多次搬运后断裂。

关键词: 低碳钢, 连铸板坯, P含量, 中间裂纹, 断裂

Abstract: Some of cast slab of low carbon Si-Mn-B steel (% : 0. 16 ~ 0. 17C, 1. 10 ~ 1. 12Si, 1. 80 ~ 1. 85Mn, 0.001 0 ~ 0. 001 1 B) fractured in cross section after multiple conveying. The analysis on cast process, chemical coniposi- tion, structure and mechanical properties of slab showed that cast process for both fractured and un-fractured slab batch was same: for fractured slab, its S content was 0. 004% , P content was 0. 025% , middle crack rating 1. 5 and there was Irans- granular crack in structure ; for un-fractured slab, its S content was 0. 004% , P content was 0. 008% , middle crack rating 0 and the micro-crack wasn't observed in structure. The analysis results showed that higher P content in steel led to slab fracture, after multiple conveying.

Key words: Low Carbon Steel, Cast Slab, P Content, Middle Crack, Fracture