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 (5): 31-33.

• 工艺技术 • 上一篇    下一篇

铁水预处理-80 t LD-RH-LF-CC生产流程对管线钢夹杂物的影响

王国承1, 黄 浪2   

  1. 1. 江西理工大学材料与化学工程学院,赣州 341000;
    2. 新余钢铁公司,新余 338001;
  • 收稿日期:2009-03-12 出版日期:2009-10-01 发布日期:2022-11-21
  • 作者简介:王国承(1977-),博士,讲师,钢铁冶金工艺研究。

Effect of Metal Pretreatment-80 t LD-RH-LF-CC Process Flow on Inclusion in Pipeline Steel

Wang Guocheng1 , Huang Lang2   

  1. 1. School of Material and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000;
    2. Xinyu lron and Steel Co,Xinyu 338001;
  • Received:2009-03-12 Published:2009-10-01 Online:2022-11-21

摘要: 通过鱼雷罐铁水喷粉脱硫处理,转炉加低硫废钢、出钢挡渣和加Si-Fe、Mn-Fe脱氧,控制终点[C]0.026%~0.030%,RH脱气处理和加Mn-Fe合金化,LF高碱度渣精炼和喂Ca线冶炼管线钢(%:0.039~0.042C、1.56~1.62Mn、0.01Ti、0.05Nb、0.03V)。检验结果表明,生产管线钢铸坯中的硫含量为(10~18)×10-6,T[O]30×10-6,铸坯中大部分夹杂物尺寸≤40μm,主要夹杂物为钙铝酸盐,Al2O3夹杂和单独存在的MnS夹杂很少,有利于提高管线钢抗HIC(氢致开裂)性能。

关键词: LD-RH-LF, 管线钢, 洁净度, 夹杂物

Abstract: The pipeline steel(%:0.039~0.042C,1.56~1.62Mn,0.01Ti,0.05Nb,0.03V) was melted by torpedo desulfurization,adding low sulphur scrap in LD,LD tapping with slag stopper and adding deoxidizer Si-Fe and Mn-Fe and controlling end [C] 0.026%~0.030%,RH degassing treatment and alloying added Mn-Fe,LF refining with high basicity slag and feeding Ca wire.Examination results showed that in cast billet of pipeline steel the sulphur content was (10~18)×10-6,the T[O]=30×10-6,the size of most inclusions ≤40 μm,and the main inclusion was calcium aluminate with few Al2O3 and individual MnS being available to increase the resistance on hydrogen-induced cracking (HIC).

Key words: LD-RH-LF, Pipeline Steel, Cleanliness, Inclusions