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 ›› 2010, Vol. 31 ›› Issue (3): 33-34.

• 工艺技术 • 上一篇    下一篇

90 t LF精炼0Cr18Ni9不锈钢的夹杂物控制工艺实践

范新智   

  1. 太钢不锈钢股份有限公司技术中心,太原030003
  • 收稿日期:2009-11-02 出版日期:2010-06-01 发布日期:2022-11-07

Processing Practice for Inclusion Controlling of Stainless Steel 0Cr18Ni9 in Refining Process of a 90 t LF

Fan Xinzhi   

  1. Technology Center, Taiyuan Iron and Steel Corp Ltd, Taiyuan 030003
  • Received:2009-11-02 Published:2010-06-01 Online:2022-11-07
  • About author:范新智(1976-),男,2000年东北大学材料与冶金学院毕业,不锈钢冶炼、连铸及不锈钢品种研发。

摘要: 叙述太钢二炼钢厂90 t LF精炼0Cr18Ni9奥氏体不锈钢时对钢中夹杂物的控制效果。工艺实践表明,钢水经VOD后,钢中氧含量为(40~55)×10-6,再经LF喂铝线0.3~1.0 kg/t时,可使钢中氧含量进一步降至(24~35)×10-6,同时钢中夹杂物数量减少40%以上;接着喂0.9~1.5 kg/t硅钙线使钢中夹杂物变性成球状,同时通过200~600 L/min氩气搅拌10~20 min和50~150 L/min氩气搅拌15~20 min,使钢中夹杂物数量进一步减少50%以上,并去除了钢中尺寸为30μm以上的夹杂物。

关键词: 90tLF, 奥氏体不锈钢, 精炼, 纯净度

Abstract: The controlling results of inclusions in steel during refining austenite stainless steel 0Cr18Crl9 in a 90 t ladle furnace at No2 steelmaking plant, Taiyuan Steel are presented. Operation practice shows that after VOD process, oxygen content in steel is (40 ~55) x 10-6 , then feeding 0. 3 ~ 1. 0 kg/t aluminum wire in LF, the oxygen content in steel further decreases to (24 ~35) x 10-6 while the amount of inclusions in steel decreases by more than 40% ; followed by feeding 0. 9 ~ 1. 5 kg/t silicon-calcium wire, the inclusions in steel are modified to spheroid, and with 200 ~ 600 L/min argon stirring for 10 ~ 20 min and 50 ~ 150 L/min for 15 - 20 min, the amount of inclusions in steel further decreases by more than 50% and the inclusions size more than 30 μm are removed from liquid steel.

Key words: 90 t LF, Austenite Stainless Steel, Refining, Cleanliness