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 ›› 2008, Vol. 29 ›› Issue (5): 45-46.

• 工艺技术 • 上一篇    下一篇

40MnB合金钢硼含量的控制

郑桂芸,翟正龙,戈文英,张 伟   

  1. 莱芜钢铁股份有限公司,莱芜 271104
  • 收稿日期:2008-03-30 出版日期:2008-10-01 发布日期:2023-01-06
  • 作者简介:郑桂芸(1972-),女,硕士,工程师,1997年东北大学毕业,优特钢新产品与新工艺研发

Control of Boron Content in Alloy Steel 40MnB

Zheng Guiyun , Zhai Zhenglong , Ge Wenying  ,  Zhang Wei   

  1. Laiwu lron and Steel Co Ltd , Laiwu 271104
  • Received:2008-03-30 Published:2008-10-01 Online:2023-01-06

摘要: 莱钢特钢厂用50 t电弧炉-LF(VD)工艺生产40MnB钢。结果表明,通过保持LF精炼渣的渣碱度3.0~5.5,喂Al线,并在LF精炼末期喂硅钙线,扒渣后50 Pa VD处理35~40 min,VD后喂Al线,再喂钛线,用铝皮包裹FeB20C0.5-A硼铁插入钢水中,软吹氩,硼铁中硼的回收率为65%~75%,钢中硼含量为0.001 8%~0.002 5%,钢中氧含量≤20×10-6,氮含量≤80×10-6

关键词: 40MnB钢, EAF-LF(VD), 硼含量控制

Abstract: The steel 40MnB is produced by 50t EAF-LF(VD) process at Special Steel Plant,Laiwu Steel.Results showed that with insuring refining slag basicity 3.0~5.5,feeding Al wire,then feeding silicon-calcium wire in LF refining end phase,skimming and 50 Pa VD treated for 35~40 min,after VD feeding Al wire and titanium wire,and inserting ferroboron FeB20C0.5-A cladding of aluminium sheet into liquid steel and soft argon blowing,the yield of boron of ferroboron was 65%~75%,boron content in steel was 0.0018%~0.0025%,and oxygen content and nitrogen content in steel were respectively ≤20×10-6 and ≤80×10-6.

Key words: Steel 40MnB, EAF-LF(VD), Control of Boron Content