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 ›› 2019, Vol. 40 ›› Issue (2): 49-52.

所属专题: 齿轮钢 夹杂物控制

• 工艺技术 • 上一篇    下一篇

改善60 t EAF-LF-VD-CC流程冶炼齿轮钢FAS3420H洁净度的研究

安杰1, 李涛1, 李刚2, 冯桂萍2, 张妍3   

  1. 抚顺特殊钢股份有限公司1总工办;2技术中心;3中心试验室,抚顺113001
  • 收稿日期:2018-10-11 出版日期:2019-04-01 发布日期:2022-05-19
  • 作者简介:安 杰(1985-),男,硕士 (2011年辽宁科技大学),工程师, 2008年河北经贸大学(本科)毕业,特殊钢冶炼工艺技术研 发°
  • 基金资助:
    国家重点研发计划项目(2016YFB0300102)

Study on Improving Cleanliness of Gear Steel FAS3420H Steelmaking by 60 t EAF-LF-VD-CC Flow Sheet

An Jie1, Li Tao1, Li Gang2, Feng Guiping2 , Zhang Yan3   

  1. 1 Chief Engineer Office;
    2 Technology Center;
    3 Central Laboratory,
    Special Steel Shares Co. ,Ltd. ,FuShun 113001
  • Received:2018-10-11 Published:2019-04-01 Online:2022-05-19

摘要: 以抚顺特钢一炼钢厂的生产数据为实践依据,以改善汽车齿轮钢FAS3420H的洁净度为目的。使用扫描电镜分析水口结瘤物和棒材中氧化物夹杂的化学成分,确定了通过减少钢中的B类夹杂物来解决水口结瘤问题的方向。通过优化电弧炉供氧曲线降低钢水氧化性、优化精炼炉渣流动性和碱度提高夹杂物吸附能力等措施,解决了连铸过程水口结瘤问题,同时达到棒材的氧含量平均值为9.2×10-6,B类夹杂物B细不高于1.0级、B粗不高于0.5级的控制水平。

关键词: 齿轮钢, FAS3420H, 601 EAF-LF-VD-CC流程, 洁净度, 夹杂物

Abstract: On the basis of actual production data in the first steelmaking plant of FuSteel,the objective is to improve cleanliness of automobile gear steel FAS3420H. The nozzle clogging and oxide inclusion are analysized by using SEM and the aim of solving nozzle clogging is definited, that is decreasing B inclusion in steel. Several measures were implemented, such as optimizing oxygen supply curve of EAF to reduce liquid steel oxidation, optimizing fluidity and basicity of LF slag to increase adsorption capacity of inclusion. The problem of nozzle clogging is solved during production process of continuous casting. The average oxygen mass fraction in production can reach to 9. 2 x 10~6, B thin series rating of inclusions is no more than 1. 0 and B coarse series rating of inclusions is less than or equal to 0. 5 in bar.

Key words: Gear Steel, FAS3420H, 60 t EAF-LF-VD-CC Flow Sheet, Cleanliness, Inclusion