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): 25-27.

• 工艺技术 • 上一篇    下一篇

低[Al]s齿轮钢20CrMnTi的洁净度研究

王永胜1,2, 王新华1,王万军1   

  1. 1北京科技大学冶金与生态工程学院,北京100083;
    2酒泉钢铁(集团)有限公司,嘉峪关735100)
  • 收稿日期:2008-11-21 出版日期:2009-06-01 发布日期:2022-11-24
  • 作者简介:王永胜(1972-),男,博士研究生,特殊钢精炼及铸坯质量研究。
  • 基金资助:
    973新一代钢铁材料重大基础研究资助项目 (2004C13619106)

A Study on Cleanliness of Gear Steel 20CrMnTi with Low [Al]s

Wang Yongsheng1,2, Wang Xinhua1 ,  Wang Wanjun1   

  1. 1 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ;
    2 Jiuquan Iron and Steel (Group) Co Ltd, Jiayuguan 735100
  • Received:2008-11-21 Published:2009-06-01 Online:2022-11-24

摘要: 80 t LD-LF-CC工艺生产齿轮钢20CrMnTi时,[Al]s从0.030%降至0.015%可使吨钢成本降低25.8元。为不影响钢水洁净度,转炉出钢严格挡渣,出钢加入2 kg/t钢芯铝,同时加入CaO≥70%、SiO2≤5%的高碱度渣进行渣洗,吹氩喂铝线使[Al]s为0.015%。LF精炼加入石灰块和AD粉(Al+Al2O3)对炉渣改质,然后喂Ca-Si线,软吹氩≥10 min。5炉试验结果表明,改进工艺后铸坯具有较高的洁净度,T[O](14~15)×10-6,[S] 0.012%~0.015%,[P]0.012%~0.018%。

关键词: 酸溶铝, 齿轮钢20CrMnT, LD-LF, 洁净度

Abstract: With gear steel 20CrMnTi producing by 80 t LD-LF-CC process, as [Al]  s decreases from 0. 030% to 0. 015% , the production cost per ton steel shall be decreased by 25. 8 yuan. In order to un-influence the cleanliness of liquid steel, in LD tapping the slag was strictly stopped, the 2 kg/t steel-clad aluminium was added with adding high basicity slag containing ≥70% CaO and ≤5% SiO2 to carry out slag washing, argon blowing and feeding aluminium wire to [ Al ] s 0. 015% , in LF refining, lime lump and AD powder ( Al + Al2O3) were added to modify slag ingredient, then feeding Ca- Si wire and soft-blowing argon for more than 10 min. Results by 5 heats test showed that with improved process, the cast billet had higher cleanliness with ( 14-15) x 10-6T [0] , 0. 012% 〜0. 015% [S] and 0. 012% -0. 018% [P].