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 ›› 2011, Vol. 32 ›› Issue (2): 44-45.

• 工艺技术 • 上一篇    下一篇

45钢矩形连铸坯中心裂纹的分析和控制

吴华杰1,  留津津2, 包燕平1, 王国新1, 魏宁2   

  1. 北京科技大学1冶金工程研究院;
    2冶金与生态工程学院,北京100083
  • 收稿日期:2010-12-05 出版日期:2011-04-01 发布日期:2022-11-10
  • 作者简介:吴华杰(1978-),男,博士,助理研究员,冶炼和连铸研究。

Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel

Wu Huajie1 , Liu Jinjin2,  Bao Yanping1 ,  Wang Guoxin1 ,   Wei Ning2   

  1. 1 Research Institute of Metallurgical Engineering;
    2 School of Metallurgical and Ecological Engineering,University of Science and Technology, Beijing 100083
  • Received:2010-12-05 Published:2011-04-01 Online:2022-11-10

摘要: 统计分析了[P]、[S]、[Mn]/[S]和钢水过热度等工艺因素对钢厂45钢(0.44%~0.50%)160 mm×200 mm矩形坯中心裂纹的影响。根据分析结果,采用控制[P]≤0.020%、[S]≤0.015%、[Mn]/[S]≥40,钢水过热度≤25℃,拉速1.8m/min时优化二冷水量等工艺措施,使中心裂纹发生率由原来的82.76%降低到22.41%,1级以上中心裂纹发生率由原来的22.41%降低到0.51%。

关键词: 45钢, 160mm×200mm矩形连铸坯, [Mn]/[S], 二次冷却

Abstract: The effect of [P] , [S] , [Mn]/[S] and process factors including superheating degree of liquid on center cracks of 160 mm x 200 mm rectangular billet of 45C Steel (0. 44% 〜0. 50% C) has been classified, counted and analyzed. According to analysis results the process measures including controlling [P]≤0. 020% , [S]≤015% , [ Mn]/ [S]≥40, superheating degree ≤25 , and optimizing secondary cooling water rate with casting speed 1. 8 m/min are a- dopted, as a result the occurring rate of center cracks decreases from original 82. 76% to 22. 41% and that more than rating 1 decreases from original 22. 41% to 0. 51% .

Key words: 45C Steel, 160 mm x200 mm Rectangular Billet, [ Mn]/[ S], Secondary Cooling