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

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

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

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

1 Research Institute of Metallurgical Engineering；
2 School of Metallurgical and Ecological Engineering,University of Science and Technology, Beijing 100083

Received:2010-12-05 Online:2011-04-01 Published:2022-11-10

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

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

作者简介:吴华杰(1978-)，男，博士，助理研究员，冶炼和连铸研究。

Abstract

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

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

Wu Huajie , Liu Jinjin, Bao Yanping, Wang Guoxin, Wei Ning. Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel[J]. Special Steel, 2011, 32(2): 44-45.

吴华杰, 留津津, 包燕平, 王国, '魏宁. 45钢矩形连铸坯中心裂纹的分析和控制[J]. 特殊钢, 2011, 32(2): 44-45.

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

45钢矩形连铸坯中心裂纹的分析和控制

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