连铸坯凝固偏析的原位统计分布分析

特殊钢 ›› 2007, Vol. 28 ›› Issue (1): 13-15.

连铸坯凝固偏析的原位统计分布分析

薛正良¹，左都伟²，齐江华¹，高俊波¹，蒋德阳²，王贵容²，汤伟²

1武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室，武汉430081;
2湘潭钢铁集团公司，湘潭411101

收稿日期:2006-06-26 出版日期:2007-01-01 发布日期:2023-01-12
作者简介:薛正良(1962-),男，博士，教授，系主任，武汉钢铁学院毕业，从事纯净钢冶炼理论与工艺、氧化物冶金和直接还原技术研究。

Analysis of Original Position Statistic Distribution on Solidification Segregation of Cast Billet

Xue Zhengliang¹， Zuo Duwei², Qi Jianghua¹， Cao Junbo¹， Jiang Deyang²， Wang Guirong²，Tang Wei²

1 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081;
2 Xiangtan Iron and Steel Group Co Ltd, Xiangtan 411101

Received:2006-06-26 Published:2007-01-01 Online:2023-01-12

摘要/Abstract

摘要： 应用金属原位统计分布分析技术研究了40Cr钢(%:0.38～0.40C、0.90~0.91Cr、0.015～0.029P、 0.009~0.014S)240 mm×240 mm连铸坯中C、S、P和Al的宏观偏析规律。研究表明，在铸坯45%～63%等轴晶率下中间包钢水过热度(5~32 ℃)对C的宏观偏析没有显著影响，但对S、P宏观偏析产生明显影响。S呈中心正偏析，P呈中心负偏析，低过热度(5℃)不能减轻S和P的偏析程度。Al元素中心正偏析主要是Al₂0₃夹杂向连铸坯中心聚集所致。

关键词: 连铸坯,凝固偏析, 原位统计分布分析

Abstract: The macrosegregation law of C,S,P and Al in 240 mm×240 mm cast billet of steel 40Cr(0.38 ~ 0.40C,0.90~0.91Cr,0.015～0.029P,0.009~0.014S)has been studied by the technology of original position statistic distribution analysis(OPA).The study indicated that with 45%～63% equiaxial crystal rate in billet, there has not any effect of overheating temperature(5~32 ℃)of molten steel in tundish on macrosegregation of C, but there has an obvious effect on macrosegregation of S and P. The S presents center positive segregation, P presents center negative segregation, and low overheating temperature(5℃)could not decreases S and P segregation.Al₂O₃ inclusions concentrated at center of cast billet leads to Al element center positive segregation.

薛正良, 左都伟, 齐江华, 高俊波, 蒋德阳, 王贵容, 汤伟. 连铸坯凝固偏析的原位统计分布分析[J]. 特殊钢, 2007, 28(1): 13-15.

Xue Zhengliang, Zuo Duwei, Qi Jianghua, Cao Junbo, Jiang Deyang, Wang Guirong, Tang Wei. Analysis of Original Position Statistic Distribution on Solidification Segregation of Cast Billet[J]. Special Steel, 2007, 28(1): 13-15.