高碳钢内部偏析优化实践  

Practice of Optimizing Internal Segregation in High Carbon Steel

作　　者：赵文涛[1] 朱晓雷 宁生龙 李超[1] 马宁[1] 田永久 李志刚[1] ZHAO Wentao;ZHU Xiaolei;NING Shenglong;LI Chao;MA Ning;TIAN Yongjiu;LI Zhigang(Bayuquan Branch of Angang Steel Co.,Ltd.,Yingkou 115007,Liaoning,China;State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan 114009,Liaoning,China;Ansteel Iron&Steel Research Institutes,Anshan 114009,Liaoning,China;ChaoyangIron&Steel Co.,Ltd.of Ansteel Group Cor.,Ltd.,Chaoyang 122000,Liaoning,China)

机构地区：[1]鞍钢股份有限公司鲅鱼圈钢铁分公司,辽宁营口115007 [2]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [3]鞍钢集团钢铁研究院,辽宁鞍山114009 [4]鞍钢集团朝阳钢铁有限公司,辽宁朝阳122000

出　　处：《鞍钢技术》2022年第3期47-51,共5页Angang Technology

摘　　要：分析了高碳钢表面开裂原因,认为是内部元素偏析导致。通过采取提高铸机辊缝控制精度、缩小铸机拉速波动范围和优化动态轻压下工艺参数等措施后,高碳钢铸坯中心偏析情况得到有效改善,B0.5级以内的比例由72%提高到92%,高碳高锰钢碳偏析度由1.34降至1.10以下,锰偏析度由1.27降至1.08以下。Based on the analysis on the causes leading to cracks on the surface of a high carbon steel,it was concluded that the cracks was caused by internal element segregation in the steel.After taking such measures as improving the control accuracy of roll gaps in a casting machine,reducing the fluctuation range of the casting speed and optimizing the parameters for dynamic soft reduction process,the central segregation state in the steel was effectively improved.So the ratio less than B0.5 level was increased to 92%from 72%,carbon segregation degree of high carbon high manganese steel was reduced to less than 1.10 from 1.34 and manganese segregation degree was reduced to less than 1.08 from 1.27.

关 键 词：高碳钢 中心偏析 拉速 动态轻压下 

分 类 号：TF777[冶金工程—钢铁冶金]