Ф430mm圆坯表面质量问题及改善措施  

Problems and Improvement Measures for Surface Quality of Ф430 mm Round Billet

作　　者：辛广胜[1] 邬美强 樊精彪[1] 

机构地区：[1]内蒙古包钢钢联股份有限公司炼钢厂,内蒙古包头014010

出　　处：《包钢科技》2016年第3期1-3,7,共4页Science & Technology of Baotou Steel

摘　　要：包钢Ф430 mm圆坯经过热轧生产的无缝钢管大批量出现外结疤,通过热酸及裂纹分析发现是因为圆坯表面存在着微裂纹,在随后的热轧生产中形成外结疤,针对Ф430 mm圆坯表面出现微裂纹的问题,通过调整炼钢连铸工艺和钢种成分,制订出相应的改进措施。圆坯表面质量得到明显改善,经过热轧生产后,钢管成材率得到提高。There are external scabs on seamless steel tubes of Baotou Steel manufactured by Ф430 mm round billet with hot rolling production on a large scale. There are microcracks on the surface of round billet through the analysis of hot acid and crack,then the external scabs are formed in hot rolling production. The corresponding improvement measures are worked out through adjusting the continuous casting process and components of steel aiming at the microcracks. As a result,the surface quality of round billet and the yield of steel tube with the hot rolling production are obviously improved.

关 键 词：Ф430mm圆坯 连铸工艺 高温塑性 

分 类 号：TF777[冶金工程—钢铁冶金]