异形坯生产耐候钢表面横裂纹的控制与改善  

Control and Improve Surface Transverse Cracks of Weathering Steel Manufactured with Shaped Blank

作　　者：史超[1,2] 董方[1] 卜向东[3] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古包钢钢联股份有限公司炼钢厂,内蒙古包头014010 [3]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2016年第2期27-29,共3页Science & Technology of Baotou Steel

摘　　要：采用异形坯试生产耐候钢Q420NQR1时铸坯存在严重的表面横裂纹,导致铸坯切废。通过优化二冷制度、提高拉坯速度、窄成分控制,表面横裂纹得到了有效的控制,铸坯表面质量明显改善。In the trial production of weathering steel Q420NQR1 with shaped blank,there are serious surface transverse cracks so that the slab is miscut.They are effectively controlled through optimizing secondary cooling scheme,improving the casting speed and controlling narrow composition so that the surface quality of slab is improved obviously.

关 键 词：Q420NQR1 异形坯 表面横裂纹 

分 类 号：TF777[冶金工程—钢铁冶金]