轻压下改善重轨钢铸坯成分均匀性的生产试验  

Pilot Production with Dynamic Soft Reduction to Improve Composition Uniformity in Cast Bloom of Heavy Rail Steels

作　　者：李峰[1] 刘平[1] 白月琴[1] 史凤武[1] 董珍[1] 张家泉[2] 

机构地区：[1]包头钢铁集团公司技术中心,包头014010 [2]北京科技大学,北京100083

出　　处：《特殊钢》2009年第3期28-30,共3页Special Steel

摘　　要：包钢在5^#280mm×380mm方坯连铸机上安装了一套国产动态轻压下设备。对重轨钢U71Mn和U75V进行了一年多的生产试验。结果表明，在合理工艺条件下，采用轻压下可显著改善重轨钢的中心碳偏析，横断面中心碳偏析指数≤1．08，铸坯纵向中心线碳偏析指数波动明显减小，钢轨成分偏差也随之减小。A set of domestic dynamic soft reduction equipment was installed at No5 280 mm × 380 mm bloom concasting line at Baotou Steel, by which the pilot production for heavy steels U71Mn and U75V has been carried out for more than one year. Results showed that with suitable process conditions, the central carbon segregation in heavy rail steels improved obviously by using soft reduction technology ： the index of central carbon segregation in cross section of bloom was ≤ 1.08, the fluctuation of index of carbon segregation along longitudinal central line of bloom appreciably decreased and the chemical composition deviation of steel rail also decreased.

关 键 词：大方坯连铸 动态轻压下 碳偏折指数 碳元素偏差指数 

分 类 号：TF777[冶金工程—钢铁冶金] TQ153.12[化学工程—电化学工业]