液芯大压下对薄板坯低倍组织的影响  

Influence of big stroke liquid core reduction on microstructure of slab

作　　者：陈友根[1,2] MUELLER Juergen 鲍磊 张宗宁 

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心 [2]马钢股份有限公司第一钢轧总厂 [3]西马克公司炼钢连铸技术部

出　　处：《炼钢》2013年第4期57-61,共5页Steelmaking

摘　　要：通过在马钢股份有限公司CSP连铸连轧生产线上进行了液芯大压下的工业性试验,研究了最大液芯压下量从原设计的20 mm增加到35 mm时对低碳钢、中碳钢和硅钢低倍组织的影响。研究结果表明:在试验研究的范围内,压下量对铸坯内裂纹和三角区裂纹没有明显影响;液芯大压下能够改善铸坯中心偏析,随着压下量的增加,中心偏析程度降低,对中碳钢Q235B和硅钢MGW1300效果更明显。Through the industrial experiments on the thin slab continuous casting and rolling production line（CSP） for the big stroke liquid core reduction in Masteel. The relationship between the microstructure of the slab and the value of liquid core reduction for low carbon steel, medium carbon steel and silicon steel have been researched when the maximum value of liquid core reduction increased to 35 mm from the original design of 20 mm. The results show that,within the scope of the trials study ,the value of the liquid core reduction have no significantly influence on internal cracks and triangle cracks, the big stroke liquid core reduction can improve the central segregation, the degree of center segregation is improved with increasing reduction, especially for medium carbon steel Q235B and silicon steel MGW1300.

关 键 词：CSP 液芯压下 低倍 偏析 裂纹 

分 类 号：TF777.7[冶金工程—钢铁冶金]