汽车用冷轧高强钢DP980边裂分析与控制  

EDGE CRACK ANALYSIS AND CONTROL OF COLD ROLLED HIGH STRENGTH STEEL DP980 FOR AUTOMOBILE

作　　者：安亮 薛仁杰 苏振军 An Liang;Xue Renjie;Su Zhenjun(Technical Center of HBIS Group Hansteel Company,Handan,Hebei,056015)

机构地区：[1]河钢集团邯钢公司技术中心,河北邯郸056015

出　　处：《河北冶金》2019年第1期52-56,共5页Hebei Metallurgy

摘　　要：介绍了高强钢DP980冷轧边裂缺陷的特征,并分析了边裂产生的原因及机理。结果表明:DP980钢在层流冷却尤其是卷取后,边部冷速过快造成晶粒细小,大量马氏体及马奥岛等硬相组织形成,从而导致其在冷轧过程中因边部塑性低而产生边裂。通过增设边部加热器、加装保温罩,优化冷轧轧机张力与压下率分配,有效地降低了边裂发生率。The characteristics of edge crack defect of high strength steel DP980 cold rolled steel are introduced, and the causes and mechanism of edge crack are analyzed. The results show that, the excessive edge cooling rate of DP980 steel after laminar cooling, especially coiling, resulas in the fine grains and a large number of hard phase structure such as martensite and MA island, which leads to edge crack due to low edge plasticity during cold rolling process. By adding edge heater and heat insulation cover, optimizing the tension and reduction ratio distribution of cold rolling mill, the occurrence rate of edge crack is effectively reduced.

关 键 词：DP980钢 冷轧 边裂 马氏体 边部加热 轧机张力 压下率 

分 类 号：TG142.1[一般工业技术—材料科学与工程]