5J1580G双金属带材表面裂纹的形成原因分析

Analysis of the Cause of Surface Crack Formation on 5J1580G-Bimetal Strip

经过工业性试验和多种手段的实验分析,证明了5J1580G双金属带材表面裂纹是由于Ni_(20)Mn_6热轧板在加热过程中过热现象,造成了热轧板表面形成“鱼鳞斑”状的表面缺陷,由于缺陷较深,打磨不净,在冷轧过程中,这些缺陷扩展而形成表面裂纹。

By both Industrial test and multiple-means experimental analysis, the surface crack of 5J1580G-btmetal strip is proved to be referred to the overheat during hot-rolling process of NlzoMne sheet, which causes fish-scale-like defects on th surface of th sheet. These defects, being deeper and not removed due to Incomplete polishing, expanded Into surface crack during the subsequent cold-rolling.