SWCr8热轧板表面裂纹原因分析  

Analysis of Surface-cracks of SWCr8 Hot-rolling Plate

作　　者：张恒[1] 赵欣[1] 续维[1] 王庆良[2] 

机构地区：[1]宝钢特钢有限公司,上海200940 [2]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《徐州工程学院学报（自然科学版）》2015年第2期76-80,共5页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家科技支撑计划项目(2013BAEL3B00);国家自然科学基金项目(51275514)

摘　　要：针对SWCr8冷作模具钢在热轧过程中出现表面裂纹的问题,选取典型缺陷试板,采用金相、扫描电镜及能谱等分析手段对表面裂纹进行解剖分析.结果表明,SWCr8热轧板表面裂纹出现的原因是连铸坯本身存在裂纹、卷渣缺陷以及热送温度过低所导致的坯料应力开裂.The surface cracks of SWCr8 plate were found during the hot‐rolling process .The typical de‐fect plate sample was selected to study by means of microscopy ,scanning electron microscopy and energy spectrum analysis .The results showed that the surface crack of SWCr8 hot‐rolling plate was caused by the surface or sub‐surface cracks of the continuous casting slab ,slag entrapment defects and the stress cracks induced by low hot charging temperature .

关 键 词：SWCr8 热轧板 表面裂纹 

分 类 号：TG333.71[金属学及工艺—金属压力加工]