热轧7.5mm S700MC超高强带钢剪切横向断裂分析  

TRANSVERSE FRACTURE ANALYSIS OF HOT ROLLING 7.5mm S700MC ULTRAHIGH STRENGTH STRIP STEEL

作　　者：李正团[1,2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]河钢集团承钢公司钒钛冷轧薄板有限公司,河北承德067002

出　　处：《河北冶金》2017年第6期67-69,共3页Hebei Metallurgy

摘　　要：针对承钢公司1780热连轧机组开发的7.5 mm S700MC超高强带钢剪切后出现的横向断裂现象,通过化学成分、力学性能测试光学显微镜(OM)和扫描电镜(SEM)方法,分析了带钢产生断裂的原因。结果表明,由于带钢终轧后头部未进行快冷,使基体组织晶粒粗大和韧塑性较差,从而使带钢在剪切后发生横向脆断。Aiming at the transverse fracture of hot rolling 7.5mm S700MC ultrahigh strength strip steel developed by 1780 hot continuous rolling unit of Chensteel Company, the reasons are analyzed by chemical composition, mechanical property, OM and SEM. The result shows that the main cause of transverse break is the large grain and poor ductility of matrix, for the head of the strip is not subjectcd to rapid cooling after the end rolling.

关 键 词：热轧 超高强带钢 断裂 分析 

分 类 号：TG335.5[金属学及工艺—金属压力加工]