连铸连轧集装箱板冷弯裂纹的产生原因  

Formation Cause of Cold Bending Crack of Container Plate Manufactured by Continuous Casting and Rolling

作　　者：鲍思前[1,2] 赵刚[1] 陈江锋[1] 李磊[1] 毛新平[3] 李柯新[3] 陈麒琳 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081 [2]广州钢铁企业集团CSP应用技术研究所,广州510730 [3]广州珠江钢铁有限责任公司,广州510730

出　　处：《机械工程材料》2011年第8期9-11,15,共4页Materials For Mechanical Engineering

摘　　要：某连铸连轧集装箱板综合力学性能良好、晶粒均匀,但在冷弯检验时厚规格集装箱板(不小于3.5 mm)易出现冷弯裂纹,对冷弯裂纹试样采用光学显微镜和扫描电镜进行观察,分析了裂纹产生的原因。结果表明:热轧成品板中存在的皮下微裂纹导致了冷弯裂纹的产生,这种皮下微裂纹在铸坯中就已形成,其原因与铜元素富集有关。A continuous casting and rolling container plate performed good mechanical properties and uniform fine grain, but the thick container plate （≥3.5 mm） was easy to crack in the cold bending test. The cold bending crack specimens were observed by optical microscopy and scanning electron microscopy and the formation causes of crack were analyzed. The results show that the cold bending crack was caused by subcutaneous microcrack in hot rolling plate, and this subcutaneous microcrack came from casting blank, the cause was in relation to copper element enrichment.

关 键 词：连铸连轧 集装箱板 冷弯裂纹 

分 类 号：TG142.1[一般工业技术—材料科学与工程]