Q235宽厚板连续铸锭开裂原因分析  

Study of Crack in Continuous Casting Ingot of Q235 Wide Plate

作　　者：李红英[1] 丁常伟[1] 龚美涛[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热加工工艺》2006年第1期58-60,共3页Hot Working Technology

摘　　要：通过对存在宏观裂纹的Q235宽厚板连续铸锭进行显微组织、非金属夹杂物分析和SEM能谱分析,发现铸锭中存在大量的非金属夹杂物。这些非金属夹杂物是铸锭开裂的主要内因。并且通过热模拟实验,验证了锭坯中的裂纹是连铸过程中在温度950℃以上产生的热裂纹。The continuous casting ingot of Q235 wide plate was investigated by the optical microscopy, scanning electron microscopy and energy spectrum analysis. It was found that lots of Non-metallic inclusions exist in the ingot, and they are the internal cause for cracking of the ingot. Based on the results of the thermal simulation experiment, it was confirmed that cracks in the ingot were heat cracks formed in Ihe temperature of more than 950℃.

关 键 词：Q235宽厚板 连续铸锭 热裂纹 非金属夹杂物 热模拟 

分 类 号：TG142.15[一般工业技术—材料科学与工程]