异型坯腹板纵裂纹产生原因分析  

Analysis of Causes of Longitudinal Cracks in Web Plates of Shaped Blank

作　　者：张婕[1] 王淑华[1] 王学新[2] 孙启家[2] 

机构地区：[1]莱芜钢铁集团有限公司技术研发中心 [2]莱芜钢铁集团有限公司炼钢厂

出　　处：《莱钢科技》2006年第5期36-39,共4页Laigang Science & Technology

摘　　要：针对异型坯的特点，通过对异型坯的凝固特性和应力分析，得出异型坯腹板纵裂纹产生的原因：冷却不均匀造成的温度分布不均匀以及各种复杂应力的集中是产生纵裂纹的根源，结晶组织粗大是产生纵裂纹的诱因，钢中成分和保护渣的性能是纵裂纹形成的重要影响因素。Through analyses of solidification characteristics and stress of shaped blank, causes of longitudinal cracks in web plates of shaped blank were found out. Uneven temperature distribution caused by uneven cooling and the concentration of various complicated stresses are the origin of longitudinal cracks, coarse crystalline structures are their inducements and the compositions of steel and performance of protecting slag are important factors in the formation of longitudinal cracks .

关 键 词：异型坯 纵裂纹 应力 保护渣 

分 类 号：TF777.1[冶金工程—钢铁冶金]