摘要
通过对St12冷轧板制管过程中出现麻点缺陷处的形貌、微观化学成分和组织的分析,得出其原因是制管加工变形量正好位于钢坯(由IF钢改判St12)的临界变形区域,因此钢管退火后晶粒异常粗大,拉拔时形成了麻点缺陷。采取使制管加工变形量避开材料临界变形区域的措施,可有效预防麻点缺陷的产生。
The causes and preventive measures of pockmark in the process of making tube with cold rolled sheet were investigated.Results show that deformation degree in making tube with St12 produced by substandard IF steel is just in its critical deformation region,which causes extraordinary coarse grains after annealing and finally forms the pockmark in drawing.Pockmark is effectively prevented by making deformation degree avoid critical deformation region.
出处
《轧钢》
北大核心
2010年第5期49-52,共4页
Steel Rolling
关键词
冷轧板
焊管
麻点
临界变形量
cold rolled sheet
welded tube
pockmark
critical deformation
