钢管内表面鼓包形成原因分析  

Cause Analysis of Umbos on Inner Surface of Steel Pipe

作　　者：周梦雄 刘启增 罗家华 彭自胜 

机构地区：[1]衡阳钢管(集团)有限公司,湖南衡阳421001

出　　处：《轧钢》2006年第4期26-27,共2页Steel Rolling

摘　　要：针对某次采用连铸坯生产N80-1的Φ139.70mm×7.72mm套管时部分钢管内表面出现鼓包缺陷问题进行了研究分析,发现鼓包周围存在较多、较大夹杂物。该夹杂物在钢管穿孔和连轧时在钢管内外表层形成薄片,在定径时形成鼓包。因此,减少钢中大型夹杂物含量是减少鼓包缺陷产生的主要措施。In view of forming umboss on inner surface of N80 - 1 Ф139.7mm × 7.72mm casing by casting billet, the electron microscope was applied to analyze the causes, and some large inclusions were found out around umbos.The inclusions were formed to urnbos through piercing, rolling and sizing. Therefore, the main measure of eliminating the defect was decreasing the inclusion amount.

关 键 词：钢管 内表面 鼓包 夹杂物 定径 减径 

分 类 号：TG335.71[金属学及工艺—金属压力加工]