热轧无缝钢管内折缺陷分析  

Analysis of Internal Fold of Hot-rolled Seamless Steel Pipe

作　　者：周晓锋[1] 

机构地区：[1]天津钢管集团股份有限公司,天津300301

出　　处：《钢管》2009年第5期48-51,共4页Steel Pipe

摘　　要：热轧无缝钢管的内折缺陷一直是影响钢管一次合格率和成材率指标的主要原因之一。内折缺陷主要在穿孔过程中产生,其产生的主要原因与连铸管坯质量(内因)有关,也与穿孔工艺制度(外因)合理与否有关。主要分析了穿孔工艺制度与内折的关系,并提出了预防措施。The defect of internal fold of the hot-rolled seamless steel pipe has been so far one of the major elements which negatively influences the first qualification rate and yield target of steel pipes. The said defect mainly occurs in the piercing process,and the main causes for it are related to both the quality of the continuously-cast billet （the internal cause） and the reasonability of the piercing schedule （the external cause）. The analysis focuses on the relationship between the rolling process schedule and the said defect. Accordingly relevant preventative actions are proposed.

关 键 词：无缝钢管 内折缺陷 连铸管坯 穿孔工艺 预防措施 

分 类 号：TG335[金属学及工艺—金属压力加工]