无缝钢管覆膜穿孔顶头的失效分析  

Failure Analysis of the Coating Punching Top Used for a Seamless Pipe

作　　者：明文龙[1] 周凤云[1] 肖建中[1] 胡镇华[1] 方苏中 

机构地区：[1]华中理工大学,武钢汉口轧钢厂

出　　处：《材料工程》1995年第4期45-47,共3页Journal of Materials Engineering

摘　　要：从宏观断口形貌出发，讨论了无缝钢管覆膜穿孔顶头的膜层结构、顶头的钢基体成分、显微组织及热处理工艺，认为顶头覆膜层结构不致密，不能有效地抑制顶头钢基体出现裂纹，甚至可能会促使裂纹加速扩展。ccording to the appearances of a macrofractographs,the coating structure of punching top which is used to make a seamless pipe, chemical composition of the steel matrix,microstructure and technology of heat treatment has been discussed. Because the coating structure of punching top is not densified,the coat-ing cannot effectively restrain a crack formation in the steel natrix and may accelerate a fatique crack prop-agation.

关 键 词：无缝钢管 穿孔顶头 覆膜 失效分析 轧制 

分 类 号：TG335.71[金属学及工艺—金属压力加工]