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.
出处
《材料工程》
EI
CAS
CSCD
北大核心
1995年第4期45-47,共3页
Journal of Materials Engineering
