X80管线钢埋弧焊接头性能分析  

Analysis of weldability of X80 pipeline steel

作　　者：张敏[1] 姚成武[1] 聂斌英[2] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048 [2]宜春学院工学院,江西宜春336000

出　　处：《焊接学报》2005年第9期19-22,26,共5页Transactions of The China Welding Institution

基　　金：陕西省教育厅自然科学基金资助项目(01JK134)

摘　　要：从焊接性和焊接接头使用性能两个方面入手,结合焊接接头的硬度、拉伸和冲击韧度的测试,对X80管线钢的焊接性能进行了试验分析。结果表明,焊接热影响区的性能发生了较大变化,其中粗晶区出现硬化脆化现象,并导致韧度下降,而不完全重结晶区和回火区则存在一个软化区。通过组织分析,对焊接热影响区的组织状态对焊接接头力学性能的影响进行了讨论。The mechanical properties and weldabilities of X80 pipeline steel were investigated by testing hardness, tensile strength and impact toughness in this paper. The result showed that the toughness of CGHAZ decreased because of the hardening and embrittling substance appeared in coarse-grained heat affected zone (CGHAZ), and there was a softening zone between the intercritical heat affected zone (ICHAZ) and the subcritical heat affected zone (SCHAZ). The effect of the organization on X80 mechanical properties was discussed also.

关 键 词：管线钢 硬化 软化 高匹配 

分 类 号：TG113[金属学及工艺—物理冶金]