焊管2012，Vol.35Issue(12)：5-10,6.
X100螺旋埋弧焊管焊接HAZ微区组织与性能研究
Research on Microstructure and Performance in Welding HAZ of X100 SAWH Pipe
张建勋 1孙茜 1毕宗岳 2牛辉3
作者信息
- 1. 西安交通大学材料科学与工程学院,西安710049
- 2. 国家石油天然气管材工程技术研究中心,陕西宝鸡721008
- 3. 宝鸡石油钢管有限责任公司钢管研究院,陕西宝鸡721008
- 折叠
摘要
Abstract
In this paper, aimed at the softing and hardening in welding HAZ of XI00 SAWH Pipe, the influence regulars of the microstructure and M -A island distribution on HAZ microhardness and micro impact shearing strength were investigated. The results showed that microhardness increases locally in the coarsed grain heat affected zone (CGHAZ), and slightly reduces in the fined grain heat affected zone(FGHAZ) and incomplete heat affected zone(ICHAZ). Simultaneously, there is corresponding relationship between microhardness and micro impact shearing strength, meaning the micro impact shearing strengh is high if the microhardness is high in the same region. The microstrucure of CGHAZ is granular bainite (GB) , the quasi-polygon ferrite and polygon ferrite in the FGHAZ, the GB and ferrite in the ICHAZ, and the tiny GB in base metal. The content of the M-A island microstructure gradually decreases from the CGHAZ, FGHAZ, ICHAZ, to the base metal. The microstructure and its content are the main influecne factors to HAZ performance, the ferrite in microstructure can soften HAZ and the M-A island microstructure harden HAZ , and the influence is larger with the content of the ferrite and M-A island increasing.关键词
X100管线钢/螺旋埋弧焊管/微区组织Key words
X100 pipeline steel/ SAWH pipe/ microstructure performance分类
矿业与冶金引用本文复制引用
张建勋,孙茜,毕宗岳,牛辉..X100螺旋埋弧焊管焊接HAZ微区组织与性能研究[J].焊管,2012,35(12):5-10,6.
