杨江,王斌,王维,丁煜瀚,李永斌,刘书文

• 1:西南石油大学材料科学与工程学院
• 2:辽宁省新民市沈阳采油厂
• 3:四川科宏石油天然气工程有限公司

摘要(Abstract)：

对Q345/IN825复合板复层与基层分别采用钨极氩弧焊(GTAW)和埋弧焊(SAW)进行焊接试验。采用光学显微镜、扫描电镜对焊缝显微组织及主要合金元素分布进行了分析,利用拉伸、冲击和硬度试验测定了接头的力学性能。结果表明,基层焊缝组织为珠光体和针状铁素体,复层焊缝组织为树枝晶奥氏体,复层母材侧热影响区的奥氏体组织有明显粗化现象,复层焊缝中发现有Nb元素富集产生的析出物。接头的抗拉强度介于Q345和IN825母材强度之间,拉伸断裂发生在母材部位;焊缝金属冲击韧性低于母材;焊缝硬度高于母材硬度。焊缝金属与母材之间没有发生明显的元素迁移,确保了复层焊缝的耐蚀性。

关键词(KeyWords)： Q345/IN825双金属复合板;GTAW焊;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 四川省高校油气田材料重点实验室开放基金(X151515KCL26);; 土库曼斯坦300亿项目采集输油气用复合管材腐蚀机理研究(CQ2014B-32-Z3)

作者(Author): 杨江,王斌,王维,丁煜瀚,李永斌,刘书文

DOI: 10.13289/j.issn.1009-6264.2016.01.027

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