摘要
采用钨极氩弧焊和手工电弧焊焊接316L/X65双金属复合管。利用光学显微镜、能谱仪、扫描电镜、力学性能测试及电化学测试等分析手段研究了复合管焊接接头的微观结构、化学成分、力学性能及电化学腐蚀性能。结果表明,过渡层焊缝的化学成分受到稀释较小,过渡层熔合线附近出现了元素迁移,不锈钢层焊缝与母材的化学成分基本一致;扩散层为类马氏体+残留奥氏体,过渡层和不锈钢层焊缝均为奥氏体+少量铁素体;在试验参数下,焊接接头各项力学性能优良、无缺陷;覆层焊缝与母材的电化学腐蚀性能相差极小。
316L/X65 bimetal clad pipe was welded by GTAW and SMAW. The microstructure,chemical composition,mechanical properties and electrochemical corrosion behavior of welding joints were investigated by OM,EDS,SEM,hardness test,tensile test,impact test and electrochemical test. The results show that the chemical composition of transition welding seam is little diluted,and elemental migration appears near the fusion line of transition weld seam. Welding seam and base material have the same chemical composition in stainless steel layer. The microstructure of transition layer is characterized by the martensite-like and retained austenite;the transition layer and stainless steel layer contain austenite and a little ferrite. The defect free joint is produced and performed well under the experimental parameters. The difference of electrochemical corrosion properties between weld seam and base material in stainless steel layer is very little.
出处
《钢铁》
CAS
CSCD
北大核心
2016年第5期69-75,共7页
Iron and Steel
基金
四川省大学生创新训练资助项目(201510615061)
四川省教育厅重点资助项目(15ZA0057)
