易朋,胡永俊,房卫萍,余陈,易耀勇

• 1:广东工业大学材料与能源学院
• 2:广东省焊接技术研究所(广东省中乌研究院)广东省现代焊接技术重点实验室

摘要(Abstract)：

针对2205双相不锈钢进行双丝冷金属过渡多层多道焊接,利用光学电镜(OM)、扫描电镜(SEM)和X射线衍射仪(XRD)等分析了焊缝的微观组织,采用电化学腐蚀试验分析了焊缝耐腐蚀性能。结果表明:焊缝组织主要为δ相和γ相,其中盖面焊道中γ相分布密集,填充焊道中γ相分布较密集,打底焊道中γ相较分散;焊缝冷却过程中,首先析出δ相,再从δ相中析出γ相,γ相中依次析出GBA、WA、PTA和IGA;打底焊道、填充焊道和盖面焊道的自腐蚀电流密度分别为10~(-5.66) A·cm~(-2)、10~(-5.58) A·cm~(-2)和10~(-4.9) A·cm~(-2),焊缝大部分区域未发生明显腐蚀,但局部出现了蚀孔和晶界腐蚀,打底焊道、填充焊道和盖面焊道的晶界逐步增多,打底焊道、填充焊道和盖面焊道的耐腐蚀性依次降低。

关键词(KeyWords)： 双相不锈钢;双丝冷金属过渡焊接;显微组织;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 广州市对外科技合作计划项目(201807010036);; 广州市科技计划项目(ZWY201704002);; 广东省省属科研机构改革创新领域项目(2017A070701026);; 广东省工业技术研究院(广州有色金属研究院)创新能力建设项目(2014B070705007);; 广东省科学院实施创新驱动发展能力建设专项资金项目(2017GDASCX-0119)

作者(Author): 易朋,胡永俊,房卫萍,余陈,易耀勇

DOI: 10.13289/j.issn.1009-6264.2019-0541

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