Analysis of intergranular corrosion of Incoloy825 nickel based alloy welded joints

LI Jiuzhen; WANG Heng

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Analysis of intergranular corrosion of Incoloy825 nickel based alloy welded joints
Vol. 48, Issue 11, Pages: 103-106(2018)
Published：2018
DOI：
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DOI：

LI Jiuzhen, WANG Heng. Analysis of intergranular corrosion of Incoloy825 nickel based alloy welded joints[J]. Eletric Welding Machine2018, 48(11): 103-106. DOI：

摘要

针对国内某核化工Incoloy825镍基合金设备采用常规焊接工艺达不到设计要求的晶间腐蚀速率指标问题

就焊接工艺和焊接材料提出了一系列的改进优化措施

例如焊缝最后一道焊道采用钨极氩弧焊、焊缝背面采用强制水冷方式

焊材由E(R)NiCrMo-3更改为E/S Ni8025

最后试验结果达到了设计要求的合格指标。该研究成果可为Incoloy825镍基合金的焊接技术提供参考。

Abstract

The intergranular corrosion rate index of the Incoloy825 nickel base alloy equipment can not meet the design requirement by using conventional welding technology in domestic nuclear chemical industry. Aiming at this problem

the solutions are proposed to improve and optimize the welding technology and welding material

such as using argon tungsten arc welding to weld the last run

water cooling method for the back of weld and welding material E/S Ni8025 instead of E（R）NiCrMo-3. Finally

the test results meet the qualified index of design requirements. This can provide reference for the welding technology of Incoloy825 nickel-base alloy.