摘要
研究了异种金属焊接管道在修补焊前后残余应力的演化,以了解核电厂管道在修补焊后是否满足抗应力腐蚀开裂的要求。采用手工焊和自动焊技术进行了SA106B钢与Inconel 600合金异种金属管道的对接焊,在对原始焊缝进行了局部的打磨后,分别采用焊条电弧焊和钨极氩弧焊技术对打磨处进行了修补焊接。采用轮廓法对管道修补焊后状态下的环向和轴向焊接残余应力进行了测量,得到了管道的焊接残余应力分布。通过对异种金属管道修补焊接头的残余应力分析,确认了修补焊后最大残余应力小于415 MPa,可以满足相关抗应力腐蚀开裂的要求,研究结果对开展核电厂管道修补焊有较高的参考价值。
In order to investigate the resistance of stress corrosion cracking in nuclear power plant’s pipes,residual stress evolution in a dissimilar metal welded pipe before and after repair welding was studied.SA106B steel pipe was welded to Inconel 600 pipe by manual and automatic butt welding methods.After partial grinding of the original weld,a repair welding was introduced at the grinding area by shielded metal arc welding and gas tungsten arc welding,respectively.The contour method was used to measure the hoop and axial welding residual stress of the pipes before and after repair welding,and residual stress distribution of the pipes was obtained.Through the analysis of residual stress in the dissimilar metal pipes before and after repair welding,it was confirmed that the maximum residual stress was less than 415 MPa,which met the relevant requirements of resistance against stress corrosion cracking.The research results were of high relevance to the repair welding of nuclear power plant components.
作者
Sanjooram Paddea
饶德林
叶晋
罗凡
张书彦
Sanjooram Paddea;Rao Delin;Ye Jin;Luo Fan;Zhang Shuyan(Centre of Excellence for Advanced Materials,Dongguan 523808,Guangdong,China;Shanghai Pharmaceutical School,Shanghai 200135,China)
出处
《焊接》
2020年第2期16-19,I0016,共5页
Welding & Joining
基金
广东省引进创新创业团队项目(2016ZT06G025)
广东省自然科学基金项目(2017B030306014)。
关键词
异种金属焊接
管道修复焊接
残余应力
轮廓法
dissimilar metal welding
pipe repair welding
residual stress
contour method
