摘要
为研究焊接电流对5052铝合金非熔化极惰性气体保护焊(TIG)焊接质量的影响,对100~120A电流下TIG焊接所得焊接接头的显微组织、力学性能和耐蚀性进行了探讨。结果表明,当焊接电流从100A增加到120A时,5052铝合金TIG焊接接头的强度随电流的增大而增大,塑性随电流的增大而减小;当电流为115A时所得接头的综合力学性能最好,此时抗拉强度为212.1MPa,达到母材抗拉强度的90.8%,断面收缩率为28.9%,比母材50.3%的断面收缩率降低约一半。随着焊接电流的增大,腐蚀的类型从点蚀为主转变到以晶间腐蚀为主,但腐蚀电流的变化规律不明显。
To investigate the influence of welding current on the welding quality of the TIG welding of 5052 aluminum alloy,the mechanical properties,microstructure and corrosion resistance of the welded joints obtained by different currents which array form 100 A to 120 A were discussed. The results showed that when the welding current is 100~115 A,with the increases of welding current,the strength of the welded joint increases,and the corrosion tendency decreases,but the plasticity decreases. When the current is 115 A,the joint possesses the best comprehensive mechanical performance,and the tensile strength is 212.1 MPa,reaching 90.8 % of the tensile strength of the base metal,and the reduction of area is 28.9 %,about half of which is lower than the 50.3 % of the base metal. With the increase of welding current,the corrosion type changed from pitting corrosion to intercrystalline corrosion,but the change rule of corrosion current was not obvious.
作者
刘敏
赵艳君
刘亚红
戴青松
吕游
梁岸
LIU Min;ZHAO Yan-jun;LIU Ya-hong;DAI Qing-song;LYU You;LIANG-An(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Processing for Nonferrous Metal and Featured Materials,Nanning 530004,China;Guangxi Liuzhou Yinhai Aluminum Co,Ltd,Liuzhou 545006,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2019年第3期891-898,共8页
Journal of Guangxi University（Natural Science Edition）
基金
广西创新驱动发展专项资金项目(桂科AA17202011-1)
广西有色金属及特色材料加工重点实验室项目(GXYSSF1809)
广西科学研究与技术开发项目(桂科重14122001-3)
关键词
钨极氩弧焊
焊接电流
力学性能
盐雾腐蚀
tungsten inert gas welding (TIG)
welding current
mechanical property
salt spray corrosion
