Ultrasonic Stress Relieving of 7020 Aluminium-Alloy MIG Welded Joint
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摘要: 研究了16mm厚7020铝合金板的熔化极气体保护焊焊接工艺,对焊后试板进行超声冲击消应处理,研究了超声消应前后焊缝残余应力的变化。试验表明,7020铝合金采用熔化极气体保护焊焊接,焊后进行超声消应处理,可有效改善焊缝的残余应力。Abstract: This paper deals with metal inert gas welding technics of 7020 aluminium alloy plate with 16mm thickness. The proper welding parameter was determined and ultrasonic treatment to relieve the welding residual stress was conducted. The results show that with ultrasonic peening, the welding residual stress of 7020 aluminium alloy MIG welded joints were relieved.
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