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TwinArc TIG Welding with Ultrasonic Excitation
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WANG Jianjun1,LIN Tao2
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(1. College of Electronic and Electrical Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China; 2. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
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Abstract In order to enhance the mechanical properties of weld by using ultrasonic vibration, a new method of twinarc tungsten inertgas (TIG) welding was developed. The welding will be completed by jointly using combined ultrasonic arc and ordinary DC arc technology. The ultrasonic arc was used for injecting ultrasound excitation into the molten pool to improve weld quality, and the DC arc was used as main heat source to increase deposition efficiency. The feasibility experiment of the welding system was done by using the steel 304. Metallographic analysis shows that the method can thin the microstructure of weld. The tensile testing under nature temperature indicates that the method can improve tensile properties of the weld effectively.
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Received: 18 January 2010
Published: 27 January 2011
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