Analysis of porosity characteristics of 5052 aluminum alloy welded by hybrid CO2 laser-MIG welding
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1.
Laboratory of Welding Process and Materials, Ningbo Branch, China Academy of Ordnance Science, Ningbo 315103, China;
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2.
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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Received Date:
2012-03-15
Accepted Date:
2012-04-25
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Abstract
Hybrid CO2 laser-metal inertia gas(MIG) welding is an efficient and fast welding method,however,porosity is prone to produce when welding aluminum alloy.In order to analyze the porosity characteristics of aluminum alloy in medium thickness by means of hybrid CO2 laser-MIG welding,10mm thick 5052 aluminum alloy was welded by means of bead weld.Theoretical analysis and experimental verification was carried out.The results show that the heat source space and the back protection cushion block influence the porosity obviously.The porosity rate is minimum when the heat source spacing is 2mm~3mm.Porosity can be effectively suppressed by the back protection of cushion block.
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