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ZHANG Jing, SHAN Jiguo, WEN Peng, REN Jialie. Effects of welding parameters on weld porosity during CO2 laser welding of die-cast magnesium alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (5): 17-20,24.
Citation: ZHANG Jing, SHAN Jiguo, WEN Peng, REN Jialie. Effects of welding parameters on weld porosity during CO2 laser welding of die-cast magnesium alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (5): 17-20,24.
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Effects of welding parameters on weld porosity during CO2 laser welding of die-cast magnesium alloys

  • 1.

    Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

  • 2.

    Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;Key Laboratory for Advanced Materials Processing Technology, The Ministry of Education, Tsinghua University, Beijing 100084, China

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  • Received Date: December 23, 2009
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    • Abstract
  • The effects of welding parameters including laser power,welding speed,welding conditions on pore formation tendency(represented as porosity) during laser welding of die-cast magnesium alloys with two different gas contents were investigated,and the porosity prevention measures were also studied.It is shown that the pore formation tendency during laser welding of 2 mm thick die-cast magnesium alloys with higher gas content is greater than that of 5 mm thick die-cast magnesium alloys with lower gas content.As a whole,the porosity increases with the increase of laser power and the decrease of welding speed for both two thicknesses.For 5 mm thick die-cast magnesium alloys with lower gas content,low porosity weld bead can be obtained by both double sided welding and remelting after welding,and the porosity can reduce to 2.4% and 2.5%,respectively.However,for the 2 mm thick die-cast magnesium alloys,these porosity prevention measures are not effective.
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