Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on the Weldability of Magnesium Alloy by Laser Heat Source (III) - Butt Weldability of Sand Casting Magnesium Alloy using Pulsed Nd:YAG Laser -

레이저 열원을 이용한 마그네슘 합금의 용접성에 관한 연구 (III) - Pulsed Nd:YAG 레이저를 이용한 사형주조 마그네슘 합금의 맞대기 용접성 -

  • Kim, Jong-Do (Division of Marine Engineering, Korea Maritime University) ;
  • Lee, Jung-Han (Technical Institute of Sungwoo Hitech Co., LTD.) ;
  • Lee, Mun-Yong (Technical Institute of Sungwoo Hitech Co., LTD.)
  • Received : 2012.11.27
  • Accepted : 2013.01.04
  • Published : 2013.04.30
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Abstract

Magnesium has good castability and limited workability, so its products have been manufactured by almost casting processes. In this study, a pulsed Nd:YAG laser was used to butt-weld the sand casting magnesium alloys. And the effect of welding conditions such as peak power, pulse width, welding speed was evaluated in detail. As a result of this study, large underfill and plenty of spatter taken place under the conditions with high peak power. Thus, it is recommended to use low peak power and long pulse width to obtain good welds with deep penetration. It is also confirmed that the welding speed and pps(pulse per second) are directly connected at weld defects such as underfill, porosity.

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References

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