Journal of Welding and Joining

  • 제30권5호
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  • Pages.70-75
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  • 2012
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  • 2466-2232(pISSN)
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  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
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레이저 열원을 이용한 마그네슘 합금의 용접성에 관한 연구 (I) - AZ31B-H24 및 AZ31B-O의 레이저 용접성 비교 -

A Study on the Weldability of Magnesium Alloy by Laser Heat Source (I) - Comparison on Laser Weldability of AZ31B-H24 and AZ31B-O -

  • Lee, Jung-Han (Technical Institute of Sungwoo Hitech Co., LTD.) ;
  • Kim, Jong-Do (Division of Marine Engineering, Korea Maritime University) ;
  • Lee, Mun-Yong (Technical Institute of Sungwoo Hitech Co., LTD.)
  • 투고 : 2012.10.15
  • 심사 : 2012.10.31
  • 발행 : 2012.10.30
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초록

This study is related to the laser weldability of AZ31B magnesium alloy, an all-purpose wrought alloy with good strength and ductility. In general, AZ31B is classified into AZ31B-H24 and AZ31B-O depending on temper designation. Thus, in this study, the laser weldability of AZ31B-H24 and AZ31B-O was investigated and compared. CW Nd:YAG laser was used to produce bead and butt joints. And the effects of welding conditions on the weldability of these joints were examined in detail. As a result of this study, AZ31B-H24 was found to have thinner oxide film and smaller grain size compared with AZ31B-O. Due to such difference, in bead welding, AZ31B-H24 had more wide welding range for full penetration compared with AZ31B-O. Furthermore, it was also confirmed that AZ31B-H24 and AZ31B-O have different welding conditions to obtain stable keyhole in butt welding.

키워드

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