한국레이저가공학회지 (Laser Solutions)

한국레이저가공학회 (Korean Society of Laser Processing)
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보호가스에 따른 소결체의 Nd:YAG 레이저 용접성

Weldability in Nd:YAG Laser of Sintered Material Depend on Shielding Gases

  • 김용 (고등기술연구원 로봇/생산기술센터) ;
  • 양현석 (고등기술연구원 로봇/생산기술센터) ;
  • 박기영 (고등기술연구원 로봇/생산기술센터) ;
  • 이경돈 (고등기술연구원 로봇/생산기술센터)
  • 발행 : 2007.12.31
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초록

This study includes the effects of shielding gas types and flow rate on Nd:YAG Laser weldability of sintered material. The types of shielding gas were evaluated for He, Ar and N2. Bending strength, porosity rate, hardness and aspect ratio testing of laser weld are carried out to evaluated the weldability. As a results, Ar gas was showed the best welding strength even it has the most porosity content on weld metal, and depend on increases the gas flow rate, it was not only got deeper penetration depth but also showed higher bending strength. Therefore we could know that bending strength is not only affect the porosity content but also melting area.

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