Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on Laser Joining of Low Carbon Steel and Aluminum Alloy Part 1 : Process Parameters

강과 알루미늄의 레이저 접합에 관한 연구 Part 1 : 접합 변수의 최적 조건에 관한 연구

  • 박태완 (㈜현대자동차 플랫폼 개발팀) ;
  • 조정호 (한국과학기술원 기계공학과) ;
  • 나석주 (한국과학기술원 기계공학과)
  • Published : 2005.10.01
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Abstract

Steel has been mainly used in the automotive industry, because of good mechanical properties, weldability and so on. However, there has been increase in using aluminum to reduce the weight of vehicle. This leads to improve fuel efficiency and to reduce air pollution. A steel-aluminum hybrid body structure is recently used not only to reduce the weight of vehicle but also to increase safety. In this paper, the laser beam joining method is suggested to join steel and aluminum. To avoid making brittle intermetallic compounds(IMC) that reduce mechanical properties of the joint area, only aluminum is melted by laser irradiation and wetted on the steel surface. The brittle IMC layer is formed with small thickness at the interface between steel and aluminum. By controlling the process parameters, brittle IMC layer thickness is suppressed under 10 micrometers which is a criterion to maintain good mechanical properties.

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References

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