Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study for Resistance Spot Weldability of Pre-sealed Sheet Steel for Automobile Body by Using Pre-current

예비전류를 이용한 자동차용 프리실드 강판의 저항 점 용접성 향상에 관한 연구

  • Park, Tae-Gyu (Department of Mechanical Engineering, Hanyang University) ;
  • Yun, Sang-Man (Department of Mechanical Engineering, Hanyang University) ;
  • Rhee, Se-Hun (Division of Mechanical Engineering, Hanyang University)
  • 박태규 (한양대학교 대학원 기계공학과) ;
  • 윤상만 (한양대학교 대학원 기계공학과) ;
  • 이세헌 (한양대학교 기계공학부)
  • Published : 2009.12.31
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Abstract

In the present day, new performances are demanded for automobile body steel sheet for example, light weight, durability, resistance corrosion and environmental protection. For an improvement of resistance corrosion, European automobile companies developed pre-sealed steel in 1990's. Pre-sealed steel have organic coated layer upper zinc coated layer. Evaluating a resistance spot weldability of pre-sealed steel plate is important because resistance spot welding is used mainly in automobile body joining process. In this study, evaluating a weldability of pre-sealed steel plate was carried out using lobe diagram, dynamic resistance and high-speed image. Usually, Pre-sealed steel has poor weldability than GA steel's. To improve a weldability of pre-sealed steel sheet, pre-current was applied to welding process. Pre-current is applied prior to base-current. In conclusion, the weldability of pre-sealed steel has been improved than GA steel's by applying pre-current.

Keywords

References

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Cited by

  1. Evaluation of Surface Crack in Resistance Spot Welds of Zn-Coated Steel vol.55, pp.1, 2014, https://doi.org/10.2320/matertrans.M2013244