Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Spot Weldability of SD35 and SD30A Steel for Reinforcement Bar

건설용 이형 철근(SD35, SD30A)의 점용접성

  • Lee, Su Yeon (Department of Metallurgy & Advanced Materials Engineering, Changwon National University) ;
  • Park, Dae Young (Department of Metallurgy & Advanced Materials Engineering, Changwon National University) ;
  • Huh, Seok Hwan (Samsung electro- mechanics) ;
  • Youn, Kuk Tea (Mechatronics & Materials Institute) ;
  • Lee, Chan Gyu (Department of Metallurgy & Advanced Materials Engineering, Changwon National University) ;
  • Gornakov, Vladimir S. (Department of Metallurgy & Advanced Materials Engineering, Changwon National University) ;
  • Taguchi, Osamu (Department of Metallurgy & Advanced Materials Engineering, Changwon National University) ;
  • Yoo, Dea Hwang (Department of Metallurgy & Advanced Materials Engineering, Changwon National University)
  • 이수연 (창원대학교 금속.신소재공학부) ;
  • 박대영 (창원대학교 금속.신소재공학부) ;
  • 허석환 (삼성전기) ;
  • 윤국태 (대구기계부품연구원) ;
  • 이찬규 (창원대학교 금속.신소재공학부) ;
  • ;
  • ;
  • 유대황 (창원대학교 금속.신소재공학부)
  • Received : 2011.07.11
  • Accepted : 2011.08.26
  • Published : 2011.09.30
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Abstract

The spot weldability of metal joints between SD35 and SD30A steel was investigated. This study was aimed to determine the spot welding parameters (i.e. welding current and time) for reinforcement bar joint and to evaluate the weldability, mechanical strength, hardness and microstructure. The results indicated that shear strength and elongation of the welding joints at 12.5kA and 1000 ms were 26.7 $kgf/mm^2$ and 22%, respectively. And fracture distribution of them by using shear and tensile test showed 100% necking mode and 100% ductile mode, respectively.

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