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http://dx.doi.org/10.12656/jksht.2011.24.5.277

The Spot Weldability of SD35 and SD30A Steel for Reinforcement Bar  

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)
Publication Information
Journal of the Korean Society for Heat Treatment / v.24, no.5, 2011 , pp. 277-286 More about this Journal
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.
Keywords
Spot welding; Hardness; Microstructure; Joint strength;
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