Optimization of Parameters in Multi-Spot Projection Welding of Thin Aluminized Steel Sheets
Source abstract
Abstract
Welding is a technological variant of the electric resistance spot-welding process in which the machined protrusion on the surface is heated and rapidly deformed, and the small molten zone formed at the interface is then forged to form the weld spot. The paper analyses the effects of projection welding parameter values for thin, low-carbon aluminized steel sheets. Two sets of 16 welded samples having three or five protrusions were performed and analyzed using the Taguchi method. The microstructural aspects were analyzed in cross sections made through the welded points, highlighting the expulsion or accumulated effects of the Al-Si alloy protective layer and the formation of intermetallic compounds. To estimate the effect of welding parameters, the samples were subjected to tensile strength tests, and the fracture mode was evaluated. It was found that the values of the breaking forces were close for the two types of samples analyzed, for identical values of the welding regime parameters, but the elongation at break was double in the case of samples with five protrusions. The breaking force increased from 10.9 kN for samples with three protrusions to 11.4 kN for samples with five protrusions, for the same values of welding parameters.
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Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Welding Techniques and Residual Stresses · Surface Treatment and Residual Stress
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Quality Engineering and Industrial Technology Department, Industrial Engineering and Robotics Faculty, National University of Science and Technology Politehnica Bucharest, 313, Splaiul Independentei, 060042 Bucharest, Romania
Materials Science Department, Material Science and Engineering Faculty, National University of Science and Technology Politehnica Bucharest, 313, Splaiul Independentei, 060042 Bucharest, Romania
Robots and Production Systems Department, Industrial Engineering and Robotics Faculty, National University of Science and Technology Politehnica Bucharest, 313, Splaiul Independentei, 060042 Bucharest, Romania
Manufacturing Engineering Department, Faculty of Engineering, “Dunarea de Jos” University of Galati, 47 Domneasca St., 800008 Galati, Romania
Centre for Advanced Research in Welding (SUDAV), Faculty of Engineering, “Dunarea de Jos” University of Galati, 47 Domneasca St., 800008 Galati, Romania
Funding
Romanian National Program for Research
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