Factors affecting tensile-shear strength properties of lap joints between SS400 carbon steel and SUS304 stainless steel using gas metal arc welding process
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Abstract
This research aims to study the factors affecting the tensile-shear strength of lap joints between SS400 carbon steel and SUS304 stainless steel welded using the gas metal arc welding process (GMAW) in the vertical down position with a welding robot arm. The experimental variables include three welding parameters, each with three levels: welding current (120, 140, and 160 amperes) and welding speed (200, 250, and 300 millimeters per minute). A full factorial design was employed to analyze the data variance, main effect, and interaction effects on shear-tensile strength. The results demonstrate that welding current and welding speed had a significant influence on the shear-tensile strength of the lap joints. When welding at a constant speed, increasing the welding current resulted in higher tensile-shear strength and a wider weld bead size. However, increasing the welding speed led to a decrease in tensile-shear strength and narrower weld beads. The trend of the average bent angle was consistent with that of the tensile-shear strength. When welding at a constant welding speed, a higher welding current resulted in a higher bend angle average, while increasing the welding speed lowered the bend angle average. A welding current of 160 A and 200 mm/min speed yielded the highest tensile-shear strength.
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References
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