Himanshu Krishna Rai, Maneesh Tewari, Sandeep Kumar, Arun Kumar Chaudhary
Abstract: The welding input parameters have significant impact on weld joint of a quality. Weld-bead geometry, mechanical attributes, and distortion are a few examples of properties that can be used to describe the joint quality. HR E34 low alloy steel is extensively used in the automobile industry. The material is a high-quality steel that differs from conventional mild steel in that it possesses a special combination of desirable properties. These steels have exceptional yield strength, notch toughness, fatigue characteristics, weldability, and formability. The present article reports on the investigations into the input parameters of resistance spot welding to improve weld quality and weld strength. In order to conduct the experiments, the One-Factor-at-Time method was adopted. The welding current, weld time and electrode pressure were selected as variable input parameter. The output characteristic measured was the tear strength of the welded joint. The experimental results revealed that the welding current of 15kA, welding time of 17 cycles and electrode pressure of 8 bar provided the maximum possible tear strengths of the spot weld joint. The maximum variation in the tear strength of the welded joint was observed by the variation in the welding current.