Abstract
Spot welding involves the joining of two or more plate metals in localized areas where melting and jointure of a little volume of fabric happens from heating caused by resistance to the passage of an electrical current. This process is typically used for obtaining a lap joint of plate metal parts. In this work, stainless steels and medium carbon steel were used. Three rules for welding set-up, lowest tap on the fastening electrical device, highest % current setting on the weld management and shortest weld time setting on the weld management were adopted. Experiments conducted to show the effect of these variables on the welding diameter and tensile strength for each sample for medium carbon steel and stainless steel separately and joining both metals together by spot welding. The results show that the utmost durability was at stainless steel specimens and minimum tensile strength was at medium carbon steel specimens. Furthermore, the obtained results showed that the maximum heat generated was at stainless steel specimens and minimum heat generated values was at medium carbon steel specimens for all current dependent in this work. Meanwhile, slight effect of heat generated on the spot diameter for the current of 10.6 & 5.3 kA, and so significant effect on the spot diameter for the last current (2.3kA).
Highlights
Resistance spot welding (RSW) may be a method that has been widely used in sheet metals production with benefits of high speed, suitableness for automation and inclusion in high-production assembly lines with completely different fabricating operations (Cho and Cho 1989)
Medium carbon steel and austenitic stainless steel 304L samples were used in the research, and the chemical composition of each sample is shown in table-1and 2, analyzed by material analysis division
Spot welding involves the joining of two stainless steel and medium carbon steel plates in this study
Summary
Resistance spot welding (RSW) may be a method that has been widely used in sheet metals production with benefits of high speed, suitableness for automation and inclusion in high-production assembly lines with completely different fabricating operations (Cho and Cho 1989). In the spot fastening method, a weld lump can begin to make once decent energy has been placed into the weldment zone to boost the fabric to the solidus-liquids temperature of the joined materials and to start the forming of a molten weld pool. The value and time of the present and the resistance of the workpieces confirm the scale of the formed lump (Salem 2011). It differs from different fastening strategies in this no filler is used, and mechanical force is applied to forge weld the heated zone (Hulst 1969). The current is controlled by two methods: The setting of the electrical device switch determines the most quantity of weld current accessible. The % of current management determines the % of the offered current to be used for creating the weld
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