In this thesis we presented the fundamental principles of resistance spot welding and its use for welding stainless steel. We focused on the forming of heat tint after the welding process. We were searching for the optimal area of welding parameters for austenitic stainless steel of two manufacturers, with the goal of achieving as little heat tint of the surface as possible, but maintaining appropriate mechanical properties. We also researched the adequacy of the weld spots, using destructive methods and formed a heat tint criteria for resistance welding of stainless steel and presented heat tint formation and weld strength in regard to the set welding parameters. On this basis we could optimize corrosion resistance of weld spots and increase the use of the process in stainless steel applications in pharmaceutical, chemical and food industry, or other industries with high demands for corrosion resistance of welded parts.
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