Resistance Spot Welding of some Sintered Steels

Abstract

The aim of the paper is to study the possibility of welding some sintered steels, which were obtained from mixtures of iron with different concentrations of graphite powders (between 0.2 and 0,8% weight). The sintered steels were resistance spot welded using different parameters and were investigated by optical microscopy in order to study the evolution of microstructures of the welded areas and base materials. There were perform studies regarding the evolution of microhardness respectively the evolution of tensile strength too.