Optimization of welding of the truck's rear axle semi-housing

Abstract

The welding technology of the truck's semi-housing is presented in this paper. Steeds of different mechanical properties and chemical composition were tested and influence of welding on those base metals was monitored. Their weldability was first analyzed (semi-housing tube, ring and flange), then the welding procedure and filler metals were selected and finally the welding technological parameters were defined. The analytical (computational) methods, the TTT diagrams were applied for estimates of the base metal weldability, as well as the experimental methods based on hardness measurements in the weld's critical zones and analysis of their microstructure.