Dissimilar metal welding of S690 QL with DOCOL 1400 M steel for the structures of various means of transport

Abstract

Purpose: The novelty and the aim of the article is to check the possibility of dissimilar welding of two grades of steel with significantly different properties. Design/methodology/approach: Two various materials have been checked in welding in order to obtain a high-quality joint of various means of transport. The properties of the joint were checked by NDT (Non Destructive Test) and also bending and tensile strength were tested. Findings: Relations between process parameters and the quality of welds. Research limitations/implications: In the future, it can be suggested to investigate the effect of micro addition of nitrogen and oxygen in gas shielding mixtures of the MIG/MAG welding process. Practical implications: The proposed innovation will not cause problems in the production process provided that the technological regime will be respected. Social implications: Modifying the welding method will not affect the environment and production management methods. Producing dissimilar welds (although it is very difficult) translates into large savings. Originality/value: It is to propose a new solution with its scientific justification. The article is addressed to manufacturers of high-strength steel and advanced high-strenth steel for automotive industry and other means of transport. Keywords: dissimilar welding, S690 QL, DOCOL 1400 M, transport, shielding gas mixture, production savings. Category of the paper: Research paper.