Effect of employing metal cored filler wire for single v butt joint welding of Ti-Nb microalloyed 800MPa steels

Abstract

Ti-Nbmicroalloyed 800 MPa steels are an important group of advanced high strength steels being developed for automobile applications. One requirement for practical application is the development of a reliable welding process. P-GMAW technique with synergic control and metallic cored filler wires are the advances in the domain of GMAW technique. These are used in welding Ti-Nb steel. The results indicate that use of metal cored wire increased penetration, reduces spatter marginally reduces HAZ width, increases weld hardness, and UTS is marginally higher. In both samples fracture took place in the HAZ, indicating it is the weakest domain in the welded system. Overall results indicate that the use of metal cored wire is beneficial compared to the solid wire during P-GMAW. © 2020 Author(s).