EFFECT OF WELDING REGIME AND FILLER CONTENT ON STRUCTURE OF MICROALLOYED Nb/Ti STEEL WELDMENTS

摘要

In this paper changes in the proportions of certain microconstituents in the structure of weld metal and the heat affected zone are described and the mechanical and technological properties of welded joints of high-strength microalloyed Nb/Ti steel performed by E-process and MAG-process of welding with modification of the filler composition and welding parameters were analysed. The influence of different structures of filler material and welding parameters on the microstructure of HAZ and weld metal is studied with the aim to explain changes of mechanical and technological properties of welded microalloyed Nb/Ti steel joints.