Mechanicalproperties and Microstructural Analysis of Stainless Steels (304 & 310) through Dissimilar Joining by TIG & SMAW

摘要

The dissimilar metal joints of have been emerged as a structural material for various industrial applications which provides good combination of mechanical properties like strength, corrosion resistance with lower cost. Selections of joining process for such a material are difficult because of their physical and chemical properties. The stainless steel 304 and 310 grades dissimilar material joints are very common structural applications. Joining of stainless steel 304 and 310 is very critical because of carbon precipitation and loss of chromium leads to increase in porosity affects the quality of joint leads deteriorate strength. In the present study, stainless steel of grades 304&310 were welded with mild steel by Tungsten Inert Gas (TIG) and Shielded Metal Arc Welding (SMAW) processes. The tensile strength of dissimilar metal joints was investigated. The results were compared for different joints made by TIG and SMA welding processes and it was observed that SMA welded dissimilar metal joints have better physical properties than TIG welded joints. NDT is carried out to check the weld quality. Heat Treatment for Stress Relieving and for increasing Strength. Micro-structural Analysis of welded area and HAZ.