Optimisation of welding parameters of Flux Core Arc Welding (FCAW) of EN 24 & SS409 stainless steel for better Tensile strength and Hardness

Abstract

The dissimilar metal joints 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 and mild steel (dissimilar material joints) are very common structural applications. Joining of stainless steel and mild steel 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 order to obtain a good quality weld and control weld distortion, it is therefore, necessary to control the input welding parameters. In this research work, experiments has to be carried out to investigate influence of welding parameters on tensile strength, and hardness of flux cored arc welding (FCAW) by using experimental welding of EN 24 & SS409 stainless steel of 6 mm thick. The research will be applied Taguchi Method on an austenitic stainless steel specimen of dimensions 100 × 100 ×6 mm, which have following interested parameters: various arc current, arc voltage and gas pressure.