DefinePK

Abstract

This paper includes the study of friction welding being performed between a hollow head and a solid stem of an engine valve. Martens tic stainless steel (X45CrSi93) of 6.5 mm diameter was used as the experimental material. The inner diameter of the hollow head was 3 mm in size. Different welding parameters were chosen which includes friction pressure, upset pressure, burn-off and rotational speed. Mechanical and metallurgical investigations were performed. The optimum welding parameters were determined for these working conditions. The micro hardness variation across the weld zone was conducted using Vickers micro hardness test. The response surface methodology was adopted for determining the optimum combination of welding parameters. The regression equation was developed to predict the maximum tensile strength for the optimal parameters.