APPLICATION OF DESIGN OF EXPERIMENTS FOR DETERMINING OPTIMAL TECHNOLOGICAL PARAMETERS IN FABRICATING AISI 316 STEEL COATING ON THE INNER SURFACE OF CYLINDRICAL TUBES

Abstract

In this paper, a combination of experimental data and Design of Experiments (DoE) software to determine optimal technological parameters in fabricating electrical arc sprayed AISI 316 coating on the inner surface of cylindrical tubes was studied. Through building experimental matrix and conducting detailed experimental plan, the authors determined the optimal parameter set, including arc load voltage of 30 V, air pressure of 0.34MPa, the rotational speed of workpiece of 50 rpm, the traverse speed of spray gun of 21cm/min when fabricating the coating on the inner surface of a cylindrical tube with a diameter of 128 mm. These parameters are the initial basis for practical applications to produce and repair cylindrical tubes with inner diameters less than 100 mm for meeting domestic demands and reducing product cost.