Dependence of pre-treatment structure on spheroidization and turning characteristics of AISI1040 steel

During machinability, the combination of machining process parameters and material properties component to be machined plays an important role. Material depend upon type phase form present grain size formed phases, which in turn depends prior treatment given alter initial room temperature types form. Accordingly, spheroidization was carried out on medium carbon steel (AISI1040) by altering structure through normalizing hardening treatment. Machinability experiments were performed CNC machine varying constraints. Tool wear surface roughness obtained turning analyzed correlated. Using Minitab full factorial design, ANOVA study out. With help regression analysis, residual main effect plots combined optimization (tool roughness) targeted. result shows excellent machinability for as-bought-spheroidized condition where feed has a 67% contribution tool (TW) whereas depth cut 71.91% (SR). Also, optimized values are (0.39 mm/rev), (0.6 mm), spindle speed (780 rpm) with composite desirability 0.8174. TW SR experimental 0.039 mm 2.89 μm, respectively, difference between actual is less than 5%.