investigating metal injection molding of 4605 low-alloy steel feedstock:parametric optimization of the injection stage using rsm technique

In this study, we demonstrate the injection stage of metal injection molding (mim) process to fabricate a small bend-type component. this non-standard but critical engine part is made of a feedstock from the low alloy steel 4605. to optimize various injection parameters, the five-variable box-behnken design (bbd) is used with the assumption of a quadratic model, together with the statistical method of response surface methodology (rsm). samples are then fabricated, and their densities are measured. hence, the significance of these factors as well as the mutual coupling between each two parameters are investigated using the analysis of variance (anova). finally, this paper reveals that injection temperature of 155 ◦c, the injection speed 80 mm/s, holding pressure of 83 bar, holding time of 9 s and the injection pressure of 132 bar led to an optimum density of the green part, which becomes 4.892 g/cm3. then, a new sample is produced using these optimized settings, and the green component density is measured, which is extremely near to the predicted value.