Optimum milling for H-13 die steel

Hot Die Steel H-13 has the properties of high hot strength, hardness, good resistance to heat, good hot toughness, high resistance to temperature fatigue and wear in medium heat. The input parameters that affect the Material Removal Rate (MRR) and Surface Roughness during milling operation were cutting speed, feed, rate, depth of cut. The present work was aimed to optimize the value of input parameters so as to improve the MRR and Surface Roughness for H-13 die steel. To achieve the same, Minitab 15 software for the Taguchi design of experiment (L-9 orthogonal array) with signal to noise ratio and ANOVA approach was used. It was concluded that during end milling operation, use of high cutting speed (3000 rpm.), feed rate (0.15 mm/tooth) and depth of cut (0.2 mm) were optimized parameters to obtained better surface finish for the specific test range in a H13 material. Also, the feed rate and cutting speed were found to be the most dominant factor than the depth of cut for surface finish.