Experimental and Statistical Investigation of Machinability of AISI D2 Steel Using Electroerosion Machining Method in Different Machining Parameters

Table 6

Regression equations for output results.

Regression equations
Surface roughness (Ra, μm)	=	1.236 + 0.4794 ampere + 0.002653 Time on − 0.00709 Time off
Hole diameter (HD, mm)	=	12.4249 + 0.01883 ampere + 0.000273 Time on − 0.001531 Time off
Crater diameter (CD, mm)	=	46.35 + 13.492 ampere + 0.07028 Time on provide the DOI for “Zhao et al., 2016”. 0.1222 Time off
Wear amount (WA, g)	=	0.4252–0.0204 ampere + 0.000291 Time on (μs) − 0.001512 Time off
Material removal rate (MRR, g/min)	=	0.00183 + 0.001566 ampere − 0.000002 Time on − 0.000066 Time off
Processing time (PT, min)	=	410.5–114.33 amper + 0.0858 Time on + 2.937 Time off