Parameter Design in Carbonitriding of EN36, 16MnCr5, and AISI 4140 Steels Using Principal Component-Based Grey Incidence (PGI)

Table 6

Confirmation trial conducted at optimal carbonitriding condition.

Responses	Initial setting		Optimal setting using PGI method		Improvements
	Calculated S/N ratio	Response value	Predicted S/N ratio	Response value	S/N ratio	Response value
Surface hardness (HV)	57.148	719	57.267	729	0.119	10
Diffusion depth (DD)	40.869	110	41.486	119	0.617	9
Wear loss (WL)	39.684	0.0102	41.349	0.008	1.665	0.0022
Parameter setting	A3 B2 C3D2		A3 B2 C2D2