Effect of Cyclic Cryogenic Treatment on Wear Resistance, Impact Toughness, and Microstructure of 42CrMo Steel and Its Optimization

Table 6

Range analysis results of impact toughness.

Factor (j)	A	B	C
	40.4	38.2	39.5
	38.6	36.6	38.1
	39.3	43.6	40.8
Range (Rj)	1.767	7.067	2.767
Rank order of factors	B > C > A
Optimum levels	A1	B3	C3