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

Figure 8

SEM micrographs of worn surfaces of (a) CHT specimens and CT specimens treated at (b) −120°C, (c) −160°C, and (d) −196°C.

(a)

(b)

(c)

(d)