Investigating the Effect of Cooling Media on Hardness, Toughness, Coefficient of Friction, and Wear Rate of Mild Steel Heat Treated at Different Temperatures

Figure 9

Optical micrographs of wear tracts of samples showing wear mechanisms. (a) Parent sample. (b) Sample heated at 500°C and cooled by air. (c) Sample heated at 900°C and cooled by oil. (d) Sample heated at 500°C and cooled by water.

(a)

(b)

(c)

(d)