Research Article

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

Table 2

Hardness test results of samples heat treated at 500 degrees Celsius.

No. of testsParent (HV)Water (HV)Oil (HV)Air (HV)

1139145125138
2139153134138
3139143140139
Average139147133138