What Controls Surface Hardness of Steels? | Metallurgy
Get the answer of: What Controls Surface Hardness of Steels? Surface hardness is mainly dependent on the carbon dissolved in austenite at the carburising temperature. When the carbon content at the surface particularly of alloy case hardening steel exceeds 0.70%, the Ms temperature decreases sharply. This means that the amount of retained austenite after quenching increases which results in decreased [...]