Dry sliding wear of cryotreated multiple tempered D-3 tool steel

Wear test using pin-on-disc machine was used to investigate the role of multiple tempering after cryogenic treatment of D-3 tool steel. Conventional quenching (950 °C) and tempering (150 °C) treatments were given along with intermediate cryogenic treatment (−185 °C). Specimens were subjected to wear tests on pin-on-disc machine in dry sliding condition for sliding distance of 6000 m at 5.5 kg load and for sliding speed of 3.0 m/s. Hardness data, microstructures, wear loss and SEM analysis of worn surface throw light on the underlying metallurgical mechanism responsible in improving wear resistance property of the D-3 tool steel.