Comparative Study on Wear of Hot-Working Die Steels

Qiu Yang Zhang; Shu Qi Wang; Lan Wang

doi:10.4028/www.scientific.net/AMM.331.559

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 331Comparative Study on Wear of Hot-Working Die...

Comparative Study on Wear of Hot-Working Die Steels

Abstract:

The wear behavior and wear mechanism of hot-working die steels H13 and H21 were studied using a pin-on-disc high-temperature wear machine. H21 steel presented higher wear resistance than H13 steel at 25 and 400°C. However the wear rate of H21 steel increased rapidly and was substantially higher than that of H13 steel under a load of 150 N or above at 200°C. Tribo-oxide layer possessing protective effect generated at 200 °C for H13 steel, but appeared at 400 °C for H21 steel with obviously lower amount than that of H13 steel due to relatively high alloy contents. Higher wear resistance of H21 steel is attributed to the undissolved carbides and high thermal strength.