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Influence of deep-cryogenic treatment on tribological properties of P/M high-speed steel
Podgornik, Bojan, 1970- ; Leskovšek, Vojteh ; Vižintin, Jože
The aim of the present work was to investigate the influence of deep-cryogenic treatment parameters (treatment time and temperature) on the tribological performance of powder-metallurgy (P/M) ...high-speed steel. Special emphasis was put on abrasive wear resistance and resistance to galling under dry sliding conditions. Results were evaluated in terms of high-speed steel wear volume, coefficient of friction under recirpocating sliding, friction variation with load, critical load for galling initation, and stainless steel transfer layer formation. Tribological tests indicate the deep-cryogenic treatment contributes to improved abrasive wear resistance and better galling properties of P/M high-speed steel. However, austenizing temperature is a very important parameter, which defines the lever of possible improvement.
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