On the mechanism of wear resistance enhancement of tool steels by deep cryogenic treatment

This study elucidates the underlying mechanism associated with microstructural modifications responsible for significant enhancement of wear resistance of tool steels by deep cryogenic treatment (DCT). It is demonstrated that DCT not only reduces the amount of retained austenite, but also conditions the martensite that, in turn, leads to the precipitation of higher amount of ultrafine secondary carbides. These favorable microstructural alterations by DCT enhance the resistance of tool steels against dynamic changes during wear resulting in improved wear resistance.

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