Would deep cryogenic treatment do something similar ? I don't know much about that process but I know that cryogenic treatment of some metals helps make it harder without making it brittle.
kwg
No, cryogenic quenching would be a WOFTAM. It has no application here.
Its application is to dealing with retained austenite at room temperature in certain die steels, by driving the martensite transformation to completion when this isn't achieved at room temperature. For a while there was a bit of a fad for doing it to rifle barrels, which was no more than snake oil.
