The quenching phase converts the majority of the tool steel from the austenitic state to an un-tempered martensite condition. Quench rates using 3 bar pressure or higher are not recommended due to the potential for distorting and the higher stress involved. To be safe, longer times are acceptable while shorter times are not. Austenitize 25 to 30 minutes per inch at temperature (to be safe, minimum austenitize time for smaller parts under 1 inch can be up to 1 hour) up to 4 inches thick in cross section and 10 to 25 minutes per inch for thickness over 4 inches before inert gas pressure quenching (Generally in nitrogen), to rapid cool with 2 times atmosphere pressure (2 bar) or high velocity equivalent. First, preheat and hold at 800° C (1,475° F) to 850° C (1,560° F) until the part is uniformly heated and then increase the heat to 1,030° C (1,885° F) to Austenitize, otherwise known as soaking the tool. Titus “HD” Rock Injector vs The Oslo PointĪir hardening DC53 is best accomplished under vacuum.CREUSABRO DUAL (WITH TITANIUM CARBIDE PLATES).
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