The goal in vacuum processing is to cool the workload back down to ambient temperature to avoid workload discoloration and oxidation. The Power Convection vacuum furnace is best suited for higher temperature processing where radiant heat is the dominant heat transfer mechanism. The best applications are those over 1400°F.
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Vacuum heat treatment is a method of heat treating steel in a furnace without exposure to air. The furnace is manufactured to tight tolerances allowing the chamber to be evacuated of air. Tooling and General Heat Treatment have two vacuum furnaces with quench pressure up to 6 Bar allowing the treatment of lower alloyed tool steels and alloy steels.
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440C is good for one thing, and one thing only: Corrosion resistance. If you want a dive knife, make it out of 440C. If I recall correctly, it's got about 13% chromium in it, which makes it very resistant to corrosion. The heat treating alone takes days, and costs $700 for materials alone. Not counting fuel.
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Set up, operate, or tend heating equipment, such as heat-treating furnaces, flame-hardening machines, induction machines, soaking pits, or vacuum Sample of reported job titles: Batch Heat Treat Operator, Burner, Coating Line Worker, Furnace Operator, Heat Treat Furnace Operator, Heat...
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The rotary hearth furnace is used primarily for gear hardening type applications that require process quenching. It comes standard with an endothermic gas atmosphere system.
A wide range of heat treatments was used for 440C, since this material is used after tempering at low temperatures, in the vicinity of 150 ~ and after sec- ondary hardening, at 500 ~ A more restricted set of tempering temperatures, in the vicinity of the secondary hardening peak, was used for BG42 since this steel is cus- tomarily used with these heat treatments for bearing applica- tions where both high hardness and dimensional stability are required.