Vacuum oil quenching is the optimal quenching solution for parts that cannot be gas quenched because of large quantity or wide volume of the load. Profitability increases as only one oil quenching cycle can replace several gas quenching cycles in order to treat the same amount of parts. Also, oil quenching allows for the heat treating of parts made of materials that are not compatible with gas quenching due to their raw material characteristics.
Currently, vacuum gas quenching is the heat treat quenching solution with the strongest development in highly alloyed to alloyed steels. This solution has been fundamentally developed since 1992 with the first low pressure carburizing plants proposed by ECM.