Abstract: The invention disclosed includes a heat treatment aging oven for heating metal parts having a heating chamber with an opening, a first transport mechanism disposed within the heating chamber for moving a first metal part through the heating chamber, and a second transport mechanism disposed within the heating chamber for moving a second metal part through the heating chamber, the first transport mechanism located in a spaced relationship to the second transport mechanism. A two piece door assembly for selectively opening the oven opening is also disclosed.

Abstract: The invention relates to a quench management system for cooling heat treated workpieces in an alkylene glycol solution. The system includes a quench tank adapted to contain a solution of alkylene glycol into which the heat treated workpieces are immersed for quenching and a rinse tank adapted to contain a solution of alkylene glycol into which the quenched workpieces are immersed. A mechanism for heating the alkylene glycol solution in the rinse tank is provided to thereby cause some of the alkylene glycol in solution to precipitate in the rinse tank. A fluid transport mechanism, such as a pump, is fluidly connected to each of the rinse tank and quench tank, for moving the precipitated alkylene glycol solution from the rinse tank into the quench tank.