Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1996-07-03
1998-08-04
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148709, 148713, 148538, 148549, 148551, 266114, 266113, C22C 100
Patent
active
057887845
ABSTRACT:
This invention relates to a process for heat treating light-metal castings, particularly cylinder heads for piston engines, in which, after solidifying and removing the castings from the mold, they are solution treated with the residual casting heat at approximately 530.degree. C., are quenched, aged at approximately 170 to 210.degree. C. and are then cooled to room temperature. The castings are quenched individually with a mist-type fine mixture of air and water, which is nozzle sprayed on all sides by forced convection flow only to approximately 130 to 160.degree. C., and are charged at this temperature, while utilizing the residual heat, into an aging furnace. The evaporation heat of the water is utilized as latent cooling heat. The forming water vapor, carried away by the workpieces, is condensed and the condensed water is guided back to moisten the air/water mixture.
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Crafton, Jr., Paul M., "Heat Treating, Aging System also Permits Core Sand Removal", Modern Casting, Sep. 1989, pp. 48-50.
Koppenhoefer Ralph
Weimer Siegfried
Elve M. Alexandra
Mercedes-Benz AG
Simmons David A.
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