Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1984-08-28
1986-06-17
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041815, C25D 1302
Patent
active
045954739
ABSTRACT:
In order to improve the results which are obtained during the forging of a workpiece, the workpiece is electrophoretically coated with a lubricant formed of glass particles having two distinct formulations. Thus, soft glass particles having a formulation which results in transformation of the glass particles from a solid to a liquid at a relatively low temperature are interspersed with hard glass particles having a formulation which results in transformation of the glass particles from a solid to a liquid at a relatively high temperature. At the relatively high temperature, the materials of the hard and soft melted glass particles combine to form a combined glass lubricant which has a desired viscosity and lubricity at forging temperatures. This enables the soft glass particles to melt at a relatively low temperature and form an oxidation barrier around the workpiece in early stages of a preheat cycle. As the preheat cycle continues, the hard glass particles is transformed to a liquid and combine with the melted soft glass particles to provide a combined glass lubricant which has the high temperature characteristics necessary to insure that good lubrication is achieved during the forging operation.
REFERENCES:
patent: 2734857 (1956-02-01), Snyder
patent: 3642597 (1972-02-01), Sheldon
patent: 3925179 (1975-12-01), Yamamoto
patent: 4281528 (1981-08-01), Spiegelberg et al.
patent: 4318792 (1982-03-01), Snow
Boggs Jr. B. J.
Covell Calvin G.
Goldstein Sol L.
Niebling John F.
TRW Inc.
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