Method of hot die isothermal dwell forging

Details Method of hot die isothermal dwell forging Method of hot die isothermal dwell forging

1978-03-20

1979-05-15

Combs, E. M.

Metal deforming

With cleaning, descaling, or lubrication of work or product

Lubricating

72364, 72700, B21J 300

Patent

active

041540751

ABSTRACT:
A forging compound particularly adapted for hot die dwell forging of titanium and its alloys comprises boundary layer particles (boron nitride or graphite) and a major quantity (more than 60% by weight) of vitreous components. The vitreous components comprise diboron trioxide and silica frit containing a metal oxide wetting agent. In a preferred form, the forging lubricant comprises about 14 to 25% by weight boron nitride particles, balance, vitreous components. The latter comprise about 60% to 75% by weight diboron trioxide, balance silica glass containing cobalt oxide wetting agent in an amount of 1.0 to 3% by weight of the vitreous components. All the foregoing ingredients may be dispersed in a coatable carrier preferably comprising a solvent, e.g., xylene, in which a resin binder is dissolved. A method of using the lubricant includes coating workpieces with the lubricant, heating the workpieces to forging temperature, and imposing forging pressure on the workpiece within an enclosed die for a dwell period to creep-flow the workpiece metal into conformity with the forging die.

REFERENCES:
patent: 3059769 (1962-10-01), Frost
patent: 3110399 (1963-11-01), Godron
patent: 3181324 (1965-05-01), Labino
patent: 3254401 (1966-06-01), Dalton et al.
patent: 3384581 (1968-05-01), Peace
patent: 3411564 (1968-11-01), Miller
patent: 3558488 (1971-01-01), Mann
patent: 3575858 (1971-04-01), Adair et al.
patent: 3840461 (1974-10-01), Espunes

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