Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Heat and pressure simultaneously to effect sintering
Patent
1980-01-07
1983-01-11
Hunt, Brooks H.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Heat and pressure simultaneously to effect sintering
419 48, 419 56, 106 3827, B22F 300, B22F 314
Patent
active
043680747
ABSTRACT:
A method is provided for producing a fully dense high temperature powdered metal component. This process comprises the steps of filling a centrally located mold cavity with a high temperature powder, heating the filled mold to a temperature greater than half the melting temperature of the powder in degrees centigrade and less than the melting temperature of the powder, while the cavity is maintained in a vacuum level of at least twenty microns of mercury, axially compressing the heated mold while maintaining the vacuum at a pressure of at least 345 megapascals, while restricting the mold about its lateral periphery holding the mold in a compressed state for at least 20 seconds after attaining maximum pressure, and separating the mold materials from the component. The mold is composed of a material having substantially the same flow stress throughout, and the material is able to maintain its dimensional stability in a viscoelastic state at a temperature of between approximately 950.degree. to 1300.degree. C.
REFERENCES:
patent: 2798810 (1957-07-01), Goetzel
patent: 3284195 (1966-11-01), Googin et al.
patent: 3286498 (1966-11-01), Cogan
patent: 3356496 (1967-05-01), Hailey
patent: 3455682 (1969-07-01), Barbaras
patent: 3469976 (1969-09-01), Iler
patent: 3719479 (1973-03-01), Flanagan
patent: 3844778 (1974-10-01), Malone et al.
patent: 3940268 (1976-02-01), Cotlin
patent: 3970517 (1976-07-01), Van Nederreen
patent: 3992200 (1976-11-01), Chandhok
patent: 4051708 (1977-10-01), Beane et al.
patent: 4063939 (1977-12-01), Weaver et al.
patent: 4088502 (1978-05-01), La Bar
patent: 4094709 (1978-06-01), Rozmus
Hausner H. H., Handbook of Powder Metallurgy, pp. 1, 17, Chem. Pub. Co., N.Y. 1973.
Flynn Edward G.
Otto, Jr. William L.
Aluminum Company of America
Hunt Brooks H.
Lippert Carl R.
Viccaro Patrick J.
LandOfFree
Method of producing a high temperature metal powder component does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of producing a high temperature metal powder component, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing a high temperature metal powder component will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-777301