Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1977-02-10
1978-06-13
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
75226, 75200, B22F 100
Patent
active
040947092
ABSTRACT:
This invention relates to a method of forming and subsequently heat treating articles of near net shape from powder metal which includes the steps of producing a thickwalled container by forming a cavity of predetermined shape in a mass of suitable container material such that the walls of the container are of sufficient thickness so that the exterior surface thereof does not closely follow the contour of the cavity, filling the container with powder metal, applying heat and pressure to the container such that the container material acts like a fluid to apply hydrostatic pressure to the heated powder contained in the cavity thereby consolidating the powder metal to produce a densified compact, preparing the densified compact for heat treating by selectively removing portions of the container to form a jacket of container material around the densified compact, heat treating the densified compact and completing removal of the container material.
REFERENCES:
patent: 3622313 (1971-11-01), Havel
patent: 3940268 (1976-02-01), Catlin
patent: 3992200 (1976-11-01), Chandholz
Metals Handbook, 1948, Ed. p. 420.
Metals Handbook, vol. pp. 645 & 646, 1961.
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