Process for shaping and improving the mechanical properties of b

Details Process for shaping and improving the mechanical properties of b Process for shaping and improving the mechanical properties of b

1989-07-28

1991-02-12

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 19, 419 42, 419 48, 419 54, B22F 100

Patent

active

049922386

ABSTRACT:
Process for shaping and improving the mechanical properties of blanks produced by powder metallurgy from an alloy with increased high-temperature strength by extrusion, and the deformation is successively performed in at least two temperature ranges different from one another or in two phases, in that the blank (2) is first reduced in its cross section at a temperature T.sub.1 and then is either agin reduced in at a lower temperature T.sub.2 or is deformed at a temperature T.sub.3 under counterpressure so that its cross section is further widened. T.sub.3 can be smaller than or equal to T.sub.1.

REFERENCES:
patent: 1144595 (1915-06-01), Henderson
patent: 3084042 (1963-04-01), Wartel et al.
patent: 3226267 (1965-12-01), Foerster
patent: 3899325 (1975-08-01), Harrison
patent: 3922182 (1975-11-01), Merrick
patent: 4050143 (1977-09-01), Aslund
patent: 4143208 (1979-03-01), Aslund
patent: 4605599 (1986-08-01), Penrice et al.
patent: 4921664 (1990-05-01), Couper

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