Powder metallurgy processes – Powder metallurgy processes with heating or sintering
Patent
1989-02-08
1990-05-01
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
419 23, 419 39, 419 42, 419 48, 419 67, 419 68, B22F 100
Patent
active
049216643
ABSTRACT:
Method for producing a heat-resistant aluminum-alloy workpiece having high transverse ductility which is manufactured from a compact produced by powder metallurgy, in which alloy powders are first cold-isostatically pressed under a pressure of 1500 to 5000 bar and the extrusion billet (2) produced in this manner is hot-recompacted and extruded to form a bar (7) with rectangular cross-section. Reduction ratio at least 6:1. A prismatic bar section (8) is separated from the bar (7) and is converted without further hot deformation and solely by machining into the final product in a manner such that the mechanical main load directions of the final product position themselves in a plane which is parallel to the plane which is extended through the extrusion direction and the longitudinal axis of the cross-section of the bar (7).
REFERENCES:
patent: 4435213 (1984-03-01), Hideman et al.
patent: 4702885 (1987-10-01), Odani et al.
patent: 4722751 (1988-02-01), Akechi et al.
Metallurgical Dictionary, Henderson, J. G., Reinhold Publishing, 1953.
Asea Brown Boveri Ltd.
Bhat Nina
Lechert Jr. Stephen J.
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