Method of extruding aluminum-base oxide dispersion strengthened

Details Method of extruding aluminum-base oxide dispersion strengthened Method of extruding aluminum-base oxide dispersion strengthened

1987-03-09

1989-04-04

Lechert, Jr., Stephen J.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

75244, 419 13, 419 41, B22F 100

Patent

active

048184810

ABSTRACT:
Disclosed is a method for extruding fine grain aluminum mechanically alloyed powder material such that the resulting extruded product is substantially free of texture, which method comprises extruding a billet of the powder material having a mean grain size less than about 5 microns through a die having an internal contour which conforms substantially to the formula: ##EQU1## where R is the radius of the die contour at any given point x along the major axis of the die orifice from its entry plane, R.sub.o is the radius of the billet, and K is an arbitrary constant.

REFERENCES:
patent: 3874938 (1975-04-01), Benjamin et al.
patent: 4297136 (1987-10-01), Pickens et al.
patent: 4532106 (1985-07-01), Pickens
patent: 4619699 (1986-10-01), Luton
patent: 4624705 (1986-11-01), Jatkar et al.
patent: 4647304 (1987-03-01), Luton

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