Fabrication process for high temperature aluminum alloys by sque

Details Fabrication process for high temperature aluminum alloys by sque Fabrication process for high temperature aluminum alloys by sque

1995-10-31

1998-04-28

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

428547, 148512, 148514, 148549, 148437, 419 5, 419 27, 419 46, 419 47, B22F 908, C22C 2100

Patent

active

057447349

ABSTRACT:
A method for fabricating articles of high-temperature aluminum alloys having a compressional strength of at least 20 kg/mm.sup.2 at temperatures of 300.degree. C. or greater, is disclosed. The method comprises the steps of: (a) forming a porous preform from particles of a first aluminum alloy via cold-pressing, the preform having the shape and dimension of the aluminum alloy article to be fabricated; (b) squeeze-casting a molten second aluminum alloy into void spaces of the porous preform to form an aluminum composite containing the first aluminum alloy, which serves as a reinforcement phase, dispersed in the second aluminum alloy, which serves as a matrix phase; (c) wherein the molten second aluminum alloy is cast at such temperatures so as to cause a surface of the first aluminum alloy particles to melt and thereby form a strong bonding with the second aluminum alloy. The first aluminum alloy particles are formed by melt-spinning, followed by rapid solidification and precipitation, of a composition of the first aluminum alloy to form a thin ribbon, then pulverizing the thin ribbon into particles. Unlike the prior art processes, which fabricate high-temperature aluminum alloys only in essentially two-dimensional articles, the method disclosed herein allows the capability of near net shaping, i.e., it can fabricate high-temperature aluminum alloy articles of essentially any intended shapes. The present process allows selective reinforcement of the fabricated articles to be achieved at strategically important locations, so as to expand the range of engineering applications of the fabricated articles without incurring substantially increased manufacturing cost.

REFERENCES:
patent: 4597792 (1986-07-01), Webster
patent: 4693747 (1987-09-01), Bretz et al.
patent: 4715893 (1987-12-01), Skinner et al.
patent: 4729790 (1988-03-01), Skinner
patent: 4828632 (1989-05-01), Adam et al.
patent: 5292358 (1994-03-01), Miura et al.

Affiliated with

Also associated with

Rating

Fabrication process for high temperature aluminum alloys by sque does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fabrication process for high temperature aluminum alloys by sque, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication process for high temperature aluminum alloys by sque will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1533980