Process of preparing a ferritic alloy with a wear-resistive alum

Details Process of preparing a ferritic alloy with a wear-resistive alum Process of preparing a ferritic alloy with a wear-resistive alum

1991-07-25

1992-10-20

Lechert, Jr., Steven J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 38, 419 45, 419 54, 419 57, 419 60, 428552, 428632, 4284722, G22F 100

Patent

active

051568055

ABSTRACT:
A ferritic alloy with a wear resistive oxide scale is obtained through the steps of pressing a ferritic alloy powder containing aluminum into a powder compact of a desired configuration, sintering the powder compact in a non-oxidizing atmosphere to provide a resulting sintered product, and heat-treating the sintered product in an oxidizing gas atmosphere in order to precipitate in the surface thereof alumina in the form of an alumina scale as the wear resistive oxide scale which is responsible for improved surface hardness or wear resistance. Due to the inherent porous nature of the sintered product, the oxidizing gas can readily penetrate deep into the surface of sintered product to facilitate the oxidization of the product surface into the alumina scale, in addition to that the oxidization depth can be controlled such as by the density of the product, which makes it possible to readily control the thickness of the alumina scale. The resulting alumina scale has an improved scale adherence due to the ferritic structure of the alloy.

REFERENCES:
patent: 4144380 (1979-03-01), Beltran et al.
patent: 4661169 (1987-04-01), Aggen et al.
patent: 4751099 (1988-06-01), Niino et al.
patent: 5089223 (1992-02-01), Hamada et al.

Affiliated with

Also associated with

Rating

Process of preparing a ferritic alloy with a wear-resistive alum does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process of preparing a ferritic alloy with a wear-resistive alum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of preparing a ferritic alloy with a wear-resistive alum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-190407