Chromium-cobalt fine alloy powder and process for producing same

Details Chromium-cobalt fine alloy powder and process for producing same Chromium-cobalt fine alloy powder and process for producing same

1986-05-12

1987-08-04

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75251, B22F 100

Patent

active

046844015

ABSTRACT:
A chromium-cobalt alloy fine powder is disclosed which consists essentially of spheres with the chromium and cobalt being relatively uniformly distributed throughout the particles of the powder. The process for producing the powder is disclosed. The process involves firing a relatively uniform admixture consisting essentially of anhydrous cobalt (II) chloride and chromium (III) chloride in a furnace in a hydrogen atmosphere at a first temperature of at least about 400.degree. C. and below the sublimation temperature of chromium (III) chloride for a time sufficient to reduce essentially all of the cobalt (II) chloride to cobalt metal and to reduce essentially all of the chromium (III) chloride to chromium (II) chloride. The temperature is elevated to a second temperature of at least about 750.degree. C. and below the sublimation temperature of chromium (II) chloride. The elevation is done by raising the temperature in increments of about 100.degree. C. and holding at the elevated temperature until the evolution of HCl gas ceases. The first reduced mixture is fired at the second temperature for a time sufficient to to reduce essentially all of the chromium (II) chloride to chromium metal without causing appreciable melting of the cobalt metal, to form the alloy powder which is then cooled in a non-oxidizing atmosphere.

REFERENCES:
patent: 2744002 (1956-05-01), Crowley
patent: 3535103 (1970-10-01), Whitfield
patent: 3623861 (1971-11-01), Arias
patent: 4131450 (1978-12-01), Saito
patent: 4612039 (1986-09-01), Scheithauer

Affiliated with

Also associated with

Rating

Chromium-cobalt fine alloy powder and process for producing same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chromium-cobalt fine alloy powder and process for producing same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromium-cobalt fine alloy powder and process for producing same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-882387