Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1975-10-28
1978-10-03
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75211, 75221, 75224, 75DIG1, 428568, 75229, B22F 300
Patent
active
041182251
ABSTRACT:
A method is disclosed for making fibrous steel webs or matts from particulate iron oxides with the aid of a fiber-forming acrylic polymer. A plurality of continuous filaments are first formed by wet spinning an acrylic polymer spin dope in which particles of iron oxide are dispersed. The filaments obtained are then converted into a precursor web or matt by conventional textile procedures. This is followed by exposing the precursor to a reducing atmosphere (e.g., a gaseous mixture of hydrogen and carbon monoxide) at a temperature in the range of from about 900.degree. C to 1150.degree. C for a period of about 3 to 8 minutes. Under these conditions, the iron oxide particles are reduced to the metallic state and the polymer in the precursor is pyrolized to carbon and by-product gases. The carbon in the system diffuses into the resulting iron, and the individual metal particles sinter to form a matt of steel wire having a configuration essentially corresponding to that of the precursor.
REFERENCES:
patent: 3529044 (1970-09-01), Santangelo
patent: 3671228 (1972-06-01), McIntire et al.
patent: 3697262 (1972-10-01), Fenner
patent: 3846527 (1974-11-01), Winter et al.
patent: 3950478 (1976-04-01), Kenworthy et al.
patent: 4010233 (1977-03-01), Winter et al.
Hunt Brooks H.
Monsanto Company
Stanley Howard C.
Weinkauf Russell E.
Williams, Jr. James W.
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