Process for producing a sintered compact from steel powder

Details Process for producing a sintered compact from steel powder Process for producing a sintered compact from steel powder

1992-03-03

1992-11-10

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Controlled cooling after sintering

419 31, 419 45, 419 54, 419 57, 419 58, B22E 100

Patent

active

051620995

ABSTRACT:
The process serves for producing a carbon-containing sintered compact from steel powder. In this process, the steel powder is heated to sintering temperature in an atmosphere containing, at least for a time, carbon monoxide, is kept at sintering temperature over a predetermined period of time and the sintered compact formed thereby is subsequently cooled.
In this process, the carbon content of the sintered compact to be produced is to be set to a predetermined value in a way which is simple and suitable for mass production.
This is achieved by the partial pressure of the carbon monoxide in the atmosphere being changed selectively during the execution of the production process, and by this change being controlled in such a way that the carbon content of the sintered compact is set to the predetermined value after execution of the production process.

REFERENCES:
patent: 4436696 (1984-03-01), Buck et al.
patent: 4614638 (1986-09-01), Kuroishi et al.
Metals Handbook, Ninth Edition, vol. 7, "Powder Metallurgy", American Society for Metals, 1984, pp. 360-361.
"Sintereisen und Sinterstahl", Kieffer, et al., Wien, Springer-Verlag 1948, pp. 390-395.
"Fortschritte der Pulvermetallurgie", Band II, Technologische Einrichtungen und Pulvermetall. Werkstoffe, Eisenkolb, et al., Berlin, 1963, pp. 166-171.

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