Process for sintering powdered material in a continuous furnace

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making composite or hollow article

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419 9, 419 19, 419 43, 419 53, 419 54, 419 57, 419 58, 264125, 264 60, 264 65, B22F 700

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047132159

ABSTRACT:
The powdered material contains oxygen in the oxide and/or adsorbed form and the oxygen present is reduced in a first pre-sintering stage and the cohesion of the material is ensured in a second sintering stage. The pre-sintering stage is carried out under a reducing atmosphere based on hydrogen and neutral gas whose flow rate F.sub.G is higher than or equal to: ##EQU1## in which relation: S.sub.P =section of the layer of powder to be sintered in sq.m

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patent: 4225344 (1980-09-01), Fujimori et al.
patent: 4436696 (1984-03-01), Buck et al.
patent: 4448747 (1984-05-01), Moritoki et al.
patent: 4614638 (1986-09-01), Kuroishi et al.

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