Process for sintering powdered material in a continuous furnace

Details Process for sintering powdered material in a continuous furnace Process for sintering powdered material in a continuous furnace

1987-05-15

1987-12-15

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

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

Patent

active

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

REFERENCES:
patent: 3888663 (1975-06-01), Reichman
patent: 3979234 (1976-09-01), Northcutt et al.
patent: 4137106 (1979-01-01), Doi et al.
patent: 4139375 (1979-02-01), Solomon et al.
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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