Process for producing a sintered body

Details Process for producing a sintered body Process for producing a sintered body

1990-07-10

1991-02-26

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making porous product

419 36, 419 37, 419 38, 419 53, 419 54, 419 56, 419 57, 419 58, B22F 100

Patent

active

049960229

ABSTRACT:
A sintered body is produced by a process comprising the steps of mixing one or more metal powder particles with an organic binder, injection-molding the mixture to form a green body of a predetermined shape, removing the binder from the green body to form a porous body substantially made of the metal powder, and heating the porous body to a sintering temperature and holding it at that temperature to produce a sintered body, in which process the binder is removed through the sequence of the following steps: preheating the green body in an inert gas atmosphere in a temperature range that creates open pores in it; placing the green body, in which open pores have started to form, in a hydrogen gas atmosphere optionally mixed with an inert gas; holding the green body in a temperature range where the metal powder is not carburized and where the open pores will be maintained, so that the greater part of the binder is removed to form a porous body that is substantially made of the metal powder alone; and further holding said porous body at said heating temperature for a sufficient period of time to vaporize the carbon in the small amount of residual binder in the porous body through reaction with hydrogen.

REFERENCES:
patent: 4113480 (1978-09-01), Rivers
patent: 4305756 (1981-12-01), Wiech, Jr.
patent: 4404166 (1983-09-01), Wiech, Jr.
patent: 4534936 (1985-08-01), Carlstrom et al.
patent: 4569821 (1986-02-01), Duperray et al.
patent: 4661315 (1987-04-01), Wiech, Jr.
patent: 4758272 (1988-07-01), Pierotti et al.
patent: 4836980 (1989-06-01), Kashiwadari et al.
patent: 4917859 (1990-04-01), Hamo
patent: 4921665 (1990-05-01), Klar et al.

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