Method for preparing powder metallurgical sintered product

Details Method for preparing powder metallurgical sintered product Method for preparing powder metallurgical sintered product

1989-06-20

1990-11-20

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 23, 419 27, 419 32, 419 39, 75252, 75255, 264 71, B22F 326

Patent

active

049717553

ABSTRACT:
It is disclosed a method for preparing a large-sized powder metallurgical sintered product having a superior characteristic by charging mixtures of three types of metallic powder composed of coarse particles, middle particles and fine particles into the molding die while vibrating it, heating the charged material together with the molding die, sintering them, and infiltrating metal of low melting point into the sintered body. According to this method, it is possible to get a large-sized sintered body having a superior strength and surface smoothness or a sintered body prohibiting any cracks or slits by arranging the proper particle size.

REFERENCES:
patent: 4432795 (1984-02-01), Andersen
patent: 4554218 (1985-11-01), Gardner et al.
patent: 4710223 (1987-12-01), Matejczyk
patent: 4769071 (1988-09-01), Klar et al.
patent: 4772449 (1988-09-01), Bones et al.

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