Method for preparing powder metallurgical sintered product

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

B - Operations, Transporting

22

F

75/163

B22F 1/00 (2006.01) B22F 3/26 (2006.01) C22C 33/02 (2006.01)

Patent

CA 1331841

ABSTRACT OF DISCLOSURE 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.

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