Hard alloy containing molybdenum

Details Hard alloy containing molybdenum Hard alloy containing molybdenum

1985-12-13

1987-01-27

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

75233, 75237, 75238, 75236, 75240, 75241, 75242, 419 13, 419 16, 419 31, 419 53, 419 54, C22C 2902

Patent

active

046393528

ABSTRACT:
This invention relates to a hard alloy comprising two phases: a hard phase consisting of at least one compound having a crystal structure of simple hexagonal MC type (M: metal; C: carbon) selected from the group consisting of mixed carbides, carbonitrides and carboxynitrides of molybdenum and tungsten, and a binder phase consisting of at least one element selected from the group consisting of iron, cobalt and nickel. The hard phase is prepared by carburizing an (Mo, W) alloy obtained by reducing oxides of molybdenum and tungsten with a particle size of at most 1 micron, is composed of coarse particles with a mean particle size of at least 3 microns, and has a uniform molybdenum to tungsten ratio in the particles. The hard alloy has a gross composition within the range of the shaded portion ABCDEA in FIG. 1.

REFERENCES:
patent: 4049380 (1977-09-01), Yih
patent: 4049876 (1977-09-01), Yamamoto
patent: 4066451 (1978-01-01), Rudy
patent: 4212671 (1980-07-01), Ettmayer
patent: 4216009 (1980-08-01), Miyake et al.
patent: 4265662 (1981-05-01), Miyake et al.

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