Method for the treatment and production of free-flowing WC-Ni-Co

Details Method for the treatment and production of free-flowing WC-Ni-Co Method for the treatment and production of free-flowing WC-Ni-Co

1990-05-14

1992-04-07

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Spheroidizing or rounding of existing solid metal particles

75346, 75351, 419 18, 419 23, 419 36, 419 37, 419 54, B22F 700, B22F 900

Patent

active

051024527

ABSTRACT:
The invention relates to a method for the treatment and production of material, particularly for the treatment and production of free flowing, finely divided metal powder or metal matrix composite powder. The material is composed of tungsten carbide and at least two components, nickel and cobalt. According to the method of the invention the composite powder is first mixed with the organic binder in order to form powder agglomerate, which powder agglomerate is further subjected to sintering treatment in order to remove the binder and to improve the mechanical strength of the composite powder. Further the composite powder is subjected to classification and the classified composite powder is thermally treated at a high temperature in an at least one-step thermal treatment in order to melt the composite powder at least partially, and in order to mix the various components to each other. For example, the material thermally treated by plasma is further cooled off in a free fall into material composed of essentially spherical particles.

REFERENCES:
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4626477 (1986-12-01), Jackson et al.
patent: 4872904 (1989-10-01), Dorfman
patent: 4886638 (1989-12-01), Penkunas et al.

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