Method for the treatment and production of free-flowing WC-Ni-Co powders
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United States of America Patent
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Apr 7, 1992
Grant Date -
N/A
app pub date -
May 14, 1990
filing date -
May 24, 1989
priority date (Note) -
Expired
status (Latency Note)
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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.
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