发明授权
US4923512A Cobalt-bound tungsten carbide metal matrix composites and cutting tools formed therefrom 失效
钴结合碳化钨金属基复合材料和由此形成的切削工具

Cobalt-bound tungsten carbide metal matrix composites and cutting tools
formed therefrom
摘要:
Cobalt-bound tungsten carbide metal matrix composites having a unique microstructure are produced by consolidating partially sintered greenware under high pressures, e.g., 120,000 psi, at temperatures less than those used for conventional liquid phase sintering in a relatively short time, e.g., from less than one minute to less than about one hour. The composites have a binder phase which contains less than about 80 weight percent of the tungsten found in a composite prepared from the same or similar compositions via liquid phase sintering. These composites provide cutting tools with both toughness and wear resistance which exceed that of cutting tools made from the same or similar compositions via liquid phase sintering.
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