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Ultra-coarse, monocrystalline tungsten carbide and a process for the preparation thereof, and hardmetal produced therefrom
Ultra-coarse, monocrystalline tungsten carbide and a process for the preparation thereof, and hardmetal produced therefrom
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机译:超粗单晶碳化钨及其制备方法,以及由此生产的硬质合金
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摘要
A process is described for the preparation of tungsten and/or molybdenum metal powder or carbide by reducing and optionally carburizing treatment of tungsten and/or molybdenum oxide powder in the presence of alkali metal compounds, wherein at least two alkali metal compounds are used in a ratio so that mixed alkali tungstate or molybdate potentially formed in an intermediate step ((Li, Na, K)2 WOZ, (Li, Na, K)2MoOZ) has a melting point of less than 550° C., wherein z is from 3 to 4.
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机译:描述了一种通过在碱金属化合物的存在下对钨和/或氧化钼粉末进行还原和任选地渗碳处理来制备钨和/或钼金属粉末或碳化物的方法,其中在碱金属化合物中使用至少两种碱金属化合物。比例,以便在中间步骤中可能形成混合的碱式钨酸盐或钼酸盐((Li,Na,K) 2 Sub> WO Z Sub>,(Li,Na,K) 2 Sub> MoO Z Sub>)的熔点小于550度; C.其中z为3到4。
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