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公开(公告)号：US5529804A
公开(公告)日：1996-06-25
申请号：US412930
申请日：1995-03-29
摘要： A process for the production of hard materials wherein hard constituent powders are coated with cobalt and/or nickel metal in solution by reducing the metals from a suitable compound such as an oxide, hydroxide or salt with a polyol while keeping the powder in suspension. The polyol functions both as a solvent and a reducing agent at the same time and is present in an amount of at least 5 times more moles polyol than moles metal. There is obtained an even distribution of the cobalt and/or nickel over the surface of the hard constituent powder without the formation of islands of pure metal.
摘要翻译： 一种制备硬质材料的方法，其中硬质组分粉末在溶液中用钴和/或镍金属涂覆，通过在保持粉末悬浮液的同时将多种金属从合适的化合物如氧化物，氢氧化物或盐与多元醇一起还原。 多元醇同时作为溶剂和还原剂起作用，并且以多于金属摩尔量的多元醇的摩尔量的至少5倍的量存在。 在硬质成分粉末的表面上均匀分布了钴和/或镍，而不形成纯金属岛。
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公开(公告)号：US5885653A
公开(公告)日：1999-03-23
申请号：US781747
申请日：1997-01-10
申请人： Mats Waldenstrom , Stefan Ederyd , Nicolas Chardon , Henri Pastor
发明人： Mats Waldenstrom , Stefan Ederyd , Nicolas Chardon , Henri Pastor
CPC分类号： C22C29/08 , B22F1/025 , C22C1/051 , C22C1/053 , B22F2998/00 , B22F2998/10 , B22F2999/00
摘要： One or more metal salts of at least one of Co, Ni and/or Fe is dissolved/suspended in water. To the solution/suspension is added at least one hard constituent powder to form a slurry. The solvent is evaporated, preferably by spray drying, and the resultant powder is heat treated in a reducing atmosphere. As a result, a coated hard constituent powder is obtained which, after addition of a pressing agent, can be compacted and sintered according to standard practice. In addition to or instead of said salt of Co, Ni and/or Fe, a soluble salt of Mo and/or W can be used.
摘要翻译： 将Co，Ni和/或Fe中的至少一种的一种或多种金属盐溶解/悬浮在水中。 向溶液/悬浮液中加入至少一种硬组分粉末以形成浆料。 蒸发溶剂，优选通过喷雾干燥，并将所得粉末在还原气氛中进行热处理。 结果，得到涂布的硬质组分粉末，其可以在加入压制剂之后按照标准实践压实和烧结。 除了或代替所述Co，Ni和/或Fe的盐之外，还可以使用Mo和/或W的可溶性盐。
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