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1.发明授权Method of preparing powders for hard materials from cobalt salts and soluble tungstate salts 失效从钴盐和可溶性钨酸盐制备硬质材料粉末的方法
公开(公告)号：US5632824A
公开(公告)日：1997-05-27
申请号：US557579
申请日：1995-11-14
CPC分类号： C01G53/00 , C01G51/00 , C01G51/006 , C01G53/006 , C22C1/051 , C01P2006/60
摘要： There is disclosed a method for preparing a powder containing ammonium salts of W+Co(Ni) complex ions, through chemical reactions, in a water solution at temperatures from 70.degree. C. to the boiling point and at pH around neutral, between tungstate salts and cobalt (nickel) salts characterized in that said tungstate salts are the highly soluble sodium tungstate or ammonium metatungstate.
摘要翻译： 公开了一种通过化学反应在温度为70℃至沸点和pH约中性的水溶液中在钨酸盐之间制备含有W + Co（Ni）络合物离子的铵盐的粉末的方法 和钴（镍）盐，其特征在于所述钨酸盐是高度可溶的钨酸钠或偏钨酸铵。
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2.发明授权Method of preparing powders for hard materials from APT and soluble cobalt salts 失效从APT和可溶性钴盐制备硬质材料粉末的方法
公开(公告)号：US5658395A
公开(公告)日：1997-08-19
申请号：US464564
申请日：1995-06-05
IPC分类号： C01B32/949 , B22F9/22 , B22F9/24 , C22C1/04
摘要： According to the present invention there is now provided a method for preparing a powder containing W and Co and/or Ni characterized in reacting APT and a soluble salt of Co (Ni) in water at temperatures from room temperature to the boiling point of the solution keeping the solution pH at a constant level during the chemical reactions. The powder is filtered off, dried and reduced to a metallic powder which may be further carburized to form a powder containing WC and Co and/or Ni.
摘要翻译： 根据本发明，现在提供一种制备含有W和Co和/或Ni的粉末的方法，其特征在于使APT和Co（Ni）在水中的可溶性盐在室温至溶液沸点的温度下反应 在化学反应期间将溶液的pH值保持在一定水平。 将粉末滤出，干燥并还原成可进一步渗碳以形成含有WC和Co和/或Ni的粉末的金属粉末。
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公开(公告)号：US5594929A
公开(公告)日：1997-01-14
申请号：US465356
申请日：1995-06-05
摘要： According to the invention there is now provided a simple method of preparing a powder containing WC and cobalt and/or nickel. APT-powder and a powder of a basic salt of cobalt and/or cobalt are mixed in water or in mixed solvents. The suspension is stirred to react at temperatures ranging from room temperature to the boiling point of the solution whereby a precipitate is formed, which precipitate is filtered off, dried and finally reduced to a metallic powder.
摘要翻译： 根据本发明，现在提供了制备含有WC和钴和/或镍的粉末的简单方法。 APT粉末和钴和/或钴的碱性盐的粉末在水或混合溶剂中混合。 在室温至溶液沸点的温度范围内搅拌悬浮液进行反应，由此形成沉淀物，滤出沉淀物，干燥，最后还原成金属粉末。
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公开(公告)号：US5584907A
公开(公告)日：1996-12-17
申请号：US464965
申请日：1995-06-05
申请人： Mamoun Muhammed , Inger Grenthe , Sverker Wahlberg
发明人： Mamoun Muhammed , Inger Grenthe , Sverker Wahlberg
IPC分类号： C01B32/949 , B22F1/00 , B22F9/22 , B22F9/24 , C22C1/04
摘要： There is now provided a method for preparing a powder containing W and Co and/or Ni from APT and a soluble salt of Co(Ni) by a chemical reaction in a water suspension at temperatures from room temperature to the boiling point of the solution whereafter the formed powder is filtered off, dried and reduced to a metallic powder. Additional metals from groups IVa, Va or VIa of the periodic table of the elements are added to the suspension as compounds like oxides, hydroxides, soluble or insoluble salts.
摘要翻译： 现在提供了一种通过化学反应在水悬浮液中从室温至溶液沸点的温度从APT制备含有W和Co和/或Ni的粉末和Co（Ni）的可溶性盐的方法， 将形成的粉末滤出，干燥并还原成金属粉末。 元素周期表第Ⅳa，Ⅴa或Ⅵa族的额外金属作为化合物如氧化物，氢氧化物，可溶性或不溶性盐加入到悬浮液中。
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