-
1.发明授权
公开(公告)号：US4793969A
公开(公告)日：1988-12-27
申请号：US143869
申请日：1988-01-14
摘要： A process is disclosed for producing a sheet of tungsten heavy alloy which comprises forming metal particles of the alloy wherein each metal particle is a uniform admixture of the alloy components, entraining the particles in a carrier gas, passing the particles and the carrier gas into a high temperature zone at a temperature above the melting point of the matrix phase of the particles and maintaining the particles in the zone for a sufficient time to melt at least the matrix phase of the particles and form spherical particles, followed by rapidly and directly solidifying the high temperature treated material while the material is in flight. A slurry is formed of this high temperature treated material and a liquid medium, the liquid medium is removed from the material and a planar cake is formed of the material, the cake is dried, and sintered to a density equal to or greater than about 90% of the theoretical density of the alloy to form the sheet.
摘要翻译： 公开了一种用于生产钨重合金片的方法，其包括形成合金的金属颗粒，其中每个金属颗粒是合金组分的均匀混合物，将颗粒夹带在载气中，使颗粒和载气流入 在高于颗粒的基质相的熔点的温度下将高温区域保持在该区域中的颗粒至少熔化至少颗粒的基质相并形成球形颗粒，然后快速且直接固化 高温处理材料，同时材料在飞行中。 由该高温处理材料和液体介质形成浆料，从材料中除去液体介质，并由该材料形成平面的饼状物，将滤饼干燥并烧结至等于或大于约90的密度 合金的理论密度的百分比形成片材。
-
2.发明授权
公开(公告)号：US4800064A
公开(公告)日：1989-01-24
申请号：US143864
申请日：1988-01-14
摘要： A process is disclosed for producing a sheet of tungsten heavy alloy which involves forming a solution of chemical compounds containing the metal values of the alloy in the correct proportion as in the alloy, crystallizing the compounds from solution and drying the compounds, reducing the compounds to their respective metals wherein each particle is an admixture of the allow components; forming a slurry of the metals and a liquid medium, removing the liquid medium from the metals and forming a planar cake of the metals, drying the cake, and sintering the cake to a density equal to or greater than about 90% of the theoretical density of the alloy to form the sheet.
摘要翻译： 公开了一种用于生产钨重合金片的方法，其涉及如合金中那样以正确的比例形成含有合金金属值的化合物溶液，使化合物从溶液中结晶并干燥化合物，将化合物还原成 其各自的金属，其中每个颗粒是允许组分的混合物; 形成金属和液体介质的浆液，从金属中除去液体介质并形成金属的平面饼状物，干燥滤饼并将饼状物烧结至等于或大于理论密度的约90％的密度 的合金形成片材。
-
3.发明授权Hydrometallurical process for producing finely divided spherical refractory metal based powders 失效用于生产精细分散的球状难熔金属基粉末的湿法冶金方法
公开(公告)号：US4731111A
公开(公告)日：1988-03-15
申请号：US26312
申请日：1987-03-16
CPC分类号： B22F1/0048
摘要： A process for producing finely divided spherical refractory metal based powders comprises forming an aqueous solution containing at least one refractory metal, forming a solid reducible refractory metal based material containing a compound selected from the group consisting of refractory metal salts, refractory metal oxides, hydroxides and mixtures thereof, reducing the solid material to refractory metal based powder particles, subjecting the refractory based metal particles to a high temperature zone to melt a portion of the particles and cooling the molten material to form essentially spherical refractory metal based powder particles.
-
公开(公告)号：US4900590A
公开(公告)日：1990-02-13
申请号：US292713
申请日：1989-01-03
CPC分类号： C23C24/00 , B22F1/02 , C23C18/1216 , C23C18/1241 , C23C18/1275
摘要： A method is disclosed for producing aluminum oxide coated iron powder which comprises contacting iron powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the iron powder to form a slurry, removing essentially all of the liquid from the slurry to produce iron powder with a coating of hydrolyzed aluminum oxide, and firing the iron powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron powder with a coating of aluminum oxide.
摘要翻译： 公开了一种用于生产氧化铝涂覆的铁粉的方法，该方法包括使细颗粒的铁粉与液体铝化合物接触，其中铝是可水解的，并向化合物和铁粉中加入水以形成浆料，基本上除去所有 液体从浆料中生产出具有水解氧化铝涂层的铁粉，并在非氧化性气氛中用水解的氧化铝涂层焙烧铁粉以产生具有氧化铝涂层的铁粉。
-
公开(公告)号：US4913731A
公开(公告)日：1990-04-03
申请号：US252411
申请日：1988-10-03
CPC分类号： C22C1/045 , B22F1/0096 , B22F2999/00
摘要： A process for forming particulate tungsten alloys from the individual metal sources comprises forming an aqueous solution containing the individual metals for producing tungsten heavy alloys, producing a solid particulate material from the solution and injecting the particle material into a high temperature zone and retaining such material in the high temperature zone for a time sufficient to at least partially melt the metals that are alloying with tungsten while maintaining the temperature of those metals below the boiling point of the lowest boiling metal in the second component. The prealloyed composite powder contains tungsten grains below about 5 micrometers as a discontinuous phase and has a continuous phase of the tungsten and a second component selected from nickel, iron, copper and mixtures thereof.
摘要翻译： 从各个金属源形成颗粒状钨合金的方法包括形成含有用于生产钨重合金的各种金属的水溶液，从溶液中生产固体颗粒材料，并将颗粒材料注入高温区并将这些材料保持在 高温区域足以至少部分地熔化与钨合金化的金属，同时将这些金属的温度保持在第二组分中最低沸点金属的沸点以下的时间。 预合金化复合粉末包含低于约5微米的钨晶粒作为不连续相，并且具有钨的连续相和选自镍，铁，铜及其混合物的第二组分。
-
公开(公告)号：US4900587A
公开(公告)日：1990-02-13
申请号：US292714
申请日：1989-01-03
CPC分类号： C23C24/00 , B22F1/02 , C23C18/1216 , C23C18/1241 , C23C18/1275
摘要： A method is disclosed for producing aluminum oxide coated iron-aluminum alloy powder which comprises contacting iron-aluminum alloy powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the iron-aluminum alloy powder to form a slurry, removing essentially all of the liquid from the slurry to produce iron-aluminum alloy powder with a coating of hydrolyzed aluminum oxide, and firing the iron-aluminum alloy powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron-aluminum alloy powder with a coating of aluminum oxide.
摘要翻译： 公开了一种用于生产氧化铝涂覆的铁 - 铝合金粉末的方法，其包括使细粒径的铁 - 铝合金粉末与液体铝化合物接触，其中铝可水解并将化合物和铁 - 铝合金粉末加入到 形成浆料，从浆料中基本上除去所有的液体，以生产具有水解氧化铝涂层的铁铝合金粉末，并在非氧化性气氛中用水解的氧化铝涂层焙烧铁铝合金粉末以产生 铁铝合金粉末，涂有氧化铝。
-
公开(公告)号：US4885028A
公开(公告)日：1989-12-05
申请号：US253173
申请日：1988-10-03
CPC分类号： B22F1/0096 , C22C1/045 , Y10S75/956
摘要： A process for forming particulate tungsten heavy alloys from agglomerated material containing the individual metals by using a high temperature zone is improved by retaining the material in the high temperature zone for a time sufficient to at least partially melt the metals that are alloying with tungsten while maintaining the temperature of those metals below the boiling point of the lowest boiling metal in the alloying component.
摘要翻译： 通过将材料保持在高温区域中，将材料保持在高温区域中足以至少部分地熔化与钨合金化的金属同时保持 这些金属的温度低于合金组分中最低沸点金属的沸点。
-
8.发明授权Process for producing finely divided spherical metal powders containing an iron group metal and a readily oxidizable metal 失效用于生产包含铁族金属和容易氧化的金属的精细分散的球形金属粉末的方法
公开(公告)号：US4802915A
公开(公告)日：1989-02-07
申请号：US185713
申请日：1988-04-25
CPC分类号： C22C33/0207 , B22F1/0048
摘要： Alloys of a first group of metals containing at least one iron group metal and one or more easily oxidizable metals can be formed by forming an aqueous solution of the first group of metals, forming solids containing the metals from the solution, reducing the solids to a metallic powder, converting the metallic powder to metallic alloy spherical powders, agglomeration the spherical powder with one or more easily oxidizable metals in a non-oxidizing atmosphere, thereafter the agglomerates are subjected to a sufficient temperatures under non-oxidizing conditions to form an alloy. Alternatively, the easily oxidizable metals can be agglomerated with the solids containing the iron group metal prior to converting the agglomerates to a spherical alloy powder.
-
9.发明授权Hydrometallurgical process for producing finely divided copper and copper alloy powders 失效用于生产细分铜和铜合金粉末的湿法冶金工艺
公开(公告)号：US4778517A
公开(公告)日：1988-10-18
申请号：US54553
申请日：1987-05-27
CPC分类号： B22F1/0048
摘要： A process for producing finely divided spherical copper copper alloy powders comprises forming an aqueous solution of copper and alternatively other metal values forming a reducible metallic material from the solution, reducing the material to metal powder particles, subjecting the metal particles to a high temperature zone to melt a portion of the metal powder particles and to form droplets and cooling the droplets to form an essential spherical metal alloy particles.
-
10.发明授权Hydrometallurgical process for producing finely divided spherical low melting temperature metal based powders 失效用于生产精细分散的球形低熔点金属基粉末的湿法冶金方法
公开(公告)号：US4723993A
公开(公告)日：1988-02-09
申请号：US28824
申请日：1987-03-23
CPC分类号： B22F1/0048 , C22C1/04 , Y10S75/953
摘要： A process for producing finely divided spherical metal low melting temperatures powders comprises forming an aqueous solution metals, forming a reducible solid material from the solution, reducing the solid to metal powder particles, subjecting the metal particles to a high temperature zone to melt a portion of the metal powder particles and to form droplets and cooling the droplets to form essentially spherical metal particles.
-
-
-
-
-
-
-
-
-
搜索结果
33 条记录 (耗时 0.02 秒)
