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公开(公告)号：US5126104A
公开(公告)日：1992-06-30
申请号：US710851
申请日：1991-06-06
CPC分类号： C22C32/0047 , B22F1/0096 , C23C4/06 , B22F2999/00
摘要： A method is disclosed for preparing an intimate mixture of powders of nickel-chromium-boron-silicon alloy, molybdenum metal powder, and Cr.sub.3 C.sub.2 /NiCr alloy suitable for thermal spray coatings which comprises milling a starting mixture of the above two alloys with molybdenum powder to produce a milled mixture wherein the average particle size is less than about 10 micrometers in diameter, forming an aqueous slurry of the resulting milled mixture and a binder which can be an ammoniacal molybdate compound or polyvinyl alcohol, and agglomerating the milled mixture and binder. The intimate mixture and binder may be sintered in a reducing atmosphere at a temperature of about 800.degree. C. to 950.degree. C. for a sufficient time to form a sintered partially alloyed mixture wherein the bulk density is greater than about 1.2 g/cc. The resulting sintered mixture may be entrained in an inert carrier gas, passed into a plasma flame wherein the plasma gas can be argon or a mixture of argon and hydrogen, and maintained in the plasma flame for a sufficient time to melt essentially all of the powder particles of the sintered mixture to form spherical particles of the melted portion, and to further alloy the sintered mixture, and cooled.
摘要翻译： 公开了一种制备适用于热喷涂的镍 - 铬 - 硼 - 硅合金，钼金属粉末和Cr3C2 / NiCr合金粉末的紧密混合物的方法，该方法包括将上述两种合金的起始混合物与钼粉末 产生直径小于约10微米的平均粒度的研磨混合物，形成所得研磨混合物的水性浆液和可以是氨基钼酸盐化合物或聚乙烯醇的粘合剂，并使研磨的混合物和粘合剂附聚。 紧密混合物和粘合剂可以在还原气氛中在约800℃至950℃的温度下烧结足够的时间以形成烧结的部分合金化混合物，其中堆积密度大于约1.2g / cc。 所得到的烧结混合物可以夹带在惰性载气中，通入等离子体火焰中，其中等离子体气体可以是氩气或氩气和氢气的混合物，并保持在等离子体火焰中足够的时间以熔化基本上所有的粉末 烧结混合物的颗粒形成熔融部分的球形颗粒，并进一步合并烧结的混合物并冷却。
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公开(公告)号：US5374802A
公开(公告)日：1994-12-20
申请号：US999623
申请日：1992-12-31
CPC分类号： H05H1/3405 , H05H1/34 , H05H2001/3431 , H05H2001/3468
摘要： A DC plasma arc generator and method of operation to reduce erosion of the internal parts. The arc generator includes a generally cylindrical anode and a generally cylindrical interelectrode having critical dimensions and spacing to allow introduction of vortical gas flows and stabilization of the primary arc thereby, reducing degradation and erosion of the generator.
摘要翻译： 直流等离子体电弧发生器和操作方法，以减少内部部件的侵蚀。 电弧发生器包括大致圆柱形的阳极和具有关键尺寸和间隔的大致圆柱形电极，以允许涡流气流的引入和主电弧的稳定化，从而减少发电机的劣化和侵蚀。
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公开(公告)号：US5641580A
公开(公告)日：1997-06-24
申请号：US538559
申请日：1995-10-03
申请人： Sanjay Sampath , Jack E. Vanderpool
发明人： Sanjay Sampath , Jack E. Vanderpool
CPC分类号： C23C4/06 , C22C32/0052 , Y10T428/12826
摘要： A molybdenum-based composite powder for thermal spray applications. The composite powder includes a molybdenum-chromium, molybdenum-tungsten, or molybdenum-tungsten-chromium alloy dispersion strengthened with molybdenum carbide (Mo.sub.2 C). The molybdenum-based composite powder may be combined with a nickel-based or cobalt-based alloy to form a two-phase powder blend. The coatings from such powders are made up of molybdenum-based alloy lamellae and, in the two-phase embodiments, nickel-based or cobalt-based alloy lamellae. The coatings exhibit improved corrosion resistance and strength while retaining good sprayability.
摘要翻译： 用于热喷涂应用的钼基复合粉末。 复合粉末包括用碳化钼（Mo2C）增强的钼铬，钼钨或钼 - 钨 - 铬合金分散体。 钼基复合粉末可以与镍基或钴基合金组合以形成两相粉末共混物。 这种粉末的涂层由钼基合金薄片制成，而在两相实施例中，镍基或钴基合金薄片组成。 涂层表现出改进的耐腐蚀性和强度，同时保持良好的喷涂性。
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4.发明授权
公开(公告)号：US5296670A
公开(公告)日：1994-03-22
申请号：US999642
申请日：1992-12-31
CPC分类号： H05H1/34 , H05H1/3405 , H05H2001/3431 , H05H2001/3468 , H05H2001/3478
摘要： A DC plasma arc generator and method of operation including a generally cylindrical anode divided into an arc constricting portion and an exit portion lined with refractory liners and having critical dimensions and spacing to allow introduction of vortical gas flows and stabilization of the primary arc thereby, reducing degradation and erosion of the generator.
摘要翻译： DC等离子体电弧发生器和操作方法，其包括分为电弧限制部分的大致圆柱形阳极和衬有耐火衬里的出口部分，并且具有临界尺寸和间隔，以允许引入涡流气流并且由此使主电弧稳定化 发电机的退化和侵蚀。
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公开(公告)号：US06376103B1
公开(公告)日：2002-04-23
申请号：US08865952
申请日：1997-05-30
申请人： Sanjay Sampath , Jack E. Vanderpool
发明人： Sanjay Sampath , Jack E. Vanderpool
IPC分类号： B32B1500
CPC分类号： C23C4/06 , C22C32/0052 , Y10T428/12826
摘要： A molybdenum-based composite powder for thermal spray applications. The composite powder includes a molybdenum-chromium, molybdenum-tungsten, or molybdenum-tungsten-chromium alloy dispersion strengthened with molybdenum carbide (Mo2C). The molybdenum-based composite powder may be combined with a nickel-based or cobalt-based alloy to form a two-phase powder blend. The coatings from such powders are made up of molybdenum-based alloy lamellae and, in the two-phase embodiments, nickel-based or cobalt-based alloy lamellae. The coatings exhibit improved corrosion resistance and strength while retaining good sprayability.
摘要翻译： 用于热喷涂应用的钼基复合粉末。 复合粉末包括用碳化钼（Mo2C）增强的钼铬，钼钨或钼 - 钨 - 铬合金分散体。 钼基复合粉末可以与镍基或钴基合金组合以形成两相粉末共混物。 这种粉末的涂层由钼基合金薄片制成，而在两相实施例中，镍基或钴基合金薄片组成。 涂层表现出改进的耐腐蚀性和强度，同时保持良好的喷涂性。
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公开(公告)号：US4743297A
公开(公告)日：1988-05-10
申请号：US33708
申请日：1987-04-03
CPC分类号： B22F1/0085 , B22F1/0007 , B22F2998/00 , Y10S75/954
摘要： A process is disclosed for producing metal flakes. The process involves entraining the metal powder particles in a carrier gas and passing the powder particles through a high temperature zone at a temperature above the melting point of the powder particles to melt at least about 50% of the powder particles, resolidifying the resulting high temperature treated material by impacting the material against a substrate, and thereafter contacting the material with a non-oxidizing gas which can be nitrogen, argon, hydrogen, helium or combinations of these to remove the material from the substrate in the form of flakes.
摘要翻译： 公开了一种用于生产金属薄片的方法。 该方法包括将金属粉末颗粒夹带在载气中，并使粉末颗粒在高于粉末颗粒熔点的温度下通过高温区域，以熔化至少约50％的粉末颗粒，将所得到的高温 然后将材料与非氧化性气体接触，所述非氧化性气体可以是氮气，氩气，氢气，氦气或这些材料的组合，以从薄片形式从衬底去除材料。
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公开(公告)号：US4755353A
公开(公告)日：1988-07-05
申请号：US33706
申请日：1987-04-03
CPC分类号： C23C4/185 , B22F1/0007 , B22F1/0096 , B22F2998/00 , Y10T428/12431
摘要： A process is disclosed for producing discontinuous metal foils. The process involves entraining metal powder particles in a carrier gas and passing the powder particles through a high temperature zone at a temperature above the melting point of the powder particles to melt at least about 50% by weight of the powder particles and thereafter resolidifying the resulting high temperature treated material by impacting the material against a substrate to form the foils.
摘要翻译： 公开了用于生产不连续金属箔的方法。 该方法包括将载体气体中的金属粉末颗粒夹带并使粉末颗粒在高于粉末颗粒的熔点的温度下通过高温区域，以熔化至少约50重量％的粉末颗粒，然后将所得 通过将材料冲击衬底以形成箔来进行高温处理的材料。
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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。
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公开(公告)号：US4816067A
公开(公告)日：1989-03-28
申请号：US208945
申请日：1988-06-20
CPC分类号： B22F1/0048
摘要： A process is disclosed for producing fine spherical particles from a fine powder feed material which comprises entraining the powder feed material in a carrier gas, introducing the feed material and carrier gas through a powder port into a high temperature zone and maintaining the powder feed material in the high temperature zone for a sufficient time to melt at least about 50% by weight of the particles of the powder and to form droplets therefrom while at the same time allowing one or more streams of gas to come into contact intermittently with any powder which has accumulated in the vicinity of the powder port to keep the vicinity clear of powder to allow the powder feed to pass unobstructively through the powder port into the high temperature zone. The droplets are then cooled to form spherical particles.
摘要翻译： 公开了一种用于从细粉进料中制备细球形颗粒的方法，该方法包括将粉末进料材料夹入载气中，将进料和载气通过粉末口引入高温区并将粉末进料保持在 高温区域足够的时间熔化至少约50重量％的粉末颗粒并从其形成液滴，同时允许一个或多个气体流与间接地与任何粉末接触的粉末接触 积聚在粉末端口附近以保持附近的粉末不透明，使得粉末进料通过粉末口无阻碍地进入高温区域。 然后将液滴冷却以形成球形颗粒。
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