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公开(公告)号：US5121026A
公开(公告)日：1992-06-09
申请号：US603090
申请日：1990-10-25
IPC分类号： H01T13/39
CPC分类号： H01T13/39
摘要： The center electrode of an ignition plug is a unitary cylindrical tungsten rod in which the outer peripheral portion thereof has a higher work function than the core portion.
摘要翻译： 火花塞的中心电极是一体的圆柱形钨棒，其外周部分具有比芯部更高的功函数。
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公开(公告)号：US4859236A
公开(公告)日：1989-08-22
申请号：US185644
申请日：1988-04-25
摘要： A process is disclosed for producing molybdenum-ruthenium metal powder which comprises forming an ammonium molybdate solution, heating that solution to drive off excess ammonia, and thereafter adding ruthenium dioxide to that heated ammonium molybdate solution to form a slurry of ruthenium dioxide in the ammonium molybdate solution. Molybdenum trioxide and ruthenium dioxide are then crystallized from the slurry to produce a uniform mixture of molybdenum trioxide and ruthenium dioxide which is heated at a temperature of from about 300.degree. C. to about 800.degree. C. for a sufficient time in a reducing atmosphere to reduce the molybdenum trioxide and ruthenium dioxide to their respective metals and form a uniform mixture of the metals. The metal mixture is heated at a temperature of from about 800.degree. C. to about 1200.degree. C. for a sufficient time in a reducing atmosphere to stabilize the mixture at a particle size of -325 mesh, and then cooled in a non-reacting atmosphere.
摘要翻译： 公开了用于生产钼 - 钌金属粉末的方法，其包括形成钼酸铵溶液，加热该溶液以驱除多余的氨，然后向该加热的钼酸铵溶液中加入二氧化钌以在钼酸铵中形成二氧化钌的浆液 解。 然后将三氧化钼和二氧化钌从浆料中结晶，以产生三氧化钼和二氧化钌的均匀混合物，其在约300℃至约800℃的温度下在还原气氛中加热足够的时间， 将三氧化钼和二氧化钌还原成各自的金属，并形成均匀的金属混合物。 将金属混合物在约800℃至约1200℃的温度下在还原气氛中加热足够的时间以将混合物稳定在-325目的粒度，然后以不反应 大气层。
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公开(公告)号：US5604321A
公开(公告)日：1997-02-18
申请号：US507184
申请日：1995-07-26
CPC分类号： H01K1/10 , C22C1/10 , C22C1/1026 , C22C32/0031 , C22F1/18
摘要： A wire for fabrication of a vibration resistant filament for an incandescent lamp. The wire includes about 0.05-1.00 weight percent lanthanum oxide dispersed in a tungsten matrix and has a microstructure including stringers of fine particles of lanthanum oxide extending parallel to the wire axis. During primary recrystallization of a vibration resistant lamp filament from the filament wire, the stringers produce a microstructure in the filament exhibiting sufficient grain boundary segments extending generally axially along the length of the filament to render the filament resistant to vibration. A method for producing a vibration resistant filament for an incandescent lamp is also disclosed.
摘要翻译： 用于制造用于白炽灯的抗振丝的线。 导线包括分散在钨基体中的约0.05-1.00重量％的氧化镧，并且具有包括平行于线轴延伸的氧化镧的细颗粒的微结构。 在从灯丝丝中防振灯丝的一次再结晶过程中，桁条在细丝中产生显微组织，表现出足够的晶界段，其沿着灯丝的长度大致沿轴向延伸，从而使灯丝抵抗振动。 还公开了一种用于生产用于白炽灯的抗振灯丝的方法。
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公开(公告)号：US6129890A
公开(公告)日：2000-10-10
申请号：US391121
申请日：1999-09-07
CPC分类号： H01K3/02 , C22B34/36 , C22C1/045 , H01K1/08 , B22F2998/10
摘要： It has been discovered that potassium retention in NS tungsten processing may be improved by double doping tungsten blue oxide (TBO) prior to reduction. The novel `double-doping` process consists of dry doping standard singly doped K--Al--Si TBO with potassium nitrate, KNO.sub.3, followed by the standard reduction, acid washing, sintering, rolling and drawing steps. In another aspect, the novel method includes an aqueous extraction of heteropolytungstate anion [SiW.sub.11 O.sub.39 ].sup.8- from a sample of the singly doped tungsten blue oxide to predict potassium retention.
摘要翻译： 已经发现，通过在还原之前的双掺杂钨蓝氧化物（TBO）可以改善NS钨处理中的钾保留。 新型“双掺杂”工艺由干掺杂标准的单掺杂K-Al-Si TBO与硝酸钾KNO3组成，接着进行标准还原，酸洗，烧结，轧制和拉伸步骤。 另一方面，该新方法包括从单掺杂的钨蓝氧化物的样品中提取杂多钨酸阴离子[SiW11O39] 8-来预测钾的保留。
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公开(公告)号：US5742891A
公开(公告)日：1998-04-21
申请号：US628221
申请日：1996-04-04
CPC分类号： H01K1/10 , C22C1/10 , C22C1/1026 , C22C32/0031 , C22F1/18
摘要： A wire for fabrication of a vibration resistant filament for an incandescent lamp. The wire includes about 0.05-1.00 weight percent lanthanum oxide dispersed in a tungsten matrix and has a microstructure including stringers of fine particles of lanthanum oxide extending parallel to the wire axis. During primary recrystallization of a vibration resistant lamp filament from the filament wire, the stringers produce a microstructure in the filament exhibiting sufficient grain boundary segments extending generally axially along the length of the filament to render the filament resistant to vibration. A method for producing a vibration resistant filament for an incandescent lamp is also disclosed.
摘要翻译： 用于制造用于白炽灯的抗振丝的线。 导线包括分散在钨基体中的约0.05-1.00重量％的氧化镧，并且具有包括平行于线轴延伸的氧化镧的细颗粒的微结构。 在从灯丝丝中防振灯丝的一次再结晶过程中，桁条在细丝中产生显微组织，表现出足够的晶界段，其沿着灯丝的长度大致沿轴向延伸，从而使灯丝抵抗振动。 还公开了一种用于生产用于白炽灯的抗振灯丝的方法。
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7.发明授权Process for producing molybdenum and tungsten alloys containing metal carbides 失效含有金属碳化物的钼和钨合金的生产方法
公开(公告)号：US4670216A
公开(公告)日：1987-06-02
申请号：US911602
申请日：1986-09-25
摘要： A three step process in which a metal alloy selected from a tungsten based alloy and molybdenum based alloys is provided to prevent the decarbonization of the alloys. The process involves a three step sintering process wherein the atmosphere during the initial heating step is a mixture of carbon monoxide and hydrogen, thereafter at a intermediate temperature range the atmosphere is hydrogen and a final heating step at a elevated temperature is employed and the atmosphere is a mixture of inert gas and a source of carbon.
摘要翻译： 提供选自钨基合金和钼基合金的金属合金以防止合金脱碳的三步法。 该方法包括三步骤烧结方法，其中初始加热步骤期间的气氛是一氧化碳和氢气的混合物，之后在中等温度范围内，气氛为氢气，并且采用升高的温度下的最终加热步骤 惰性气体和碳源的混合物。
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公开(公告)号：US5590386A
公开(公告)日：1996-12-31
申请号：US507183
申请日：1995-07-26
CPC分类号： B23K35/327 , B22F3/23 , B23K35/222 , B23K35/402 , C22C1/1005 , B22F2998/00 , B22F2998/10 , B22F2999/00
摘要： In a method of making alloy of tungsten and lanthana, lanthanum hydroxide is blended with tungsten metal powder, the mixture is pressed to form a pressed ingot, optionally presintered, and sintered to form the alloy. The use of lanthanum hydroxide as the source of the lanthana dopant allows the pressed or presintered ingots to be stored in air prior to sintering for prolonged periods without becoming degraded from exposure to atmospheric moisture.
摘要翻译： 在制造钨和镧的合金的方法中，将氢氧化镧与钨金属粉末混合，将该混合物压制成可以任意预烧结的压铸锭，并烧结以形成合金。 使用氢氧化镧作为镧掺杂剂的来源允许压制或预烧的锭在烧结之前长时间储存在空气中而不会暴露于大气湿气中而降解。
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公开(公告)号：US4717538A
公开(公告)日：1988-01-05
申请号：US935910
申请日：1986-11-28
IPC分类号： C22C27/04
CPC分类号： C22C27/04
摘要： A molybdenum-tungsten-titanium-zirconium-carbon alloy system is disclosed having a composition in percent by weight of from about 0.01 to about 0.15 carbon, from about 0.06 to about 0.20 zirconium, from about 0.40 to about 0.75 titanium, from about 10 to about 60 tungsten, and the balance molybdenum.
摘要翻译： 公开了一种钼 - 钨 - 钛 - 锆 - 碳合金体系，其组成为约0.01至约0.15碳，约0.06至约0.20锆，约0.40至约0.75钛，约10至 约60钨，余量为钼。
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公开(公告)号：US06830637B2
公开(公告)日：2004-12-14
申请号：US10160751
申请日：2002-05-31
IPC分类号： C22C2704
CPC分类号： C22C27/04 , B22F3/16 , B22F2003/185 , B22F2003/248 , B22F2998/10 , C22C32/0031 , B22F3/02 , B22F3/10 , B22F3/18 , B22F3/24
摘要： A large-diameter tungsten-lanthana rod having an elongated grain structure substantially parallel to the longitudinal axis of the rod is described. The large diameter rod is produced by rolling at a temperature greater than 1400° C. and less than 1700° C. to achieve at least about a 40% reduction in cross-sectional area. The high strength of the longitudinally elongated grain structure is desirable for applications such as rocket nozzles.
摘要翻译： 描述了具有基本上平行于棒的纵向轴线的细长晶粒结构的大直径钨 - 镧棒。 大直径杆通过在大于1400℃和小于1700℃的温度下轧制而产生，以实现至少约40％的横截面积减小。 纵向细长的晶粒结构的高强度对于诸如火箭喷嘴的应用是理想的。
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