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    Powder metallurgy articles
    72.
    发明公开
    Powder metallurgy articles 无效
    Nach powdermetallurgischem Verfahren hergestellteFormkörper。

    公开(公告)号：EP0076027A2

    公开(公告)日：1983-04-06

    申请号：EP82304064.7

    申请日：1982-08-02

    申请人： CRUCIBLE MATERIALS CORPORATION

    发明人： Haswell, Walter T. ,  Stasko, William

    IPC分类号： C22C38/24 ,  C22C33/02 ,  B21B1/00

    CPC分类号： C22C33/0278 ,  B21B27/00

    摘要： A powder metallurgy article, e.g., a hot working roll or tool or a high toughness cold work tool such as a shear blade or slitter knife, formed from compacted prealloyed powder of an alloy consiting of, in weight percent, manganese 0.2 to 1.5, silicon 2 max., chromium 1.5 to 6, molybdenum 0.50 to 6, sulfur 0.30 max., vanadium 7 to 10, carbon expressed by the formula (.25 minimum, .40 maximum + .16 x percent vanadium), optical carbide forming elements such as tungsten and niobium in amounts up to 5 percent (with the corresponding stoichiometric carbon required for balance) may partially replace vanadium, optional cobalt additions may be included for heat resistance and balance iron and incidental impurities; the article is characterised by a fully martensitic structure with essentially no carbon in the steel matrix in excess of the carbon necessary to combine with the vanadium present to form vanadium carbides and to ensure said fully martensitic structure.

    摘要翻译： 一种粉末冶金制品，例如热加工辊或工具或高韧性冷作业工具，例如剪切刀或分切刀，由按重量百分比计的锰0.2至1.5的合金的压实预合金粉末形成，硅0.2至1.5 最大为2，铬1.5至6，钼0.50至6，硫0.30最大，钒为7至10，由式（.25最小值，最大值最大值±.0.4％）表示的碳，光学碳化物形成元素 因为钨和铌的含量高达5％（具有平衡所需的相应的化学计量碳）可以部分替代钒，可以包括任选的钴添加剂用于耐热性和平衡铁和杂质; 该制品的特征在于完全马氏体结构，钢基体中基本上不含碳，超过与存在的钒结合形成碳化钒所必需的碳，并确保所述完全马氏体结构。

    Method for producing forged iron-nickel-base superalloys
    75.
    发明公开
    Method for producing forged iron-nickel-base superalloys 审中-公开
    Verfahren zur Herstellung von geschmiedeten Erzeugnissen aus Eisen-Nickel Superlegierungen

    公开(公告)号：EP0953653A1

    公开(公告)日：1999-11-03

    申请号：EP99810326.1

    申请日：1999-04-20

    申请人： CRUCIBLE MATERIALS CORPORATION

    发明人： Conway, John J. ,  Rizzo, Frank J. ,  Habel, Ulrike

    IPC分类号： C22C33/02 ,  C22C1/04

    CPC分类号： C22F1/10 ,  B22F2998/10 ,  C21D8/005 ,  C22C1/0433 ,  C22C30/00 ,  C22C33/0285 ,  C22C38/00 ,  B22F9/082 ,  B22F3/15 ,  B22F3/17

    摘要： Two P/M versions of the Superalloy 706 have been produced by argon and nitrogen atomization. Both have a very fine and homogeneous microstructure with grain sizes of ASTM No. 6 to 12 depending on thermo-mechanical treatment. The compacted P/M 706 contains discrete titanium-, niobium- and titanium-niobium-carbonitride compounds which pin grain boundaries during thermo-mechanical treatment. Nitrogen-atomized P/M 706 contains more frequent and larger carbonitrides that argon-atomized P/M 706. P/M 706 shows very moderate grain growth even after annealing at temperatures up to 2200°F due to grain boundary pinning by the carbonitride precipitates. Due to its higher content of precipitates, nitrogen-atomized P/M 706 has a finer grain size than argon-atomized P/M 706.

    摘要翻译： 通过氩气和氮气雾化产生了两种P / M版本的超合金706。 两者都具有非常精细和均匀的微结构，其晶粒尺寸为ASTM 6-12，这取决于热机械处理。 压实的P / M 706包含在热机械处理期间引起晶界的分立的钛，铌和铌 - 碳氮化物化合物。 氮雾化的P / M 706含有更多的和较大的碳氮化物，氩气雾化的P / M 706.P / M 706即使在高达2200°F的温度下退火后也显示出非常适度的晶粒生长，这是由于碳氮化物沉淀物的晶界钉扎 。 由于其较高含量的沉淀物，氮雾化的P / M 706具有比氩气雾化的P / M 706精细的晶粒尺寸。

    Method for vacuum loading steel powder into a mold
    78.
    发明公开
    Method for vacuum loading steel powder into a mold 失效
    Verfahren zumFülleneiner Pressform unter vacuum mit Stahlpulver

    公开(公告)号：EP0799662A2

    公开(公告)日：1997-10-08

    申请号：EP97302283.3

    申请日：1997-04-03

    申请人： CRUCIBLE MATERIALS CORPORATION

    发明人： Rhodes, Terry C. ,  Rizzo, Frank J. ,  Brinzer, Henry E. Jr.

    IPC分类号： B22F3/00

    CPC分类号： B30B15/302 ,  B22F3/004 ,  B22F2201/20 ,  B22F2998/00 ,  B22F2999/00 ,  B30B15/0017 ,  B22F3/02 ,  B22F3/15

    摘要： A method and apparatus for loading tool steel and high speed steel powder to a deformable mold (14) for compacting is disclosed. The particles are exposed to a uniform vacuum during transfer from a sealed container (10) through a sealed conduit (12) and into a sealed deformable mold (14). By this method and apparatus, the particles are uniform throughout the container (14) and substantially free of impurities, without requiring conventional outgassing.

    摘要翻译： 公开了一种用于将工具钢和高速钢粉加载到用于压实的可变形模具（14）上的方法和装置。 在从密封容器（10）通过密封导管（12）转移到密封的可变形模具（14）中时，颗粒暴露于均匀的真空。 通过该方法和装置，颗粒在整个容器（14）中是均匀的，并且基本上没有杂质，而不需要常规的除气。

    Method for producing titanium particles
    79.
    发明公开
    Method for producing titanium particles 失效
    生产钛颗粒的方法

    公开(公告)号：EP0587258A3

    公开(公告)日：1994-07-27

    申请号：EP93203372.3

    申请日：1990-08-24

    申请人： CRUCIBLE MATERIALS CORPORATION

    发明人： Yolton, Charles F.

    IPC分类号： B22F9/08

    CPC分类号： B22F9/082 ,  B22F9/08 ,  B22F2009/0848 ,  B22F2009/0856 ,  B22F2009/0892

    摘要： Titanium is induction melted to produce a molten mass thereof and a water-cooled crucible (10) have a nonoxidizing atmosphere and a bottom opening (22). The current to the coil (30) used for induction melting is adjusted to produce a levitation effect on the molten mass (34) in the crucible (10) to prevent the molten mass (34) from flowing out of the bottom opening (22). The molten mass (34) is also maintained out-of-contact with the crucible (10) by providing a solidified layer (36) of titanium between the molten mass (34) and the crucible (10). After production of the molten mass (34) of titanium, the current to the induction coil (30) is reduced to reduce the levitation effect and allow the molten mass (34) to flow out of the bottom opening (22) of the crucible (10) as a free-falling stream (38) of molten titanium. The free-falling stream (38) from the crucible is directed to a tundish (48) from which the molten mass flows through a nozzle (54) for atomization. The spherical particles (42) produced by atomization are cooled to solidify them and are then collected.

    摘要翻译： 钛被感应熔化以产生熔融物质，以及具有非氧化气氛和底部开口的水冷坩埚（10）。 调节用于感应熔融的线圈（30）的电流以对坩埚中的熔融物质产生悬浮效应，以防止熔融物质流出底部开口（22）。 通过在熔融物料和坩埚之间提供凝固的钛层，熔融物质也保持与坩埚的不接触。 在生产熔融物质的钛之后，减小到感应线圈的电流以降低悬浮效应，并允许熔融物质作为自由落下的熔融钛流从坩埚的底部开口流出。 用惰性气体射流冲击该流以雾化熔融的钛以形成球形颗粒。 将球形颗粒冷却以固化它们，然后收集。 来自坩埚的自由流动的物流可以被引导到中间包，熔融物质从该中间包流过用于雾化的喷嘴。 钛可以被熔化，以便在坩埚外形成熔融物质，然后将熔融物质引入坩埚中。