A method and apparatus for producing a hydrogen absorption alloy
    63.
    发明公开
    A method and apparatus for producing a hydrogen absorption alloy 失效
    一种生产氢吸收合金的方法和装置

    公开(公告)号:EP0510918A3

    公开(公告)日:1993-09-08

    申请号:EP92303569.5

    申请日:1992-04-22

    Abstract: A hydrogen absorption alloy with a high percentage of alloy is economically produced by the following method: (1) placing two or more kinds of fine metal particles M such as Mg and Ni adapted to form a hydrogen absorption alloy by alloying together with milling balls B in mill pots (21) of a high speed ball mill; (2) providing the internal part of the mill pots with a non-oxidising atmosphere; and (3) applying a composite milling acceleration ratio G of at least 30 to the internal part of each mill pot and setting the angular velocity ratio R of the revolution of the main shaft to the rotation of each mill pot to 1.9 or less, the composite milling acceleration ratio G being expressed by G= a max/g = (ω₁)²/ [ 2g (K+N)(1+R)² ]
    where
    G : composite milling acceleration ratio; a max : composite milling acceleration (m/s²); g : acceleration of gravity (m/s²); ω₁ : angular velocity of revolution of the main shaft (1/S); K : revolutional diameter (m); N : internal diameter of mill pot (m); ω₂ : relative angular velocity of rotation of each mill pot with respect to the revolution of the main shaft (1/s); and R : ω₂/ω₁.

    SINTERED ALLOY STEEL WITH EXCELLENT CORROSION RESISTANCE AND PROCESS FOR ITS PRODUCTION
    64.
    发明公开
    SINTERED ALLOY STEEL WITH EXCELLENT CORROSION RESISTANCE AND PROCESS FOR ITS PRODUCTION 失效
    GESINTERTER LEGIERUNGSSTAHL MIT AUSGEZEICHNETEM KORROSIONSWIDERSTAND UND VERFAHREN ZUR HERSTELLUNG。

    公开(公告)号:EP0378702A1

    公开(公告)日:1990-07-25

    申请号:EP89907304.3

    申请日:1989-06-27

    Abstract: The invention provides a process for producing sintered alloy steel with excellent corrosion resistance, which comprises step (1) of mixing powdery stainless steel with a binder and, after molding, removing the binder from the molding by heating, step (2) of sintering the molding under a reduced pressure of 30 Torr or less, and step (3) of resin- tering it in a non-oxidative atmosphere under substantially ordinary pressure at temperatures higher than that of the foregoing steps (1) and (2). The invention also provides a sintered alloy steel with excellent corrosion resistance, which has a stainless steel composition and a density ratio of 92 % or more and maximum pore size of voids existing in the structure of 20 µm or less, and in which the Cr content of the surface of the sinter in an as-sintered state is 80 % or more of that of the interior of the sinter.

    Abstract translation: 改进的烧结合金钢是通过(1)将粉末状不锈钢与粘合剂混合,成型并加热除去粘合剂,(2)在1000-1350℃的30托或更低的减压下烧结成型而制造的, 和(3)将其在非氧化性大豆中树脂化。 例如。 mixt。 惰性气体 氮气,常温常温下 高于(1)和(2),1250-1400℃。 粉末状不锈钢的平均颗粒尺寸小于15微米。 当通过在(1)加热从模制品中除去粘合剂时,模塑件的C / O摩尔比被调节到0.3-3.0。 在(2)将C / O摩尔比调节至0.3-3.0。 县。 粉末状不锈钢含有Cr(16-25重量%)和Ni(8-24重量%)。 Obtd。 不锈钢合金钢具有以下性能:不锈钢组合物,密度比为92%以上,最大。 组织中孔的半径在20微米以内。 阿姆特 在烧结合金钢表面的Cr为80%以上。 的Cr在内部。

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