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    Wear-resistant sintered alloy, and its production method
    7.
    发明公开
    Wear-resistant sintered alloy, and its production method 失效
    耐磨烧结合金及其制造方法

    公开(公告)号：EP0789088A1

    公开(公告)日：1997-08-13

    申请号：EP97300005.2

    申请日：1997-01-02

    申请人： HITACHI POWDERED METALS CO., LTD.

    发明人： Aonuma, Koichi ,  Aoki, Yoshimasa ,  Hayashi, Koichiro

    IPC分类号： C22C33/02

    CPC分类号： C22C33/0207 ,  C22C33/0257

    摘要： The invention provides a valve seat having a suitable degree of wear resistance, which can be produced without recourse to expensive elements represented by cobalt and at a cost lower than ever before. This valve seat is formed of a wear-resistant sintered alloy having a general composition consisting essentially of, in weight ratio, 0.736 to 9.65% of nickel, 0.736 to 2.895% of copper, 0.294 to 0.965% of molybdenum, 0.12 to 6.25% of chromium, and 0.508 to 2.0% of carbon with the balance being iron, and inevitable impurities, and having a metallic structure in which there are dispersed (1) a martensite, (2) a bainite having a nucleus of sorbite and/or upper bainite and surrounding said nucleus, (3) an austenite having a high nickel concentration, and (4) a hard phase surrounding with a ferrite having a high chromium concentration and composed mainly of a chromium carbide.

    摘要翻译： 本发明提供了一种具有合适的耐磨度的阀座，其可以不依靠以钴为代表的昂贵元件而以比以往更低的成本生产。 该阀座由耐磨性烧结合金形成，其具有的一般组成基本上由重量比为：镍为0.736至9.65％，铜为0.736至2.895％，钼为0.294至0.965％，钼为0.12至6.25％， 铬和0.508-2.0％的碳，其余为铁和不可避免的杂质，并且具有其中分散有（1）马氏体的金属结构，（2）具有索氏体和/或上贝氏体的核的贝氏体 （3）具有高镍浓度的奥氏体，和（4）围绕着具有高铬浓度并主要由碳化铬组成的铁素体的硬质相。

    Sintered metal parts and their production method
    10.
    发明公开
    Sintered metal parts and their production method 失效
    Sintermetallteile und Verfahren zur ihrer Herstellung。

    公开(公告)号：EP0481763A1

    公开(公告)日：1992-04-22

    申请号：EP91309543.6

    申请日：1991-10-16

    申请人： HITACHI POWDERED METALS CO., LTD.

    发明人： Ikenoue, Yutaka ,  Satoh, Ryoji ,  Hayashi, Koichiro ,  Chikahata, Katsunao

    IPC分类号： C22C32/00 ,  F16D69/02

    CPC分类号： C22C33/0228 ,  C22C32/0089 ,  F01L3/08 ,  F16C33/121

    摘要： A sintered metal part has a magnesium metasilicate mineral, or a magnesium metasilicate mineral and a magnesium orthosilicate mineral, or at least one of a magnesium metasilicate mineral and a magnesium orthosilicate mineral and at least one of boron nitride and manganese sulfide dispersed throughout the metal matrix. An iron-based sintered sliding member is of a structure that free graphite and an intercrystalline inclusion have been dispersed throughout the metal matrix that consists essentially of, in weight ratio, 1.5 to 4 % of carbon, 1 to 5 % of copper, 0.1 to 2 % of tin, 0.1 to 0.5 % of phosphorus, 0.5 to 2 % of an intercrystalline inclusion and the balance of Fe and has a mixed structure of a pearlite matrix with a steadite phase, the intercrystalline inclusion being a magnesium metasilicate mineral, or a magnesium metasilicate mineral and a magnesium orthosilicate mineral, or at least one of a magnesium metasilicate mineral and a magnesium orthosilicate mineral and at least one of boron nitride and manganese sulfide.

    摘要翻译： 烧结金属部件具有偏硅酸镁矿物或偏硅酸镁矿物和原硅酸镁矿物，或偏硅酸镁矿物和原硅酸镁矿物中的至少一种，以及分散在整个金属基质中的至少一种氮化硼和硫化锰 。 铁基烧结滑动构件具有自由石墨和晶间夹杂物分散在整个金属基体中的结构，其基本上以重量比为基准，1.5至4％的碳，1至5％的铜，0.1至 2％的锡，0.1〜0.5％的磷，0.5〜2％的晶间夹杂物和余量的Fe，并且具有珠光体基体与稳定相的混合结构，晶间夹杂物是偏硅酸镁矿物，或 偏硅酸镁矿物和原硅酸镁矿物，或偏硅酸镁矿物和原硅酸镁矿物中的至少一种以及氮化硼和硫化锰中的至少一种。