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    Material for the powder-metallurgical production of shaped parts, in particular valve seat rings or valve guides with high resistance to wear
    1.
    发明授权
    Material for the powder-metallurgical production of shaped parts, in particular valve seat rings or valve guides with high resistance to wear 失效
    用于粉末冶金生产成形零件的材料，特别是阀座环或具有高耐磨性的阀导轨

    公开(公告)号：US6039785A

    公开(公告)日：2000-03-21

    申请号：US125612

    申请日：1998-10-15

    申请人： Kirit Dalal ,  Ekkehard Kohler ,  Anil V. Nadkarni

    发明人： Kirit Dalal ,  Ekkehard Kohler ,  Anil V. Nadkarni

    IPC分类号： B22F1/00 ,  B22F5/00 ,  C22C1/04 ,  C22C9/00 ,  C22C9/01 ,  C22C32/00 ,  C22C1/05

    CPC分类号： B22F1/0003 ,  C22C32/0021

    摘要： The invention concerns a material for the powder-metallurgical production from a powder mixture containing at least approximately 50 wt. % copper in particular of valve seat rings or valve guides with high resistance to wear and corrosion and high heat conductivity. The starting powder mixture consists of between 50 and 90 wt. % of a basic powder, containing the copper portion, and between 10 and 50 wt. % of a powdery molybdenum-containing alloy flux. The basic powder is a copper powder which is dispersion-hardened by Al.sub.2 O.sub.3, has an Al.sub.2 O.sub.3 content of between 0.1 and 1.1 wt. %, and is produced by pulverizing a Cu--Al melt followed by heating in an oxidizing atmosphere. The invention further concerns the use of a dispersion-hardened powder of this type for the powder-metallurgical production in particular of wear and corrosion-resistant valve seat rings or valve guides with high heat conductivity. Finally, the invention concerns a method of producing such valve seat rings or valve guides.

    摘要翻译： PCT No.PCT / EP97 / 00837 371日期：1998年10月15日 102（e）日期1998年10月15日PCT 1997年2月21日PCT PCT。 公开号WO97 / 30808 PCT 日期：1997年8月28日本发明涉及一种粉末冶金生产材料，该粉末混合物含有至少约50wt。 ％铜，特别是阀座环或阀导轨，具有高耐磨损和高导热性。 起始粉末混合物由50至90wt。 含有铜部分的基础粉末的％，以及10至50重量％ ％的含钼的合金粉末。 碱性粉末是通过Al2O3分散硬化的铜粉末，Al 2 O 3含量为0.1〜1.1重量％。 ％，并且通过将Cu-Al熔体粉碎，然后在氧化气氛中加热来制备。 本发明还涉及使用这种类型的分散硬化粉末用于粉末冶金生产，特别是具有高导热性的耐磨损和耐腐蚀阀座环或导阀。 最后，本发明涉及一种生产这种阀座环或阀引导件的方法。

    Method for mounting and finishing valve seat rings pre-manufactured by powder metallurgical method techniques
    5.
    发明授权
    Method for mounting and finishing valve seat rings pre-manufactured by powder metallurgical method techniques 失效
    通过粉末冶金方法技术预先制造的安装和修整阀座环的方法

    公开(公告)号：US5735043A

    公开(公告)日：1998-04-07

    申请号：US623488

    申请日：1996-03-28

    申请人： Holger Schmidt ,  Gerd Kruger

    发明人： Holger Schmidt ,  Gerd Kruger

    IPC分类号： B22F7/06 ,  F01L3/22 ,  B23P11/00

    CPC分类号： B22F7/062 ,  F01L3/22 ,  B22F2999/00 ,  Y10T29/47 ,  Y10T29/49272 ,  Y10T29/49306

    摘要： In a method for mounting and finishing a valve seat ring in an operational position of a receiving bore at the entrance of a gas channel of the cylinder head of an internal combustion engine consisting of a light alloy, an annular body with a central opening is manufactured by powder pressing and sintering. A roller burnishing tool is positioned within the central of the annular body. The annular body is inserted into the receiving bore with the aid of the roller burnishing tool such that the annular body is positioned with play relative the inner wall of the receiving bore. The annular body is radially expanded by roller burnishing with the roller burnishing tool such that the annular body positive-lockingly engages the inner wall of the receiving bore and is compressed to a selected finish size of ready-to-use density.

    摘要翻译： 在用于在由轻合金构成的内燃机的气缸盖的气体通道的入口处的接收孔的操作位置安装和修整阀座环的方法中，制造具有中心开口的环形体 通过粉末压制和烧结。 辊抛光工具位于环形体的中心内。 借助于滚筒抛光工具将环形体插入接收孔中，使得环形体相对于容纳孔的内壁定位成游隙。 环形体通过滚筒抛光工具通过滚筒抛光而径向膨胀，使得环形体正向锁定地接合接收孔的内壁并被压缩成所选择的即用型密度的精加工尺寸。