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    Method for forming large-size QCr0.8 alloy tapered cylindrical ring
    6.
    发明授权
    Method for forming large-size QCr0.8 alloy tapered cylindrical ring 有权

    公开(公告)号：US11684965B2

    公开(公告)日：2023-06-27

    申请号：US17528343

    申请日：2021-11-17

    申请人： Xi'an Space Engine Company Limited

    发明人： Jing Zhang ,  Jinwu Miao ,  Yanpei Shi ,  Kai Wang ,  Zhimin Chen ,  Yang Ding ,  Guojin Zhang

    IPC分类号： B21D53/16 ,  B21J5/02 ,  C22C9/02

    CPC分类号： B21D53/16 ,  B21J5/02 ,  C22C9/02

    摘要： A method for forming a QCr0.8 alloy tapered cylindrical ring, including: heating a standard QCr0.8 alloy cylindrical part followed by upsetting and stretching at least twice to obtain a primary blank; heating the primary blank followed by upsetting and chamfering to obtain a secondary blank, where a diameter of a top end is greater than that of a bottom end; subjecting the secondary blank to backward extrusion to form a preform; machining the preform to remove a flash and a bottom residue; subjecting a bottom end of the preform to local bulging to enable a shape and a size thereof to match that of a drive roller in a forming tooling, so as to form a profiled ring blank; and rolling the profiled ring blank by a radial-axial ring rolling machine with the forming tooling to form the tapered cylindrical ring.

    Metal alloys for hydraulic applications
    7.
    发明授权
    Metal alloys for hydraulic applications 有权

    公开(公告)号：US11649527B2

    公开(公告)日：2023-05-16

    申请号：US17152168

    申请日：2021-01-19

    申请人： Robert Bosch GmbH

    发明人： Soo Kim ,  Michael Weathersbee ,  Charles Tuffile

    IPC分类号： C22C9/02

    CPC分类号： C22C9/02

    摘要： A wear resistant hydraulics system includes a first copper-based alloy having a formula (I), CuaSnbZncMd, where M is a combination of up to six transition metals, metalloids, and/or alkali metals, a is any number between 0.50 and 0.93, b is any number between 0.00 and 0.07, c is any number between 0.00 and 0.40, and d is any number between 0.01 and 0.40, and a second copper-based alloy including at least 50 wt. % of Cu, based on the total weight of the alloy; and at least one compound of formula (II) AxBy, where A is Cu, Sn, or Zn, B is Co, Cr, In, Mn, Mo, Ni, Rb, Sb, Te, or Ti, x is any number between 1 and 53, and y is any number between 1 and 16, the first or second alloy having a bulk modulus KVRH value of about 70 to 304 GPa.

    METAL ALLOYS FOR HYDRAULIC APPLICATIONS
    9.
    发明申请
    METAL ALLOYS FOR HYDRAULIC APPLICATIONS 有权

    公开(公告)号：US20220228238A1

    公开(公告)日：2022-07-21

    申请号：US17152168

    申请日：2021-01-19

    申请人： Robert Bosch GmbH

    发明人： Soo KIM ,  Michael WEATHERSBEE ,  Charles TUFFILE

    IPC分类号： C22C9/02

    摘要： A wear resistant hydraulics system includes a first copper-based alloy having a formula (I), CuaSnbZncMd, where M is a combination of up to six transition metals, metalloids, and/or alkali metals, a is any number between 0.50 and 0.93, b is any number between 0.00 and 0.07, c is any number between 0.00 and 0.40, and d is any number between 0.01 and 0.40, and a second copper-based alloy including at least 50 wt. % of Cu, based on the total weight of the alloy; and at least one compound of formula (II) AxBy, where A is Cu, Sn, or Zn, B is Co, Cr, In, Mn, Mo, Ni, Rb, Sb, Te, or Ti, x is any number between 1 and 53, and y is any number between 1 and 16, the first or second alloy having a bulk modulus KVRH value of about 70 to 304 GPa.

    Sliding member
    10.
    发明授权
    Sliding member 有权

    公开(公告)号：US11215227B2

    公开(公告)日：2022-01-04

    申请号：US16931704

    申请日：2020-07-17

    申请人： DAIDO METAL COMPANY LTD.

    发明人： Masahiro Nakai

    IPC分类号： F16C33/12 ,  B32B15/01 ,  C22C9/00 ,  C22C9/02 ,  B22D19/08 ,  B22D19/00 ,  B22D13/02

    摘要： A sliding member includes a back-metal layer including an Fe alloy and a sliding layer including a copper alloy including 0.5 to 12 mass % of Sn and the balance of Cu and inevitable impurities. A cross-sectional structure of the sliding layer includes first copper alloy grains in contact with a bonding surface and second copper alloy grains not in contact with the bonding surface. The first and second grains have an average grain size D1 and D2 respectively. D1 is 30 to 80 μm; and D1/D2=0.1 to 0.3. In the cross-sectional structure, the second grains includes third grains that includes internal grains therein that are not in contact with a grain boundary of the third grains. A total area S1 of the third grains and a total area of the second copper alloy grains S2 satisfy: S0/S2=0.25 to 0.80.