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    LASER REMELTING TO ENHANCE CYLINDER BORE MECHANICAL PROPERTIES
    51.
    发明申请
    LASER REMELTING TO ENHANCE CYLINDER BORE MECHANICAL PROPERTIES 审中-公开

    公开(公告)号：US20180283310A1

    公开(公告)日：2018-10-04

    申请号：US15478741

    申请日：2017-04-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Huaxin Li ,  Daniel J. Wilson ,  Martin S. Kramer ,  Dale A. Gerard

    IPC: F02F1/00 ,  C23C4/12 ,  C23C4/18 ,  C23C4/06 ,  C23C28/02 ,  F02F7/00

    Abstract: An engine block, an automotive structure, and a method of coating an inner surface of an engine cylinder bore of an engine cylinder are provided. The method includes providing an inner bore substrate defining an inner surface of the engine cylinder bore, the inner bore substrate being formed of a first material. The method further includes disposing a thermal spray coating onto the inner surface of the engine cylinder bore. The thermal spray coating is formed of a second material that is different than the first material. The method also includes melting at least a portion of the thermal spray coating with a laser after performing the step of disposing the thermal spray coating onto the inner surface of the engine cylinder bore. The automotive structure and the engine block have a substrate covered by a thermal spray coating and laser remelted sections anchoring the coating to the substrate.

    CONDUCTIVE CABLE FOR A BATTERY ELECTRIC VEHICLE
    54.
    发明申请
    CONDUCTIVE CABLE FOR A BATTERY ELECTRIC VEHICLE 有权

    公开(公告)号：US20240395438A1

    公开(公告)日：2024-11-28

    申请号：US18322211

    申请日：2023-05-23

    Applicant: GM Global Technology Operations LLC

    Inventor： Yi Liu ,  Qigui Wang ,  Huaxin Li ,  Kestutis A. Sonta ,  Daniel J. Wilson

    IPC: H01B1/02 ,  H01B1/04 ,  H01B5/08

    Abstract: A conductive cable for a battery electric vehicle is provided. The conductive cable comprises a plurality of first members in alignment to define a longitudinal axis of the conductive cable. Each first member comprises a first conductive wire about which a first outer layer is disposed for electric current to flow therethrough relative to the longitudinal axis. The first outer layer comprises a first metal substrate having a first side and an opposite second side. The first outer layer comprises a first copper-graphene (Cu-Gr) multilayer composite disposed on the first side and a second Cu-Gr multilayer composite disposed on the second side of the first metal substrate. Each first conductive wire comprises a first metallic material. The plurality of first members is disposed together along the longitudinal axis to define a cable bundle. The conductive cable further comprises a non-conductive layer disposed about the cable bundle.

    System and method of making a die cast part having high wear resistance
    56.
    发明授权
    System and method of making a die cast part having high wear resistance 有权

    公开(公告)号：US11890672B1

    公开(公告)日：2024-02-06

    申请号：US18161443

    申请日：2023-01-30

    Applicant: GM Global Technology Operations LLC

    Inventor： Zhe Li ,  Qigui Wang ,  Wenying Yang ,  Daniel J. Wilson ,  Huaxin Li

    IPC: B22D17/00 ,  B22D21/00 ,  B22D27/02 ,  B22D17/02

    CPC classification number: B22D17/02 ,  B22D21/007 ,  B22D27/02

    Abstract: A method of making a die cast part having high wear resistance is provided. The method comprises providing a mold and an insert pin. The mold comprises an interior surface defining a cavity. The mold comprises a bore formed through the interior surface. The insert pin has a magnetic core having a magnetic field and a barrier disposed about the magnetic core. The insert pin is disposed in the bore and extends into the cavity. The method comprises filling the mold with metallic material such that the metallic material is in contact with the insert pin to define a contact layer. The method comprises modifying iron content within the contact layer with the magnetic field to define an outer layer and an inner layer formed between the outer layer and the insert pin. The inner layer has 3-5 wt % Fe and the outer layer has 0.01-0.5 wt % Fe.

    Valve seat for automotive cylinder head
    58.
    发明授权
    Valve seat for automotive cylinder head 有权

    公开(公告)号：US11639672B2

    公开(公告)日：2023-05-02

    申请号：US17101425

    申请日：2020-11-23

    Applicant: GM Global Technology Operations LLC

    Inventor： Daniel J. Wilson ,  Huaxin Li ,  Edward J. Keating ,  Liang Wang ,  Devin R. Hess

    IPC: F01L3/02 ,  C22C9/06 ,  B23K35/30 ,  B23K26/34 ,  B23K103/12

    Abstract: A valve seat formed within an aluminum engine component includes a valve seat surface machined within the aluminum engine component, a layer of copper alloy material laser clad onto the valve seat surface of the aluminum engine component, the layer of copper alloy material having a thickness of less than 2.0 millimeters, and a layer of copper alloy/tool steel carbide material laser clad onto the layer of copper alloy material, the layer of copper alloy/tool steel carbide material having an average thickness of less than 0.5 millimeters, wherein the layer of copper alloy/tool steel carbide material has an outer surface that is machined to a final valve seat profile.

    Laser welding steel to ductile iron
    60.
    发明授权
    Laser welding steel to ductile iron 有权

    公开(公告)号：US11517980B2

    公开(公告)日：2022-12-06

    申请号：US16269147

    申请日：2019-02-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Huaxin Li ,  Sen J. Zhou

    IPC: B23K26/32 ,  B23K26/26 ,  B23K26/354 ,  B23K26/062 ,  B23K103/04 ,  B23K103/06

    Abstract: A method of laser welding a steel substrate and a ductile iron substrate is disclosed along with a laser welded assembly that may be formed by practicing the disclosed method. The disclosed laser welding method involves forming a laser weld joint between the steel and ductile iron substrates. The laser weld joint includes a fusion zone comprised of austenite ferrous alloy that has a composition derived from intermixing molten portions of the steel and ductile iron substrates as part of the laser welding process. The austenite ferrous alloy that constitutes the fusion zone of the laser weld joint has a carbon content of 2 wt % or more and a nickel equivalent of 60% or more and can be achieved without preheating the steel and ductile iron substrates prior to welding or using a filler wire to introduce a foreign metal into the molten substrate material created by the laser beam.

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