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    Method of joining dissimilar metals through friction stir welding and multi-metal component
    41.
    发明授权
    Method of joining dissimilar metals through friction stir welding and multi-metal component 有权

    公开(公告)号：US11440134B2

    公开(公告)日：2022-09-13

    申请号：US16448482

    申请日：2019-06-21

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Huaxin Li ,  Dale A. Gerard ,  Adam G. Kotlarek

    IPC: B23K20/12 ,  C22C9/01 ,  C22C38/42 ,  B62D29/00 ,  C22C38/04 ,  B62D27/02

    Abstract: A component, which may be an automotive chassis structure, includes first and second sub-part main bodies. The first sub-part main body is formed of a first material, and the second sub-part main body is formed of a second material. The first material is a steel alloy, and the second material is aluminum or an aluminum alloy. A transition layer is attached to and contacts the first sub-part main body. The transition layer is formed of a third material, where the third material contains at least a majority of copper. A mixed layer is disposed between the transition layer and the second sub-part main body, and the mixed layer is formed of a mixture of the second material and the third material. A disclosed method includes forming the component by friction stir welding the transition layer to the second sub-part main body.

    HIGH-MODULUS, HIGH-STRENGTH NODULAR IRON AND CRANKSHAFT
    44.
    发明申请
    HIGH-MODULUS, HIGH-STRENGTH NODULAR IRON AND CRANKSHAFT 有权

    公开(公告)号：US20210115540A1

    公开(公告)日：2021-04-22

    申请号：US16657146

    申请日：2019-10-18

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jianghuai Yang ,  Qigui Wang ,  Dale A. Gerard ,  James D. Cremonesi ,  Daniel J. Wilson

    IPC: C22C37/08 ,  C22C37/10 ,  F16C3/06

    Abstract: A nodular iron alloy and automotive components, such as a crankshaft, are provided. The nodular iron alloy may include iron, about 2.2-3.2 wt % carbon, about 1.7-2.3 wt % silicon, about 0.2-0.6 wt % manganese, a maximum of 0.03 wt % phosphorus, a maximum of 0.02 wt % sulfur, about 0.2-0.6 wt % copper, about 0.1-0.4 wt % chromium, about 0.4-0.8 wt % nickel, about 0.15-0.45 wt % molybdenum, about 0.2-1.0 wt % cobalt, about 0.02-0.06 wt % magnesium, and a maximum of 0.002 wt % rare earth element(s). The nodular iron alloy may have a Young's modulus in the range of 175-195 GPa and an as-cast ultimate tensile strength in the range of 750-950 MPa. This alloy possesses favorable strength, stiffness and noise/vibration/harshness qualities, making it suitable in crankshaft applications. A method of forming the nodular iron alloy includes feeding a magnesium-based material into a molten iron alloy through a continuous system at a constant amount.

    METHODS OF REDUCING OLD OXIDES IN ALUMINUM CASTINGS
    48.
    发明申请
    METHODS OF REDUCING OLD OXIDES IN ALUMINUM CASTINGS 有权
    减少铝铸件中的老化氧化物的方法

    公开(公告)号：US20140260805A1

    公开(公告)日：2014-09-18

    申请号：US14174240

    申请日：2014-02-06

    Applicant: GM Global Technology Operations LLC

    Inventor： Qigui Wang ,  Dale A. Gerard

    IPC: C22B21/02

    CPC classification number: C22B21/02 ,  C22B21/062

    Abstract: A method of reducing entrained aluminum oxides in aluminum castings. The method comprises preheating a furnace charge to remove moisture and contaminants. The furnace charge is then coated on all free surfaces with a layer of flux. Subsequently the furnace charge is melted in a furnace to form a melt bath of liquid aluminum suitable for casting. The flux layer removes the naturally occurring oxide film from the furnace charge surface as well as provides a cover flux to protect the melt bath from oxidation.

    Abstract translation: 一种减少铝铸件中夹带的氧化铝的方法。 该方法包括预热炉装料以除去水分和污染物。 然后将炉装料用一层焊剂涂覆在所有自由表面上。 随后，炉装料在炉中熔化以形成适于铸造的液态铝的熔池。 助焊剂层从炉料表面除去天然存在的氧化膜，并提供覆盖助熔剂以保护熔融液免于氧化。

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