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    Method of joining dissimilar metals through friction stir welding and multi-metal component
    1.
    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.

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