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    Sand core to eliminate degenerated skin
    11.
    发明授权
    Sand core to eliminate degenerated skin 有权

    公开(公告)号：US10335851B2

    公开(公告)日：2019-07-02

    申请号：US15494774

    申请日：2017-04-24

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jianghuai Yang ,  Qigui Wang ,  Daniel J Wilson ,  James D Cremonesi

    IPC: B22C9/22 ,  B22C3/00 ,  B22C9/02 ,  B22C9/10 ,  B22D25/02 ,  B22D25/06 ,  F16C3/08

    Abstract: A sand casting apparatus, a method of forming a sand casting apparatus, and an automotive component are provided. The sand casting apparatus includes a sand casting base including a sand mold and/or a sand core having a base sand mixture, where the base sand mixture includes a sand material and a binder material. The sand casting apparatus further includes an outer layer disposed on the sand casting base. The outer layer includes silicon, magnesium, calcium, zirconium, manganese, carbon, aluminum, and iron. The automotive component has portions defining an aperture therein. The automotive component is formed of cast iron and has a nodular graphite structure from interior matrix to surface, where the nodular graphite structure on the surface is formed by a sand core having an outer layer that has reacted with the cast iron automotive component to form the nodular graphite structured surface.

    HIGH-MODULUS, HIGH-STRENGTH, LOW ALLOY GRAY CAST IRON FOR CYLINDER LINERS AND AUTOMOTIVE APPLICATIONS
    16.
    发明申请
    HIGH-MODULUS, HIGH-STRENGTH, LOW ALLOY GRAY CAST IRON FOR CYLINDER LINERS AND AUTOMOTIVE APPLICATIONS 有权

    公开(公告)号：US20230070074A1

    公开(公告)日：2023-03-09

    申请号：US17462527

    申请日：2021-08-31

    Applicant: GM Global Technology Operations LLC

    Inventor： Jianghuai Yang ,  Dale A. Gerard ,  Qigui Wang

    IPC: C22C37/10 ,  C22C37/08 ,  F02F1/00

    Abstract: A high elastic modulus, high ultimate tensile strength, and low alloy gray cast iron for cylinder liners. The gray cast iron includes from 2.60 wt % to 3.30 wt % Carbon (C); from 1.50 wt % to 2.30 wt % Silicon (Si); from 0.30 wt % to 0.80 wt % Manganese (Mn); from 0.15 wt % to 0.35 wt % Phosphorus (P); from 0.05 wt % to 0.11 wt % Sulphur (S); from 0.60 wt % to 1.20 wt % Copper (Cu); from 0.10 wt % to 0.30 wt % Chromium (Cr); from greater than 0.0 wt % to 0.1 wt % Nickle (Ni); from 0.15 wt % to 0.40 wt % Molybdenum (Mo); and balance wt % Iron (Fe). The total wt % of Si, Mn, P, S, Cu, Cr, Ni, and Mo is less than about 4.10 wt %. The gray cast iron has a Carbon Equivalent (CE) from 3.00 wt % to 3.90 wt % and the product of Mn %*S % is from 0.025 to 0.045.

    TORSIONAL DAMPER AND METHOD OF WELDING PARTS HAVING DISSIMILAR MATERIALS
    17.
    发明申请
    TORSIONAL DAMPER AND METHOD OF WELDING PARTS HAVING DISSIMILAR MATERIALS 有权

    公开(公告)号：US20210402504A1

    公开(公告)日：2021-12-30

    申请号：US16913406

    申请日：2020-06-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Daniel J. Wilson ,  Huaxin Li ,  James D. Cremonesi ,  Jianghuai Yang ,  Liang Wang ,  Qigui Wang

    IPC: B23K20/12 ,  B23K20/227 ,  B23K20/02

    Abstract: A method of joining first and second parts formed of dissimilar materials is provided. The first part defines a first part contacting surface having a frustoconical shape. The first and second parts are brought into contact with one another, with one of the first and second parts being rotated while the other remains stationary, so as to generate frictional heat between the contacting surfaces of the parts, the generated frictional heat producing softened adjacent regions in the first and second parts. A force is applied to the first and second parts to plastically deform the softened adjacent regions and to forge together the first and second parts to form a solid-state joint. A composite torsional damper hub assembly includes a steel stem and a damper hub welded to the stem at an interface. The damper hub is formed of aluminum or an aluminum alloy, and the interface is generally frustoconical.

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