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    SYSTEM AND METHOD OF INCREASING COOLING RATE OF METAL SAND CASTING DURING SOLIDIFICATION
    111.
    发明公开
    SYSTEM AND METHOD OF INCREASING COOLING RATE OF METAL SAND CASTING DURING SOLIDIFICATION 审中-公开

    公开(公告)号：US20230211406A1

    公开(公告)日：2023-07-06

    申请号：US17568047

    申请日：2022-01-04

    Applicant: GM Global Technology Operations LLC

    Inventor： Steven L. Burkholder ,  Thomas W. Gustafson ,  Qigui Wang ,  Anil K. Sachdev

    IPC: B22D27/04 ,  B22D30/00

    CPC classification number: B22D27/04 ,  B22D30/00

    Abstract: A system and method of increasing a cooling rate of a metal sand casting during solidification. The system includes a 3-D printed manufactured sand mold defining a mold cavity, a coolant inlet port extending into the manufactured sand mold, a myriad of coolant passageways surrounding a portion of the mold cavity, and a coolant outlet port in fluid communication with the coolant passageways. The system further includes a coolant vapor extraction system having a collection manifold in fluid connection with the outlet port of the sand mold. A molten metal is poured into the mold cavity and a liquid coolant is introduced into the sand mold. The liquid coolant changes state into a gas phase as it permeates through the sand mold, thereby increasing the cooling rate of the casting. The liquid coolant may be that of a liquid nitrogen.

    Hybrid core for manufacturing of castings
    112.
    发明授权
    Hybrid core for manufacturing of castings 有权

    公开(公告)号：US11654476B2

    公开(公告)日：2023-05-23

    申请号：US17034530

    申请日：2020-09-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Lokesh Choudhary ,  Tiruttani Munikamal ,  Qigui Wang ,  Liang Wang

    IPC: B22C9/10 ,  B22D15/00 ,  B22D17/22

    CPC classification number: B22C9/103 ,  B22D15/00 ,  B22D17/22

    Abstract: A hybrid core for manufacturing a cast component, the hybrid core including a sand core portion having an exterior shape configured to define an interior feature of the cast component. The hybrid core also includes a metal chill element embedded within the sand core portion. The metal chill element is configured to locally absorb heat energy from the cast component during cooling of the cast component and solidification thereof. The metal chill element is constructed and arranged within the sand core portion to be removed during shake out from the cast component subsequent to the solidification thereof. A system and a method for manufacturing a cast component using such a hybrid core are also envisioned.

    HIGH-MODULUS, HIGH-STRENGTH, LOW ALLOY GRAY CAST IRON FOR CYLINDER LINERS AND AUTOMOTIVE APPLICATIONS
    113.
    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.

    Wear-resistant component and system
    116.
    发明授权
    Wear-resistant component and system 有权

    公开(公告)号：US11447850B2

    公开(公告)日：2022-09-20

    申请号：US16394394

    申请日：2019-04-25

    Applicant: GM Global Technology Operations LLC

    Inventor： Zhe Li ,  Wenying Yang ,  Qigui Wang ,  Dale A. Gerard

    IPC: C22F1/04 ,  C23C4/10 ,  B22D19/00 ,  B22D17/00 ,  C22C21/00

    Abstract: A wear-resistant component includes a substrate formed from a metal, defining a bore, and having a bore surface. The substrate includes a first region having a first microstructure adjacent the bore surface and a first average particle size. The substrate also includes a second region having a second microstructure adjacent the first microstructure and a second average particle size. The first average particle size is larger than the second average particle size. A system and a method of forming the wear-resistant coating are also described.

    Methods for composite part manufacturing
    119.
    发明授权
    Methods for composite part manufacturing 有权

    公开(公告)号：US11267191B2

    公开(公告)日：2022-03-08

    申请号：US16405471

    申请日：2019-05-07

    Applicant: GM Global Technology Operations LLC

    Inventor： Yucong Wang ,  David M. Zini ,  Qigui Wang ,  Brennon L. White

    IPC: B29C64/118 ,  B29L15/00 ,  B33Y30/00 ,  B33Y10/00 ,  B29C64/209 ,  B33Y80/00

    Abstract: An additive manufacturing method includes providing a first composite material and forming a composite part matrix using the first composite material and defining a first layer, applying a first fiber reinforcing material to the composite part matrix atop and in contact with the first layer of the composite part matrix such that fibers of the first fiber reinforcing material are oriented in a first direction and form a second layer on the composite part matrix, applying a second fiber reinforcing material to the composite part matrix atop and in contact with the first fiber reinforcing material such that fibers of the second fiber reinforcing material are oriented in a second direction orthogonal to the first direction and form a third layer on the composite part matrix, applying the first composite material to the composite part matrix, and curing the composite part matrix to create a composite product.

    TORSIONAL DAMPER AND METHOD OF WELDING PARTS HAVING DISSIMILAR MATERIALS
    120.
    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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