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    HIGH-MODULUS, HIGH-STRENGTH NODULAR IRON AND CRANKSHAFT
    81.
    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.

    COMPOSITE METAL FLEXPLATE
    83.
    发明申请
    COMPOSITE METAL FLEXPLATE 审中-公开

    公开(公告)号：US20200016688A1

    公开(公告)日：2020-01-16

    申请号：US16032880

    申请日：2018-07-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

    IPC: B23K20/12 ,  F16D3/79 ,  F16F15/30 ,  F16H55/06 ,  F16H55/17

    Abstract: A composite metal flexplate is disclosed that includes an aluminum center plate and a steel ring gear joined to the aluminum center plate by a solid-state joint. The solid-state joint that joins together the aluminum center plate and the steel ring gear may be formed by friction welding. During the friction welding process, a surface of an annular body of the steel ring gear is preheated, followed by bringing the preheated surface of the annular body into contact with a surface of a periphery of a circular body of the aluminum center plate. The two contacting surfaces are then caused to experience relative rotational contacting movement, which generates frictional heat therebetween and softens adjacent regions of the steel ring gear and the aluminum center plate. Once this occurs, an applied force is administered to compress and forge the contacting surfaces together, thereby establishing the solid-state joint.

    Method to incorporated skin and core material properties in performance analysis of high pressure die casting aluminum components
    84.
    发明授权
    Method to incorporated skin and core material properties in performance analysis of high pressure die casting aluminum components 有权

    公开(公告)号：US10344358B2

    公开(公告)日：2019-07-09

    申请号：US14547308

    申请日：2014-11-19

    Applicant: GM Global Technology Operations LLC

    Inventor： Qigui Wang ,  Bing Li ,  Cherng-Chi Chang ,  Wenying Yang ,  Michael J. McCreedy

    IPC: C22C21/02 ,  G06F17/50 ,  B22D11/00

    Abstract: A method, device and article of manufacture for determining properties in a high pressure die cast component. Upon receipt of geometric information that corresponds to a location of interest within the component, a ray-triangle intersection relationship is used to calculate a wall thickness of the location of interest; this relationship is simplified by being used in conjunction with an octree-based relationship. One or more calculations are performed to determine a skin thickness based on the calculated wall thickness, and the skin thickness calculations are based on at least one of a logarithmic relationship, a polynomial relationship and a power law relationship. Changes in component shape or size may be taken into consideration to adjust the remaining skin layer thickness, such as that when the as-cast component is exposed to subsequent machining or related post-casting operations. From this, the properties are mapped to allow node-by-node variations in mechanical properties based on whether the node resides in the component skin region or core region.

    Sand core to eliminate degenerated skin
    85.
    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.

    ULTRASONIC WELDING/BRAZING A STEEL WORKPIECE OVER ALUMINUM ALLOYS
    86.
    发明申请
    ULTRASONIC WELDING/BRAZING A STEEL WORKPIECE OVER ALUMINUM ALLOYS 审中-公开

    公开(公告)号：US20190151983A1

    公开(公告)日：2019-05-23

    申请号：US15817605

    申请日：2017-11-20

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Huaxin Li ,  Qigui Wang ,  Daniel J. Wilson

    IPC: B23K20/24 ,  B23K20/10 ,  B23K35/28 ,  B23K26/362

    Abstract: A method for simultaneous ultrasonic welding/brazing of a first metallic alloy workpiece over a second metallic alloy workpiece includes creating depressions in a joining surface of a first metallic alloy workpiece, and applying a coating material to at least one of the joining surface of the first metallic alloy workpiece or a joining surface of a second metallic alloy workpiece. Next, contaminates are removed from the joining surfaces of the first metallic alloy workpiece and the second metallic alloy workpiece, and the workpieces are joined using ultrasonic vibration to create a welded and brazed joint.

    METHODS TO INCREASE SOLID SOLUTION ZIRCONIUM IN ALUMINUM ALLOYS
    88.
    发明申请
    METHODS TO INCREASE SOLID SOLUTION ZIRCONIUM IN ALUMINUM ALLOYS 审中-公开

    公开(公告)号：US20180291479A1

    公开(公告)日：2018-10-11

    申请号：US15481666

    申请日：2017-04-07

    Applicant: GM Global Technology Operations LLC

    Inventor： Michael J. Walker ,  Qigui Wang

    IPC: C22C1/02 ,  C22C21/00

    CPC classification number: C22C1/026 ,  C22C1/03 ,  C22C9/00 ,  C22C16/00 ,  C22C21/00 ,  C22C45/00 ,  C22C45/001 ,  C22C45/08 ,  C22F1/04

    Abstract: A method of making an aluminum alloy containing zirconium includes heating a first composition comprising aluminum to a first temperature of greater than or equal to about 580° C. to less than or equal to about 800° C. The method further includes adding a second composition including a copper-zirconium compound to the first composition to form a third composition. The copper-zirconium compound of the second composition has a molar composition of greater than or equal to about 41% zirconium to less than or equal to about 67% zirconium and a balance of copper. The method also includes solidifying the third composition at a cooling rate of greater than or equal to about 0.1° C./second to less than or equal to about 100° C./second to a second temperature less than or equal to a solidus temperature and decomposing the copper-zirconium compound at a third temperature of less than or equal to about 715° C.

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