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    CORROSION MITIGATION OF MAGNESIUM AND MAGNESIUM ALLOYS
    41.
    发明申请
    CORROSION MITIGATION OF MAGNESIUM AND MAGNESIUM ALLOYS 审中-公开

    公开(公告)号：US20190062926A1

    公开(公告)日：2019-02-28

    申请号：US15690329

    申请日：2017-08-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Mahmoud Abd Elhamid ,  Yang Guo ,  Ming Liu ,  Anil K. Sachdev

    IPC: C23F13/02

    Abstract: A method is provided for reducing the corrosion rate of surfaces of formed magnesium or magnesium alloy articles in which the formed surface contains small embedded particles of iron. By exposing the iron particle-containing formed surface to an acidic, aqueous solution comprising alkali metal fluoride ions at a temperature of between 20° C. and 30° C., an adherent passivating layer of MgF2 is formed. Further, such exposure to the acidified, aqueous, fluoride ion-containing solution reduces or eliminates the concentration of cathodic, corrosion-promoting, iron-containing particles on the article surface as the magnesium fluoride layer is being formed. The development of the passivating layer reduces corrosion in a water-containing environment, and even if the passivating MgF2 layer is breached, the reduction in surface iron-containing particles reduces the inherent corrosion rate of the article.

    LIGHTWEIGHT CONNECTING ROD WITH TAILORED STIFFNESS
    42.
    发明申请
    LIGHTWEIGHT CONNECTING ROD WITH TAILORED STIFFNESS 审中-公开

    公开(公告)号：US20180216658A1

    公开(公告)日：2018-08-02

    申请号：US15421917

    申请日：2017-02-01

    Applicant: GM Global Technology Operations LLC

    Inventor： Tyson W. Brown ,  Anil K. Sachdev ,  Alin C. Dragoiu

    IPC: F16C7/02 ,  F02B75/32

    CPC classification number: F16C7/023 ,  F02B75/32 ,  F16C2220/24

    Abstract: In various aspects, a lightweight connecting rod for an internal combustion engine is provided. The lightweight connecting rod has one or more of: hollow regions, lattice regions, or weight reduction apertures. The connecting rod may be made via an additive manufacturing process. The connecting rod includes a first end, a second end, and an arm. The first end is configured to be pivotally connected to a piston. The second end is configured to be pivotally connected to a crankshaft. The arm extends between the first end and the second end. The arm includes a peripheral wall. The peripheral wall has an outer surface, an inner surface, and an interior region. The interior region is defined be the inner surface. The interior region includes at least one void space. The void space is a lattice structure or a hollow region.

    RESISTANCE SPOT WELDING STEEL AND ALUMINUM WORKPIECES WITH ELECTRODE HAVING INSERT
    43.
    发明申请
    RESISTANCE SPOT WELDING STEEL AND ALUMINUM WORKPIECES WITH ELECTRODE HAVING INSERT 审中-公开

    公开(公告)号：US20170297135A1

    公开(公告)日：2017-10-19

    申请号：US15097821

    申请日：2016-04-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： David R. Sigler ,  Blair E. Carlson ,  James G. Schroth ,  David S. Yang ,  Anil K. Sachdev

    IPC: B23K11/20 ,  B23K11/30 ,  B23K11/11

    Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy workpiece, and a welding electrode used therein. In one step of the method a workpiece stack-up is provided. The workpiece stack-up includes a steel workpiece and an aluminum or aluminum alloy workpiece. Another step of the method involves contacting the aluminum or aluminum alloy workpiece with a weld face of the welding electrode. The welding electrode has a body and an insert. The insert is composed of a material having an electrical resistivity that is greater than an electrical resistivity of the material of the body. The weld face has a first section defined by a surface of the insert and has a second section defined by a surface of the body. Both the first and second sections make surface-to-surface contact with the aluminum or aluminum alloy workpiece amid resistance spot welding.

    METHOD FOR FABRICATING NON-PLANAR MAGNET
    46.
    发明申请
    METHOD FOR FABRICATING NON-PLANAR MAGNET 审中-公开

    公开(公告)号：US20170125163A1

    公开(公告)日：2017-05-04

    申请号：US15290660

    申请日：2016-10-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Frederick E. Pinkerton ,  Anil K. Sachdev

    IPC: H01F41/02 ,  B21D22/02

    CPC classification number: H01F41/0266 ,  B21C23/002 ,  B21C23/06 ,  B21C23/12 ,  B21C23/183 ,  B21C35/023 ,  B21D22/022 ,  B21D22/025 ,  B21D35/005

    Abstract: A method for fabricating a non-planar magnet includes extruding a precursor material including neodymium iron boron crystalline grains into an original anisotropic neodymium iron boron permanent magnet having an original shape, wherein the original anisotropic neodymium iron boron permanent magnet has at least about 90 percent neodymium iron boron magnetic material by volume. The original anisotropic neodymium iron boron permanent magnet is heated to a deformation temperature. The original anisotropic neodymium iron boron permanent magnet is deformed into a reshaped anisotropic neodymium iron boron permanent magnet having a second shape substantially different from the original shape using heated tooling to apply a deformation load to the original anisotropic neodymium iron boron permanent magnet. The original anisotropic neodymium iron boron permanent magnet and the reshaped anisotropic neodymium iron boron permanent magnet each have respective magnetic moments substantially aligned with a respective local surface normal corresponding to the respective magnetic moment.

    CHILLED-ZONE MICROSTRUCTURES FOR CAST PARTS MADE WITH LIGHTWEIGHT METAL ALLOYS
    47.
    发明申请
    CHILLED-ZONE MICROSTRUCTURES FOR CAST PARTS MADE WITH LIGHTWEIGHT METAL ALLOYS 审中-公开
    用轻金属合金铸造的铸件的冷冻区微结构

    公开(公告)号：US20160114387A1

    公开(公告)日：2016-04-28

    申请号：US14881551

    申请日：2015-10-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Bin Hu ,  Anil K. Sachdev ,  Jon T. Carter ,  Jianfeng Wang

    IPC: B22D21/04 ,  C22C21/10 ,  C22C23/02 ,  C22C21/02 ,  B22D27/04 ,  B22D17/00

    CPC classification number: B22D21/04 ,  B22D17/00 ,  B22D21/007 ,  B22D27/045 ,  B22D30/00 ,  C22C21/02 ,  C22C21/06 ,  C22C21/08 ,  C22C21/10 ,  C22C23/02

    Abstract: Methods for casting high strength, high ductility lightweight metal components are provided. The casting may be die-casting. A molten lightweight metal alloy is introduced into a cavity of a mold. The molten lightweight metal alloy is solidified and then a solid component is removed from the mold. The solid component is designed to have a thin wall. For example, the solid component has at least one dimension of less than or equal to about 2 mm. In this way, a chill zone microstructure is formed that extends across the at least one dimension of the solid lightweight metal alloy component. The solid component thus may be substantially free of dendritic microstructure formation, enabling more extensive alloy chemistries than previously possible during casting. Such methods may be used to form high strength, high ductility, and lightweight metal alloy vehicle components.

    Abstract translation: 提供了高强度，高延展性的轻质金属部件的铸造方法。 铸件可能是压铸的。 将熔融的轻质金属合金引入模具的空腔中。 将熔融的轻质金属合金固化，然后从模具中取出固体成分。 固体组分设计为具有薄壁。 例如，固体组分具有小于或等于约2mm的至少一个尺寸。 以这种方式，形成了延伸穿过固体轻质金属合金部件的至少一个尺寸的冷却区微结构。 因此，固体组分可以基本上没有树枝状微结构形成，使得能够比铸造期间更可能的更广泛的合金化学。 这种方法可用于形成高强度，高延展性和轻质金属合金车辆部件。

    Lubrication system for warm forming
    48.
    发明授权
    Lubrication system for warm forming 有权
    润滑系统用于热成型

    公开(公告)号：US09302312B2

    公开(公告)日：2016-04-05

    申请号：US14174888

    申请日：2014-02-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Anil K. Sachdev ,  William R. Rodgers

    IPC: B21D37/18 ,  B21D22/02 ,  B21D35/00

    CPC classification number: B21D37/18 ,  B21D22/022 ,  B21D35/005

    Abstract: Sheet metal workpieces are preheated to a temperature in the range of about 100° C. to about 500° C. for warm forming between press-actuated forming dies. The forming dies are not heated, but are coated with a liquid lubricating material suitable for the forming of the preheated sheet metal workpiece. For example, the liquid lubricating material is suitably a halogenated hydrocarbon that will adhere to unheated die surfaces and serve in the forming of the sheet metal workpiece into a vehicle body panel or other product. But the liquid lubricating material is composed so as to evaporate from surfaces of the formed workpiece at a temperature below about 200° C., so that the workpiece does not have to be cleaned before it is decoratively finished. The lubricant material may be vaporized, for example, into a warm stream of air or nitrogen and carried to a recovery or disposal system.

    Abstract translation: 将钣金工件预热至约100℃至约500℃的温度，以在压制成型模具之间进行热成形。 成型模不加热，而是用适于形成预热的金属片工件的液体润滑材料涂覆。 例如，液体润滑材料适当地是将附着到未加热的模具表面上的卤化烃，并且用于将金属板件加工成车身板或其他产品。 但是液体润滑材料构成为在低于约200℃的温度下从形成的工件的表面蒸发，使得工件在装饰完成之前不必被清洁。 润滑剂材料可以例如蒸发成温暖的空气或氮气流并运送到回收或处理系统。

    Breakaway headlamp mounting system
    49.
    发明授权
    Breakaway headlamp mounting system 有权
    分离式前大灯安装系统

    公开(公告)号：US09221387B1

    公开(公告)日：2015-12-29

    申请号：US14339008

    申请日：2014-07-23

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Scott W. Thorpe ,  Anil K. Sachdev

    IPC: B60Q1/04 ,  B60R21/34 ,  B62D25/12

    CPC classification number: B60Q1/0491 ,  B60R21/34

    Abstract: A breakaway headlamp mounting system is provided for a vehicle subjectable to an external force and having a body structure, a headlamp, and a hood. The breakaway headlamp mounting system has a mounting tab attached to the headlamp and attachable to the body structure and a mounting tab breakaway feature included in one of the hood, the body structure, and the mounting tab. The mounting tab breakaway feature is configured to break the mounting tab in response to the external force when the mounting tab is attached to the body structure.

    Abstract translation: 提供一种分离式前照灯安装系统，用于能够受到外力的车辆，并具有车体结构，前照灯和罩。 分离式前照灯安装系统具有附接到前照灯并可附接到主体结构的安装突片和包括在罩，主体结构和安装突片之一中的安装突起分离特征。 安装翼片分离特征被构造成当安装翼片附接到车身结构时响应于外力而破坏安装翼片。

    LUBRICATION SYSTEM FOR WARM FORMING
    50.
    发明申请
    LUBRICATION SYSTEM FOR WARM FORMING 有权
    润滑成型润滑系统

    公开(公告)号：US20150224558A1

    公开(公告)日：2015-08-13

    申请号：US14174888

    申请日：2014-02-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Anil K. Sachdev ,  William R. Rodgers

    IPC: B21D37/18

    CPC classification number: B21D37/18 ,  B21D22/022 ,  B21D35/005

    Abstract: Sheet metal workpieces are preheated to a temperature in the range of about 100° C. to about 500° C. for warm forming between press-actuated forming dies. The forming dies are not heated, but are coated with a liquid lubricating material suitable for the forming of the preheated sheet metal workpiece. For example, the liquid lubricating material is suitably a halogenated hydrocarbon that will adhere to unheated die surfaces and serve in the forming of the sheet metal workpiece into a vehicle body panel or other product. But the liquid lubricating material is composed so as to evaporate from surfaces of the formed workpiece at a temperature below about 200° C., so that the workpiece does not have to be cleaned before it is decoratively finished. The lubricant material may be vaporized, for example, into a warm stream of air or nitrogen and carried to a recovery or disposal system.

    Abstract translation: 将钣金工件预热至约100℃至约500℃的温度，以在压制成型模具之间进行热成形。 成型模不加热，而是用适于形成预热的金属片工件的液体润滑材料涂覆。 例如，液体润滑材料适当地是将附着到未加热的模具表面上的卤化烃，并且用于将金属板件加工成车身板或其他产品。 但是液体润滑材料构成为在低于约200℃的温度下从形成的工件的表面蒸发，使得工件在装饰完成之前不必被清洁。 润滑剂材料可以例如蒸发成温暖的空气或氮气流并运送到回收或处理系统。

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