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    METHOD OF INCREASING TENSILE STRENGTH OF ALUMINUM CASTINGS
    182.
    发明申请
    METHOD OF INCREASING TENSILE STRENGTH OF ALUMINUM CASTINGS 审中-公开

    公开(公告)号：US20180320259A1

    公开(公告)日：2018-11-08

    申请号：US15584554

    申请日：2017-05-02

    Applicant: GM Global Technology Operations LLC

    Inventor： Qigui Wang ,  Jianghuai Yang ,  Maurice G. Meyer ,  William L. Miller ,  Dale A. Gerard

    IPC: C22F1/04 ,  C22F1/00 ,  C22C21/00

    CPC classification number: C22F1/04 ,  C22C21/00 ,  C22F1/002

    Abstract: A multiple step method increases net tensile strengths of high pressure die cast (HPDC) aluminum components through an alloy- and process-dependent thermal treatment. The highest temperature feasible for solution treatment of an HPDC casting is determined by computational thermodynamics, kinetics and the gas laws based on the alloy composition and gas pressure in the finally solidified parts. Determining the maximum solution temperature involves mapping pressure in the bubbles of solidified material to avoid the formation of blisters by surface adjacent bubbles in the casting. To reduce residual tensile stress, the HPDC parts are air cooled after the solution treatment. Finally, a specific, multiple temperature aging cycle is utilized to improve the aging response of air cooled HPDC parts and increase net tensile strength.

    HIGH STRENGTH HIGH CREEP-RESISTANT CAST ALUMINUM ALLOYS AND HPDC ENGINE BLOCKS
    185.
    发明申请
    HIGH STRENGTH HIGH CREEP-RESISTANT CAST ALUMINUM ALLOYS AND HPDC ENGINE BLOCKS 审中-公开

    公开(公告)号：US20180010214A1

    公开(公告)日：2018-01-11

    申请号：US15202136

    申请日：2016-07-05

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Qigui Wang ,  Melani R. Wright ,  William L. Miller ,  Jianghuai Yang

    IPC: C22C21/02 ,  F02F7/00

    CPC classification number: C22C21/02 ,  F02F7/0085 ,  F02F2007/009 ,  F02F2200/06

    Abstract: Aluminum alloys having improved properties are provided. The alloy includes about 8 to about 12 weight percent silicon, about 0.5 to about 1.5 weight percent copper, about 0.2 to about 0.4 weight percent magnesium, 0 to about 0.5 weight percent iron, about 0.3 to about 0.6 weight percent manganese, 0 to about 1.5 weight percent nickel, and 0 to about 0.5 weight percent zinc. Aluminum may be present in an amount between about 80 and 91 weight percent. The alloy may include about 0.1 to about 0.5 weight percent each of trace elements such as titanium, vanadium, and/or zirconium, and up to about 0.25 weight percent of all other trace elements. In addition, the alloy may contain about 0.03 to about 0.1 weight percent of strontium, sodium, and/or antimony, and up to 5 ppm phosphorus. Also disclosed is a high pressure die cast article, such as an engine block.

    Method to improve riser feedability for semi-permanent mold casting of cylinder heads
    186.
    发明授权
    Method to improve riser feedability for semi-permanent mold casting of cylinder heads 有权

    公开(公告)号：US09808858B2

    公开(公告)日：2017-11-07

    申请号：US14884259

    申请日：2015-10-15

    Applicant: GM Global Technology Operations LLC

    Inventor： Qigui Wang ,  Christopher D. Cogan

    IPC: B22C9/08

    CPC classification number: B22C9/088

    Abstract: A method of improving riser feedability in semi-permanent mold casting is disclosed. The method includes providing a first receptacle fluidly connected to a mold cavity and providing a second receptacle fluidly connected to a riser. Further, the method includes delivering molten metal to the first receptacle and conveying the molten metal into the mold cavity through a sprue. Delivery of molten metal to the first receptacle is terminated when the mold cavity reaches a predetermined fill level delivery of molten metal to the second receptacle is initiated. In certain embodiments, the first receptacle and the second receptacle are combined into a single receptacle and the sprue is connected to the mold cavity through a lower runner and is connected to the riser through an upper runner.

    Method for automatic quantification of dendrite arm spacing in dendritic microstructures
    188.
    发明授权
    Method for automatic quantification of dendrite arm spacing in dendritic microstructures 有权

    公开(公告)号：US09500594B2

    公开(公告)日：2016-11-22

    申请号：US14070609

    申请日：2013-11-04

    Applicant: GM Global Technology Operations LLC

    Inventor： Qigui Wang ,  James W. Knight ,  Devin R. Hess

    IPC: G06K9/00 ,  G01N21/84 ,  G06T7/40

    CPC classification number: G01N21/84 ,  G06T7/41 ,  G06T2207/10056 ,  G06T2207/30116

    Abstract: A method to automatically quantify dendrite arm spacing in dendritic microstructures. Once a location of interest in a cast material specimen has been identified, the information contained in it is automatically analyzed to quantify dendrite cell size information that is subsequently converted into a quantified dendrite arm spacing through an empirical relationship or a theoretical relationship. In one form, the relationship between DCS and DAS is such that the DAS in dendritic structure of cast aluminum alloys may be automatically determined from the measurement of one or more of dendrite cell size and the actual volume fraction of the eutectic phases in the local casting microstructure. Non-equilibrium conditions may be accounted for in situations where a theoretical volume fraction of a eutectic phase of the alloy in equilibrium condition is appropriately modified. Thus, in situations where equilibrium conditions—such as those where the casting is cooled very slowly during solidification—does not apply (such as during rapid cooling and consequent solidification), the eutectic measured in the non-equilibrium condition, which can be smaller than the theoretical value in equilibrium, can be accounted for.

    METHOD TO INCORPORATE SKIN AND CORE MATERIAL PROPERTIES IN PERFORMANCE ANALYSIS OF HIGH PRESSURE DIE CASTING ALUMINUM COMPONENTS
    189.
    发明申请
    METHOD TO INCORPORATE SKIN AND CORE MATERIAL PROPERTIES IN PERFORMANCE ANALYSIS OF HIGH PRESSURE DIE CASTING ALUMINUM COMPONENTS 审中-公开
    高压成型铝合金组件性能分析中的皮肤和核心材料性质的研究方法

    公开(公告)号：US20160138912A1

    公开(公告)日：2016-05-19

    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: G01B21/08

    CPC classification number: C22C21/02 ,  B22D11/006 ,  G01N2223/628 ,  G06F17/5018

    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.

    Abstract translation: 一种用于确定高压压铸件中的特性的方法，装置和制品。 在接收到与组件内的感兴趣位置相对应的几何信息时，使用射线 - 三角形相交关系来计算感兴趣位置的壁厚; 这种关系通过与基于八叉树的关系结合使用来简化。 执行一个或多个计算以基于所计算的壁厚来确定皮肤厚度，并且皮肤厚度计算基于对数关系，多项式关系和幂律关系中的至少一个。 可以考虑组件形状或尺寸的变化来调节剩余的表层厚度，例如当铸态组件暴露于随后的加工或相关后铸造操作时。 从此，映射属性以允许基于节点驻留在组件皮肤区域或核心区域中的逐个节点机械属性的变化。

    METHOD OF SYNTHESIZING ALUMINUM CARBON NANOTUBE MATERIALS FOR STRUCTURAL AND CONDUCTOR APPLICATIONS
    190.
    发明申请
    METHOD OF SYNTHESIZING ALUMINUM CARBON NANOTUBE MATERIALS FOR STRUCTURAL AND CONDUCTOR APPLICATIONS 有权
    合成用于结构和导体应用的碳纳米管材料的方法

    公开(公告)号：US20150381020A1

    公开(公告)日：2015-12-31

    申请号：US14319287

    申请日：2014-06-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Qigui Wang ,  Xinkuan Liu

    IPC: H02K15/00 ,  B22F3/10 ,  B22F3/24 ,  B22F1/02 ,  H02K17/16 ,  B22F5/00 ,  B22F7/02 ,  B22F7/00 ,  B22F7/06 ,  H02K15/02 ,  B22F1/00

    CPC classification number: H02K15/0012 ,  B22F1/02 ,  B22F5/00 ,  B22F2998/10 ,  C22C26/00 ,  C22C2026/002 ,  H02K3/02 ,  H02K17/165 ,  B22F3/02 ,  B22F3/10 ,  B22F3/18

    Abstract: A method of in situ formation of an aluminum carbon nanotube composite material and an induction motor component produced with such composite. The method includes forming an aluminum-based matrix by mixing a catalyst precursor with an aluminum powder such that a colloidal compound is formed that is subsequently sintered to leave a catalytically-active material formed on the surface of the aluminum powder. A carbon-containing gas is introduced to the composite catalyst that includes aluminum and the catalytic metal so that carbon nanotube reinforcements are grown on the aluminum-based matrix with the assistance of the catalytically-active metal. Additional mechanical processing steps may also include pressurizing, sintering and cold-rolling the aluminum carbon nanotube composite material.

    Abstract translation: 一种原位形成铝碳纳米管复合材料的方法和用这种复合材料制成的感应电机部件。 该方法包括通过将催化剂前体与铝粉混合形成铝基基质，使得形成胶态化合物，随后烧结以形成在铝粉表面上形成的催化活性材料。 将含碳气体引入到包含铝和催化金属的复合催化剂中，使得在催化活性金属的帮助下，在铝基基质上生长碳纳米管增强材料。 另外的机械加工步骤还可以包括加压，烧结和冷轧铝碳纳米管复合材料。

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