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    STRESS RELIEF OF MECHANICALLY ROUGHENED CYLINDER BORES FOR REDUCED CRACKING TENDENCY
    12.
    发明申请
    STRESS RELIEF OF MECHANICALLY ROUGHENED CYLINDER BORES FOR REDUCED CRACKING TENDENCY 有权
    用于减少破裂倾向的机械加固缸体的应力消除

    公开(公告)号：US20160258047A1

    公开(公告)日：2016-09-08

    申请号：US15042208

    申请日：2016-02-12

    Applicant: GM Global Technology Operations LLC

    Inventor： Yucong Wang ,  Martin S. Kramer

    IPC: C23C4/02 ,  C23F17/00 ,  C22F1/00 ,  C22F3/00 ,  F02F1/00 ,  C22F1/04

    CPC classification number: C23C4/02 ,  C22F1/002 ,  C22F1/04 ,  C22F3/00 ,  F02F1/00 ,  F02F2001/008 ,  F02F2200/06

    Abstract: A method of treating the surface of an aluminum-based engine block cylinder bore that has been mechanically roughened. In one form, this method includes using vibratory stress relief, elevated temperature stress relief or cryogenic stress relief so that residual stresses imparted to the surface by the roughening process are reduced. In this way, a protective coating that is also applied to the bore surface will exhibit better adhesion and lower incidence of stress-induced or fatigue-induced cracking.

    Abstract translation: 一种处理机械粗糙化的铝基发动机缸体缸面的表面的方法。 在一种形式中，该方法包括使用振动应力消除，升高的温度应力消除或低温应力消除，从而减小通过粗糙化过程赋予表面的残余应力。 以这种方式，也施加到孔表面的保护涂层将表现出更好的附着力和更低的应力诱发或疲劳引起的裂纹的发生。

    ALUMINUM CYLINDER BLOCK ASSEMBLIES AND METHODS OF MAKING THE SAME
    13.
    发明申请
    ALUMINUM CYLINDER BLOCK ASSEMBLIES AND METHODS OF MAKING THE SAME 审中-公开

    公开(公告)号：US20190085786A1

    公开(公告)日：2019-03-21

    申请号：US15708272

    申请日：2017-09-19

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Ronald J. Petrus ,  Martin S. Kramer

    IPC: F02F1/00 ,  F02F7/00 ,  B22D19/00 ,  C22C21/02 ,  C23C4/06

    Abstract: Engine block assemblies and methods for making the same are provided. Methods include casting an engine block around one or more extruded aluminum cylindrical cylinder liners, wherein each cylinder liner includes a cylindrical inner surface and an outer surface, and the outer surface of each of the cylinder liners is contiguous with the engine block and defines a cylinder bore, subsequently surface-preparing the inner surface of each of the cylinder liners, subsequently applying a ferrous liner to an inner side of each of the cylinder liners via thermal spraying, and subsequently machining an inner surface of the ferrous liner. Each of the aluminum cylinder liners are extruded, and can comprise a low silicon content aluminum alloy. The engine block can comprise a high silicon content aluminum alloy. Each of the one or more ferrous liners comprises a thickness of less than about 175 microns.

    Surface texture providing improved thermal spray adhesion
    14.
    发明授权
    Surface texture providing improved thermal spray adhesion 有权

    公开(公告)号：US10106878B2

    公开(公告)日：2018-10-23

    申请号：US15184699

    申请日：2016-06-16

    Applicant: GM Global Technology Operations LLC

    Inventor： Zhe Li ,  Martin S. Kramer ,  Yucong Wang ,  Jianghuai Yang

    IPC: C23C4/02 ,  F02F1/00

    Abstract: An improved substrate surface texture i.e., roughness, significantly improves the adhesion of thermal spray coatings. The surface texture is defined by two metrology parameters and the invention comprehends a range of average roughness (Sa) between 9 and 15 μm and developed interfacial area ratio (Sdr) of greater than 100%. This surface texture is achieved by methods such as water jet erosion, mechanical roughening, laser texturing, chemical etching and plasma etching. The surface texture is especially beneficial for walls of cylinders of internal combustion engines, hydraulic cylinders and similar components to which a thermal spray coating is adhered and which are exposed to sliding or frictional wear.

    LASER REMELTING TO ENHANCE CYLINDER BORE MECHANICAL PROPERTIES
    15.
    发明申请
    LASER REMELTING TO ENHANCE CYLINDER BORE MECHANICAL PROPERTIES 审中-公开

    公开(公告)号：US20180283310A1

    公开(公告)日：2018-10-04

    申请号：US15478741

    申请日：2017-04-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Huaxin Li ,  Daniel J. Wilson ,  Martin S. Kramer ,  Dale A. Gerard

    IPC: F02F1/00 ,  C23C4/12 ,  C23C4/18 ,  C23C4/06 ,  C23C28/02 ,  F02F7/00

    Abstract: An engine block, an automotive structure, and a method of coating an inner surface of an engine cylinder bore of an engine cylinder are provided. The method includes providing an inner bore substrate defining an inner surface of the engine cylinder bore, the inner bore substrate being formed of a first material. The method further includes disposing a thermal spray coating onto the inner surface of the engine cylinder bore. The thermal spray coating is formed of a second material that is different than the first material. The method also includes melting at least a portion of the thermal spray coating with a laser after performing the step of disposing the thermal spray coating onto the inner surface of the engine cylinder bore. The automotive structure and the engine block have a substrate covered by a thermal spray coating and laser remelted sections anchoring the coating to the substrate.

    SURFACE TEXTURE PROVIDING IMPROVED THERMAL SPRAY ADHESION
    16.
    发明申请
    SURFACE TEXTURE PROVIDING IMPROVED THERMAL SPRAY ADHESION 审中-公开

    公开(公告)号：US20170362691A1

    公开(公告)日：2017-12-21

    申请号：US15184699

    申请日：2016-06-16

    Applicant: GM Global Technology Operations LLC

    Inventor： Zhe Li ,  Martin S. Kramer ,  Yucong Wang ,  Jianghuai Yang

    IPC: C23C4/02 ,  F02F1/00

    CPC classification number: C23C4/02 ,  F02F1/004

    Abstract: An improved substrate surface texture i.e., roughness, significantly improves the adhesion of thermal spray coatings. The surface texture is defined by two metrology parameters and the invention comprehends a range of average roughness (Sa) between 9 and 15 μm and developed interfacial area ratio (Sdr) of greater than 100%. This surface texture is achieved by methods such as water jet erosion, mechanical roughening, laser texturing, chemical etching and plasma etching. The surface texture is especially beneficial for walls of cylinders of internal combustion engines, hydraulic cylinders and similar components to which a thermal spray coating is adhered and which are exposed to sliding or frictional wear.

    TiO2 APPLICATION AS BONDCOAT FOR CYLINDER BORE THERMAL SPRAY
    18.
    发明申请
    TiO2 APPLICATION AS BONDCOAT FOR CYLINDER BORE THERMAL SPRAY 审中-公开
    二氧化钛应用作为圆柱体热膨胀的粘合剂

    公开(公告)号：US20160356242A1

    公开(公告)日：2016-12-08

    申请号：US14733121

    申请日：2015-06-08

    Applicant: GM Global Technology Operations LLC

    Inventor： Ronald J. Petrus ,  Martin S. Kramer

    IPC: F02F7/00 ,  C23C4/08 ,  C25D7/04 ,  C23C4/02 ,  C25D5/44 ,  C25D5/34 ,  C23C28/00 ,  C25D9/04

    CPC classification number: C25D7/04 ,  C23C4/02 ,  C23C4/08 ,  C23C4/18 ,  C23C28/321 ,  C23C28/345 ,  C23C28/3455 ,  C25D9/00 ,  C25D9/12 ,  F02F1/18

    Abstract: An engine cylinder bore with a plated bondcoat and a method of coating the surface of an engine cylinder bore. This method includes electroplating a bondcoat to the surface such that a substantial entirety of its inner circumference that corresponds to a piston travel path within the cylinder bore is covered. Cleaning or related pretreatment operations to properly activate the plated surface helps to ensure a durable coupling of a subsequently-applied thermal spray coating. In one preferred form, the cylinder bore is made from an aluminum-based alloy or a magnesium-based alloy that may be roughened prior to applying the bondcoat, while the bondcoat is plated using a titanium-based material such that a relatively thin TiO2 layer is formed on the cylinder bore. In another preferred form, the thermal spray coating is made of an iron-based material.

    Abstract translation: 具有电镀粘合剂涂层的发动机气缸孔和涂覆发动机气缸孔表面的方法。 这种方法包括将表面电镀一层粘合剂涂层，使其对应于气缸孔内的活塞行进路径的大部分内圆周被覆盖。 清洁或相关的预处理操作以正确激活电镀表面有助于确保随后施加的热喷涂的耐用耦合。 在一个优选形式中，气缸孔由铝基合金或镁基合金制成，在施加粘合涂层之前可以使其粗糙化，同时使用钛基材料对粘结涂层进行电镀，使得相对较薄的TiO 2层 形成在气缸孔上。 在另一优选形式中，热喷涂由铁基材料制成。

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