公开(公告)号：US20180045134A1

公开(公告)日：2018-02-15

申请号：US15233254

申请日：2016-08-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Martin S Kramer ,  Dale A Gerard

IPC: F02F1/00 ,  F02F7/00 ,  F02F1/18 ,  C23C4/12

Abstract: An improved surface activation technique improves the adhesion of thermal spray coatings, which is useful for engine cylinder bores. The new method includes compressing the cylinder bore surface to create a surface profile on the surface, such as through rolling a roller along the surface. An engine block is also provided, which includes a plurality of cylinder bores, each cylinder bore having an inner surface, and each inner surface having a surface profile that includes a helical groove and other surface profiles formed in the inner surface. A thermal spray coating is formed on the inner surface of each cylinder bore, the thermal spray coating being adhered to the surface profile of the inner surface. A roller assembly for activating the surface is also provided.

公开(公告)号：US11097337B2

公开(公告)日：2021-08-24

申请号：US16363526

申请日：2019-03-25

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Dale A Gerard ,  Michael J Braskich

IPC: B22D19/00 ,  F02F1/00 ,  F02B77/04

Abstract: A method of manufacturing a cylinder block for an engine comprises providing a cylinder liner for the cylinder block and keeping the cylinder liner in a controlled atmosphere, removing the cylinder liner from the controlled atmosphere, removing moisture and gaseous contamination from the cylinder liner, and positioning the cylinder liner in a mold and over-casting a cylinder block in the mold.

公开(公告)号：US10662891B2

公开(公告)日：2020-05-26

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 ,  C23C4/18 ,  C23C28/02 ,  F02F1/18

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.

公开(公告)号：US11364568B2

公开(公告)日：2022-06-21

申请号：US16684055

申请日：2019-11-14

Applicant: GM Global Technology Operations LLC

Inventor： Huaxin Li ,  Liang Wang ,  Dale A Gerard

IPC: B23K26/244 ,  B23K26/00 ,  B23K35/30 ,  B22D19/04 ,  F16H57/02 ,  B22D19/00 ,  B23K101/00

Abstract: A method of joining two ferrous alloy component parts. The method includes hot metal casting a portion of a first ferrous alloy component part onto a first joining surface of a low carbon intermediate element; friction fitting a joining surface of a second ferrous alloy component part against a second joining surface of the low carbon intermediate element; and fusion welding with a concentrated energy source the intermediate element to the second ferrous alloy component part. The hot metal casting includes flowing a molten ferrous alloy onto the textured first joining surface, wherein the molten ally encompasses tabs extending from the first joining surface and filling apertures defined in the intermediate element. Then cooling the molten ferrous alloy such that a metallurgical and mechanical bond is formed between the portion of the first ferrous alloy component part and the first joining surface of the low carbon intermediate element.

公开(公告)号：US10526996B2

公开(公告)日：2020-01-07

申请号：US15233254

申请日：2016-08-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Martin S Kramer ,  Dale A Gerard

IPC: F02F1/00 ,  B24B5/06 ,  C23C4/12 ,  F02F1/18 ,  F02F7/00

Abstract: An improved surface activation technique improves the adhesion of thermal spray coatings, which is useful for engine cylinder bores. The new method includes compressing the cylinder bore surface to create a surface profile on the surface, such as through rolling a roller along the surface. An engine block is also provided, which includes a plurality of cylinder bores, each cylinder bore having an inner surface, and each inner surface having a surface profile that includes a helical groove and other surface profiles formed in the inner surface. A thermal spray coating is formed on the inner surface of each cylinder bore, the thermal spray coating being adhered to the surface profile of the inner surface. A roller assembly for activating the surface is also provided.

公开(公告)号：US10407761B2

公开(公告)日：2019-09-10

申请号：US15343286

申请日：2016-11-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Huaxin Li ,  Dale A Gerard ,  Martin S Kramer

IPC: C23C4/02 ,  C23C4/073 ,  C23C4/16 ,  F02F1/00 ,  B23K101/04 ,  B23K26/34

Abstract: An engine block and a method of coating an inner surface of an engine cylinder bore of an engine cylinder are provided. The method includes attaching a strengthening layer or ring onto an upper portion of the inner surface of the cylinder bore. The strengthening layer or ring may be attached by laser cladding. The method also includes depositing a thermal spray coating onto the inner surface of the cylinder bore and the strengthening layer or ring.