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：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：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.