Sprayed coating and method for producing the same

By performing plastic flow treatment and honing processing on the surface of the sprayed coating, the problem of pores reappearance in the sprayed coating is solved, which reduces oil consumption and improves wear resistance and low friction.

CN116075631BActive Publication Date: 2024-12-20NISSAN MOTOR CO LTD
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Patent Information

Application Number
CN202080103221.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-09-02
Publication Date
2024-12-20
Estimated Expiration
2040-09-02

AI Technical Summary

Technical Problem

After the existing spray coating is mirrored, the internal pores will still reappear, making it difficult to further reduce the pore area ratio exposed on the surface and thereby increase oil consumption.

Method used

By performing plastic flow treatment on the surface of the sprayed coating, the Cu-Sn alloy bonded diamond abrasive particles with a hardness of 380HV to 480HV are honed to form a plastic flow section, reducing the surface roughness to less than 0.1μm, and increasing the plastic flow section The area ratio is to fill the air holes.

Benefits of technology

It effectively reduces the pore area ratio of the spray-plating film surface, reduces oil consumption, and achieves wear resistance and low friction.

✦ Generated by Eureka AI based on patent content.

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Abstract

The thermal spray coating of the present invention is an iron-based thermal spray coating formed on the inner peripheral surface of the cylinder bore of an aluminum or aluminum alloy cylinder block and has a plastic flow portion on its surface. Therefore, pores on the surface of the thermal spray coating are reduced, and oil consumption can be reduced.
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Citation Information

Patent Citations

  • Manufacturing method of thermally-sprayed cylinder block

    JP2016169725A

  • Cylinder bore and method for producing the same

    CN102213157A

  • Iron-based sprayed coating, cylinder block for internal combustion engine using same, and sliding mechanism for internal combustion engine

    CN105358730A

  • Spray coating film, engine having spray coating film and film-forming method of spray coating film

    CN105648389A

  • Cylinder liner

    JP1988195255A