Study for the Reason of Chromium Coating Seepage on Piston Rods and the Anti-Seepage by Using Ultrasonic Elliptical Vibration Burnishing Process

Wei Qin; De Yuan Zhang

doi:10.4028/www.scientific.net/AMR.530.85

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 530Study for the Reason of Chromium Coating Seepage...

Study for the Reason of Chromium Coating Seepage on Piston Rods and the Anti-Seepage by Using Ultrasonic Elliptical Vibration Burnishing Process

Abstract:

In this paper the reason of chromium coating seepage on piston rods is analyzed. The results show that the chromium coating seepage is mainly caused by the net structure of micro-cracks produced in electroplating process. According to this special structure of chromium coating, experiments are made to study the feasibility that the chromium coating is burnished by using the ultrasonic elliptical vibration burnishing (UEVB) process to prevent seepage. The results of study demonstrate that the UEVB process make the micro-cracks on the surface of chromium coating closed or eliminated because the UEVB process could make the chromium coating plastic-forming. Thereby airtightness of piston rods is increased and seepage is prevented approximately. Compressive stress within the material of chromium coating will produce so that the micro-cracks propagation would be restrained and the life of parts is extended.

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Periodical:

Advanced Materials Research (Volume 530)

Pages:

85-90

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.530.85

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Online since:

June 2012

Authors:

Wei Qin, De Yuan Zhang

Keywords:

Chromium Coating, Seepage, Ultrasonic Elliptical Vibration Burnishing (UEVB)

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