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Surface Polishing of Plasma Carburized Austenitic Stainless Steel

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Abstract:

After being plasma carburized, the surface of AISI 316 austenitic stainless steel was covered with a layer of compact black thin-film. The surface polishing treatment, electrochemical brightening was carried out to remove the black thin-film and renew the original color of the stainless steel. The surface appearance, microstructures, micro hardness, surface roughness and corrosion resistance of the samples treated by electrochemical brightening process were analyzed. Experimental results show that the electrochemical brightening treatment can remove the black thin-film from and restore the original color of the plasma carburized stainless steel. After electrochemical brightening treatment, the thickness and surface hardness of the carburized layer were all decreased little, but the corrosion resistance was improved significantly. And the surface roughness (Ra) was lower than before. Therefore, the electrochemical surface brightening treatment can be used to improve the surface quality of the austenitic stainless steel treated by plasma carburizing.

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Periodical:

Advanced Materials Research (Volumes 391-392)

Pages:

672-676

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.391-392.672

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Online since:

December 2011

Authors:

Shao Mei Zheng, Cheng Zhao

Keywords:

Austenitic Stainless Steel, Corrosion Resistance, Electrochemical Surface Brightening, Plasma Carburizing, Surface Polishing, Thin Film

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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