Microstructure and Tribological Properties of Stellite21 Coating by Electro-Spark Deposition

Qi Feng Jing; Ye Fa Tan; Hui Yong Ji; Xiao Long Wang; Li Gao; Wei Zhao

doi:10.4028/www.scientific.net/AMM.423-426.939

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 423-426Microstructure and Tribological Properties of...

Microstructure and Tribological Properties of Stellite21 Coating by Electro-Spark Deposition

Abstract:

Setellite21 cobalt-based alloy coating was deposited on 45 steel by electro-spark deposition. Microstructure and phase composition of the coating were analyzed. Wear resistance and wear mechanism of the coating were researched. The results indicate that the coating with compact structure is mainly composed of Co, Co₆W₆C, CoC_x and CoCr. Average microhardness of the coating is 445.34 HV_0.5, which is about 2 times to that of the substrate. The coating presents excellent wear resistance with no obvious peelings and scratches. Wear resistance of the coating is about 2.3~2.7 times to that of the substrate. Wear mechanism of the coating mainly contains abrasive wear and fatigue wear, and along with oxidization wear.

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Periodical:

Applied Mechanics and Materials (Volumes 423-426)

Pages:

939-943

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.423-426.939

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Online since:

September 2013

Authors:

Qi Feng Jing, Ye Fa Tan, Hui Yong Ji, Xiao Long Wang, Li Gao, Wei Zhao

Keywords:

Coating, Cobalt-Based Alloy, Electro-Spark Deposition, Wear Mechanism, Wear Resistance

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