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| Wear Behavior of Ni-base Composite Coating With Directional Solidification Structure |
| YANG Guirong1** ZHAO Hu1 SONG Wenming1,2 LI Jian3 MA Ying1 |
1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials & Key Lab. of Non-ferrous Metal Alloys and Processing, The Ministry of Education, Lanzhou University of Technology, Lanzhou 730050
2. Lanpec Technologies Limited, Lanzhou 730070
3. Wuhan Research Institute of Materials Protection, Wuhan 430030 |
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Cite this article:
YANG Guirong,ZHAO Hu, SONG Wenming,LI Jian, MA Ying. Wear Behavior of Ni-base Composite Coating With Directional Solidification Structure. Chinese Journal of Materials Research, 2013, 27(3): 279-286.
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Abstract The composite 20%WC+Ni and 5%G+20%WC+Ni coatings were prepared by vacuum cladding method on the ZG45 substrate. Microstructures, forming mechanism for the coatings and the tribological properties were investigated. The results show that the microstructure of composite coating is dense, and there are not any inclusion and pores at the interface of the coating and substrate. The main composition of coating is Ni- based solid solution and hard intermetalic compounds. The major influential factor of the isomeric microstructure is the directional solidification during metal solidification. The wear results show that the friction coefficient and fluctuation of friction coefficient of 5%G + 20%WC+ Ni coating are lower than that of 20%WC + Ni coating for the same wearing testing parameters. The wear rate of 20%WC + Ni coating increases with the increasing wear frequency, whereas the wear rate of 5%G + 20%WC + Ni coating decreases with the increasing wear frequency. The abrasive wear and oxidation wear dominate the wearing process of 20%WC + Ni coating, and the oxidation wear and micro-crack lamellar for 5%G+20%WC+Ni coating.
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Received: 25 March 2013
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| Fund: *Supported by National Natural Science Foundation of China No.51205178 and the Natural Science Foundation of Gansu Province No.1208RJZA189. |
| About author: **To whom correspondence should be addressed, Tel: (0931)2973640, E-mail: yanggrming@lut.cn |
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