Journal
OPTIK
Volume 127, Issue 11, Pages 4596-4600Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2016.01.194
Keywords
Laser cladding; High hardness; Nano-ceramic coating; Ultrasonic vibration; Wear resistance
Categories
Funding
- National Natural Science Foundation of China [51179202]
- Key Laboratory of Oil Gas Equipment [OGE201403-04]
- Ministry of Education (Southwest Petroleum University)
- Natural Science Foundation of Shandong Province [ZR2014EEQ037]
- Fundamental Research Funds for the Central Universities [15CX05020A]
Ask authors/readers for more resources
Laser cladding Nickel-WC-CaF2 coatings with high hardness were prepared on medium carbon steel assisted by ultrasonic vibration processing. The microstructure, element distribution, phase composition and microhardness as well as wear resistance of the cladding coatings were investigated. It is found that ultrasonic vibration during laser cladding could reduce the degree of WC particle aggregation. The laser cladding Ni-WC-CaF2 coatings is composed of gamma-(Fe, Ni) and WC particles while the cladding coating with ultrasonic vibration consists of gamma-(Fe, Ni), Cr-23 C-6, W2C and WC. In addition, the coarse dendrite has been replaced by some fine grain structure at the bonding interface. When the ultrasonic vibration power of 800W is applied, the average microhardness of cladding coating increase to 1235HV(0.1) resulted from the combined effect of refined grain, dispersion strengthening from hard WC phase and solid solution strengthening. And the wear mass loss and friction coefficient of Ni-WC-CaF2 coating are lower than the coating without ultrasonic vibration and the coating with the ultrasonic vibration power of 900 W. Especially, the worn mechanism on the surface is uniform ploughing. (C) 2016 Elsevier GmbH. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available