Paper Title:
Wear Behaviors of Laser Cladded Nickel-Based Alloy Coatings Reinforced by Molybdenum and Cerium Dioxide under Sliding Friction
  Abstract

Three kinds of coatings had been prepared on the surface of 45CrNi steel plates using laser cladded technique by adding Mo and CeO2 into the Nickel-based alloys. The wear behaviors of these three kinds of coatings in sliding against Al2O3 grinding ring were investigated by using a MM-200 Wear Tester. The results indicated that the addition of both Mo and CeO2 could improve the wear resistance of Nickel-based alloy coatings. If the original Nickel-based alloy coating was taken as the standard sample, the relative wear resistances of Mo-modified and Ce-modified coatings are 1.31 and 7.54 respectively, and the coefficients of friction appreciably decreased. SEM images of the worn surface of the coatings showed that the wear of original Nickel-based alloy coating was dominated by the mechanism of micro-cutting, and the Mo-modified coating and Ce-modified coating had a feature of fatigue wear in addition to micro-cutting. In sliding, the wearing resistance of Ce-modified coating was higher than the other two. The wear test results were closely related to the microstructures of the coatings.

  Info
Periodical
Key Engineering Materials (Volumes 373-374)
Main Theme
Edited by
M.K. Lei, X.P. Zhu, K.W. Xu and B.S. Xu
Pages
527-530
DOI
10.4028/www.scientific.net/KEM.373-374.527
Citation
J. P. Yuan, P. Zhang, Z. J. Liang, L. Sun, "Wear Behaviors of Laser Cladded Nickel-Based Alloy Coatings Reinforced by Molybdenum and Cerium Dioxide under Sliding Friction", Key Engineering Materials, Vols. 373-374, pp. 527-530, 2008
Online since
March 2008
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Abstract:Laser cladding process is used to obtain protective coatings using as heat source a laser. This melts the substrate and the feedstock...
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