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

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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 et al., "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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$35.00

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