SYNTHESIS AND CHARACTERIZATION OFZr-BASED AMORPHOUS AND CRYSTALLINE COMPOSITE COATING ONTiSUBSTRATE BY LASER CLADDING

D. M. Tang, D. C. Zhang, W. Peng, Z. C. Luo, X. Q. Wu, Y. M. Wang and J. G. Lin ()
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D. M. Tang: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;
D. C. Zhang: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;
W. Peng: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;
Z. C. Luo: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;
X. Q. Wu: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;
Y. M. Wang: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;
J. G. Lin: Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, Xiangtan 411105, P. R. China;

Surface Review and Letters (SRL), 2014, vol. 21, issue 01, 1-6

Abstract: A thin strip of aZr-based alloy with a composition ofZr60Cu25Fe5Al10(in atom percent) was used as a raw material, and the composite coatings containingZr-based amorphous phase and crystallites onTisubstrate were fabricated by a one-step laser cladding method without protection. The microstructure, phase constitution, microhardness and wear properties of the coatings were investigated. The results indicate that the microstructure of the coatings is strongly dependent on the laser scanning speed under the conditions of the laser power of 1300 W and laser beam diameter of 6 mm, and the composite coating mainly containing amorphous phase with a small amount of the crystallites can be obtained at the laser scanning speed of 10 mm/s. The composite coating exhibits much higher microhardness than the pureTisubstrate, and thus it behaves superior wear resistance in comparison with the substrate.

Keywords: Amorphous coating; laser cladding; wear (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S0218625X14500073

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