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Proceedings Paper

Morphology and mechanical characteristics of pulse laser coating-texturing WC-Ni alloying layers
Author(s): Daping Wan; Hongbin Liu; Dejin Hu; Lanrong Cai
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Paper Abstract

A novel laser coating-texturing (LCT) technique was proposed to achieve appropriate surface topographies and frictional behaviour. The LCT process was realized by applying laser pulses at very high repetition rates to produce innumerable micro-craters with the required shape profile on the surface of the workpiece. Moreover, surface alloying of the dimples was carried out by melting submicron WC-Ni alloy powder on the substrates. Morphology and microstructures of the texturing layers were characterized using optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Mechanical properties of the textured samples were evaluated by abrasive resistance tests and microhardness measurement. Experimental results show that good fusion bonding between the texturing layers and the substrate has been formed, and the texturing layers is mainly composed of dense and hard fine-grained structures. The abrasive wear resistance of the laser coating textured surface was 5 times higher than that of the substrates. The average surface microhardness values were as high as 850HV.

Paper Details

Date Published: 14 January 2008
PDF: 7 pages
Proc. SPIE 6825, Lasers in Material Processing and Manufacturing III, 682506 (14 January 2008); doi: 10.1117/12.757846
Show Author Affiliations
Daping Wan, Shanghai Jiaotong Univ. (China)
Hongbin Liu, Shanghai Jiaotong Univ. (China)
Dejin Hu, Shanghai Jiaotong Univ. (China)
Lanrong Cai, Shanghai Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 6825:
Lasers in Material Processing and Manufacturing III
ShuShen Deng; Akira Matsunawa; Xiao Zhu, Editor(s)

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