Title: Influence of copper on microstructures and wear resistance of laser composite coating

Authors: Jianing Li; Shuili Gong; Huaixue Li; Yudai Wang; Shuai Jiang; Zheyuan Chen

Addresses: Science and Technology on Power Beam Processes Laboratory; Beijing Aeronautical Manufacturing Technology Research Institute, Dongjunzhuang Road #1, Beijing, 100024, China ' Science and Technology on Power Beam Processes Laboratory; Beijing Aeronautical Manufacturing Technology Research Institute, Dongjunzhuang Road #1, Beijing, 100024, China ' Science and Technology on Power Beam Processes Laboratory; Beijing Aeronautical Manufacturing Technology Research Institute, Dongjunzhuang Road #1, Beijing, 100024, China ' Science and Technology on Power Beam Processes Laboratory; Beijing Aeronautical Manufacturing Technology Research Institute, Dongjunzhuang Road #1, Beijing, 100024, China ' Science and Technology on Power Beam Processes Laboratory; Beijing Aeronautical Manufacturing Technology Research Institute, Dongjunzhuang Road #1, Beijing, 100024, China ' Science and Technology on Power Beam Processes Laboratory; Beijing Aeronautical Manufacturing Technology Research Institute, Dongjunzhuang Road #1, Beijing, 100024, China

Abstract: Laser cladding of the Fe3Al+(Co-coated WC)/C+SiC/nano-CeO2 pre-placed powders on a Ti-6Al-4V alloy can form a composite coating, which improved the wear resistance of substrate. However, the pores and micro-crack were produced in such coating. In this study, Cu was used to improve the quality of such coating. The Cu reinforced laser clad composite coating has been researched by means of X-ray diffraction, scanning electron microscope and energy dispersive spectrometer. It was noted that with Cu addition, such composite coating exhibited a compact microstructure free of pores and microcrack. And the Cu reinforced composite coating also exhibited an effective wear resistance due to the actions of the phase constitution and fine-grain strengthening.

Keywords: lasers; copper; microstructure; wear resistance; laser composite coatings; surface modification; laser cladding; pores; microcracks.

DOI: 10.1504/IJMPT.2013.056295

International Journal of Materials and Product Technology, 2013 Vol.46 No.2/3, pp.155 - 165

Received: 11 Sep 2012
Accepted: 28 Feb 2013

Published online: 21 Jun 2014 *

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