Journal
OPTICS AND LASER TECHNOLOGY
Volume 65, Issue -, Pages 119-125Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2014.06.016
Keywords
Laser cladding; Fe-Ti-V-Cr-C-CeO2; TiC-VC; Wear resistance; Corrosion resistance
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Funding
- National Natural Science Foundation of China [51271099]
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In situ TiC-VC reinforced Fe-based cladding layer was obtained on low carbon steel surface by laser cladding with Fe-Ti-V-Cr-C-CeO2 alloy powder. The microstructure, phases and properties of the cladding layer were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), transmission electron microscopy (TEM), potentio-dynamic polarization and electro-chemical impedance spectroscopy (EIS). Results showed Fe-Ti-V-Cr-C-CeO2 alloy powder formed a good cladding layer without defects such as cracks and pores. The phases of the cladding layer were alpha-Fe, gamma-Fe, TiC, VC and TiVC2. The microstructures of the cladding layer matrix were lath martensite and retained austenite. The carbides were polygonal blocks with a size of 0.5-2 mu m and distributed uniformly in the cladding layer. High resolution transmission electron microscopy showed the carbide was a complex matter composed of nano TiC, VC and TiVC2. The cladding layer with a hardness of 1030 HV0.2 possessed good wear and corrosion resistance, which was about 16.85 and 9.06 times than that of the substrate respectively. (C) 2014 Elsevier Ltd. All rights reserved.
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