PHASE CONSTITUENTS AND MICROSTRUCTURE OFTi3Al/Fe3Al + TiN/TiB2COMPOSITE COATING ON TITANIUM ALLOY

Jianing Li (), Chuanzhong Chen () and Cuifang Zhang
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Jianing Li: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China
Chuanzhong Chen: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China
Cuifang Zhang: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China

Surface Review and Letters (SRL), 2011, vol. 18, issue 03n04, 103-108

Abstract: Laser cladding of theFe3Al + B4C/TiN + Al2O3pre-placed powders on theTi-6Al-4Valloy can form theTi3Al/Fe3Al + TiN/TiB2composite coating, which improved the wear resistance of theTi-6Al-4Valloy surface. In this study, theTi3Al/Fe3Al + TiN/TiB2composite coating has been researched by means of X-ray diffraction and scanning electron microscope. It was found that during the laser cladding process,Al2O3can react withTiB2, leading to the formations ofTi3AlandB. This principle can be used to improve theFe3Al + B4C/TiNlaser-cladded coating on theTi-6Al-4Valloy. Furthermore, during the cladding process,Cconsumed the oxygen inFe3Al + B4C /TiN + Al2O3molten pool, which retarded the productions of the redundant metal oxides.

Keywords: Laser cladding; titanium aluminides; surface modification; titanium alloys (search for similar items in EconPapers)
Date: 2011
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DOI: 10.1142/S0218625X11014527

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