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PHASE CONSTITUENTS AND MICROSTRUCTURE OF Ti₃Al/Fe₃Al + TiN/TiB₂ COMPOSITE COATING ON TITANIUM ALLOY

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

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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

Corresponding author.

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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

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https://doi.org/10.1142/S0218625X11014527Cited by:12 (Source: Crossref)

Abstract

Laser cladding of the Fe₃Al + B₄C/TiN + Al₂O₃ pre-placed powders on the Ti-6Al-4V alloy can form the Ti₃Al/Fe₃Al + TiN/TiB₂ composite coating, which improved the wear resistance of the Ti-6Al-4V alloy surface. In this study, the Ti₃Al/Fe₃Al + TiN/TiB₂ composite coating has been researched by means of X-ray diffraction and scanning electron microscope. It was found that during the laser cladding process, Al₂O₃ can react with TiB₂, leading to the formations of Ti₃Al and B. This principle can be used to improve the Fe₃Al + B₄C/TiN laser-cladded coating on the Ti-6Al-4V alloy. Furthermore, during the cladding process, C consumed the oxygen in Fe₃Al + B₄C /TiN + Al₂O₃ molten pool, which retarded the productions of the redundant metal oxides.

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Vol. 18, No. 03n04

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Received 6 March 2011

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