Surface modification of titanium alloy with the Ti3Al + TiB2/TiN composite coatings |
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| Authors: | J. N. Li C. Z. Chen B. B. Cui T. Squartini |
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| Affiliation: | 1. Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education), Department of Materials Science, Shandong University, , Jinan, 250061 China;2. INFM‐Department of Physics, Siena University, , Siena, 53100 Italy |
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| Abstract: | Laser cladding of the Ti3Al + TiB2 pre‐placed alloy powder on the Ti–6Al–4 V alloy in nitrogen protective atmosphere can form the Ti3Al + TiB2/TiN composite coating, which can dramatically improve the wear resistance of the Ti–6Al–4 V alloy surface. In this study, the Ti3Al + TiB2/TiN composite coatings on the Ti–6Al–4 V alloy have been researched by means of X‐ray diffraction, SEM and energy dispersive spectrometry. It was found that there is a metallurgical combination between the Ti3Al + TiB2/TiN composite coating and the substrate. The microhardness of the Ti3Al + TiB2/TiN composite coatings were 3 ~ 4 times higher than that of the Ti–6Al–4 V alloy because of the actions of the Ti3Al + TiB2/TiN hard phases and the grain refinement strengthening. Moreover, the wear mass losses of the Ti3Al + TiB2/TiN composite coatings were much lower than that of the substrate. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | laser cladding technology interface surfaces composite coating |
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