Effect of laser scanning speed on TiN/TiB-Ti based composite. (1st June 2013)

• Record Type: Journal Article
• Authors: Li, M; Huang, J; Zhu, Y Y; Li, Z G; Wu, Y X
• Is Part Of: Surface engineering. Volume 29:Number 5(2013)
• Page Start: 346
• Page End: 350
• Publication Date: 2013-06-01
• Subjects: Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1179/1743294413Y.0000000114
• Languages: English
• ISSNs: 0267-0844

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <p> <italic>In situ</italic> synthesised TiN and TiB particulate reinforced metal matrix composite coating was formed on Ti-3Al-2V alloy by laser cladding with a Ti/h-BN powder mixture. The phase structure, microstructure, microhardness and wear performance of the clad layer were analysed by optical microscope, X-ray diffraction, scanning electron microscopy, microhardness tester and wear testing machine. <italic>In situ</italic> TiN and TiB were synthesised in the forms of equiaxed crystal and needle platelet/whisker type microstructures in the clad layers. The scanning speed plays an important role on the microstructure of the TiN and TiB. The microhardness of laser clad layer was 850-1250 HV0·5, which was about five times of the substrate. The wear height loss of the substrate is almost two times of the clad layers.</p> </abstract>