Abstract
In this study, Al–Ti–Co was first used to improve the surface performance of pure Ti. The synthesis of hard composite coating on pure Ti by laser cladding of Al–Ti–Co+TiB2/Si3N4 preplaced powders was investigated in detail. The SEM result indicated that a composite coating with metallurgical joint to the substrate was formed, and the coating can also have major dilution from the substrate. X-ray diffraction result indicated that this composite coating mainly consisted of Ti3Al, TiB2, TiB, TiN, Ti5Si3 and Co–Ti intermetallics. Compared with pure Ti, the improvement of the microhardness and wear resistance was observed for this composite coating.
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