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| Properties and microstructure of titanium-based powder coatings on aluminum
alloys by laser cladding |
| ZHANG Hong-yuan |
| School of Biological and Environmental Engineering，Tianjin Vocational Institute，Tianjin 300410，China |
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Abstract Ti powder coating was prepared on the surface of Aluminium Alloy using laser cladding technology，
the microstructure，the micro-hardness and friction and wear resistance properties of the laser cladding layer were
tested. The results show that the microstructure of coating zone is dentrite，afterbirth- like crystal at transition
zone，equiaxed grain at heat affect zone. The average hardness of the coating is 326.3HV，which is about 2 times
higher than that of the substrate（120HV）. The wear resistance properties are significantly improved，and the mass
loss is about 53 % of that the aluminum alloy，and coating surface is shallow plowing grooves.
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Received: 05 November 2019
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2020, Vol. 30 
