Effect of laser power on the microstructure and properties of laser cladding Ti-Al-Si composite coatings

Abstract Composite coatings with in-situ-grown ceramic phases were created using Ti-35Al-15Si as the cladding material and laser cladding coaxial powder feeding method. The effect of laser power on the quality, organization, and properties of coatings was examined. The experimental results reveal that as laser power rises, penetrating cracks form in the cladding layer. Its fused cladding layer consists mainly of Ti-Al and Ti-Si phases. When the laser power increases, the dilution rate of the cladding layer also rises, resulting in an increase in the Ti-Al phase and a decrease in the Ti-Si phase. Its fused cladding layer’s hardness and wear resistance declined as laser power increased, peaking at 900 W and 829.36 HV.