Study on Microstructure and Aabrasive Resistance of Laser Cladding TiN Surface Alloyed TC9

Laser surface cladding with TiN is utilized to improve the wear resistance of TC9 titanium alloy. Microstructure and phase constitution are studied by using SEM, EDX and XRD. Microhardness measurements and wear experiments without lubrication are performed to test the properties. The experimental results show that there is a strong bonding between the laser surface cladded layer and the substrate. TiN dentrites of different size and unmelted TiN particles exist in the laser surface cladded layer. Unlubricated sliding wear test shows that wear resistance of TC9 alloy laser surface cladded with TiN is improved noticeably compared with that of the substrate.