Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5007635 | Optics & Laser Technology | 2017 | 11 Pages |
Abstract
TiC reinforced Ti matrix composite coating with Ti2SC/TiS lubricant phases in-situ synthesized were prepared on TA2 titanium alloy by laser cladding with different powder mixtures: 40%Ti-19.5%TiC-40.5%WS2, 40%Ti-25.2%TiC-34.8%WS2, 40%Ti-29.4%TiC-30.6%WS2 (wt%). The phase compositions, microstructure, microhardness and tribological behaviors and wear mechanisms of coatings were investigated systematically. Results indicate that the main phase compositions of three coatings are all continuous matrix α-Ti, reinforced phases of (Ti,W)C1âx and TiC, lubricant phases of Ti2SC and TiS. The microhardness of the three different coatings are 927.1 HV0.5, 1007.5 HV0.5 and 1052.3 HV0.5, respectively. Compared with the TA2 titanium alloy (approximately 180 HV0.5), the microhardness of coatings have been improved dramatically. The coefficients of friction and the wear rates of those coatings are 0.41 and 30.98Ã10â5 mm3 Nâ1 mâ1, 0.30 and 18.92Ã10â5 mm3 Nâ1 mâ1, 0.34 and 15.98Ã10â5 mm3 Nâ1 mâ1, respectively. Comparatively speaking, the coating fabricated with the powder mixtures of 40%Ti-25.2%TiC-34.8%WS2 presents superior friction reduction and anti-wear properties and the main wear mechanisms of that are slight plastic deformation and adhesive wear.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Electrical and Electronic Engineering
Authors
Yong-Jie Zhai, Xiu-Bo Liu, Shi-Jie Qiao, Ming-Di Wang, Xiao-Long Lu, Yong-Guang Wang, Yao Chen, Li-Xia Ying,