Investigation of laser cladding high temperature anti-wear composite coatings on Ti6Al4V alloy with the addition of self-lubricant CaF2》.pdf

Applied Surface Science 313 (2014) 243–250 Contents lists available at ScienceDirect Applied Surface Science j o u r n a l h o m e p a g e: w w w. elsev /locate/aps usc Investigation of laser cladding high temperature anti-wear composite coatings on Ti6Al4V alloy with the addition of self-lubricant CaF2 Zhan-Feng Xiang a , Xiu-Bo Liu a,∗ , Jia Ren a , Jian Luo a , Shi-Hong Shi a , Yao Chen a , Gao-Lian Shi b , Shao-Hua Wu b a School of Mechanical Electric Engineering, Soochow University, 178 East Ganjiang Road, Suzhou 215006, PR China b Suzhou Institute of Industrial Technology, Suzhou 215104, PR China a r t i c l e i n f o a b s t r a c t Article history: To improve the high-temperature tribological properties of Ti–6Al–4V alloy, -NiCrAlTi/TiC and - Received 23 April 2014 NiCrAlTi/TiC/CaF2 coatings were fabricated on Ti–6Al–4V alloy by laser cladding. The phase compositions Received in revised form 26 May 2014 and microstructure of the coatings were investigated using X-ray diffraction (XRD) and scanning elec- Accepted 26 May 2014 tron microscope (SEM) equipped with energy dispersive spectroscopy (EDS). The tribological behaviors Available online 8 June 2014 ◦ were evaluated using a ball-on-disk tribometer from ambient temperature to 600 C under dry sliding wear conditions and the corresponding wear mechanisms were discussed. The results indicated