Chinese Journal of Lasers, Volume. 48, Issue 10, 1002118(2021)
Comparative Study on Cavitation-Resistance and Mechanism of Stellite-6 Coatings Prepared with Supersonic Laser Deposition and Laser Cladding
Figures & Tables(17)
Fig. 1. Micromorphology of Stellite-6 powder required by different technologies. (a) LC technology; (b) SLD technology
Fig. 6. Surface macroscopic morphology of Stellite-6 coating at different cavitation time by different technologies. (a) 0 h; (b) 1 h;(c) 3 h; (d) 5 h; (e) 7 h; (f) 9 h; (g) 11 h; (h) 13 h
Fig. 7. Cross-section morphology and high magnification of Stellite-6 multi-channel lap coating prepared by different technologies. (a) (b) LC technology; (c) (d) SLD technology
Fig. 8. Elemental analysis of Stellite-6 coating/substrate interface prepared by different technologies. (a) LC technology; (b) SLD technology
Fig. 9. Nanoindentation test results of Stellite-6 coating prepared by LC technology and SLD technology. (a) Modulus of elasticity; (b) hardness
Fig. 10. Surface morphology of Stellite-6 coating prepared by LC technology after different cavitation time. (a) 7 h; (b) 13 h
Fig. 11. Surface morphology of Stellite-6 coating prepared by SLD technology after different cavitation time. (a) 7 h; (b) 13 h
Table 1. Chemical composition of Stellite-6 powder
View tableTable 1. Chemical composition of Stellite-6 powder
Element Co Cr W C Ni Mo Fe Si Mn Others Mass fraction /% Bal. 29.00 4.00 1.20 3.00 1.50 3.00 1.10 1.00 <1.0
Table 2. Chemical composition of 17-4 PH stainless steel substrate
View tableTable 2. Chemical composition of 17-4 PH stainless steel substrate
Element Fe Cr Ni Cu Si Mn Mass fraction /% Bal. 17.00 4.00 4.00 1.00 1.00
Table 3. Process parameters of Stellite-6 coating prepared by SLD
View tableTable 3. Process parameters of Stellite-6 coating prepared by SLD
Parameter N2 pressure / MPa N2 temperature / ℃ Stand-off distance / mm Powder feeding rate/ (r·min-1) Traverse speed/ (mm·s-1) Laser power /kW Laser spot diameter/ mm Overlapping rate/ % Value 4 700 30 2.5 10 1.1 4 50
Table 4. Process parameters of Stellite-6 coating prepared by LC
View tableTable 4. Process parameters of Stellite-6 coating prepared by LC
Parameter Laser power/ kW Laser spot diameter/ mm Traverse speed/ (mm·s-1) Power feeding rate/ (g·min-1) Overlapping rate/ % Value 1.6 4 7 13 50
Table 5. Comparison of cavitation mass loss and cavitation rate of Stellite-6 coatings prepared by LC technology and SLD technology
View tableTable 5. Comparison of cavitation mass loss and cavitation rate of Stellite-6 coatings prepared by LC technology and SLD technology
Cavitation time/ h Cumulative mass loss/ mg Cavitation rate/ (mg·h-1) LC SLD LC SLD 1 0.76 0.80 0.76 0.80 2 1.73 1.57 0.97 0.77 3 4.20 2.13 2.47 0.56 4 7.12 2.89 2.92 0.76 5 10.15 3.64 3.03 0.75 6 12.92 4.18 2.77 0.54 7 15.87 4.82 2.95 0.64 8 18.66 5.43 2.79 0.61 9 21.35 6.16 2.69 0.73 10 24.02 6.88 2.67 0.72 11 26.57 7.60 2.65 0.72 12 29.46 8.37 2.79 0.77 13 32.16 9.18 2.70 0.81 14 34.82 10.23 2.66 1.05
Tools
Get Citation
Copy Citation Text
Jingyong Sun, Yuliang Yan, Bo Li, Qijian Shi, Tianshu Xu, Qunli Zhang, Jianhua Yao. Comparative Study on Cavitation-Resistance and Mechanism of Stellite-6 Coatings Prepared with Supersonic Laser Deposition and Laser Cladding[J]. Chinese Journal of Lasers, 2021, 48(10): 1002118
Paper Information
Category: Laser Material Processing
Received: Oct. 28, 2020
Accepted: Dec. 14, 2020
Published Online: May. 18, 2021
The Author Email: Li Bo (libo1011@zjut.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20