| ZHANG You-yi.Performance of Supersonic Flame Spray Coating and Plasma Spray Welding Layer for Turbine Blade Steel[J],49(10):99-105 |
| Performance of Supersonic Flame Spray Coating and Plasma Spray Welding Layer for Turbine Blade Steel |
| Received:April 09, 2020 Revised:October 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.10.011 |
| KeyWord:supersonic flame spraying plasma spray welding coating micro-hardness particle erosion resistance water erosion resistance |
| Author | Institution |
| ZHANG You-yi |
Sichuan Engineering Technical College, Deyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to improve the particle erosion resistance and water erosion resistance of turbine blade steel 1Cr12Ni2W1Mo1V. Cr3C2-NiCr75-25 coating, WC-10Co-4Cr coating and Stellite 6 alloy spray welding coating were respectively prepared on the base metal by supersonic flame spraying and plasma spray welding. The microstructures of the three coatings were observed by SEM and the micro-hardness, friction and wear resistance, particle erosion resistance and water erosion resistance of the three coatings were tested and analyzed. The average micro-hardness of the three coatings was significantly higher than that of the base metal, especially the average micro-hardness of WC-10Co-4Cr coating was the highest, with a value of 1314.6 HV4.9 N. Stellite 6 alloy coating was used as friction pair, the friction coefficient of Cr3C2-NiCr75-25 coating was between 0.5 and 0.7, with a weight loss of 0.0131 g, while that of WC-10Co-4Cr coating was between 0.5 and 0.6 with a weight loss of 0.0007 g. Obviously, WC-10Co-4Cr coating had better friction performance. In the test of particle erosion resistance, the maximum wear mark depth of the coating from deep to shallow was: base metal (94.658 μm), Stellite 6 alloy coating (85.932 μm), Cr3C2-NiCr75-25 coating (81.163 μm), and WC-10Co-4Cr coating (11.864 μm). The corresponding wear rates of the coatings were also gradually reduced. The maximum depth of water erosion groove on the surface from deep to shallow was: base metal (445 μm), Stellite 6 alloy coating (70 μm), Cr3C2-NiCr75-25 coating (80 μm), and WC-10Co-4Cr coating (41 μm) and the corresponding mass loss gradually changed from 30 mg/cm2 to 3.3 mg/cm2. The three kinds of coatings have certain friction and wear resistance, particle erosion resistance and water erosion resistance, among which WC-10Co-4Cr coating has the best performance due to the highest micro-hardness caused by the dispersion of a large number of WC hard phase in the coating and the synergistic effect of other related properties. |
| Close |
|
|
|