Wang Tao, Qiao Weilin, Wang Ning, Zhang Jin, Tang Jie, Wang Hao, Wu Jun. Effect of Scanning Speed on Microstructure and Properties of Laser Cladding NiCoCrAlY Coating[J]. Laser & Optoelectronics Progress, 2020, 57(21): 211403
- Laser & Optoelectronics Progress
- Vol. 57, Issue 21, 211403 (2020)
Fig. 1. NiCoCrAlY alloy powder morphology
Fig. 2. Schematic of laser cladding test
Fig. 3. Macroscopic morphology and cross section morphology of single NiCoCrAlY coating. (a1) (b1) 4 mm/s; (a2) (b2) 8 mm/s; (a3) (b3) 12 mm/s; (a4) (b4) 16 mm/s
Fig. 4. Influence of scanning speed on the forming of single NiCoCrAlY coating. (a) Height and width of coating; (b) dilution rate of coating
Fig. 5. Microstructure of single NiCoCrAlY coating. (a1)-(d1) Areas near top zones; (a2)-(d2) center zones; (a3)-(d3) bonding zones
Fig. 6. NiCoCrAlY coating hardness
Fig. 7. Friction coefficient variation curves. (a) 4 mm/s; (b) 8 mm/s; (c) 12 mm/s; (d) 16 mm/s
Fig. 8. Wear rate
Fig. 9. SEM micrographs of wear tracks of NiCoCrAlY coating. (a) 4 mm/s; (b) 8 mm/s; (c) 12 mm/s; (d) 16 mm/s
Fig. 10. Wear tracks of NiCoCrAlY coating。(a) 3D profile; (b) depth curves of wear cross section
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Table 1. Chemical composition of NiCoCrAlY alloy powder
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Table 2. Chemical composition of IN718 alloy
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Table 3. Contents of main elements of NiCoCrAlY coatings at four scanning speeds
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