Acta Optica Sinica, Volume. 43, Issue 4, 0414003(2023)
Influence of Substrate Irradiation Proportion on Stability of Laser Coaxial Wire-Melting Deposition
Figures & Tables(15)
Fig. 2. Hollow annular laser beam. (a) Three-dimensional model diagram; (b) diagram of negative defocus light path
Fig. 3. Diagram of energy distribution model. (a) Three-dimensional model; (b) contour cross section and scanning diagram
Fig. 4. Diagrams of laser irradiation. (a) Three-dimensional model; (b) irradiation without wire; (c) irradiation with wire
Fig. 5. Mathematical model of irradiation situation. (a) Three-dimensional model of irradiation situation; (b) simplified diagram of irradiation model
Fig. 6. Energy density distribution diagrams of irradiated substrate area. (a) Diagram of irradiated situation; (b) simplified diagram of irradiated situation
Fig. 7. Diagrams of actual light spots.(a) F=0; (b) F=-1 mm; (c) F=-2 mm; (d) F=-3 mm; (e) F=-4 mm; (f) F=-5 mm
Fig. 8. Energy intensity curves for different r. (a) F=0, PSI=36%; (b) F=-1 mm, PSI=50%; (c) F=-2 mm, PSI=58%; (d) F=-3 mm, PSI=65%; (e) F=-4 mm, PSI=70%; (f) F=-5 mm, PSI=73%
Fig. 9. Diagrams of deposited tracks and their cross sections. (a) PSI=36%; (b) PSI=50%; (c) PSI=58%; (d) PSI=65%; (e) PSI=70%;(f) PSI=73%
Fig. 10. Diagrams of wire melting process obtained by high-speed camera. (a) 258th frame,(b) 382nd frame, and (c) 473rd frame for "droplet" transition method (2880 frames); (d) 127th frame, (e) 348th frame, and (f) 511st frame for "bead" transition method (3178 frames)
Fig. 11. Divided pictures of wire melting process. (a)-(c) "Droplet" transition method; (d)-(f) "bead" transition method
Table 1. Chemical element component of 304 stainless steel substrate and wire (mass fraction)
View tableTable 1. Chemical element component of 304 stainless steel substrate and wire (mass fraction)
Element C Si Mn Cr P Ni S Fe Substrate 0.05 0.40 1.12 18.13 0.026 8.20 0.030 Balance Wire 0.01 0.52 1.90 18.46 0.015 8.57 0.007 Balance
Table 2. Deposition process parameters
View tableTable 2. Deposition process parameters
Parameter Value Power P /W 3800 Feeding speed Vw /（mm·s-1） 26 Scanning speed VS /
（mm·s-1）
2 Defocus amount F /mm 0， -1， -2， -3， -4， -5
Table 3. Main parameters of laser
View tableTable 3. Main parameters of laser
Parameter Value Rated output power /W 6000 Center wavelength /nm 1080±5 Photoelectric conversion efficiency /% ≥35 Output fiber diameter /μm 100
Table 4. Geometric parameters of deposited tracks and their cross sections
View tableTable 4. Geometric parameters of deposited tracks and their cross sections
Image
（PSI）
Width W /mm Height H /mm K Depth /mm Dilution rate /
%
Fig. 9 （a）（36%）8.20 1.82 4.50 1.00 34.2 Fig. 9 （b）（50%）7.84 2.02 3.88 0.94 31.4 Fig. 9 （c）（58%）7.02 2.16 3.25 0.82 24.2 Fig. 9 （d）（65%）8.00 1.64 4.87 1.52 38.2 Fig. 9 （e）（70%）8.24 2.32 3.55 1.60 30.4 Fig. 9 （f）（73%）8.42 2.48 3.39 1.84 40.9
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Lei Jin, Shihong Shi, Chao Wei, hao Cao, Tuo Shi. Influence of Substrate Irradiation Proportion on Stability of Laser Coaxial Wire-Melting Deposition[J]. Acta Optica Sinica, 2023, 43(4): 0414003
Paper Information
Category: Lasers and Laser Optics
Received: Aug. 9, 2022
Accepted: Sep. 21, 2022
Published Online: Feb. 16, 2023
The Author Email: Shihong Shi (jinshusihan4231@163.com)
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