Chinese Journal of Lasers, Volume. 46, Issue 10, 1002001(2019)
Experimental Study on Gradient Wettable Surface Fabricated by Laser Rapid Processing
Figures & Tables(10)
Fig. 1. Variation in specimen surface contact angle with time after laser processing. (a) 0 d; (b) 10 d; (c) 20 d; (d) 30 d; (e) 40 d; (f) 50 d
Fig. 2. Surface microstructures of same sample in air for different time. (a) 0 d; (b) 30 d
Fig. 3. Effects of heat treatment temperature on surface C content and contact angle
Fig. 5. Gradient wettable surface prepared by adjusting laser scanning interval. (a) Variation of contact angle with laser scanning spacing; (b) gradient wettable surface
Table 1. Measurement of surface composition of 304 stainless steel
View tableTable 1. Measurement of surface composition of 304 stainless steel
304 stainless steel Mass fraction /% C O Si Cr Fe Ni 0 d after laser processing 5.73 31.22 0.72 12.22 47.08 3.04 30 d after laser processing 11.48 33.44 0.7 10.49 41.23 2.66 Amplitude of variation /% 100.34 7.11 2.78 14.16 12.43 12.5
Table 2. Effect of heat treatment time on surface C content at different heating temperatures
View tableTable 2. Effect of heat treatment time on surface C content at different heating temperatures
Heating temperature /℃ Mass fraction of C /% Heating time of 10 min Heating time of 40 min 50 6.21 7.27 100 5.21 7.66 150 7.01 9.18 200 8.81 9.58
Table 3. Scanning interval of different regions on gradient wettable surface
View tableTable 3. Scanning interval of different regions on gradient wettable surface
Sample No. Scanning interval /μm Region 1 Region 2 Region 3 Region 4 Region 5 Region 6 1# 100 200 300 500 600 700 2# 100 300 500 600 700 - 3# 100 300 500 700 - - 4# 100 300 700 - - - 5# 100 500 700 - - -
Table 4. Analysis results on droplet motion with time
View tableTable 4. Analysis results on droplet motion with time
Sample First gradient /(°) Second gradient /(°) Third gradient /(°) Moving time /s Actual range /mm Velocity / (mm·s-1) 1# 2.74 26.57 9.36 0 0 0 2# 29.31 9.36 9.79 0.060 2.70 45.00 3# 29.31 9.36 37.33 0.062 2.85 45.97 4# 29.31 46.69 - 0.080 4.05 50.63 5# 38.67 37.33 - 0.050 2.10 42.00
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Yunxia Ye, Yuanfang Liu, Tingting Du, Yinqun Hua, Yonghong Fu, Xiangyang Li, Xuan Huang. Experimental Study on Gradient Wettable Surface Fabricated by Laser Rapid Processing[J]. Chinese Journal of Lasers, 2019, 46(10): 1002001
Paper Information
Category: laser manufacturing
Received: Mar. 20, 2019
Accepted: May. 28, 2019
Published Online: Oct. 25, 2019
The Author Email: Ye Yunxia (yeyunxia@mail.ujs.edu.cn)
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