Infrared and Laser Engineering, Volume. 51, Issue 11, 20220074(2022)
Real time monitoring of cooling rate in laser metal-wire forming process under infrared thermography
Figures & Tables(21)
Fig. 11. Molten pool temperature under different wire feeding speeds
Table 1. Related parameters of two-color pyrometer
View tableView in ArticleTable 1. Related parameters of two-color pyrometer
Detector Indium potassium arsenic detector×2 Spectral range/µm Passageway 1: 1.45–1.65 Passageway 2: 1.65–1.8 Measuring range/℃ 600–2500 Measurement accuracy/℃ <2500 Response time/ms <1 Exposure time/ms <0.5
Table 2. Deviation rate under different emissivities
View tableView in ArticleTable 2. Deviation rate under different emissivities
Serial number Emissivity Deviation rate 1 0.08 5.8% 2 0.09 5.6% 3 0.1 4.1% 4 0.11 6.2% 5 0.12 7.3%
Table 3. Process parameters at different scanning speeds
View tableView in ArticleTable 3. Process parameters at different scanning speeds
Number Laser power P/W Scanning speed Vs/mm·min−1 Wire feeding ratio Wire feeding speed Vf/ mm·min−1 A1 175 60 1∶2 120 A2 175 120 1∶2 240 A3 175 180 1∶2 360 A4 175 240 1∶2 480 A5 175 300 1∶2 600
Table 4. Process parameters under different laser powers
View tableView in ArticleTable 4. Process parameters under different laser powers
Number Laser power P/W Scanning speed Vs/mm·min−1 Wire feeding ratio Wire feeding speed Vf/mm·min−1 B1 200 60 1∶2 120 B2 175 60 1∶2 120 B3 150 60 1∶2 120 B4 125 60 1∶2 120 B5 100 60 1∶2 120
Table 5. Process parameters under different wire feeding speeds
View tableView in ArticleTable 5. Process parameters under different wire feeding speeds
Number Laser power P/W Scanning speed Vs/mm·min−1 Wire feeding ratio Wire feeding speed Vf/mm·min−1 C1 125 120 1∶1 120 C2 125 120 1∶2 240 C3 125 120 1∶3 360 C4 125 120 1∶4 480 C5 125 120 1∶5 600
Table 6. Average cooling rate and average molten pool temperature of sample A
View tableView in ArticleTable 6. Average cooling rate and average molten pool temperature of sample A
Number Average cooling rate/℃· s−1 Average molten pool temperature/℃ A1 648 1821 A2 1131 1730 A3 1517 1637 A4 1927 1566 A5 2389 1482
Table 7. Average cooling rate and average molten pool temperature of sample B
View tableView in ArticleTable 7. Average cooling rate and average molten pool temperature of sample B
Number Average cooling rate/℃·s−1 Average molten pool temperature/℃ B1 698 1930 B2 642 1821 B3 565 1720 B4 498 1640 B5 434 1510
Table 8. Average cooling rate and average molten pool temperature of sample C
View tableView in ArticleTable 8. Average cooling rate and average molten pool temperature of sample C
Number Average cooling rate/℃·s−1 Average molten pool temperature/℃ C1 1326 1618 C2 1258 1562 C3 1210 1519 C4 1154 1474 C5 1104 1423
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Shuanjun Song, Chenghong Qiu, Wei Xu, Xiaofei Ren, Anli Zhang. Real time monitoring of cooling rate in laser metal-wire forming process under infrared thermography[J]. Infrared and Laser Engineering, 2022, 51(11): 20220074
Paper Information
Category: Lasers & Laser optics
Received: Jan. 25, 2022
Accepted: --
Published Online: Feb. 9, 2023
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