Online Detection of Molten Pool Temperature During Metal Forming Based on Selective Laser Melting

Fig. 7. Detection results of 90%Cu-10%Sn powder molten pool temperature at different laser power. (a) Bar of photoelectric voltage with laser power; (b) graph of molten pool temperature with laser power

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Table 1. Simulated data of 90%Cu-10%Sn powder molten pool temperature field
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Table 1. Simulated data of 90%Cu-10%Sn powder molten pool temperature field
Laser powerP_lc/W Centraltemperature ofmolten poolT_c /℃ Diameterof moltenpool D_c /μm Time ofshapingt_c /μs
40 673 0 0
80 1208 24 60
120 1725 42 62
160 2246 58 83

Table 2. Radiation detection result of 90%Cu-10%Sn powder molten pool at laser power of 100 W
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Table 2. Radiation detection result of 90%Cu-10%Sn powder molten pool at laser power of 100 W
Wavelength λ /nm Reaction power P_R /nW
540 462
550 1428
560 324
570 315
580 35124
590 42685
600 1076
610 237
620 321
630 157
640 1004
650 308
660 178

Table 3. Measured voltage signal and molten pool temperature at different laser power
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Table 3. Measured voltage signal and molten pool temperature at different laser power
Laserpower /W Voltage at580 nm /mV Voltage at590 nm /mV Temperatureof moltenpool /℃
40 114 164 983
60 186 284 1054
80 247 387 1141
100 316 498 1226
120 377 597 1310
140 452 709 1390
160 522 812 1473
180 603 942 1570
200 656 1025 1653

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Yuan Jingguang, Li Yu, Liu Jingnan, Chen Congyan, Pang Enlin, Tan Shujie, Jin Yaming. Online Detection of Molten Pool Temperature During Metal Forming Based on Selective Laser Melting[J]. Chinese Journal of Lasers, 2020, 47(3): 302008

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Paper Information

Category: laser manufacturing

Received: Jul. 30, 2019

Accepted: --

Published Online: Mar. 12, 2020

The Author Email: Congyan Chen (chency@seu.edu.cn)

DOI:10.3788/CJL202047.0302008

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Simulated data of 90%Cu-10%Sn powder molten pool temperature field

Table 1. Simulated data of 90%Cu-10%Sn powder molten pool temperature field

Table 2. Radiation detection result of 90%Cu-10%Sn powder molten pool at laser power of 100 W

Table 2. Radiation detection result of 90%Cu-10%Sn powder molten pool at laser power of 100 W

Table 3. Measured voltage signal and molten pool temperature at different laser power

Table 3. Measured voltage signal and molten pool temperature at different laser power