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Author:

Chen, Kai (Chen, Kai.) | Xiao, Rong-Shi (Xiao, Rong-Shi.) (Scholars:肖荣诗) | Zhang, Sheng-Hai (Zhang, Sheng-Hai.) | Zuo, Tie-Chuan (Zuo, Tie-Chuan.)

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Abstract:

The experiments were carried out with CO2 (slab) laser. The five stages of the inter actions between laser and powder in the laser welding with powder were analyzed. The influences of the filler metal powder on the laser power density threshold value, weld formation and process stability were studied during CO2 laser welding of aluminum alloy. The experiment results demonstrate that the addition of the metal powder enhances the energy coupling efficiency and reduces the power density threshold value during laser deep welding. Such as the reducing rate is about 50% for A2219 alloy. The experiment results also indicate that the powder can enter the weld pool availably only the powder was delivened to the suitable area after laser beam at the surface of a part. The proper quantity of the alloy powder must match with the right power density and energy input, which can assure to obtain good weld appearance. Meanwhile, the addition of the powder can reduce the fluctuation of the laser-induced plasma and maintain its stability effectively in the laser welding. So a stable welding process and good weld appearance can be obtained in the experiments.

Keyword:

Aluminum alloys Filler metals Stability Carbon dioxide lasers Laser beam welding Powders

Author Community:

  • [ 1 ] [Chen, Kai]National Center of Laser Technology, College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 2 ] [Xiao, Rong-Shi]National Center of Laser Technology, College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 3 ] [Zhang, Sheng-Hai]National Center of Laser Technology, College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 4 ] [Zuo, Tie-Chuan]National Center of Laser Technology, College of Laser Engineering, Beijing University of Technology, Beijing 100022, China

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Source :

Transactions of the China Welding Institution

ISSN: 0253-360X

Year: 2006

Issue: 10

Volume: 27

Page: 33-36

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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