High-power CO2 laser welding of Al alloy plates

Zhaogu Cheng; Guoliang Xu; Quanzhong Zhao; Yongfeng Lu

doi:10.1117/12.497781

3 March 2003 High-power CO₂ laser welding of Al alloy plates

Zhaogu Cheng, Guoliang Xu, Quanzhong Zhao, Yongfeng Lu

Proceedings Volume 4831, First International Symposium on High-Power Laser Macroprocessing; (2003) https://doi.org/10.1117/12.497781
Event: LAMP 2002: International Congress on Laser Advanced Materials Processing, 2002, Osaka, Japan

Abstract

Using a high power pulse transverse flow CO₂ laser developed in our lab, a series of thin Al alloy plates were successfully welded. Effects of processing parameters (beam quality, laser power, welding speed and assisting gas et al) on weldability of Al alloy plates were given. A key technique, artificial keyhole caused by the gap between two Al alloy butt plates is successfully used, which helped to break through their high reflectivity at 10.6 μm wavelength and enhanced the energy coupling efficiency. The weld thickness of Al alloy plates reached 4 mm with 3 kW CO₂ laser average output power. Microhardness and tensile tests showed that for some Al alloys, mechanical properties of the welds could be near or equal to base material with the artificial keyhole technique and suitable processing parameters.

Citation Download Citation

Zhaogu Cheng, Guoliang Xu, Quanzhong Zhao, and Yongfeng Lu "High-power CO₂ laser welding of Al alloy plates", Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); https://doi.org/10.1117/12.497781

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