Study on process stability and seam characteristics of high power laser welding with filling wire for high thickness steel

Yan Cai; Guohua Li; Jian Huang; Lianglei Zhao; Yixiong Wu

doi:10.1117/12.760347

1 February 2008 Study on process stability and seam characteristics of high power laser welding with filling wire for high thickness steel

Yan Cai, Guohua Li, Jian Huang, Lianglei Zhao, Yixiong Wu

Author Affiliations +

Proceedings Volume 6825, Lasers in Material Processing and Manufacturing III; 682504 (2008) https://doi.org/10.1117/12.760347
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

This paper focused on a systemic solution to high power laser welding for high thickness shipbuilding steel. The laser induced plasma not only absorbs laser energy but also affect welding process stability especially when laser power is higher than 10 kW. The electron density, electron temperature and plasma height are analyzed in paper with high speed camera and spectrometer in this paper. Laser Supported Combustion (LSC) result in instable laser welding process and cause bad seam quality. As an effective method to suppress plasma and keep stable welding process, flow rate of side blowing gas is analyzed. The relationship between Seam shape, its mechanical properties and welding parameters is studied. Experiments results showed that High power laser welding is a qualified and efficient method for high thickness shipbuilding steel.

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Yan Cai, Guohua Li, Jian Huang, Lianglei Zhao, and Yixiong Wu "Study on process stability and seam characteristics of high power laser welding with filling wire for high thickness steel", Proc. SPIE 6825, Lasers in Material Processing and Manufacturing III, 682504 (1 February 2008); https://doi.org/10.1117/12.760347

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KEYWORDS

Plasma

Laser welding

High power lasers

Absorption

Laser processing

Gas lasers

Laser stabilization

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