Study on attenuation of laser power by powder flow in coaxial laser cladding

Jichang Liu; Lijun Li; Xiaozhu Xie; Xiangzhong Jin; Jiangang Lu

doi:10.1117/12.573192

13 January 2005 Study on attenuation of laser power by powder flow in coaxial laser cladding

Jichang Liu, Lijun Li, Xiaozhu Xie, Xiangzhong Jin, Jiangang Lu

Proceedings Volume 5629, Lasers in Material Processing and Manufacturing II; (2005) https://doi.org/10.1117/12.573192
Event: Photonics Asia, 2004, Beijing, China

Abstract

In this paper, attenuation of laser power by coaxial powder flow was studied. Given that the distribution of laser power as well as that of powder concentration was defined as a Gaussian function and no grain was shielded from laser by other grains, resolution model of laser power attenuated by coaxial powder flow was established. The attenuation of laser power by powder flow was a function of process parameters such as powder feed rate, moving velocity of grains, spraying angles and waist positions and diameters of laser beam and powder flow, grain diameter and run of laser beam through powder flow. The attenuation coefficient increased with powder feed rate or run of laser beam through powder flow and decreased with rise in grain diameter or moving velocity. The impacts of spraying angles and waist positions and diameters of laser beam and powder flow on attenuation coefficient were complicated. In practice, powder feed rate and run of laser beam through powder flow were both often adjusted, and other parameters were usually constant under certain conditions. In the presented experiment, the experimental results agreed well with the calculation results, and it was demonstrated that attenuation of laser power by coaxial powder flow rose with powder feed rate or run of laser beam through powder flow.

Citation Download Citation

Jichang Liu, Lijun Li, Xiaozhu Xie, Xiangzhong Jin, and Jiangang Lu "Study on attenuation of laser power by powder flow in coaxial laser cladding", Proc. SPIE 5629, Lasers in Material Processing and Manufacturing II, (13 January 2005); https://doi.org/10.1117/12.573192

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