激光与熔覆粉末作用效率的计算及影响因素

详细信息

Calculation of the interaction efficiency between the laser beam and the cladding powder and effective factors

1.
Laser Processing Research Center, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084;
2.
The Quartermaster University of PLA, Changchun, 130062

摘要: 在分析自动送粉式激光熔覆材料加入方式、粉末颗粒运动规律、吸热特性以及粉末云对激光束强度衰减规律的基础上,建立反映颗粒与激光相互作用效率的方程;利用金相法检测了熔覆层的宏观参数并结合相关材料的物理参数和工艺参数进行了理论计算。系统研究了影响激光作用效率的因素,对激光作用效率随扫描速度的变化出现最大值给出了合理的解释。
- 激光熔覆 /
- 作用效率 /
- 衰减
Abstract: On the basis of the analysis of the feeding pattern of the coating material,its behavior in the laser beam and the attenuation of laser beam by particle cloud during the process of laser coating with automatic powder feeding,the methods to calculate the interaction efficiency η of laser and particle speed v0 are presented.The equation of the interaction efficiency η is established and expressions relating the parameters in the processes are obtained.The factors affecting the interaction efficiency η is studied carefully.The interaction efficiency η is calculated by means of metallography.A reasonable explanation about why a maximum interaction efficiency η is observed with the scanning speed varies is presented.
- laser cladding /
- interaction efficiency /
- attenuation

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