The Energy Transfer Efficiency in Laser Welding Process
The Energy Transfer Efficiency in Laser Welding Process
复制标题
激光焊接过程中的能量传递效率
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
S. Chiang
中科院分区：
文献类型：
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作者：
T. H. Kim;C. Albright;S. Chiang
测量了激光焊接的加工效率随移动速度的变化。用聚焦的2KW CO2激光在不同的焊接速度下对低碳钢平板堆焊过程中的温度进行了测量。激光焊接过程效率(提供给工作的功率/光束中的功率)是通过焊接试件的热含量与可用激光能量(功率×时间)的比率来计算的。在中等速度下的深熔焊区，激光焊接效率(相当于光束的吸收率)约为65%；而在高速下的浅熔透区，激光焊接效率仅为28%左右。在深熔焊中，熔透腔内的多次反射增强了吸收系数。基于腔内四次反射的计算可以解释观察到的工艺效率。
The process efficiency of laser beam welding was measured as a function of travel speed. Temperature measurements were carried out during the bead‐on‐plate laser welding of mild steel with a focused 2KW CO2 laser beam at various welding travel speeds. The laser welding process efficiency (power delivered to work/power in the beam) was calculated from the ratio of the heat content of the welded the specimen to the available laser beam energy (power × time). In the deep penetration welding region at intermediate travel speeds, the laser beam welding process efficiency (equal to the beam absorptance) was about 65%; but it was only about 28% in the shallow penetration region at high travel speeds. In deep penetration welding, multiple reflections within the penetration cavity enhance absorptance. A calculation based on four reflections within the cavity can account for the observed process efficiency.