Practical and theoretical investigations into inert gas cutting of 304 stainless steel using a high brightness fiber laser
Practical and theoretical investigations into inert gas cutting of 304 stainless steel using a high brightness fiber laser
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使用高亮度光纤激光器惰性气体切割 304 不锈钢的实践和理论研究
DOI：
10.2351/1.2832402
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发表时间：
2008
影响因子：
2.1
通讯作者：
W. O'Neill
中科院分区：
文献类型：
--
作者：
M. Sparkes;M. Gross;S. Celotto;Tao Zhang;W. O'Neill
2.2 kW光纤激光器用于对截面厚度在6-10 mm范围内的不锈钢进行一系列惰性切割试验。 改变气体压力，焦点位置和喷嘴直径的切割性能的变化进行了研究。结果表明，与高亮度激光切割相关的困难，特别是在通过狭窄的切口获得充分的熔体喷射;观察到两种不同的熔体喷射故障机制：（I）在上部区域中的熔体去除失败导致熔体喷射出顶面和（II）不良的底部喷射给重铸和浮渣问题的基础上的削减。这些现象的详细扫描电子显微镜图像。一个计算流体动力学模型是用来显示在切割中心的理论气体性能的明显差异，显示大多数模型，并在边缘的熔体喷射发生。实验和理论上也表明，熔体喷射的改善，为…
A 2.2 kW fiber laser was used in a series of inert cutting trials on stainless steels of section thicknesses in the range of 6–10 mm. Variations in the cutting performance with changing gas pressure, focal position, and nozzle diameter were investigated. Results showed the difficulties associated in cutting with high brightness lasers, specifically in obtaining full melt eject through narrow kerfs; two distinct melt eject failure mechanisms were observed: (I) Failure of melt removal in the upper region resulted in melt ejecting out of the top surface and (II) poor base ejection giving recast and dross problems on the base of the cut. Detailed scanning electron microscope images of these phenomena are presented. A computational fluid dynamic model is used to show distinct differences in the theoretical gas performance at the center of the cut, displayed by most models, and at the edges where the melt eject is taking place. Melt eject is also shown both experimentally and theoretically to be improved for th...