激光点焊过程中激光耦合效率的动态和绝对测量

B. Simonds, J. Sowards, J. Hadler, E. Pfeif, B. Wilthan, Jack R. Tanner, C. Harris, P. Williams
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引用次数: 7

摘要

激光金属加工过程中,由于温度和多相变化,激光吸收(耦合效率)变化很快。我们发现可用的文献数据有限,但这一特性对于精确的过程模拟以及对高功率激光-物质相互作用动力学的基本理解至关重要。在316L不锈钢激光点焊过程中,采用积分球测量了从传导到锁孔焊接过程中10 ms激光点焊的动态绝对吸收功率,其分辨率为亚微秒级。我们的数据显示了几个重要的特征,包括熔点和钥匙孔的形成。从光学数据得出的结论得到了焊缝截面分析的支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic and absolute measurements of laser coupling efficiency during laser spot welds
Abstract Laser absorptance (coupling efficiency) changes rapidly during laser metal processing due to temperature and multiple phase changes. We find that there is limited literature data available, but that this property is vital for accurate process simulations, as well as the fundamental understanding of the dynamics of high-power laser-matter interaction. We measure the dynamic, absolute absorbed power with sub-microsecond resolution during a 10 ms laser spot weld in 316L stainless steel from conduction to keyhole welding conditions using an integrating sphere. Our data show several important features including the points of melting and keyhole formation. Conclusions from the optical data are supported by weld cross-section analysis.
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