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首页> 外文会议>Conference on Laser Materials Processing Vol.85f: Welding and Modeling, Nov 16-19, 1998, Orlando, FL USA >Multi-factorial analysis of Nd:YAG laser welding of high carbon steels: Effect of laser parameters and weld geometry
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Multi-factorial analysis of Nd:YAG laser welding of high carbon steels: Effect of laser parameters and weld geometry

机译：高碳钢Nd：YAG激光焊接的多因素分析：激光参数和焊缝几何形状的影响

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摘要

The combination of laser processing, different welding geometries and techniques introduces a large number of factors which potentially influence the weld quality. A multi-factorially experiment was designed to assess the effect and interactions of a number of different laser parameters and different beam delivery systems. This included: pulse width, pulse repetition frequency (PRF), translation speed, and normal, pre-heating and post-heating of the weld. A general linear model was used to find the laser parameters which had a significant effect on the weld quality. This resulted in a faster, more efficient optimisation process. The weld quality was quantified by measuring the aspect ratio, weld volume formation rate and tensile strength. The welding was done with Lumonic's MS830 Nd:YAG laser, operating at 1.06 μm, and with a maximum output power capacity of 400 watts. A dual-beam fibre optic delivery system was used to achieve pre-heat and post-heat treatments with a total power of 285 Watts. For the pre-heated geometry, a significant triple-interaction effect was observed for the measurement of weld volume formation rate. Interestingly, for all of the range of laser parameters investigated for the measurements of the tensile strength, there was no significant effect for the double or triple parameter interactions with the normal and post-heated weld geometries. For the pre-heated geometry, however, the interaction between the welding velocity and pulse width was significant. This investigation indicates the significant laser parameters, their interactions, and weld geometries that effect the weld's: aspect ratio, tensile strength and weld volume formation rate.
机译：激光加工，不同的焊接几何形状和技术的结合引入了许多可能影响焊接质量的因素。设计了一个多因素实验，以评估许多不同的激光参数和不同的光束传输系统的效果和相互作用。其中包括：脉冲宽度，脉冲重复频率（PRF），转换速度以及焊缝的正常，预热和后热。使用通用线性模型来查找对焊接质量有重大影响的激光参数。这导致了更快，更有效的优化过程。通过测量长宽比，焊缝体积形成率和拉伸强度来量化焊缝质量。焊接是通过Lumonic的MS830 Nd：YAG激光器完成的，工作频率为1.06μm，最大输出功率为400瓦。使用双光束光纤传输系统来实现总功率为285瓦的预热处理和后热处理。对于预热的几何形状，在测量焊缝体积形成率时观察到了显着的三重作用。有趣的是，对于为测量拉伸强度而研究的所有激光参数范围，与正常和后加热焊缝几何形状的双参数或三参数交互作用都没有显着影响。然而，对于预热的几何形状，焊接速度和脉冲宽度之间的相互作用是显着的。这项研究表明了影响焊缝的重要激光参数，它们之间的相互作用以及焊缝几何形状：长宽比，拉伸强度和焊缝体积形成率。

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