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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 >Nd: YAG Laser Spot Welding of Very Thin Stainless Steel and Micro X-ray Characterization of Welds
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Nd: YAG Laser Spot Welding of Very Thin Stainless Steel and Micro X-ray Characterization of Welds

机译：Nd：极薄不锈钢的YAG激光点焊和焊缝的X射线表征

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摘要

Very thin (< 0.1 mm, thick) austenitic stainless steel (AISI 316) sheets were spot welded in a lap joint configuration using a pulsed Nd:YAG laser of maximum average power 400 W. A 127 mm, focal length lens was used to produce a spot size of 0.3 mm diameter. The assist gas, argon, was used at 40 psi (280 kPa) pressure and 70 cfh (551 cc/s) flow rate. Spot-welded samples were produced for different beam intensities by varying the pulse energy in predetermined steps. The samples were destructively tested by conducting tension-shear and U-tension tests. They were also non-destructively tested using micro X-ray imaging technique and the National Institute of Health (NIH) image processing software. The pixel intensities of the micro X-ray images were correlated with the strength values obtained from the destructive tests. Good quality welds with strength of 80% - 90% that of the base metal were produced.
机译：使用最大平均功率为400 W的脉冲Nd：YAG激光以搭接方式对非常薄（<0.1毫米，厚）的奥氏体不锈钢（AISI 316）点焊。使用127毫米焦距透镜生产直径为0.3毫米的光斑。以40 psi（280 kPa）的压力和70 cfh（551 cc / s）的流量使用辅助气体氩气。通过在预定步骤中改变脉冲能量，可以产生用于不同光束强度的点焊样品。通过进行拉伸-剪切和U-拉伸测试对样品进行破坏性测试。还使用微X射线成像技术和美国国立卫生研究院（NIH）图像处理软件对它们进行了非破坏性测试。微X射线图像的像素强度与从破坏性测试获得的强度值相关。可以生产出强度为母材强度的80％-90％的优质焊缝。

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