12 September 2002 Laser cladding technique for welding of superthin foil
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It is difficult to get a good welding spot and nearly impossible to weld very thin metal foil (several microns) onto a foreign metal workpiece over 1000 times larger in size. It is often the case when the foil has been vaporized and sputtered while the bigger piece to be welded is not heated In this paper we introduce the laser powder-covered welding technique which has a high success rate. The finished welding spot forms a "micro-rivet" and the laser point welding is the most reliable mutual melting weld. Studies indicate that the laser-cladding technique poses special technical requirements to the melting dynamics of the powder materials. Some useful conclusions are given. The requirements to the parameters of laser pulse are quite different from those of ordinary laser welding. The main points of the technique and the micro-analyses of the welding spot and other features are given. The technique presented is a novel method of welding between tiny piece and workpiece of different size and properties.
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Qiu'e Zhang, Qiu'e Zhang, Yongda Li, Yongda Li, Yong Zheng, Yong Zheng, Li Junxiu Li, Li Junxiu Li, } "Laser cladding technique for welding of superthin foil", Proc. SPIE 4915, Lasers in Material Processing and Manufacturing, (12 September 2002); doi: 10.1117/12.482875; https://doi.org/10.1117/12.482875


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