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首页> 外文会议>Symposium on Cellular Metals and Polymers; 20041012-14; Furth(DE) >Laser Welding of Cellular Metallic Materials
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Laser Welding of Cellular Metallic Materials

机译：蜂窝金属材料的激光焊接

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The present paper highlights results from the priority program "Cellular Metals" of the Deutsche For-schungsgemeinschaft (DFG SPP 1075). Laser welding has been found a suitable joining method for aluminum foams. The spatially limited energy input of the laser can effectively avoid a collapse of the cellular structure when in combination filler materials are used. CO_2 and Nd:YAG-lasers have both been successfully applied to join cellular aluminum. The use of state-of-the-art laser systems with a high beam quality can constrict the energy input to a small area. Application of filler materials is essential for the compensation of the volume shrinkage due to the drainage of the molten material. Conventional fillers such as filler rod and pre-deposited filler sheets have been investigated as well as foaming-agent containing, innovative fillers such as powder and paste mixtures. Foamable fillers allow for an improved adaptation of the density of the joint zone to the one of the base material. Laser-assisted welding is qualified within the presented work for various cellular materials, including Al-foams from different production processes and different alloys as well as sandwich materials. Furthermore, laser welding is shown as a suitable process to join cellular aluminum with solid structures.
机译：本文重点介绍了德意志联邦理工学院优先项目“蜂窝金属”（DFG SPP 1075）的结果。已经发现激光焊接是用于泡沫铝的合适的连接方法。当组合使用填充材料时，激光器的空间受限的能量输入可有效避免蜂窝结构的崩溃。 CO_2和Nd：YAG激光均已成功应用于蜂窝铝的接合。使用高光束质量的最新激光系统可以将能量输入限制在较小的区域。填充材料的应用对于补偿由于熔融材料的排出而引起的体积收缩是必不可少的。已经研究了常规填料，例如填料棒和预沉积填料板，以及含发泡剂的创新填料，例如粉末和糊状混合物。发泡填料可改善接头区域的密度与基材之一的适应性。在当前的工作中，激光辅助焊接适用于各种蜂窝材料，包括来自不同生产工艺和不同合金的铝泡沫以及夹层材料。此外，激光焊接被示为将蜂窝状铝与固体结构连接的合适方法。

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