Stabilization of the interface temperature in laser beam brazing of aluminum alloys with aluminum-based brazing alloys

铝合金与铝基钎料的激光束钎焊中界面温度的稳定

• 批准号: 376511346
• 负责人: Professor Dr.-Ing. Frank Vollertsen
• 金额: --
• 依托单位: BIAS - Bremer Institut für Angewandte Strahltechnik GmbH
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/376511346?language=en
• 关键词: Stabilization; interface; temperature; laser; beam

Nowadays, laser brazing is a well-established process in the automotive industry for zinc coated steel. The technology enables high seam qualities for joints being visible for the customer. In contrast to steel, laser brazing of aluminum with aluminum based filler material is not established yet. One of the main challenges in this case is the process window due to the small difference between the solidus temperature of the base material and the liquidus temperature of the filler material.The wetting process and the time-temperature cycle show periodic behaviors in laser brazing of aluminum alloys, which are disadvantageous with respect to partial melting of the base material or wetting defects. In order to achieve reliable laser brazing of aluminum alloys with aluminum based filler material the temperature at the interface between braze and base material has to be precisely adjusted. The project is based on the hypothesis that the periodic behavior of the wetting process and, as result, the interface temperature can be stabilized by the periodic modulation of process parameters.

如今，激光钎焊是汽车行业镀锌钢的一种成熟工艺。该技术使客户能够看到接缝的高接缝质量。与钢相比，用铝基填充材料对铝进行激光钎焊尚未建立。在这种情况下，主要的挑战之一是工艺窗口，因为基材的固相线温度和填料的液相线温度之间的差异很小。润湿过程和时间-温度循环在铝合金的激光钎焊中表现出周期性行为，这对于基材的部分熔化或润湿缺陷是不利的。为了用铝基填料实现铝合金的可靠激光钎焊，必须精确调节钎焊料和基材之间界面处的温度。该项目是基于这样的假设，即润湿过程的周期性行为，因此，界面温度可以通过过程参数的周期性调制来稳定。

项目成果

Influence of the Wire Feeding on the Wetting Process during Laser Brazing of Aluminum Alloys with Aluminum-Based Braze Material

铝基钎料激光钎焊铝合金时送丝对润湿过程的影响

• DOI: 10.3390/jmmp3040083
• 发表时间: 2019
• 期刊: Journal of Manufacturing and Materials Processing
• 影响因子: 3.2
• 作者: Leithäuser;Woizeschke
• 通讯作者: Woizeschke