Fundamental research on a double beam laser process for metals

双束激光金属加工基础研究

• 批准号: 370349951
• 负责人: Professor Dr.-Ing. Thomas Bergs, since 7/2019
• 金额: --
• 依托单位: Werkzeugmaschinenlabor - WZL
• 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 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/370349951?language=en
• 关键词: Fundamental; research; double; beam; laser

The present project proposal aims on the enhancement of process understanding of a special double-beam laser process by means of fundamental investigations. The process is defined by simultaneous usage of two laser sources emitting significantly different laser radiation which initiate different physical sub-processes within the process zone. The process itself could be successfully applied on laser brazing of aluminum alloys as well as aluminum steel pairings. From these former works a process explaining model could be derived - this model however contains several open questions. Main objective of the proposed work thus is to close these gaps of knowledge in order to supply a comprehensive process model which inhibits particularly the mutual interactions of the physical sub-processes. Therefore separate process investigations will be conducted for each sub-process, which are: the temperature field, which forms in the laser irradiated zone, the induced thermos-chemical reactions at the 3-phase-border as well as the wetting and spreading behavior of the molten filler material. As main outcome the technique can thus be made applicable for brazing of various materials and material pairing. In addition the technique can be applied to wire based laser deposition welding, in terms that current process technological obstacle can be overcome.

本项目提案旨在通过基础研究增强对特殊双光束激光工艺的工艺理解。该工艺通过同时使用两个激光源来限定，所述两个激光源发射显著不同的激光辐射，所述激光辐射在工艺区内启动不同的物理子工艺。该工艺本身可成功应用于铝合金和铝-钢配对的激光钎焊。从这些以前的工作，一个过程解释模型可以得出-这个模型，但包含几个开放的问题。因此，拟议工作的主要目标是缩小这些知识差距，以提供一个全面的过程模型，特别是抑制物理子过程的相互作用。因此，将对每个子过程进行单独的过程研究，这些子过程是：在激光照射区形成的温度场，在三相边界处诱导的热化学反应以及熔融填充材料的润湿和铺展行为。作为主要成果，该技术可适用于各种材料的钎焊和材料配对。此外，该技术还可应用于丝基激光熔积焊，克服现有工艺技术的障碍。

项目成果

Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition

双束激光金属沉积过程中基于反射测量的温度场研究

• DOI: 10.1117/12.2576112
• 发表时间: 2021
• 作者: Gipperich;Peters
• 通讯作者: Peters

Pulsed Laser Influence on Temperature Distribution during Dual Beam Laser Metal Deposition

脉冲激光对双束激光金属沉积过程中温度分布的影响

• DOI: 10.3390/met10060766
• 发表时间: 2020
• 期刊: Metals
• 影响因子: 2.9
• 作者: Gipperich