Latest developments in coaxial multiwire high-power laser cladding

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Filofteia-Laura Toma, Holger Hillig, Marc Kaubisch, Irina Shakhverdova, Marko Seifert, Frank Brueckner
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Abstract

Laser cladding is widely used in the industry to precisely apply tailored surface coatings, as well as three-dimensional deposits for repair and additive manufacturing of metallic parts. However, the processing of larger components is economically challenging mainly because of low deposition rates. At Fraunhofer IWS, a Laserline fiber-coupled diode laser with 20 kW power has been employed for over a decade to develop competitive coating solutions with powder-based laser cladding. The deposition rates achieved with this technology is comparable to common PTA technique at the same time bringing significant advantages in terms of reduced heat affected zone, distortion, and savings in material resources. While high-power powder-based laser cladding is an industrially established coating technology, for example, to coat hydraulic cylinders or most recently brake discs, a high-productivity solution for wire-based processes is still challenging. Fraunhofer IWS has developed a new nozzle for high-power high-productivity laser wire cladding for coating and additive manufacturing, the so-called COAXquattro. This system enables to feed at the same time four wires into the melt pool, reaching deposition efficiencies in the same range as a powder-based laser process. For selected materials, the improvement in coating quality compared to powder laser cladding is achieved. Furthermore, with COAXquattro system simultaneous feeding of powder particles to wire cladding presents a great potential for in situ alloying and cost-effective production of new compositions on material alloying or hardmetal-reinforced composites for coating application and 3D additive manufacturing.
同轴多线大功率激光熔覆的最新进展
激光熔覆在工业中广泛应用于精确应用定制的表面涂层,以及用于金属零件修复和增材制造的三维沉积。然而,较大部件的加工在经济上具有挑战性,主要是因为沉积速率低。在Fraunhofer IWS,功率为20 kW的Laserline光纤耦合二极管激光器已经使用了十多年,用于开发具有竞争力的粉末基激光熔覆涂层解决方案。该技术的沉积速率与普通PTA技术相当,同时在减少热影响区、变形和节省材料资源方面具有显著优势。虽然大功率粉末激光熔覆是一种工业上成熟的涂层技术,例如,用于涂覆液压缸或最近的制动盘,但基于线材的工艺的高生产率解决方案仍然具有挑战性。Fraunhofer IWS开发了一种用于涂层和增材制造的高功率高生产率激光线材熔覆的新型喷嘴,即COAXquattro。该系统能够同时将四根导线送入熔池,达到与粉末激光工艺相同范围的沉积效率。对于选定的材料,与粉末激光熔覆相比,涂层质量得到了改善。此外,COAXquattro系统将粉末颗粒同时送入线材包覆层,为原位合金化提供了巨大的潜力,并为涂层应用和3D增材制造提供了材料合金化或硬质金属增强复合材料的新组合物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.60
自引率
9.50%
发文量
125
审稿时长
>12 weeks
期刊介绍: The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.
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