金属粘结剂基AM脱粘和烧结工艺的气体分析与优化*

IF 0.3 Q4 THERMODYNAMICS HTM-Journal of Heat Treatment and Materials Pub Date : 2022-12-01 DOI:10.1515/htm-2022-1033
A. Strauss, P. Quadbeck, O. Andersen, S. Riecker, H. Böhm, T. Weissgärber
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引用次数: 0

摘要

基于粘结剂的金属增材制造工艺在广泛的应用中通常使用有机粘结剂和与工艺相关的添加剂,这些添加剂必须在烧结前热去除。去胶过程通常是经验参数化的,因此离最佳状态还很远。由于基于有机组分热分解过程的脱粘以及随后工艺气氛与金属粉末材料之间的热化学反应使得简单的参数化变得困难,因此在Fraunhofer IFAM上引入了原位仪器。这种测量方法依靠红外光谱和质谱在各种炉概念中了解有机组分分解的气体过程以及随后载气气氛与金属部分之间的热化学反应及其动力学。该方法能够有效地优化温度-时间分布和所需的大气成分,以实现低污染的致密AM组件。本文提出了优化策略,并以316L不锈钢熔丝制造(FFF)组件为例说明了可实现的性能。
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Gas Analysis and Optimization of Debinding and Sintering Processes for Metallic Binder-Based AM*
Abstract Binder-based additive manufacturing processes for metallic AM components in a wide range of applications usually use organic binders and process-related additives that must be thermally removed before sintering. Debinding processes are typically parameterized empirically and thus far from the optimum. Since debinding based on thermal decomposition processes of organic components and the subsequent thermochemical reactions between process atmosphere and metal powder materials make uncomplicated parameterization difficult, in-situ instrumentation was introduced at Fraunhofer IFAM. This measurement method relies on infrared spectroscopy and mass spectrometry in various furnace concepts to understand the gas processes of decomposition of organic components and the subsequent thermochemical reactions between the carrier gas atmosphere and the metal part, as well as their kinetics. This method enables an efficient optimization of the temperature-time profiles and the required atmosphere composition to realize dense AM components with low contamination. In the paper, the optimization strategy is presented, and the achievable properties are illustrated using a fused filament fabrication (FFF) component example made of 316L stainless steel.
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
43
期刊最新文献
HTM Praxis Combined CFD and Heat Treatment Simulation of High-Pressure Gas Quenching Process Optimizing the Solution Annealing of Additively Manufactured AlSi10Mg AWT-Info / HTM 05-2023 Contents / Inhalt
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