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Investigation of the combined process chain based on SLM and LMD

基于SLM和LMD的组合工艺链研究

基本信息

批准号：
378970463
负责人：
Professor Dr.-Ing. Michael Rethmeier
金额：
--
依托单位：
Fachgebiet Werkzeugmaschinen und Fertigungstechnik
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/378970463?language=en
关键词：
Investigation combined process chain based

项目摘要

Additive manufacturing (AM) has become more important in recent years with applications in Rapid Prototyping, Rapid Tooling and Rapid Manufacturing. This leads to shorter product development times as well as shorter manufacturing times. AM offers tremendous advantages such as free geometric design as well feature-integration, e.g. cooling channels or lightweight structures. With the current state of the art, it is not possible to produce complex and fine structures while achieving high build rates at the same time. Powder based applications such as selective laser melting (SLM) allow the build-up of very complex structures. However, due to low build speed it is often not economically viable in series or mass production. In addition, the maximum size of the components is limited by the size of the process chamber. Due to the material position in a powder bed, a combination of different materials at selected locations is not yet possible. In contrast, laser metal deposition (LMD) is an additive technology with high build rates. The part size is not limited and a change of materials is easily implemented. However, the process can only build rough structures. A combined process chain of SLM and LMD offers great potential to combine the advantages of the individual methods.The aim of this project is to understand the fundamentals and effects in the process chain SLM-LMD. Increased functionality of additive manufactured parts is a result of these investigations. In this combined process chain, SLM is used for the production of complex structures. LMD is responsible for the production of the massive and bigger geometries. The flexible material change in process offers additional opportunities to extend the functionality of the process chain. For a basic understanding of the process combination, an investigation is necessary to determine the extent in which SLM structures are affected by the following LMD material application, and what effects and properties occur in the connection zone as well in the entire specimen. Finally, empirical models for selected functional properties will be derived from the technological studies for both processes. The results should provide a knowledge base for further applications of the combined additive process chain. Inconel 718 will be used as a basic material for the whole project, due to the high corrosion resistance, excellent high-temperature properties and relevance for components in turbine production.

近年来，增材制造（AM）在快速成型，快速模具和快速制造中的应用变得越来越重要。这导致更短的产品开发时间以及更短的制造时间。AM提供了巨大的优势，例如自由的几何设计以及功能集成，例如冷却通道或轻质结构。在现有技术的情况下，不可能在实现高构建速率的同时生产复杂和精细的结构。基于粉末的应用，例如选择性激光熔化（SLM），允许构建非常复杂的结构。然而，由于低构建速度，其在批量或大规模生产中通常在经济上不可行。此外，部件的最大尺寸受到处理室的尺寸的限制。由于粉末床中的材料位置，在选定位置处的不同材料的组合尚不可能。相比之下，激光金属沉积（LMD）是一种具有高构建速率的增材技术。零件尺寸不受限制，材料的变化很容易实现。然而，该过程只能构建粗略的结构。SLM和LMD的组合工艺链提供了巨大的潜力，联合收割机结合个别方法的优点。本项目的目的是了解工艺链SLM-LMD的基本原理和效果。增材制造部件的功能性增加是这些研究的结果。在这个组合工艺链中，SLM用于生产复杂结构。LMD负责生产大规模和更大的几何形状。灵活的材料变更过程为扩展工艺链的功能提供了额外的机会。为了基本了解工艺组合，有必要进行调查，以确定SLM结构受到以下LMD材料应用影响的程度，以及连接区以及整个样品中发生的影响和特性。最后，选定的功能特性的经验模型将来自这两个过程的技术研究。研究结果将为进一步应用组合增材工艺链提供知识基础。Inconel 718将作为整个项目的基础材料，因为它具有高耐腐蚀性，优异的高温性能和与涡轮机生产部件的相关性。