Development of PVD-coated cutting tools made of natural rocks

开发由天然岩石制成的 PVD ​​涂层切削工具

• 批准号: 509573611
• 负责人: Professor Dr. Bernd Breidenstein
• 金额: --
• 依托单位: Lehrstuhl für Werkstofftechnologie (LWT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/509573611?language=en
• 关键词: Development; PVD; coated; cutting; tools

In order to reduce the dependency on raw materials and the negative environmental influences caused by the production of conventional cutting materials such as tungsten carbide, it is necessary to expand the range of cutting materials. Naturally occurring stones offer potential here. In order to expand the usability of these cutting materials and to enable comparable applications to HSS, there is the perspective of using a technical PVD coating. After a selection of stones that are fundamentally suitable for use as a cutting material as well as for the PVD coating, these are processed using mechanical and chemical coating preconditioning processes. The influence of these preconditioning processes on the subsurface as well as on the coatability and layer adhesion is investigated. With the help of this understanding it is then possible to determine suitable coating systems for stones. The mechanisms of coating adhesion are investigated on the basis of residual stress and coating morphology. Finally, coated stone tools are used for the turning of Al7075 and the coating failure mechanisms are characterised by means of a wear analysis. The originality of the project is characterised by the expansion of the application possibilities of tools made of stone by means of performance-enhancing application of PVD technology.

为了减少对原材料的依赖性以及由常规切割材料（例如碳化钨）产生的负面环境影响，有必要扩大切割材料的范围。自然发生的石头在这里提供了潜力。为了扩展这些切割材料的可用性并为HSS提供可比的应用，可以使用技术PVD涂层的角度。在选择了从根本上适合用作切割材料以及PVD涂层的石头之后，使用机械和化学涂料预处理过程对其进行处理。研究了这些预处理过程对地下以及涂层性和层粘附的影响。借助这种理解，可以确定石头的合适涂层系统。根据残留应力和涂层形态研究了涂层粘附的机制。最后，使用涂层的石材工具用于AL7075的转动，并且涂层破坏机制的特征是通过磨损分析。该项目的独创性的特点是扩大了通过PVD技术的增强性能应用石材制成的工具的可能性。