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以及碳化钨等传统切削材料生产对环境造成的负面影响，有必要扩大切削材料的范围。天然石材在这里提供了潜力。为了扩大这些切削材料的可用性并实现与高速钢相当的应用，可以考虑使用技术性 PVD ​​涂层。在选择基本适合用作切割材料以及 PVD ​​涂层的宝石后，使用机械和化学涂层预处理工艺对这些宝石进行加工。研究了这些预处理过程对表面下以及可涂覆性和层附着力的影响。借助这种理解，就可以确定适合宝石的涂层系统。根据残余应力和涂层形态研究了涂层附着力的机制。最后，使用涂层石材工具车削 Al7075，并通过磨损分析来表征涂层失效机制。该项目的独创性在于通过PVD技术的性能增强应用，扩大了石制工具的应用可能性。