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生产碳化钨等常规切削材料对环境造成的负面影响，有必要扩大切削材料的范围。自然形成的石头在这里提供了潜力。为了扩大这些切削材料的可用性，并使其能够与高速钢相媲美，可以使用技术PVD涂层。在选择了基本适合用作切割材料和PVD涂层的石材后，这些石材使用机械和化学涂层预处理工艺进行处理。研究了这些预处理工艺对亚表面、涂层性能和层间附着力的影响。在这种理解的帮助下，就有可能确定适合石材的涂层系统。在残余应力和涂层形貌的基础上，研究了涂层的粘附机理。最后，将涂层石制工具用于Al7075车削，并通过磨损分析表征涂层失效机制。该项目的独创性在于通过PVD技术的性能增强应用，扩展了石材工具的应用可能性。