Application behaviour of sinter-metallic diamond grinding wheels with addition of graphite

• Applicant: Professor Dr.-Ing. Berend Denkena
• Subject Area: Metal-Cutting and Abrasive Manufacturing Engineering
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 528459051

The overall objective of this project is the availability of a load-specific model for the design of novel metal-bonded highly porous diamond grinding wheels for the machining of cemented carbides. The project will close the knowledge gap of the relationships between the addition of graphite and chromium to the bond matrix, the resulting abrasive coating properties, and the application behavior of sintered metallic diamond grinding wheels. The first sub-objective includes knowledge about the adjustability of higher porosity and thermal conductivity of the bond by graphite addition. The second sub-objective is to obtain knowledge about the interactions between chromium and graphite addition on carbide formation between diamond and bond and on carbide formation between graphite particles and bond, respectively. The interactions will be characterized by means of mechanical and thermal properties. In the third sub-objective, knowledge will be gained about the application behavior as a function of the additional porosity and higher thermal conductivity due to the graphite addition and the carbide formation. For the fulfilment of the sub-objective, knowledge on a microscopic and macroscopic level has to be generated. Finally, the knowledge is summarized in the fourth sub-objective for the availability of an empirical model to describe the application behavior as a function of the manufacturing parameters. Thus, on the one hand, a load-specific design of the manufacturing process for minimizing wear and, on the other hand, a design of the manufacturing process for minimizing edge zone changes of the workpiece is possible.

• DFG Programme: Research Grants