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The Performance of PVD Coated Grade in Milling of ADI 800
Abstract:The aim of this investigation is to study the performance of the new generation of the PVD coated grade and to map the influence of cutting conditions on the tool life in milling of ADI (Austempered Ductile Iron). The results show that chipping is the main wear mechanism which determines the tool life in dry condition and notch wear in wet condition for this application. This due to the different stress mechanisms and preexisting cracks in the coating. The wear development shows clearly that the new PVD coating (C20) has the best ability to delay the chipping growth. It was also found that a high content of Al in the new coating (C20) was especially favorable compared to a TiAlN multilayer with lower Al content (C30) or CVD coating. This is due to fine grains and low compressive stress level in the coating which increase the coating ability to withstand the mechanical and thermal impact. It was also found that the use of coolant decreases the tool life with 70-80% compare to dry milling.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1073158Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1677
 Klocke F. and Klöpper C. "Machining of ADI" WZL- Laboratory of Machine Tools and Production Engineering, University of Technology, Aachen, Germany
 F. Zanardi "Fatigue Properties and Machinability of ADI" La metallurgia Italiana 10/2005-p27 - 32.
 Kristin Brandenberg "Successfully Machining Austempered Ductile Iron" Applied process Inc. Technologies Div.-Livonia, Michigan, USA-October2001.