Correlation between Coating Properties and Thermal Load of Craln-Coated Cutting Tools during Machining of AISI4140

Abstract:

In this study a novel inverse hybrid experimental-simulative approach to the determination of the thermal tool load as a function of the coating properties during orthogonal turning of AISI4140 with Cr_1-xAl_xN-coated cemented carbide tools is presented. The approach consists of an experimental determination of the internal tool temperatures by means of fiber-optic pyrometry as input for an inverse FEM-based simulation algorithm to calculate the surface temperatures. Based on a parameter study, the coating thickness s and the thermal conductivity of the coating λ_c were identified as the main factors influencing the thermal tool load. The combined influence of these properties was described via the thermal resistance R. It could be shown that the average thermal load on the tool surface increases with increasing thermal resistance R.

• Periodical: Defect and Diffusion Forum (Volume 404)
• Pages: 53-60
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.404.53
• Online since: October 2020
• Authors: Bernd Breidenstein, Berend Denkena, Arnd Heckemeyer, Sascha Beblein*
• Keywords: Cutting, PVD-Coating, Simulation

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