Metallurgical Analysis of Chip Forming Process when Machining High Strength Bainitic Steels

摘要

In the following work, we propose a metallurgical approach to the chip formation process.We focus on a turning application of high strength steel in which chips are produced by adiabaticshear bands that generate cutting force signals with high frequency components. A spectral analysisof these signals is applied and highlights peaks above 4 kHz depending on the cutting conditions.A microscopic analysis on the chip sections provided data on chip breaking and serration mechanisms.Shear band spacing and excitation frequency of the whole cutting system were calculated and gave agood correlation with cutting forces spectra.