Influence of machining conditions on the magnitude and characteristics of the white layer in high-speed machining

The white layer generated on a machined surface represents a surface defect Therefore it is essential to determine the factors influencing its generation and its characteristics. There is the lack of knowledge, which tends to present the influence of the white layer on the surface integrity and performance of the machined part as a function of machining conditions. The results of this research work provide a basis for determination of the optimal range of cutting speeds and feed rates in high-speed milling of hardened steel in order to ensure a minimal negative influence of the white layer on the workpiece quality and machined surface integrity.