Investigation on Surface Integrity of Steel DIN 100Cr6 by Grinding Using CBN Tool

摘要

In many grinding processes and particularly in dry grinding,the residual stresses appears in form of tensile or compressive residual stresses.The knowledge of this resulting residual stress is very important for life cycle of the parts,because the residual stresses are directly superimposed with the operating stresses and loads.The grinding itself has a clear influence on the level of residual stresses in the component.With regard to the grinding process,grinding tools and material characterization,the amount and the type of the residual stresses are strongly dependent on the choice of grinding parameters.The thermal aspect of the grinding process(heat generation)tend to tensile residual stresses and mechanical aspects of the grinding process(material removal mechanism)reflect the compressive stress.In this work,the microstructure of work piece as well as residual stresses both in the feed direction of feed and perpendicular to the feed direction are investigated.The investigation shows that the residual stresses not only depends on the grinding parameter and material removal rate but also depends on topography of the wheel for instant by structuring.With proper structuring,it is possible to decrease the tensile residual stress or eliminate it even by dry grinding.