Interpretation of PVD coated inserts wear phenomena in turning

摘要: Abstract PVD coatings attribute excellent cutting performance to cemented carbide inserts. Based on the continuous chip formation, experience distinct failure mechanisms in turning. To clarify influencing parameters coating wear resistance release, turning experiments with a TiAIN derived coating, deposited inserts, have been carried out. The experimental results are explained through analytical ones obtained by means of FEM calculations, indicating static decohesion at low speeds, owing its overstressing. At higher adhesion improvement was found out, whereas further speed increasing reveals dominant influence tribomechanical abrasive phenomena and release behavior. As overall length increases, progressive local decomposition occurs. Herewith formation alterations induced, such as gradual increase compression ratio consequent reduction tool contact stresses.