Entwicklung beschichteter Cermets. Teilprojekt: Untersuchung der Verschleissphaenomene und Verschleissursachen beim Zerspanen mit beschichteten Cermet-Schneidstoffen Abschlussbericht

The wear behaviour of metal cutting tools fitted with coated cermets has been studied in turning and milling of steel for hardening and tempering (42 CrMo S 4 V), rustless steel (X5 CrNi 18-10) and the cast material GGG70. As coatings TiN, (Ti, Al)N, TiN-Al_2O_3-TiN multilayers, TiCN-based multilayers and diamond, and as the coating processes PVD, CVD and PCVD were applied. With all studied coatings the wear resistance has been essentially improved. At application of PVD the (Ti, Al)N layers achieved highest tool life cycles. In addition, the high potentials of novel PVD layer systems on the basis of zirconium and niobium have been demonstrated. Under the PCVD and CVD multilayer systems especially the Al_2O_3-containing systems were found to be highly wear resistant. The optimum of the layer thickness depends on the applied cutting process. For turning with smooth cuts a thickness of the coating layer of >10 #mu#m is required. (WEN)SIGLEAvailable from TIB Hannover: F97B744+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman