Entwicklung, Optimierung und Erprobung von Werkzeugbeschichtungen fuer trockene und schmiermittelarme Fertigung. Teilvorhaben: Praktische Anwendung in der Kaltmassivumformung Abschlussbericht

Hard tool coatings developed in the frame of a joint project by TiC/TiN-CVD/, TiC/Ti(C,N)-CVD-, TiN-PVD- and CrN-PVD-coating were tested in the manufacturing process of two selected screw components from wires: The tapering process was studied with M16 hex bolts and the full-forward extrusion was studied with M10 hammer-head screws. Results obtained in the cold forming confirm the fact that metallic clean surfaces can be formed by means of the coated tools. Thus any wire precoating with zinc phosphate can be omitted. Arbors and punches used as tools and lubricated only with cold moulding oils are working at reasonable life cycles. (WEN)SIGLEAvailable from TIB Hannover: F97B778+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Reduzierung der Umweltbelastung in der Kaltmassivumformung von Stahl durch Vermeidung von Phosphatierungen bei minimiertem Schmierstoffeinsatz Abschlussbericht

Available from TIB Hannover: F02B100 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDeutsche Bundesstiftung Umwelt, Osnabrueck (Germany)DEGerman