Entwicklung nichtrostender Waelzlager fuer hohe Betriebstemperaturen und Drehzahlen. Teilvorhaben: Verfahrensentwicklung Abschlussbericht

Highly nitrided martensitic steels combine excellent corrosion stability with high fatigue resistance and are best suited as a rolling bearing material in aircrafts. The process development comprises nitriding of newly developed chromium containing martensitic steels at temperatures above A_3 with subsequent direct hardening for generation of the martensitic structure. The derivation of treatment parameters was assisted by a computer program for calculation of the nitrogen solubility as a function of temperature, pressure and alloy composition. For characterization of the nitriding efficiency, nitrogen concentration profiles were followed as a function of time of nitriding and described by diffusion kinetics. As alternatives to the direct hardening the application of double hardening and martempering has been studied. (WEN)Available from TIB Hannover: F96B351+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman