Pulvermetallurgie hochgestickter Staehle Abschlussbericht

New stainless high nitrogen steels from the powder metallurgical process are characterized by high wear and corrosion resistance at combined strength and fracture toughness. A new method for the preparation of such steels includes the smelting of prealloys in vacuum induction furnaces under argon to yield the brittle sigma phase, grinding of the cooled material to a powder of < 300 #mu#m particle size, nitrogen treatment of the powder at 500-900 C and subsequent optimization of the mechanical properties by a finishing treatment. High nitrogen austenitic steels can be used for substitution of Co and Ni containing steel, while high nitrogen martensitic steels exhibit enhanced corrosion and wear resistance. Cylindrical steel components with improved crack stop properties can be obtained by the described laminate technique. (WEN)Carried out in cooperation with ABB PowdermetAvailable from TIB Hannover: F96B99+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman