Tempering of Martensitic Stainless Steel with 0.6 w/o Nitogen and /or Carbon

H. Berns; V. Gavriljuk

doi:doi:10.1051/jp4:1997541

Accès gratuit

Numéro		J. Phys. IV France Volume 07, Numéro C5, November 1997 IV^th European Symposium on Martensitic Transformations


Page(s)		C5-263 - C5-268
DOI		https://doi.org/10.1051/jp4:1997541

IV^th European Symposium on Martensitic Transformations

J. Phys. IV France 07 (1997) C5-263-C5-268
DOI: 10.1051/jp4:1997541

Tempering of Martensitic Stainless Steel with 0.6 w/o Nitogen and /or Carbon

H. Berns¹ and V. Gavriljuk²

¹ Ruhr-Universität Bochum, Institute for Materials, Universitätsstr. 150, 44780 Bochum, Germany
² Institute of Meta1 Physics, 35 acad. Vernadsky Blvd, 252142 Kiev, Ukraine

Abstract
Martensitic stainless high nitrogen steels are used for advanced bearings because of their superior corrosion resistance and hot hardness. Therefore the tempering behaviour of steels SC, SN and SNC with close to 15 w/o Cr, 1 w/o Mo and 0.6 w/o C, N or C+N, respectively, was investigated. Secondary hardening is enhanced by nitrogen, which also increase the content of retained austenite and its resistance to tempering especially in SNC. During tempering [MATH], [MATH] and M₇C₃-carbides precipitate in SC while [MATH], [MATH] and M₂N-nitrides appear in SN. In SNC carbides and nitrides precipitate separately. Mössbauer spedroskopy revealed clustering of solute atoms in SC and ordering in SN and more so in SNC.