Effect of nitrogen and vanadium on austenite grain growth kinetics of a low alloy steel
- Faculty of Mathematics, Physics and Technics, Academy of Education, Cracow, ul. Pochorazych 2 (Poland)
- Faculty of Metallurgy and Materials Engineering, University of Mining and Metallurgy, Cracow, Al. Mickiewicza 30 (Poland)
Austenite grain growth kinetics in a steel containing 0.4% C, 1.8% Cr with different nitrogen contents (in the range 0.0038-0.0412%) and a micralloying addition of 0.078% V were investigated. The investigations were carried out in an austenitising temperature range of 840-1200 deg. C for 30 min. The results of investigations showed that N promotes the grain growth of austenite. The microalloying addition of vanadium protects the austenite grain growth because of carbonitride V(C,N) precipitation and the grain boundary pinning effect of undissolved particles of V(C,N). Using a thermodynamic model, the carbonitride V(C,N) content, undissolved at the austenitising temperature was calculated. At temperatures when a coarsening and dissolution of carbonitride occurs, the austenite grains start to growth. The effect of nitrogen on the type of chord length distribution of austenite grains was analysed.
- OSTI ID:
- 20889825
- Journal Information:
- Materials Characterization, Vol. 56, Issue 4-5; Conference: 9th ECSIA and 7th STERMAT: Stereology and image analysis in materials science, Zakopane (Poland), 10-13 May 2005; Other Information: DOI: 10.1016/j.matchar.2005.09.012; PII: S1044-5803(05)00209-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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