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- Title
Effect of V and N Precipitation on Acicular Ferrite Formation in Sulfur-Lean Vanadium Steels.
- Authors
Capdevila, C.; García-Mateo, C.; Chao, J.; Caballero, F.G.
- Abstract
This article deals with the mechanical properties achieved in two S-lean laboratory-cast V steels with two different N content levels, as compared with commercial acicular ferrite steel. The designed heat treatments ensure an almost homogeneous microstructure consisting of acicular ferrite for N-rich and commercial steels and consisting of bainite for the N-lean steel. The results presented in this work demonstrate that, in the absence of sulfide inclusions, acicular ferrite is nucleated on V(C,N) precipitates. The mechanical tests indicate that N-rich acicular ferrite steel achieves the same toughness values as N-lean bainitic steel but with a substantial improvement in strength properties. The S-lean steels present better toughness properties than commercial acicular ferrite steel, which is consistent with the detrimental effect of inclusions on toughness.
- Subjects
PRECIPITATION (Chemistry); FERRITES; SULFUR; VANADIUM steel; HEAT treatment of steel; MICROSTRUCTURE; NUCLEATION
- Publication
Metallurgical & Materials Transactions. Part A, 2009, Vol 40, Issue 3, p522
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-008-9730-z