Vanadium Microalloyed Steel for Thin Slab Casting and Direct Rolling

Yu Li; T.N. Baker

doi:10.4028/www.scientific.net/MSF.500-501.237

Paper Titles

Application of Deformation to Improve Hot Ductility in the Peritectic Steel
p.203

Problems Associated with Modeling Interpass Softening during Industrial Hot Strip Rolling
p.211

Modeling of the Microstructural Evolution and Mean Flow Stress during Thin Slab Casting/Direct Rolling of Niobium Microalloyed Steels
p.221

The Microstructure Evolution of Nb, Ti Complex Microalloyed Steel during the CSP Process
p.229

Vanadium Microalloyed Steel for Thin Slab Casting and Direct Rolling
p.237

Optimization of Rolling Conditions in Nb Microalloyed Steel Processed by Thin Slab Casting and Direct Rolling Route: Processing Maps
p.245

Processing of Niobium Microalloyed API Grade Steel on a Thin Slab Plant
p.253

Development of X60/X70 Line Pipe Steels through EAF-Thin Slab Casting Technology at Ezz Flat Steel, Ain Sukhna, Egypt
p.261

The Development of Vanadium Containing Steels Suitable for Thin Slab Casting
p.269

HomeMaterials Science ForumMaterials Science Forum Vols. 500-501Vanadium Microalloyed Steel for Thin Slab Casting...

Vanadium Microalloyed Steel for Thin Slab Casting and Direct Rolling

Abstract:

Vanadium microalloyed steels with high yield strength (»600MPa), good toughness and ductility have been successfully produced in commercial thin slab casting plants employing direct rolling after casting. Because of the high solubility of VN and VC, most of the vanadium is likely to remain in solution during casting, equalisation and rolling. While some vanadium is precipitated in austenite as cuboids and pins the grain boundaries, a major fraction is available for dispersion strengthening of ferrite. Despite a coarse as-cast grain size, significant grain refinement can be achieved by repeated recrystallisation during hot rolling. Consequently, a fine and uniform ferrite grain structure is produced in the final strip. Increasing the V and N levels increases dispersion strengthening which occurs together with a finer ferrite grain size. The addition of titanium to a vanadium containing steel, decreases the yield strength due to the formation of V-Ti(N) particles in austenite during both casting and equalisation. These large particles reduced the amount of V and N available for subsequent precipitation of fine (~5nm) V rich dispersion strengthening particles in ferrite.

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Periodical:

Materials Science Forum (Volumes 500-501)

Pages:

237-244

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.500-501.237

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Online since:

November 2005

Authors:

Yu Li, T.N. Baker

Keywords:

Direct Rolling, Microalloyed Steel, Nitrogen, Thin Slab Casting, Titanium (Ti), Vanadium

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