Vanadium Microalloyed Steel for Thin Slab Casting and Direct Rolling
Vanadium microalloyed steels (V-steels) with high yield strength (～600MPa), good toughness, ductility and formability have been successfully produced in commercial thin slab casting plants employing direct rolling after casting.Because of the high solubility of vanadium carbonitrides, vanadium is likely to remain in solution during casting,equalisation and rolling. Almost all of the vanadium present in the steel is available to precipitate in ferrite as very fine (～5 nm) and stable particles, resulting in substantial dispersion strengthening. Despite a coarse as-cast grain size (～1 mm),significant grain refinement can be achieved by repeated recrystallisation during hot rolling. Consequently, a fine (～4μm) and uniform ferrite grain structure is produced in the final strip. Increasing the vanadium or nitrogen content in the steels increases dispersion strengthening which occurs together with a finer ferrite grain size. Equalisation and coiling temperatures have minimal effects on the properties of V-Steels.
vanadium nitrogen titanium microalloyed steel thin slab casting and direct rolling
Yu Li David Milbourn
Vanitec, Winterton House, High Street, Westerham, Kent, TN16 1NP, UK
国际会议
2009年薄板坯连铸连轧国际研讨会(TSCR 2009)(2009 International Symposium on Thin Slab Casting and Rolling)
南京
英文
400-406
2009-05-13（万方平台首次上网日期，不代表论文的发表时间）