钒：改造未来

Effect of V and N on Processing and Properties of HSLA Strip Steels Produced by Thin Slab Casting

Abstract:

Vanadium has proven to be a popular choice as a microalloy for strip steels produced by the thin slab cast direct charging process. Primary reasons for the compatibility of vanadium with thin slab casting are as follows:
• Vanadium utilizes nitrogen as part of the alloy system. Nitrogen levels common to EAF steelmakingprocesses often associated with thin slab casting can be used to improve alloy cost effectiveness.
• Castability problems are minimized with vanadium compared to some other microalloy approaches.
• Higher solubility of the V(C,N) precipitates permit higher alloy levels in the steel even when restricted to the low reheat temperatures available in the tunnel equalization furnaces.
• Recrystallization control rolling techniques produce refined austenitic grains at normal carbon steel rolling temperatures.
• Precipitation occurs primarily during or after transformation to ferrite, thereby not contributing to roll forces during finish rolling.
• Reasonable coiling temperatures (580-620 °C) are compatible with normal mill equipment

Keywords:

HSLA, Vanadium, Nitrogen, Thin Slab Cast Strip, Strain Aging