SG-AC Rolls

Acicular Rolls are mostly convenient far intermediate and finishing stands due ta its tougher structure.While rolling speed getting increase towards finishing stands, the surface of rolled material gains its final shape on prefinishing and finishing stands.Today, rebar and especially wire milis are using Acicular Roll qualities to give better surface ta rolled material unless they use composite tougher rolls.

Acicular ferrite is alsa characterised by high angle boundaries between the ferrite grains.This further re-duces the chance of cleavage, because these boundaries impede crack propagation. it is reported that nucleation of various ferrite morphologies is aided by nonmetal-lic inclusion; in particular oxygen-rich inclusions ofa certain type and size are associated with the intragran­ ular formation of acicular ferrite.Acicular ferrite is a fine Widmanstatten constituent, which is nucleated by an optimum intragranular dispersion of oxide/sulfide/ silicate particles.