Patent ID: 6773514
Filing Date: 2004-08-10
Classification: C21D

Abstract:
A method for producing non grain-oriented magnetic steel sheet comprising:producing a hot strip from an input stock in form of cast slabs, strip, roughed strip, or thin slabs, said input stock being made of steel comprising in weight %: C:0.001-0.05% Si: &lE;1.5% Al: &lE;0.4% with Si+2 Al&lE;1.7% optionally up to a total of 1.5% alloying additions selected from the group consisting of P, Sn, Sb, Zr, V, Ti, N, Ni, Co, Nb and B; balance iron and inevitable impurities wherein the input stock is hot rolled to form a hot strip directly from the casting heat or after preceding reheating to a reheating temperature between minimum 1000Â° C. and maximum 1180Â° C. in several deformation passes; and subsequently coiling said hot strip in a coil at a coiling temperature; wherein at least the first deformation pass during the hot-rolling step is carried out in a austenitic region, and at least one further deformation pass is carried out in a two phase austenite/ferrite region, and wherein a total deformation &egr;h of at least 35% is achieved during the hot-rolling step in the two phase austenite/ferrite region.