Method of producing hot-rolled strip having a dual- phase structure

Abstract From the Canadian patent

Abstract of the Disclosure, The invention relates to a method of producing hotrolled strip having a dual-phase structure from a slab previously produced by ingot casting or continuous casting. The slab contains carbon manganese, silicon and chromium, as essential constituents in addition to iron. The slab is heated up to the rolling temperature hot-rolled at a, temperature above Ar3 rapidly cooled from the rolling, temperature and coiled at a relatively low temperature. The characterizing features of the invention are that the hot-rolled strip, a) is produced from a steel which in addition to 0.05, to 0.16% of C, 0.5 to 1.0% of Si 0.3 to 1.5% of Cr, ? 0.025% of P, ? 0.015% of S 0.02 to …