Patent ID: 6613163
Filing Date: 2003-09-02
Classification: C21D,C22C,C23C,Y10T

Abstract:
A procedure for producing a steel band designed for the manufacture of parts fabricated by a deep-drawing or a drawing and ironing process, wherethe steel band is hot rolled, and at least one side of the band is coated with at least one of: a galvanic layer containing at least one metal selected from a group consisting of Ni, Co, Cu, Fe, Sn, In, Pd, Bi and the alloys thereof, or, with a roll bonded layer containing at least one metal from a group consisting of Cu, brass and alloys of copper and brass, wherein the procedure steps after the hot rolling include at least the steps of: pickling, cold rolling in one or two steps with a cold rolling coefficient of at least 86%, and coil annealing of the band, wherein the coating is applied in the case of a galvanic coating upon the band after the cold-rolling or, respectively, in the case of roll bonding, during the cold rolling, but, in any case, before annealing, wherein the hot band contains between 00013 and 0.0060 weight per cent of boron, and wherein the weight ratio of boron to nitrogen is 0.5 to 2.5.