Producing a product from a rolled strip material

Abstract

A product is produced from a rolled strip material with the steps: providing a substrate in form of a strip material from sheet steel, rolling of the substrate in form of strip material, electrolytic coating of the substrate with a first metal coating material, wherein the electrolytic coating is carried out after the rolling, applying of a second coating material as a scaling protection coating on the substrate coated with the first coating material, and hot-forming of the substrate, wherein the hot-forming is carried out after the application of the second coating material.

1 .- 12 . (canceled) 
     
     
         13 . A method for producing a product from a rolled strip material, comprising:
 providing a substrate in form of a strip material from sheet steel;   rolling the substrate to produce a rolled strip material;   performing an electrolytic coating of the substrate with a first metal coating material, wherein the electrolytic coating is carried out after the rolling;   applying a second coating material as a scaling protection coating on the substrate coated with the first coating material; and   hot-forming of the substrate, wherein the hot-forming is carried out after applying the second coating material;   wherein the second coating material is a compound with metallic components, wherein the composition of the second coating material is selected such that the metallic components include predominantly elements which are more ignoble than the sheet steel of the substrate, thereby providing a cathodic corrosion protection.   
     
     
         14 . The method of  claim 13 , wherein the composition of the second coating material is such that the metallic components have a proportion of metallic particles. 
     
     
         15 . The method of  claim 14 , wherein the proportion of metallic particles of the second coating material, in relation to a total of metallic components of the second coating material, is at least 5 percent of a total mass and not more than 95 percent of a total mass of the second coating material. 
     
     
         16 . The method of  claim 15 , wherein the composition of the second coating material is such that the proportion of metallic particles has particles of one or more of the carbide forming elements titanium, niobium and vanadium. 
     
     
         17 . The method of  claim 15 , wherein the composition of the second coating material is such that the proportion of metallic particles has particles of one or more of the ferrite forming elements chromium, aluminium, titanium, tantalum, molybdenum, vanadium and silicon. 
     
     
         18 . The method of  claim 15 , wherein the composition of the second coating material is such that the proportion of metallic particles has particles with a grain size of at least 100 nanometers and not more than 10 micrometers. 
     
     
         19 . The method of  claim 13 , wherein zinc is used as the first coating material. 
     
     
         20 . The method of  claim 13 , wherein, during the hot-forming, a ductile alloying layer is produced in a boundary portion of the substrate from the elements of the substrate of the first coating material and of the second coating material, wherein the ductile alloying layer has a higher ductility as compared to the substrate. 
     
     
         21 . The method of  claim 13 , wherein, during the hot-forming, an outer alloying layer is produced in a boundary portion between the first coating material and the second coating material from elements of the first coating material and of the second coating material. 
     
     
         22 . The method of  claim 21 , wherein the ductile alloying layer is produced from elements of the substrate and of the outer alloying layer. 
     
     
         23 . The method of  claim 13 , wherein rolling the substrate is carried out as a flexible rolling, wherein a variable thickness is produced along a length of the strip material. 
     
     
         24 . A product from a rolled strip material made of sheet steel with a coating from a first coating material and a second coating material, produced according to the steps of:
 providing a substrate in form of a strip material from sheet steel;   rolling the substrate to produce a rolled strip material;   performing an electrolytic coating of the substrate with a first metal coating material, wherein the electrolytic coating is carried out after the rolling;   applying a second coating material as a scaling protection coating on the substrate coated with the first coating material; and   hot-forming of the substrate, wherein the hot-forming is carried out after applying the second coating material;   wherein the second coating material is a compound with metallic components, wherein the composition of the second coating material is selected such that the metallic components include predominantly elements which are more ignoble than the sheet steel of the substrate, thereby providing a cathodic corrosion protection.