Steel sheet and formed part

Abstract

A steel sheet, in one example, a press-hardening steel sheet is provided. The steel sheet includes a substrate layer of steel and a corrosion protection layer. The corrosion protection layer is electrogalvanically applied to the substrate layer, which contains zinc and manganese with a component of at least 5% by weight.

1 . A press-hardening steel sheet, comprising:
 a steel substrate layer; and   a corrosion protection layer containing zinc and manganese,   wherein the corrosion protection layer is electrogalvanically applied to the substrate layer and has a manganese component of at least 5% by weight.   
     
     
         2 . The steel sheet according to  claim 1 , wherein the manganese component of the corrosion protection layer is at least 8% by weight. 
     
     
         3 . The steel sheet according to  claim 1 , wherein the manganese component of the corrosion protection layer maximally amounts to 25% by weight. 
     
     
         4 . A press-hardened formed steel part, comprising:
 a steel sheet including a steel substrate layer and a corrosion protection layer containing zinc and manganese, the corrosion protection layer being electrogalvanically applied to the substrate layer and having a manganese component of at least 5% by weight,   wherein the press-hardened formed steel part is formed through heating and forming with simultaneous cooling-down.   
     
     
         5 . The press-hardened formed steel part according to  claim 4 , wherein the corrosion protection layer includes a manganese-rich surface layer and a manganese-depleted substrate. 
     
     
         6 . A method for creating a formed steel part from a steel sheet, the method comprising the steps of
 heating the steel sheet to austenitization temperature;   forming the steel sheet with simultaneous cooling-down; and   removing a manganese-rich surface layer of the formed steel sheet.   
     
     
         7 . The steel sheet according to  claim 1 , wherein the manganese component of the corrosion protection layer is at least 15% by weight. 
     
     
         8 . The method of  claim 6 , wherein the steel sheet includes a steel substrate layer and a corrosion protection layer containing zinc and manganese. 
     
     
         9 . The method of  claim 8 , wherein the corrosion protection layer is electrogalvanically applied to the substrate layer and has a manganese component of at least 5% by weight. 
     
     
         10 . The method of  claim 8 , wherein the manganese component of the corrosion protection layer is at least 8% by weight. 
     
     
         11 . The method of  claim 8 , wherein the manganese component of the corrosion protection layer maximally amounts to 25% by weight.