Method for producing a formed component from a steel blank, use of such a component, and corresponding blank and component

Abstract

A method for producing a component from a blank made of a medium manganese steel having 4 to 12 wt. % Mn and a TRIP effect at room temperature, in which method the blank is mechanically cut to make a prepared blank having the desired dimensions, cut edges are produced on the prepared blank by means of mechanical cutting, and the prepared blank with the cut edges is cold-formed to obtain the component at room temperature or at a temperature above room temperature but below 60° C. The method is distinguished by cost-effective production, improved formability with reduced cracking at the formed cut edges, while simultaneously reducing the forming forces. The mechanical cutting is performed at a pre-heating temperature in the range of 60° C. to less than 250° C.

1 . A method for producing a component from a plate comprising a medium manganese-containing steel with 4 to 12 wt. % Mn and with a TRIP effect at room temperature, wherein the method comprises:
 mechanically separating the plate to form a prepared plate with desired dimensions, and wherein separation edges are produced on the prepared plate by said mechanically separating the plate; and   cold forming the prepared plate with the separation edges to form the component at room temperature or at a temperature above room temperature and below 60° C.;   wherein said mechanically separating the plate is effected at a preheating temperature in the range of 60° C. to less than 250° C.   
     
     
         2 . The method as claimed in  claim 1 , wherein the steel is a medium manganese-containing steel, with more than 5 to less than 10 wt. % Mn. 
     
     
         3 . The method as claimed in  claim 1 , wherein the plate is heated locally to the preheating temperature only in regions of the separation edges to be produced by said mechanically separating. 
     
     
         4 . The method as claimed in  claim 1 , wherein the preheating temperature is 100 to 200° C. 
     
     
         5 . The method as claimed in  claim 1 , wherein the separation edges are heated to the preheating temperature in a heating device arranged in a cutting or punching tool. 
     
     
         6 . The method as claimed in  claim 1 , wherein the separation edges are heated to the preheating temperature in a separate heating device. 
     
     
         7 . The method as claimed in  claim 5 , wherein the separation edges are heated inductively, conductively or via radiant heat. 
     
     
         8 . Use of a component produced according to  claim 1  in at least one of automobile construction, rail vehicle construction, shipbuilding, plant construction, infrastructure construction, mining, the aerospace industry, and household appliance technology. 
     
     
         9 . A prepared plate for producing a component by cold forming the prepared plate at room temperature, said prepared plate comprising:
 at least one separation edge of a mechanical separation from an original plate comprising a medium manganese-containing steel with 4 to 12 wt. % Mn and with a TRIP effect at room temperature;   wherein the at least one separation edge determines or at least co-determines the dimensions of the prepared plate, and wherein TWIP effect-induced deformation twins are present in the microstructure at the separation edge.   
     
     
         10 . A component comprising a plate of a steel with a TRIP effect at room temperature, wherein the plate is a prepared plate as claimed in  claim 9 . 
     
     
         11 . The component as claimed in  claim 10 , produced by:
 mechanically separating the plate to form a prepared plate with desired dimensions, and wherein separation edges are produced on the prepared plate by said mechanically separating the plate; and   cold forming the prepared plate with the separation edges to form the component at room temperature or at a temperature above room temperature and below 60° C.;   wherein said mechanically separating the plate is effected at a preheating temperature in the range of 60° C. to less than 250° C.   
     
     
         12 . The component as claimed in  claim 10 , wherein the component is a component for at least one of automobile construction, rail vehicle construction, shipbuilding, plant construction, infrastructure construction, mining, the aerospace industry, and household appliance technology. 
     
     
         13 . The method as claimed in  claim 6 , wherein the separation edges are heated inductively, conductively or via radiant heat. 
     
     
         14 . The method as claimed in  claim 3 , wherein the separation edges are heated to the preheating temperature. 
     
     
         15 . The method as claimed in  claim 14 , wherein the separation edges are heated inductively, conductively or via radiant heat. 
     
     
         16 . The method as claimed in  14 , wherein the separation edges are heated to the preheating temperature in a heating device arranged in a cutting or punching tool, or the separation edges are heated to the preheating temperature in a separate heating device.