Method for machining a workpiece made of a metallic material

Abstract

A method for machining a workpiece made of a metallic material, in which the workpiece is machined by ECAP, characterized in that after the machining by ECAP, the workpiece is post-processed by hammering, thus achieving a diameter reduction. As a result, material properties of the material of the workpiece and in particular the strength and the hardness may be significantly increased.

1 . A method for machining a workpiece made of a metallic material, in which the workpiece is machined by ECAP, characterized in that after the machining by ECAP, the workpiece is post-processed by hammering, thus achieving a diameter reduction. 
     
     
         2 . The method according to  claim 1 , characterized in that the forming of the workpiece by hammering takes place in multiple steps, each forming operation having a degree of deformation of 0.05 to 2, preferably 0.1 to 0.5, and particularly preferably 0.15 to 0.3. 
     
     
         3 . The method according to  claim 1 , characterized in that the forming of the workpiece by hammering takes place at a temperature of 10° C. to 600° C., preferably 12° C. to 380° C., particularly preferably 14° C. to 250° C. 
     
     
         4 . The method according to  claim 1 , characterized in that the metallic material includes titanium and/or magnesium. 
     
     
         5 . The method according to  claim 1 , characterized in that the metallic material includes zirconium, in a mass fraction of approximately 10% to approximately 20%. 
     
     
         6 . The method according to  claim 1 , characterized in that the temperature of the workpiece during the machining by ECAP is at least 200° C., at least 350° C., at least 450° C., or at least 500° C. 
     
     
         7 . The method according to  claim 1 , characterized in that the machining by ECAP includes at least four machining passes. 
     
     
         8 . The method according to  claim 1 , characterized in that the workpiece is additionally pressure-formed before or after or both before and after the machining by ECAP. 
     
     
         9 . The method according to  claim 1 , characterized in that the workpiece is additionally heat-treated. 
     
     
         10 . The method according to  claim 1 , characterized by the manufacture of a workpiece having a length ≥500 mm or ≥1000 mm or ≥2000 mm. 
     
     
         11 . The method according to  claim 1 , wherein the workpiece is a blank. 
     
     
         12 . The method according to  claim 1 , wherein the workpiece is a medical implant. 
     
     
         13 . The method according to  claim 12 , wherein the medical implant is a dental implant. 
     
     
         14 . The method according to  claim 12  wherein the medical implant is in the form of a screw, a plate, a nail, a wire, a pin, a foil, a scaffold, or a stent.