Method for the production of drop forge parts containing ti, zr, hf

Abstract

The invention relates to a method for the production of drop forge parts essentially comprising titanium, zirconium, hafnium or a corresponding alloy, enabling rigidity thereof to be increased.

1 - 10 . (canceled)  
     
     
         11 . A process for production of a drop forged part made of a metal alloy containing 80 wt. % or more Ti and/or Zr and/or Hf, wherein the drop forged part during deforming is heated 5-15 K above the α/β phase boundary to form β phases and is subsequently cooled.  
     
     
         12 . A process according to  claim 11 , wherein said drop forged part is a moving part of a motor.  
     
     
         13 . A process according to  claim 11 , wherein said drop forged part is a connecting rod, crankshaft, camshaft or a valve.  
     
     
         14 . A process according to  claim 11 , wherein the material is heated for 20-60 minutes.  
     
     
         15 . A process according to  claim 11 , wherein the relaxation thermal treatment occurs at 600-700° C. after cooling.  
     
     
         16 . A process according to  claim 11 , wherein the E-modulus and the rigidity of the Ti and/or Zr and/or Hf containing materials, or alloys thereof, are increased.  
     
     
         17 . A process according to  claim 11 , wherein the alloy is a titanium alloy containing 1-20 wt. % Zr and/or Hf and optionally incidental amounts of other light or heavy metals.  
     
     
         18 . A process according to  claim 11 , wherein the alloy is a titanium alloy containing 5-15 wt. % Zr and/or Hf and optionally incidental amounts of other light or heavy metals.  
     
     
         19 . A process according to  claim 11 , wherein the alloy is a titanium alloy containing 90 wt. % titanium.  
     
     
         20 . A process according to  claim 11 , wherein the alloy is a titanium alloy selected from Ti Al 6 V 4 and Ti Al 6 Fe2 Si.  
     
     
         21 . A process according to  claim 11 , wherein an α/β micro structure or composite material is formed.  
     
     
         22 . A process according to  claim 11 , wherein the drop forge part after forging is slowly cooled in air.  
     
     
         23 . A drop forged part made of a metal alloy containing 80 wt. % or more Ti and/or Zr and/or Hf, made by a process comprising: 
 heating, during deforming, 5-15 K above the α/β phase boundary to form β phases; and    subsequently cooling.    
     
     
         24 . A drop forged part as in  claim 23 , wherein said part is a connecting rod, a crankshaft, a camshaft or a valve part.  
     
     
         25 . A drop forged part made of a metal alloy containing 80 wt. % or more Ti and/or Zr and/or Hf, made by a process comprising: 
 heating, during deforming, 5-15 K above the α/β phase boundary to form β phases; and    subsequently cooling in such a manner that the E-modulus is increased.