Method for manufacturing a composite wire

Abstract

One aspect relates to a method for manufacturing a composite wire, including providing a first part in form of a rod, providing a second part in form of a tube surrounding the rod at least partially to form a rod-tube assembly, providing a clad part in form of a cylinder surrounding the rod-tube assembly at least partially to form a cladded rod-tube assembly, and extruding the cladded rod-tube assembly to form the composite wire. The second part includes an alloy comprising the following alloy components: a) Cr in the range from about 10 to about 30 wt. %; b) Ni in the range from about 20 to about 50 wt. %; c) Mo in the range from about 2 to about 20 wt. %; d) Co in the range from about 10 to about 50 wt. %; wherein the Al content of the alloy is less than about 0.01 wt. %; wherein each wt. % is based on the total weight of the alloy.

What is claimed is: 
     
         1 . A method for manufacturing a composite wire comprising:
 providing a first part in form of a rod,   providing a second part in form of a tube surrounding the rod at least partially to form a rod-tube assembly,   providing a clad part in form of a cylinder surrounding the rod-tube assembly at least partially to form a cladded rod-tube assembly,   extruding the cladded rod-tube assembly to form the composite wire   
       wherein the first part or the second part comprises an alloy comprising the following alloy components:
 a) Cr in the range from about 10 to about 30 wt. %; 
 b) Ni in the range from about 20 to about 50 wt. %; 
 c) Mo in the range from about 2 to about 20 wt. %; 
 d) Co in the range from about 10 to about 50 wt. %; 
 
       wherein the Al content of the alloy is less than about 0.01 wt. %; 
       wherein each wt. % is based on the total weight of the alloy. 
     
     
         2 . The method according to  claim 1 , wherein the Cr, Ni, Mo and Co components are major constituents of the first part or the second part with at least about 95 wt. % of the alloy being Cr, Ni, Mo and Co. 
     
     
         3 . The method according to  claim 1 , wherein the second part comprises the Cr, Ni, Mo and Co alloy. 
     
     
         4 . The method according to  claim 1 , wherein the first part comprises a metallic material. 
     
     
         5 . The method according to  claim 1 , wherein the first part comprises at least one of a group of Silver, Platinum, Tantalum, Gold, Copper and alloys thereof. 
     
     
         6 . The method according to  claim 1 , wherein the clad part comprises a material with a lower friction coefficient than the second part. 
     
     
         7 . The method according to  claim 1 , further comprising a heating of the cladded rod-tube assembly before the extrusion step. 
     
     
         8 . The method according to  claim 1 , further comprising an applying of vacuum of the cladded rod-tube assembly before the extrusion step. 
     
     
         9 . The method according to  claim 1 , further comprising a removing of the clad part after the extrusion step. 
     
     
         10 . The method according to  claim 9 , wherein the removing of the clad part is an etching-off. 
     
     
         11 . The method according to  claim 1 , further comprising a wire drawing of the composite wire after the extrusion step. 
     
     
         12 . The method according to  claim 1 , further comprising a deforming of the composite wire into a coil. 
     
     
         13 . The method according to  claim 1 , further comprising an annealing of the composite wire after the etching-off step. 
     
     
         14 . A composite wire manufactured by a method of  claim 1 . 
     
     
         15 . A medical device comprising a composite wire of  claim 1  as a lead.