Oxygen-free copper alloy and method for its manufacture and use of copper alloy

Abstract

The invention relates to an oxygen-free copper alloy containing magnesium between 30-180 ppm, preferably 50-150 ppm in order to improve temperature resistance. The invention also relates to a method for the manufacture of the copper alloy and to the use of the copper alloy.

1 . An oxygen-free copper alloy comprising oxygen 1-10 ppm of the alloy weight, wherein the alloy comprises magnesium between 30-180 ppm of the alloy weight and the alloy has an electroconductivity of at least 100% International Anneal Copper Standard (IACS) in order to improve temperature resistance.  
   
   
       2 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy comprises at least 50 ppm of magnesium.  
   
   
       3 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy comprises at least 150 ppm of magnesium.  
   
   
       4 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy comprises at most 5 ppm oxygen.  
   
   
       5 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy has a half-softening temperature with a 40% degree of deformation of at least 340° C.  
   
   
       6 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy has a half-softening temperature with a 94% degree of deformation at least 300° C.  
   
   
       7 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy further comprising as impurities phosphorus, silicon and sulfur.  
   
   
       8 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy is used in commutators of electric motors where there is required a good temperature resistance and a good electroconductivity or thermal conductivity.  
   
   
       9 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy is used in a tip of a welding electrode where there is required a good temperature resistance and a good electroconductivity or thermal conductivity.  
   
   
       10 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy is used in generator profiles where there is required a good temperature resistance and a good electroconductivity or thermal conductivity.  
   
   
       11 . The oxygen-free copper alloy according to  claim 1 , wherein the alloy is used in generator flat bars where there is required a good temperature resistance and a good electroconductivity or thermal conductivity.  
   
   
       12 . The oxygen-free copper alloy according to  claim 1 , wherein the electroconductivity is at least 101% IACS.  
   
   
       13 . The oxygen-free copper alloy according to  claim 4 , wherein the alloy comprises 1-3 ppm oxygen.  
   
   
       14 . The oxygen-free copper alloy according to  claim 5 , wherein the half-softening temperature is at least 380° C.  
   
   
       15 . The oxygen-free copper alloy according to  claim 6 , wherein the half-softening temperature is at least 335° C.