Cu alloy material, method of manufacturing Cu alloy conductor using the same, Cu alloy conductor obtained by the method, and cable or trolley wire using the Cu alloy conductor

Abstract

A method of manufacturing a Cu alloy conductor comprises the steps of: adding and dissolving In of 0.1-0.7 weight % to a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm) to form a molten Cu alloy, performing a continuous casting with the molten Cu alloy, rapidly quenching a casting material to a temperature by at least 15° C. or more lower than a melting point of molten Cu alloy, controlling the casting material at a temperature equal to or lower than 900° C., and performing a plurality of hot rolling processes to the casting material such that a temperature of a final hot rolling is within a range of from 500 to 600° C. to form the rolled material.

1 . a Cu alloy material, comprising: 
 a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm), Sn of 0.1-0.4 weight %, and at least a kind of an additive element of 0.01-0.7 weight % having a larger affinity with oxygen than the Sn, wherein a ratio of a sum of the Sn and the additive element is 0.3-0.8 weight %.    
     
     
         2 . The Cu alloy material according to  claim 1 , wherein: 
 the additive element comprises at least a kind of an element to be selected out of Ca, Mg, Li, Al, Ti, Si, V, Mn, Zn, In or Ag, or a compound thereof.    
     
     
         3 . The Cu alloy material according to  claim 1 , wherein: 
 the Cu matrix, besides the Sn and the additive element, contains P or B equal to or less than 0.01 weight % (100 weight ppm).    
     
     
         4 . The Cu alloy material according to  claim 1 , wherein: 
 the Cu matrix, besides the Sn and the additive element, contains a sum of P and B equal to or less than 0.02 weight % (200 weight ppm).    
     
     
         5 . A method of manufacturing a Cu alloy conductor with use of a rolled material formed in a continuous casting and rolling process by using a molten Cu alloy, comprises the steps of: 
 adding and dissolving Sn of 0.1-0.4 weight %, at least a kind of an additive element of 0.01-0.7 weight % having a larger affinity with oxygen than Sn, and a sum of the Sn and the additive element of 0.3-0.8 weight %, to a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm) to form the molten Cu alloy;    performing a continuous casting with the molten Cu alloy, as well as rapidly quenching a casting material to a temperature at least 15° C. lower than a melting point of the molten Cu alloy;    controlling the casting material at a temperature equal to or lower than 900° C.; and    performing a plurality of hot rolling processes to the casting material such that a temperature of a final hot rolling is within a range of from 500 to 600° C. to form the rolled material.    
     
     
         6 . The method of manufacturing a Cu alloy conductor according to  claim 5 , wherein: 
 the Cu alloy conductor is formed by performing a cold work to the rolled material at a temperature within a range of from −193 to 100° C. at a degree of the processing equal to or more than 50%.    
     
     
         7 . A Cu alloy conductor, comprising: 
 a Cu alloy material, comprising:    a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm), Sn of 0.1-0.4 weight %, and at least a kind of an additive element of 0.01-0.7 weight % having a larger affinity with oxygen than the Sn, wherein a ratio of a sum of the Sn and the additive element is 0.3-0.8 weight %, wherein:    an average particle diameter of crystal particles forming a crystal structure is equal to or less than 100 μm; and    80% or more of oxides of an element having the largest affinity with oxygen out of the additive elements is dispersed in a crystal structure matrix as micro oxides an average particle diameter of which is equal to or 1 μm.    
     
     
         8 . The Cu alloy conductor according to  claim 7 , wherein: 
 the tension strength is equal to or more than 420 MPa; and    the electric conductivity is equal to or more than 60% IACS.    
     
     
         9 . A cable, comprising: 
 an insulating layer disposed around a single-track material or a twisted wire material made of the Cu alloy conductor according to  claim 7 .    
     
     
         10 . A Cu alloy material, comprising: 
 a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm), wherein:    In of 0.1-0.7 weight % is contained.    
     
     
         11 . The Cu alloy material according to  claim 10 , wherein: 
 in addition to the In, P or B of equal to or less than 0.01 weight % (100 weight ppm) is contained.    
     
     
         12 . The Cu alloy material according to  claim 10 , wherein: 
 in addition to the In, a sum of P and B of equal to or less than 0.02 weight % (200 weight ppm) is contained.    
     
     
         13 . A method of manufacturing a Cu alloy conductor with use of a rolled material formed in a continuous casting and rolling process by using a molten Cu alloy, comprising the steps of: 
 adding and dissolving In of 0.1-0.7 weight % to a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm) to form the molten Cu alloy;    performing a continuous casting with the molten Cu alloy, as well as rapidly quenching a casting material to a temperature at least 15° C. lower than a melting point of the molten Cu alloy;    controlling the casting material at a temperature equal to or lower than 900° C.,and    performing a plurality of hot rolling processes to the casting material such that the temperature of a final hot rolling is within a range from 500 to 600° C., to form the rolled material.    
     
     
         14 . The method of manufacturing the Cu alloy conductor according to  claim 13 , wherein: 
 performing a cold work to the rolled material at a temperature of from −193 to 100° C. in a degree of processing equal to or more than 50% to form the Cu alloy conductor.    
     
     
         15 . A Cu alloy conductor, comprising: 
 a Cu alloy material including In of 0.1-0.7 weight % in a Cu matrix containing oxygen of 0.001-0.1 weight % (10-1000 weight ppm), wherein:    an average particle diameter of crystal particles forming a crystal structure is equal to or less than 100 μm; and    80% or more of oxides of the In is dispersed in a crystal structure matrix as micro oxides an average particle diameter of which is equal to or less than 1 μm.    
     
     
         16 . The Cu alloy conductor according to  claim 15 , wherein: 
 the tensile strength is equal to or more than 420 MPa; and    the conductivity is equal to or more than 60% IACS.    
     
     
         17 . The Cu alloy conductor according to  claim 15 , wherein: 
 the tensile strength is equal to or more than 420 MPa; and    the conductivity is equal to or more than 75% IACS.    
     
     
         18 . A cable, comprising: 
 an insulating layer disposed around a single-track material or a twisted wire material made of the Cu alloy conductor according to  claim 15 .    
     
     
         19 . A trolley wire, comprising: 
 the Cu alloy conductor according to  claim 15.