Titanium copper alloy having excellent punchability

Abstract

A copper material alloy comprising 2.0 to 4.0 weight % of Ti and 0.05 to 0.50 weight % of Fe wherein; inevitable impurities have an amount of 0.01 weight % or less in total; and the ratio of X ray diffraction intensity of the alloy satisfies I(311)/I(111)≧0.5. The copper alloy of the present invention has improved punchability and excellent bendability.

1 . A titanium copper alloy consisting of 2.0 to 4.0 mass % of Ti, 0.05 to 0.50 mass % of Fe and the balance of Cu and impurities and having excellent punchability characterized in that; 
 it comprises 0.01 mass % or less in total of inevitable impurities; and the ratio of X ray diffraction intensity of the alloy satisfies I(311)/I(111)≧0.5.    
     
     
         2 . The titanium copper alloy having excellent punchability according to  claim 1 , wherein; 
 the number of Cu—Ti—Fe type composition particles in the second phase particles having an area of 0.01 μm 2  or more measured by a cross sectional observation is 50% or more.    
     
     
         3 . The titanium copper alloy having excellent punchability according to  claim 1 , wherein; 
 the average particle size of the second phase having an area of 0.01 μm 2  or more measured by a cross sectional observation is 2.0 μm or less.    
     
     
         4 . The titanium copper alloy having excellent punchability according to  claim 1 , wherein; 
 the coefficient of variation Cv (standard deviation/mean value) of the density of the second phase particles having an area of 0.01 μm 2  or more, observed in each crystal grains by means of a cross sectional observation, is 0.3 or less.    
     
     
         5 . A titanium copper alloy consisting of 2.0 to 4.0 mass % of Ti, 0.05 to 0.50 mass % in total of Fe and at least one selected from a group consisting of Co, Ni, Si, Cr, V, Nb, Zr, B and P, and the balance of Cu and impurities and having excellent punchability characterized in that; 
 it comprises 0.01 mass % or less in total of inevitable impurities; and the ratio of X ray diffraction intensity of the alloy satisfies I(311)/I(111)≧0.5.    
     
     
         6 . The titanium copper alloy having excellent punchability according to  claim 5 , wherein; 
 the number of Cu—Ti—X type composition particles (wherein X is an element selected from Fe, Co, Ni, Si, Cr, V, Nb, Zr, B and P) in the second phase particles having an area of 0.01 μm 2  or more measured by a cross sectional observation is 50% or more.    
     
     
         7 . The titanium copper alloy having excellent punchability according to  claim 5 , wherein; 
 the average particle size of the second phase having an area of 0.01 μm 2  or more measured by a cross sectional observation is 2.0 μm or less.    
     
     
         8 . The titanium copper alloy having excellent punchability according to  claim 5 , wherein; 
 the coefficient of variation Cv (standard deviation/mean value) of the density of the second phase particles having an area of 0.01 μm 2  or more, observed in each crystal grains by means of a cross sectional observation, is 0.3 or less.    
     
     
         9 . A titanium copper alloy consisting of 2.0 to 4.0 mass % of Ti, 0.05 to 0.50 mass % in total of at least one selected from a group consisting of Co, Ni, Si, Cr, V, Nb, Zr, B and P, and the balance of Cu and having excellent punchability characterized in that; 
 it comprises 0.01 mass % or less in total of inevitable impurities; and the ratio of X ray diffraction intensity of the alloy satisfies I(311)/I(111)≧0.5.    
     
     
         10 . The titanium copper alloy having excellent punchability according to  claim 9 , wherein; 
 the number of Cu—Ti—X type composition particles (wherein X is an element selected from Co, Ni, Si, Cr, V, Nb, Zr, B and P) in the second phase particles having an area of 0.01 μm 2  or more measured by a cross sectional observation is 50% or more.    
     
     
         11 . The titanium copper alloy having excellent punchability according to  claim 9 , wherein; 
 the average particle size of the second phase having an area of 0.01 μm 2  or more measured by a cross sectional observation is 2.0 μm or less.    
     
     
         12 . The titanium copper alloy having excellent punchability according to  claim 9 , wherein; 
 the coefficient of variation Cv (standard deviation/mean value) of the density of the second phase particles having an area of 0.01 μm 2  or more, observed in each crystal grains by means of a cross sectional observation, is 0.3 or less.