High-strength copper alloy

Abstract

A high-strength copper alloy contains 20 to 45% of zinc, 0.3 to 1.5% of iron, 0.3 to 1.5% of chromium, and a balance of copper, based on mass.

1 . A high-strength copper alloy containing 20 to 45% of zinc, 0.3 to 1.5% of iron, 0.3 to 1.5% of chromium, 0.2 to 3.5% of aluminum, 0.3 to 3.5% of calcium, and a balance of copper, based on mass. 
     
     
         2 . The high-strength copper alloy according to  claim 1 , wherein a content ratio (Fe/Cr) of said iron to said chromium is 0.5 to 2 based on mass. 
     
     
         3 . The high-strength copper alloy according to  claim 1 , wherein said high-strength copper alloy further contains at least one kind of element selected from the group consisting of 0.05 to 4% of lead, 0.02 to 3.5% of bismuth, 0.02 to 0.4% of tellurium, 0.02 to 0.4% of selenium, and 0.02 to 0.15% of antimony, based on mass. 
     
     
         4 . The high-strength copper alloy according to  claim 1 , wherein said high-strength copper alloy further contains 0.2 to 3% of tin, based on mass. 
     
     
         5 . (canceled) 
     
     
         6 . The high-strength copper alloy according to  claim 1 , wherein said high-strength copper alloy further contains at least one kind of element selected from a lanthanoid group consisting of lanthanum, cerium, neodymium, gadolinium, dysprosium, ytterbium, and samarium, and a total content of said at least one kind of element is 0.5 to 5%, based on mass. 
     
     
         7 . The high-strength copper alloy according to  claim 1 , wherein said high-strength copper alloy further contains at least one kind of element selected from the group consisting of 0.5 to 3% of manganese, 0.2 to 1% of silicon, 1.5 to 4% of nickel, 0.1 to 1.2% of titanium, 0.1 to 1.5% of cobalt, and 0.5 to 2.5% of zirconium, based on mass. 
     
     
         8 . The high-strength copper alloy according to  claim 1 , wherein said high-strength copper alloy includes iron-chromium compound particles at grain boundaries. 
     
     
         9 . The high-strength copper alloy according to  claim 8 , wherein said iron-chromium compound particles are particles precipitated at said grain boundaries during solidification in a casting method. 
     
     
         10 . The high-strength copper alloy according to  claim 9 , wherein said iron-chromium compound particles have a particle size of 10 to 50 μm. 
     
     
         11 . The high-strength copper alloy according to  claim 1 , wherein said copper alloy is a copper alloy subjected to hot plastic working after being produced by a casting method. 
     
     
         12 . The high-strength copper alloy according to  claim 11 , wherein said hot plastic working is a working method selected from the group consisting of extrusion, forging, rolling, drawing, and pulling.