COPPER-BASED ALLOY EXCELLENT IN CORROSION RESISTANCE, HOT WORKABILITY, AND RESISTANCE TO STRESS CORROSION CRACKING, AND PROCESS FOR PRODUCING THE COPPER-BASED ALLOY

摘要

The present invention provides a copper-based alloy characterized by: having a composition of 58.0 to 63.0% by weight of Cu, 0.5 to 4.5% by weight of Pb, 0.05 to 0.25% by weight of P, 0.5 to 3.0% by weight of Sn, 0.05 to 0.30% by weight of Ni, and the balance of Zn and inevitable impurities; having a texture uniformly fragmented to acquire excellent corrosion resistance and hot working property; having undergone a given drawing work and heat treatment to be exalted in mechanical properties including tensile strength, proof strength and elongation; and having internal stress thoroughly removed to excel in stress-corrosion cracking resistance. ;Therefore, it is possible to provide a copper-based alloy having the hot forging property that is inherent in a Pb-containing brass, exhibiting excellent dezincification corrosion resistance, abounding in economy because the use of P for improving corrosion resistance results in further lowering the cost of raw material, and exhibiting excellent stress-corrosion cracking resistance because it is subjected to a given drawing work and heat treatment.