Cu-Ni-Si Cu-Ni-Si BASED COPPER ALLOY HAVING EXCELLENT WEAR-RESISTANCE OF MOLDING

摘要

(Task) Provide a Cu-Ni-Si-based copper alloy having excellent mold abrasion resistance. (Solution) As a mass%, Ni: 2.0-5.0%, Si: 0.3-1.5%, Ni/Si ratio is 1.3 or more and 6.7 or less, the balance is made of Cu and unavoidable impurities, and 0.2% yield strength YS is 700 ㎫ or more, the first Ni-Si particles having a diameter of 0.5 to 0.6 µm are 0.04 × 10 ³ to 1.4 × 10 ³ /mm 2, and the number of second Ni-Si particles having a diameter of less than 0.5 µm is the first Ni-Si It is a Cu-Ni-Si-based copper alloy with a number of particles greater than 4.0 × 10 ³ particles/mm 2.