Rare earth microalloying copper base alloy, preparation method and method for extruding rods

The invention relates to a rare earth microalloying copper base alloy, a preparation method and a method for extruding rods, and belongs to the field of machining of corrosion resistant copper alloys. The rare earth microalloying copper base alloy consists of the following components in percentage by weight: 7.0-7.5% of Ni, 6.8-7.3% of Al, 2.0-2.5% of Fe, 1.8-2.4% of Mn, 0.01-0.15% of RE, and the balance of Cu and inevitable impurities. The invention further discloses the preparation method of the copper base alloy; the preparation method mainly comprises three processes of burdening, smelting and casting; and the smelting is performed according to the charging sequence of copper, nickel, iron, manganese, aluminum and rare earth. The invention further relates to the method for extruding the rods. The rare earth microalloying copper base alloy is excellent in mechanical performance and corrosion resistance in the ocean engineering. 本发明涉及种稀土微合金化铜基合金、制备方法及挤压成棒材的方法，属于耐蚀铜合金加工领域，本发明的稀土微合金化铜基合金，由以下重量百分比的组分组成：Ni：7.0％