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COPPER ALLOY, MEMBER IN CONTACT WITH WATER, COMPOSED OF COPPER ALLOY, AND PRODUCTION OF COPPER ALLOY
COPPER ALLOY, MEMBER IN CONTACT WITH WATER, COMPOSED OF COPPER ALLOY, AND PRODUCTION OF COPPER ALLOY
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机译:铜合金,与水接触的成员,由铜合金组成,以及铜合金的生产
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摘要
PROBLEM TO BE SOLVED: To obtain a Cu-Zn-Sn alloy for a member in contact with water, excellent in dezincification resistance and machinability, by subjecting a Cu-Zn- Sn alloy of specified composition to heating and cooling under respectively specified temp. conditions and changing its structure. ;SOLUTION: In producing a Cu-Zn-Sn alloy having a composition consisting of 0.9-3.0% Sn, 37-45% Zn, and the balance Cu, the alloy is heat-treated at 500-550°C for 30sec and then cooled down to 350°C at ≤0.4°C/sec cooling rate. In the structure of this alloy, γ-phases of ≥3% content are precipitated at 3-20% area occupancy in the grain boundaries of α-phases having ≥0.5% Sn content and 40-97% area occupancy, or the γ-phases are precipitated in the grain boundaries of the α-phases and β-phases having ≥1.5% Sn content and 0-40% area occupancy. By this method, the Cu-Zn-Sn alloy, remarkably improved in dezincification resistance and machinability and having excellent properties required of a member in contact with water, such as water tap, can be produced.;COPYRIGHT: (C)1998,JPO
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