铜银锆合金组织与性能的研究（1）  

作　　者：姚映君 

机构地区：[1]北京有色金属与稀土应用研究所,北京100012

出　　处：《有色金属与稀土应用》2006年第1期8-19,共12页Non-Ferrous Metals & Rareearth

摘　　要：采用中频熔炼-铁模激冷铸造-热轧-冷轧-热处理工艺，制备了Cu—Zr，Cu—Ag—Zr两种成分高强高导铜合金。通过硬度测试、拉伸测试、电导率测试、金相分析、XRD、SEM等方法研究了固溶—时效工艺对上述合金力学性能，导电性能及其组织结构的影响和变化规律。研究结果表明：1．Cu—Zr合金和Cu-Ag—Zr合金的最佳形变热处理制度是：固溶950℃×1h＋变形30％＋时效450℃×4h，合金的抗拉强度分别达到365MPa和367MPa，屈服强度分别达到了327MPa和338MPa，延伸率则分别为11％和12％；同一条件下的电导率分别为93．8IACS％和95．2IACS％；2．理论上分析认为，Cu—Zr合金的高强度来源于铜锆化合物粒子的析出强化，高导电性来源于合金在时效过程中Zr以铜锆化合物粒子的形式析出；3．Cu—Ag-Zr合金的力学性能和电学性能均优于Cu—Zr合金的力学性能和电学性能，那是因为Cu—Ag—Zr合金中添加了Ag，Ag产生了固溶强化，提高了合金的强度而不降低其电导率。Cu-Ag, Cu-Zr, Cu-Ag-Zr alloys were prepared by median frequency melting-iron mould casting-hot rolling-cold rolling-heat treatment.The microstructures and properties of them were studied using tensile test, hardness and electrical properties measurement, and metallography, XRD and SEM analysis technique.The results show that： The first, the optimized heat treatment of Cu-Zr alloy and Cu-Ag-Zr alloy that both reduced by 30% is solution treatment at 950℃ for 60min, quenched,and then aging at 450℃ for 4h, the mechanical and electrical performance of Cu-Zr alloy can reachσb = 365MPa, σ0.2 =327MPa, δ5=11% σr =93.8IACS%,while Cu-Ag-Zr can reachσb=367MPa, σ0.2=338MPa, δ5=12% σr=95.2IACS%; The second, we can make a conclusion that during aging, solid solution decomposed and Cu-Zr particles precipitated,and grain refinement, the alloy have obviously aging strengthening effect; because Ag and Zr do not reduce the electric property of copper alloy, and Zr will precipitate from matrix in aging treatment.Finally, the mechanical and electrical performance of Cu-Ag-Zr alloy is higher than Cu-Zr alloy.That is because the higher performance comes from the solid solution decomposed.

关 键 词：铜锆合金 铜银锆合金 热处理 组织 性能 

分 类 号：TG146.414[一般工业技术—材料科学与工程] TG146.11[金属学及工艺—金属材料]