形变热处理对高强导电弹性Cu-Zn-Ni-Al合金组织性能的影响
Effects of Thermo-mechanical Treatment on Microstructure and Properties of Cu-Ni-Zn-Al Alloy with High Strength Electrical Conductivity and Elasticity
孙晋明, 苏玉长, 周小中
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作者单位：中南大学 材料科学与工程学院, 湖南 长沙 410083
中文关键字：Cu-Zn-Ni-Al合金； 形变热处理； 力学性能； 导电率； 微观组织； 析出强化
英文关键字：Cu-Zn-Ni-Al alloy; thermo-mechanical treatment; mechanical properties; electrical conductivity; microstructure; precipitation strengthening
中文摘要：研究了固溶-冷变形-时效处理对高强导电弹性Cu-Zn-Ni-Al合金力学性能、导电率和显微组织的影响。结果表明，经固溶与冷变形处理后进行时效热处理，合金的抗拉强度、屈服强度和电导率都大幅度提高。825 ℃×1 h固溶+80%冷轧变形+450 ℃× 1 h时效处理是Cu-Zn-Ni-Al合金综合性能较好的热处理工艺，其抗拉强度、屈服强度和伸长率分别为1065、1017 MPa和2.0%；最佳导电率可达38.1%IACS。合金的微观组织为固溶体和弥散相颗粒(主要是γ'相) ，析出强化是合金强化的主要原因。
英文摘要：The effects of solution-cold rolling-aging process on the mechanical properties, electrical conductivity and microstructure of Cu-Zn-Ni-Al alloy with high strength electrical conductivity and elasticity were studied. The results show that the tensile strength, yield strength and electrical conductivity of the alloy increase greatly after sold solution-cold rolling-aging process. The optimum thermo-mechanical treatment process is solution at 825 ℃ for 1 h and 80% cold rolling and then aging at 450 ℃ for 1 h, the tensile strength, yield strength and elongation of the Cu-Zn-Ni-Al alloy can reach 1065 MPa, 1017 MPa and 2%, respectively. Optimal electrical conductivity of Cu-Zn-Ni-Al alloy can reach 38.1%IACS. The microstructure of the alloy is solid matrix and dispersive second-phase γ' phase, precipitation strengthening is the prime strengthening mechanism of the studied alloy.