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研究了形变时效和淬火时效对含 Nb 和不含 Nb 的两种 Cu-15Ni-8Sn spinodal 分解型合金的力学性能、应力松弛性能和其他物理性能。经56%形变、400℃时效30min 能使这两种合金获得很高的强度(σb～1400MPa,σ_(0.2)～1300MPa)和弹性模量(E～140,000MPa);在200℃具有良好的抗应力松弛性能;加 Nb 的合金能改善250℃的抗应力松弛性能。淬火时效处理能获得适中的强度(σ_b900～950MFa,σ_(0.2)630～650MPa)和极良好的延性(δ～20%);加 Nb 能加速 spinodal分解,提高时效初期的强度。淬火时效态的两种合金在250℃下均显示良好的强度和弹性的稳定性,十分适合用作高温导电弹性材料。对调幅组织的强化和 Nb 的作用进行了讨论。
The mechanical properties, stress relaxation properties and other physical properties of two Cu-15Ni-8Sn spinodal decomposition alloys with or without Nb were studied by means of deformation aging and quenching aging. After 56% deformation and aging at 400 ℃ for 30min, the two alloys obtained very high strength (σb ~ 1400MPa, σ_ (0.2) ~ 1300MPa) and elastic modulus (E ~ 140,000MPa) Stress relaxation properties; plus Nb alloy can improve the anti-stress relaxation properties of 250 ℃. Quenching and aging treatment can obtain moderate strength (σ_b900 ~ 950MFa, σ_ (0.2) 630 ~ 650MPa) and very good ductility (δ ~ 20%); Nb can accelerate spinodal decomposition and improve the initial strength. Quenched state of the two alloys at 250 ℃ all showed good strength and elastic stability, very suitable for high temperature conductive elastic material. Intensification of the AM organization and the role of Nb are discussed.