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对固溶态铝青铜(Cu-2.2%Al、Cu-4.5%Al、Cu-7%Al)进行深冷处理(Deep Cryogenic Treatment,DCT),研究深冷时间和层错能对铝青铜微观组织、布氏硬度与拉伸性能影响。结果表明:铝青铜经深冷处理后晶粒得到细化,并形成孪晶。随着深冷时间的延长,Cu-2.2%Al、Cu-4.5%Al和Cu-7%Al铝青铜的布氏硬度先增大再减小,最后趋于平稳,在10~12 h达到峰值,分别为98.5 HBS、93.7 HBS和96.1 HBS,并建立了布氏硬度与深冷时间的关系方程。延长深冷时间可以提高铝青铜的屈服强度,但是对抗拉强度、均匀伸长率的影响差别不大。层错能对Cu-2.2%Al和Cu-4.5%Al合金的抗拉强度影响不大,但是对Cu-7%Al合金的抗拉强度提高显著;屈服强度和均匀伸长率则随着层错能的降低而升高。
The deep cryogenic treatment (DCT) of solid solution aluminum bronze (Cu-2.2% Al, Cu-4.5% Al and Cu-7% Al) Brinell hardness and tensile properties. The results show that the grains of aluminum bronze are refined and form twins after cryogenic treatment. With the extension of cryogenic time, the Brinell hardness of Cu-2.2% Al, Cu-4.5% Al and Cu-7% Al aluminum bronze first increased and then decreased, finally stabilized and peaked at 10-12 h , Respectively 98.5 HBS, 93.7 HBS and 96.1 HBS, and established the relationship between Brinell hardness and cryogenic time. Lengthen the cryogenic time can improve the yield strength of aluminum bronze, but the impact on tensile strength, uniform elongation little difference. The stacking fault energy has little effect on the tensile strength of the Cu-2.2% Al and Cu-4.5% Al alloys, but the tensile strength of the Cu-7% Al alloy increases significantly. The yield strength and uniform elongation of the Cu- False energy decreases and increases.