Cu-Cr-Fe合金的时效析出行为

Aging Characteristics of Cu-Cr-Fe Alloy

采用真空熔炼方法制备了Cu-0.32Cr-1.82Fe、Cu-0.33Cr和Cu-1.87Fe合金,随后分别进行了固溶-时效和固溶-冷变形-时效处理。采用XRD物相分析、点阵参数测量、硬度和电导率测试等手段,研究了合金在不同热处理状态下的时效行为。结果表明,同时添加Cr、Fe元素能够显著提高合金硬度,但对导电性能影响不大。Cu-0.32Cr-1.82Fe合金经1000℃×2h固溶处理、80%变形,在480℃时效60min后其硬度(HV)和电导率分别可达215和31.9MS/m。

Cu-0.32Cr-1.82Fe,Cu-0.33Cr and Cu-1.87Fe alloys were prepared by vacuum melting,subsequently,the alloy ingots were treated by solution plus aging and solution-cold deformation-aging. Aging characteristics of three alloys were investigated by XRD (X-ray diffraction),hardness and electrical conductivity measurements as well as lattice parameters measurement. It is found that although Cr and Fe addition can greatly improve the hardness of the alloy,it plays somewhat role in electrical conductivity of the alloy. The micro-hardness and electrical conductivity of Cu-0.32Cr-1.82Fe alloy reach 215HV and 31.9MS/m after solution treatment at 1000℃ for 2 hours and 80% cold deformation and aging at 480℃ for 1 hours.