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采用大气熔炼制备了Cu-Cr和Cu-Cr-Ti合金铸坯,经热轧-固溶-冷轧-时效工序制备了厚1.5 mm的带材,研究了Ti元素添加和时效处理对试验合金的影响。结果表明,相比于Cu-Cr二元合金,Cu-Cr-Ti合金不但能够保持较高的导电性能,Ti元素的添加显著加快了Cu-Cr合金时效硬化响应速度,明显提高了合金的时效硬化效果,峰值时效(400℃×8 h)态Cu-Cr-Ti合金的维氏硬度125 HV,抗拉强度517 MPa,对应的电导率71.2%IACS;此外,通过导电率与析出相体积分数关系的分析,确定了不同温度下时效的相变动力学Avrami经验方程和电导率方程,并绘制了两种合金的TTT曲线。
The Cu-Cr and Cu-Cr-Ti alloy billets were prepared by atmospheric melting. The 1.5 mm-thick strip was prepared by hot rolling-solution-cold-rolling-aging process. The effects of Ti addition and aging treatment on the wear resistance of the test alloy Impact. The results show that compared with Cu-Cr binary alloys, Cu-Cr-Ti alloy can not only maintain high electrical conductivity, Ti addition significantly accelerates the Cu-Cr alloy aging hardening response speed, significantly improve the aging of the alloy The Vickers hardness of Cu-Cr-Ti alloy at peak aging (400 ℃ × 8h) is 125 HV, the tensile strength is 517 MPa, and the corresponding conductivity is 71.2% IACS. In addition, the electrical conductivity and the volume fraction of precipitated phase The relationship between the temperature, the phase transition dynamics Avrami empirical equation and the conductivity equation were determined at different temperatures, and the TTT curves of the two alloys were drawn.