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采用中频感应熔炼炉制备了Cu-0.7Cr-0.15Zr和Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si两种合金,研究了Mg、Si复合微合金化对Cu-Cr-Zr合金时效工艺参数、性能与析出动力学的影响。结果表明:Mg、Si复合微合金化提高了Cu-Cr-Zr合金的最佳时效温度,延长了保温时间,Cu-0.7Cr-0.15Zr合金的最佳时效工艺为410℃时效8 h,Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si合金的最佳时效工艺为430℃时效14 h。Mg、Si复合微合金化提高了Cu-Cr-Zr合金的抗拉强度与导电率,Cu-0.7Cr-0.15Zr合金最佳工艺条件下的强度为570 MPa、电导率为79.1%IACS;Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si合金最佳时效工艺条件下的抗拉强度为595 MPa、电导率为80.4%IACS。Mg、Si复合微合金化改变了Cu-Cr-Zr合金Avrami相变动力学方程,减缓了时效析出过程。
The alloys Cu-0.7Cr-0.15Zr and Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si were prepared by IF induction melting furnace. The effects of Mg and Si micro-alloying on the aging process of Cu-Cr- Effect of Parameters, Performance and Precipitation Dynamics. The results show that the optimal micro-alloying of Mg and Si improves the optimum aging temperature and prolongs the holding time of Cu-Cr-Zr alloy. The optimum aging process of Cu-Cr-0.15Zr alloy is 410 ℃ aging 8 h, Cu The best aging process of -0.7Cr-0.15Zr-0.05Mg-0.02Si alloy is 430 ℃ aging 14 h. The micro-alloying of Mg and Si improves the tensile strength and electrical conductivity of the Cu-Cr-Zr alloy. The optimum strength of the Cu-0.7Cr-0.15Zr alloy is 570 MPa and the conductivity is 79.1% IACS. The tensile strength of -0.7Cr-0.15Zr-0.05Mg-0.02Si alloy under the optimum aging conditions is 595 MPa and the conductivity is 80.4% IACS. Mg and Si composite micro-alloying changes the Avrami transformation kinetics equation of Cu-Cr-Zr alloy, slowing the aging precipitation process.