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采用金相显微镜、扫描电镜、X射线衍射仪、能谱分析仪、导电仪和硬度计,研究了不同热处理工艺对Cu-0.6Cr-0.15Zr-0.12Fe-0.06P合金组织和性能的影响。结果表明:固溶处理后合金电导率、硬度均有所下降;时效处理后,合金电导率快速上升;硬度随时效时间的延长,先升后降;时效温度提高,达到时效硬化峰值的时间就越短,电导率上升的也越快。合金经980℃×2 h+500℃×3 h处理后,电导率可达44.2 MS·m~(-1),硬度可达154.76 HV0.2,软化温度达到603℃。合金析出相主要成分是以Cr为主的(Cr Zr Fe P)化合物和(Cr Zr P)化合物。试验对比了980℃×2 h固溶后时效和未经固溶直接时效两种工艺,发现合金电导率相差不大,但经过固溶处理后合金析出相颗粒分布更均匀,硬度峰值升高18 HV0.2。
The effects of different heat treatment processes on the microstructure and properties of Cu-0.6Cr-0.15Zr-0.12Fe-0.06P alloy were studied by optical microscope, scanning electron microscopy, X-ray diffraction, energy dispersive spectroscopy, conductivity meter and hardness tester. The results show that the electrical conductivity and hardness of the alloys decrease after solution treatment. The electrical conductivity of the alloys increases rapidly after the aging treatment. The hardness increases with the aging time and then decreases. The aging temperature increases and the time to reach the age hardening peak The shorter the conductivity, the faster the rise. After the alloy was treated at 980 ℃ for 2 h and 500 ℃ for 3 h, the conductivity reached 44.2 MS · m -1, the hardness reached 154.76 HV0.2 and the softening temperature reached 603 ℃. The major components of the alloy precipitation phase are Cr-based (Cr Zr Fe P) compounds and (Cr Zr P) compounds. The experimental results show that the conductivity of the alloy is similar to that of the alloy after aging at 980 ℃ for 2 h and the direct aging without solution treatment. However, after the solution treatment, the particle distribution of the precipitated phase is more uniform and the peak hardness increases by 18 HV0.2.