双级时效处理对稀土铝电工圆杆组织与性能的影响
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摘要
采用抗拉强度、导电率性能测试和X射线衍射(XRD)、扫描电镜(SEM)等分析方法研究双级时效对稀土铝合金电工圆杆组织和性能的影响。结果表明:经双级时效处理,合金的导电率随时效时间的延长不断增加,抗拉强度却持续下降;时效温度越高导电率越大,抗拉强度越低。经440℃×4 h固溶+150℃×10 h+185℃×8 h双级时效处理,材料综合性能较佳,导电率和抗拉强度分别为63.1%IACS、85.5 MPa。
The effects of two-stage aging on the microstructure and properties of rare-earch aluminum alloy electrical round rod were studied by means of tensile strength, electrical conductivity test and X-ray diffraction(XRD), scanning electron microscope(SEM) analysis. The results show that, after two-stage aging treatment, the electrical conductivity of aluminum alloy increases continuously with the prolongation of the time, but the tensile strength decreases continuously. The higher the aging temperature, the bigger the electrical conductivity and the lower the tensile strength. The comprehensive properties of the material are good after two-stage aging treatment at 440 ℃ ×4 h solid solution +150 ℃ ×10 h +185℃ ×8 h aging. The electrical conductivity and tensile strength are 63.1%IACS and 85.5 MPa, respectively.
The effects of two-stage aging on the microstructure and properties of rare-earch aluminum alloy electrical round rod were studied by means of tensile strength, electrical conductivity test and X-ray diffraction(XRD), scanning electron microscope(SEM) analysis. The results show that, after two-stage aging treatment, the electrical conductivity of aluminum alloy increases continuously with the prolongation of the time, but the tensile strength decreases continuously. The higher the aging temperature, the bigger the electrical conductivity and the lower the tensile strength. The comprehensive properties of the material are good after two-stage aging treatment at 440 ℃ ×4 h solid solution +150 ℃ ×10 h +185℃ ×8 h aging. The electrical conductivity and tensile strength are 63.1%IACS and 85.5 MPa, respectively.
引文
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[4]卢庆清.新型耐热导线在高压输电线路增容改造中的应用[J].福建建设科技,2015,30(1):69-71.
[5]唐继朋.耐热铝合金导线在电网建设中的应用[J].陕西电力,2008,36(3):49-51.
[6] Wang K, Liu K F, Zhang J B.Microstructure and properties of aging Cu-Cr-Zr alloy[J].Rare Metals,2014(2):134-138.
[7]闫焱,郑子樵,龙佳.7A55铝合金预拉伸板材的双级时效工艺[J].材料热处理学报,2010,31(11):128-133.
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