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本文在经过固溶和冷变形处理Cu-Cr-Zr合金的等温时效过程中同时施加电流密度为100A/cm2的直流电流和不同磁感应强度的静磁场,发现电磁复合场能显著影响Cu-Cr-Zr合金的组织及性能.和无磁场下时效后合金性能相比,施加磁场后的合金电导率和显微硬度值均有一定程度的升高,其中在350℃,10T磁场下效果最明显,分别升高了22.1%IACS和25.3HV.利用透射电镜观察显微组织观察发现,施加磁场后合金组织中位错密度有所降低,同时出现了大量细小弥散的铬析出物,表明电磁复合场能进一步促进铜合金的时效过程,在低温时效时尤其明显.分析认为,电磁复合场对Cu-Cr-Zr合金时效过程的促进作用机理是磁场增强了电流的“电子风”效应.
In this paper, the DC current of 100A / cm2 and the static magnetic field of different magnetic induction are applied simultaneously in the isothermal aging process of Cu-Cr-Zr alloy after solution treatment and cold deformation. It is found that the electromagnetic composite field can significantly affect the Cu- Zr alloy.The magnetic conductivity and microhardness of the alloy after magnetic field application increase to a certain extent compared with that of the alloy without aging under the condition of magnetic field without aging, of which the effect is most obvious at 350 ℃ and 10T magnetic field, Respectively, increased by 22.1% IACS and 25.3HV respectively.Using TEM, the dislocation density of the alloy was decreased and a large number of small and diffusive chromium precipitates were observed, indicating that the electromagnetic field energy And further promote the aging process of copper alloy, especially at low temperature aging.Analysis shows that the mechanism of electromagnetic complex field on the aging process of Cu-Cr-Zr alloy is that the magnetic field enhances the “electron wind” effect of current.