【摘要】 对两种不同Cr含量的合金Cu-0.43Cr0.058Zr0.031Y和Cu0.20Cr0.066Zr0.060Y,在900～980℃进行了固溶处理,并对显微硬度和电导率进行了测试,对固溶态金相组织进行了观察。结果表明,Cr含量较高的Cu0.43Cr0.058Zr0.031Y合金的固溶处理温度可采用960℃,而Cr含量较低的Cu0.20Cr0.066Zr0.060Y合金为920℃。两种合金固溶后分别在400～520℃进行时效,其电导率和显微硬度的测试对比结果表明,Cr含量较高的合金在较低温度(400℃)时效后的电导率比Cr含量较低合金的低,而较高温度(480℃)时效后Cr含量对电导率的影响不明显;Cr含量对合金显微硬度的影响较大,不同时效温度处理后,Cr含量高的合金硬度均明显低于低Cr含量合金。更多还原

【Abstract】 Micro-hardness and electric conductivities of Cu-0.43Cr-0.058Zr-0.031Y and Cu-0.20Cr-0.066Zr-0.060Y alloys treated by solid solution at 900～980 ℃ were measured,and microstructures of these solid solution alloys were observed.The results show that Cu-0.43Cr-0.058Zr-0.031Y alloy can be treated by solid solution at 960 ℃ while Cu-0.20Cr-0.066Zr- 0.060Y alloy only treated within 920 ℃.The comparison of electric conductivity and micro-hardness between the two solid solution treatment alloys after ageing at 400～520 ℃ reveals that the electric conductivity of Cu-0.43Cr-0.058Zr-0.031Y alloy is lower than that of Cu-0.20Cr-0.066Zr-0.060Y alloy after ageing at 400 ℃ while ageing at 480 ℃,Cr content can be ignored in effects on electric conductivity of two kinds of alloys.The hardness of Cu-0.43Cr-0.058Zr-0.031Y alloy is obviously lower than that of the Cu-0.20Cr-0.066Zr-0.060Y alloy regardless of ageing at 400 ℃ or 480 ℃.更多还原