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研制了新型集成电路引线框架Cu-Cr-Zr系列合金,通过电导率、硬度、抗拉强度测试以及透射电镜观察,考察了微量合金元素La,Fe/Ti,Co/Ti元素以及时效工艺对合金性能的影响。结果表明:稀土元素La可以改善A合金(Cu-Cr-Zr-Zn)的硬度及导电率;加入Fe/Ti,Co/Ti元素,大大提高了合金的强度和硬度,并使其时效的强度及硬度峰值延后。在970℃固溶处理、70%冷变形及不同温度时效2 h后,A合金(Cu-Cr-Zr-Zn)及B合金(Cu-Cr-Zr-Zn-La)在450℃时达到硬度和强度峰值,分别为HV 1 770 MPa和525 MPa及HV 1 840 MPa和554 MPa,电导率分别为78%和80%IACS;在970℃固溶处理,60%冷变形,500℃时效2 h,50%冷变形及不同温度2次时效2 h后,C合金(Cu-Cr-Zr-Zn-Fe-Ti-La)及D合金(Cu-Cr-Zr-Zn-Co-Ti-La)在450℃时达到硬度和强度峰值,分别为HV 2 120 MPa,683 MPa及HV 2 040 MPa和651 MPa,电导率分别为65%和70%IACS。
A series of new Cu-Cr-Zr alloyed leadframes have been fabricated. The conductivity, hardness, tensile strength and transmission electron microscopy of Cu-Cr-Zr alloy have been investigated. The effect of microalloy elements La, Fe / Ti, Co / The impact of performance. The results show that the hardness and electrical conductivity of the alloy A (Cu-Cr-Zr-Zn) can be improved by adding rare earth element La. The addition of Fe / Ti and Co / Ti greatly improves the strength and hardness of the alloy, And hardness peak delay. After solution treatment at 970 ℃, 70% cold deformation and aging at different temperatures for 2 h, the hardness of Cu alloy (Cu-Cr-Zr-Zn) and B alloy (Cu-Cr-Zr-Zn-La) reached 450 ℃ And peak intensity respectively HV1 770 MPa and 525 MPa and HV1 840 MPa and 554 MPa, and the conductivity were 78% and 80% IACS respectively; solution treatment at 970 ℃, 60% cold deformation and aging at 500 ℃ for 2 h , 50% cold deformation and 2 times aging at different temperatures for 2 hours, the C alloy (Cu-Cr-Zr-Zn-Fe-Ti- The hardness and strength peaks reached HV2 120 MPa, 683 MPa and HV 2 040 MPa and 651 MPa respectively at 450 ° C with conductivities of 65% and 70%, respectively.