【摘要】 设计了4种不同成分的引线框架铜合金,通过对比其硬度、强度、导电性以及软化温度等,分析了合金中P,N i,S i,Cr合金元素对合金各性能的影响.研究结果表明:采用合理的热处理工艺可以使Cu-3N i-0.6S i基合金在时效过程中析出尺寸在20~40nm之间的-δN i2S i颗粒,使合金的强度和导电率达到良好的匹配;微量的P能有效地提高合金的强度、硬度和弹性模量,同时使N i2S i析出颗粒的弥散度提高,尺寸减小,但会降低合金的导电率;少量的Cr能有效提高合金的强度和软化温度.更多还原

【Abstract】 Four alloys for lead frame applications were prepared and the effects of alloying elements,P,Ni,Si and Cr additions on the properties of alloys were studied.The results indicate that by proper aging treatment Ni₂Si precipitates with diameters of 20 to 40 nm form in the Cu-3Ni-0.6Si alloy and the alloy exhibits high strength and good electrical conductivity.Microalloying of phosphorus may increase the strength effectively and decrease the size of precipitates,while resulting in reduction of electrical conductivity.Small amount of Cr increases the strength of the alloys and raises the softening temperature.更多还原