Cu-Cr-Zr-Mg-Ce合金微观组织及时效工艺  

Microstructural of Cu-Cr-Zr-Mg-Ce Alloy and Its Aging Treatment

作　　者：侯彬[1] 陆亮亮[1] 刘松[1] 戴斯海 陈晓华[2] 王自东[1] 

机构地区：[1]北京科技大学材料科学与工程学院 [2]北京科技大学新金属材料国家重点实验室

出　　处：《特种铸造及有色合金》2014年第1期16-19,共4页Special Casting & Nonferrous Alloys

基　　金：教育部科技类博士点基金资助项目(20100006110026)

摘　　要：采用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)及能谱分析仪(EDS)对Cu-0.4Cr-0.2Zr-0.15Mg-0.02Ce合金的铸态、固溶态及时效态的组织进行了观察和相分析。结果表明,铸态合金为枝晶组织;在960℃×2h固溶后合金析出了条状金属间化合物;再经60%变形量的冷轧和480℃×8h时效,合金生成了Cr单质和Cu4Zr相。同时研究了在480℃下不同的时效时间(2、5、8、11、14、17h)下电导率和硬度。结果表明,在480℃×8h时效时硬度(HBW)达165,在480℃×11h时效后电导率达到了46.98MS/m。The microstructure of Cu-0.4Cr-0.2Zr-0.15Mg-0.02Ce alloy at as-cast,solid solution state and aging state was observed using optical microscope（OM）,scanning electronic microscope（SEM）and transmission electron microscope（TEM）.The precipitation phase of the alloy prepared was analyzed using energy dispersion spectrometer（EDS）.The results show that the microstructure of as-cast Cu-0.4 Cr-0.2Zr-0.15Mg-0.02Ce alloy exhibits typical dendrite structure,and the strip precipitated phase which is intermetallic compound contained Mg and Zr can be observed after solution treatment at 960℃ for 2h,and chromium-rich phase（Cr）and zirconium-rich phase（Cu4 Zr）can be generated after 60% cold-rolled deformation and aging at 480℃for 8h,meanwhile,Mg,Zr,Cr content in the strip intermetallic compound are increased obviously.The conductivity and hardness of the alloy with aging at 480℃ for different time such as 2、5、8、11、14、17hwere analyzed.The results show that the electric conductivity and hardness are increased quickly at first and then tended to stable state,finally decreased with increasing in the aging time.Conductivity and hardness reach the maximum values of 165and 46.98MS/ m,respectively,at 480℃×8hand at 480℃×11h,respectively.

关 键 词：Cu-Cr-Zr-Mg-Ce 微观组织 时效 电导率 硬度 

分 类 号：TG146.11[一般工业技术—材料科学与工程]