均匀化处理对Cu-Cr-Zr合金显微组织的影响  

Effects of homogenization treatment on the microstructure of Cu-Cr-Zr alloy

作　　者：彭丽军[1] 解浩峰[1] 尹向前[1] 杨振[1] 米绪军[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088

出　　处：《有色金属科学与工程》2014年第5期68-73,共6页Nonferrous Metals Science and Engineering

基　　金：北京市科技项目(10231103);科研院所技术开发研究专项基金(2011DIA5k023)

摘　　要：采用OM、SEM和TEM分析手段对Cu-Cr-Zr合金的铸态和均匀化组织进行研究.结果表明,Cu-Cr-Zr合金的铸态组织呈典型的枝晶状组织,主要由网状的Cr枝晶、共晶组织和基体组成,其中共晶组织是由基体和层片状的Cu5Zr相组成.在Cu-Cr-Zr合金的均匀化退火过程中,发生共晶组织的溶解和Cr相的析出.随着均匀化退火温度和时间的升高和延长,共晶组织逐渐溶解,Cr相的析出体积分数逐渐减小.合理的均匀化退火制度为900℃×12 h.The as-cast and homogeneous microstructures are analyzed by optical microscope, scanning electron microscope and transmission electron microscope. The results show that the as-cast microstructure of Cu-CrZr alloy is typical dendritic structure which is mainly made up of Cr dendrite and eutectic structures and matrix. Eutectic structures are composed of Cu and Cu5 Zr phase with a fine lamellar structure. By increasing the homogenization temperature or prolonging the holding time, the eutectic structure is dissolved into the matrix gradually with obvious reduced fraction volume and Cr phases. The proper homog enizing process is900 ℃×12 h.

关 键 词：CU-CR-ZR合金 均匀化处理 显微组织 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TF125.2[金属学及工艺—金属材料]