文档介绍：均匀化处理对Cu-Cr-Zr合金显微组织的影响
彭丽军基金项目:北京科技项目(10231103),科研院所技术开发研究专项基金(2011DIA5k023)
作者简介:彭丽军(1986-),男,博士,工程师,主要从事高性能铜合金的制备与加工,
Email:penglijun198677@
*通信作者:米绪军(1967-),男,博士,教授,主要从事先进铜合金材料的制备与加工,Email:mxj@
,解浩峰,尹向前,杨振,米绪军*
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
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℃×12h。
关键词:Cu-Cr-Zr 合金;均匀化处理;显微组织
Effect of homogenization treatment on Microstructure of Cu-Cr-Zr alloy
Peng Lijun1, Xie Haofeng, Yin Xiangqian, Yang Zhen, Mi Xujun*
State Key Laboratory of Nonferrous Metals & Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China
Abstract: 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-Cr-Zr alloy is Cu matrix, Cr dendrite and eutectic structure which posed of Cu and Cu5Zr 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 and the volume fraction of the Cr phases is obviously reduced. And the proper homogenizing process is 900℃×12 h.
Keywords: Cu-Cr-Zr alloy; homogeniz