固溶和时效处理后Cu-0.41Cr-0.2Zr合金的相分析  

Phase Analysis of Cu-0.41Cr-0.2Zr Alloy After Solution Treatment and Aging Treatment

作　　者：赵美 刘莹 白晶 张全庆 蓸宇飞 ZHAO Mei;LIU Ying;BAI Jing;ZHANG Quan-qing;CAO Yu-fei(College of Material Science and Engineering,Yingkou Institute of Technology,Yingkou 115014,Liaoning,China)

机构地区：[1]营口理工学院材料科学与工程学院,辽宁营口115014

出　　处：《铸造》2024年第1期81-85,共5页Foundry

基　　金：营口市博士双创计划项目(项目编号:QB-2021-06);营口理工学院引进人才科研启动项目(项目编号:YJRC202008);辽宁省自然科学基金计划区域联合基金项目(项目编号:2022-YKLH-08)。

摘　　要：以Cu-0.41Cr-0.2Zr合金为研究对象,在真空熔铸和固溶与时效处理的工艺条件下,借助扫描电子显微镜(SEM)、能谱(EDXS)、透射电子显微镜(TEM)和选区电子衍射分析(SAED)对其进行相分析,结果表明:980℃×2 h固溶,水淬,450℃×20 h时效,空冷处理后的Cu-0.41Cr-0.2Zr合金中有三种组成相,分别为:铜基体相、富铬相和富锆相,不存在铬和锆的中间相,且相的大小呈双峰分布:粗大相的尺寸在微米数量级,细小相的尺寸在纳米数量级,均为单质铬和Cu5Zr。析出相与基体共格时,合金的抗拉强度为432 MPa,屈服强度为335 MPa,伸长率为31%,硬度为(HV0.2)131,导电率为81%IACS,部分Cr析出相与基体呈N-W的位向关系。In this paper,Cu-0.41Cr-0.2Zr alloy was researched,and its phase was analyzed by means of scanning electron microscope(SEM),energy dispersive X-ray diffraction(EDXS),transmission electron microscope(TEM)and selected area electron diffraction analysis(SAED)under the technological conditions of vacuum casting,solution and aging treatment.The results show that Cu-0.41Cr-0.2Zr alloy has three phases:copper-based phase,chromium-rich phase and zirconium-rich phase,and there is no intermediate phase between chromium and zirconium after solid solution at 980℃for 2 hours,water quenching and aging at 450℃for 20 hours and air cooling.And the size of the phase presents a bimodal distribution:the size of the coarse phase is in micron size,and the size of the fine phase is in nanometer size,all of which are elemental chromium and Cu5Zr.When the precipitates are coherent with the matrix,the tensile strength,yield strength,elongation,hardness and electrical conductivity of the alloy are 432 MPa,335 MPa,31%,131(HV0.2)and 81%IACS,respectively,and some Cr precipitates have a N-W orientation relationship with the matrix.

关 键 词：Cu-0.41Cr-0.2Zr合金 显微组织结构 相分析 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG146.1[金属学及工艺—金属学]