摘要
为了研究稀土Dy对Cu-Cr-Ti合金组织和性能的影响,采用金相显微镜、X射线衍射仪、扫描电子显微镜和能谱仪对添加不同含量Dy的时效态Cu-Cr-Ti合金析出相形貌、组织和成分进行了表征和分析,并对合金的硬度和导电率进行了测试.研究表明:Cu-0.3Cr-0.2Ti合金中形成新相CuTi3;富Dy相以4种形态存在,在Cu基体上以球形、柳叶状、颗粒状存在,晶界上以短棒状析出.经500℃保温1h时效处理后,Cu-0.3Cr-0.2Ti合金中0.1%Dy的添加有效地提高了合金的硬度和导电率,其硬度和导电率分别达138.8HV和98.3%IACS.
In order to study the influence of rare earth Dy addition on microstructure and properties of Cu-Cr-Ti alloy,the morphology of precipitation phases,microstructure and composition of aged Cu-Cr-Ti alloys with different Dy contents were characterized by optical microscope（OM）,X-ray diffractometer（XRD）,scanning electron microscopy（SEM）,and the hardness and electrical conductivity were tested as well.Results show that a new phase CuTi3 is formed in the Cu-0.3Cr-0.2Ti alloy,and Dy-rich phases are precipitated in the forms of sphere,lancet shape and granular in Cu matrix,and rod-like shape along the grain boundary.The addition of 0.1wt% Dy can effectively increase the hardness and electrical conductivity of Cu-0.3Cr-0.2Ti alloy,which can reach 138.8 HV and 98.3% IACS respectively after being aged at 500 ℃ for 1 h.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2010年第5期614-618,共5页
Materials Science and Technology
基金
国家自然科学基金资助项目(505740750)
教育部新世纪优秀人才计划资助项目(NCET-05-0873)
西安理工大学科技创新与特色研究计划资助项目(101220513)
