钇对高强高导Cu-Cr-Zr合金组织与性能的影响
Effect of Yttrium on Microstructure and Properties of High Strength and High Conductivity Cu-Cr-Zr Alloy
张成功 1乔振兴 1史志铭 1新巴雅尔 1峰山 1刘慧敏 1敖敏1
作者信息
- 1. 内蒙古工业大学材料科学与工程学院,多功能铜材料内蒙古自治区工程研究中心,内蒙古呼和浩特 010051
- 折叠
摘要
采用非真空熔炼和近液相线铸造相结合的方法制备Cu-Cr-Zr-Y合金,并对其进行固溶、室温轧制与时效处理,研究Y对Cu-Cr-Zr合金组织与性能的影响.结果表明,Cu-0.6Cr-0.14Zr-0.15Y合金的铸态组织为均匀细小的等轴晶,平均晶粒尺寸约为11 μm.Y的加入抑制时效过程中Cr元素的析出.Cu-0.6Cr-0.14Zr-0.15Y合金中出现纳米级Cr,Cu5Zr,CuY析出相和纳米孪晶,平均尺寸分别为5～20 nm和15 nm.Cu-0.6Cr-0.14Zr-0.15Y合金经固溶-室温轧制-时效后,抗拉强度达到550 MPa,相对电导率达到85％IACS,较相同后处理条件下的Cu-0.6Cr-0.14Zr合金抗拉强度提高了 27.3％、相对电导率下降了3.4％.
Abstract
A series of Cu-Cr-Zr-Y alloys was prepared by a combination of non-vacuum melting and near-liquid-phase casting methods,which was subjected to solid solution,room-temperature rolling and aging treatment to investigate the effects of rare-earth Y on the structure and characteristics of Cu-Cr-Zr alloys.The results show that the as-cast structure of Cu-0.6Cr-0.14Zr-0.15Y alloy is a uniform fine isometric crystal with an average grain size of about 11 pm.The addition of rare-earth element Y inhibits the precipitation of Cr elements during aging,and the nano-scale Cr,Cu5Zr and CuY precipitation phases and nano-twins appear in Cu-0.6Cr-0.14Zr-0.15Y al-loy with an average size of 5-20 nm and 15 nm,respectively.The Cu-0.6Cr-0.14Zr-0.15Y alloy achieves a ten-sile strength of 550 MPa and a relative electrical conductivity of 85％IACS after solid solution-room temperature rolling-aging,which increases the tensile strength by 27.3％and decreases the relative conductivity by 3.4％compared with the Cu-0.6Cr-0.14Zr alloy under the same post-treatment conditions.
关键词
稀土Y/Cu-Cr-Zr合金/微观组织/抗拉强度/相对电导率Key words
rare earth Y/Cu-Cr-Zr alloy/microstructure/tensile strength/relative electrical conductivity引用本文复制引用
基金项目
内蒙古自治区自然科学基金(2021LHMS05002)
内蒙古自治区直属高校基本科研业务费项目(JY20220039)
出版年
2024
NETL
NSTL
万方数据