冷变形及时效处理对Cu-0.3Zr-0.2Cr合金组织与性能的影响
Effects of cold deformation and aging on microstructure and properties of Cu-0.3Zr-0.2Cr alloy
李政遨 1刘勇 1侯瑾睿 1周孟 1景柯 1邹晋 2贾延琳3
作者信息
- 1. 河南科技大学 材料科学与工程学院,洛阳 471023
- 2. 江西省科学院 江西省铜钨新材料重点实验室,南昌 330096
- 3. 中南大学 材料科学与工程学院,长沙 410083
- 折叠
摘要
采用真空熔炼法制备Cu-0.3Zr-0.2Cr合金,将其热锻后在900℃进行固溶处理,随后进行轧制量30%与60%的冷轧处理,之后再对合金进行(400～550℃,0～360 min)的时效处理;对时效处理后合金进行性能测试及显微组织观察.结果表明:固溶后的合金再经过60%的冷轧+450℃时效120 min后拥有较好的性能,硬度可达179HV,抗拉强度为467 MPa,导电率为88.5%IACS,伸长率为12.1%,此时合金主要存在Copper织构;在450℃时效360 min后合金的主要织构转变为Brass织构,织构的转变对合金的延展性有一定的影响;时效处理后,基体析出大量纳米尺寸的Cr相,这导致合金的强度与导电率大幅升高.
Abstract
The Cu-0.3Zr-0.2Cr alloy was prepared by vacuum melting method.After hot forging,the Cu-0.3Zr-0.2Cr alloy was solution treated at 900℃,followed by 30%and 60%cold rolling,respectively.Then the alloy was aged at 400-550℃for 0-360 min.After aging treatment,the properties and microstructures of the alloy were tested and observed.The results show that after 60%cold rolling and 450℃ageing for 120 min,the alloy has better performances,the hardness is up to 179HV,the tensile strength is 467 MPa,the electrical conductivity is 88.5%IACS,and the elongation is 12.1%.Meanwhile,the alloy mainly has copper texture.After aging for 360 min,the main texture of the alloy changes to a brass texture.The transformation of texture has a certain effect on the ductility of the alloy.After aging,the matrix precipitates a large number of nano-sized Cr phases,which leads to a significant increase in the strength and electrical conductivity of the alloy.
关键词
Cu-0.3Zr-0.2Cr合金/轧制/时效处理/强化机理Key words
Cu-0.3Zr-0.2Cr alloy/rolling/aging treatment/strengthening mechanism引用本文复制引用
基金项目
河南省自然科学基金(232300420089)
中国博士后科学基金(2023TQ0107)
江西省重点研发计划(20224BBE51047)
出版年
2024
NETL
NSTL
维普
万方数据