高强高弹Cu-Ti-(Cr)合金时效行为研究  

Investigation on aging behavior of high strength and high elasticity Cu-Ti-(Cr) alloy

作　　者：王博涵 王佳康 李绍威 许晨玲 李廷举[1] WANG Bohan;WANG Jiakang;LI Shaowei;XU Chenling;LI Tingju(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning China;Dalian Huicheng Aluminum Co.,Ltd.,Dalian 116105,Liaoning China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024 [2]大连汇程铝业有限公司,辽宁大连116105

出　　处：《中国铸造装备与技术》2020年第5期14-20,共7页China Foundry Machinery & Technology

摘　　要：以Cu-3Ti合金为研究对象,系统地研究了不同时效条件下合金组织演变及性能的差异,以此探讨了Cu-3Ti的最佳时效工艺。此外,通过添加Cr元素,探究了Cr元素对合金组织及性能的影响,并进一步研究了不同变形量下形变Cu-Ti-Cr合金的时效行为。结果表明:添加Cr元素可以减缓调幅分解进程,延迟不连续沉淀形核长大过程。虽然Cu-3Ti-0.5Cr合金在固溶状态下硬度与电导率均落后于Cu-3Ti,但在90%轧制和450℃时效12h后,硬度高于Cu-3Ti,电导率也未出现大幅下降。Taking the Cu-3 Ti alloy as the research object, the difference of alloy structure evolution and performance under different aging conditions have been systematically studied. The best aging process of Cu-3 Ti has been discussed. In addition, by adding Cr element, the influence of Cr on the structure and properties of the alloy has been explored, and the aging behavior of the deformed Cu-Ti-Cr alloy under different deformation amounts has been further studied. The results show that the addition of Cr can slow down the process of amplitude modulation decomposition and delay the process of discontinuous precipitation and nucleation. Although the hardness and electrical conductivity of Cu-3 Ti-0.5 Cr alloy are lower than Cu-3 Ti in solid solution state, but after 90% rolling and aging at 450℃ for 12 h, the hardness is higher than Cu-3 Ti, and the electrical conductivity does not appear significantly decline.

关 键 词：铜钛合金 时效 不连续沉淀 电导率 

分 类 号：TG146.11[一般工业技术—材料科学与工程]