摘要
对Cu-1.9Be-0.25Co合金进行780℃×4 h固溶处理与不同温度(300,320,340,360℃)和不同时间(1,2,4,8,16 h)的时效处理,研究了时效工艺对合金析出行为的影响规律。结果表明:获得峰时效的时效工艺为320℃×8 h,此时合金的硬度为422 HV;在320℃时效过程中合金析出相的演变规律为亚稳γ″相→半共格γ′相→非共格γ平衡相;时效初期(1~2 h)析出相短时间内大量析出是合金硬度快速升高的主要原因,时效中期(2~8 h)析出相与铜基体的半共格关系是获得峰时效的主要原因,时效后期(8\~16 h)析出相和基体脱离半共格关系,合金发生过时效,硬度降低。
Cu-1.9 Be-0.25 Co alloy was treated by solid solution treatment at 780℃for 4 h and aging treatment at different temperatures(300,320,340,360℃)for different holding times(1,2,4,8,16 h).The effect of aging on the precipitation behavior of the alloy was studied.The results show that the peak aging process was 320℃×8 h,and the hardness of the alloy under this process was 422 HV.The evolution of precipitates in Cu-1.9 Be-0.25 Co alloy during aging at 320℃was metastableγ′phase→semi-coherentγ′phase→non-coherent equilibriumγphase.A large number of precipitates in the early stage of aging(1-2 h)in a short time was the main factor for the rapid increase of alloy hardness.The semi-coherent relationship between precipitates and copper matrix in the middle of aging(2-8 h)was the main reason for peak aging.At the later stage of aging(8-16 h),the precipitates separated from the semi-coherent relationship with the matrix,the alloy was over aged and the hardness decreased.
作者
王磊
葛颂
郭鹏伟
康军伟
周坚
梁蒙
杨莹
周延军
WANG Lei;GE Song;GUO Pengwei;KANG Junwei;ZHOU Jian;LIANG Meng;YANG Ying;ZHOU Yanjun(Special Equipment Safety Inspection and Research Institute of Henan Province,Zhengzhou 450008,China;Institute of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction Collaborative Innovation Center of New Materials and Advanced Processing Technology of Nonferrous Metals,Luoyang 471023,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2021年第11期8-12,23,共6页
Materials For Mechanical Engineering
基金
河南省市场监督管理局科技计划项目(2020sj76)
河南省重点研发与推广专项(科技攻关)项目(212102210441)
河南省自然科学基金资助项目(202300410139)
中国工程科技发展战略河南研究院战略咨询研究项目(2021HENZDA02)。
