摘要
采用光学显微镜(OM)和扫描电镜(SEM)研究了固溶温度、固溶时间及时效温度对不同冷轧变形量的GH4090合金扁丝显微组织和析出相演变的影响。结果表明:当变形量为60%,GH4090合金扁丝固溶后的晶粒最粗大,晶粒度在4.5级~5.5级,当变形量为68%,固溶后晶粒被细化,晶粒度在6.0级~7.5级;固溶时间对GH4090合金扁丝晶粒的影响最小,固溶时间从15 min延长至45 min,晶粒度基本不变;随着固溶温度的升高,组织逐渐粗化,退火孪晶数量减少,形状由宽变窄,由短变长;时效温度为550~600℃时,GH4090合金扁丝γ′相的尺寸小于20 nm,弥散分布于基体,M_(23)C_(6)次生碳化物析出温度为650℃,随着时效温度的升高,M_(23)C_(6)碳化物向晶界一侧长大,呈片层状分布。
Effect of solution treatment temperature and time,and aging temperature on microstructure and precipitation phase evolution of GH4090 alloy flat wire with different cold rolling deformation was studied using optical microscope(OM)and scanning electron microscopy(SEM).The results show that when the deformation is 60%,the grain size of the GH4090 alloy flat wire after solution treatment is the largest,and the grain size grade is 4.5-5.5.When the deformation amount is 68%,the grain size is refined after solution treatment,and the grain size grade is 6.0 to 7.5.The effect of solution treatment time on the grain size of the GH4090 alloy flat wire is minimal.The solution treatment time is increased from 15 min to 45 min,and the grain size remains basically unchanged.As the solution treatment temperature increases,the microstructure gradually coarsens,the number of annealing twins decreases,and the shape changes from wide to narrow and from short to long.When the aging temperature is between 550-600℃,the size ofγ′phase of the GH4090 alloy flat wire is less than 20 nm,dispersed uniformly in the matrix,and the precipitation temperature of M_(23)C_(6) secondary carbides is 650℃.With the increase of aging temperature,the M_(23)C_(6) carbides grow towards one side of the grain boundary and form a lamellar distribution.
作者
张十庆
李少龙
赵振
袁波
刘建雄
王宏
雷玖芳
李方
唐远寿
何钦生
王建桥
ZHANG Shi-qing;LI Shao-long;ZHAO Zhen;YUAN Bo;LIU Jian-xiong;WANG Hong;LEI Jiu-fang;LI Fang;TANG Yuan-shou;HE Qin-sheng;WANG Jian-qiao(Chongqing Materials Research Institute Co Ltd,Chongqing 400700,China;National Instrumentation Functional Materials Engineering and Technology Research Center,Chongqing 400700,China;Hunan Power Machinery Research Institute of AVIC,Zhuzhou 412002,China;Sichuan Pan China Aviation Instrument Electric Co Ltd,Chengdu 610599,China;Avic South Industrial Co Ltd,Zhuzhou 412002,China)
出处
《材料热处理学报》
北大核心
2025年第7期203-213,共11页
Transactions of Materials and Heat Treatment
基金
重庆英才-创新领军人才(CQYC20210301302)。
关键词
GH4090合金
冷变形
热处理
显微组织
析出相
GH4090 alloy
cold deformation
heat treatment
microstructure
precipitated phase
