摘要
对不同时效时间的镍基高温合金的组织进行观察,探究其在高温时效过程中组织及性能的演变规律,利用光学显微镜和扫描电镜对合金时效前后的组织进行了观察,提出了定量分析合金组织演变的方法,并对合金时效前后的硬度进行了测试分析。结果表明,900℃无载荷时效20 h后,γ′相呈立方状并且尺寸并无明显变化,时效100 h后,γ′相由立方形开始向圆形转变;时效500 h后,γ′相形状更加不规则,一些γ′与相邻的γ′相连,呈现长条状,但仍有一部分保持立方状;时效2000 h时后,γ′相明显粗化,立方度明显降低。随着时效时间的延长,γ′相尺寸逐渐长大,合金的硬度呈现减小的变化趋向。
Microstructure of nickel-based superalloy with different aging time was observed to explore the evolution law of microstructure and properties in the process of high temperature aging.By using OM and SEM to observe and analyze the microstructure of the alloy before and after aging,a method for quantitative analysis of microstructure evolution was proposed,and the hardness of the alloy before and after aging was tested and analyzed.The results show that after aging at 900℃for 20 h without loading,theγ′phase is cuboidal and the size does not change obviously.When aging for 100 h,theγ′phase changes from cube to circle.After aging for 500 h,the shape ofγ′phase becomes more irregular.Someγ′phases are connected with neighboringγ′,showing a long strip shape,but some of them remain cubic shape.When aging for 2000 h,γ′phase is coarsened obviously and cubed degree is decreased obviously.With the aging time,the size ofγ′phase grows gradually,and the hardness of the alloy shows a decreasing trend.
作者
蔡晨阳
曹铁山
王威
迟庆新
程从前
赵杰
Cai Chenyang;Cao Tieshan;Wang Wei;Chi Qingxin;Cheng Congqian;Zhao Jie(School of Dalian University of Technology,Materials Science and Engineering Dalian,Dalian Liaoning 116024,China;China Aerospace Shenyang Engine Research Institute,Shenyang Liaoning 110066,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第1期9-15,共7页
Heat Treatment of Metals
基金
航空发动机及燃气轮机基础科学中心项目(P2021-A-IV-001-001)。
关键词
镍基高温合金
长期时效
γ′相
组织
定量分析
nickel-based superalloy
long-term aging
γ′phase
microstructure
quantitative analysis
