Fe-38Ni-13Co-4.7Nb合金中的γ'相长大及分布规律研究  

Investigation of Coarsening and Distribution Law ofγ'Phase in Fe-38Ni-13Co-4.7Nb Superalloy

作　　者：支敏学[1] 张绍维[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《材料工程》1999年第10期17-20,共4页Journal of Materials Engineering

摘　　要：研究了Ｆｅ－３８Ｎｉ－１３Ｃｏ－４．７Ｎｂ合金中γ'相长大及分布规律。结果表明，该合金的ｒ１相不稳定，易聚集长大，其平均尺寸增长遵循时间的立方根规律，在７２０℃和６５０℃的长大速率分别为０．１０ｕｍ３／ｓ和４．２６×１０－３ｎｍ３／ｓ。γ'相的大小分布符合ＬＳＥＭ规律。其长大扩散激活能为２４２．１５ｋＪ／ｍｏｌ。Ａｌ元素的缺乏是导致γ'相不稳定的原因。The coarsening and distribution law of r1 phase in Fe- 38Ni- 13Co- 4. 7Nb superalloy hasbeen studied. The results show that the r1 particle is unstable and apt to coarsening. The mean r1phase dimension increases linearly with the cube root of time, with the coarsening rate of0. 10nm3 /s and 4. 26 X 10-3 nm3 /s at 720 'C and 650 'C, respectively. The distribution of r' phaseis explained by LSEM law. The activation energy for the growth of Y' phase is estimated to be242. 15kJ/mol. The reason for the unstableness of r' phase is short of Al element.

关 键 词：低膨胀 高温合金 γ′相 分布规律 激活能 

分 类 号：TG132.11[一般工业技术—材料科学与工程] TG132.32[金属学及工艺—合金]