STUDY OF TCP PHASE PRECIPITATING IN GH4199 SUPERALLOY

查看全文 作　　者：T.Cui Y.S.Zhang S.W.Guo L.Wang [1,2]H.C.Yang 机构地区：[1]SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang110004,ChinaManuscriptreceived15July2003;[2]inrevisedform19January2004; 出　　处：《Acta Metallurgica Sinica(English Letters)》索引2004年第17卷第5期,共6页 摘　　要：The precipitating regulation and mechanism of TCP phase (μ phase and σ phase) are studied, using electron hole number (EHN) theory, phase analysis technology and TEM observation. The results indicate that the EHN in studied alloy is 2.311-2.348 which is higher than that of critical EHN of μ phase precipitate (2.30), so μ phase could precipitate if there is enough thermo-exposition. In contrast, the calculated EHN is less than that of critical EHN of σ phase precipitate (2.52). However the σ phase is also observed by TEM. Enrich of Cr and Mo around γ phase after γ′phase precipitated leads to σ phase precipitated. 关 键 词：超耐热合金 GH4199 TCP相 电子空穴计算 物理性能 热处理工艺