DD8单晶镍基高温合金热处理制度研究  

Investigation of the Heat Treatment in a Single Crystal Nickel base Superalloy

作　　者：张静华[1] 张志亚[1] 李英敖[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《材料开发与应用》1997年第1期27-33,共7页Development and Application of Materials

摘　　要：研究了热处理工艺对ＤＤ８单晶高温合金组织及性能的影响，结果表明，经过１１００℃／８ｈＡ．Ｃ．＋１２４０℃／４ｈＡ．Ｃ．＋１０９０℃／２ｈＡ．Ｃ．＋８５０℃／２４ｈＡ．Ｃ的４级处理明显改善了ＤＤ８单晶合金元素的枝晶偏析，合金中γ相获最佳含量并形成适当尺寸配合，合金获得理想的综合性能。The effect of heat treatment on the microstructure and properties of DD8 single crystal nickel-base superalloy was investigated. The results show that the combined properties of the alloy can be obtained by using the heat treatment as follows:1100℃/8h A.C.+1240℃/4h A.C.+1090℃/2h A.C.+850℃/24h A.C. This is because the segregation of the alloying elements can be improved, the optimum content of the γ-precipitated and the critical misfit between the γ/γinterfaces can be obtained through the heat treatment.

关 键 词：单晶 高温合金 热处理 组织 持久性能 

分 类 号：TG166.7[金属学及工艺—热处理]