摘要
研究了4种热处理制度对GH4169合金显微组织、室温拉伸、650℃拉伸和持久性能的影响。结果表明:980℃固溶加两阶段时效处理,合金的室温和650℃拉伸的屈服强度和抗拉强度最高;960℃固溶加两阶段时效处理,合金的持久寿命最长。固溶处理调整y相的含量,主要强化相y"在720℃时效时析出,辅助强化相y'在620℃时效析出。
The effects of the solution and aging treatment on the microstructure, the tensile properties at room-temperature and 650 ℃and the stress rupture of GH4169 superalloy were investigated. The results show that after solution at 980 ℃ and aging at 720 ℃ plus 620 ℃, both the yield strength and ultimate strength of the superalloy at room-temperature and 650 ℃ are highest; after solution at 960 ℃ and aging at 720 ℃ plus 620 ℃, the stress rupture life of the superalloy tested at 650 ℃ and 725 MPa is the longest; the solution treatment can adjust the amount of 3 phase, primary strengthening γ＇ phase precipitates upon aging at 720 ℃, while assistant strengthening γ＇ phase precipitates at 620 ℃.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第8期1830-1834,共5页
Rare Metal Materials and Engineering
基金
National Important Base Research and Development Program(2010CB631203)
