热处理对喷射成形GH742y合金组织与性能的影响  

Effect of Heat Treatments on Microstructure and Properties of Spray Formed Superalloy GH742y

作　　者：袁华[1] 李周[1] 张国庆[1] 许文勇[1] 姚瑞平[1] 田世藩[1] 

机构地区：[1]北京航空材料研究院先进高温结构材料国防重点实验室,北京100095

出　　处：《材料工程》2008年第1期61-63,67,共4页Journal of Materials Engineering

基　　金：国家高技术研究发展计划资助项目(2006AA03Z114)

摘　　要：研究不同的固溶温度热处理对变形喷射成形GH742y合金组织与性能的影响。结果表明:喷射成形GH742y合金晶粒细小、成分均匀、无宏观偏析,晶粒尺寸约35μm左右,固溶温度对其影响不大,具有明显的晶粒抗长大性。γ′相的固溶温度为1130℃,不同固溶温度的热处理下,主要强化相γ′相析出的形状和大小不同,对合金的力学性能影响不大,不同热处理状态合金的屈服强度都在1150MPa左右,而持久性能也普遍在200h。The effects of different solution treatments on microstructure and properties of spray formed superalloy GH742y after forged were studied. The results showed that spray formed superalloy GH742y exhibited homogenous composition, segregation-free and fine microstructure. The grain size was about 35μm and hasn＇t changed with increasing temperature. The solvus temperature of γ＇phase was about 1130℃. The shape and size of γ＇phase were different,but mechanical properties of GH742y did not change after different heat treatments. The yield strength and stress rupture time of the alloy reached 1150MPa and 200h respectively in different heat treatments.

关 键 词：喷射成形 高温合金 热处理 组织与性能 GH742y 

分 类 号：TG132.32[一般工业技术—材料科学与工程]