718P1us合金η相析出行为及其对热变形行为的影响
Precipitation Behavior of η Phase and Its Effect on Hot Deformation in 718Plus Alloy
寇金凤 1白亚冠 1张鑫 1郭伟 1张冰冰 1李红梅 1聂义宏2
作者信息
- 1. 天津重型装备工程研究有限公司,天津 300457
- 2. 中国第一重型机械股份公司,黑龙江 齐齐哈尔 161042
- 折叠
摘要
采用OM、SEM、热压缩模拟试验机等研究了 718Plus合金固溶态的显微组织、η相的组织演变及无η相析出、少量η相析出、大量η相析出的试样经不同压缩量压缩后的再结晶组织,得到了不同温度不同变形速率下的压缩工艺.结果表明,718Plus合金中η相析出峰值温度在900 ℃.η相溶解受时间影响较大,在1040 ℃固溶2h后η相可完全溶解.预先析出少量η相在大变形过程中有利于动态再结晶的发生,而大量析出 η相在大变形过程中抑制动态再结晶的发生.在大变形量、合适的温度、合适的变形速率下,预先析出的少量η相与动态再结晶过程相互作用,有利于获得均匀、细小的晶粒组织.
Abstract
Solid-state microstructure,microstructure evolution of η phase and the recrystallization microstructure of 718Plus alloy with different η phase after compression with different compression amounts were investigated by OM,SEM and the thermal simulation compression testing machine.The compression process of different temperatures and deformation rates were obtained.The results show that the peak temperature of η phase precipitation occurs at 900 ℃.The dissolution behavior of ηphase is mainly affected by solution time,and it dissolves effectively after solution treatment at 1040 ℃ for 2 h.A small quantity of η phase contributes to dynamic recrystallization in large deformation process while a large quantity of η phase restrain dynamic recrystallization.At appropriate deformation temperature and rate,a small quantity of η phase interacts with the dynamic recrystallization process,which makes for the uniform fine crystal structure.
关键词
718Plus合金/η相/析出/回溶/动态再结晶Key words
718Plus alloy/η phase,precipitation/dissolution/dynamic recrystallization引用本文复制引用
出版年
2024
NETL
NSTL
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