新型热处理方法制备超高强度Inconel 718合金
Ultra-high strength Inconel 718 alloy produced by a novel heat treatment
冉蓉 1王洋 1任富强 1张元祥 1方烽 1张维娜 1袁国 1王国栋1
作者信息
- 1. 东北大学轧制技术及连轧自动化国家重点实验室,沈阳 110819
- 折叠
摘要
为改善Inconel718合金的组织并优化性能,提出一种980 ℃,1 min高温超短退火和随后的双时效相结合的新型热处理方法.结果表明,超短退火处理产生了部分再结晶组织,KAM图表明即使在变形晶粒中也形成了再结晶晶核.因此,高温超短退火克服了再结晶势垒,使得后续的再结晶过程可以在较低温度的时效处理过程中完成,从而获得了均匀细化的组织(～3.59 μm).980-1min-aged样品具有优异的拉伸性能,室温极限强度和总伸长率分别为1600 MPa和19％.650 ℃热拉伸条件下的极限强度和伸长率分别约为1350 MPa和26％.因此,高温超短退火能有效提高Inconel718合金的性能.
Abstract
In order to ameliorate microstructure and optimize properties of Inconel 718 alloy,a novel heat treatment method combining high-temperature ultra-short annealing at 980 ℃ for 1 min with subsequent double aging was proposed.The results showed that ultra-short annealing generated partially recrystallized microstructure and recrystallized nuclei were formed even in deformed grains,which was confirmed by KAM maps.Therefore,high-temperature ultra-short annealing overcame recrystallization barrier,and the subsequent recrystallization process could be completed during aging treatment with relatively low temperature,resulting in the uniformly refined microstructure(～3.59 μm).The 980-lmin-aged sample exhibited outstanding tensile properties.The room temperature ultimate strength and total elongation were 1600 MPa and 19％,respectively.The corresponding values of high-temperature(650 ℃)tensile tests were～1350 MPa and～26％.Consequently,ultra-short annealing can be a promising route to enhance the properties of Inconel 718 alloy.
关键词
Inconel/718合金/超高强度/δ相析出相/再结晶行为/时效处理Key words
Inconel 718 alloy/ultra-high strength/δ precipitates/recrystallization behavior/aging treatment引用本文复制引用
基金项目
National Natural Science Foundation of China(52104372)
Fundamental Research Funds for the Central Universities,China(N2107001)
Postdoctoral Research Foundation of China(2019M651129)
Postdoctoral Research Foundation of China(2019TQ0053)
出版年
2024
NETL
NSTL
万方数据