首页|新型热处理方法制备超高强度Inconel 718合金

新型热处理方法制备超高强度Inconel 718合金

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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.
Ultra-high strength Inconel 718 alloy produced by a novel heat treatment
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.

Inconel 718 alloyultra-high strengthδ precipitatesrecrystallization behavioraging treatment

冉蓉、王洋、任富强、张元祥、方烽、张维娜、袁国、王国栋

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东北大学轧制技术及连轧自动化国家重点实验室,沈阳 110819

Inconel 718合金 超高强度 δ相析出相 再结晶行为 时效处理

National Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities,ChinaPostdoctoral Research Foundation of ChinaPostdoctoral Research Foundation of China

52104372N21070012019M6511292019TQ0053

2024

10.1016/S1003-6326(24)66535-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(7)