粉末冶金技术2026，Vol.44Issue(1)：126-134,9.DOI:10.19591/j.cnki.cn11-1974/tf.2024110009
热处理对热等静压Inconel 718合金组织和性能的影响
Effect of heat treatment on the microstructure and properties of Inconel 718 alloys prepared by hot isostatic pressing
摘要
Abstract
Inconel 718 alloy ingots were fabricated by powder metallurgy hot isostatic pressing.Three kinds of heat treatments were carried out on the Inconel 718 alloy ingots,namely solution treatment(holding at 980 ℃ for 1 h and then quenching in water)+aging treatment(holding at 780 ℃ for 8 h and then air cooling),solution treatment(holding at 1020 ℃ for 1 h and then quenching in water)+aging treatment(holding at 780 ℃ for 8 h and then air cooling),and solution treatment(holding at 1020 ℃ for 1 h and then quenching in water)+aging treatment(holding at 720 ℃ for 8 h and then air cooling).The microstructure and mechanical properties of Inconel 718 alloy ingots before and after heat treatment were analyzed by optical microscope,scanning electron microscopes,and transmission electron microscope.The results show that the strength of the hot isostatic pressing Inconel 718 alloy ingots is comparable to that of the forged piece.Due to the presence of the prior particle boundaries,the plasticity of Inconel 718 alloys is weakened to a certain extent,and the overall plasticity level is slightly lower than that of the forged piece.After the solution treatment,some δ phases in the prior particle boundaries dissolve,thereby weakening to a certain extent the detrimental effect of the prior particle boundaries on the plasticity of Inconel 718 alloy ingots.As the aging temperature rises,the γ"/γ'phase undergoes the excessive aging,resulting in a decrease in strength and an increase in plasticity.The optimal heat treatment is solution treatment(holding at 1020 ℃ for 1 h followed by water quenching)+aging treatment(holding at 780 ℃ for 8 h followed by air cooling).关键词
Inconel 718合金/热等静压/原始粉末颗粒边界/热处理Key words
Inconel 718 alloys/hot isostatic pressing/prior particle boundaries/heat treatment分类
矿业与冶金引用本文复制引用
何阳,翟亚中,车洪艳..热处理对热等静压Inconel 718合金组织和性能的影响[J].粉末冶金技术,2026,44(1):126-134,9.基金项目
钢铁研究总院有限公司特殊钢研究院自主投入研发专项(所22T61140) （所22T61140）
