工程科学学报2016，Vol.38Issue(9)：1278-1287,10.DOI:10.13374/j.issn2095-9389.2016.09.012
高铌高磷GH4169 C和GH4169合金的组织稳定性
Microstructure stability of GH4169 and GH4169 C alloys with high content of phosphorus and niobium
倪童伟 1董建新 1张麦仓 1姚志浩1
作者信息
- 1. 北京科技大学材料科学与工程学院，北京100083
- 折叠
摘要
Abstract
To study the microstructural stability of GH4169C alloy with high content of phosphorus and niobium, the microstruc-ture and hardness of GH4169C alloy and GH4169 alloy after long time aging were comparatively analyzed in this paper. These two su-peralloys were subjected to aging treatment at 600, 650, 704 and 720℃ for different times from 30 h to 10000 h. The microstructural evolution of the alloys was characterized by using a field emission scanning electron microscope and a Brinell hardness tester. The re-sults indicate that, at the service temperature of 650℃, GH4169 alloy and GH4169C alloy show excellent structure stability. Howev-er, above the service temperature, GH4169 alloy and GH4169C alloy have poor structure stability. In a short period of time, the two alloys lose stability. In contrast, the microstructure stability of GH4169C alloy is higher than that of GH4169 alloy with aging at 704℃, while GH4169C alloy shows a lower stability compared with GH4169 alloy at 720℃. It is thought that the stability of γ'phase in GH4169C alloy increases with increasing Nb and P contents. GH4169C alloy shows a better microstructure stability than GH4169 alloy at 704℃. However, the content of δphase will also increase with increasing Nb content, leading to the decrease in microstructure sta-bility of GH4169C alloy. At ultrahigh temperature (720℃), the microstructure stability of GH4169C alloy is inferior to GH4169 al-loy. This means that, compared with GH4169 alloy, the modified GH4169C alloy can be used in a higher temperature, whereas the temperature increase is limited, the microstructure stability of GH4169C alloy will decrease at ultrahigh temperature.关键词
镍基高温合金/铌/磷/时效/微观组织Key words
nickel base superalloys/niobium/phosphorus/aging/microstructure分类
矿业与冶金引用本文复制引用
倪童伟,董建新,张麦仓,姚志浩..高铌高磷GH4169 C和GH4169合金的组织稳定性[J].工程科学学报,2016,38(9):1278-1287,10.
