摘要: |
镍基高温合金GH4169镍含量高达50%以上,是一种以析出强化为主、固溶强化和晶界强化为辅的变形高温合金,在650℃以下高温环境工作时,不仅具有优异的高温强度、极高抗氧化和耐腐蚀性能,而且还具有良好的焊接性能,广泛应用于航空航天发动机等高温零部件。随着我国航空航天发动机不断的更新换代,对内燃机和发动机用镍基高温合金的高温热强性和耐候性提出了更高的要求。针对GH4169合金纯净化制备方法、焊接性能、热加工工艺和锻造等方面,系统介绍了制备技术和热加工的作用,总结了最优的熔炼技术、焊接工艺和热加工技术,分析了GH4169变形高温合金的应用和发展趋势。 |
关键词: GH4169高温合金;强化相;高温热强性;冶炼工艺 |
基金项目: |
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Research Progress of High Purity and Low Segregation GH4169 Alloy |
Li Erhang Zhang Jinghai Jia Dongfeng Zhang Bao Zhang Long Ma Jing
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Xi’an Gangyan Functional Materials Co., Ltd., Xi’an 710000
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Abstract: |
Ni-base superalloy GH4169, which contains more than 50% Ni, is a deformed superalloy with precipitation strengthening, solution strengthening and grain boundary strengthening, not only has excellent high temperature strength, extremely high oxidation resistance and corrosion resistance, but also has good welding and mechanical properties, widely used in aerospace engines, petrochemical, nuclear industry and other fields. With the development of industrialization in our country, the high temperature heat strength and weatherability of Ni-base superalloy for internal combustion engine and engine are required. In view of GH4169 alloy purification preparation method, welding performance, hot working process and so on, the preparation technology and the effect of strengthening phase alloying are introduced systematically, and the different smelting process and hot working technology are summarized, the application and development trend of GH4169 deformed superalloy are prospected. |
Key words: GH4169 superalloy;strengthening phase;high temperature thermal strength;smelting process |