热处理制度对GH4698高温合金组织与硬度的影响
Effect of heat treatment system on microstructure and hardness of GH4698 superalloy
张瑞 1张晓辰 2张正 3崔文明 1杨家典 3刘彦旭 4王纪兴 4白家元3
作者信息
- 1. 北京有色金属研究总院,北京 100088;国合通用测试评价认证股份公司,北京 100088;国合通用(青岛)测试评价有限公司,山东青岛 266042
- 2. 国合通用测试评价认证股份公司,北京 100088;国合通用(青岛)测试评价有限公司,山东青岛 266042
- 3. 贵州航宇科技发展股份有限公司,贵州贵阳 550000
- 4. 国合通用(青岛)测试评价有限公司,山东青岛 266042
- 折叠
摘要
研究了 GH4698高温合金在不同热处理制度下显微组织以及硬度的变化规律.结果表明,对于GH4698高温合金标准热处理制度,一次固溶冷却速度对γ'析出相的尺寸、含量、间距以及合金硬度的影响较小.在一次时效阶段,冷速越大,γ'相尺寸越小,硬度越高.一次时效温度在1000℃附近时,80～260 nm的γ'相能够有效析出,更有利于后续二次时效.在二次时效阶段,725～775 ℃温度范围,能够充分析出80 nm以下的小尺寸γ'相,然而在725 ℃以下及775 ℃以上温度范围,无法有效析出80 nm以下的小尺寸γ'相.
Abstract
Change law of microstructure and hardness of GH4698 superalloy under different heat treatment systems was studied.The results show that for the GH4698 superalloy standard heat treatment system,the primary aging cooling rate has a little effect on the size,content,spacing of y'precipitated phase and hardness.In the primary aging stage,the larger the cooling rate,the smaller the γ'phase size and the higher the hardness.When the primary aging temperature is near 1000 ℃,the γ'phase with size of 80-260 nm can precipitate effectively,which is more conducive to the subsequent secondary aging.In the secondary aging stage and in the temperature range of 725-775 ℃,the y'phase finer than 80 nm can fully precipitate,but when the temperature is below 725 ℃ and above 775 ℃,the γ'phase finer than 80 nm cannot precipitate effectively.
关键词
GH4698高温合金/热处理/时效温度/力学性能Key words
GH4698 superalloy/heat treatment/aging temperature/mechanical properties引用本文复制引用
基金项目
国家重点研发计划(2022YFF0609300)
出版年
2024
NETL
NSTL
万方数据