航天推进技术研究院主办
WANG Kai,ZHANG Jing,LIU Jintao,et al.Preformed blank optimization and microstructure uniformity control of GH4586 alloy turbine disk[J].Journal of Rocket Propulsion,2021,47(01):83-89.
GH4586合金涡轮盘预制坯优化与组织均匀性控制
- Title:
- Preformed blank optimization and microstructure uniformity control of GH4586 alloy turbine disk
- 文章编号:
- 1672-9374(2021)01-0083-07
- Keywords:
- GH4586 alloy; turbine disk; microstructure uniformity; forging; preformed blank
- 分类号:
- TG113.1; TG316.3
- 文献标志码:
- A
- 摘要:
- GH4586合金涡轮盘是新一代液体火箭发动机的核心部件之一,服役环境极其恶劣,提高涡轮盘模锻件微观组织均匀性有益于提高产品力学性能的稳定性和可靠性。通过热压缩试验,研究了变形温度、应变对GH4586合金微观组织和再结晶行为的影响,得到了GH4586合金热成形工艺参数范围; 结合有限元仿真和模锻成形试验,分析了不同预制坯形状对涡轮盘模锻件应变分布和组织均匀性的影响,采用从边缘到中心梯度升高的双陀螺形预制坯形状、在1 060 ℃条件下进行模锻成形,可以获得组织均匀的涡轮盘模锻件,心部晶粒度等级达到6~7级,盘部R/2处和边缘处晶粒度等级7~8级; 室温、低温和高温力学性能均满足标准要求,特别是-196 ℃时延伸率和600 ℃时抗拉强度相较原工艺方案分别提高了37%和12%。
- Abstract:
- GH4586 alloy turbine disk is one of the core components of the new generation liquid rocket engine.Due to the extremely terrible service environment, it is necessary to improve the microstructure uniformity of turbine disk in die forging and therefore is beneficial to improve the stability and reliability of mechanical properties. The effects of temperature and strain on the microstructures and recrystallization behavior of GH4586 alloy were studied by hot compression tests, and the range of hot forming process parameters were obtained. Based on finite element simulation and die forging experiment, the effects of different preformed blanks on strain distribution and uniformity of microstructure were compared and analyzed. The turbine disk die forging with uniform microstructure was obtained by using the double gyro preform shape with gradient rising from edge to center, and forged at 1 060 ℃. The grain size reached 6~7 at the core, and 7~8 when locating at the middle and edge. The mechanical properties of GH4586 alloy turbine disk made by the preformed blank at room temperature, cryogenic and high temperature all meet the requirement of the standards, especially the elongation at -196 ℃ and the ensile strength at 600 ℃ were increased by 37% and 12% compared with the one made by original scheme,respectively.
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备注/Memo
收稿日期:2019-12-15
基金项目:装备发展部载人航天领域预先研究项目(05XX02)
作者简介:王凯(1991—),男,硕士,研究领域为火箭发动机金属材料热成形。