航空发动机轴承基体强韧性与组织稳定性协同控制成形制造基础研究

Aeroegine is the core support for implementing the strategy of reinvigorating aviation industry in our nation. However, its self-development is severely restricted by the service life problem of aeroegine bearing, which works as a key component in aeroegine. Facing the technical difficulties and scientific problems of cooperative control of obdurability and microstructural stability in forming manufacturing of bearing body required by long-life aeroegine bearing, this project proposed a new forming manufacturing method combined net-shape cold ring rolling and dual-phase heat treatment for aeroegine bearing, by utilizing the combined effects of advanced plastic forming and heat treatment to realize the cooperative control of obdurability and microstructural stability. Based on multidisciplinary and multiscale theoretical calculation and experiment, the effects of net-shape cold ring rolling and dual-phase heat treatment on the interaction mechanism of cooperative control of obdurability and microstructural stability are studied, the correlation mechanism among the technological conditions, microstructural state, obdurability and microstructural stability is explored, the theory and technology design method for forming manufacturing of bearing body with cooperative control of obdurability and microstructural stability is established. This research can provide important scientific theory and method to breakthrough the key technique of long-life aeroegine bearing manufacturing and promote the independent development of aeroegine in our nation.

航空发动机作为我国航空工业强国战略实施的核心支撑，其自主发展受到关键零零部件轴承寿命问题的严重制约。面对长寿命航空发动机轴承对基体成形制造提出的强韧性和组织稳定性协同控制技术难题及其科学问题，本项目提出近形冷轧环与复相热处理相结合的航空发动机轴承基体成形制造新方法，利用先进塑性成形和热处理工艺的协同作用实现对基体强韧性与组织稳定性的协同控制。为此，本项目通过多学科多尺度理论计算和实验测试，研究近形冷轧环和复相热处理工艺对基体强韧性和组织稳定性的协同作用机理，探究工艺条件、组织状态与基体强韧性及组织稳定性之间关联机制，建立轴承基体强韧性与组织稳定性协同控制成形制造理论与技术设计方法。通过本项目研究，将为突破长寿命航空发动机轴承关键技术提供重要科学理论和方法，助力我国高性能航空发动机自主研制。

本项目面向我国高端航发装备自主发展重大需求和长寿命航发轴承瓶颈制约，针对轴承基体组织状态控制成形制造关键问题，提出近形冷轧成形-复相热处理协同调控组织强韧性与稳定性的成形制造创新技术思路。项目从理论、方法和工艺多层面，研究了近净冷轧-复相热处理成形制造过程组织遗传演化规律、工艺条件与组织状态之间内联关系、基体组织状态调控方法、基体组织状态控制成形制造工艺，揭示了航发轴承基体冷轧成形-复相热处理组织演化规律和工艺作用机理，建立了成形制造工艺条件与组织状态量化关系，提出了轴承基体成形制造组织强韧性与稳定性调控方法，研发了轴承基体组织强韧性/稳定性控制成形制造工艺，实现了航发轴承研制验证。项目发表论文27篇、SCI 收录21篇；授权中国发明专利15项、日本发明专利1项；培养国家高层次青年人才1人、博士和硕士研究生5人。项目研究为我国高性能航发轴承成形制造技术创新与应用提供了重要基础支撑。