航发轴承套圈电磁辅助轧制成形残余应力和组织演变  

Residual Stress and Microstructure Evolution of Aero-Engine Bearing Rings Using Electromagnetic Aided Rolling Forming

作　　者：钱东升[1,2,3] 陈建城 刘毅 王丰 QIAN Dongsheng;CHEN Jiancheng;LIU Yi;WANG Feng(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Zhejiang Tianma Bearing Group Co.,Ltd.,Huzhou 311103,China;Hubei Engineering Research Center for Green&Precision Material Forming,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]浙江天马轴承集团有限公司,浙江湖州311103 [3]材料绿色精密成形湖北省工程技术研究中心,武汉430070

出　　处：《轴承》2024年第11期43-49,共7页Bearing

基　　金：国家自然科学基金资助项目(52305414);国家重点研发计划资助项目(2020YFA0714904)。

摘　　要：8Cr4Mo4V轴承钢被广泛应用于航空发动机主轴轴承,其热轧成形过程中易出现晶粒粗大等缺陷,导致强韧性不足。冷轧成形可实现晶粒细化,提高轴承钢的综合力学性能,具有巨大应用潜力,但8Cr4Mo4V轴承钢的碳含量和合金含量较高,冷轧过程中易产生微纳损伤和应力集中等缺陷。提出了电磁能场辅助轴承钢冷轧成形的创新技术思路,研究电磁辅助轧制对8Cr4Mo4V轴承钢残余应力和组织演变的影响。结果表明,电磁辅助轧制可调控轴承钢位错密度,减少碳化物与相界处的位错缠结,使残余应力均匀化并提高拉伸性能,实现8Cr4Mo4V轴承钢细晶低损伤成形。8Cr4Mo4V bearing steel is widely used in main shaft bearings for aero-engines.However,during hot rolling forming process,defects such as coarse grains often occur,leading to insufficient strength and toughness.In contrast,cold rolling forming has the potential to refine grains and enhance overall mechanical properties of the bearing steel,exhibiting great potential for application.Due to high carbon and alloy content of the bearing steel,micro-nano damages and stress concentration defects are prone to occur during cold rolling process.An innovative technical idea is proposed for electromagnetic energy field aided cold rolling forming of the bearing steel.The impact of electromagnetic aided rolling one residual stress and microstructural evolution of the bearing steel is investigated.The results indicate that the electromagnetic aided rolling can tailor the dislocation density of the bearing steel,reduce the dislocation entanglement at carbide and phase boundaries,homogenize the residual stress,improve the tensile properties,and realize the fine-grained and low-damage forming of the bearings steel.

关 键 词：滚动轴承 高温轴承钢 航空发动机 轴承套圈 冷轧 电磁成形 

分 类 号：TH133.3[机械工程—机械制造及自动化] TG142.1[一般工业技术—材料科学与工程]