新型铸&锻GH4096合金篦齿盘研制与考核  

Development and Testing of Novel Casted & Wrought GH4096 Alloy Labyrinth Disk

作　　者：田伟 钟燕 刘砚飞 伏宇 白云瑞 付锐[2] 李福林[2] Tian Wei;Zhong Yan;Liu Yanfei;Fu Yu;Bai Yunrui;Fu Rui;Li Fulin(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China;Department of High-Temperature Materials,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]中国航发四川燃气涡轮研究院,四川成都610500 [2]钢铁研究总院高温材料研究所,北京100081

出　　处：《稀有金属材料与工程》2021年第4期1325-1333,共9页Rare Metal Materials and Engineering

摘　　要：采用电渣重熔连续定向凝固+3D整体锻造+等温模锻的新型铸&锻工艺制备了大尺寸GH4096合金篦齿盘锻件,研究了固溶后油冷和风冷2种冷却方式对锻件组织、性能及残余应力的影响。利用金相显微镜、扫描电镜和透射电镜分析了锻件的显微组织,测试了锻件的力学性能,对锻件进行了水浸分区聚焦超声波检测,开展了零件加工和试验考核。结果表明,2种固溶冷却方式的锻件经时效处理后的晶粒尺寸均为5~20μm,一次γ’相尺寸范围均为0.3~4.5μm。相比于固溶油冷+时效处理,固溶风冷+时效处理锻件中的二次和三次γ’相更粗、二次γ’相的含量更少,屈服强度和蠕变性能较低,但内部残余应力和机加工变形量更小。GH4096合金篦齿盘锻件经超声波检测未发现超过Φ0.4 mm-15 dB的单显信号,杂波水平在Φ0.4 mm-21dB以下。固溶风冷+时效处理的全尺寸篦齿盘零件通过了超转试验考核和破裂转速试验考核,试验结果满足设计的需求。The GH4096 alloy aero-engine labyrinth disk forging was prepared by a novel casting & wrought method which included electroslag remelting continuous directional solidification, multiple integral forging, die forging and other process. The effect of different cooling rate after solid solution treatment on the microstructure and properties of forgings was analyzed. Microstructure of forgings were analyzed by optical microscope(OM), scanning electron microscope(SEM) and transmission electron microscope(TEM). Mechanical properties of forgings were tested. Multi-zoned ultrasonic focused inspection was used to detect the quality of GH4096 alloy forgings. In addition, full-size labyrinth disks were manufactured and tested. The results show that two kinds of heat treated forgings possess the comparable grain size of 5~20 μm and primary γ’ size of 0.3~4.5 μm. Compared with oil cooling of solution treated forgings, the forced air cooling of solution treated forgings possess coarser secondary and thirdly γ’ phase, less secondary γ’ phase content, lower yield strength, lower creep property, but lower residual stress and machining deformation. There is no single reflected signal higher than that of Φ0.4 mm-15 dB, and the clutter signals are lower than Φ0.4 mm-21 dB. The forced air cooled solution + aging treated full-size GH4096 alloy labyrinth disk passes the over-running test and burst speed test.

关 键 词：GH4096合金 新型铸&锻工艺 显微组织 力学性能 残余应力 超声波检测 

分 类 号：TG132.33[一般工业技术—材料科学与工程] TG146.15[金属学及工艺—合金]