线性摩擦焊接钛合金整体叶盘研制与实验研究  

Development and experimental study on linear friction welding titanium alloy blisk

作　　者：李祚军 田伟 张田仓 季亚娟 钟燕 LI Zuojun;TIAN Wei;ZHANG Tiancang;JI Yajuan;ZHONG Yan(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China;AVIC Manufacturing Technology Institute,Beijing 100024,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500 [2]中国航空制造技术研究院,北京100024

出　　处：《航空材料学报》2020年第4期71-76,共6页Journal of Aeronautical Materials

摘　　要：本研究以先进航空发动机压气机整体叶盘为应用对象,开展TC11/TC17异材线性摩擦焊接整体叶盘的研制与实验考核研究,分析焊接接头的显微组织,对比研究母材和焊接接头的拉伸性能及持久性能,完成了焊接叶片单元件的振动疲劳实验和焊接整体叶盘的超转实验及低循环疲劳实验。结果表明:TC11/TC17线性摩擦焊接接头由TC11母材区、TC11侧热力影响区、焊合区、TC17侧热力影响区和TC17母材区五个典型区域组成。焊接试样的拉伸强度与TC11母材基本相当,焊接试样的伸长率与TC17母材相当,断面收缩率与TC11母材相当;焊接接头的持久强度极限低于TC17母材但略高于TC11母材。三种焊缝位置的焊接叶片单元件的中值疲劳寿命分别为1.501×106次、0.344×106次和0.132×106次,疲劳裂纹未产生在叶片的焊缝处及热影响区;焊接整体叶盘通过了115%的超转实验和1000次低循环疲劳实验,实验结果满足要求。Taking the advanced aeroengine compressor blisk as the application object, the development and experimental study on the TC11/TC17 different materials linear friction welding integral blisk was carried out. The microstructure of welded joint was analyzed, the tensile and stress rupture properties of base metal and welded joint were compared, the vibration fatigue test on welded blade test pieces, and the overrunning test and low-cycle fatigue test on welding blisk were developed. The results show that the TC11/TC17 linear friction welding joint consists of five typical zones, they are TC11 base metal zone, TC11 thermal influence zone,weld zone, TC17 thermal influence zone and TC17 base metal zone. The tensile strength of the welded joint is basically equivalent to that of the TC11 base metal, elongation is equivalent to TC17 base metal;endurance strength lower than TC17 base metal, but less higher than TC11 base metal. The median fatigue life of welded blade test pieces with three weld positions is respectively 1.501 ×106, 0.344 × 106, and 0.132 × 106 cycles, the fatigue crack isn’t at welding seam and thermal influence zone. The welding blisk pass the 115% overrunning test and 1000 cycles low-cycle fatigue test, the experiment results meet the requirement.

关 键 词：线性摩擦焊 整体叶盘 组织性能 实验考核 航空发动机 

分 类 号：TG47[金属学及工艺—焊接]