| 摘要: |
| 采用自制镍基钎料进行了K465镍基高温合金叶片模拟件的真空电子束钎焊,研究了开贯通槽(磨掉全部裂纹)和开非贯通槽(磨掉80%~90%裂纹)的两种开槽方式对叶片模拟件接头产生裂纹的影响,分析发现开贯通槽试件很少产生裂纹而开非贯通槽试件都产生裂纹.借助扫描电镜(SEM)、能谱分析(EDS)和X射线衍射分析(XRD)等方法分析了接头界面结构,确定了界面反应产物及其形态分布.结果表明,在界面反应层中生成镍基γ固溶体,Ni2Si,Ni3B,Ni3Al和Ni3Si五种产物. |
| 关键词: 电子束钎焊 镍基高温合金 叶片 界面产物 |
| DOI： |
| 分类号: |
| 基金项目:哈尔滨工业大学优秀团队支持计划资助项目 |
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| Electron beam brazing repair of K465 Ni-base superalloy blades |
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WANG Gang1, CHEN Guoqing1, ZHANG Binggang1, FENG Jicai1, LIU Chenglai2
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1.State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China;2.AVIC Shenyang Liming Aero Engine(Group)Limited Corporation, Shenyang 110043, China
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| Abstract: |
| The vacuum electron beam brazing(VEBB) of K465 Ni-base superalloys blades with self-made filler metal was studied.Effects of through slot(grinding off all the cracks) and non-through slot(grinding off 80% to 90% the cracks) on the cracks of joints were investigated.It's discovered very few through slot specimens have cracks and all non-through specimens have cracks.Microstructure of the brazed joints with self-made filler metal was studied by means of scanning electron microscopy(SEM),energy disperse spectrum(EDS) and X ray diffraction(XRD).The results show that the structure of brazing seam consists of Ni-base γ solid solution,Ni2Si,Ni3B,Ni3Al and Ni3Si. |
| Key words: electron beam brazing Ni-base superalloy blades interfacial reaction product |
