| Microstructure and strength of brazed joints of TiB2 cermet to TiAl-based alloys |
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| 作者姓名： | 李卓然 冯吉才 曹健 |
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| 作者单位： | StateKeyLaboratoryofAdvancedWeldingProductionTechnology.HarbinInstituteofTechnology,Harbin,150001 |
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| 基金项目： | NatureScienceFoundationofChina ( 5 0 175 0 2 1) |
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| 摘 要： | In this study, TiB2 cermet and TiAl-based alloy are vacuum brazed successfully by using Ag-Cu-Ti filler metal.The microstructural analyses indicate that two reaction products, Ti ( Cu, Al ) 2 and Ag bused solid solution ( Ag ( s. s ) ) , are present in the brazing seam, and the iuterface structure of the brazed joint is TiB2/TiB2 Ag ( s. s ) /Ag ( s. s ) Ti ( Cu,Al)2/Ti( Cu, Al)2/TiAl. The experimental results show that the shear strength of the brazed TiB2/TiAl joints decreases us thebrazing time increases at a definite brazing temperature. When the joint is brazed at 1 223 K for 5 min, a joint strength up to 173 MPa is achieved.
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| 关 键 词： | TiAl合金 TiB2 金属陶瓷 显微结构 强度 焊缝 焊接 |
Microstructure and strength of brazed joints of TiB2 cermet to TiAl-based alloys |
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| Li Zhuoran,Feng Jicai and Cao Jian,State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin,..Microstructure and strength of brazed joints of TiB2 cermet to TiAl-based alloys[J].China Welding,2003,12(1):17-19. |
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| Authors: | Li Zhuoran Feng Jicai and Cao Jian State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin |
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| Affiliation: | State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001 |
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| Abstract: | In this study, TiB 2 cermet and TiAl based alloy are vacuum brazed successfully by using Ag Cu Ti filler metal. The microstructural analyses indicate that two reaction products, Ti(Cu, Al) 2 and Ag based solid solution (Ag(s.s)), are present in the brazing seam, and the interface structure of the brazed joint is TiB 2/TiB 2+ Ag(s.s) /Ag(s.s)+Ti(Cu, Al) 2/Ti(Cu, Al) 2/TiAl. The experimental results show that the shear strength of the brazed TiB 2/TiAl joints decreases as the brazing time increases at a definite brazing temperature. When the joint is brazed at 1 223 K for 5 min , a joint strength up to 173 MPa is achieved. |
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| Keywords: | TiB 2 cermet TiAl vacuum brazing interface structure strength |
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