In order to research the influence of Zr content （ below 15 wt. % ） on the properties of the filler metal. Ti-5Zr- 15Cu-15Ni-La, Ti-lOZr-15Cu-15Ni-La and Ti-15Zr-15Cu-15Ni-La filler metals were prepared. The wettabi...In order to research the influence of Zr content （ below 15 wt. % ） on the properties of the filler metal. Ti-5Zr- 15Cu-15Ni-La, Ti-lOZr-15Cu-15Ni-La and Ti-15Zr-15Cu-15Ni-La filler metals were prepared. The wettability of the filler metals on Ti-6Al-4V was evaluated and the melting temperatures of the filler metals were tested by differential scanning calorimetry （DSC）. The microstructures and mechanical properties of the brazed joints were investigated. The results show that the wettability of the filler metals improves as the Zr content increases. Zr content has great influence on the melting temperature of the filler metals. When Zr content changes from 5 wt. % to 10 wt. % and 15 wt. % , the melting temperature decreases about 80 ℃. The brazed joint with Ti-5Zr-15Cu-15Ni-La filler metal shows aciculate phase on the interfizce. The brazed joints with Ti-lOZr-15Cu-15Ni-La and Ti-15Zr-15Cu-15Ni-La filler metals consist of three zones, a segregated center zonc, diffusion reaction zone and acicular zone. The brazed joint with Ti-5Zr-15Cu-15Ni-La filler metal achieves the maximum shear strength 313.9 MPa.展开更多
文摘In order to research the influence of Zr content （ below 15 wt. % ） on the properties of the filler metal. Ti-5Zr- 15Cu-15Ni-La, Ti-lOZr-15Cu-15Ni-La and Ti-15Zr-15Cu-15Ni-La filler metals were prepared. The wettability of the filler metals on Ti-6Al-4V was evaluated and the melting temperatures of the filler metals were tested by differential scanning calorimetry （DSC）. The microstructures and mechanical properties of the brazed joints were investigated. The results show that the wettability of the filler metals improves as the Zr content increases. Zr content has great influence on the melting temperature of the filler metals. When Zr content changes from 5 wt. % to 10 wt. % and 15 wt. % , the melting temperature decreases about 80 ℃. The brazed joint with Ti-5Zr-15Cu-15Ni-La filler metal shows aciculate phase on the interfizce. The brazed joints with Ti-lOZr-15Cu-15Ni-La and Ti-15Zr-15Cu-15Ni-La filler metals consist of three zones, a segregated center zonc, diffusion reaction zone and acicular zone. The brazed joint with Ti-5Zr-15Cu-15Ni-La filler metal achieves the maximum shear strength 313.9 MPa.
