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A kind of zirconium-based six-element alloy brazing filler metal containing sn, hf and ni and using method

A technology of alloy brazing filler metal and brazing filler metal, which is applied in metal processing equipment, welding/cutting medium/material, welding equipment, etc., can solve problems such as insufficient strength of titanium alloy brazing joints with low phase transition point, and achieve lower temperature and higher Joint strength, the effect of high joint strength

Active Publication Date: 2022-08-09
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the Ti-Zr-Cu-Ni system solder containing a large amount of Zr elements, the liquidus temperature of a very small part of the solder is lower than 882 ° C, but due to the large content of Cu and Ni elements in the system, during the welding process The above two elements chemically react with Ti to form a hard phase, that is, Ti-Cu or Ti-Ni intermetallic compound, resulting in a brazed joint of pure titanium, or a heterogeneous combination of pure titanium and titanium alloy, or a titanium alloy with a low phase transition point. Insufficient strength
At present, there is still a lack of brazing materials that can braze pure titanium or pure titanium and titanium alloys at temperatures below 882 °C and have high-strength joints

Method used

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  • A kind of zirconium-based six-element alloy brazing filler metal containing sn, hf and ni and using method
  • A kind of zirconium-based six-element alloy brazing filler metal containing sn, hf and ni and using method
  • A kind of zirconium-based six-element alloy brazing filler metal containing sn, hf and ni and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] For the Zr-Ti-Ni-Nb-Sn-Hf six-element solder, the weight percentages of the solder components are: Ti: 12.8; Ni: 11.5; Nb: 8.0; Sn: 2.5; Hf: 0.5; the remainder is Zr. (1) Preparation of brazing material; (2) The matrix is ​​a combination of TA2-TA2 materials, and the quenched foil tape is cut into the desired shape, and it is fixed on one side of the TA2-TA2 material combination by resistance spot welding, and the brazing gap is 0.7 mm. (3) Put the assembled components into the vacuum brazing furnace, the vacuum degree in the furnace is 4 × 10-3Pa, the brazing temperature is selected as 875 °C, and the brazing process is set as follows: 40 °C / min to heat up to 500 °C → 25°C / min to heat up to 875°C→20°C / min→hold→25°C / min and cool down to room temperature with the furnace; the holding time is 10min.

Embodiment 2

[0052] For the Zr-Ti-Ni-Nb-Sn-Hf hexagonal solder, the weight percentages of the components are: Ti: 11.5; Ni: 11.1; Nb: 6.5; Sn: 4.0; Hf: 0.5; the remainder is Zr. (1) Preparation of brazing material; (2) The matrix is ​​a combination of TA2-TA18 materials, and the quenched foil tape is cut into the desired shape, and it is fixed on one side of the TA2-TA18 material combination by resistance spot welding, and the brazing gap is 0.65 mm. (3) Put the assembled components into the vacuum brazing furnace, and the vacuum degree in the furnace is 3.5×10 -3 Pa, the brazing temperature is selected as 878℃, and the brazing process is set as follows: 40℃ / min heating to 500℃→25℃ / min heating to 878℃→20℃ / min→holding→25℃ / min cooling to room temperature with the furnace ; The holding time is 15min.

Embodiment 3

[0054] For the Zr-Ti-Ni-Nb-Sn-Hf hexagonal solder, the weight percentages of the components are: Ti: 13.5; Ni: 12.8; Nb: 6.5; Sn: 2.8; Hf: 1.0; the remainder is Zr. (1) Preparation of brazing filler metal; (2) The substrate is a combination of TC4-TA18 materials, and the quenched foil tape is cut into the desired shape, and it is fixed on one side of the TC4-TA18 material combination by resistance spot welding, and the brazing gap is 0.9 mm. (3) Put the assembled components into the vacuum brazing furnace, and the vacuum degree in the furnace is 7.0×10 -3 Pa, the brazing temperature is selected as 890℃, and the brazing process is set as follows: 40℃ / min heating to 500℃→25℃ / min heating to 890℃→20℃ / min→holding→25℃ / min cooling to room temperature with the furnace ; The holding time is 20min.

[0055] After a lot of experiments, it is found that the numerical selection of parameters will have a great impact on the accuracy of the results. This application selects the preferred ...

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Abstract

The invention relates to the technical field of welding, and provides a zirconium-based hexagonal alloy brazing material containing Sn, Hf and Ni and a method for using the same. Among them, the weight percentage of a zirconium-based six-element alloy brazing filler metal containing Sn, Hf and Ni is: Ti: 12.3-13.8; Ni: 9.5-11.5; Nb: 5.5-8.0; Sn: 2.5-6.5; Hf: 0~1.5; Zr: margin. The brazing filler metal alloy of the invention has low liquidus temperature, few compound phases and dispersive distribution, high strength of the corresponding joint, and is suitable for brazing titanium material combinations containing pure titanium; the brazing filler metal satisfies the chemical composition and the base metal and has good compatibility , and the main component has a wide range, which can fully meet the requirements of the welding process for engineering implementation.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to a zirconium-based hexagonal alloy brazing filler metal containing Sn, Hf and Ni and a method for using the same. Background technique [0002] Titanium and its alloys have high specific strength and good corrosion resistance. Important chemical containers, bridge columns of sea-crossing bridges and anti-corrosion linings of super-large floating marine structures are almost all welded structures of titanium and heterogeneous materials, which can Improving material saving, improving structural efficiency and weight reduction, improving the corrosion resistance of connectors, reducing costs, etc., have obvious social and economic effects, and have broad application prospects. [0003] Compared with Ag-Cu solder that can be used for pure titanium and titanium alloy brazing, Ti-based or Ti-Zr-based solder has higher strength, corrosion resistance and heat resistance. Since the phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/32B23K1/008
CPCB23K35/32B23K1/008
Inventor 熊华平静永娟尚泳来
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS