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Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip

A brazing filler metal, titanium-based technology, applied in the direction of welding equipment, welding/cutting medium/material, welding medium, etc., can solve the adverse effects of intermetallic compound joint performance, titanium-based powder brazing filler metal can not meet the requirements of small structural parts and complex structures Problems such as the use of parts and low liquidus temperature, etc., to improve the assembly difficulty, superior brazing process, and improve the effect of band formation

Inactive Publication Date: 2012-05-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, there are still the following problems in the preparation of titanium-based solder: (1) titanium-based powder solder cannot meet the use of small structural parts and complex structural parts; (2) Ti-Cu-Ni, Ti-Zr- The eutectic composition of Cu and Ti-Zr-Cu-Ni solders has caused great disadvantages to the preparation of solders with different shapes. It is necessary to control the component content and obtain a lower liquidus temperature at the same time; (3) the metal in the solder Intercompounds adversely affect joint performance

Method used

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  • Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip
  • Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip
  • Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip

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preparation example Construction

[0030] The present invention also provides a preparation method of a titanium-based amorphous solder foil for brazing, comprising the following steps:

[0031] (1) weighing the above-mentioned raw materials according to the above-mentioned proportioning ratio to make batching;

[0032] (2) Put the ingredients into the crucible and smelt at least 3 times under high-purity argon to obtain the solder alloy ingot;

[0033] (3) After the solder alloy ingot is pulverized, it is packed into a quartz tube;

[0034] (4) After evacuating the vacuum in the furnace chamber to a high vacuum, fill it with high-purity argon;

[0035] (5) Turn on the power supply of the copper roller, and set the speed range to 20-80m / s;

[0036] (6) The quartz tube is heated, and the melt in the quartz tube is sprayed onto a high-speed rotating copper roller with high-purity argon gas, and a titanium-based amorphous solder foil strip is formed under rapid cooling conditions.

Embodiment 1

[0038] The invention provides a titanium-based amorphous solder foil strip for brazing. The percentages of its components and contents are: Ti: 40%, Zr: 35%, Cu: 13%, Ni: 9.0%, Co: 3.0%.

[0039] The preparation method of the above-mentioned titanium-based amorphous solder foil strip for brazing comprises the following steps:

[0040] (1) Ti, Zr, Cu, Ni and Co are weighed according to the above formula on an electronic balance to prepare ingredients, wherein the purity of Ti, Zr, Cu, Ni and Co is all greater than 99.99%.

[0041] (2) Put the above-mentioned ingredients into a magnetic levitation water-cooled crucible and repeatedly smelt 4 times. Among them, before melting, the inner vacuum of the magnetic levitation water-cooled crucible was evacuated to 2.0×10 -2 Pa, filled with high-purity argon to repeatedly wash the magnetic levitation water-cooled crucible 4 times, and then smelted 4 times under the protection of argon. In order to ensure uniform composition of the sme...

Embodiment 2

[0048] The invention provides a titanium-based amorphous solder foil strip for brazing. The percentages of its components and contents are: Ti: 44.5%, Zr: 30%, Cu: 10%, Ni: 15%, Co: 0.5%.

[0049] The preparation method of the above-mentioned titanium-based amorphous solder foil strip for brazing comprises the following steps:

[0050] (1) Ti, Zr, Cu, Ni and Co are weighed according to the above formula on an electronic balance to prepare ingredients, wherein the purity of Ti, Zr, Cu, Ni and Co is all greater than 99.99%.

[0051] (2) Put the above-mentioned ingredients into a magnetic levitation water-cooled crucible and repeatedly smelt 4 times. Among them, the vacuum in the crucible was evacuated to 2.0×10 before melting. -2 Pa, filled with high-purity argon to wash the crucible 5 times repeatedly, and then smelted under the protection of argon. In order to ensure uniform composition of the smelted solder, electromagnetic stirring is used and the alloy ingot is broken bef...

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Abstract

The invention provides a titanium-based amorphous brazing alloy foil strip for brazing and a preparation method for the foil strip. Components of the brazing alloy foil strip by percentage include 35-50% of Ti (titanium), 25-35% of Zr (zirconium), 10-24% of Cu (copper), 5-15% of Ni (nickel) and 0.5-8% of Co (cobalt). The method for preparing the brazing alloy foil strip includes the steps: weighing raw materials according to the proportion to prepare ingredients; placing the ingredients into a crucible and smelting the ingredients for at least three times in a high-purity argon state to obtain brazing alloy ingots; crushing the brazing alloy ingots and then placing the crushed brazing alloy ingots into a quartz tube; pumping a furnace chamber into high vacuum and then charging high-purity argon; turning on a copper roller power supply and setting the range of rotating speeds; and heating the quartz tube, spraying melts in the quartz tube onto a copper roller rotating at a high speed and forming the titanium-based amorphous brazing alloy foil strip under the condition of quenching. The brazing alloy foil strip has the advantages of surface brightness, uniformity of composition and the like, the negative effects of eutectic composition brazing alloy brittleness and over-high welding temperature on base metal can be avoided, and assembly and gap filling are easier when complex structural components are brazed.

Description

technical field [0001] The invention relates to a titanium-based material, in particular to a titanium-based amorphous solder foil for brazing and a preparation method thereof. Background technique [0002] With the increasing application of new materials such as titanium and titanium-based alloys, zirconium alloys, and functional ceramics in aerospace, brazing connections have shown outstanding advantages in the preparation of complex structural parts and precision parts. In the brazing process of these materials, titanium-based solder is widely used due to its advantages such as oxidation resistance, corrosion resistance, and good joint performance. At present, Ti-Cu-Ni, Ti-Zr-Cu, Ti-Zr-Ni, Ti-Zr-Be, Ti-Zr-Cu-Ni and other ternary and quaternary titanium-based solders have been formed. The chemical properties of titanium are active, and it can react with many elements under high temperature conditions to form brittle intermetallic compounds. Since titanium-based solder oft...

Claims

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Application Information

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IPC IPC(8): B23K35/32B23K35/40
Inventor 夏志东高勇
Owner BEIJING UNIV OF TECH
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