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High-entropy alloy brazing filler metal for welding TA2 and 0Cr18Ni9Ti and preparation method thereof

A high-entropy alloy and brazing material technology, applied in welding equipment, welding/cutting medium/material, welding medium, etc., can solve the problems such as the corrosion resistance of the brazing seam can not meet the use requirements, the performance is not ideal, and the joint performance is difficult to guarantee. , to achieve the effect of easy promotion, easy operation and high comprehensive mechanical properties

Inactive Publication Date: 2009-12-02
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unsatisfactory properties of the existing brazing alloys, the hard and brittle intermetallic compound phases often appear in the brazing seam, which makes it difficult to guarantee the performance of the joint, and the corrosion resistance of the brazing seam often cannot meet the requirements of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Select the element content of each component according to the data of Example 1 in Table 1, and implement according to the following steps:

[0032] Step A, using an ultra-high vacuum electric arc furnace to melt the master alloy:

[0033] A1. Weigh various high-purity metals according to the following atomic percentages: the total percentage is 100%, of which Ti25%, Cu25%, Ni20%, Fe15%, Cr10%, Sn4.98%, In0.01%, Ga0. 01%, In and Ga are collectively referred to as trace elements, and the purity of various high-purity metals is higher than 99.99%, see Table 1; then use boric anhydride to purify the weighed high-purity metals respectively;

[0034] A2, the high-purity metals purified in step A1 are respectively melted according to the combination of Cu-Sn, Cu-Ni, Ti-Fe, Fe-Cr-trace elements to obtain four groups of master alloys;

[0035] A3, the four groups of master alloys obtained in step A2 are combined together according to Cu-Sn and Cu-Ni, Ti-Fe and Fe-Cr-trace elem...

Embodiment 2

[0039] Embodiment 2: According to the steps of the above-mentioned embodiment 1, select the elements and contents of each component according to the data of embodiment 2 in Table 1, and control the surface speed of the roller at 12m / s, can prepare a thick about 55mm, a width of about 5mm , An amorphous high-entropy alloy brazing filler metal foil about 1m long. Using the high-entropy alloy brazing material foil, TA2 and 0Cr18Ni9Ti are subjected to high-frequency induction brazing, and the tensile and shear strength of the brazed joint is about 221.7MPa.

Embodiment 3

[0040] Embodiment 3: According to the steps of the above-mentioned embodiment 1, select the elements and contents of each component according to the data of embodiment 3 in Table 1, and control the surface speed of the roll surface at 15m / s, can prepare a thick about 45mm, a width of about 4mm , An amorphous high-entropy alloy brazing filler metal foil about 1m long. The high-entropy alloy brazing filler metal foil was used to perform high-frequency induction brazing of TA2 and 0Cr18Ni9Ti, and the tensile and shear strength of the brazed joint was about 195MPa.

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Abstract

The invention discloses a high-entropy alloy brazing filler metal for welding TA2 and 0Cr18Ni9Ti. The brazing filler metal comprises the following compositions according to atomic percentage: 20 to 25 percent of Ti, 25 to 30 percent of Cu, 20 to 25 percent of Ni, 15 to 20 percent of Fe, 10 to 13 percent of Cr, 0.5 to 5 percent of Sn, 0.01 to 2 percent of In, and 0.01 to 2 percent of Ga. The invention also discloses a method for preparing a high-entropy alloy brazing filler metal foil, which comprises the following steps: smelting the compositions to obtain high-entropy master alloy in steps by a super-high vacuum arc furnace; and controlling the linear speed of a roller at 5 to 40m / s by a single roller rapid setting device to obtain the high-entropy alloy brazing filler metal foil. The high-entropy alloy brazing filler metal has good flexibility, and is convenient for processing and assembling; and in welding, the high-entropy alloy brazing filler metal has good matching property with welded metal and alloy, brazing seams have excellent corrosion resistance and are single-phase fcc solid solution tissues, and joints have high comprehensive mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a high-entropy alloy solder for welding TA2 and 0Cr18Ni9Ti, and also relates to a preparation method of the high-entropy alloy solder. Background technique [0002] Titanium and its alloys have high specific strength and good corrosion resistance, and are important aerospace structural materials and chemical materials. However, due to the high price of titanium metal, titanium-steel dissimilar metal structures are commonly used in engineering, which can not only meet the performance requirements, but also save titanium materials. The key to manufacturing titanium-steel composite structures is to solve the welding problem between titanium and steel. [0003] Due to the large difference in linear expansion coefficient and thermal conductivity between titanium and steel, a large internal stress is easily formed in the welded joint; the content of iron in the weld will greatl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K35/40C22C45/00C22C1/03B22D11/06
Inventor 翟秋亚陈凯徐锦锋
Owner XIAN UNIV OF TECH
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