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Quaternary alloy brazing filler metal

A quaternary alloy and brazing material technology, which is applied in metal processing equipment, welding/cutting media/materials, welding media, etc., can solve the problems of high brazing price and consumption of precious metal silver, etc., and achieve improved wettability and fluidity , high-strength effect

Inactive Publication Date: 2019-01-11
WUXI RIYUE ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, Ag72Cu28 solder is widely used in the welding and sealing of electric vacuum devices such as vacuum switch tubes, launch tubes, microwave devices, etc., and is the preferred solder in the electric vacuum industry; however, the silver content of Ag72Cu28 solder is as high as 72%. The solder with high silver content is not only expensive, but also consumes a large amount of precious metal silver. Therefore, how to reduce the silver content of the Ag72Cu28 solder without changing the important properties of the solder, such as manufacturability, processability and brazing temperature An urgent problem to be solved in electric vacuum industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of quaternary alloy brazing filler metal, its preparation method comprises the steps: (element ratio as shown in Table 1)

[0021] (1) Put the raw materials Ag, Cu, Ni, and Si into the vacuum melting furnace according to the ratio. After the vacuum degree in the furnace reaches 0.04Pa, the furnace is heated to 1200 ° C and kept for 30 minutes to obtain an ingot;

[0022] (2) Peel the ingot obtained in step (1) first, peel off the dirt and oxide layer on the surface of the ingot, and then carry out cold rolling in a rolling mill. When the thickness reaches 2mm, coil it and place it at 550°C for 2 hours, and then Naturally cool to room temperature, take out the strip after annealing;

[0023] (3) Continue to cold-roll the strip after the annealing treatment in step (2) to a thickness of 0.04 mm, then cut it into strips of a certain width and punch out the desired shape.

Embodiment 2

[0025] A kind of quaternary alloy brazing filler metal, its preparation method comprises the steps: (element ratio as shown in Table 1)

[0026] (1) put raw material Ag, Cu, Ni, Si into the vacuum smelting furnace according to the proportion, after the vacuum degree in the furnace reaches 0.2Pa, then heat the furnace to 1250°C, keep the temperature for 35 minutes, and make the ingot;

[0027] (2) The ingot obtained in step (1) is first peeled off to remove the dirt and oxide layer on the surface of the ingot, and then cold rolled in a rolling mill. When the thickness reaches 2.5mm, it is coiled and placed at 600°C for 2.5 hours. Then naturally cool to room temperature, take out the strip after annealing;

[0028] (3) Continue to cold-roll the strip after the annealing treatment in step (2) to a thickness of 0.1 mm, and then cut it into strips of a certain width and punch out the desired shape.

Embodiment 3

[0030] A kind of quaternary alloy brazing filler metal, its preparation method comprises the steps: (element ratio as shown in Table 1)

[0031] (1) put raw materials Ag, Cu, Ni, Si into the vacuum smelting furnace according to the proportioning, after the vacuum degree in the furnace reaches 0.4Pa, then heat the furnace to 1300°C, keep the temperature for 40 minutes, and make the ingot;

[0032] (2) The ingot obtained in step (1) is first peeled by car to remove the dirt and oxide layer on the surface of the ingot, and then cold rolled in a rolling mill. When the thickness reaches 3mm, it is coiled and placed at 650 ° C for 3 hours, and then Naturally cool to room temperature, take out the strip after annealing;

[0033] (3) Continue to cold-roll the strip after the annealing treatment in step (2) to a thickness of 0.15 mm, then cut it into strips of a certain width and punch out the desired shape.

[0034] Table 1 (unit: weight %)

[0035] Example

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Abstract

The invention discloses quaternary alloy brazing filler metal. The quaternary alloy brazing filler metal is characterized in that the brazing filler metal comprises, by mass, 50-65% of Ag, 33.8-45% ofCu, 1-3% of Ni and 0.2-2% of Si. The brazing filler metal has good machinability and wettability, high strength of a sealing joint and good oxidation resistance; Ag72Cu28 brazing filler metal which is widely used at present can be replaced by the quaternary alloy brazing filler metal, and the quaternary alloy brazing filler metal is particularly suitable for sealing of ceramics and metal in electric vacuum devices and can also be used for vacuum brazing and gas shielded brazing in other fields.

Description

technical field [0001] The invention relates to the technical field of welding and multi-element alloy materials, in particular to a quaternary alloy solder used for sealing electric vacuum devices. Background technique [0002] With the rapid development of information technology, aerospace technology and electric vacuum technology, brazing is widely used in the connection of complex and precise structural components due to its unique properties. Vacuum electron tubes, an important component in electric vacuum packaging technology, require high vacuum, good airtightness, and good mechanical properties, so the requirements for solder for vacuum electron tube sealing are relatively high. Silver-based solder has good mechanical properties, good electrical conductivity, good corrosion resistance, and good airtightness of welded joints, and is recognized as an excellent vacuum electronic sealing material. [0003] The brazing temperature of Ag72Cu28 solder is moderate (about 80...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K35/14
CPCB23K35/0222B23K35/3006B23K35/40
Inventor 晏弘
Owner WUXI RIYUE ALLOY MATERIALS
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