Novel antioxidant multielement alloy brazing filler metal

A multi-element alloy and anti-oxidation technology, which is applied in metal processing equipment, welding/cutting media/materials, welding media, etc., can solve problems affecting the appearance of vacuum tube welds, poor anti-oxidation performance of solder, and easy welding of weld surfaces. Oxidation and other problems, to achieve the effect of enhanced alloy strength, improved oxidation resistance, improved wettability and fluidity

Active 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

From the present many patents of low-silver alloy solders disclosed, although the welding mechanical properties and welding temperature of the solder prepared after reducing the silver content have basically reached the performance of Ag72Cu28 solder, the oxidation resistance of the solder is poor, and after welding The surface of the weld seam is easy to oxidize and appear macular phenomenon, which affects the appearance of the weld seam of the vacuum tube

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A novel anti-oxidation multi-element alloy solder, its preparation method is as follows: (each raw material consumption sees Table 1)

[0021] 1) Put the raw materials Ag, Cu, Ni, Si, Ge, Ce, Nd, Hf into the vacuum smelting furnace according to the ratio, after the vacuum degree in the furnace reaches 0.04Pa, then heat the furnace to 1300°C and keep it for 40 minutes. Ingots are made;

[0022] (2) The ingot obtained in step (1) is first stripped 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 1mm, it is coiled and placed at 600°C for 2 hours. 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 novel anti-oxidation multi-element alloy solder, its preparation method is as follows: (each raw material consumption sees Table 1)

[0026] 1) Put the raw materials Ag, Cu, Ni, Si, Ge, Ce, Nd, Hf into the vacuum smelting furnace according to the proportion, after the vacuum degree in the furnace reaches 0.2Pa, then heat the furnace to 1350°C and keep it warm for 35 minutes. Ingots are made;

[0027] (2) The ingot obtained in step (1) is first stripped 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 1.5mm, it is coiled and placed at 620°C for 1.5 hours. , then naturally cooled to room temperature, and the annealed strip was taken out;

[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 novel anti-oxidation multi-element alloy solder, its preparation method is as follows: (each raw material consumption sees Table 1)

[0031] 1) Put the raw materials Ag, Cu, Ni, Si, Ge, Ce, Nd, Hf into the vacuum smelting furnace according to the ratio, after the vacuum degree in the furnace reaches 0.4Pa, then heat the furnace to 1400°C and keep it warm for 30 minutes. Ingots are made;

[0032] (2) The ingot obtained in step (1) is first stripped 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 2mm, it is coiled and placed at 650°C for 1 to 2 minutes. hour, 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] Exampl...

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Abstract

The invention discloses novel antioxidant multielement alloy brazing filler metal. The brazing filler metal comprises the following elements in percentage by weight: 49-63.8% of Ag, 34-45% of Cu, 1-2%of Ni, 0.2-1.5% of Si, 0.5-1% of Ge, 0.2-0.5% of Ce, 0.2-0.5% of Nd, and 0.1-0.5% of Hf. The brazing filler metal is excellent in machinability, wettability, sealing joint strength and oxidation resistance, can replace traditional wide-used Ag72Cu28 brazing filler metal, is particularly suitable for sealing connection of ceramic and metal in electric vacuum devices, and also can be applied to 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 an anti-oxidation multi-element 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...

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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