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A kind of silver-based solder alloy and its preparation method, the preparation method of foil strip material and wire material

A silver-based solder and alloy technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of inconsistent melting point and high welding temperature of alloy solder, so as to ensure spattering and improve burnout rate , The effect of the process equipment is simple and easy to operate

Active Publication Date: 2021-12-24
KUNMING INST OF PRECIOUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of welding structural parts such as Kovar alloy, stainless steel and copper, the brazing filler metal omits the nickel plating process of Ag-28Cu alloy brazing filler metal; at the same time, the melting point of the brazing filler metal alloy is 760 ± 15°C, which is equivalent to that of Ag-28Cu. Solve the problem of high welding temperature and inconsistent melting point of Ag-28Cu-xNi (x=0.75, 1, 2, wt%) alloy solder

Method used

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  • A kind of silver-based solder alloy and its preparation method, the preparation method of foil strip material and wire material
  • A kind of silver-based solder alloy and its preparation method, the preparation method of foil strip material and wire material
  • A kind of silver-based solder alloy and its preparation method, the preparation method of foil strip material and wire material

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Effect test

Embodiment 1

[0049] 1) Using silver, oxygen-free copper, gallium, nickel, cobalt, gold, indium and ytterbium with a purity of 99.99% as raw materials, the components and mass percentages of the selected raw materials are: Cu, 27%; Ga, 4%; Ni , 0.05%; Co, 0.05%; Au, 0.02%; In, 0.5%; Yb, 0.02%; Wherein, the shape of the copper material should be a sheet, and the copper sheet is used to wrap all the indium. In addition, rare earth elements are added in the form of a master alloy by refining silver and ytterbium, which account for 30% of the total silver content. The preparation steps of the silver-ytterbium master alloy are as follows: successively put the silver accounting for 30% of the total silver and all the ytterbium raw materials into the medium-frequency induction melting furnace. Under the argon protective atmosphere with a pressure of 0.05MPa in the furnace, adjust the melting voltage to 30V, the current to 300A, and raise the temperature to the target heating temperature of 1200°C...

Embodiment 2

[0055] 1) Using silver, oxygen-free copper, gallium, nickel, iron, platinum, tin and samarium with a purity of 99.99% as raw materials, the components and mass percentages of the selected raw materials are: Cu, 26%; Ga, 5%; Ni , 0.05%; Fe, 0.02%; Pt, 0.02%; Sn, 0.5%; Sm, 0.02%; Among them, the shape of the copper material should be sheet, and the copper sheet is used to wrap all the tin. In addition, rare earth elements are added in the form of a master alloy by refining silver and samarium, which account for 35% of the total silver content. The preparation steps of the silver-samarium master alloy are as follows: successively put the silver accounting for 30% of the total silver and all the samarium raw materials into the medium-frequency induction melting furnace. Under an argon protective atmosphere with a pressure of 0.06MPa in the furnace, adjust the melting voltage to 35V, the current to 350A, and raise the temperature to the target heating temperature of 1300°C. After ...

Embodiment 3

[0061] 1) Using silver, oxygen-free copper, gallium, cobalt, iron, palladium, indium and europium with a purity of 99.99% as raw materials, the components and mass percentages of the selected raw materials are: Cu, 28%; Ga, 5%; Co , 0.1%; Fe, 0.05%; Pd, 0.02%; In, 0.5%; Eu, 0.02%; Wherein, the shape of the copper material should be a sheet, and the copper sheet is used to wrap all the indium. In addition, rare earth elements are added in the form of a master alloy by refining silver and europium, which account for 30% of the total silver content. The preparation steps of the silver-europium master alloy are as follows: successively put the silver accounting for 30% of the total silver and all the europium raw materials into the medium-frequency induction melting furnace. Under the protective atmosphere of argon gas with a pressure of 0.07MPa in the furnace, adjust the melting voltage to 25V, the current to 250A, and raise the temperature to the target heating temperature of 1...

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Abstract

The invention discloses a silver-based solder alloy, which comprises: Cu, 26-28%; Ga, 3.5-5.5%; at least two of the following elements: Ni, 0.001-0.5%; Co, 0.001- 0.5%; Fe, 0.001-0.5%; at least one of the following elements: Au, 0.001-0.5%; Pt, 0.001-0.5%; Pd, 0.001-0.5%; at least one of the following elements: In, 0.001-0.5% %; Sn, 0.001-0.5%; at least one of the following elements: La, Ce, Pr, Nd, Sm, Eu, Er, Yb, Y and Sc; the balance is Ag. The invention further provides a preparation method of silver-based solder alloy and a preparation method of foil strip and wire. The silver-based solder alloy of the present invention saves the nickel-plating process in welding vacuum electronic devices, preventing it from polluting the environment; at the same time, it solves the problems that the welding temperature of the Ag-28Cu-xNi alloy is high and the melting point is inconsistent; the solder The material alloy brazing process is good, has good wettability, the brazing rate of Kovar alloy, stainless steel, etc. is higher than 95%, and the shear strength of the brazed joint is σ b ≥285MPa.

Description

technical field [0001] The invention belongs to the technical field of brazing materials, and in particular relates to a silver-based brazing material alloy and a preparation method thereof, as well as a preparation method of foil strips and wires, which are used for welding components of vacuum electronic devices. Background technique [0002] Compared with other vacuum solders for vacuum electronic devices, silver-based solders have become the most widely used brazing materials in production and application due to their extremely high cost performance and unparalleled advantages, and have also become widely recognized as a suitable vacuum solder. Excellent material for electronic sealing. Silver-based solder has a moderate melting point, good manufacturability, good airtightness of welded joints, and good strength, toughness, electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in electronics, electrical engineering, electrical applianc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40B23K35/14
CPCB23K35/3006B23K35/0227B23K35/0233B23K35/40
Inventor 方继恒谢明陈永泰马洪伟杨有才张吉明胡洁琼王松
Owner KUNMING INST OF PRECIOUS METALS
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