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Alloy brazing filler metal for vacuum sealing and connection

A technology of alloy solder and vacuum, which is applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve problems such as difficult to meet the requirements, achieve the effect of improving processing performance and preventing CuIn brittle mesophase

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

The melting point of Ag72Cu28 solder is 779°C, which is difficult to meet the requirements for low melting point solder in graded sealing

Method used

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  • Alloy brazing filler metal for vacuum sealing and connection
  • Alloy brazing filler metal for vacuum sealing and connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of alloy solder for vacuum sealing, each metal element composition is as shown in table 1, and its preparation method comprises the steps:

[0021] (1) put the purity 99.99% Ag and the purity 99.9% Cu, In, Ce into the vacuum smelting furnace according to the ratio, after the vacuum degree in the furnace is evacuated to 0.02Pa, the furnace is heated to 1200°C, kept for 30 minutes, and The alloy liquid is cast into the setting mold;

[0022] (2) Carry out vacuum annealing to the ingot after casting, the annealing temperature is 500 ℃, heat preservation 3h, naturally cool to room temperature and take out;

[0023] (3) Cold-roll the 5mm strip of the ingot after the annealing treatment in step (2), and then anneal at a temperature of 600° C. for a holding time of 2 hours, fill in an inert gas, and naturally cool to room temperature and take it out;

[0024] (4) Continue rolling the strip after the annealing treatment in step (3) to 2mm, anneal it at a temperature of ...

Embodiment 2

[0026] A kind of alloy solder for vacuum sealing, each metal element composition is as shown in table 1, and its preparation method comprises the steps:

[0027] (1) put the purity 99.99% Ag and the purity 99.9% Cu, In, Ce into the vacuum smelting furnace according to the ratio, after the vacuum degree in the furnace is evacuated to 0.04Pa, the furnace is heated to 1250°C and kept for 35 minutes. The alloy liquid is cast into the setting mold;

[0028] (2) Carry out vacuum annealing to the ingot after casting, the annealing temperature is 520 ℃, heat preservation 3.5h, naturally cool to room temperature and take out;

[0029] (3) Cold-roll the 5mm strip of the ingot after the annealing treatment in step (2), and then anneal at a temperature of 600° C. to 630° C. for a holding time of 2.5 hours, fill it with an inert gas, and naturally cool to room temperature and take it out;

[0030] (4) Continue rolling the strip after the annealing treatment in step (3) to 2mm, anneal at a...

Embodiment 3

[0032] A kind of alloy solder for vacuum sealing, each metal element composition is as shown in table 1, and its preparation method comprises the steps:

[0033] (1) Put the purity of 99.99% Ag and the purity of 99.9% Cu, In and Ce into the vacuum smelting furnace according to the ratio. After the vacuum degree in the furnace is evacuated to 0.4Pa, the furnace is heated to 1300 ° C and kept for 40 minutes. The alloy liquid is cast into the setting mold;

[0034] (2) Carry out vacuum annealing to the ingot after casting, the annealing temperature is 550 ℃, heat preservation 4h, naturally cool to room temperature and take out;

[0035] (3) Cold-roll the 6mm strip of the cast ingot after the annealing treatment in step (2), then anneal at a temperature of 650° C., hold for 3 hours, fill in an inert gas, and take it out after naturally cooling to room temperature;

[0036] (4) Continue rolling the strip after the annealing treatment in step (3) to 3mm, anneal at a temperature of ...

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Abstract

The invention discloses an alloy brazing filler metal for vacuum sealing and connection. Metal elements of the alloy brazing filler metal comprise, by mass percentage, 54.4-64.8% of Ag, 28-36% of Cu,7-9% of In and 0.2-0.6% of Ce. The prepared alloy brazing filler metal is low in fusion point, high in cleanliness and tensile strength and good in oxidation resistance.

Description

technical field [0001] The invention relates to a sealing material for a vacuum electron tube in the vacuum electronics industry, in particular to a quaternary alloy solder of Ag, Cu, In, and Ce. Background technique [0002] In the vacuum tube sealing industry, silver-based alloy solder is widely used due to its excellent mechanical properties and airtightness, such as Ag72Cu28 and AgCuNi solder. Ag72Cu28 solder has a melting point of 779°C, which is difficult to meet the requirements for low melting point solder in graded sealing. In element can be used as an additive element to reduce the melting point of the alloy. At the same time, the In-containing solder has good wettability to copper, nickel, stainless steel and Kovar alloy, and has good welding performance and low vapor pressure. The CuIn phase is easy to form in the AgCuIn ternary alloy, and the intermediate phase is brittle, which leads to cracks on the strip surface of the alloy during rolling. Contents of the...

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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