A kind of preparation method of ternary alloy sealing material

A technology of sealing materials and ternary alloys, which is applied in the field of sealing materials, can solve problems such as difficult mass production and coarse cast structure, and achieve the effects of reducing pollution, reducing grain fineness, and reducing hot-pressing processes

Active Publication Date: 2017-05-31
WUXI RIYUE ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the coarse and brittle as-cast structure of Ag-Cu-In alloy, it is difficult to realize mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The ternary alloy sealing material of the present invention, its components and the mass percentage of each component are: Ag: 60%; Cu: 30%; In: 10%; its specific preparation method is as follows:

[0015] (1) get the Ag that purity is 99.99%, the Cu tube that purity is 99.9% by proportioning, the In that purity is 99.99% is put into the copper tube that purity is 99.9%;

[0016] (2) Put the prepared raw materials into a vacuum intermediate frequency melting furnace, first evacuate to 0.02MPa, heat to 1100°C, and then fill with inert gas;

[0017] (3) keep warm for 20 minutes, fully stir through the intermediate frequency furnace, and pour;

[0018] (4) Put the poured ingot into a vacuum annealing furnace for annealing at a temperature of 600° C., holding time of 2 hours, and take it out of the annealing furnace after 60° C.;

[0019] (5) Anneal the cast ingot after rolling for 2mm, the temperature is 600°C, the holding time is 3h, filled with inert gas, and the strip ...

Embodiment 2

[0021] The ternary alloy sealing material of the present invention, its components and the mass percentage of each component are: Ag: 67%; Cu: 25%; In: 8%; its specific preparation method is as follows:

[0022] (1) get the Ag that purity is 99.99%, the Cu tube that purity is 99.9% by proportioning, the In that purity is 99.99% is put into the copper tube that purity is 99.9%;

[0023] (2) Put the prepared raw materials into a vacuum intermediate frequency melting furnace, first evacuate to 0.04MPa, heat to 1100°C, and then fill with inert gas;

[0024] (3) keep warm for 30 minutes, fully stir through the intermediate frequency furnace, and pour;

[0025] (4) Put the poured ingot into a vacuum annealing furnace for annealing at a temperature of 700° C., holding time of 5 hours, and take it out of the annealing furnace after 60° C.;

[0026] (5) Anneal the cast ingot after calendering for 1 mm at a temperature of 500° C., hold for 2 hours, fill in inert gas, and roll the strip...

Embodiment 3

[0028] The ternary alloy sealing material of the present invention, its components and the mass percentage of each component are: Ag: 63%; Cu: 28%; In: 9%; its specific preparation method is as follows:

[0029] (1) get the Ag that purity is 99.99%, the Cu tube that purity is 99.9% by proportioning, the In that purity is 99.99% is put into the copper tube that purity is 99.9%;

[0030] (2) Put the prepared raw materials into a vacuum intermediate frequency melting furnace, first evacuate to 0.04MPa, heat to 1100°C, and then fill with inert gas;

[0031] (3) keep warm for 20 minutes, fully stir through the intermediate frequency furnace, and pour;

[0032] (4) Put the poured ingot into a vacuum annealing furnace for annealing at a temperature of 650° C. and a holding time of 3 hours, and take it out of the annealing furnace after 60° C.;

[0033] (5) Anneal the cast ingot after rolling for 2mm, the temperature is 500°C, the holding time is 3h, filled with inert gas, and the st...

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PUM

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Abstract

The invention discloses a preparation method of a ternary alloy sealing material. The ternary alloy sealing material comprises, by mass, 60-67% of Ag, 25-30% of Cu and 8-12% of In. The preparation method comprises the steps that 99.99% Ag and a 99.9% Cu pipe are obtained, and 99.99% In is placed in the 99.9% Cu pipe; the raw materials are placed in a vacuum medium-frequency smelting furnace, vacuumization is performed till vacuum pressure reaches 0.02-0.04 MPa, and inert gas is input after temperature is increased to reach 1000-1100 DEG C; heat preservation is performed for 20-30 min, and sufficient stirring and casting are performed through the medium-frequency furnace; a cast ingot is laced in a vacuum annealing furnace for annealing, the temperature is 600-700 DEG C, the heat preservation time is 2-5 h, and the cast ingot is taken out after the temperature reaches 60 DEG C; and annealing is performed after the cast ingot is calendered by 1-2 mm, the temperature is 500-600 DEG C, heat preservation time is 2-3 h, inert gas is input, and the cast ingot is rolled to 0.1-0.12 mm after being cooled. The sealing material is high in cleanliness and good in welding performance.

Description

technical field [0001] The invention relates to a sealing material for a vacuum electron tube in the vacuum electronics industry, in particular to the preparation of a ternary alloy sealing material of Ag, Cu and In. Background technique [0002] In the vacuum tube sealing industry, due to the high frequency of use of vacuum tubes and the need to maintain a vacuum state, the requirements for sealing materials for vacuum tubes, especially ceramics and metals, and metals and metals are relatively high. At present, the most widely used solders are B-Ag72Cu and AgCuNi solders. Compared with B-Ag72Cu and AgCuNi solders, the soldering temperature of AgCu27-In12 solders is about 80-100°C lower. It can be used as vacuum brazing and grading for vacuum tube sealing. Brazing. And due to the addition of In, the solder also has good wettability to copper, nickel, steel and Kovar alloy, and has better welding performance and lower vapor pressure. However, because the as-cast structure o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/08C22C1/02C22F1/14
Inventor 熊兰兰
Owner WUXI RIYUE ALLOY MATERIALS
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