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Active core silver solder for soldering ceramics and preparation method thereof

A technology of silver solder and activity, applied in the field of active core silver solder for brazing ceramics and its preparation, can solve the problems affecting the performance of ceramic brazing joints, difficult extrusion, drawing, rolling, and affecting the application of active solder, etc. problems, to achieve the effect of increasing competitiveness, reducing hot cracks, and low extrusion pressure

Inactive Publication Date: 2013-06-05
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly because the Ti element is easy to react with most metals to form brittle intermetallic compounds, which makes the solder brittle. Studies have shown that in the Ag-Cu-Ti active solder, when the Ti content exceeds 6wt%, it is difficult to squeeze and pull. drawing, rolling
At present, most of the active brazing materials for ceramic connection in China use simple metal powder, which is prepared according to a certain mass fraction, mixed by ball milling or other methods, and then brazed ceramics. This method is difficult to mix the simple powder evenly, which affects ceramic brazing. The performance of the joint
Other forms of solder such as filamentary and flake active solder are mostly imported from Germany or Japan. Due to poor procurement channels and high prices of imported products, the application of active solder is affected.

Method used

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  • Active core silver solder for soldering ceramics and preparation method thereof
  • Active core silver solder for soldering ceramics and preparation method thereof
  • Active core silver solder for soldering ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, see figure 1 :

[0022] A Preparation of active alloy wire: Prepare 0.099kg of Ti and 0.001kg of Zr; through smelting, casting, rolling, swaging, and drawing, a TiZr active alloy wire (8) with a diameter of ψ=1mm is formed. Put it into the wire feeding mechanism (2), and fix one end on the wire winding frame (5).

[0023] Turn on the heating device on the extrusion barrel (1) to make the extrusion temperature reach 725±2°C, and turn on the cooling device (6) at the extrusion nozzle.

[0024] Replace the extrusion nozzle (4) on the extrusion barrel with an extrusion nozzle with a diameter of Ф3mm at the wire outlet.

[0025] B Prepare 1.134kg of Ag, 0.447kg of Cu, and 0.137kg of Ge, smelt them into a semi-molten silver alloy (7), pour them into the extrusion cylinder (1) at a temperature of 725°C, and keep it warm for 2 minutes.

[0026] C extrudes the semi-molten silver alloy (7) with an extrusion force of 900kN, and at the same time starts the winding fra...

Embodiment 2

[0029] Example 2, see figure 1 :

[0030] A Preparation of active alloy wire: prepare 0.098kg of Ti and 0.002kg of Zr; obtain TiZr active alloy wire (8) with ψ=1.2mm after melting, casting, rolling, swaging and drawing. Put it into the wire feeding mechanism (2), and fix one end on the wire winding frame (5).

[0031] Turn on the heating device on the extrusion barrel (1) to make the extrusion temperature reach 750±2°C, and turn on the cooling device (6) at the extrusion nozzle.

[0032] Replace the extrusion nozzle (4) on the extrusion cylinder with an extrusion nozzle with a diameter of Ф3.5mm at the wire outlet.

[0033] B prepares 1.179kg of Ag, 0.458kg of Cu, and 0.017kg of Ge, melts them into a semi-molten silver alloy (7), pours them into the extruding cylinder (1) at a temperature of 750°C, and keeps it warm for 2 minutes.

[0034] C extrudes the semi-molten silver alloy (7) with an extrusion force of 700kN, and at the same time starts the winding frame (5), pulls t...

Embodiment 3

[0037] Example 3, see figure 1 :

[0038] A Preparation of active alloy wire: prepare 0.0969kg of Ti, 0.0001kg of Zr, and 0.003kg of Hf; obtain TiZrHf active alloy wire (8) with ψ=1mm after melting, casting, rolling, swaging and drawing. Put it into the wire feeding mechanism (2), and fix one end on the wire winding frame (5).

[0039] Turn on the heating device on the extrusion barrel (1) to make the extrusion temperature reach 755±2°C, and turn on the cooling device (6) at the extrusion nozzle.

[0040] Replace the extrusion nozzle (4) on the extrusion barrel with an extrusion nozzle with a diameter of Ф3mm at the wire outlet.

[0041] B prepares 1.105kg of Ag, 0.430kg of Cu, and 0.031kg of Ge, melts them into a semi-molten silver alloy (7), pours them into the extrusion barrel (1) at a temperature of 755°C, and keeps it warm for 2 minutes.

[0042] C extrudes the semi-molten silver alloy (7) with an extrusion force of 900kN, and at the same time starts the winding frame ...

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Abstract

The invention relates to an active core silver solder for soldering ceramics and a preparation method thereof, and the active core silver solder comprises two parts, namely a core part and an outer layer, wherein the core part is composed of an active alloy containing active elements and the outer layer is composed of a silver alloy. The active core silver solder comprises the following main components by weight percent: 2-6% of the active alloy comprising three elements, namely Ti, Zr and Hf, wherein the active alloy contains 0.1-5wt% of the Zr, 0-3wt% of the Hr and the balance of the Ti; and 94-98% of the silver alloy comprising the elements of Ag, Cu and Ge, wherein the silver alloy contains 66-72wt% of the Ag, 26-27.9wt% of the Cu and 0.1-8wt% of the Ge. The threadlike active core silver solder can be directly obtained by adopting a method of wrapping an active core at the interior by extrusion through semi-molten metal. Compared with the characteristic of low melting point of thesolder of domestic like products, the preparation process is high in production efficiency and a new way is opened for manufacturing the solder which is difficult to machine and form due to brittle intermetallic compounding.

Description

technical field [0001] The invention relates to an active-core silver solder for brazing ceramics and a preparation method thereof, which is mainly used for brazing connection of ceramics and composite materials thereof, and belongs to the field of brazing materials and their manufacture. Background technique [0002] Ceramic materials play an important role in modern industry and high-tech fields. It has a series of excellent properties such as high temperature resistance, oxidation resistance, corrosion resistance and wear resistance, and has excellent electrical insulation performance and chemical stability. It is widely used in cutting-edge industries such as ceramic engines, magnetic fluid power generation and nuclear reactors, and vacuum electronic devices. and other electronic fields. [0003] In practical applications, because ceramic materials are brittle and difficult to form, it is usually necessary to connect ceramics and metals. Brazing is one of the methods fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
Inventor 薛行雁龙伟民裴夤崟于新泉张雷潘建军马力程亚芳黄俊兰赵建昌齐剑钊
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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