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Copper-based interlayer alloy and preparation method thereof, and composite connecting piece of ceramic and oxygen-free copper and welding method thereof

A welding method and intermediate layer technology, applied in the field of materials, can solve the problem of high brazing cost and achieve the effects of improving oxidation resistance, firm sealing and good wetting

Active Publication Date: 2021-10-22
CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the brazing process of copper and ceramics, the most widely used active solder is Ag-based solder, which is a relatively mature active solder. However, silver is a rare and precious metal, a national control material, and the use of silver solder made of it will cause The cost of brazing is too high, so it is necessary to develop some non-silver-based solders to weld ceramics and metals, which can not only improve economic benefits, but also improve social benefits

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  • Copper-based interlayer alloy and preparation method thereof, and composite connecting piece of ceramic and oxygen-free copper and welding method thereof
  • Copper-based interlayer alloy and preparation method thereof, and composite connecting piece of ceramic and oxygen-free copper and welding method thereof
  • Copper-based interlayer alloy and preparation method thereof, and composite connecting piece of ceramic and oxygen-free copper and welding method thereof

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preparation example Construction

[0038] The preparation method of the above-mentioned copper-based interlayer alloy provided in the embodiment of the present invention includes:

[0039] According to the target chemical component content, Ti, Sn, Ni, Ag, B, Al, La and Cu are mixed and smelted to form an alloy material.

[0040] specifically:

[0041] 1. If it is prepared as powdery material, its preparation method is:

[0042] Ti, Sn, Ni, Ag, B, Al, La and Cu are mixed and then vacuum smelted, gas atomized and ultrasonically sieved to obtain a powder material with a particle size of 200-800 mesh.

[0043] 2. If it is prepared as a strip material, its preparation method is:

[0044] Mix Ti, Sn, Ni, Ag, B, Al, La and Cu to make alloy ingot by vacuum melting;

[0045] The alloy ingot is made into a strip material through a rapid quenching process.

[0046] Preferably, the strip-shaped material has a thickness of 60 μm-150 μm and a width of 10-110 mm.

[0047] The embodiment of the present invention provides a...

Embodiment 1

[0052] A copper-based intermediate layer material is composed of the following components in weight percentage: 23% Ti, 10% Sn, 3.5% Ni, 0.8% Ag, 0.2% B, 0.3% Al, 0.1% La and the balance of copper.

[0053] The preparation method of the flaky copper-based intermediate layer material comprises the following steps: mixing Ti, Sn, Ni, Ag, B, Al, La, Cu in proportion, first adopting vacuum melting, adopting vacuum melting and gas atomization, ultrasonic Sieve and make the middle layer material into 400 mesh spherical powder. Its microscopic appearance is as figure 1 shown.

[0054] The prepared copper-based intermediate layer powder material is used to directly braze alumina ceramics and 1A95 oxygen-free copper. The welding process parameters are as follows: the welding temperature parameter is set to 900 ° C, the pressure parameter is set to 0.1 MPa, and the holding time parameter is 10min.

[0055] The microstructure of the weldment obtained by welding is shown in image 3 s...

Embodiment 2

[0057] A copper-based intermediate layer material is composed of the following components by weight percentage: 22.5% Ti, 10.5% Sn, 4.0% Ni, 1.0% Ag, 0.3% B, 0.2% Al, 0.15% La and the balance of copper.

[0058] The preparation method of the flaky copper-based intermediate layer material comprises the following steps: mixing Ti, Sn, Ni, Ag, B, Al, La, Cu in proportion, first adopting vacuum melting to melt it into an alloy ingot. The preparation method of the sheet-shaped copper-based intermediate layer material comprises the following steps: cutting the smelted alloy ingot into alloy strips by wire cutting and mechanical cutting processes, and subjecting the cut alloy strips to sandblasting surface treatment , remove the surface oil, and then the alloy strip after sand blasting is cleaned by alcohol and acetone ultrasonically to remove the surface oil, and the cleaned alloy strip is quickly quenched to make the middle layer material into a strip with a thickness of 60 μm and a...

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Abstract

The invention relates to the technical field of materials, and discloses a copper-based interlayer alloy and a preparation method thereof, and a composite connecting piece of ceramic and oxygen-free copper and a welding method thereof. The copper-based interlayer alloy comprises the following chemical components in percentage by weight: 22.5-23.5% of Ti, 9.5-10.5% of Sn, 3.5-4.5% of Ni, 0.5-1.0% of Ag, 0.1-0.5% of B, 0.1-0.5 % of Al, 0.01-0.2% of La and the balance of copper. The preparation method of the copper-based interlayer alloy comprises the step that elements are mixed and smelted into an alloy material. According to the welding method of the ceramic and the oxygen-free copper, the copper-based interlayer alloy is adopted for welding an aluminum oxide ceramic base material and an oxygen-free copper base material. The composite connecting piece of the ceramic and the oxygen-free copper is obtained by adopting the welding method. The copper-based interlayer material can be suitable for a direct brazing process, and the performance of a welded joint is good.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a copper-based interlayer alloy and a preparation method thereof, a composite connector of ceramics and oxygen-free copper and a welding method thereof. Background technique [0002] al 2 o 3 Ceramics have excellent wear resistance, high temperature resistance, high strength, corrosion resistance and insulation properties, and have good application prospects in aerospace, automotive electronics and other fields. However, due to the inherent brittleness and poor cold workability of ceramic materials, it is difficult to process and prepare large ceramic complex parts, which greatly limits its application in many fields. A large number of studies have shown that combining the advantages of high strength, high toughness and excellent cold workability of metal materials with ceramics can make up for the shortcomings of ceramic materials. Among many metals and alloys, oxygen-free ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/02C04B37/02B23K35/40B23K35/30
CPCC22C9/00C22C1/02B23K35/302B23K35/40C04B37/023
Inventor 李琪刘凤美熊敏高海涛易耀勇李丽坤张雪莹
Owner CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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