Constantan-oxygen-free copper composite tuning material and preparation method thereof

A technology of oxygen-free copper and constantan alloy, which is applied in the direction of chemical instruments and methods, transit time electron tubes, lamination devices, etc., can solve the problem of poor density on the surface of the coating, poor connection of the coating of the tuning diaphragm, and difficulty in the thickness of the coating. Precise control and other issues, to achieve the effect of bright surface, overcome the weak connection of the coating, and strong anti-fatigue ability

Inactive Publication Date: 2014-03-26
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In view of the above-mentioned technical problems, the present invention provides a constantan-oxygen-free copper composite tuning material and a preparation method thereof to solve problems in the prior art that the coating of the tuning diaphragm is not firmly connected, the thickness of the coating is difficult to control accurately, and the surface density of the coating is relatively high. Bad question

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  • Constantan-oxygen-free copper composite tuning material and preparation method thereof
  • Constantan-oxygen-free copper composite tuning material and preparation method thereof

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preparation example Construction

[0024] In yet another exemplary embodiment of the present invention, a method for preparing the above-mentioned constantan-oxygen-free copper composite tuning material is also provided. Please refer to figure 2 , the preparation method comprises:

[0025] Step A, preparing an oxygen-free copper-constantan alloy-oxygen-free copper composite by diffusion welding;

[0026] This step A can further include:

[0027] Sub-step A1, cleaning and degreasing the processed cuboid-shaped upper oxygen-free copper material, constantan alloy material and lower oxygen-free copper material, wherein the upper oxygen-free copper material and the lower oxygen-free copper material have the same thickness, and the constantan The thickness ratio of alloy material and upper oxygen-free copper material is 1:1~4:1;

[0028] Sub-step A2, assembling and positioning the parts in the order of the upper oxygen-free copper material, the constantan alloy material and the lower oxygen-free copper material; ...

specific example

[0038] A specific example is given below: prepare two oxygen-free copper parts with a diameter of 50mm and a thickness of 5mm and one constantan alloy part, perform assembly and positioning in the order of oxygen-free copper-constantan-oxygen-free copper, and conduct diffusion welding in a vacuum furnace. The vacuum degree is not lower than 1.0×10 -3 Pa, diffusion pressure 0.3MPa, diffusion temperature 900°C, diffusion time 180min. After diffusion welding, the parts are cold-rolled to 15% of the parts, and the deformation rate of each rolling is 10% to 15%, and then vacuum annealing is carried out. The annealing temperature is 700°C, the heat preservation is 60min, and the vacuum degree is not lower than 1× 10 -3 Pa, after cooling to room temperature with the furnace, take it out and carry out the second rolling treatment, cold rolling to 0.2mm, the deformation rate of each rolling is 15-20%, and finally carry out re-pressure annealing treatment, the annealing temperature is ...

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Abstract

The invention provides a constantan-oxygen-free copper composite tuning material and a preparation method thereof. The constantan-oxygen-free copper composite tuning material comprises a constantan alloy layer as well as an upper oxygen-free copper layer and a lower oxygen-free copper layer, wherein the thickness of the constantan alloy layer is 0.03mm-0.13mm; the upper oxygen-free copper layer and the lower oxygen-free copper layer are respectively connected with the upper surface and the lower surface of the constantan alloy layer through a metallic bond, and the thicknesses of the upper oxygen-free copper layer and the lower oxygen-free copper layer are 0.025mm-0.066mm. The constantan-oxygen-free copper composite tuning material and the preparation method provided by invention have the advantages that the upper and lower oxygen-free copper layers and the middle constantan alloy layer are combined together through the metallic bond, the constantan-oxygen-free copper composite tuning material has the unique advantage of the tight combination of the molecules, and the defects in the prior art that the connection of a tuning film layer is not firm, and the thickness of a coating layer is hard to accurately control are overcome.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a constantan-oxygen-free copper composite tuning material used in the electric vacuum industry and a preparation method thereof. Background technique [0002] Changing the resonant frequency of the electric vacuum klystron resonant cavity by mechanical means is an important means to broaden the working bandwidth of the klystron. It can also be used to compensate the frequency change during the welding process. It can also be used to adjust the group resonance during the thermal measurement process. The frequency distribution of the cavity achieves the desired power-frequency characteristic. For mechanically tuned klystrons, the design of the resonant cavity and mechanical tuning structure has an important impact on the performance of the klystron. The tuning requires good repeatability and small error. fire and localized overheating; [0003] At present, metal materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B37/10H01J23/00
Inventor 李海涛张兆传王小霞刘月清王国建孙东
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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