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High-beryllium copper continuous coating film rolling composite material for photomultiplier dynodes and preparation method of high-beryllium copper continuous coating film rolling composite material

A technology of rolling composite materials and photoelectric multiplication, which is applied in metal material coating process, sputtering plating, ion implantation plating, etc., which can solve problems such as easy cracking, easy hole formation in the strip, small strip size, etc. , to achieve a large secondary electron emission coefficient, realize the combination of metallurgy and machinery, and improve the utilization efficiency

Active Publication Date: 2019-10-15
KINKOU SUZHOU COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Low efficiency, in order to increase the interfacial bonding force between beryllium and copper, it is necessary to carry out long-term thermal diffusion;
[0006] (2) Since there is only metallurgical bonding, the interfacial bonding force is poor, and when the beryllium content is higher than 2.3wt%, a hard and brittle second phase is formed, which is easy to crack and cannot be formed;
[0007] (3) Size limitation. In order to make the beryllium diffuse evenly, the strip with the smallest thickness as possible has to be used as the base material, which cannot meet the requirements for the use of beryllium copper strips for conventional elastic components.
[0008] Patent CN106498226A adopts the method of combining strip throwing and finishing rolling, which suppresses the generation of hard and brittle phases of high beryllium copper strip prepared by traditional semi-continuous rolling method, and has a short process and high efficiency, but there are also the following problems: using the strip throwing method to prepare The strips are prone to holes, which make the forming cracks, and the strips prepared by throwing the strips are small in size, which cannot meet the requirements of large-scale industrial production.

Method used

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  • High-beryllium copper continuous coating film rolling composite material for photomultiplier dynodes and preparation method of high-beryllium copper continuous coating film rolling composite material
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  • High-beryllium copper continuous coating film rolling composite material for photomultiplier dynodes and preparation method of high-beryllium copper continuous coating film rolling composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (a) Preprocessing

[0039] Select a C17300 beryllium copper strip with a thickness of 0.6mm as the base material, pickle it in dilute sulfuric acid with a concentration of 5% for 5 minutes to remove scale, rinse it with water, and then use mechanical polishing, and then ultrasonically clean and dry it in an absolute ethanol environment. ;

[0040] (b) Coating

[0041] The dried base material is placed on the substrate table 1 as the anode, and then the copper-beryllium master alloy with a weight fraction of 4wt.% is packed into the target base 2 of the coating machine as the cathode, and the target base 2 of the coating machine is pumped out. Vacuum to 10 -3 Pa, preheat the substrate to 600°C, use the argon ion generator to continuously bombard the target, the energy of the argon ion generator is 10MeV, at the same time, maintain the cathode rotation speed at 5r / min, control the current at 10A, and deposit for 20min to obtain a coating After stripping, carry out on-l...

Embodiment 2

[0051] (a) Preprocessing

[0052] Select a pure copper strip with a thickness of 2mm as the base material, pickle it in dilute sulfuric acid with a concentration of 3% for 3 minutes to remove scale, rinse it with water, and then use mechanical polishing, and then ultrasonically clean and dry it in an anhydrous ethanol environment for later use;

[0053] (b) Coating

[0054] Place the dried base material as the anode on the substrate table 1, then put the copper-beryllium master alloy with a weight fraction of 8wt.% into the target base 2 of the coating machine as the cathode, and pump the target base 2 of the coating machine Vacuum to 10 -3 Pa, preheat the substrate to 780°C, use the argon ion generator to continuously bombard the target, the energy of the argon ion generator is 60MeV, at the same time, maintain the cathode rotation speed at 36r / min, control the current at 50A, and deposit for 55min to obtain a coating After stripping, carry out on-line quenching, the quench...

Embodiment 3

[0064] (a) Preprocessing

[0065] Select the C17300 beryllium copper strip as the base material, pickle it in 5% dilute sulfuric acid for 5 minutes to remove the scale, rinse it with water, use mechanical polishing, and ultrasonically clean and dry it in an anhydrous ethanol environment for later use;

[0066] (b) Coating

[0067] Place the dried base material as the anode on the substrate table 1, then put the copper-beryllium master alloy with a weight fraction of 10wt.% into the target base 2 of the coating machine as the cathode, and pump the target base 2 of the coating machine Vacuum to 10 -3 Pa, preheat the substrate to 800°C, use the argon ion generator to continuously bombard the target material, the energy of the argon ion generator is 100MeV, at the same time, maintain the rotation speed of the cathode at 50r / min, control the current at 60A, and deposit for 60min to obtain a coating After stripping, carry out on-line quenching, the quenching temperature is 820°C, ...

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Abstract

The invention discloses a high-beryllium copper continuous coating film rolling composite material for photomultiplier dynodes and a preparation method of the high-beryllium copper continuous coatingfilm rolling composite material. The process of the method comprises the steps of pretreatment, film coating and rolling deformation. By means of the method, beryllium elements in a belt material aregathered on the surface layer, the utilization efficiency of the beryllium is improved, small beryllium addition and a relatively large secondary electron yield are both considered, the binding forceof an interface is improved, and metallurgical and mechanical bonding of the interface is achieved.

Description

technical field [0001] The invention relates to the field of metal material processing technology, in particular to a high beryllium copper continuous coating and rolling composite material for a photomultiplier and a preparation method thereof. Background technique [0002] Beryllium copper alloy has excellent properties such as high strength, high hardness, high elasticity, high conductivity, good stability, non-magnetism, and no sparks during impact, and is widely used in aerospace, computer, automobile and other industries. The activated and oxidized beryllium copper strip is a commonly used multiplier material for photomultiplier tubes. It has excellent characteristics such as high secondary electron emission coefficient, good stability, and long service life. The key to the secondary electron emission coefficient of the alloy is to obtain a better secondary electron emission coefficient. Generally, the composition requirements of the beryllium bronze alloy used for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C23C14/16C23C14/34C23C14/58C22F1/08
CPCC22C9/00C22F1/002C22F1/08C23C14/165C23C14/34C23C14/58C23C14/5806
Inventor 朱戴博陈德山韩坦
Owner KINKOU SUZHOU COPPER IND CO LTD
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