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A preparation method for batch 3D printing cucr composite contacts

A composite contact and 3D printing technology, which is applied in the direction of additive manufacturing, additive processing, electrical components, etc., can solve the problems of high ineffective cost and other problems, and achieve the advantages of saving raw materials, customizable contact shape, corrosion resistance and easy disconnection Effect

Active Publication Date: 2021-06-29
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invalid cost of such contacts is too high. If the remaining unused parts are replaced with copper sheets, not only can the manufacturing cost be greatly saved, but the remaining copper can even be returned to the furnace for reuse.

Method used

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  • A preparation method for batch 3D printing cucr composite contacts
  • A preparation method for batch 3D printing cucr composite contacts

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing batch-type 3D printed CuCr composite contacts, mainly comprising the following steps:

[0033] 1) mixed powder

[0034] Weigh the raw materials according to the mass percentage of 90wt / % atomized Cu powder and 10wt / % Cr powder, the powder particle size of atomized Cu powder is 55 μm, the powder particle size of Cr powder is 50 μm, and the powder of atomized Cu powder and Cr powder The sphericity is 80%, and the ball mill is repeatedly washed with argon gas with a purity of 99.9%, and the weighed atomized Cu powder and Cr powder are loaded into the ball mill under an argon atmosphere, and the ball-to-material ratio is 1:3. Then vacuum the ball mill to 0.1Pa, then fill the ball mill with hydrogen to vacuum to 0.7MPa, start ball milling, and the ball milling time is 2h to obtain CuCr mixed powder, the particle size of CuCr mixed powder is 55 μm, and the oxygen content of CuCr mixed powder is 600ppm , Nitrogen content is 400ppm;

[0035] 2) Plate pr...

Embodiment 2

[0044] A method for preparing batch-type 3D printed CuCr composite contacts, mainly comprising the following steps:

[0045] 1) mixed powder

[0046] Weigh raw materials according to the mass percentage of 70wt / % atomized Cu powder and 30wt / % Cr powder, the powder particle size of atomized Cu powder is 40 μm, the powder particle size of Cr powder is 35 μm, and the powder of atomized Cu powder and Cr powder The sphericity is 90%, and the ball mill is repeatedly washed with argon gas with a purity of 99.9%, and the weighed atomized Cu powder and Cr powder are loaded into the ball mill under an argon atmosphere, and the ball-to-material ratio is 1:4. Then vacuum the ball mill to 0.07Pa, fill in hydrogen to make the ball mill vacuum to 0.6MPa, start ball milling, and the ball milling time is 5h to obtain CuCr mixed powder, the particle size of CuCr mixed powder is 35 μm, and the oxygen content of CuCr mixed powder is 400ppm , Nitrogen content is 300ppm;

[0047] 2) Plate process...

Embodiment 3

[0056] A method for preparing batch-type 3D printed CuCr composite contacts, mainly comprising the following steps:

[0057] 1) mixed powder

[0058] Weigh raw materials according to the mass percentage of 50wt / % atomized Cu powder and 50wt / % Cr powder, the powder particle size of atomized Cu powder is 25 μm, the powder particle size of Cr powder is 20 μm, and the powder of atomized Cu powder and Cr powder The sphericity is 99.9%, and the ball mill is repeatedly scrubbed with argon gas with a purity of 99.9%, and the weighed atomized Cu powder and Cr powder are loaded into the ball mill under an argon atmosphere, and the ball-to-material ratio is 1:5. Then vacuum the ball mill to 0.05Pa, then fill the ball mill with hydrogen to vacuum to 0.5MPa, start ball milling, ball milling time 8h, to obtain CuCr mixed powder, the particle size of CuCr mixed powder is 10 μm, and the oxygen content of CuCr mixed powder is 200ppm , Nitrogen content is 200ppm;

[0059] 2) Plate processing ...

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Abstract

The invention provides a batch-type 3D printing CuCr composite contact preparation method, comprising the following steps: 1) mixing atomized Cu powder and Cr powder to obtain CuCr mixed powder; 2) cutting the brass plate into Process the remaining single piece and fix it on the substrate; 3) Use SLM 3D printing technology to print CuCr mixed powder on the brass plate to form a composite contact part; 4) Wire cutting to remove the printed composite contact part , machine processing to remove the printing allowance to obtain the CuCr composite contact; 5) heat-treat the CuCr composite contact in a vacuum atmosphere furnace and keep it warm for 3‑6h. The CuCr composite contact prepared by the present invention has the advantages of fine composite interface without holes, superfine microstructure, short processing cycle, batch production, high yield, simple heat treatment process, and customizable contact shape.

Description

technical field [0001] The invention belongs to the technical field of metal powder manufacturing products, and in particular relates to a method for preparing batch-type 3D printed CuCr composite contacts. Background technique [0002] Copper-based contacts have a good application market, but with the advent of the 5G era, low-cost and diversified product requirements have become a contemporary consensus; and there are currently two ways to reduce costs, one is the development of composite materials: The parts that support the contacts are replaced by cheap materials; one is to develop new technologies: to develop a process with fewer processes and better performance. [0003] Patent CN111636061A in the prior art discloses a method for producing CuCr composite contacts by laser cladding in batches. The patent is to clad the required material powder on the copper-based surface, and the finished product is a machine-added blank, which achieves a certain cost saving. effect, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/28B22F10/64B22F7/08C22C9/00H01H11/04B33Y10/00B33Y40/20
CPCB22F3/24B22F7/08B22F2003/248B33Y10/00B33Y40/20C22C9/00H01H11/048
Inventor 王文斌姚培建刘凯王小军张石松李鹏武旭红师晓云屈晓鹏
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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