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Preparation method of CuAl2O3 composite material for high-voltage direct-current relay

A high-voltage direct current, composite material technology, applied in circuits, electrical switches, electrical components, etc., can solve problems such as complex preparation methods, and achieve the effects of simple process, good ability to turn on and off current, and excellent electrical and thermal conductivity.

Inactive Publication Date: 2021-01-29
桂林金格电工电子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the contact material prepared by the method described in this invention has higher electrical conductivity and hardness and better arc ablation resistance and welding resistance, its preparation method is relatively complicated

Method used

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  • Preparation method of CuAl2O3 composite material for high-voltage direct-current relay
  • Preparation method of CuAl2O3 composite material for high-voltage direct-current relay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of copper-aluminum alloy powder: Place No. 1 electrolytic copper in a crucible, cover it with dry charcoal (the thickness of the charcoal covering layer is 50-60mm), and then put it in an intermediate frequency induction furnace for melting at a melting temperature of 1150°C-1200°C ; Add copper-aluminum master alloy according to the ratio of 0.06wt% aluminum content in the final gained copper-aluminum alloy powder afterwards, continue smelting, and the gained copper-aluminum melt is atomized through high-pressure water atomization equipment (atomization temperature is 1150 ℃~ 1200°C, high-pressure water jet angle 70°, atomization water pressure 20Mpa, tundish temperature 900°C-950°C, leakage ), the obtained powder is dried, sieved (150 μm), and the undersize is collected, which is copper-aluminum alloy powder;

[0027] 2) Oxygen distribution and powder mixing: Take the oxygen source, copper-aluminum alloy powder and tungsten powder (2-5 μm) and place the...

Embodiment 2

[0034]1) Preparation of copper-aluminum alloy powder: Place No. 1 electrolytic copper in a crucible, cover it with dry charcoal (the thickness of the charcoal covering layer is 50-60mm), and then put it in an intermediate frequency induction furnace for melting at a melting temperature of 1150°C-1200°C ; Add copper-aluminum master alloy according to the ratio of 0.17wt% aluminum content in the final gained copper-aluminum alloy powder afterwards, continue smelting, and the gained copper-aluminum melt is atomized through high-pressure water atomization equipment (atomization temperature is 1150 ℃~ 1200°C, high-pressure water jet angle 70°, atomization water pressure 22Mpa, tundish temperature 900°C-950°C, leakage ), the obtained powder is dried, sieved (150 μm), and the undersize is collected, which is copper-aluminum alloy powder;

[0035] 2) Oxygen distribution and powder mixing: put the oxygen source, copper-aluminum alloy powder and tungsten powder (1-2 μm) in a V-shaped m...

Embodiment 3

[0042] 1) Preparation of copper-aluminum alloy powder: put No. 1 electrolytic copper in a crucible, cover it with dry charcoal (the thickness of the charcoal covering layer is 50-60mm), and then put it in an intermediate frequency induction furnace for melting at a melting temperature of 1200-1230°C; Add the copper-aluminum master alloy according to the ratio of 0.3wt% aluminum content in the copper-aluminum alloy powder obtained afterwards, continue smelting, and the copper-aluminum molten liquid of gained is atomized through high-pressure water atomization equipment (atomization temperature is 1200~1230 ℃ , high-pressure water jet angle 70°, atomization water pressure 20Mpa, tundish temperature 900-950°C, leakage ), the obtained powder is dried, sieved (150 μm), and the undersize is collected, which is copper-aluminum alloy powder;

[0043] 2) Oxygen distribution and powder mixing: put the oxygen source, copper-aluminum alloy powder and molybdenum powder (1-2 μm) in a V-sha...

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Abstract

The invention discloses a preparation method of a CuAl2O3 composite material for a high-voltage direct-current relay. The preparing method comprises the following steps that firstly, copper-aluminum alloy powder is prepared, then copper oxide powder or oxidized copper-aluminum alloy powder is adopted as an oxygen source, the oxygen source and the copper-aluminum alloy powder are subjected to oxygen distribution according to the atomic ratio of the oxygen content to the aluminum content being 4:2-6:2 and then mixed with tungsten powder or molybdenum powder, and mixed powder is obtained; the obtained mixed powder is pressed to obtain a pressed blank; internal oxidation is conducted on the obtained pressed blank, and then reducing and sintering are conducted to obtain a sintered ingot; and sheathing and hot extrusion are conducted on the obtained sintered ingot, and then the composite material is obtained. Compared with the prior art, the method is simple in process, and the prepared CuAl2O3 composite material has better mechanical strength and conductivity while considering arc ablation resistance and fusion welding resistance, and is suitable for high-voltage direct-current relays.

Description

technical field [0001] The invention relates to a kind of CuAl for high-voltage direct current relay 2 o 3 A preparation method of a composite material belongs to the technical field of contact materials. Background technique [0002] High-voltage DC relays are mainly used in new energy vehicles and their supporting charging piles and other facilities. In new energy vehicles, high-voltage DC relays are used in DC voltage control, high-voltage pre-charging, normal / fast charging, isolation protection, and safety control. Therefore, Whether electric vehicles can be safely started, stopped, charged, and driven is closely related to high-voltage DC relays. The normal and reliable operation of high-voltage DC relays is an important condition for determining the safe operation of electric vehicles. [0003] The contact is a key component of the high-voltage DC relay. It plays the role of connecting and carrying current when it is connected, and plays the role of breaking current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00H01H11/04
CPCC22C1/0425C22C1/058C22C9/00H01H11/048
Inventor 陈名勇党永富陈光明黄锡文李波甘友迅
Owner 桂林金格电工电子材料科技有限公司