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High-strength and high-conductivity rare-earth chromium-zirconium-copper spring contact finger and manufacturing method thereof

A spring-finger, high-conductivity technology, used in contacts, circuits, electrical switches, etc., can solve the problems of environmental pollution, low elasticity, easy deformation, etc., and achieve excellent comprehensive performance, small burning loss, and good resilience. Effect

Active Publication Date: 2017-01-25
CHINA XIDIAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, beryllium is toxic and causes serious environmental pollution.
Although chrome-zirconium copper has good electrical conductivity, it has low strength, low hardness, and low elasticity, and is easily deformed during use. It can only be used to prepare small-sized, low-elasticity contacts. Some of them rely on imports, and the price is also the most expensive among the three wire materials, about 20% more expensive than domestic beryllium copper.

Method used

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  • High-strength and high-conductivity rare-earth chromium-zirconium-copper spring contact finger and manufacturing method thereof
  • High-strength and high-conductivity rare-earth chromium-zirconium-copper spring contact finger and manufacturing method thereof

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Effect test

Embodiment 1

[0024] Metal copper (99.95%), metal zirconium (99.9%), metal chromium (99.9%) and industrial rare earth materials (cerium-rich rare earth silicon magnesium), the alloying ratio is: chromium 8%, zirconium 0.1%, rare earth 3 %, copper 88.9%, followed by vacuum smelting (vacuum degree 6.67×10 -2 Pa~6.67×10 -2 Pa; add copper into the furnace to be melted into copper water, add metal chromium wrapped in copper skin, and keep the furnace at 1330°C; secondly, metal zirconium wrapped in copper skin, keep the temperature of the furnace at 1310°C, keep warm and melt; finally add industrial rare earth materials, keep warm Casting after 20 minutes), homogenization annealing (temperature 900°C, time 1h), ingot extrusion billet opening (extrusion bar size Φ18mm), multi-pass continuous drawing and intermediate stress relief annealing (temperature 450°C), The main processes such as wire winding spring, fixed-length compression spring, and contact finger butt welding are used to make the fini...

Embodiment 2

[0027] Metal copper (99.95%), metal zirconium (99.9%), metal chromium (99.9%) and industrial rare earth materials (cerium-rich rare earth silicon magnesium), the alloying ratio is: chromium 10%, zirconium 0.2%, rare earth 6 %, copper 83.8%, followed by vacuum smelting (vacuum degree 6.67×10 -2 Pa~6.67×10 -2 Pa; add copper to the furnace to be melted into copper water, add metal chromium wrapped in copper skin, and keep the furnace at 1430 °C; secondly, metal zirconium wrapped in copper skin, keep the temperature of the furnace at 1410 °C, keep warm and melt; finally add industrial rare earth materials, keep warm Casting after 5 minutes), homogenization annealing (temperature 980°C, time 2h), ingot extrusion billet opening (extrusion bar size Φ30mm), multi-pass continuous drawing and intermediate stress relief annealing (temperature 580°C), The main processes such as wire winding spring, fixed-length compression spring, and contact finger butt welding are used to make the fini...

Embodiment 3

[0030] Metal copper (99.95%), metal zirconium (99.9%), metal chromium (99.9%) and industrial rare earth materials (cerium-rich rare earth silicon magnesium), the alloying ratio is: chromium 15%, zirconium 0.5%, rare earth 8 %, copper 76.5%, followed by vacuum smelting (vacuum degree 6.67×10 -2 Pa~6.67×10 -2 Pa; add copper to the furnace to be melted into copper water, add metal chromium wrapped in copper skin, and keep the furnace at 1400 °C; secondly, metal zirconium wrapped in copper skin, keep the temperature of the furnace at 1400 °C, keep warm and melt; finally add industrial rare earth materials, keep warm Casting after 5-20 minutes), homogenization annealing (temperature 950°C, time 1h-2h), ingot extrusion billet opening (extrusion bar size Φ18-Φ30mm), multi-pass continuous drawing and intermediate stress relief annealing (Temperature 500 ℃), wire winding spring, fixed-length compression spring, contact finger butt welding and other main processes to make the finished ...

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Abstract

The invention discloses a high-strength and high-conductivity rare-earth chromium-zirconium-copper spring contact finger and a manufacturing method thereof. The spring contact finger is manufactured from, by weight, 99.95% of metallic copper, 99.9% of metallic zirconium, 99.9% of metallic chromium and industrial rare-earth materials (cerium-rich rare earth and silicon magnesium), and alloys include, by weight, 8-15% ofzirconium, 0.2-1.5% of chromium, 3-8% of rare earth and the balance of the copper. The manufacturing method mainly includes the steps of vacuum melting, homogenizing annealing, extrusion breakdown of cast ingot (an extruded rod is phi18-phi30mm in size), multi-pass continuous drawing and intermediate stress relief annealing, wire winding spring, sizing pressure spring, butt welding of the contact finger and the like. The spring contact finger has the advantages of high ultimate tensile strength, high electric conductivity, good rebound resilience, no pollution and the like, the mechanical property of the spring contact finger is comparable to that of beryllium copper while the physical performance and environmental index of the same are obviously superior to the beryllium copper, and the spring contact finger can take the place of the beryllium copper in majority of occasions where the spring contact finger is used.

Description

technical field [0001] The invention belongs to the technical field of spring contact finger manufacturing, and relates to a high-strength, high-conductivity rare-earth chromium-zirconium-copper spring contact finger and a manufacturing method thereof. Background technique [0002] The spring contacts used for static connections have basically been domestically produced, while the spring contacts used in high-precision, high-performance, high-reliability electrical equipment for dynamic connections are all imported and expensive (generally 3 times the price of domestic parts). times more). [0003] At present, spring contacts are divided into three types according to their materials: beryllium copper, beryllium cobalt copper, and chromium zirconium copper. The first two have been localized and have stable performance. However, beryllium is toxic and causes serious environmental pollution. Although chrome-zirconium copper has good electrical conductivity, it has low strengt...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08H01H1/025H01H11/04H01R13/03
CPCC22C1/02C22C9/00C22F1/08H01H1/025H01H11/04H01R13/03
Inventor 苏谋曹默李伟邵茜李家梅沈崇虎
Owner CHINA XIDIAN GRP CO LTD
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