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Preparation method of CuW/CrCu integral high-voltage electrical contacts

A high-voltage, contact technology, applied in contacts, circuits, electrical switches, etc., can solve problems such as waste of materials

Inactive Publication Date: 2009-10-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing CuW / CrCu integral high-voltage electrical contacts, which solves the problem of wasting a large amount of materials by first sintering and then cutting in the existing method

Method used

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  • Preparation method of CuW/CrCu integral high-voltage electrical contacts
  • Preparation method of CuW/CrCu integral high-voltage electrical contacts
  • Preparation method of CuW/CrCu integral high-voltage electrical contacts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take the CuW powder and CrCu powder according to the mass percentage of 1:0.001 and place them in the mixer, and mix the powders at a speed of 120 rpm for 3 hours to obtain a uniformly mixed powder; a cold mold including a phase-separated internal The cavity upper mold 5 and the lower mold 9 with a cavity inside, a detachable gasket 7 is arranged between the upper mold 5 and the lower mold 9, and a detachable cylindrical core is arranged in the inner cavity of the lower mold 9 b8, the size of the core b8 and the electrical contact to be prepared are matched, the mixed powder is poured into the cavity between the lower mold 9 and the core b8 in the cold mold, and then the lower mold 9 containing the powder Place it on a hydraulic press to form a hollow cylindrical tungsten skeleton with a pressure of 5MPa and hold the pressure for 45s; put the tungsten skeleton in a cylindrical crucible, and place a pure copper block on the tungsten skeleton, and perform infiltration sinteri...

Embodiment 2

[0033]Take the CuW powder and CrCu powder according to the mass percentage of 1.5:0.01 and put them in the mixer, and mix the powder for 8 hours at a speed of 120 rpm to obtain a uniformly mixed powder; a cold mold is used, including a phase-separated inner part The cavity upper mold 5 and the lower mold 9 with a cavity inside, a detachable gasket 7 is arranged between the upper mold 5 and the lower mold 9, and a detachable cylindrical core is arranged in the inner cavity of the lower mold 9 b8, the size of the core b8 and the electric contact to be prepared are matched, the mixed powder is poured into the cavity between the lower mold 9 and the core b8 in the cold mold, and then the lower mold 9 containing the powder Place it on a hydraulic press to form a hollow cylindrical tungsten skeleton with a pressure of 10 MPa and hold the pressure for 30 s; place the tungsten skeleton in a cylindrical crucible, and place a pure copper block on the tungsten skeleton, and perform infiltrat...

Embodiment 3

[0035] Take the CuW powder and CrCu powder according to the mass percentage of 1.3:0.005 and place them in the mixer, and mix the powders at a speed of 120 rpm for 5 hours to obtain a uniformly mixed powder; a cold mold is used, including a phase-separated inner part The cavity upper mold 5 and the lower mold 9 with a cavity inside, a detachable gasket 7 is arranged between the upper mold 5 and the lower mold 9, and a detachable cylindrical core is arranged in the inner cavity of the lower mold 9 b8, the size of the core b8 and the electric contact to be prepared are matched, the mixed powder is poured into the cavity between the lower mold 9 and the core b8 in the cold mold, and then the lower mold 9 containing the powder Place it on a hydraulic press to form a hollow cylindrical tungsten skeleton with a pressure of 7MPa and hold the pressure for 35s; place the tungsten skeleton in a cylindrical crucible, and place a pure copper block on the tungsten skeleton, and perform infiltr...

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Abstract

The invention discloses a preparation method of CuW / CrCu integral high-voltage electrical contacts, which includes the following steps of: firstly taking and mixing CuW powder and CrCu powder with the mass percentage of 1 to 1.5:0.001 to 0.01 and then adopting a cold mold and a hot mold; wherein the cold mold comprises an upper mold and a lower mold which are separated and have a cavity in the interior; a dismountable gasket is arranged between the upper mold and the lower mold; a dismountable mold core b is arranged in the interior cavity of the lower mold; a tungsten skeleton is pressed in the cold mold and the infiltration and sintering are carried out in a cylindrical pot; the hot mold comprises an external mold with a cavity in the interior, and a dismountable mold core a is arranged in the cavity of the interior of the external mold, infiltrated and sintered in the hot mold and then is put into the cold mold for pressing a flange; and then the CuW / CrCu integral high-voltage electrical contacts are obtained after machining. The preparation method of CuW / CrCu integral high-voltage electrical contacts uses the hot mold and cold mold with the mold core structure in sintering with no need of being machined after being processed into entity, thus achieving the purpose of saving materials.

Description

Technical field [0001] The invention belongs to the technical field of metal material preparation, and relates to a method for preparing a high-voltage electrical contact, in particular to a method for preparing a CuW / CrCu integral high-voltage electrical contact. Background technique [0002] CuW composite material is a kind of composite material composed of two phases of W and Cu uniformly distributed and neither solid solution nor compound formation. It has the high melting point, high specific gravity, electrical solidity resistance, high high temperature strength and high temperature strength of W. Cu has high electrical conductivity, high thermal conductivity, high plasticity and easy processing, so it has a very wide range of applications in contacts. At present, the traditional method of manufacturing CuW / CrCu integral high-voltage electrical contacts is to use an outer mold with a hollow inside to sinter the whole piece of copper tungsten and chromium copper materials to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/04H01H1/021B22F3/16
Inventor 邹军涛梁淑华谢柯李永华刘艳洁
Owner XIAN UNIV OF TECH
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