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High-strength platinum-based electric contact material and preparation method thereof

An electrical contact material, high-strength technology, applied in the field of electrical contact, can solve problems such as poor wear resistance, and achieve the effect of preventing high temperature oxidation

Active Publication Date: 2021-09-17
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the current materials cannot meet the above performance requirements at the same time, it is an urgent problem to research and develop a new type of electrical contact material with good wear resistance and moderate resistivity.
[0004]AuNi9 alloy, as a gold-based precious metal electrical contact material that has been put into use, is widely used in the conductive ring of spacecraft system because of its good electrical conductivity Brush filament, but its wear resistance is not good

Method used

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  • High-strength platinum-based electric contact material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The platinum-based electrical contact material was prepared according to the following steps:

[0052] (1) Dosing according to Pt: 93%, Au: 2%, and Ni: 5%, and wrap the gold and nickel particles with platinum sheets.

[0053] (2) Place the alloy mixture obtained in step (1) in a vacuum melting furnace for melting.

[0054] (3) Put the alloy ingot obtained in step (2) into an alumina crucible, wrap it with alumina powder in advance and cover it with a layer of carbon powder, and place it in a muffle furnace for homogenization heat treatment at 900° C. for 1 hour.

[0055] (4) The alloy ingot after the homogenization treatment in step (3) is cold-rolled on a cold rolling mill, and the homogenization treatment is performed when the deformation reaches 70% during the rolling process, the temperature is 900° C., and the time is 1 h. until rolling The rods were homogenized again at 900°C for 1 hour.

[0056] (5) the step (4) obtained The alloy rods were drawn on a wire ...

Embodiment 2

[0059] The platinum-based electrical contact material was prepared according to the following steps:

[0060] (1) Dosing according to Pt: 93%, Au: 2%, and Ni: 5%, and wrap the gold and nickel particles with platinum sheets.

[0061] (2) Place the alloy mixture obtained in step (1) in a vacuum melting furnace for melting.

[0062] (3) Put the alloy ingot obtained in step (2) into an alumina crucible, wrap it with alumina powder in advance and cover it with a layer of carbon powder, and place it in a muffle furnace for homogenization heat treatment at 900° C. for 1 hour.

[0063] (4) The alloy ingot after the homogenization treatment in step (3) is cold-rolled on a cold rolling mill, and the homogenization treatment is performed when the deformation reaches 70% during the rolling process, the temperature is 900° C., and the time is 1 h. until rolling The rods were homogenized again at 900°C for 1 hour.

[0064] (5) the step (4) obtained The alloy bar is drawn on a wire dra...

Embodiment 3

[0067] The platinum-based electrical contact material was prepared according to the following steps:

[0068] (1) Dosing according to Pt: 90%, Au: 5%, Ni: 5%, wrapping gold and nickel particles with platinum sheets.

[0069] (2) Place the alloy mixture obtained in step (1) in a vacuum melting furnace for melting.

[0070] (3) Put the alloy ingot obtained in step (2) into an alumina crucible, wrap it with alumina powder in advance and cover it with a layer of carbon powder, and place it in a muffle furnace for homogenization heat treatment at 900° C. for 1 hour.

[0071] (4) The alloy ingot after the homogenization treatment in step (3) is cold-rolled on a cold rolling mill, and the homogenization treatment is performed when the deformation reaches 70% during the rolling process, the temperature is 900° C., and the time is 1 h. until rolling The rods were homogenized again at 900°C for 1 hour.

[0072] (5) the step (4) obtained The alloy bar is drawn on a wire drawing mac...

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Abstract

The invention discloses a high-strength platinum-based electric contact material and a preparation method thereof. The high-strength platinum-based electric contact material comprises the following components in percentage by mass: 1 to 5 percent of Au; 1 to 5 percent of Ni; and the balance of Pt. According to the high-strength platinum-based electric contact material and the preparation method thereof provided by the invention, the tensile strength of a platinum-based alloy wire ranges from 900 MPa to 1150 MPa, the Vickers hardness ranges from 300 HV to 360 HV, the resistivity ranges from 25 mu omega.cm to 27 mu omega.cm, the comprehensive performance is improved, the machining performance is excellent, the yield is high, and the corrosion resistance is good.

Description

technical field [0001] The invention relates to the field of electrical contact technology, in particular to a high-strength platinum-based electrical contact material and a preparation method thereof. Background technique [0002] As a kind of functional material for power transmission and signal transmission, electrical contact materials are mainly used in various switches, relays, controllers, micro-motors and other electronic components, including contacts, brushes, slip rings, commutators, etc. . Conductive slip rings are important electromechanical components of spaceborne products. The performance, quality and service life of brush wires in conductive slip rings directly affect the use of products. With the development of modern industry, higher requirements are constantly put forward for the performance of electrical contact materials. In order to ensure the reliability of aerospace and precision instruments, brush materials need to have a large elastic modulus, lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04B21C37/04C22C1/02C22F1/02C22F1/14H01H1/023
CPCC22C5/04C22C1/02B21C37/04C22F1/14C22F1/02C22F1/002H01H1/023
Inventor 毛勇余恒飞何俊杰张科熊凯张顺猛张心培皮琳许思勇郭锦新
Owner YUNNAN UNIV
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