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High throughput preparation method of sliding electric contact material composed of ingredients in gradient distribution

A sliding electrical contact and composition gradient technology, which is applied in the fields of sliding electrical contact materials and high-throughput preparation, can solve problems such as huge workload, and achieve the effects of reducing the amount of experiments, simple operation, and strong operability.

Active Publication Date: 2019-12-20
KUNMING INST OF PRECIOUS METALS
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a high-throughput method for preparing sliding electrical contact composite experimental materials and alloy experimental materials with gradient distribution of components for the traditional research on multi-component composite materials and multi-component alloy materials. The advantages of simple operation and the ability to prepare multiple or even hundreds of component samples at one time

Method used

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  • High throughput preparation method of sliding electric contact material composed of ingredients in gradient distribution
  • High throughput preparation method of sliding electric contact material composed of ingredients in gradient distribution
  • High throughput preparation method of sliding electric contact material composed of ingredients in gradient distribution

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: silver graphene composite sliding electrical contact material

[0036] 1) Taking silver and graphene with a purity of 99.99% as raw materials, weighing and configuring 16 raw materials with different composition ratios, the composition ratios are shown in Table 1, and the weight of each composition composite powder is 300g.

[0037]2) Mix the powders of the above 16 components by ball milling with a high-throughput desktop planetary ball mill to make composite powders;

[0038] 3) Refer to image 3 The composition structure gradient distribution diagram of the ingot is shown. Put the composite powder into the cold isostatic pressing mold with a diameter of Φ=50mm in sequence according to the order of 1#-16#, and pass the 1mm thick matrix pure Silver powder connection;

[0039] 4) The composite powder is cold isostatically pressed into an ingot, and the molding pressure is 200MPa;

[0040] 4) Ingot hot isostatic pressing sintering, sintering pressure 600...

Embodiment 2

[0046] Embodiment 2: Silver-copper-nickel alloy sliding electrical contact material

[0047] 1) Silver, copper and nickel with a purity of 99.99% are raw materials, wherein nickel powder is an added element, and the silver flakes of 1440g and the copper flakes of 160g are weighed and configured; all silver and copper are put into a directional solidification graphite crucible;

[0048] 2) Put the nickel powder that needs to be doped into the secondary feeding funnel, the flow rate of the feeding funnel is 0.1g / s, put in the nickel powder in turn according to the feeding time shown in Table 2, first put in the nickel according to the feeding time of the 1# sample pink;

[0049] 3) Inductively melt the sample at a temperature of 1200°C and keep it warm for 5 minutes;

[0050] 4) The process parameters of directional solidification are: the temperature of the cooling circulating water in the crystallizer is 25°C, the flow rate of the cooling circulating water is 400L / h, and the ...

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Abstract

The invention discloses a high throughput preparation method of a sliding electric contact material composed of ingredients in gradient distribution. The high throughput preparation method of the sliding electric contact material composed of the ingredients in the gradient distribution includes following steps: (1) preparing a composite composed of ingredients in gradient distribution of 1# proportion / matrix / 2# proportion / matrix / ... / n# proportion by using a powder metallurgic method; (2) performing directional solidification for preparing an alloy material composed of ingredients in gradient distribution of 1#proportion / 2#proportion / 3#proportion / ... / n# proportion; (3) performing steps of isostatic cool pressing, hot isostatic pressing, hot extrusion, rolling, drawing and the like on the composite for preparing a bar material or a wire material; and (4) performing steps of rolling, drawing and the like on the alloy material for preparing a bar material or a wire material. The high throughput preparation method of the sliding electric contact material composed of the ingredients in the gradient distribution can realize the effect of synchronously preparing various or even hundreds oftypes of composite and alloy material test samples once through process innovation of the gradient distribution of the ingredients, can substantially reduce the number of experiment times and shortenexperiment time, rapidly optimizes or screens the alloy ingredients, and greatly improves experiment and research efficiency.

Description

technical field [0001] The invention belongs to the technical field of sliding electrical contact materials and high-throughput preparation, in particular to a high-throughput preparation method of sliding electrical contact experimental materials with composition gradient distribution, which is suitable for composite materials prepared by powder metallurgy and alloys prepared by directional solidification materials that facilitate the rapid screening of optimal compositions for sliding electrical contact materials. Background technique [0002] Sliding electrical contact materials are key materials for the preparation of sliding contact conductive elements such as slip rings, conductive commutator segments, rectifiers, conductive brushes, and potentiometers in motors and electronic devices. It mainly realizes the electric energy transmission from the static object to the moving object by generating translational motion or rotational motion with the counterpart, and its perf...

Claims

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Application Information

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IPC IPC(8): C22C5/08C22C5/06C22C1/04C22C1/05C22C1/10
CPCC22C1/0466C22C1/05C22C5/06C22C5/08
Inventor 方继恒谢明陈永泰李爱坤赵上强胡洁琼杨有才陈赟王塞北
Owner KUNMING INST OF PRECIOUS METALS
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