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Production method for electrical contact material

A technology of electrical contact material and production method, applied in the direction of electrolytic paint, coating, etc., can solve the problems of high cost, limited types of contact materials, complicated process, etc.

Inactive Publication Date: 2007-01-03
浙江帕特尼触头有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current production methods are only the internal oxidation method and coated powder method can meet the required requirements
However, the general powder mixing and co-precipitation methods cannot meet its performance requirements.
However, the types of contact materials produced by the internal oxidation method are particularly limited. What can be realized now are mainly a few materials in the silver-based materials (such as AgCdO), and the copper-based contact materials cannot be produced by the internal oxidation method.
However, the coated powder method has high cost and complicated process and is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: production of silver / ytterbium trioxide / carbon contact material

[0014] (1) Preparation of silver electroplating solution: prepare 10 liters of silver electroplating solution-take by weighing 250 grams of silver powder and dissolve it in nitric acid to make silver nitrate solution, silver powder should be slightly excessive, and filter for subsequent use. Weigh 70 grams of potassium cyanide and dissolve in distilled water to make a potassium cyanide solution. Then the potassium cyanide solution was added to the silver nitrate solution to obtain a white silver cyanide precipitate, which was washed and filtered for later use. Weigh 220 grams of potassium cyanide and dissolve it in distilled water, add the potassium cyanide solution to the silver cyanide precipitate, and make the silver potassium cyanide solution. Weigh 100 grams of potassium carbonate and dissolve it in distilled water, then add silver potassium cyanide solution. Dilute this solution with...

Embodiment 2

[0021] Embodiment two, production of copper / dysprosium trioxide (samarium trioxide) / carbon contact material

[0022] (1) Preparation of copper electroplating solution: the preparation of 10 liters of electroplating solution-cyanide copper plating solution needs to be prepared under ventilated conditions. When preparing, weigh 1400 grams of potassium cyanide and dissolve it in warm water, weigh 1000 grams of cuprous cyanide and slowly add it to the potassium cyanide solution under constant stirring, and control the temperature so that the temperature of the solution will not rise to 60 °C above. Weigh 40 g of potassium hydroxide and dissolve in distilled water. After both are dissolved, they are miscible with each other. And add water to the specified liquid level, after stirring, filtering, analyzing and adjusting, it can be used.

[0023] (2) Electroplating: passivate the 0.5-1.0mm stainless steel plate with sulfuric acid, and then clean it. Add dysprosium trioxide or sam...

Embodiment 3

[0029] Embodiment 3, production of copper-based contact material with composite layer of silver / ytterbium trioxide / carbon coating

[0030] (1) preparation of silver electroplating solution: (1) with embodiment one.

[0031] (2) electroplating: (2) with embodiment one. It is better to pre-plate a thin layer of nickel before the copper-based contact material is electroplated with silver, so that the copper will diffuse into the silver during the subsequent high-temperature treatment, but the shape of the cathode should be determined according to the situation, generally according to the size of the contact. Classification: Contacts with a weight of less than 1 gram are blanked after one-sided electroplating and compounding with plates; contacts with a weight of more than 1 gram are first prepared as contacts and then embedded in stainless steel film for single-sided electroplating and compounding. The surface of the film should be brushed Insulate the protective layer, thereby ...

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Abstract

An electrical contacts material production method: adding additive to silver plating solution or copper plating solution, using silver plate or silver-nicked plate or copper plate as anode, stainless steel plate or copper base contact material as cathode, cathode current density being 1.5-10A / dm<2>, plating current adopting direct current source or impulsing power source, shielding cathode using plastic positioner or stainless steel caul, plating speed being 50-200mu m / h, obtaining plating layer, thickness >=0.5mm disposing plating sheet taking down from stainless steel or copper base contact material in isostatic pressing sintering furnace, sintering temperature being 930 DEG C or 650 DEG C, pressure 6-9Mpa, protective gas: nitrogen, argon gas, heat preservation time 2-3hours. Contact prepared from contact material of the invention is tested on circuit breaker and contactor, whose electric life and breaking capacity exceeds the counterpart made using ordinary method.

Description

1. Technical field [0001] The invention relates to a production method of an electric contact material. 2. Background technology [0002] At present, most of the contact materials need to add a certain amount of high melting point metal or oxide to the pure metal, so as to improve its breaking ability and anti-arc burning ability. However, it is required that the additives can be dispersed in the matrix. The present production methods only have the internal oxidation method and coated powder method to meet the required requirements. However, the general method of powder mixing and co-precipitation cannot meet its performance requirements. However, the types of contact materials produced by the internal oxidation method are particularly limited. What can be realized now are mainly a few materials in the silver-based materials (such as AgCdO), and the copper-based contact materials cannot be produced by the internal oxidation method. However, the coating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00
Inventor 陈少贤陈克
Owner 浙江帕特尼触头有限公司