Silver plating method for electric contact

A technology for electric contacts and silver plating, applied in sputtering plating, ion implantation plating, vacuum evaporation plating, etc., can solve problems such as unreliable bonding of plating layers, personal injury, and highly toxic cyanide. Achieve the effect of simple and stable preparation method, less process and high density

Active Publication Date: 2018-01-09
SHAANXI SIRUI ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the most common silver plating process for electrical contacts is silver electroplating, which adopts the method of rack plating with cyanide plating solution, and has the following problems: (1) rack plating is suitable for single-piece and small-batch production, and the production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1

[0022] A method for silvering an electrical contact, comprising the steps of:

[0023] (1) The surface of the electric contact is degreased, derusted, cleaned and dried; the material of the electric contact is pure copper, and the shape is a rotary body, and the surface of the electric contact is polished with a polishing machine After treatment, put the electrical contacts in a neutral degreasing and derusting agent, use an ultrasonic cleaner to clean the electrical contact samples at a frequency of 20KHZ for 10 minutes, and then put the cleaned electrical contacts in a vacuum dryer to dry for 1 minute.

[0024] (2) Put the electrical contacts into the plating chamber, then pump the vacuum of the plating chamber to 10-5Pa, and then pass in argon gas, wherein the flow rate of argon is 30CCM, and the vacuum degree is kept at 0.5Pa;

[0025] (3) Turn on the pulse Ag target power supply and the pulse negative bias power supply to carry out ion bombardment clea...

Example Embodiment

[0029] Example 2

[0030] A method for silvering an electrical contact, comprising the steps of:

[0031] (1) Carry out degreasing and derusting treatment on the surface of the electric contact, and clean and dry; the material of the electric contact is CuCr1 material, and the shape is a revolving body, and the surface of the electric contact is polished and polished by a polishing machine, and then Put the electrical contacts in a neutral degreasing and derusting agent, use an ultrasonic cleaner to clean the electrical contact samples at a frequency of 30KHZ for 15 minutes, and then put the cleaned electrical contacts in a vacuum dryer to dry for 3 minutes.

[0032] (2) Put the electrical contacts into the plating chamber, then pump the vacuum of the plating chamber to 10-5Pa, and then pass in argon gas, wherein the flow rate of argon is 140CCM, and the vacuum degree is kept at 1Pa.

[0033] (3) Turn on the pulse Ag target power supply and the pulse negative bias power suppl...

Example Embodiment

[0037] Example 3

[0038] (1) The surface of the electric contact is degreased, derusted, and cleaned and dried; the material of the electric contact is CuCr1Zr material, and the shape is a plate, and the surface of the electric contact is polished and polished by a polishing machine, and then Put the electrical contacts in a neutral degreasing and derusting agent, use an ultrasonic cleaner to clean the electrical contact samples at a frequency of 50KHZ for 20 minutes, and then put the cleaned electrical contacts in a vacuum dryer to dry for 5 minutes.

[0039](2) Put the electrical contacts into the plating chamber, then pump the vacuum of the plating chamber to 10-4Pa, and then pass in argon gas, wherein the flow rate of argon is 250CCM, and the vacuum degree is kept at 1.5Pa;

[0040] (3) Turn on the pulsed Ag target power supply and the pulsed negative bias power supply to perform ion bombardment cleaning on the electrical contacts; wherein, the ion bombardment cleaning pa...

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Abstract

The invention discloses a silver plating method for an electric contact. The silver plating method for the electric contact includes the following steps that firstly, surface oil removing and rust removing treatment is performed on the electric contact, and cleaning and drying are performed; secondly, the electric contact is placed in a plating chamber, then the plating chamber is vacuumized to 10<-5>Pa to 10<-4>Pa, then argon gas is introduced, and the vacuum degree is kept smaller than 2Pa; thirdly, a pulse Ag target power source and a pulse negative bias power source are started to performion bombardment cleaning on the electric contact; fourthly, the gas discharging current density of a cathode is adjusted to be in micro arc discharging, silver plating is performed through a micro arcion plating method with the current density larger than 0.1 A/cm<2> and smaller than 1 A/cm<2>, and the silver plating time is 1-2 h, and the silver plated electric contact is obtained; and fifthly,temperature lowering and cooling are performed, and after temperature lowering along a furnace is performed till room temperature is achieved, the silver plated electric contact is taken out. Silver plating treatment is performed on the electric contact through the micro arc ion plating method, and the beneficial effects of environment friendliness, better clad layer binding force, high efficiencyand the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of electric contact manufacturing, and in particular relates to a silver-plating method for electric contacts. Background technique [0002] High-voltage circuit breakers and isolating switches are the most important components in power systems. Electrical contacts are indispensable electrical contact devices for high-voltage switches such as circuit breakers and isolating switches. It is extremely important to have high reliability. In order to reduce the contact resistance, the contact part of the conductive contact is plated with a layer of silver by electroplating to prevent oxidation of the contact and improve conductivity. Since the contacts of the switchgear have a "self-cleaning" function during operation, that is, the surface needs to be self-cleaned by friction when the contacts are closed. strength is especially important. [0003] Silver coating is a kind of precious metal coating. As a functio...

Claims

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Application Information

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IPC IPC(8): C23C14/16C23C14/32
Inventor 周宁周兴莫文雄黄青丹唐文宋浩永王炜焦医辉徐秀琴
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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