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Method for improving wear resistance of surface of connector pin

A connector, wear-resistant technology, applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problems of low reliability of electrical contact, poor bonding force of gold plating, high porosity, etc., and achieve excellent Excellent electrical contact performance and wear resistance, excellent coating performance, and low porosity

Inactive Publication Date: 2022-04-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low electrical contact reliability caused by the poor bonding force, low hardness, and high porosity of the gold plating layer formed on the surface of the connector pin by the existing electroplating technology, the present invention provides an improved connector Method for wear resistance of contact pin surface

Method used

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  • Method for improving wear resistance of surface of connector pin
  • Method for improving wear resistance of surface of connector pin
  • Method for improving wear resistance of surface of connector pin

Examples

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Embodiment 1

[0022] This embodiment provides a method for improving the wear resistance of the connector pin surface. The acetone and absolute ethanol used are commercially available analytical grade reagents, and the purity of the copper target, nickel target, and gold target are all 99.99%. %. Specifically include the following steps:

[0023] Step (1) First select the pins of wire spring wire connectors as the base material, and the pins are pure copper pins. Put the base into acetone and ultrasonically clean it for 10 minutes, rinse it with deionized water, and then dry it. The dried substrate was ultrasonically cleaned in absolute ethanol for 10 minutes, washed with deionized water and then dried;

[0024] Step (2) Put the pretreated substrate into the vacuum chamber and coat the stainless steel tube, connect a DC power supply for glow cleaning, wherein, the working conditions of the DC glow cleaning are: the substrate is used as the negative electrode, the stainless steel tube is us...

Embodiment 2

[0031] This embodiment provides a method for improving the wear resistance of the connector pin surface. The acetone and absolute ethanol used are commercially available analytical grade reagents, and the purity of the copper target, nickel target, and gold target are all 99.99%. %. Specifically include the following steps:

[0032] Step (1) First select the pin of the wire spring wire connector as the base material, and the pin is beryllium bronze (QeB 2 ) into the needle, put the substrate into acetone for 10 minutes of ultrasonic cleaning, rinse with deionized water and dry, put the dried substrate into absolute ethanol for 10 minutes of ultrasonic cleaning, wash with deionized water and then dry;

[0033] Step (2) Put the pretreated substrate into the vacuum chamber and coat the stainless steel tube, connect a DC power supply for glow cleaning, wherein, the working conditions of the DC glow cleaning are: the substrate is used as the negative electrode, the stainless steel...

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Abstract

The invention discloses a method for improving the wear resistance of the surface of a connector pin. The method comprises the following steps: (1) cleaning a substrate; (2) putting the substrate into a vacuum chamber, sleeving a stainless steel pipe outside the vacuum chamber, and connecting a direct-current power supply for direct-current glow cleaning; (3) the substrate is placed in a vacuum cavity of a multi-target co-sputtering system, and copper, nickel and gold target materials are installed on the three sputtering targets respectively; step (4) when the background vacuum degree in the vacuum cavity is 1t; when the pressure is 1.0 * 10 <-4 > Pa, sputtering deposition of a copper target material, a nickel target material and a gold target material is carried out in sequence, and a Cu-Ni-Au composite coating is formed on the surface of the substrate; and (5) the vacuum degree of the vacuum cavity is recovered to atmospheric pressure, the sample is taken out, and the connector pin with the Cu / Ni / Au composite coating is obtained. The prepared Cu / Ni / Au composite coating has excellent electric contact performance and wear resistance, and the wear resistance is superior to that of an electroplating process used at present.

Description

technical field [0001] The invention belongs to the field of electromechanical components, and relates to a method for improving the wear resistance of the surface of a connector pin, in particular to a method for preparing an Au-Ni-Cu composite coating on the surface of a connector pin based on a magnetron sputtering method. Background technique [0002] As a noble metal with stable chemical properties and low resistivity, gold is widely electroplated on the contact system surface of electromechanical components. Although the gold plating process has been developed for nearly 200 years, there are still many difficult process problems for connector pins, such as high porosity, poor thickness consistency, low hardness, and poor substrate bonding. wait. The above process defects are important factors that cause the coating to be non-wear-resistant, short-lived, and prone to failure, which seriously affects the electrical contact reliability of the connector during use. In ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/02C23C14/54
CPCC23C14/352C23C14/165C23C14/021C23C14/54
Inventor 周学张月王旭翟国富
Owner HARBIN INST OF TECH
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