Silver coating material and method for manufacturing same

A technology of coating material and manufacturing method, applied in contact materials, contacts, electrical components, etc., can solve the problems of deterioration of wear resistance and brittle film, and achieve the effect of excellent wear resistance

Active Publication Date: 2016-01-13
JX NIPPON MINING & METALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In general, increasing the hardness of the coating is effective in improving the wear resistance. There have been attempts to increase the hardness of the coating by adding a hardener such as Sb to silver, but the coating became brittle and the wear resistance deteriorated.

Method used

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  • Silver coating material and method for manufacturing same
  • Silver coating material and method for manufacturing same
  • Silver coating material and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Phosphor bronze (C5210, 25mm×20mm×thickness 0.2mm) is sequentially plated to form a 0.05μm thick silver strike layer and a 0.4μm thick silver layer obtained by plating with a high-cyanide silver bath. The plated substrate was used as the test material.

[0071] Under the conditions of Example 1 in Table 1, the above-mentioned plated substrate was heat-treated using a hot plate in the air. The heat treatment temperature is a temperature obtained by measuring the temperature of the plated substrate placed on the heating plate with a thermocouple.

Embodiment 2 and Embodiment 3

[0073] Phosphor bronze (C5210, 25mm×20mm×thickness 0.2mm) is sequentially plated to form a 3μm thick copper plating layer obtained by copper cyanide bath plating, a 0.05μm thick silver strike plating layer, and a 0.4μm thick The silver-plated layer obtained by high-cyanide silver bath plating is used as the test material.

[0074] Under the conditions of Example 2 and Example 3 in Table 1, the above-mentioned plated substrate was heat-treated using a hot plate in the air.

Embodiment 4

[0076] Phosphor bronze (C5210, 25mm×20mm×thickness 0.2mm) is sequentially plated to form a 3μm-thick nickel plating layer obtained by sulfamic acid bath plating, a 0.05μm-thick silver strike plating layer, and a 0.4μm-thick The silver-plated layer obtained by high-cyanide silver bath plating is used as the test material.

[0077] Under the conditions of Example 4 in Table 1, the above-mentioned plated substrate was heat-treated using a hot plate in the air.

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Abstract

The purpose of the present invention is to provide a silver coating material having exceptional wear resistance so that, even when the silver coating material is used as a movable contact and / or a fixed contact of a switch that is used for a long period of time under a condition in which switching is repeatedly performed, a silver or silver alloy layer on a surface does not scrape off, and the contact resistance thereof does not increase. A silver coating material having a layer comprising at least silver or a silver alloy as the outermost layer on an electroconductive substrate, wherein the amount of the coating scraped off in a wear resistance test is less than 40 mg and the initial contact resistance and the contact resistance after performing a sliding wear test under a specific condition are less than 10 m omega. In addition, a silver coating layer in which the aforementioned layer comprising silver or a silver alloy is formed by plating and heat-treated for 1-299 seconds at 200-500 DEG C.

Description

technical field [0001] The present invention relates to a silver coating material and a method for producing the same, and more particularly to a silver coating material suitable as a connector, a switch, a terminal, and a contact part of an electronic component. Background technique [0002] Connectors and switches, which are connecting parts for electronic equipment, are often used in which brass or phosphor bronze is coated with a base plating of copper or nickel, and a silver plating layer is further applied to the base plating. Since silver is a good conductor of electricity and heat, silver is used as a plating for connectors, switches, or lead frames, etc. as described above. [0003] In recent years, it is known that switches used in mobile phones and remote controllers have a large number of repeated switching operations. By repeating many switching operations in a short period of time, the silver plating layer is reduced and the contact resistance increases. [00...

Claims

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Application Information

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IPC IPC(8): H01H1/04C25D5/50C25D7/00H01B5/02
CPCC25D5/50H01H1/021H01H1/025H01H2011/046C25D3/46C25D5/10C25D5/12C25D5/617
Inventor 相场玲宏高桥祐史大内高志远藤智村上龙宫泽聪小田岛正彦德田博行
Owner JX NIPPON MINING & METALS CO LTD
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