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Silver coating material and manufacturing method thereof

A technology of coating materials and manufacturing methods, applied in the direction of 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: 2017-08-18
JX NIPPON MINING & METALS CORP +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 manufacturing method thereof
  • Silver coating material and manufacturing method thereof
  • Silver coating material and manufacturing method thereof

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 object of the present invention is to provide a kind of silver coating material, even if it is used as the movable contact and / or the fixed contact of the switch that is used for a long time under the condition of repeated switching, the silver or silver alloy layer on the surface will not be damaged. Cutting, and contact resistance will not increase, excellent wear resistance. A silver-coated material, which has a layer containing at least silver or silver alloy as the outermost layer on a conductive base material, the film reduction amount in the wear resistance test is less than 40 mg, and the initial contact resistance and under specific conditions The contact resistance after the sliding wear test was less than 10 mΩ. A silver-coated material is formed by forming the layer containing silver or silver alloy by plating, and heat-treating at 200-500°C for 1-299 seconds.

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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Patent Type & Authority Patents(China)
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 CORP
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