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A copper-based silver-free contact and its preparation method

A silver contact and copper-based technology, applied in the field of copper-based silver-free contacts and their preparation, can solve problems such as high price and environmental pollution, and achieve the effects of low contact resistance, resistance to arc burnout, and excellent oxidation resistance.

Active Publication Date: 2018-04-20
JINGJIANG HAIYUAN NONFERROUS METAL MATERIAL
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Problems solved by technology

However, the AgCdO material will inevitably produce "cadmium toxicity" during use, and because this material is expensive and causes serious pollution to the environment during use, it is necessary to develop a new cheap and non-polluting new silver-free contact material Replace traditional silver-based materials

Method used

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Embodiment Construction

[0013] Among metal materials, copper is the metal with similar electrical conductivity, thermal conductivity, and arc resistance to silver. Therefore, copper is used as the basic material to develop electrical contact elements, but copper is easily oxidized is its biggest weakness. However, copper alloys have good oxidation resistance. Among them, copper-nickel series alloys have been widely used in many fields. Therefore, it is considered to use them as basic materials and add components that increase strength and burn loss to improve their comprehensive performance.

[0014] Dispersion-strengthened alloys are applied to electrical contact elements based on the characteristics of uniform precipitation and strengthening of alloying elements from solid solution at room temperature. The application of dispersion strengthened copper alloy in engineering has shown very obvious advantages. Various special-purpose copper alloys have been successfully developed and applied to actual ...

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Abstract

A copper-based silver-free contact and a preparation method thereof. The formula of the copper-based silver-free contact is proportioned by weight percentage as follows: copper 65-85%; nickel 10-35%; molybdenum 3-9%; silver 0.5-1.5% %; Chromium 0.2~0.5%; Rare Earth 0.05~0.1%, its preparation method: mixing of non-ferrous metals and master alloys-smelting-casting-solution softening treatment-hot rolling-heat treatment-mechanical processing-stamping blanking-aging treatment-inspection Packaged finished product. The invention has good electrical conductivity, thermal conductivity, resistance to arc burning, anti-welding, low manufacturing cost, non-toxic and pollution-free.

Description

Technical field: [0001] The invention relates to an electrical contact element, in particular to a copper-based silver-free contact and a preparation method thereof. Background technique [0002] At present, the manufacturing materials of electrical contact elements are mainly silver-based composite materials. It has the characteristics of good electrical wear resistance, welding resistance, arc erosion and conductivity, so it is widely used in multi-level voltage electrical appliances from several volts to thousands of volts. In practical application, AgCdO, AgNi, AgW, and AgC four series of silver-based contact materials have been industrialized. The most typical material is AgCdO. AgCdO is called a universal contact due to its excellent properties above. However, the AgCdO material will inevitably produce "cadmium toxicity" during use, and because this material is expensive and causes serious pollution to the environment during use, it is necessary to develop a new cheap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/03
Inventor 宋和明胡登伟
Owner JINGJIANG HAIYUAN NONFERROUS METAL MATERIAL
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