Preparation method of gold-containing three-layer micro-profile electrical contact material

Abstract

The invention relates to a preparation method of a gold-containing three-layer micro deformed electric contact material. The material is characterized in that a surface layer material is pure gold, an intermediate layer of the material is silver or silver alloy, a basic material is a copper alloy layered composite deformed band material, the thickness of the band material is 0.2mm to 1.5mm, the width of the band material is 0.3mm to 3mm, the thickness of the intermediate layer of the silver or silver alloy is more than or equal to that of the basic material, and the thickness of the gold layer is less than or equal to 0.005mm. By adopting a method for combining a secondary compositing technology and a deformed precision machining technology, the prepared gold-containing three-layer micro deformed electric contact material has the advantages that the production efficiency is high, the size consistency is good, the compositing firmness is high, the metal layer is not diffused, the chemical stability is high, the electric contact performance is stable and reliable, and the like, and the production flow of the preparation method is short.

Description

technical field

[0001] The invention relates to a material compounding method, in particular to a preparation method of a gold-containing three-layer micro-shaped electrical contact material. Background technique

[0002] The gold-containing three-layer micro-shaped electrical contact material is a type of special-shaped composite material with a small cross-section to meet the needs of the development of relays and switch thermostats in the direction of miniaturization, high precision, and integration. Gold-containing three-layer micro-shaped electrical contact materials are usually composed of substrate copper alloy, precious metal silver alloy and gold alloy, and its cross-sectional area is ≤1mm 2 , and the cross-section is irregular, mostly triangular, trapezoidal and other shapes, which changed the early single noble metal and its alloy materials in many fields often could not meet the special performance requirements. Therefore, materials with different properties are ...

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