Manufacturing method of composite silver ribbon

Abstract

The invention discloses a method for manufacturing a compound silver band and relates to a method for manufacturing electric contact materials. The method for manufacturing the compound silver band comprises the working process that a silver oxidization band and a copper band are treated at the earlier stage; the copper band is heated; the silver oxidization band and the copper band are compounded; a compounded band is annealed; the compounded band is precisely rolled; the stress of the compounded band is eliminated; oxidation resistance of the compounded band is achieved; the compounded band is split; the compounded band is detected. Compared with the prior art, in the machining process, the silver metallic oxidization band and the copper band do not need to be heated at the same time, so that a reduction reaction generated by a protective atmosphere and the silver metallic oxidization band in the heating process is avoided, and silver metallic oxide is prevented from being reduced. Meanwhile, the silver metallic oxidization band is placed in a groove formed in the copper band and then rolled, the combination strength is higher, and the compounding firmness is better. When the method is used for manufacturing the compound silver band, the requirement for manufacturing devices is low, machining is easy, the band is long, automatic convenient machining and manufacture in large bathes are achieved, and therefore cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of electrical contact materials, in particular to a method for manufacturing a silver-copper composite strip. Background technique [0002] Electric contacts are contact elements of electrical switches and instruments. It is mainly responsible for connecting and breaking currents. It plays a decisive role in the safe operation of electrical appliances. Among the materials for producing electrical contacts, silver metal oxides (such as silver Tin Oxide AgSnO 2 , Silver cadmium oxide (AgCdO) materials are widely used in low-voltage electrical appliances due to their good resistance to electrical wear, welding resistance and electrical conductivity. Silver tin oxide / copper composite material is a new type of functional material composed of silver metal oxide and copper through a special composite process. It not only retains the main characteristics of silver metal oxide and substrate copper, but also can It ...

AI Technical Summary

Problems solved by technology

However, the bonding strength between silver metal oxide and copper is relatively poor. At present, the focus of domestic research on silver-copper composite materials is the strip composite and surface composite of silver-copper alloy and oxygen-free copper. These are basically not the combination of silver oxide and copper. complex

Now individual enterprises produce silver metal oxide and copper composite materials by first welding the edges of the silver metal oxide plate ingot and the thick copper ingot with argon arc welding, and then welding them together under the protection of reducing gas. The hot rolling mill performs repeated hot rolling and compounding. During the hot rolling process, the silver metal oxide will react with the reducing gas to reduce the silver metal. The silver oxide content in the silver-copper composite material produced in this way is not high. At the same time, this The production method cannot be produced on a large scale, and only a section of strip with a small length can be processed each time. This process cannot be used for continuous processing, and the production efficiency is extremely low.