Preparation method and mold of seamless flux-cored zinc-aluminium alloy welding wire

Abstract

The invention discloses a preparation method of a seamless flux-cored zinc-aluminium alloy welding wire and a preparation mold. The preparation method comprises the following steps of: preparing a wire rod with a brazing flux; casting and configuring an extrusion billet; extruding the extrusion billet into a hollow pipe in the mold, and simultaneously, filling the wire rod with the brazing flux in the hollow pipe; preparing the seamless flux-cored zinc-aluminium alloy welding wire rod; and carrying out drawing and diameter reducing to the seamless flux-cored zinc-aluminium alloy welding wire rod to form the seamless flux-cored zinc-aluminium alloy welding wire. In the seamless flux-cored zinc-aluminium alloy welding wire prepared in the invention, the weight percentage of the brazing flux is 10-18%; the obtained seamless flux-cored zinc-aluminium alloy welding wire can have unlimited length, so that the following drawing and diameter reducing efficiency can be greatly improved; and the hollow pipe is radially extruded, so that certain ECAP (Equal Channel Angular Pressing) fine grain action to alloy structures can be realized, and further, the drawing property of an alloy material is better. The preparation method of the seamless flux-cored zinc-aluminium alloy welding wire and the mold, disclosed by the invention, have the advantages that mold has high production efficiency, the yield is high, and the brazing flux is less in loss, and is easy to store.

Description

technical field [0001] The invention belongs to the technical field of surface self-brazing wire processing of copper-aluminum dissimilar materials, and relates to a preparation method and equipment for a seamless flux-cored zinc-aluminum alloy welding wire. Background technique [0002] Copper is the first metal used by human beings. With its excellent performance, copper can be widely used in almost all fields. However, in the 21st century, the contradiction between copper consumption and its resources has become increasingly prominent. my country is a country that lacks copper resources and is also a country that consumes a lot of copper resources. Therefore, the shortage of global copper resources and the high growth in demand have led to a continuous and substantial rise in copper prices. Aluminum and copper have similar functions in terms of electrical conductivity and heat transfer, and the price and density of aluminum are only about one-third of copper. Therefore, a...

AI Technical Summary

Problems solved by technology

[0007] The above production processes 2 and 3, due to the use of a single wire billet for drawing and reducing, its weight is limited, when the packaging weight changes, there will be excess or insufficient packaging weight The product can only be treated as waste product, further reducing its yield

[0008] Flux-cored zinc-aluminum alloy welding wire first appeared in 2002. Although the research on flux-cored zinc-aluminum alloy welding wire has been deepening in recent years, there are also many related products The latest reports, such as the German ALCOS company launched the latest flux-cored zinc-aluminum alloy self-brazing wire products in 2007, which have made breakthroughs in alloy and flux components, but there has been no breakthrough in the production process, and hollow tubes are still used to fill flux production process

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