Flux-cored welding wire

Abstract

The invention relates to the field of welding materials, in particular to a flux-cored welding wire comprising a steel cover and a core flux wrapped by the steel cover. The section formed by wrappingthe core flux through the steel cover is shaped like a plum blossom, wherein the steel cover on the outer layer is equally divided, the two ends of each section of the equally-divided steel cover extend towards the center of the section to form a petal of the structure shaped like the plum blossom, and the petals make tight contact with one another to form the plum blossom shape. After the structure mentioned above is adopted, because the steel cover is evenly distributed on the whole fracture surface, a core part of the welding wire with the plum-blossom-shaped section can also conduct electricity; and therefore electric arc combustion is stable, welding wire fusion is uniform, and metallurgy reaction is sufficient.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a flux-cored welding wire. Background technique [0002] Flux-cored welding wire is another type of welding material widely used after welding rod and solid core welding wire. It is composed of metal sheath and core flux. In recent years, the amount of flux-cored welding wire in developed countries accounts for about 20% to 30% of the total welding materials, and it is still in a steady increase. The annual consumption of solid welding wire has entered a stable development stage, while the consumption of flux cored welding wire still has a lot of room for development in terms of variety, specification and consumption. [0003] Such as figure 1 As shown, under normal circumstances, the cross-sectional shape of the flux-cored wire is "O", and such a wire is called a tubular flux-cored wire. Since the core flux of the tubular flux-cored wire is non-conductive, the arc is easy to ...

AI Technical Summary

Problems solved by technology

Since the core flux of tubular flux-cored wire is non-conductive, the arc is easy to rotate along the surrounding steel skin, and the arc stability is poor, which affects the final shape of the weld

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