A production process of multi-strand welding wire for marine engineering

Abstract

The invention relates to a production process of multi-strand welding wire for marine engineering, comprising the following steps: film treatment, rough drawing, solution treatment, fine drawing, cleaning and drying, twisting into strands, stranding into rope; multi-strand welding wire The single strand is formed by twisting a plurality of peripheral monofilaments in a spiral shape around the central wire, and then twisting the single strand in a spiral shape around the central strand into a multi-strand stranded welding wire; Compared with multi-strand stranded welding wire, the wire-feeding welding pool can automatically rotate to form a spiral arc, which can stir the molten pool in real time, which is beneficial to the refinement of weld crystallization and the escape of gas in the weld. At the same time, on the basis of controlling the chemical composition of the raw material of the welding wire, the surface quality and cleanliness of the multi-strand stranded welding wire produced by the invention are basically the same as those of the single-strand stranded welding wire, which can meet the use requirements of the marine environment.

Description

technical field [0001] The invention belongs to the technical field of production and processing of metal wires, and in particular relates to a production process of multi-strand stranded welding wire for marine engineering. Background technique [0002] Stranded welding wire has the advantages of heat input, high cladding rate, uniform chemical composition of surfacing metal, excellent structure and performance, especially the significantly reduced cost of surfacing welding, and has excellent application and promotion prospects. At present, the stranded welding wire is mostly single-strand structure, mainly because the welding wire has high requirements for surface quality and cleanliness, so as to ensure the stability of the weld seam of the stranded welding wire after welding. Multi-strand welding wire is formed by helically twisting multiple single wires according to a certain structure. Due to the diversity of parameters such as the structure, twist length, and strandin...

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Problems solved by technology

[0003] Compared with the single-stranded welding wire, the structure of the multi-strand stranded welding wire is complicated, and it is difficult to ensure the surface quality and cleanliness. The corrosion resistance of the welding seam of the welding wire puts forward higher requirements

[0004] Chinese patent CN101559543A discloses a multi-strand stranded welding wire, in which multiple strands of solid-cored welding core and flux-cored welding wire are mixed and twisted together, or multiple strands of flux-cored welding wire are twisted together to obtain a larger penetration depth, Fusion width, or wide and thick surfacing layer, but it does not have corrosion resistance, so it cannot be used in the field of marine engineering

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