Production process for multiple stranded electrodes for maritime work

Abstract

The invention relates to a production process for multiple stranded electrodes for maritime work. The production process comprises the following steps: skin film treatment, rough drawing, solid-solution treatment, fine drawing, cleaning and drying, stranding, and rope twisting, wherein single strand of the multiple stranded electrodes is formed by spirally twisting multiple peripheral monofilaments around a central filament, and multiple stranded electrodes are spirally twisted from single strands around the center; in a welding process, the multiple stranded electrodes, compared with a singlestranded electrode, can feed filaments to a weld pool quicker, so that a spiral arc is formed by automatic rotation, and therefore, the weld pool is stirred in real time, and refining of welding seamcrystal and escape of gas in welding seams are facilitated. Meanwhile, on the basis of controlling chemical components of a welding wire raw material, the surface quality and cleanliness of the multiple stranded electrodes produced by the process are basically consistent with those of single stranded electrode, so that use requirements of a marine environment can be met.

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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