Flux-covered welding wire and preparation method thereof

Abstract

The invention relates to a flux-covered welding wire and a preparation method thereof. The flux-covered welding wire consists of a solid welding wire and a flux cover, wherein the flux cover wraps thesolid welding wire. The preparation method specifically comprises the steps of (1) selecting the solid welding wire as a metal core of the flux-covered welding wire; (2) adjusting the components andthe proportion of the composite flux cover, meanwhile, improving the technological performance according to the actual welding requirement, and taking the treated flux cover as a flux cover blank; and(3) adjusting the thickness, the preheating temperature, the coating speed, the curing temperature and the curing time of the flux cover, and uniformly and firmly coating the outside of the metal core with the flux cover blank. Compared with the prior art, the flux-covered welding wire and the preparation method thereof have the advantages that the problem that all-position welding, high automation degree, zero filling rate limitation and welding wire tip pipe-shaped melting cannot be achieved simultaneously is solved.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a coated welding wire and a preparation method thereof. Background technique [0002] Welding wire mainly includes solid welding wire and flux cored welding wire. Solid cored wire is made by smelting, pouring, forging, rolling, annealing and drawing, and is protected by adding gas or flux during welding; The cross-sectional shape of the welding wire made by drawing can be protected by adding gas or flux during welding, and can also be self-protected by adding arc stabilizing agents, slagging agents and gas-generating agents to the flux core. Welding rod refers to pressing and coating a certain composition of coating on the welding core outside the special metal welding core, and drying it at a specific temperature to make a strip-shaped welding material. During welding, the coating decomposes and melts to form gas and slag. It plays the role of mechanical protection, metallurgi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a coated welding wire and its preparation method in order to overcome the defects of the above-mentioned prior art, which can successfully combine the advantages of flux-cored welding wire, welding rod and solid welding wire to solve the problem of all-position welding, automatic Problems such as high degree, no filling rate limitation, and "tube" melting at the end of the welding wire cannot be achieved at the same time

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