Flux core powder for manufacturing seamless self-shielded welding wire

Abstract

The invention relates to flux core powder for manufacturing a seamless self-shielded welding wire. The skin of the seamless self-shielded welding wire adopts a mild steel strip, and the flux core powder is synchronously added to the mild steel strip on line. 100 parts of flux core powder comprises the ingredients: 35-50 parts of barium lithium fluoride, 3-5 parts of magnesium fluoride, 0-4 parts of sodium fluoride, 1-3 parts of calcium fluoride, 4-12 parts of iron oxide red, 1-3 parts of rare earth fluoride, 4-8 parts of metal manganese, 10-18 parts of aluminium magnesium alloy, 6-10 parts of metal nickel, 0.5-2 parts of metal zirconium, and the balance of iron powder. All the materials are mixed and stirred uniformly according to a customary method, so that the flux core powder is obtained; the mild steel strip is curled to form a linear seamed cylinder by roller molding, and the linear seamed cylinder wraps the flux core powder; the linear seamed cylinder is manufactured into a semi-finished product seamless self-shielded welding wire by using high-frequency induction or contact bond; the semi-finished product seamless self-shielded welding wire is subjected to annealing and reducing, and is subjected to copper plating, and then the seamless self-shielded welding wire is prepared. In order to prevent the flux core power from absorbing moisture, the skin can be subjected to copper plating, and thus, the rust resistance of the seamless self-shielded welding wire is improved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a flux core powder for making seamless self-shielding welding wire. Background technique [0002] Now the market mostly uses seamed self-shielding flux-cored welding wire. In order to achieve the self-protection effect, the welding wire contains a large amount of gas-generating agent and slag-generating agent in the core powder. The gas-generating agent and slag-generating agent are mainly mineral powder. . [0003] As we all know, mineral powder has the problem of easy moisture absorption, which will inevitably lead to problems such as easy moisture absorption and rust in the seamed self-shielding flux-cored welding wire mainly made of mineral powder, so the seamed self-shielding flux-cored welding wire is mostly used Vacuum packing method to prevent moisture absorption and rust problems of mineral powder. [0004] However, during field construction,...

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Problems solved by technology

[0007] In order to solve the above problems, the present invention provides a flux core powder for making seamless self-shielding welding wire, the seamless self-shielding welding wire equipped with the flux core powder solves the problem that the seam self-shielding welding wire is easy to absorb moisture, easy to grow Rust and other problems, because the outer skin is a seamless structure that can prevent the core powder inside from absorbing moisture, and at the same time, it can also achieve copper plating on the outer skin to improve the anti-rust ability of the seamless self-shielding welding wire, which is widely used in X80 pipelines Steel, long-distance pipelines, oil storage tanks, bridges, offshore platforms, high-rise steel structure buildings, etc.

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