Low-temperature preheating high-strength flux-cored wire and production process thereof

Abstract

The invention discloses a low-temperature preheating high-strength flux-cored wire and a production process thereof, belongs to the technical field of welding materials and can solve the problems that a high-strength plate high-temperature heating welding process is complicated, long in cycle and high in cost, and product quality cannot be ensured by a production process in the prior art. The low-temperature preheating high-strength flux-cored wire comprises a steel tape sheath and powder, the steel tape sheath is provided with an O-shaped section, and the powder is placed in the steel tape sheath and comprises, in weight percentage, 0.03-0.042% of C, 0.47-0.49% of Si, 1.56-1.87% of Mn, 0.013-0.015% of P, 0.009-0.0092% of S, 1.18-1.52% of Ni, 0.12-0.25% of Cr, 0.298-0.37% of Mo, 0.003-0.004% of V and 0.013-0.014% of Cu. The balance is the steel tape sheath, a steel tape is longitudinally sheared, a welding wire is pre-formed and secondarily formed, and the flux-cored wire is produced by a fine drawing process. The welding process can be simplified, and the quality of the flux-cored wire can be improved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a low-temperature preheating high-strength flux-cored welding wire and a production process thereof. Background technique [0002] Flux-cored wire is the most advanced new welding material in the world, and belongs to the fourth generation of welding material. At present, all developed countries are actively developing and producing, and have been applied in large quantities in the welding of metal structures such as large structural parts and heavy machinery. As the strength of the steel used for structural parts is getting higher and higher, the solid core welding wire can no longer meet and meet the design requirements, especially the performance of the solid core welding wire above 70 kg is more difficult to guarantee. Disadvantages such as large spatter of solid wire, difficult slag removal, and poor weld appearance. Therefore, all countries regard fl...

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Problems solved by technology

[0005] The present invention provides a low-temperature preheating high-strength flux-cored welding wire and its production process in order to solve the problems in the prior art that the high-strength plate high-temperature heating welding process is complicated, the cycle is long, the cost is high, and the production process cannot guarantee product quality.

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