Flux-cored wire capable of improving welding performance and preparation method of flux-cored wire

Abstract

The invention discloses a flux-cored wire capable of improving welding performance and a preparation method of the flux-cored wire. The preparation method comprises the steps that a mixture of fluorinated graphene and titanium carbide powder is added into an original slag-free self-protection flux-cored wire, and the mixture is prepared from following components in percentage by mass: 6.5% of Mg powder, 35% of Fe powder, 2.0% of Al powder, 11.5% of Cr powder, 3.0% of V powder and 0.05% of the mixture prepared from fluorinated graphene and titanium carbide. Compared with the prior art, the flux-cored wire of the scheme has the beneficial effects that the molten drop transition period of the welding wire is prolonged, the metallurgical reaction behavior is intensified, and therefore, the self-protection effect of the welding wire is further optimized; the splashing rate after improvement is relatively low; and the action effect on a molten pool is enhanced, slag splashing behaviors are relatively few, the deposition efficiency is improved, a certain influence is achieved on macroscopic forming of a weld joint, and the abrasion resistance and the oxidation resistance are enhanced. Thewelding wire is prevented from being affected with damp, and air pores are reduced; and the flux-cored wire has the effects of refining grains, improving the weld joint hardness and improving the impact toughness.

Description

technical field [0001] The invention relates to the field of welding materials, and specifically refers to a flux-cored welding wire for improving welding performance and a preparation method thereof. Background technique [0002] At present, among many welding materials, slag-free self-shielding flux-cored wire has a high degree of automation, no need for additional gas supply, high efficiency and energy saving, no need for slag cleaning in multi-layer welding, and obvious energy saving and consumption reduction effects. It is one of the welding materials with the most development potential. But at the same time, there are also problems such as poor self-protection effect, easy damp welding wire, pores in the weld bead, poor weld toughness, coarse grains due to overheating, and poor arc stability. [0003] Titanium carbide is a black powder with high temperature resistance, oxidation resistance, high strength, high hardness, good thermal conductivity, and good toughness. Ti...

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Problems solved by technology

[0005] In order to overcome the problems of poor self-protection effect, coarse crystal grains and poor arc stability of the existing slag-free self-shielding flux-cored welding wire, this solution prevents the welding wire from Moisture can refine grains, enhance wear resistance and oxidation resistance, increase weld hardness, and improve impact toughness

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