Flux-cored wire and preparation method and application thereof

The invention provides a flux-cored wire and a preparation method and application thereof, and particularly relates to the technical field of welding materials. The flux-cored wire comprises an outer skin and a flux core filled in the outer skin, and the flux core comprises, by mass, 75%-78% of high-carbon ferrochrome, 5%-8% of atomized iron powder, 2%-3% of manganese metal, 0.5%-1% of ferrotitanium, 9%-10% of graphite, 3%-5% of ferrovanadium and 1%-2% of boron carbide. The flux-cored wire has the advantages of being stable in welding arc, easy in slag removal, smooth in wire feeding, good in post-welding effect, good in hardness and excellent in impact resistance, is applied to the fan blade, and can be used for strengthening and repairing the surface of the blade and prolonging the service life of the blade. 本发明提供一种药芯焊丝及其制备方法和应用，具体涉及焊接材料技术领域。所述药芯焊丝包括外皮和填充在所述外皮内部的药芯，以所述药芯的质量百分数计，所述药芯包括以下组分：高碳铬铁75％～78％，雾化铁粉5％～8％，金属锰2％～3％，钛铁0.5％～1％，石墨9％～10％，钒铁3％～5％，碳化硼1％～2％。本发明的药芯焊丝具有焊接电弧稳定，易脱渣，送丝顺畅，焊后效果良好，具有较好的硬度和优良的抗冲击性能，应用于