Flux-cored wire for repairing brake disc of yaw system of wind turbine generator and repairing method

The invention provides a flux-cored wire for repairing a brake disc of a yaw system of a wind turbine generator. The flux-cored wire comprises a steel sheet and a powder flux core, the powder flux core comprises, by mass, 18%-45% of ferrosilicon powder, 1.5%-4.6% of ferromanganese powder, 15%-40% of ferrotitanium powder, 19%-60% of nickel powder, 0.02%-0.15% of cerium oxide, 0.4%-1.5% of tungsten carbide and the balance iron powder. Compared with the prior art, the tungsten carbide is added into the flux-cored wire and matched with carbide formed in the welding process, the abrasion resistance of a stacking and covering layer can be effectively improved, the good abrasion resistance effect in the braking process is achieved especially for the actual use working condition of the brake disc of the yaw system, and the service life of the repaired brake disc is prolonged. 本发明提供了一种风电机组偏航系统刹车盘修复用药芯焊丝，包括钢皮与粉末药芯；以质量百分比计，所述粉末药芯包括：硅铁粉18％～45％、锰铁粉1.5％～4.6％、钛铁粉15％～40％、镍粉19％～60％、氧化铈0.02％～0.15％、碳化钨0.4％～1.5％、铁粉余量。与现有技术相比，本发明