| abstract |
The invention discloses a welding wire and its preparation method, application and welding method. The welding wire includes a sheath and a flux core; based on the total mass of the sheath, the sheath contains more than 80wt% of aluminum and 2-20wt% of silicon; based on the total mass of the flux core, the flux core contains 30 ～60wt% fluoride flux, 15～40wt% zinc element, 15～35wt% tin element, 5～20wt% nickel element, 0.5～5wt% zirconium element and 0.5～3wt% rare earth element; The mass meter of the corresponding rare earth oxide. The welding wire can improve the strength of the welded joint of aluminum-containing metal/steel dissimilar metal materials. |