Aluminum-based welding wire for aluminum/steel filler wire friction stir welding and preparation method thereof

The invention discloses an aluminum-based welding wire for aluminum/steel filler wire friction stir welding. The aluminum-based welding wire for aluminum/steel filler wire friction stir welding comprises the following components of, in percentage by weight, 5-10% of silicon, 3-5% of copper, 4-10% of nickel, smaller than or equal to 3% of cobalt, and the balance of aluminum. The aluminum-based welding wire for aluminum/steel filler wire friction stir welding can fully meet the requirement of industrial production of aluminum/steel filler wire friction stir welding and improve the tensile property, the plastic toughness and the bending property of an aluminum/steel friction stir welding joint. The invention also discloses a preparation method of the aluminum-based welding wire for aluminum/steel filler wire friction stir welding, the preparation method is relatively fine, a cast ingot does not need to be rolled, and the fault tolerance rate is high. 本发明公开了一种用于铝/钢填丝搅拌摩擦焊的铝基焊丝，按重量百分比计包括如下组分：硅5～10％，铜3～5％，镍4～10％，钴≤