METHOD FOR OBTAINING ALUMINIUM STEEL JOINT BY FUSION WELDING Russian patent published in 2015 - IPC B23K9/23 B23K33/00 B23K103/20 

FIELD: metallurgy.

SUBSTANCE: aluminium steel joint is obtained by fusion welding of a transient two-layered aluminium steel-element with elements from the same materials by fillet welds. Welding is performed with incomplete penetration of each of the layers of the transient element. Legs of the welds adjacent to the transient two-layered element are at least 1.5 and not more than 2.0 of its thickness on the side of the aluminium layer and at least 1.0 and not more than 1.5 of its thickness on the side of the steel layer, and the weld leg adjacent to the aluminium element being welded is within 1.0 to 1.5 of the value of the weld leg adjacent to the aluminium layer of the transient element.

EFFECT: method allows excluding the formation of delaminations at the boundary of the layers of the aluminium-steel element and provides the achievement of fatigue strength and operating reliability of weld joints.

2 dwg, 1 ex, 2 tbl