FIELD: manufacturing technology.
SUBSTANCE: invention relates to production of steel sheets by arc welding of lap welded joint, one of which has ultimate tensile strength of at least 780 MPa. Preliminarily, a reinforcing element connected to the surface of the first steel plate is formed on the surface of the first steel sheet on the side opposite the surface in contact with the second steel sheet. Overlapping is performed with arc welded metal coating of end parts of reinforcing element, first steel plate and surface of second steel plate. Reinforcing element can be made in form of reinforcing sheet or reinforcing bead of weld seam.
EFFECT: invention provides excellent tensile strength without increasing welding deformation.
12 cl, 16 dwg, 19 tbl, 4 ex
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