OBTAINED BY POINT ARC WELDING CONNECTION AND METHOD OF ITS MANUFACTURE Russian patent published in 2017 - IPC B23K9/07 B23K9/23 

FIELD: metallurgy.

SUBSTANCE: invention can be used in the production of a lap welded joint by a metal electrode in a shielding gas environment by arc welding of overlapping steel sheets of high-strength steel, one of which contains carbon in an amount of not less than 0.3 wt % and the other at least 0.07 wt %. The first weld metal weld bead has a first reinforcement portion projecting outwardly from the rear face of the second steel sheet. The second roller formed over the first roller has a second reinforcement portion projecting outwardly from the front face of the first steel sheet. When welding sheets of the same thickness, the average value W (mm) of the diameter of the equivalent circle of the first and second weld beads of the welded point is determined from the expression 3t≤W≤10t, where t is the thickness of the sheet (mm) and the smaller height h (mm) from the first and Of the second strengthening regions is defined as h≥t/5. When welding sheets of different thicknesses t (mm) - the thickness of a thinner steel sheet.

EFFECT: joint has a high tensile and shearing strength.

18 cl, 8 dwg, 2 tbl