METHOD OF HIDDEN-ARC WELDING, WELD JOINT THUS PRODUCED, AND STEEL PIPELINE OR PIPE WITH WELDED JOINT

摘要

FIELD: metallurgy.SUBSTANCE: invention can be used in production of butt welded joint of steel sheets by hidden-arc welding. Welding is carried out after welding steel sheets top side of lower side to make the weld, cross section of which is characterized by specified parameters taking into account fusion line inclination. Amount of fed welding heat during welding is selected with account of steel sheet wall thickness wherein Q ≤ 1.3×t, where Q, KJ/cm - total heat supply with due allowance for welding heat lower side and welding heat upper side of the steel sheet t is thickness of steel sheet.EFFECT: method provides stable high strength welded zone heated during welding.9 cl, 3 dwg, 5 tbl