METHOD FOR NON-CONSUMABLE ELECTRODE WELDING OF CARBON AND LOW-ALLOY STRUCTURAL STEELS Russian patent published in 2023 - IPC B23K9/167 B23K9/235 B23K35/362 

FIELD: welding.

SUBSTANCE: invention relates to a technology for welding longitudinal and circumferential seams of products made of carbon and low-alloy structural steels with a thickness of 3.0 to 20.0 mm. Argon-arc welding with a non-consumable electrode is carried out. A flux paste is preliminarily applied to the surfaces to be welded in the form of a coating of Y₂O₃ or CaO powder with a grain size of up to 39 mcm, diluted in alcohol in a mass ratio of 1:3. An oxide coating is obtained with an oxide deposition density of 0.045-0.055 g/cm² and a relative mass concentration of oxide in the weld pool melt zone equal to 1.8-2.2%.

EFFECT: increasing the range of permissible deviations of the specified parameters of the welding process without deteriorating the mechanical properties of the welded joint for products with a thickness of 3-20 mm.

1 cl, 2 tbl