US 6,180,919 B2Granted

Method for making a welded joint

AssigneeOtkrytoe Aktsionernoe Obschestvo “Nauchno-Proizvodstvennoe Obiedinenie “Energomash”Imeni Akademika V.P. Glushko”

InventorsViktor Nikonorovich Semenov, Margarita Borisovna Pestova, Gennady Grigorievich Derkach, Anatoly Lukich Loginov, Oleg Andreevich Masljukov

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Abstract

The invention relates to the field of welding, more particularly, to methods of making welded joints for pieces of maraging steels, and may be used in different branches of machine building. Before welding, an intermediate element is resistance spot welded to one of the welded edges. The element is made of the product's material and covered with a layer of chromium. The joint is fit up by tacks on a weld backing made of the same material as the product. The tacks are made by a manual argon-arc welding by a nonconsumable electrode. The joint is argon-arc welded by two runs of a nonconsumable electrode at transverse oscillations of the same.

Claims6

Dependent claims

A method for making a welded joint, comprising the steps of:

resistance spot welding an intermediate element to an edge of one of pieces welded, said intermediate element being made of the same metal as that of the welded pieces,
argon-arc welding the pieces together with the intermediate element with argon being fed to a weld produced, wherein said intermediate element is covered with a layer of chromium before the welding, the welded pieces are fit up with the intermediate element positioned therebetween by tacking the pieces using a manual argon-arc welding with a nonconsumable electrode on a weld backing of the same metal as that of the pieces, said argon-arc welding being made by two runs of a nonconsumable electrode at transverse oscillations of the electrode relative to said weld,
keeping said weld backing after welding.

Dependencies are inferred from the claim text.