METHOD OF ELECTRIC ARC WELDING OF SPIRAL-SEAM PIPES

FIELD: technological processes. ^ SUBSTANCE: pipe blank is produced of a stripe by continuous forming. Electric arc welding of external and internal spiral work seams is performed with flux layer. Weld penetration comprises 60-80% of the pipe wall thickness. Reinforcing bead height H does not exceed...

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Hauptverfasser:	PERMJAKOV IGOR' L'VOVICH, KARDAEV NIKOLAJ EVGEN'EVICH, LJUCHKOV ANATOLIJ DEM'JANOVICH, MASHINSON IZRAIL' ZINOV'EVICH, CHELYSHEV VALERIJ VALENTINOVICH, LUBE IGOR' IVANOVICH, VJATCHENNIKOV VLADIMIR VLADIMIROVICH, RINNAJA NATAL'JA NIKOLAEVNA
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PUNCHING METAL SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	FIELD: technological processes. ^ SUBSTANCE: pipe blank is produced of a stripe by continuous forming. Electric arc welding of external and internal spiral work seams is performed with flux layer. Weld penetration comprises 60-80% of the pipe wall thickness. Reinforcing bead height H does not exceed the value of H=0.8deltaK, mm, where delta is the pipe wall thickness in mm; K is an index within the range of 0.45-0.20 in inverse ratio to the pipe wall thickness. ^ EFFECT: improved internal seam form due to optimised seam weld penetration and reinforcing bead height.