WELDING GROOVE OF LOW DUCTILE STEEL PIPE

PURPOSE:To prevent the generation of a crack whose start point is at a toe of welding bead without reducing the workability of welding process in a butt arc welding of a low ductile steel pipe. CONSTITUTION:A groove whose front surface of base material to be brought in contact with a front surface o...

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Bibliographic Details
Main Author INUI MASAHIRO
Format Patent
LanguageEnglish
Published 18.01.1994
Edition5
Subjects
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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Summary:PURPOSE:To prevent the generation of a crack whose start point is at a toe of welding bead without reducing the workability of welding process in a butt arc welding of a low ductile steel pipe. CONSTITUTION:A groove whose front surface of base material to be brought in contact with a front surface of a scheduled welding bead is made a quickly inclining surface against the front surface of the scheduled welding bead is worked at the place X of inner circumferential side whose crack start point is at the welding toe part is hardly generated after forming the welding bead among places in which the groove is to be worked against butted parts 1, 2, and the groove whose front surface of the base material being brought in contact with the front surface of the scheduled welding bead become the loosely inclining surface is worked at the place Y of outer circumferential side in which the crack being made the welding toe part as the start point is easily generated after forming the welding bead among places whose groove is to be worked against the butted parts 1, 2.
Bibliography:Application Number: JP19920170426