Title:
ONE SIDE WELDING METHOD BY CARBON DIOXIDE GAS ARC WELDING
Document Type and Number:
Japanese Patent JP3579573
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable a mothod to execute one side welding for a narrow groove V shape butt joint without generating a high temp. crack to a penetration bead.
SOLUTION: In a one side welding method by CO2 gas arc welding for one side-welding an object to be welded having a narrow groove, the narrow groove is that the groove of the object to be welded has a ≤55° groove angle and a ≤2 mm root gap (including 0 mm), in the case of welding one side initial layer to form a penetration bead by using a backing material, a filler in the groove having ≥0.3 mm particle size and ≤200 ppm oxygen quantity is sprayed in the groove by 2 mm higher than a groove root. By using a wire for the CO2 gas arc welding, e.g. a solid wire of 1.2-1.6 mm wire diameter or a metal base flux contained wire of ≤2 wt.% oxide contained as a flux component, the welding is conducted so as to be an oxygen content of ≤500 ppm in one side initial layer weld metal.
Inventors:
Fusagi Koshiishi
Tomokazu Morimoto
Hajime Uchiyama
Tomokazu Morimoto
Hajime Uchiyama
Application Number:
JP26683797A
Publication Date:
October 20, 2004
Filing Date:
September 30, 1997
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
B23K9/16; B23K9/035; B23K9/173; B23K35/368; (IPC1-7): B23K9/173; B23K9/035; B23K9/16; B23K35/368
Domestic Patent References:
| JP10202367A | ||||
| JP445270B2 | ||||
| JP6285676A |
Attorney, Agent or Firm:
Yoshiyuki Kaji
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