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Title:
TANDEM ARC WELDING METHOD
Document Type and Number:
Japanese Patent JP2010125496
Kind Code:
A
Abstract:

To provide a tandem arc welding method using two welding wires as electrodes and capable of obtaining the sufficient depth of penetration, forming a smooth weld metal, and suppressing production of slag.

In the consumable electrode type tandem arc welding method using two welding wires as the electrodes, an active gas composed of an inert gas and CO2gas of ≥40 vol.% or gaseous carbon dioxide is used for shield gas for a preceding electrode, and an inert gas containing ≥99.5 vol.% of one or two or more kinds selected from among Ar gas, He gas and H2gas is used for a shield gas of a succeeding electrode. Slag is cleaned with the succeeding electrode before a molten metal formed by the preceding electrode is solidified.

COPYRIGHT: (C)2010,JPO&INPIT


Inventors:
KATAOKA TOKIHIKO
IKEDA TOMOMASA
ONO MORIAKI
Application Number:
JP2008303823A
Publication Date:
June 10, 2010
Filing Date:
November 28, 2008
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
B23K9/173; B23K9/00; B23K9/16; B23K35/30
Domestic Patent References:
JP2000052033A2000-02-22
JPS62179872A1987-08-07
JPS5471744A1979-06-08
JPS6160269A1986-03-27
JP2006247695A2006-09-21
JP2001191197A2001-07-17
JP2002137086A2002-05-14
JP2008161899A2008-07-17
JPH09206945A1997-08-12
JP2000052033A2000-02-22
JPS62179872A1987-08-07
JPS5471744A1979-06-08
Attorney, Agent or Firm:
Eiichi Kobayashi



 
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