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Title:
METHOD FOR PRODUCING WELDING JOINT
Document Type and Number:
Japanese Patent JP2008055462
Kind Code:
A
Abstract:

To provide a method for producing a highly reliable welding joint, regarding the production of a weld zone in a structure, in which welding defects such as a penetration fault are suppressed, and further, the weld zone has excellent material properties such as stress corrosion crack resistance.

In the method for producing a welding joint by welding metal members, the material component of a welding wire used upon the welding of the metal members is controlled so that the content of sulfur (S) is 0.004 to 0.010%, and also, the content of ferrite based upon a dilong chart is 10 to 15%. According to this invention, regarding welding joint production in a welded structure including piping or the like, the method for producing a highly reliable welding joint using a TIG welding wire for an initial layer in which welding defects such as a penetration fault are suppressed, and further having excellent stress corrosion crack resistance can be provided.


Inventors:
OBATA KYOJI
ANZAI HIDEYA
KOIDE HIROO
RA SHOGUN
KATO MITSUO
Application Number:
JP2006234854A
Publication Date:
March 13, 2008
Filing Date:
August 31, 2006
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
B23K35/30; B23K9/167
Domestic Patent References:
JPH09174280A1997-07-08
JP2001321985A2001-11-20
JPH01178375A1989-07-14
JPS61162274A1986-07-22
JPS62183994A1987-08-12
JPS62134196A1987-06-17
Attorney, Agent or Firm:
Manabu Inoue