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Title:
METHOD FOR NARROW-GAP, GAS-SHIELDED ARC WELDING
Document Type and Number:
WIPO Patent Application WO/2014/088110
Kind Code:
A1
Abstract:
In this method that is for gas-shielded arc welding and that joins thick steel members having a plate thickness of at least 22 mm by means of narrow-gap multilayer welding with a bottom groove angle of no greater than 10° and a bottom groove gap of 7-15 mm inclusive, there are at least two root passes, each pass being divided among both sides of the bottom groove gap, and furthermore, by means of controlling the supply angle of welding wire supplied from an electricity supply tip at the tip of a welding torch to the range of 5-15° inclusive with respect to a normal line, the melting depth at the bottom of the thick steel members is at least 1.5 mm.

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Inventors:
KATAOKA TOKIHIKO (JP)
SUMI HIROYUKI (JP)
KITANI YASUSHI (JP)
OI KENJI (JP)
YASUDA KOICHI (JP)
Application Number:
PCT/JP2013/082898
Publication Date:
June 12, 2014
Filing Date:
December 03, 2013
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K9/16; B23K9/173; B23K33/00
Foreign References:
JPS63207475A1988-08-26
JPS60210368A1985-10-22
JP2007118068A2007-05-17
JPS5111033A1976-01-28
JPS59212176A1984-12-01
JPS6149779A1986-03-11
JPH01148469A1989-06-09
JPH10211597A1998-08-11
JP2000218391A2000-08-08
JP2001001148A2001-01-09
JP2002539950A2002-11-26
JPH07116852A1995-05-09
JPS5067758A1975-06-06
Other References:
See also references of EP 2929973A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
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