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Title:
UPRIGHT NARROW GROOVE GAS SHIELDED ARC WELDING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/037754
Kind Code:
A1
Abstract:
An upright narrow groove gas shielded arc welding method for performing single-layer welding or multilayer welding employing weaving to join two thick steel materials having, as a prescribed groove condition, a plate thickness at least equal to 10 mm, wherein a welding wire containing a prescribed amount of REM is used, and weaving for initial-layer welding is performed using a welding torch provided with a bent portion and a tip end portion demarcated by the bent portion, and at this time, when performing weaving with respect to a groove surface of the thick steel materials, the tip end portion of the welding torch is caused to oscillate toward the groove surface of the thick steel material under prescribed conditions.

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Inventors:
KOZUKI SHOHEI (JP)
HAYAKAWA NAOYA (JP)
OI KENJI (JP)
Application Number:
PCT/JP2017/025615
Publication Date:
March 01, 2018
Filing Date:
July 13, 2017
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K9/173; B23K9/02; B23K9/022; B23K9/12; B23K35/30; C22C38/00; C22C38/06
Domestic Patent References:
WO2017043086A12017-03-16
Foreign References:
JP2008290116A2008-12-04
JP2001219292A2001-08-14
JPS6462297A1989-03-08
JP5884209B12016-03-15
JP2015112638A2015-06-22
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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