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Title:
SUBMERGED ARC WELDED JOINT
Document Type and Number:
WIPO Patent Application WO/2022/186096
Kind Code:
A1
Abstract:
Provided is a submerged arc welded joint for an Mn-rich steel material, which rarely undergoes the occurrence of high-temperature cracking during welding and has high strength and excellent cryogenic impact toughness.　The welded joint is configured such that: the Mn-rich steel material has a chemical composition containing, in % by mass, 0.10 to 0.80% of C, 0.05 to 1.00% of Si, 18.0 to 30.0% of Mn, 0.030% or less of P, 0.0070% or less of S, 0.010 to 0.070% of Al, 2.5 to 7.0% of Cr, 0.0050 to 0.0500% of N, 0.0050% or less of O, and a remainder comprising Fe and unavoidable impurities; and a welding metal has a chemical composition containing, in % by mass, 0.10 to 0.80% of C, 0.05 to 1.00% of Si, 15.0 to 30.0% of Mn, 0.030% or less of P, 0.030% or less of S, 0.100% or less of Al, 6.0 to 14.0% of Cr, 0.100% or less of N, and a remainder comprising Fe and unavoidable impurities.

Inventors:
WATANABE KAZUFUMI (JP)
TAKADA ATSUSHI (JP)
ANDO AKIYOSHI (JP)
OKABE TAKATOSHI (JP)
UEDA KEIJI (JP)
Application Number:
PCT/JP2022/008117
Publication Date:
September 09, 2022
Filing Date:
February 28, 2022
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; B23K9/18; B23K35/30; C22C38/38
Domestic Patent References:
WO2020203335A12020-10-08
WO2020039643A12020-02-27
WO2020166538A12020-08-20
WO2022030200A12022-02-10
Foreign References:
JP2019520473A2019-07-18
JPS5896853A1983-06-09
JPS5118913A1976-02-14
JP2017502842A2017-01-26
JP2016196703A2016-11-24
JP2017071817A2017-04-13
JP2017502842W
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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