Title:
TIG WELDING JOINT
Document Type and Number:
WIPO Patent Application WO/2022/186097
Kind Code:
A1
Abstract:
Provided is a TIG welding joint for a high Mn-containing steel material, in which the generation of high temperature cracks during welding is suppressed and which has high strength and excellent impact toughness at extremely low temperatures. The TIG welding joint is such that: the high Mn-containing steel material has a chemical composition containing, by mass%, 0.10-0.80% C, 0.05-1.00% Si, 18.0-30.0% Mn, 0.030% or less P, 0.0070% or less S, 0.010-0.070% Al, 2.5-7.0% Cr, 0.0050-0.0500% N, and 0.0050% or less O, with the remainder comprising Fe and inevitable impurities; and a weld metal has a chemical composition containing 0.10-0.80% C, 0.05-1.00% Si, 15.0-30.0% Mn, 0.030% or less P, 0.030% or less S, 0.100% or less Al, 6.0-14.0% Cr, and 0.100% or less N, with the remainder comprising Fe and inevitable impurities.
Inventors:
WATANABE KAZUFUMI (JP)
TAKADA ATSUSHI (JP)
ANDO AKIYOSHI (JP)
OKABE TAKATOSHI (JP)
UEDA KEIJI (JP)
TAKADA ATSUSHI (JP)
ANDO AKIYOSHI (JP)
OKABE TAKATOSHI (JP)
UEDA KEIJI (JP)
Application Number:
PCT/JP2022/008118
Publication Date:
September 09, 2022
Filing Date:
February 28, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K35/30; B23K9/167; C21D8/06; C22C38/00; C22C38/38; C22C38/58
Domestic Patent References:
| WO2020203335A1 | 2020-10-08 | |||
| WO2020039643A1 | 2020-02-27 | |||
| WO2020166538A1 | 2020-08-20 | |||
| WO2020203334A1 | 2020-10-08 |
Foreign References:
| JP2019520473A | 2019-07-18 | |||
| KR20160078621A | 2016-07-05 | |||
| JP2016196703A | 2016-11-24 | |||
| JP2017071817A | 2017-04-13 | |||
| JP2017502842A | 2017-01-26 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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