Title:
HIGH-STRENGTH WELDED JOINT HAVING IMPROVED HIGH-HEAT-INPUT TOUGHNESS
Document Type and Number:
WIPO Patent Application WO/2023/121236
Kind Code:
A1
Abstract:
In the present specification, disclosed is a high-strength welded joint having improved high-heat-input toughness by controlling a microstructure. The high-strength welded joint having improved high-heat-input toughness, according to an embodiment of the present invention, may comprise, in weight%, C: 0.03-0.045%, Mn: 1.45-1.55%, Si: 0.3-0.4%, Al: 0.02-0.03%, Ni: 1.55-1.70%, Cr: 0.05-0.07%, Cu: 0.05-0.08%, Mo: 0.14-0.2%, Ti: 0.06-0.07%, Nb: 0.004-0.005%, O: 0.035-0.05%, N: 40-180 ppm, P: greater than 0 ppm and 80 ppm or less, S: greater than 0 ppm and 90 ppm or less, and the balance being iron (Fe) and other inevitable impurities.
Inventors:
HAN KYUTAE (KR)
HWANG WONTAEK (KR)
JEONG BOYOUNG (KR)
HWANG WONTAEK (KR)
JEONG BOYOUNG (KR)
Application Number:
PCT/KR2022/020863
Publication Date:
June 29, 2023
Filing Date:
December 20, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
B23K35/30; B23K9/16
Foreign References:
| KR20090062598A | 2009-06-17 | |||
| KR20180074415A | 2018-07-03 | |||
| JP2016172892A | 2016-09-29 | |||
| JP2013147740A | 2013-08-01 | |||
| JP2010094686A | 2010-04-30 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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