Title:
HIGH STRENGTH WELDED METAL
Document Type and Number:
WIPO Patent Application WO/2018/043455
Kind Code:
A1
Abstract:
The present invention relates to a high strength welded metal having excellent CTOD characteristics, which is characterized by containing, in mass%, 0.02-0.12% of C, 0.10-0.90% of Si, 1.0-2.0% of Mn, 0-0.12% of Cu, 1.0-3.5% of Ni, at least one selected from among more than 0% but 1.0% or less of Cr and 0.5-1.5% of Mo, 0-0.005% of Ca, 0-0.0050% of Ti, 0.005-0.050% of Al and 0.010-0.050% of O, with the balance being made up of Fe and unavoidable impurities, and which is also characterized in that: the average circle-equivalent diameter of Al-containing oxides in the welded metal is 0.5-1.0 μm; the number density of the Al-containing oxides is 0.005-0.015/μm2; and the contents of C, Si, Mn, Ni, Cr and Mo in mass% satisfy a specific relational expression.
Inventors:
TAMURA EIICHI
KITAGAWA YOSHIHIKO
SASAKURA SHUJI
OKAZAKI YOSHITOMI
NAKO HIDENORI
KITAGAWA YOSHIHIKO
SASAKURA SHUJI
OKAZAKI YOSHITOMI
NAKO HIDENORI
Application Number:
PCT/JP2017/030848
Publication Date:
March 08, 2018
Filing Date:
August 29, 2017
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; C22C38/54; B23K35/30
Foreign References:
| JP2014133258A | 2014-07-24 | |||
| JP2012006073A | 2012-01-12 | |||
| JP2008163456A | 2008-07-17 | |||
| JP2008068274A | 2008-03-27 | |||
| JP2006257481A | 2006-09-28 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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