Title:
耐水素誘起割れ性に優れた鋼板およびその製造方法
Document Type and Number:
Japanese Patent JP5824401
Kind Code:
B2
Abstract:
A steel plate is provided which has excellent hydrogen induced cracking resistance. The steel plate is suitable for use in a line pipe. The steel plate satisfies a predetermined composition. In a composition of an inclusion contained in the steel and having a width of 1 µm or more, the ratio (RES/CaS) of the mass of an REM sulfide (RES) to that of a Ca sulfide (CaS) is equal to or more than 0.05, a Zr content of the inclusion is in a range of 5 to 60 %, and a Nb content of the inclusion is 5 % or less.
Inventors:
Taku Kato
Hiroki Imamura
Shinsuke Sato
Hiroki Imamura
Shinsuke Sato
Application Number:
JP2012083077A
Publication Date:
November 25, 2015
Filing Date:
March 30, 2012
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C22C38/00; C21C7/00; C21C7/04; C21C7/06; C21C7/064; C22C38/14; C22C38/58
Domestic Patent References:
| JP1294845A | ||||
| JP8067946A | ||||
| JP58006961A | ||||
| JP2010248611A | ||||
| JP2011219797A |
Attorney, Agent or Firm:
Kyuichi Ueki
Hisahiko Ueki
Tadashi Sugakawa
Hiroaki Ito
Hisahiko Ueki
Tadashi Sugakawa
Hiroaki Ito