Title:
耐脆性き裂伝播性に優れた溶接構造体
Document Type and Number:
Japanese Patent JP4772922
Kind Code:
B2
Abstract:
A welded structure wherein steel plates having at least partial regions with a brittle crack arrest property Kca of 4000N/mm 1.5 or more are butt welded together so as to form a steel plate welded joint, wherein at least one location of the steel plate welded joint is provided with a crack control part which diverts a brittle crack which has occurred at the steel plate welded joint to a steel plate base metal side, outer edges of an insert member which forms the crack control part are formed to extend in the longitudinal direction of the steel plate welded joint from a weld metal zone of the steel plate welded joint while slanted by 15° to 50° with respect to the longitudinal direction of the steel plate welded joint, and a horizontal width direction end of the insert member is made to face a region of the steel plate where the Kca is 4000N/mm 1.5 or more, whereby even if a brittle crack occurs in the welded joint, the brittle crack can be kept from propagating through the weld joint and base metal.
Inventors:
Chu Ishikawa
Takehiro Inoue
Yuji Hashiba
Jun Otani
Takehiro Inoue
Yuji Hashiba
Jun Otani
Application Number:
JP2010524283A
Publication Date:
September 14, 2011
Filing Date:
January 14, 2010
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B23K31/00; B23K9/23; B23K9/00; C22C38/00; C22C38/58
Domestic Patent References:
| JP2005131708A | 2005-05-26 | |||
| JPS5162155A | 1976-05-29 | |||
| JP2007302993A | 2007-11-22 | |||
| JP2008248382A | 2008-10-16 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nakamura Asayuki
Nagasaka Tomoyasu
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nakamura Asayuki
Nagasaka Tomoyasu