Title:
WELDED STRUCTURE HAVING EXCELLENT BRITTLE CRACK ARREST CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO/2017/217516
Kind Code:
A1
Abstract:
This welded structure is provided with a doubler member (10) disposed at the abutment of a web (1) and a flange (2). The web end surface is abutted against the doubler member surface, the web and the doubler member are joined by fillet welding; the flange surface and doubler member surface are placed overlapping each other and the doubler member is joined with fillet welding. At that time, the relation between the width, in the joint cross section, of the unwelded portion of the overlapping surface of the fillet welded joint, the ratio Y(%) of the doubler member plate width and the sum of the leg lengths of the left and right fillet welded portions, and the brittle crack arrest toughness (Kca)T(N/mm3/2) of the doubler member at the service temperature (°C) is adjusted to satisfy Y(%) ≧ {6900-Kca}/85. Thusly, it is possible to prevent and stop propagation of brittle cracks occurring from the flange by means of the doubler member.
Inventors:
HANDA TSUNEHISA (JP)
IGI SATOSHI (JP)
OI KENJI (JP)
TOYODA MASANOBU (JP)
KIJI NOBORU (JP)
IGI SATOSHI (JP)
OI KENJI (JP)
TOYODA MASANOBU (JP)
KIJI NOBORU (JP)
Application Number:
PCT/JP2017/022213
Publication Date:
December 21, 2017
Filing Date:
June 15, 2017
Export Citation:
Assignee:
JFE STEEL CORP (JP)
JAPAN MARINE UNITED CORP (JP)
JAPAN MARINE UNITED CORP (JP)
International Classes:
B23K31/00; B23K9/00; B23K9/02; B63B9/06
Domestic Patent References:
| WO2013038685A1 | 2013-03-21 |
Foreign References:
| JP2008023594A | 2008-02-07 | |||
| JPS57116392U | 1982-07-19 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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