Title:
JIG FOR ASSESSING DELAYED FRACTURE, METHOD FOR ASSESSING DELAYED FRACTURE IN SHEARED END SURFACE, AND TEST PIECE
Document Type and Number:
WIPO Patent Application WO/2023/085023
Kind Code:
A1
Abstract:
Provided are: a jig and a test piece that enable assessment of a delayed fracture in a sheared end surface more accurately and easily; and a method for assessing a delayed fracture using same. A jig (1) for assessing a delayed fracture is for applying a tensile load on a test piece (10) having pin holes (10A, 10B) bored on both sides thereof in the longitudinal direction, and is installed in a hydrogen incoming environment together with the test piece (10) that is bound in the load applied state. This jig comprises: a first pin (2) to be inserted in one of the pin holes (10A); a second pin (3) to be inserted in the other pin hole (10B); a frame component (5) provided with first insertion holes (5Aa, 5Bb) to be inserted with the opposing ends of the first pin (2); a slide component (6) provided with second insertion holes (6Aa, 6Bb) to be inserted with the opposing ends of the second pin (3); and a tension adjustment mechanism for coupling the slide component (6) to the frame component (5) so as to be able to move back and forth in the longitudinal direction of the test piece (10). The tension adjustment mechanism is a feed screw mechanism which linearly moves in association with rotation of a screw (7).
Inventors:
MATSUKI YUICHI (JP)
SHINMIYA TOYOHISA (JP)
NAKAGAWA KINYA (JP)
YAMASAKI YUJI (JP)
SHINMIYA TOYOHISA (JP)
NAKAGAWA KINYA (JP)
YAMASAKI YUJI (JP)
Application Number:
PCT/JP2022/038968
Publication Date:
May 19, 2023
Filing Date:
October 19, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
G01N3/04; G01N19/02; G01N3/08
Foreign References:
| JP2016003951A | 2016-01-12 | |||
| JPS5525270U | 1980-02-19 | |||
| JPS58205836A | 1983-11-30 | |||
| JP2009069004A | 2009-04-02 | |||
| JPH0273133A | 1990-03-13 | |||
| JP2013124999A | 2013-06-24 | |||
| CN103674817A | 2014-03-26 | |||
| JPH0312155U | 1991-02-07 | |||
| JPS54127579U | 1979-09-05 | |||
| JPH0445953U | 1992-04-20 |
Other References:
MATSUKI YUICHI, JUNSUKE TOBITA, KINYA NAKAGAWA, TOYOHISA SHINGU, YUJI YAMAZAKI, YOSHIKIYO TAMAI: "Effect of Microstructural Transformation upon Edge Heat Treatment on Stretch Flangeability of Ultrahigh-Strength Steel with Sheared Edge", JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, vol. 63, no. 736, 1 May 2022 (2022-05-01), pages 65 - 71, XP093065691
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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