Title:
RESIDUAL STRESS MEASURING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/146340
Kind Code:
A1
Abstract:
The present invention provides a method for measuring residual stress in a cast or forged steel product using X-rays, wherein the method is provided with a step of irradiating the cast or forged steel product with X-rays, a step of detecting the intensity of diffracted X-rays originating from the X-rays, in two dimensions, and a step of calculating the residual stress on the basis of a diffraction ring formed by the intensity distribution of the diffracted X-rays detected in the detecting step, and wherein, when measuring the residual stress for each of a plurality of measuring positions in the cast or forged steel product, in the calculating step the residual stress at each measuring position is calculated on the basis of the diffraction ring at each measuring position and a different X-ray elastic constant at each measuring position.
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Inventors:
MATSUDA MARIKO
KABUTOMORI TATSUHIKO
TAKAMATSU HIROYUKI
KABUTOMORI TATSUHIKO
TAKAMATSU HIROYUKI
Application Number:
PCT/JP2018/047320
Publication Date:
August 01, 2019
Filing Date:
December 21, 2018
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
G01N23/2055; G01L1/25
Foreign References:
| JP2005241308A | 2005-09-08 | |||
| JPH08201193A | 1996-08-09 | |||
| US5148458A | 1992-09-15 | |||
| JP2005241308A | 2005-09-08 |
Other References:
Y.KANEMATSU, M.MATSUI: "Fundamental Study of Rail Axial Force Evaluation by Portable X-ray Diffraction Device", RTRI REPORT, vol. 30, no. 6, June 2016 (2016-06-01), pages 17 - 22, XP009521995, ISSN: 1880-1765
SAKAIDA, YOSHIHISA ET AL.: "Influence of Carbon Content on Mechanical and X-Ray Elastic Constants of Carburized Case Layer in Chrome Molybdenum Steel", JOURNAL OF THE SOCIETY OF MATERIALS SCIENCE, vol. 62, no. 5, May 2013 (2013-05-01), pages 335 - 341, XP055627130
See also references of EP 3748345A4
SAKAIDA, YOSHIHISA ET AL.: "Influence of Carbon Content on Mechanical and X-Ray Elastic Constants of Carburized Case Layer in Chrome Molybdenum Steel", JOURNAL OF THE SOCIETY OF MATERIALS SCIENCE, vol. 62, no. 5, May 2013 (2013-05-01), pages 335 - 341, XP055627130
See also references of EP 3748345A4
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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