Title:
MEDIUM-STRENGTH STEEL RAIL HAVING HIGH YIELD STRENGTH AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/027264
Kind Code:
A1
Abstract:
The present invention belongs to the field of steel rail production, and particularly relates to a medium-strength steel rail having high yield strength and a production method therefor. The medium-strength steel rail having high yield strength in the present invention has a yield strength larger than or equal to 820 MPa, a tensile strength in the range of 1200-1300 MPa, and an elongation larger than or equal to 10%. Without the addition of various alloy elements, the medium-strength steel rail to which the present invention relates achieves high yield strength by means of online heat treatment process design, such that the probability of contact fatigue damages caused in use of passenger and freight mixed transportation lines can be effectively reduced, which effectively improves the service performance and prolongs the service life of steel rails, thus enhancing operation safety of trains; and meanwhile, the production method for the medium-strength steel rail having high yield strength provided in the present application is simple and easy to operate, facilitating large-scale popularization and application thereof in the passenger and freight mixed transportation lines.
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Inventors:
LI RUOXI (CN)
DENG YONG (CN)
YANG DAWEI (CN)
YUAN JUN (CN)
DENG YONG (CN)
YANG DAWEI (CN)
YUAN JUN (CN)
Application Number:
PCT/CN2023/093537
Publication Date:
February 08, 2024
Filing Date:
May 11, 2023
Export Citation:
Assignee:
PANGANG GROUP PANZHIHUA IRON & STEEL RES INSTITUTE CO LTD (CN)
International Classes:
C21D9/04; C22C38/02
Domestic Patent References:
| WO2022110812A1 | 2022-06-02 |
Foreign References:
| CN115233503A | 2022-10-25 | |||
| CN112301205A | 2021-02-02 | |||
| CN104480390A | 2015-04-01 |
Other References:
ZUWEN LU: "Speed up the Study on the Development of the High-strength Extra-fine Rails and Adapt Them-selves to the Demand of the Increased Speed and Heavy-haul Transportation", CHINESE RAILWAYS, vol. 5, 15 May 1997 (1997-05-15), pages 15 - 20, XP093135164
Attorney, Agent or Firm:
LIAN & LIEN IP ATTORNEYS (CN)
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