Title:
METHOD FOR IMPROVING BONDING STRENGTH OF RAIL FLASH-BUTT WELDED JOINT
Document Type and Number:
WIPO Patent Application WO/2024/093184
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for improving the bonding strength of a rail flash-butt welded joint. In the method, a welding process is implemented using a mobile flash-butt welding machine; the welding process comprises pre-flash, flash, accelerated sintering, upset forging, and forging; and after completion of the welding process, a joint is naturally cooled to room temperature in the air, wherein the amount of upset forging during the upset forging stage is 5.0 mm to 18.0 mm, and the forging pressure during the forging stage is 60 t to 80 t. Further disclosed in the present invention is a rail obtained by welding using the method. By means of the method for improving the bonding strength of a rail flash-butt welded joint provided by the present invention, the rail welded by this method has no flat spots, unwelded areas, overburn or other weld defects at rail welds, and has a rough rail fracture, thereby effectively ensuring that the static bending performance of the rail flash-butt welded joint is greatly improved.
More Like This:
Inventors:
LU XIN (CN)
LI DADONG (CN)
WANG RUOYU (CN)
BAI WEI (CN)
LI DADONG (CN)
WANG RUOYU (CN)
BAI WEI (CN)
Application Number:
PCT/CN2023/093540
Publication Date:
May 10, 2024
Filing Date:
May 11, 2023
Export Citation:
Assignee:
PANGANG GROUP PANZHIHUA IRON & STEEL RES INSTITUTE CO LTD (CN)
International Classes:
B23K11/04
Foreign References:
| CN106334863A | 2017-01-18 | |||
| CN106112241A | 2016-11-16 | |||
| CN115488483A | 2022-12-20 | |||
| CN110480139A | 2019-11-22 | |||
| CN114131163A | 2022-03-04 | |||
| JP2012101280A | 2012-05-31 | |||
| US20040188392A1 | 2004-09-30 |
Attorney, Agent or Firm:
LIAN & LIEN IP ATTORNEYS et al. (CN)
Download PDF: