Title:
STEEL FOR THIN-GAUGE BRIDGES AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/155372
Kind Code:
A1
Abstract:
The present invention relates to the technical field of steel production. Disclosed is a steel for thin-gauge bridges and a production method therefor. The chemical composition and mass percentage of said steel are as follows: C≤0.20%, Si≤0.55%, Mn≤2.00%, P≤0.020%, S≤0.010%, Nb≤0.060%, V≤0.080%, Ti: 0.006%-0.020%, Cr≤0.80%, Ni≤1.10%, Mo≤0.60%, Cu≤0.55%, Al: 0.015%-0.060%, Mg: 0.0008%-0.0020%, B≤0.0040%, N≤0.0120%; Ca is not added, and the balance is Fe and unavoidable impurities. By means of an advanced magnesium metallurgy technology, the welding performance of products is effectively improved. An advanced composite rolling technology is employed to effectively improve the surface quality of thin-gauge products; at the same time, the machine-hour output of the product is greatly improved.
Inventors:
ZHAI DONGYU (CN)
Application Number:
PCT/CN2022/105611
Publication Date:
August 24, 2023
Filing Date:
July 14, 2022
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; B21B1/38; B23P15/00; C22C33/06; C22C38/04; C22C38/06; C22C38/42; C22C38/44; C22C38/46; C22C38/48; C22C38/50; C22C38/54
Foreign References:
| CN114525453A | 2022-05-24 | |||
| CN113234999A | 2021-08-10 | |||
| CN113046652A | 2021-06-29 | |||
| CN105921514A | 2016-09-07 | |||
| CN113046627A | 2021-06-29 | |||
| CN113025879A | 2021-06-25 | |||
| CN113025880A | 2021-06-25 | |||
| JP2007277680A | 2007-10-25 | |||
| US20210348250A1 | 2021-11-11 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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