Title:
WEATHER-RESISTANT BRIDGE STEEL AND SMELTING PROCESS
Document Type and Number:
WIPO Patent Application WO/2020/093688
Kind Code:
A1
Abstract:
The present invention relates to the technical field of iron and steel smelting, and disclosed therein is weather-resistant bridge steel. The chemical composition and mass percentage are as follows: C: 0.36%-0.39%, Si: 0.10%-0.25%, Mn: 0.65%-0.75%, S≤0.005%, P≤0.010%, Cr: 0.95%-1.05%, Ni: 1.00%-1.10%, Cu: 0.30%-0.40%, Mo: 0.27%-0.35%, V: 0.20%-0.30%, and A1: 0.015 %-0.035%. By means of the improvement and innovation of the composition, rolling and heat treatment process, the present invention accurately controls the organization, thereby achieving higher performance requirements, and having the characteristics of toughness, ductility, molding, welding and cutting, abrasion, high temperature, fatigue resistance and so on of high quality steel.
Inventors:
LI LEI (CN)
LI YUNHUI (CN)
LI LIN (CN)
WU JIANYONG (CN)
LI YUNHUI (CN)
LI LIN (CN)
WU JIANYONG (CN)
Application Number:
PCT/CN2019/089350
Publication Date:
May 14, 2020
Filing Date:
May 30, 2019
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C21C5/52; C21C7/00; C22C33/06; C22C38/02; C22C38/42
Foreign References:
| CN109252012A | 2019-01-22 | |||
| CN108754303A | 2018-11-06 | |||
| CN103422033A | 2013-12-04 | |||
| JPH06306543A | 1994-11-01 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL CENERAL PARTNERSHIP) (CN)
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