Title:
LOW-YIELD-RATIO WEATHER-RESISTANT BRIDGE STEEL AND MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/016419
Kind Code:
A1
Abstract:
A low-yield-ratio weather-resistant bridge steel and a manufacturing method, relating to the technical field of steel production. The chemical components of the bridge steel are as follows, in percentage by mass: 0.06%-0.09% of C, 0.15%-0.30% of Si, 1.51%-1.65% of Mn, 0.009%-0.015% of P, ≤0.002% of S, 0.020%-0.050% of Nb, 0.010%-0.020% of Ti, 0.010%-0.030% of V, 0.30%-0.40% of Cu, 0.30%-0.45% of Ni, 0.45%-0.60% of Cr, 0.16%-0.25% of Mo, 0.02%-0.04% of Alt, and the balance being Fe and inevitable impurities. By means of scientific design on components and the matched manufacturing method of controlled rolling, controlled cooling and tempering, the weather-resistant bridge steel has the characteristics of low yield ratio, high low-temperature toughness and high ductility.
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Inventors:
WANG JUN (CN)
QIAO MINGLIANG (CN)
CUI QIANG (CN)
CHEN LINHENG (CN)
TANG CHUNXIA (CN)
MENG LINGMING (CN)
QIN YURONG (CN)
LIU TAO (CN)
LI XINLIANG (CN)
QIAO MINGLIANG (CN)
CUI QIANG (CN)
CHEN LINHENG (CN)
TANG CHUNXIA (CN)
MENG LINGMING (CN)
QIN YURONG (CN)
LIU TAO (CN)
LI XINLIANG (CN)
Application Number:
PCT/CN2022/114327
Publication Date:
January 25, 2024
Filing Date:
August 23, 2022
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; B21B1/46; B21B37/74; C21D8/02; C22C33/04; C22C38/06; C22C38/42; C22C38/44; C22C38/46; C22C38/48; C22C38/50; C22C38/58
Foreign References:
| CN111996460A | 2020-11-27 | |||
| CN111455287A | 2020-07-28 | |||
| CN108531808A | 2018-09-14 | |||
| CN102851615A | 2013-01-02 | |||
| CN111020376A | 2020-04-17 | |||
| CN112831717A | 2021-05-25 | |||
| CN114645201A | 2022-06-21 | |||
| CN103614630A | 2014-03-05 | |||
| JP2009235548A | 2009-10-15 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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