Title:
LOW-CARBON AND ENERGY-SAVING PRODUCTION METHOD FOR 2,060-MPA-GRADE-OR-HIGHER WIRE ROD FOR BRIDGE CABLE
Document Type and Number:
WIPO Patent Application WO/2023/165008
Kind Code:
A1
Abstract:
A low-carbon and energy-saving production method for a 2,060-MPa-grade-or-higher wire rod for a bridge cable. By means of the component design of 'high chromium/medium silicon/no precious metal alloy' combined with the technological processes of 'KR pretreatment→BOF converter→LF refining→RH vacuum degassing→continuous casting of a small square billet→billet finishing→billet heating→controlled rolling→new-type DP controlled cooling (air cooling and fog cooling), bloom cogging and heat treatments such as a water bath, a salt bath and a lead bath are not required. A microscopic structure with a high sorbitizing rate, a small cementite interlamellar spacing and a low network carbide level can still be obtained; and the finally prepared steel wire has a tensile strength of ≥2,060 MPa and a torsion index of ≥30 times, can be wound 8 or more times, and meets the construction requirements of national large-span and ultrahigh-strength cable ropes for bridge engineering. The process successfully replaces rolling via heating twice and off-line heat treatments, and has the advantages of low energy consumption cost, reduced carbon emissions, environmental friendliness, high production efficiency, etc.
Inventors:
ZUO JINZHONG (CN)
WANG LIYIN (CN)
WANG ZHI (CN)
LIN JUN (CN)
LAI YONGBIAO (CN)
YANG KEDA (CN)
LIAO JIAMING (CN)
ZHAO YANG (CN)
SUN JUNJUN (CN)
WANG LIYIN (CN)
WANG ZHI (CN)
LIN JUN (CN)
LAI YONGBIAO (CN)
YANG KEDA (CN)
LIAO JIAMING (CN)
ZHAO YANG (CN)
SUN JUNJUN (CN)
Application Number:
PCT/CN2022/089777
Publication Date:
September 07, 2023
Filing Date:
April 28, 2022
Export Citation:
Assignee:
ZENITH STEEL GROUP CO LTD (CN)
CHANGZHOU ZENITH SPECIAL STEEL CO LTD (CN)
CHANGZHOU ZENITH SPECIAL STEEL CO LTD (CN)
International Classes:
C21D8/06; C22C38/02; C22C38/04; C22C38/06
Domestic Patent References:
| WO2012118093A1 | 2012-09-07 |
Foreign References:
| CN1405350A | 2003-03-26 | |||
| CN112359277A | 2021-02-12 | |||
| CN204817495U | 2015-12-02 | |||
| CN110066963A | 2019-07-30 | |||
| CN110144519A | 2019-08-20 | |||
| CN112501498A | 2021-03-16 | |||
| JPH08296008A | 1996-11-12 |
Attorney, Agent or Firm:
CHANGZHOU INNOVATION PATENT AGENCY (CN)
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