Title:
TRIP STEEL AND PREPARATION METHOD THEREFOR, COLD-ROLLED STEEL SHEET, AND HOT-DIP GALVANIZED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/274281
Kind Code:
A1
Abstract:
Disclosed in the present invention are TRIP steel and a preparation method therefor, a cold-rolled steel sheet, and a hot-dip galvanized steel sheet, wherein the TRIP steel comprises the following chemical components, in percentages by mass: C: 0.15-0.3%, Si: 0.6-1.0%, Mn: 1.7-2.5%, Al: 0.5-0.9%, P ≤ 0.01%, S ≤ 0.01%, N ≤ 0.007%, and Fe ≥ 90%. The TRIP steel of the present invention is based on carbon-silicon-manganese steel. By means of optimizing the proportions of carbon, silicon, manganese and aluminum, and replacing Si in traditional TRIP steel with a part of the Al, the effects of inhibiting carbide precipitation and stabilizing residual austenite can be achieved so as to ensure the mechanical properties of the TRIP steel, and the surface quality and plateability of the steel sheet can also be improved.
Inventors:
CHEN MENGXIAO (CN)
ZHONG YONG (CN)
WANG LI (CN)
XIE SHUANG (CN)
ZHONG YONG (CN)
WANG LI (CN)
XIE SHUANG (CN)
Application Number:
PCT/CN2022/102199
Publication Date:
January 05, 2023
Filing Date:
June 29, 2022
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/02; C21D1/26; C21D8/02; C21D11/00; C22C33/04; C22C38/04; C22C38/06; C23C2/06; C23C2/40; C23F17/00
Foreign References:
| CN111893378A | 2020-11-06 | |||
| CN103649343A | 2014-03-19 | |||
| CN102747276A | 2012-10-24 | |||
| CN101191174A | 2008-06-04 | |||
| JP2011241474A | 2011-12-01 | |||
| CN201610867413A | 2016-09-29 | |||
| CN201310520998A | 2013-10-29 | |||
| CN200810119818A | 2008-09-11 | |||
| CN201510596778A | 2015-09-18 | |||
| CN201510112679A | 2015-03-13 | |||
| CN201110280804A | 2011-09-21 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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