Title:
1300-MPA-GRADE-OR-HIGHER COLD-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/246737
Kind Code:
A1
Abstract:
Disclosed in the present invention are a 1300-MPa-grade-or-higher cold-rolled steel sheet and a manufacturing method therefor. The cold-rolled steel sheet comprises Fe and inevitable impurity elements, and further comprises the following chemical elements in percentages by mass: 0.10-0.30% of C, 0.1-0.5% of Si, 0.8-2.5% of Mn, 0.01-0.03% of Al, 0.001-0.003% of B, and 0-0.05% of Ti, wherein the mass percentage contents of C and Mn satisfy: C+Mn/6≥0.35%. By means of a reasonable chemical component design and a reasonable manufacturing process, the 1300-MPa-grade-or-higher cold-rolled steel sheet has an ultrahigh strength, and also has good resistance to delayed cracking and good bending performance.
Inventors:
XUE PENG (CN)
ZHU XIAODONG (CN)
LI WEI (CN)
ZHU XIAODONG (CN)
LI WEI (CN)
Application Number:
PCT/CN2023/101256
Publication Date:
December 28, 2023
Filing Date:
June 20, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/02; C21D1/26; C21D6/00; C21D8/02; C22C38/04; C22C38/06; C22C38/12; C22C38/14
Foreign References:
| CN111647732A | 2020-09-11 | |||
| CN113737087A | 2021-12-03 | |||
| CN113122783A | 2021-07-16 | |||
| CN109207847A | 2019-01-15 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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