Title:
HIGHLY FORMABLE AND EASILY PHOSPHATED HIGH-MANGANESE COLD-ROLLED STEEL PLATE HAVING TENSILE STRENGTH OF 1000-1600 MPA, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/241546
Kind Code:
A1
Abstract:
A highly formable and easily phosphated high-manganese cold-rolled steel plate having the tensile strength of 1000-1600 MPa, and a manufacturing method therefor. The steel plate is of a matrix face-centered cubic and surface body-centered cubic composite structure; a matrix comprises high-density twin crystals (1-10)*105m-1 and a low-density dislocation (1-10)*1013m-1. The matrix comprises components in percentage by weight of: C: 0.5-0.8%; Mn: 12-20%; Si: 0.1-0.5%; Al: 1.2-1.8%; N: 0.01-0.1%; RE: 0.01-0.1%; and the balance being Fe and inevitable impurities, wherein Mn + 25C - 1.5Al ≥ 28%, and Si + 20Re ≥ 1.0%. According to the present invention, by means of selection of a cold rolling-continuous annealing process, a steel plate may achieve the tensile strength of 1000-1600 MPa and the elongation of 20-55%, and has excellent phosphating performance and a cold forming radius of 0t. The steel plate is steel for integrated material design for an automobile high-strength safety structural component.
Inventors:
ZHONG YONG (CN)
JIN XINYAN (CN)
JIN XINYAN (CN)
Application Number:
PCT/CN2023/099843
Publication Date:
December 21, 2023
Filing Date:
June 13, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/04; C21D8/02; C22C38/02; C22C38/06
Domestic Patent References:
| WO2012077150A2 | 2012-06-14 |
Foreign References:
| CN106319355A | 2017-01-11 | |||
| CN106319356A | 2017-01-11 | |||
| CN101432456A | 2009-05-13 | |||
| CN114457290A | 2022-05-10 | |||
| GB201218557D0 | 2012-11-28 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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