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Cold Rolled Steel Sheet For Structural Section Having Excellent Hardness And Processability, And Method For Manufacturing Same
Abstract: A cold-rolled steel sheet according to an example of the present invention comprises at most 0.0004 wt% (exclusive of 0 wt%) of C, at most 0.02 wt% (exclusive of 0 wt%) of Si, 0.1 to 0.3 wt% of Mn, at most 0.05 wt% (exclusive of 0 wt%) of Al, at most 0.02 wt% (exclusive of 0 wt%) of P, at most 0.001 wt% (exclusive of 0 wt%)of S, at most 0.004 wt% (exclusive of 0 wt%) of N, 0.015 to 0.035 wt% of Ti, and 0.001 to 0.003 wt% of B, with the balance being Fe and other inevitable impurities, and has a microstructure in which the crystal grain aspect ratio defined by the following equation 1 is 1.4 to 4.0. [Equation 1]: crystal grain aspect ratio = average crystal grain diameter in the rolling direction/average crystal grain diameter in the thickness direction
Notices, Deadlines & Correspondence
Patent Information
Applicants
POSCO
Inventors
1. JO, Minho
2. HONG, Young-Kwang
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202237041114.pdf | 2022-07-19 |
| 2 | 202237041114-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [19-07-2022(online)].pdf | 2022-07-19 |
| 3 | 202237041114-STATEMENT OF UNDERTAKING (FORM 3) [19-07-2022(online)].pdf | 2022-07-19 |
| 4 | 202237041114-REQUEST FOR EXAMINATION (FORM-18) [19-07-2022(online)].pdf | 2022-07-19 |
| 5 | 202237041114-PRIORITY DOCUMENTS [19-07-2022(online)].pdf | 2022-07-19 |
| 6 | 202237041114-FORM 18 [19-07-2022(online)].pdf | 2022-07-19 |
| 7 | 202237041114-FORM 1 [19-07-2022(online)].pdf | 2022-07-19 |
| 8 | 202237041114-DECLARATION OF INVENTORSHIP (FORM 5) [19-07-2022(online)].pdf | 2022-07-19 |
| 9 | 202237041114-COMPLETE SPECIFICATION [19-07-2022(online)].pdf | 2022-07-19 |
| 10 | 202237041114-FORM-26 [07-09-2022(online)].pdf | 2022-09-07 |
| 11 | 202237041114-Proof of Right [16-09-2022(online)].pdf | 2022-09-16 |
| 12 | 202237041114-FORM 3 [19-12-2022(online)].pdf | 2022-12-19 |
| 13 | 202237041114-Information under section 8(2) [09-01-2023(online)].pdf | 2023-01-09 |
| 14 | 202237041114-FER.pdf | 2023-02-03 |
| 15 | 202237041114-FORM 3 [31-07-2023(online)].pdf | 2023-07-31 |
| 16 | 202237041114-OTHERS [03-08-2023(online)].pdf | 2023-08-03 |
| 17 | 202237041114-FER_SER_REPLY [03-08-2023(online)].pdf | 2023-08-03 |
| 18 | 202237041114-CLAIMS [03-08-2023(online)].pdf | 2023-08-03 |
| 19 | 202237041114-US(14)-HearingNotice-(HearingDate-26-07-2024).pdf | 2024-07-03 |
| 20 | 202237041114-Correspondence to notify the Controller [26-07-2024(online)].pdf | 2024-07-26 |
Search Strategy
| 1 | 202237041114E_03-02-2023.pdf |