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High Strength Hot Dip Galvanized Steel Sheet And High Strength Alloyed Hot Dip Galvanized Steel Sheet Excellent In Mechanical Cutting Property, And Manufacturing Method Thereof
Abstract: Provided is a high strength hot dip galvanized steel sheet and the like said steel sheet providing high ductility while ensuring high strength with a maximum tensile strength of at least 900 MPa and having excellent mechanical cutting characteristics. The high strength hot dip galvanized steel sheet has a thickness of 0.6 to 5.0 mm and has a plating layer on a surface of the steel sheet for which component compositions have been set within appropriate ranges. The structure of the steel sheet includes a ferrite phase with a volume fraction of 40 to 90% and a retained austenite phase with a volume fraction of at least 3%. The retained austenite phase has a solute carbon content of 0.70 to 1.00% an average particle size of 2.0 µm or less and an average distance between particles of 0.1 to 5.0 µm. The thickness of a decarburized layer in a surface section of the steel sheet is 0.01 to 10.0 µm and the average particle size and average density of oxides contained in the surface section of the steel sheet are 30 to 120 nm and 1.0 × 10 oxides/m or higher respectively. In addition the work hardening coefficient (n value) when plastic deformation of 3 to 7% occurs is on average at least 0.080.
Notices, Deadlines & Correspondence
Patent Information
Applicants
NIPPON STEEL & SUMITOMO METAL CORPORATION
Inventors
1. KAWATA Hiroyuki
2. MARUYAMA Naoki
3. MURASATO Akinobu
4. MINAMI Akinobu
5. YASUI Takeshi
6. KUWAYAMA Takuya
7. BAN Hiroyuki
8. HIRAMATSU Kaoru
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | PCT-304.pdf | 2014-04-02 |
| 2 | PCT COVER PAGE.pdf | 2014-04-02 |
| 3 | GPA.pdf | 2014-04-02 |
| 4 | Form 5.pdf | 2014-04-02 |
| 5 | FORM 3.pdf | 2014-04-02 |
| 6 | Complete specification.pdf | 2014-04-02 |
| 7 | 2546-DELNP-2014.pdf | 2014-04-02 |
| 8 | 2546-delnp-2014-Correspondence-Others-(15-04-2014).pdf | 2014-04-15 |
| 9 | 2546-delnp-2014-Correspondence Others-(10-09-2014).pdf | 2014-09-10 |
| 10 | 2546-delnp-2014-Form-3-(18-09-2014).pdf | 2014-09-18 |
| 11 | 2546-delnp-2014-Correspondence-Others-(18-09-2014).pdf | 2014-09-18 |
| 12 | Marked Copy [18-11-2016(online)].pdf | 2016-11-18 |
| 13 | Form 13 [18-11-2016(online)].pdf | 2016-11-18 |
| 14 | Description(Complete) [18-11-2016(online)].pdf | 2016-11-18 |
| 15 | 2546-DELNP-2014-FER.pdf | 2019-01-08 |
| 16 | 2546-DELNP-2014-OTHERS [26-03-2019(online)].pdf | 2019-03-26 |
| 17 | 2546-DELNP-2014-FORM 3 [26-03-2019(online)].pdf | 2019-03-26 |
| 18 | 2546-DELNP-2014-FER_SER_REPLY [26-03-2019(online)].pdf | 2019-03-26 |
| 19 | 2546-DELNP-2014-CORRESPONDENCE [26-03-2019(online)].pdf | 2019-03-26 |
| 20 | 2546-DELNP-2014-COMPLETE SPECIFICATION [26-03-2019(online)].pdf | 2019-03-26 |
| 21 | 2546-DELNP-2014-CLAIMS [26-03-2019(online)].pdf | 2019-03-26 |
| 22 | 2546-DELNP-2014-ABSTRACT [26-03-2019(online)].pdf | 2019-03-26 |
| 23 | 2546-DELNP-2014-RELEVANT DOCUMENTS [10-06-2019(online)].pdf | 2019-06-10 |
| 24 | 2546-DELNP-2014-FORM 13 [10-06-2019(online)].pdf | 2019-06-10 |
| 25 | 2546-DELNP-2014-Power of Attorney-120619.pdf | 2019-06-21 |
| 26 | 2546-DELNP-2014-OTHERS-120619.pdf | 2019-06-21 |
| 27 | 2546-DELNP-2014-FORM 3 [21-06-2019(online)].pdf | 2019-06-21 |
| 28 | 2546-DELNP-2014-Correspondence-120619.pdf | 2019-06-21 |
| 29 | 2546-DELNP-2014-PatentCertificate28-09-2021.pdf | 2021-09-28 |
| 30 | 2546-DELNP-2014-IntimationOfGrant28-09-2021.pdf | 2021-09-28 |
| 31 | 2546-DELNP-2014-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
Search Strategy
| 1 | 2546-DELNP-2014_12-07-2018.pdf |