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“High Toughness Abrasion Resistant Steel With Little Change In Hardness During Use And Method Of Production Of Same”
Abstract: The invention provides a wear-resistant steel which has a hardness of HB400 to HB520 and exhibits little hardness change in long-term service and which is excellent in toughness, namely, a steel which contains by mass C: 0.21 to 0.30%, Si: 0.30 to 1.00%, Mn: 0.32 to 0.70%, P: 0.02% or below, S: 0.01% or below, Cr: 0.1 to 2.0%, Mo: 0.1 to 1.0%, B: 0.0003 to 0.0030%, Al: 0.01 to 0.1%, and N: 0.01% or below, and further contains one or more of V: 0.01 to 0.1%, Nb: 0.005 to 0.05%, Ti: 0.005 to 0.03%, Ca: 0.0005 to 0.05%, Mg: 0.0005 to 0.05%, and REM: 0.001 to 0.1%, with the balance being Fe, characterized by having an M value of -10 to 16 as defined by the following formula (1): M = 26 × [Si] - 40 × [Mn] - 3 × [Cr] + 36 ...
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
07 March 2008
Publication Number
12/2009
Publication Type
INA
Invention Field
CHEMICAL
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2016-02-29
Renewal Date
Applicants
NIPPON STEEL CORPORATION
6-3 Otemachi 2-chome Chiyoda-ku Tokyo
1008071 (Japan)
Inventors
1. Naoki SAITOH
C/o NIPPON STEEL CORPORATION NAGOYA WORKS 5-3 Tokaimachi Tokai-shi Aichi 4768686 (Japan)
2. Tatsuya KUMAGAI
C/o NIPPON STEEL CORPORATION NAGOYA WORKS 5-3 Tokaimachi Tokai-shi Aichi 4768686 (Japan)
3. Katsumi KUREBAYASHI
C/o NIPPON STEEL CORPORATION 6-3 Otemachi 2-chome Chiyoda-ku Tokyo 1008071 (Japan)
4. Hirohide MURAOKA
C/o NIPPON STEEL CORPORATION NAGOYA WORKS 5-3 Tokaimachi Tokai-shi Aichi 4768686 (Japan)
Specification
The present invention relates to an abrasion resistant steel having the hardness of HB400 to HB520 required in construction machinery, .............
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 271702-PATENT CERTIFICATE-290216.pdf | 2024-08-19 |
| 1 | Form-5.pdf | 2011-08-21 |
| 2 | 1973-DELNP-2008-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 2 | Form-3.pdf | 2011-08-21 |
| 3 | Form-1.pdf | 2011-08-21 |
| 3 | 1973-DELNP-2008-RELEVANT DOCUMENTS [23-09-2022(online)].pdf | 2022-09-23 |
| 4 | Drawings.pdf | 2011-08-21 |
| 4 | 1973-DELNP-2008-RELEVANT DOCUMENTS [26-07-2021(online)].pdf | 2021-07-26 |
| 5 | 1973-DELNP-2008-RELEVANT DOCUMENTS [11-03-2020(online)].pdf | 2020-03-11 |
| 5 | 1973-delnp-2008-Form-3-(10-02-2012).pdf | 2012-02-10 |
| 6 | 1973-DELNP-2008-PROOF OF ALTERATION [13-09-2019(online)].pdf | 2019-09-13 |
| 6 | 1973-delnp-2008-Correspondence-Others-(10-02-2012).pdf | 2012-02-10 |
| 7 | 1973-DELNP-2008-RELEVANT DOCUMENTS [12-03-2019(online)].pdf | 2019-03-12 |
| 7 | 1973-delnp-2008-Form-3-(22-08-2012).pdf | 2012-08-22 |
| 8 | 271702-1973-DELNP-2008.pdf | 2018-12-17 |
| 8 | 1973-delnp-2008-Correspondence others-(22-08-2012).pdf | 2012-08-22 |
| 9 | 1973-delnp-2008-Form-3-(04-03-2013).pdf | 2013-03-04 |
| 9 | 1973-DELNP-2008-RELEVANT DOCUMENTS [19-03-2018(online)].pdf | 2018-03-19 |
| 10 | 1973-delnp-2008-Correspondence Others-(04-03-2013).pdf | 2013-03-04 |
| 10 | Form 27 [31-03-2017(online)].pdf | 2017-03-31 |
| 11 | 1973-DELNP-2008_EXAMREPORT.pdf | 2016-06-30 |
| 11 | FORM 13.pdf | 2014-06-09 |
| 12 | 1973-delnp-2008-Correspondence Others-(20-01-2016).pdf | 2016-01-20 |
| 12 | Petition of Form 3.pdf | 2014-10-07 |
| 13 | 1973-delnp-2008-Form-3-(20-01-2016).pdf | 2016-01-20 |
| 13 | 1973-delnp-2008-GPA-(09-10-2014).pdf | 2014-10-09 |
| 14 | 1973-delnp-2008-Correspondence Others-(09-07-2015).pdf | 2015-07-09 |
| 14 | 1973-delnp-2008-Form-3-(09-10-2014).pdf | 2014-10-09 |
| 15 | 1973-delnp-2008-Abstract-(09-10-2014).pdf | 2014-10-09 |
| 15 | 1973-delnp-2008-Form-2-(09-10-2014).pdf | 2014-10-09 |
| 16 | 1973-delnp-2008-Claims-(09-10-2014).pdf | 2014-10-09 |
| 16 | 1973-delnp-2008-Drawings-(09-10-2014).pdf | 2014-10-09 |
| 17 | 1973-delnp-2008-Correspondence Others-(09-10-2014).pdf | 2014-10-09 |
| 18 | 1973-delnp-2008-Drawings-(09-10-2014).pdf | 2014-10-09 |
| 18 | 1973-delnp-2008-Claims-(09-10-2014).pdf | 2014-10-09 |
| 19 | 1973-delnp-2008-Abstract-(09-10-2014).pdf | 2014-10-09 |
| 19 | 1973-delnp-2008-Form-2-(09-10-2014).pdf | 2014-10-09 |
| 20 | 1973-delnp-2008-Correspondence Others-(09-07-2015).pdf | 2015-07-09 |
| 20 | 1973-delnp-2008-Form-3-(09-10-2014).pdf | 2014-10-09 |
| 21 | 1973-delnp-2008-Form-3-(20-01-2016).pdf | 2016-01-20 |
| 21 | 1973-delnp-2008-GPA-(09-10-2014).pdf | 2014-10-09 |
| 22 | 1973-delnp-2008-Correspondence Others-(20-01-2016).pdf | 2016-01-20 |
| 22 | Petition of Form 3.pdf | 2014-10-07 |
| 23 | 1973-DELNP-2008_EXAMREPORT.pdf | 2016-06-30 |
| 23 | FORM 13.pdf | 2014-06-09 |
| 24 | Form 27 [31-03-2017(online)].pdf | 2017-03-31 |
| 24 | 1973-delnp-2008-Correspondence Others-(04-03-2013).pdf | 2013-03-04 |
| 25 | 1973-delnp-2008-Form-3-(04-03-2013).pdf | 2013-03-04 |
| 25 | 1973-DELNP-2008-RELEVANT DOCUMENTS [19-03-2018(online)].pdf | 2018-03-19 |
| 26 | 1973-delnp-2008-Correspondence others-(22-08-2012).pdf | 2012-08-22 |
| 26 | 271702-1973-DELNP-2008.pdf | 2018-12-17 |
| 27 | 1973-delnp-2008-Form-3-(22-08-2012).pdf | 2012-08-22 |
| 27 | 1973-DELNP-2008-RELEVANT DOCUMENTS [12-03-2019(online)].pdf | 2019-03-12 |
| 28 | 1973-delnp-2008-Correspondence-Others-(10-02-2012).pdf | 2012-02-10 |
| 28 | 1973-DELNP-2008-PROOF OF ALTERATION [13-09-2019(online)].pdf | 2019-09-13 |
| 29 | 1973-delnp-2008-Form-3-(10-02-2012).pdf | 2012-02-10 |
| 29 | 1973-DELNP-2008-RELEVANT DOCUMENTS [11-03-2020(online)].pdf | 2020-03-11 |
| 30 | 1973-DELNP-2008-RELEVANT DOCUMENTS [26-07-2021(online)].pdf | 2021-07-26 |
| 30 | Drawings.pdf | 2011-08-21 |
| 31 | Form-1.pdf | 2011-08-21 |
| 31 | 1973-DELNP-2008-RELEVANT DOCUMENTS [23-09-2022(online)].pdf | 2022-09-23 |
| 32 | Form-3.pdf | 2011-08-21 |
| 32 | 1973-DELNP-2008-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 33 | Form-5.pdf | 2011-08-21 |
| 33 | 271702-PATENT CERTIFICATE-290216.pdf | 2024-08-19 |