Title:
HIGH STRENGTH STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2018/151331
Kind Code:
A1
Abstract:
A high strength steel plate including a plate thickness center section and surface layer softened sections that are arranged on one side or both sides of the plate thickness center section, having a tensile strength of at least 800 MPa, and being characterized by: each surface layer softened section having a thickness of over 10 µm and no more than 30% of the plate thickness; the average Vickers hardness of the surface layer softened sections being no more than 0.60 times the average Vickers hardness of a position at half the plate thickness; and the standard deviation in nano hardness of the surface layer softened sections being no more than 0.8.
Inventors:
NAKANO KATSUYA (JP)
SUZUKI YUYA (JP)
ABUKAWA GENKI (JP)
HAYASHI KUNIO (JP)
SUZUKI YUYA (JP)
ABUKAWA GENKI (JP)
HAYASHI KUNIO (JP)
Application Number:
PCT/JP2018/006084
Publication Date:
August 23, 2018
Filing Date:
February 20, 2018
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C21D9/46; C22C38/60; C23C2/06
Domestic Patent References:
| WO2011152017A1 | 2011-12-08 | |||
| WO2013047819A1 | 2013-04-04 | |||
| WO2014181728A1 | 2014-11-13 | |||
| WO2016111271A1 | 2016-07-14 | |||
| WO2016111272A1 | 2016-07-14 | |||
| WO2016111273A1 | 2016-07-14 | |||
| WO2016111274A1 | 2016-07-14 | |||
| WO2016111275A1 | 2016-07-14 | |||
| WO2016199922A1 | 2016-12-15 | |||
| WO2016013145A1 | 2016-01-28 |
Foreign References:
| JPH10130782A | 1998-05-19 | |||
| JP2005273002A | 2005-10-06 | |||
| JP2017002384A | 2017-01-05 | |||
| JP2015034334A | 2015-02-19 | |||
| JP2015117403A | 2015-06-25 |
Other References:
See also references of EP 3584344A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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