Title:
STAINLESS STEEL MATERIAL HAVING ANTIBACTERIAL PROPERTIES AND ANTIVIRAL PROPERTIES AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/149725
Kind Code:
A1
Abstract:
Provided is a stainless steel material which contains Cu that is an antibacterial component, has excellent antibacterial properties and excellent antiviral properties, and has a color tone of a stainless steel. The present invention is a stainless steel material having antibacterial properties and antiviral properties, the stainless steel material containing a Cu-rich region 3 in which the concentration of Cu (copper) is higher than the average Cu concentration in a matrix along grain boundaries in a surface 1 of the stainless steel material and a surface layer 2 located immediately below the surface of the stainless steel material, wherein the Cu-rich region 3 is a region in which the concentration is as high as 5% by mass or more relative to the above-mentioned average Cu concentration and has Cu grain boundary layers 6 that extend continuously at a depth of 10 μm to 200 μm from the surface 1 of the stainless steel material, the average number of the Cu grain boundary layers 6 is 2.0 or more per 100 μm of a distance parallel to the surface of the stainless steel material in a cross section orthogonal to the surface of the stainless steel material, and the chromatic index a* in a CIE Lab color space on the above-mentioned surface is 0 to 3.0 inclusive.
Inventors:
KAWANO AKINORI (JP)
EHARA YASUHIRO (JP)
MORIMOTO KENICHI (JP)
SUETSUGU TERUHIKO (JP)
EHARA YASUHIRO (JP)
MORIMOTO KENICHI (JP)
SUETSUGU TERUHIKO (JP)
Application Number:
PCT/JP2021/001861
Publication Date:
July 29, 2021
Filing Date:
January 20, 2021
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP (JP)
International Classes:
C25D5/50
Foreign References:
| JPH11106987A | 1999-04-20 | |||
| JPH1015041A | 1998-01-20 | |||
| JP2014141735A | 2014-08-07 | |||
| JP3139016U | 2008-01-31 | |||
| JP2011236499A | 2011-11-24 | |||
| JPH0853738A | 1996-02-27 | |||
| JP2000192259A | 2000-07-11 | |||
| JP2016196700A | 2016-11-24 | |||
| JPH1176642A | 1999-03-23 | |||
| JP2001179631A | 2001-07-03 |
Other References:
See also references of EP 4095289A4
Attorney, Agent or Firm:
HAYASHI Kazuyoshi et al. (JP)
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