Title:
AUSTENITIC STAINLESS STEEL HAVING EXCELLENT ELECTRICAL CONDUCTIVITY, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2020/251103
Kind Code:
A1
Abstract:
The present invention relates to austenitic stainless steel having excellent electrical conductivity in which metallic copper is formed in a non-conductive passivation film that is formed on the surface of the stainless steel, and a method for manufacturing same. Austenitic stainless steel having excellent electrical conductivity, according to one embodiment of the present invention, comprises: a stainless steel base material comprising, in percentage by weight, C: 0.1% or less, Si: 0.1% to 1.0% or less, Mn: 0.1% to 2.0% or less, Cr: 15% to 24% or less, Ni: 6% to 12% or less, Cu: 0.5% to 3% or less, and the remainder being Fe and unavoidable impurities; and a passivation film formed on the stainless steel base material, wherein the passivation film has a thickness of more than 0 nm and 5 nm or less, and the content in percentage by weight of Cu in a thickness region between 2 nm to 3 nm from the surface of the passivation film is 1.5 or more compared to the content in percentage by weight of Cu of the stainless steel base material.
Inventors:
KIM KWANG MIN (KR)
PARK MI-NAM (KR)
SEO BO-SUNG (KR)
PARK MI-NAM (KR)
SEO BO-SUNG (KR)
Application Number:
PCT/KR2019/007244
Publication Date:
December 17, 2020
Filing Date:
June 14, 2019
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/40; C22C38/58; C23C22/06
Foreign References:
| JP2004002960A | 2004-01-08 | |||
| JP2007027032A | 2007-02-01 | |||
| KR20170101528A | 2017-09-06 | |||
| JPH0860302A | 1996-03-05 | |||
| US20030116536A1 | 2003-06-26 | |||
| KR20190140661A | 2019-12-20 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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