Title:
FERRITE STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/064920
Kind Code:
A1
Abstract:
Provided are: a ferrite stainless steel that exhibits at least a certain level of corrosion resistance and at least a certain level of tempering-color elimination performance; and a method for manufacturing said ferrite stainless steel. This ferrite stainless steel is characterized by: containing, by mass, 0.001-0.030% carbon, 0.03-0.30% silicon, up to 0.05% phosphorus, up to 0.01% sulfur, more than 22.0% but no more than 28.0% chromium, 0.2-3.0% molybdenum, 0.01-0.15% aluminum, more than 0.30% but no more than 0.80% titanium, 0.001-0.080% vanadium, and 0.001-0.050% nitrogen; either containing 0.05-0.30% manganese and 0.01-5.00% nickel or containing 0.05-2.00% manganese and 0.01-0.30% nickel; and containing optionally up to 0.05% niobium. This ferrite stainless steel is further characterized in that: the remainder thereof comprises iron and unavoidable impurities; and there are at least 30 TiN grains with diameters of at least 1 µm per square millimeter of the surface.
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Inventors:
ISHII TOMOHIRO (JP)
ISHIKAWA SHIN (JP)
OGATA HIROYUKI (JP)
OTA HIROKI (JP)
ISHIKAWA SHIN (JP)
OGATA HIROYUKI (JP)
OTA HIROKI (JP)
Application Number:
PCT/JP2013/006231
Publication Date:
May 01, 2014
Filing Date:
October 22, 2013
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C21D9/46; C22C38/58; C23G1/08
Domestic Patent References:
| WO2013080526A1 | 2013-06-06 |
Foreign References:
| JP2010065279A | 2010-03-25 | |||
| JPS5521102B2 | 1980-06-07 | |||
| JP2007270290A | 2007-10-18 | |||
| JP2007302995A | 2007-11-22 |
Other References:
See also references of EP 2910659A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Akira Kumasaka (JP)
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