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Title:
NICKEL-CONTAINING STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/136829
Kind Code:
A1
Abstract:
A nickel-containing steel sheet according to one aspect of the present invention has a chemical composition falling within a specified range, also having an average coarse grain diameter of prior austenite of 20 μm or less and tensile strength of 690 to 900 MPa, wherein the average coarse grain diameter of prior austenite is defined as a simple average value of largest equivalent circle diameters of the prior austenite grains respectively in 10 viewing fields each having an area of 200 μm2 as measured on a plane formed by each of the rolling direction of the steel sheet and the thickness direction of the steel sheet at a position corresponding to the depth of 1/4t of the steel sheet.

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Inventors:
FURUYA HITOSHI (JP)
WATANABE KENTARO (JP)
MORI KEISUKE (JP)
ASABA MASAKAZU (JP)
SUEMATSU YOSHIAKI (JP)
Application Number:
PCT/JP2018/048244
Publication Date:
July 02, 2020
Filing Date:
December 27, 2018
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/54; C21D8/02
Foreign References:
JP2011021243A2011-02-03
JP2003160811A2003-06-06
JP2008075107A2008-04-03
JPH0827517A1996-01-30
JP2008081776A2008-04-10
JP2005226080A2005-08-25
JP2002161341A2002-06-04
Other References:
See also references of EP 3699310A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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