Title:
Inside, a high-carbon-steel board, and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6274304
Kind Code:
B2
Abstract:
A middle/high carbon steel sheet according to an aspect of the present invention is a steel sheet, in which composition thereof contains, by mass%, C: 0.10% to 1.50%, Si: 0.01% to 1.00%, Mn: 0.01% to 3.00%, P: 0.0001% to 0.1000%, and S: 0.0001 % to 0.1000%, and a remainder consisting of Fe and impurities, in which the steel sheet has a structure in which a total volume percentage of a martensite, a bainite, a pearlite, and a residual austenite is equal to or lower than 5.0%, and a remainder thereof is a ferrite and carbides, in which a spheroidizing ratio of carbide particles is 70% to 99%, and in which a proportion of a number of the carbide particles including a crystal interface at which an orientation difference is equal to or greater than 5° in the carbide particles is equal to or lower than 20% of a total number of the carbide particles.
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Inventors:
Kengo Takeda
Tomosei Toshima
Tsutsuno Houji
Aramaki Takashi
Tomosei Toshima
Tsutsuno Houji
Aramaki Takashi
Application Number:
JP2016506209A
Publication Date:
February 07, 2018
Filing Date:
March 09, 2015
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
C22C38/00; C21D9/46; C22C38/60
Domestic Patent References:
| JP2007119883A | ||||
| JP2008291304A | ||||
| JP2007270331A | ||||
| JP2012062496A | ||||
| JP2007031762A | ||||
| JP2003183775A |
Attorney, Agent or Firm:
Masatake Shiga
Mitsuo Teramoto
Sumio Tanai
Tomoo Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Sumio Tanai
Tomoo Katsumata
Hiroshi Yamaguchi