Title:
炭素鋼鋳片及び炭素鋼鋳片の製造方法
Document Type and Number:
Japanese Patent JP7027858
Kind Code:
B2
Abstract:
To provide a carbon steel slab containing REM to improve the toughness of a welding heat affected zone by utilizing the inclusions as pinning particles.SOLUTION: The carbon steel slab contains C, Si, Mn, P, Al, t.S, t.Ti, t.O, t.N and contains t.Ca, t.Zr, t.REM within a range satisfying a prescribed formula, and the balance is composed of iron and impurities. REM phosphide is precipitated with ZrS as a precipitation nucleus in the slab. The number density of the REM phosphide having a circle equivalent diameter of 0.05 μm or more and 1.0 μm or less is 200/mmor more, and the number density of the inclusions having a circle equivalent diameter exceeding 10 μm is less than 5/mm.SELECTED DRAWING: None
Inventors:
Takemasa Murao
Miyazaki Masafumi
Naoji Tsuyoshi
Morohoshi Takashi
Miyazaki Masafumi
Naoji Tsuyoshi
Morohoshi Takashi
Application Number:
JP2017237187A
Publication Date:
March 02, 2022
Filing Date:
December 11, 2017
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; B22D1/00; B22D11/00; B22D11/108; B22D11/128; B22D11/20; C21C7/04; C21C7/06; C22C38/14
Domestic Patent References:
| JP3254340A | ||||
| JP2016216819A | ||||
| JP2016199806A | ||||
| JP2013213242A | ||||
| JP2010209461A | ||||
| JP2016164289A | ||||
| JP2017150067A | ||||
| JP2012241267A |
Foreign References:
| WO2014103629A1 |
Attorney, Agent or Firm:
Sumio Tanai
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi
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