Title:
鋼材およびその製造方法、タンクおよびその製造方法
Document Type and Number:
Japanese Patent JP7338792
Kind Code:
B2
Abstract:
Provided are a steel material, a method for producing the steel material, a tank, and a method for producing the tank. A steel material of the present invention has a chemical composition containing, in mass%, C: 0.200% or more and 0.700% or less, Si: 0.05% or more and 1.00% or less, Mn: 20.0% or more and 40.0% or less, P: 0.030% or less, S: 0.0050% or less, Al: 5.00% or less, Cr: 7.0% or less, N: 0.0500% or less, O: 0.0050% or less, Ti: less than 0.005%, Nb: less than 0.005%, and one or two or more selected from Ca: 0.0100% or less, Mg: 0.0100% or less, and REM: 0.0200% or less, the balance being iron and incidental impurities, in which a microstructure has a maximum grain size of less than 200 µm at a position 1 mm below a surface of the steel material.
Inventors:
Izumi Daichi
Rinno Ishida
Keiji Ueda
Rinno Ishida
Keiji Ueda
Application Number:
JP2022527101A
Publication Date:
September 05, 2023
Filing Date:
January 25, 2022
Export Citation:
Assignee:
JFE Steel Corporation
International Classes:
C22C38/00; B21D11/20; B21D51/18; C21D8/02; C22C30/02; C22C38/38; C22C38/58; F16J12/00; F17C3/00
Domestic Patent References:
| JP2017155300A | ||||
| JP2020537714A | ||||
| JP3161120A |
Foreign References:
| WO2018105510A1 | ||||
| WO2019044928A1 | ||||
| WO2018199145A1 |
Attorney, Agent or Firm:
Tetsuro Isomura
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori
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