Title:
METHOD FOR MANUFACTURING STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/191006
Kind Code:
A1
Abstract:
A method for manufacturing a steel sheet according to the present invention comprises a step for annealing a steel raw material having an Si content of 1.0 mass% or more and a Cr content of 1 mass% or less, under a condition satisfying: formula 1A if the Cr content of the steel raw material is 0.2-0.6 mass%; formula 1B if the Cr content of the steel raw material is less than 0.2 mass%; or formula 1C if the Cr content of the steel raw material is more than 0.6 mass% but not more than 1.0 mass% (in formula 1A, formula 1B, and formula 1C, T is 500°C or higher and represents the soaking retention temperature (°C) during annealing, t represents the soaking retention time (seconds) during annealing, and Cr [%] represents the Cr content (mass%) of the steel raw material).
Inventors:
MAEKAWA SHUYA
NAKAKUBO SHOHEI
OTOMO RYOSUKE
NAKAKUBO SHOHEI
OTOMO RYOSUKE
Application Number:
PCT/JP2022/008962
Publication Date:
September 15, 2022
Filing Date:
March 02, 2022
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21D9/46; C21D1/26; C21D9/52; C21D1/74; C21D1/76; C22C38/00; C22C38/60
Domestic Patent References:
| WO2020128811A1 | 2020-06-25 | |||
| WO2018092817A1 | 2018-05-24 | |||
| WO2016038801A1 | 2016-03-17 |
Foreign References:
| JP2020523473A | 2020-08-06 | |||
| JP2019505694A | 2019-02-28 | |||
| JP2021507985A | 2021-02-25 | |||
| JP2006233333A | 2006-09-07 | |||
| JP2000309824A | 2000-11-07 | |||
| JP2017222887A | 2017-12-21 | |||
| JP2021036228A | 2021-03-04 | |||
| JP2021204254A |
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
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