Title:
HOT-ROLLED STEEL STRIP ANNEALING METHOD, AND ELECTROMAGNETIC STEEL SHEET PRODUCTION METHOD USING SAID ANNEALING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/009783
Kind Code:
A1
Abstract:
Provided is a technology whereby it becomes possible to highly accurately control a steel strip temperature on the heated strip outlet side and a steel strip temperature on the isothermal heating furnace outlet side in the hot-rolled annealing of a hot-rolled steel strip. A hot-rolled steel strip is annealed in an annealing facility in which a rapid heating device is provided, and an annealing treatment model that is trained in advance by machine learning using an operation parameter and a steel strip temperature performance as teacher data is used. According to this model, a hot-rolled steel strip annealing method is provided, in which the heating temperature of a rapid heating device or a heating condition for a rapid heating device, including a heating temperature and a heated strip, is predicted in such a manner that the difference between a predicted value and a target value of the annealing temperature for the hot-rolled steel strip can be decreased. Alternatively, an electromagnetic steel sheet production model is used, which is trained in advance by machine learning using teacher data including the temperature distribution of a slab or a hot-rolled steel strip and the magnetic properties of an electromagnetic steel sheet. According to this model, an electromagnetic steel sheet production method is provided, which includes a step for predicting an annealing temperature for a hot-rolled steel strip at which the variation in magnetic properties is reduced, setting the prediction as a target value, and reducing the difference between the target value and the predicted value of the annealing temperature by an annealing treatment model.
Inventors:
KOBAYASHI HIROKAZU (JP)
Application Number:
PCT/JP2023/023093
Publication Date:
January 11, 2024
Filing Date:
June 22, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/46; C21D9/56; C21D11/00; C22C38/00; C22C38/02
Foreign References:
| JP2018066040A | 2018-04-26 | |||
| JP2014148731A | 2014-08-21 | |||
| JP2022024340A | 2022-02-09 | |||
| CN201265027Y | 2009-07-01 |
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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