Title:
METHOD FOR DETERMINING FINISH ANNEALING CONDITIONS FOR ORIENTED ELECTROMAGNETIC STEEL SHEET, AND METHOD FOR MANUFACTURING ORIENTED ELECTROMAGNETIC STEEL SHEET USING SAID DETERMINATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/186357
Kind Code:
A1
Abstract:
The present invention proposes a method which is for determining finish annealing conditions for an oriented electromagnetic steel sheet, and by which a high-quality oriented electromagnetic steel sheet, which meets strict quality requirements that have been implemented in recent years, can be manufactured at high yield due to having favorable film characteristics even in a part, such as an upper/lower part or an inwardly/outwardly winding part of a coil during finish annealing or the like, in which the characteristics of a forsterite underlying film easily deteriorate. When determining the finish annealing conditions, information on the concentration of an enriched component in the whole length and whole width of a steel sheet subjected to decarburization annealing is obtained, the optimum function of product characteristics in the relationship between the enriched component and finish annealing control conditions is obtained in advance, and then, in consideration of the distribution of the finish annealing control conditions in the coil, the finish annealing control conditions are determined so that the area, where the deviation of the ultimately obtained product characteristics from the aforementioned optimum function is in the range of ±δ, is maximum in terms of the whole length and the whole width.
Inventors:
WATANABE MAKOTO (JP)
TERASHIMA TAKASHI (JP)
YAMADA TAKUYA (JP)
TERASHIMA TAKASHI (JP)
YAMADA TAKUYA (JP)
Application Number:
PCT/JP2022/009253
Publication Date:
September 09, 2022
Filing Date:
March 03, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; C23C22/00; H01F1/147; C22C38/00; C22C38/60
Domestic Patent References:
| WO2020067136A1 | 2020-04-02 |
Foreign References:
| JP2020169373A | 2020-10-15 | |||
| JP2004292834A | 2004-10-21 | |||
| JPH05195239A | 1993-08-03 | |||
| KR20060013177A | 2006-02-09 | |||
| JP2000239736A | 2000-09-05 | |||
| JP2001303137A | 2001-10-31 | |||
| JPH08209248A | 1996-08-13 | |||
| JPH093541A | 1997-01-07 | |||
| JPH09111346A | 1997-04-28 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF: