Japan, Feb. 27 -- NIPPON STEEL CORP has got intellectual property rights for 'PRODUCTION METHOD OF GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET.' Other related details are as follows:
Application Number: JP,2022-064807
Category (FI): C21D8/1216,C21D8/1205,H01F1/147,183,C22C38/60,C22C38/00,303@U,C21D8/12@B,C21D8/1277,C21D8/1244
Stage: PROBLEM TO BE SOLVED: To provide a method for producing a grain-oriented electromagnetic steel sheet for obtaining a high magnetic flux density and suppressing dispersion of the magnetic flux density.SOLUTION: In a production method of a grain-oriented electromagnetic steel sheet of an embodiment, a cold rolling step includes a tandem rolling step and a reverse rolling step. In the tandem rolling step, an average diameter D1 of a plurality of work rolls used in a plurality of passes is set to 200 mm or more, and a cumulative reduction ratio CR1 is set to 30-87%. In the reverse rolling step, an average diameter D2 of the plurality of work rolls used in the plurality of passes is set to 100 mm or less, and a cumulative reduction ratio CR2 is set to 24-86%. In a decarburization annealing step, an average heating rate HR in the range of 550-750degC of the cold-rolled steel sheet is 100degC/sec or more.SELECTED DRAWING: Figure 1 (Grant)
Filing Date: April 8, 2022
Publication Date: Oct. 20, 2023
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
