Title:
DIRECTIONAL MAGNETIC STEEL PLATE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/139818
Kind Code:
A1
Abstract:
Provided are: a directional magnetic steel sheet experiencing little iron loss, even when the sheet contains at least one of the grain boundary segregated elements Sb, Sn, Mo, Cu, and P; and a method for producing the same. This method for producing a directional magnetic steel sheet involves controlling the line tension Pr (MPa) exerted on the secondary-recrystallized sheet in a planarization annealing step so as to satisfy the relationship Pr ≤ -0.075T + 18 (where T > 10, 5 < Pr), where T (hr) denotes the time required to lower the temperature of the secondary-recrystallized sheet from 800°C to 400°C after finish annealing is carried out. As a result, it is possible to obtain a low-iron-loss directional magnetic steel sheet in which the dislocation density close to the crystal grain boundaries of the base metal is 1.0 × 1013m-2 or less, even when the sheet contains at least one of the elements Sb, Sn, Mo, Cu, and P.
Inventors:
IMAMURA TAKESHI (JP)
TAKENAKA MASANORI (JP)
WAKISAKA YUIKO (JP)
TAKENAKA MASANORI (JP)
WAKISAKA YUIKO (JP)
Application Number:
PCT/JP2015/057224
Publication Date:
September 09, 2016
Filing Date:
March 05, 2015
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C21D8/12; C21D9/46; C22C38/60; H01F1/16
Foreign References:
| JPH09104923A | 1997-04-22 | |||
| JP2012052233A | 2012-03-15 | |||
| JP2013087299A | 2013-05-13 | |||
| JP2014196536A | 2014-10-16 | |||
| JP2009235472A | 2009-10-15 |
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
Download PDF:
Previous Patent: ANIMAL TOILET
Next Patent: GROUND-SHAPE ESTIMATION PROGRAM, GROUND-SHAPE ESTIMATION DEVICE, AND GROUND-SHAPE ESTIMATION METHOD
Next Patent: GROUND-SHAPE ESTIMATION PROGRAM, GROUND-SHAPE ESTIMATION DEVICE, AND GROUND-SHAPE ESTIMATION METHOD