Title:
HOT ROLLING METHOD FOR NONORIENTED SILICON STEEL SHEET HAVING EXTREMELY SUPERIOR MAGNETIC PROPERTY
Document Type and Number:
Japanese Patent JP2536974
Kind Code:
B2
Abstract:
PURPOSE: To produce a nonoriented silicon steel sheet having extremely excellent magnetic properties by applying low temp. heating to a slab in order to prevent inclusions, such as MnS and AlN, from entering into solid solution again by using an atmosphere control type electric heating furnace.
CONSTITUTION: At the time of hot-rolling a slab for nonoriented silicon steel having a composition consisting of ≤0.0080% C, ≤4% Si, 0.02-0.6% Mn, ≤0.1% P, ≤0.0050% S, ≤1.0% Al, ≤0.0030% N, and the balance essentially Fe, the slab is heated up to ≤1150°C by means of an atmosphere control type electric heating furnace provided to the position adjacent to a rougher, roughed directly after extraction from the furnace, and successively subjected to finish rolling. By this method, the nonoriented silicon steel sheet having extremely superior magnetic properties, such as iron loss, can be obtained.
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Inventors:
MOCHINAGA KISHIO
TONE KAZUTAKA
TONE KAZUTAKA
Application Number:
JP9562491A
Publication Date:
September 25, 1996
Filing Date:
April 25, 1991
Export Citation:
Assignee:
SHINNIPPON SEITETSU KK
International Classes:
C21D8/12; C21D9/00; C22C38/00; C22C38/06; (IPC1-7): C21D8/12; C21D9/00
Domestic Patent References:
| JP63418A | ||||
| JP60190521A | ||||
| JP6139152U | ||||
| JP4415047B1 |
Attorney, Agent or Firm:
Hiroaki Tamura (1 outside)