Effects of Cu Precipitates on Magnetic Properties of Nonoriented Electrical Steel

Author

Fujikura, Masahiro ; Murakami, Hidekuni ; Ushigami, Yoshiyuki ; Arai, Satoshi ; Iwata, Keiji

Author_Institution

Yawata R&D Lab., Nippon Steel & Sumitomo Metal Corp., Yawata, Japan

Volume

51

Issue

5

fYear

2015

fDate

May-15

Firstpage

1

Lastpage

4

Abstract

Tests to measure the effects of the precipitating size of Cu on the magnetic properties of nongrain-oriented (NGO) electrical steel were carried out. The hysteresis loss had a maximum value when the diameter of the precipitates was around the thickness of the domain wall and decreased rapidly with decreasing size of the precipitates. Alternatively, yield point (YP) rose steeply with reduction in the size of Cu precipitates. It can be confirmed that the precipitating Cu has an ability of rising over 100 MPa in YP without deteriorating core loss. Regarding the effects of Cu precipitates on the hysteresis loss, the surface tension effect might be dominant for the case in which precipitates are smaller than the domain wall thickness, and internal magnetic poles are effective for the larger precipitates.

Keywords

magnetic domain walls; magnetic hysteresis; precipitation hardening; steel; surface tension; yield point; domain wall; hysteresis loss; internal magnetic poles; magnetic properties; nongrain-oriented electrical steel; precipitates; precipitation hardening; surface tension effect; yield point; Aging; Core loss; Magnetic domain walls; Magnetic domains; Magnetic hysteresis; Steel; Domain wall pinning; Si-Fe; high tensile strength steel; precipitation hardening;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2365442

Filename

6936885