Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND SURFACE TREATMENT AGENT FOR NON-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/054450
Kind Code:
A1
Abstract:
This non-oriented electromagnetic steel sheet includes a base steel sheet and an insulating coating film formed on a surface of the base steel sheet. The insulating coating film comprises mainly a phosphoric acid metal salt, an organic resin and a water-soluble organic compound. The water-soluble organic compound has an SP value within the range 10.0-20.0 (cal/cm3)1/2. The phosphoric acid metal salt contains aluminum and zinc as metal elements. When photoelectron spectroscopy measurements are carried out in the thickness direction of the non-oriented electromagnetic steel sheet from the surface of the insulating coating film, the depth at which the intensity of a zinc 2p peak is a maximum value is further towards the surface side than the depth at which the intensity of an aluminum 2p peak is a maximum value, and the maximum intensity of a zinc 2p peak is 1-20 times the intensity of an aluminum 2p peak at the depth where the intensity of the zinc 2p peak is a maximum.
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Inventors:
TAKEDA KAZUTOSHI (JP)
YAMAZAKI SHUICHI (JP)
MATSUMOTO TAKUYA (JP)
FUJII HIROYASU (JP)
TAKAHASHI MASARU (JP)
YAMAZAKI SHUICHI (JP)
MATSUMOTO TAKUYA (JP)
FUJII HIROYASU (JP)
TAKAHASHI MASARU (JP)
Application Number:
PCT/JP2020/035519
Publication Date:
March 25, 2021
Filing Date:
September 18, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C22/00; C22C38/00; H01F1/18; C21D8/12; C21D9/46; C22C38/06
Foreign References:
| JP2017141480A | 2017-08-17 | |||
| JPH1180971A | 1999-03-26 |
Other References:
See also references of EP 4033005A4
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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