Title:
NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR MANUFACTURING SAME, AND MOTOR CORE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/121295
Kind Code:
A1
Abstract:
A non-oriented electrical steel sheet according to an embodiment of the present invention comprises: a steel sheet base material containing, in wt%, 2.0-6.5% of Si, 0.1-1.3% of Al, 0.3-2.0% of Mn, and 0.005-0.06% of Cr, with the remainder comprising Fe and inevitable impurities; and an insulation coating disposed on the steel sheet base material, wherein Expression 1 is satisfied before stress relief annealing and Expression 2 is satisfied after stress relief annealing. Expression 1: 0.1 ≥ [Mn coating] / [Mn50], Expression 2: 10 ≥ [Mn coating] / [Mn50] ≥ 1 (In Expression 1 and Expression 2, [Mn coating] represents the average Mn content (wt%) in the insulation coating, and [Mn50] represents the Mn content (wt%) at a depth of 50 μm into the steel sheet base material from the interface between the steel sheet base material and the insulation coating)
Inventors:
KWON SOOBIN (KR)
Application Number:
PCT/KR2022/020964
Publication Date:
June 29, 2023
Filing Date:
December 21, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/34; C21D8/12; C22C38/06; C22C38/20; C22C38/22; C22C38/28; C22C38/32; C22C38/38; H01F1/147; H02K15/02
Foreign References:
| KR20190003783A | 2019-01-09 | |||
| KR20050057106A | 2005-06-16 | |||
| KR20150004639A | 2015-01-13 | |||
| KR20120051388A | 2012-05-22 |
Other References:
CHOI DONGMYUNG; KIM TAEHYUNG; YANG CHULHO; NAM JINSU; PARK JUNYOUNG: "Discrete element method and experiments applied to a new impeller blade design for enhanced coverage and uniformity of shot blasting", SURFACE AND COATINGS TECHNOLOGY, ELSEVIER, NL, vol. 367, 1 January 1900 (1900-01-01), NL , pages 262 - 270, XP085663246, ISSN: 0257-8972, DOI: 10.1016/j.surfcoat.2019.04.008
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
Download PDF:
Previous Patent: NON-ORIENTED ELECTRICAL STEEL SHEET AND MOTOR CORE COMPRISING SAME
Next Patent: ANTENNA MODULE AND ELECTRONIC DEVICE COMPRISING SAME
Next Patent: ANTENNA MODULE AND ELECTRONIC DEVICE COMPRISING SAME