Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.3043/MUM/2011 A
(19) INDIA
(22) Date of filing of Application :28/10/2011 (43) Publication Date : 21/06/2013
(54) Title of the invention : NON-ORIENTED ELECTRICAL STEEL SHEET FOR MOTOR  MATERIAL FOR
MOTOR ROTOR  AND MATERIAL FOR MOTOR STATOR
(51) International classification :H02K1/18
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(71)Name of Applicant :
1)JFE STEEL CORPORATION
Address of Applicant :2-3 Uchisaiwai-cho 2-chome
Chiyoda-ku Tokyo 100-0011 Japan.
(72)Name of Inventor :
1)NAKANISHI Tadashi
2)ZAIZEN Yoshiaki
3)ODA Yoshihiko
4)TODA Hiroaki
(57) Abstract :
An object of the present invention is to provide a non-oriented electrical steel sheet having high magnetic flux density which,
when a rotor material and a stator material are collected from the same steel sheet thereof, can attain satisfactorily high magnetic
flux density and satisfactorily high strength in the rotor material and also attain satisfactorily high magnetic flux density and
satisfactorily low iron loss in the stator material. Another object of the present invention is to provide members for a motor by
using the non-oriented electrical steel sheet. Specifically, the present invention provides a non-oriented electrical steel sheet for a
motor, comprising a component composition including in mass%: Si: 0.1% to 1.2%; Mn: 0.005% to 0.30%; C: 0.0050 % or less;
Solute Al: 0.0004 % or less; N: 0.0025 % or less; S: 0.0030 % or less; and the remainder as Fe and incidental impurities, wherein
the average recrystallized grain diameter (D) of the steel sheet subjected to final annealing is in the range of 6 mm to 25 mm,
number per unit of continuous non-metallic inclusions with grain growth inhibition dispersed in the steel sheet is 1000/cm2 or
less, and magnetic flux density B1 is equal to or larger than 0.8T and magnetic flux density B50 is equal to or larger than 1.7T.
No. of Pages : 31 No. of Claims : 8
The Patent Office Journal 21/06/2013 13538