Recent development of non-oriented electrical steel sheet for automobile electrical devices

Effect of Phase Transformation and Latent Heat on Hot Rolling Deformation Behavior of Non-oriented Electrical Steel

“…Chao LIU, 1) Anrui HE, 1) * Yi QIANG 2) and Defu GUO (Received on November 9, 2016; accepted on January 19, 2017; J-STAGE Advance published date: April 4, 2017) In order to make up for the deficiency of the traditional austenite deformation resistance model and the existing rolling theory in the gage and shape control of hot rolled non-oriented electrical steel, the mathematical models related to phase transformation are established by regression analysis and then written to be ABAQUS subroutines, which are subsequently embedded into the heat transfer model and rolls-strip coupling model. The finite element models are used to accurately predict the transverse distribution of the temperature field and phase field, and analyze the effect of phase transformation and latent heat on the total roll force, distribution of per unit roll force and roll gap profile.…”

“…In addition to the requirements of magnetic properties of low iron loss and high magnetic induction, the gage and shape of strips as the most important indicator of dimensional precision have been paid more and more attention by producers and users. [1][2][3][4] The hot rolling production process of non-oriented electrical steel is almost the same as the carbon steel, but because of the particularity of material composition and rolling schedule related to product performance, which results in the beginning temperature of transformation is between the entrance temperature and finishing rolling temperature, the multiphase rolling is inevitable during hot finishing rolling, 5) as shown in Fig. 1.…”

Investigating the fatigue behavior of grain-oriented Fe-3%Si steel sheets using magnet-optical Kerr microscopy and micromagnetic multiparameter, microstructure and stress analysis

“…Electrical steels are considered as one of the conventional group of ferromagnetic materials well known to the magnetic community [2]. Their coarse magnetic domain structure, high magnetic flux density, and low iron loss have made this group of ferromagnetic materials suitable for usage in internal permanent magnet (IPM) motor cores [3,4]. Developments in the automobile industry focusing on electric vehicles (EV) and hybrid electric vehicles (HEV) as well as efforts to increase the fuel efficiency of internal combustion engines resulted in a progressively increasing demand for research and development on this material class in the recent years [3].…”

“…Their coarse magnetic domain structure, high magnetic flux density, and low iron loss have made this group of ferromagnetic materials suitable for usage in internal permanent magnet (IPM) motor cores [3,4]. Developments in the automobile industry focusing on electric vehicles (EV) and hybrid electric vehicles (HEV) as well as efforts to increase the fuel efficiency of internal combustion engines resulted in a progressively increasing demand for research and development on this material class in the recent years [3]. Since the rotor core of an IPM motor is subjected to centrifugal forces which undergo fluctuations due to variations in the rotational speed of the motor during operation, the electrical steels used for this application not only should have acceptable mechanical properties, but also must maintain their magnetic characteristics in order to ensure a durable and efficient electrically powered system.…”

Sintered powder cores of high B s and low coreloss Fe84.3Si4B8P3Cu0.7 nano-crystalline alloy

“…Many applications need low magnetic losses (W t ) and high magnetic flux density (B s > 1.5 T) at operating frequencies ( f ) ranging from a few tenth of Hz to several kHz. [2][3][4] In terms of high B s , steels are mostly preferred. But steels cannot be used at high frequencies due to their much higher core losses (especially the eddy current losses).…”