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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16b
SUMMARY:Magnetic properties improvement in electrical grade steels with silicon less than 1 percent
DESCRIPTION:The CRNO steels are mainly used as core materials in electrical motors and transformers as they are the group of electrical steels with Isotropic Magnetic properties, meaning magnetic properties are practically same in all directions of magnetization in the plane of material. The essential magnetic properties requirement for these steels are low core loss values and high permeability. Thin gauge, clean steel and optimum grain size are required to achieve the desired magnetic properties in CRNO steels.
Electrical steels with Si ranging less than 1% showed significant variation in permeability (B50), where it varied from 1.69 to 1.77 T and average core loss value was 5.48 (W15/50). Since the permeability and the core loss depends on the steel cleanliness detailed investigation was carried out to find the factors primarily influencing it, and it was found that the presence of inclusion size above 10 μm resulted in lower permeability and higher core loss. 
Hence in this grade use of Tundish Gas Diffuser (TGD) and an Inert working lining (OBL™) was experimented for forced flotation of inclusions through argon bubbling inside the tundish and to prevent generation of inclusion by reaction of the steel with the tundish working lining. Extensive numerical and physical simulations have been conducted to determine the position and the flow of argon thru the TGD. Average inclusion size reduced from 12 μm to < 8 μm in HR coil with the use of diffuser and the inert working lining. The permeability variation has reduced from 0.08T to 0.05T (i.e 1.72 to 1.77 T) and the Average core loss value reduced to 5.32 (W15/50).

In addition to these refractory enhancements, JSW V has significantly improved and stabilized the various processes involved from steel making to casting.

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DTSTART:20230615T153000
DTEND:20230615T155000
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