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KAWASAKI STEEL TECHNICAL REPORT
No.39 ( October 1998 )
Electrical Steel
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History and Recent Development of Grain Oriented Electrical Steel at Kawasaki Steel

Nobuyuki Morito, Michiro Komatsubara, Yoh Shimizu.
Synopsis:
Since Kawasaki Steel had begun to manufacture a grain oriented electrical steel sheet "RG" in 1961, it was always seeking after a low iron loss technology to have successfully made the commercialization of "thin gage RGH" (0.23 mm, 0.20 mm in thickness) having high magnetic flux density and low iron loss, in 1981. Then, Kawasaki Steel has developed "RGH PJ" by using plasma jet and "RGH PD" of fine grooving to reduce iron loss, both of which materials obtain a high evaluation as core materials for low iron loss transformers. Recently a heat-resistant domain-controlled new product "New RGH PD" exhibiting low iron loss has been commercialized by using a highly grain oriented electrical steel through the improvement of inhibitors RGH.
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