Grain-oriented electrical steel plate and manufacturing method thereof
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United States of America Patent
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Oct 27, 2020
Grant Date -
Dec 28, 2017
app pub date -
Dec 21, 2015
filing date -
Dec 24, 2014
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Abstract
A grain-oriented electrical steel plate of an exemplary embodiment of the present invention has a groove formed on a surface, wherein a curvature radius RBb at a position where a depth of the groove is maximum is 0.2 μm to 100 μm, and a curvature radius RSb on the groove surface from the position where the depth of the groove is maximum to a quarter-way position of the depth D of the groove is 4 μm to 130 μm.
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