ANNUALING SEPARATION AGENT FOR PRODUCING GRAIN-ORIENTED SILICON STEEL WITH SMOOTH SURFACE AND GOOD MAGNETIC PROPERTY
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United States of America Patent
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Issued Date -
Nov 7, 2013
app pub date -
Apr 14, 2011
filing date -
Oct 25, 2010
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Abandoned
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Abstract
An annealing separator for manufacturing grain-oriented silicon steel with mirror-like surface having good magnetic performance consists of the composition of which is 77˜98 by wt % of Al2O3 powder, 1˜8 by wt % of alkaline earth powder, 1˜15 by wt % of alkali metal chloride and/or alkaline earth metal chloride. The annealing separator of the invention can avoid forming a glass-film undercoating on the surface of the steel sheet during high-temperature annealing, and at the same time, the oxide embedded at near-surface of the sheet is removed by means of corrosive reaction of the chloride, so that a produce with smooth surface and stable magnetic performance is obtained.
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