Insulation coating treatment liquid for grain-oriented electrical steel sheet, method for producing same, and method for producing grain-oriented electrical steel sheet
AssigneeNippon Steel Corporation
InventorsShinsuke TAKATANI, Kazutoshi TAKEDA, Atsushi SHIBAYAMA
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Abstract
Provided is an insulation coating treatment liquid for a grain-oriented electrical steel sheet including: metal phosphate of one or more metals selected from among Na, Al, Fe, Mg, Mn, Ni, Zn, Co, Mo, V, W, and Zr, and colloidal silica, wherein a Na2O/SiO2 ratio in mass % between an amount of Na in terms of Na2O and an amount of Si in terms of SiO2 in the insulation coating treatment liquid is 0.5% or more and 10% or less.
Claims3
An insulation coating treatment liquid for a grain-oriented electrical steel sheet, comprising:
- metal phosphate of one or more metals among Na, Al, Fe, Mg, Mn, Ni, Zn, Co, Mo, V, W, and Zr, and colloidal silica,
- wherein a Na2O/SiO2 ratio in mass % between an amount of Na in terms of Na2O and an amount of Si in terms of SiO2 in the insulation coating treatment liquid is 0.5% or more and 10% or less.
A method for producing an insulation coating treatment liquid for a grain-oriented electrical steel sheet, comprising:
- an adding process in which a Na compound is added to metal phosphate of one or more metals among Al, Fe, Mg, Mn, Ni, Zn, Co, Mo, V, W, and Zr, and
- a mixing process in which the colloidal silica and the metal phosphate with the added Na compound are mixed to make a Na2O/SiO2 ratio in mass % between an amount of Na in terms of Na2O and an amount of Si in terms of SiO2 in the insulation coating treatment liquid 0.5% or more and 10% or less.
Dependencies are inferred from the claim text.