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US 2011/0236581 A1Published application
Treatment solution for insulation coating for grain-oriented electrical steel sheets and method for producing grain-oriented electrical steel sheet having insulation coating
AssigneeJfe Steel Corporation
InventorsMineo Muraki, Minoru Takashima, Tomofumi Shigekuni
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Abstract
A treatment solution for insulation coating for grain-oriented electrical steel sheets contains at least one selected from phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn; colloidal silica in a proportion of 0.5 to 10 mol in terms of SiO2 and a water-soluble vanadium compound in a proportion of 0.1 to 2.0 mol in terms of V, relative to PO4:1 mol in the phosphates.
Claims10
A treatment solution for an insulation coating of grain-oriented electrical steel sheets, comprising:
- at least one selected from phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn;
- and
- colloidal silica in a proportion of 0.5 to 10 mol in terms of SiO2 and a water-soluble vanadium compound in a proportion of 0.1 to 2.0 mol in terms of V, relative to PO4:1 mol in the phosphates.
A method for producing a grain-oriented electrical steel sheet having an insulation coating, comprising:
- rolling a slab for grain-oriented electrical steel sheets into a sheet with a final thickness,
- subjecting the sheet to primary recrystallization annealing,
- subjecting the sheet to secondary recrystallization annealing,
- coating the sheet with a treatment solution for insulation coating, and then baking the sheet,
- wherein the treatment solution comprises at least one selected from phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn;
- colloidal silica in a proportion of 0.5 to 10 mol in terms of SiO2 and a water-soluble vanadium compound in a proportion of 0.1 to 2.0 mol in terms of V, relative to PO4:1 mol in the phosphates.
3 more elements
Dependencies are inferred from the claim text.