CA2024226A1 - Magnesium oxide coating for electrical steels and a method of coating - Google Patents
Magnesium oxide coating for electrical steels and a method of coatingInfo
- Publication number
- CA2024226A1 CA2024226A1 CA2024226A CA2024226A CA2024226A1 CA 2024226 A1 CA2024226 A1 CA 2024226A1 CA 2024226 A CA2024226 A CA 2024226A CA 2024226 A CA2024226 A CA 2024226A CA 2024226 A1 CA2024226 A1 CA 2024226A1
- Authority
- CA
- Canada
- Prior art keywords
- magnesia
- coating
- anneal
- glass film
- annealing separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title abstract 11
- 239000000395 magnesium oxide Substances 0.000 title abstract 6
- 239000011248 coating agent Substances 0.000 title abstract 4
- 238000000576 coating method Methods 0.000 title abstract 4
- 229910000831 Steel Inorganic materials 0.000 title 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 239000010959 steel Substances 0.000 title 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- 238000007792 addition Methods 0.000 abstract 2
- 238000000137 annealing Methods 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 2
- 230000036571 hydration Effects 0.000 abstract 2
- 238000006703 hydration reaction Methods 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 229910000976 Electrical steel Inorganic materials 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 229910052796 boron Inorganic materials 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 229910001510 metal chloride Inorganic materials 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 abstract 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 235000010215 titanium dioxide Nutrition 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Treatment Of Metals (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Decarburized grain oriented silicon steel is provided with an annealing separator which forms a glass film after the final high temperature anneal.
The magnesia used as the annealing separator has a total chlorine level of 0.01 to 0.20% by weight based on the weight of magnesia with at least 0.01 % metal chloride selected from the group of Mg, Ca, Na and K. The chloride addition acts to seal the coating surface during the final anneal to control diffusion and stabilize the secondary grain growth. The glass film which forms during the anneal may be laser scribed for domain refinement without coating damage. The magnesia may also contain additions of phosphates, TiO2, SiO2, Cr and B. The temperature of the magnesia is maintained below 25°C to control hydration and eliminate the need for other additives in the magnesia slurry to control hydration.
The magnesia used as the annealing separator has a total chlorine level of 0.01 to 0.20% by weight based on the weight of magnesia with at least 0.01 % metal chloride selected from the group of Mg, Ca, Na and K. The chloride addition acts to seal the coating surface during the final anneal to control diffusion and stabilize the secondary grain growth. The glass film which forms during the anneal may be laser scribed for domain refinement without coating damage. The magnesia may also contain additions of phosphates, TiO2, SiO2, Cr and B. The temperature of the magnesia is maintained below 25°C to control hydration and eliminate the need for other additives in the magnesia slurry to control hydration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40471489A | 1989-09-08 | 1989-09-08 | |
| US07/404,714 | 1989-09-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2024226A1 true CA2024226A1 (en) | 1991-03-09 |
| CA2024226C CA2024226C (en) | 2000-02-15 |
Family
ID=23600734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002024226A Expired - Fee Related CA2024226C (en) | 1989-09-08 | 1990-08-29 | Magnesium oxide coating for electrical steels and a method of coating |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0416420B1 (en) |
| JP (1) | JP2686455B2 (en) |
| KR (1) | KR0173781B1 (en) |
| BR (1) | BR9004444A (en) |
| CA (1) | CA2024226C (en) |
| DE (1) | DE69015060T2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2690841B2 (en) * | 1992-09-18 | 1997-12-17 | 新日本製鐵株式会社 | Annealing Separator for grain oriented electrical steel sheet for obtaining uniform high-strength glass coating and excellent magnetic properties |
| DE4409691A1 (en) * | 1994-03-22 | 1995-09-28 | Ebg Elektromagnet Werkstoffe | Process for the production of electrical sheets with a glass coating |
| JP3475258B2 (en) * | 1994-05-23 | 2003-12-08 | 株式会社海水化学研究所 | Ceramic film forming agent and method for producing the same |
| CN1065004C (en) * | 1994-11-16 | 2001-04-25 | 新日本制铁株式会社 | Process for producing directional electrical sheet excellent in glass coating and magnetic properties |
| KR100245032B1 (en) * | 1994-11-16 | 2000-03-02 | 아사무라 타카싯 | Process for producing directional sheet excellent in glass coating and magnetic properties |
| DE19750066C1 (en) * | 1997-11-12 | 1999-08-05 | Ebg Elektromagnet Werkstoffe | Process for coating electrical steel strips with an annealing separator |
| KR19990042456A (en) * | 1997-11-26 | 1999-06-15 | 성재갑 | Aerosol composition of hair treatment lotion and valve for injecting same |
| KR100435477B1 (en) * | 1999-12-27 | 2004-06-10 | 주식회사 포스코 | A method for manufacturing grain-oriented electrical steel sheet having no surface defects and superior punching property |
| DE102008039326A1 (en) | 2008-08-22 | 2010-02-25 | IWT Stiftung Institut für Werkstofftechnik | Preparing electrically insulated electric sheet, to prepare laminated magnetic core, comprises coating one side of sheet using liquid mixture comprising hydrolyzed and condensed metal organic monomer, and heat treating coated sheet |
| CN102453793B (en) * | 2010-10-25 | 2013-09-25 | 宝山钢铁股份有限公司 | Annealing isolation agent used for preparing mirror surface-oriented silicon steel with excellent magnetic property |
| WO2013120714A1 (en) | 2012-02-13 | 2013-08-22 | Solaronics S.A. | Cooling of coated sheet metal strip |
| KR102634154B1 (en) * | 2019-10-31 | 2024-02-05 | 제이에프이 스틸 가부시키가이샤 | Grain-oriented electrical steel sheet and method for producing same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231296B2 (en) * | 1973-06-07 | 1977-08-13 | ||
| US3841925A (en) * | 1973-09-12 | 1974-10-15 | Morton Norwich Products Inc | Magnesium oxide steel coating composition and process |
| US4032366A (en) * | 1975-05-23 | 1977-06-28 | Allegheny Ludlum Industries, Inc. | Grain-oriented silicon steel and processing therefor |
| BR7804962A (en) * | 1977-08-04 | 1979-05-08 | Armco Inc | PROCESS TO STABILIZE VISCOSITY AND INCREASE THE CONCENTRATION OF Aqueous MAGNESIA PASTE |
| JPS5466935A (en) * | 1977-11-09 | 1979-05-29 | Kawasaki Steel Co | Method of forming forsterite insulating layer in directive silicon steel plate |
| DE3875676T2 (en) * | 1987-08-31 | 1993-03-18 | Nippon Steel Corp | METHOD FOR PRODUCING CORNORIENTED STEEL SHEETS WITH METAL GLOSS AND EXCELLENT PUNCHABILITY. |
-
1990
- 1990-08-27 EP EP90116384A patent/EP0416420B1/en not_active Expired - Lifetime
- 1990-08-27 DE DE69015060T patent/DE69015060T2/en not_active Expired - Lifetime
- 1990-08-29 CA CA002024226A patent/CA2024226C/en not_active Expired - Fee Related
- 1990-09-06 BR BR909004444A patent/BR9004444A/en not_active IP Right Cessation
- 1990-09-07 JP JP2235992A patent/JP2686455B2/en not_active Expired - Lifetime
- 1990-09-08 KR KR1019900014201A patent/KR0173781B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0416420A2 (en) | 1991-03-13 |
| JPH03120376A (en) | 1991-05-22 |
| EP0416420A3 (en) | 1992-11-19 |
| KR0173781B1 (en) | 1999-02-18 |
| KR910006518A (en) | 1991-04-29 |
| EP0416420B1 (en) | 1994-12-14 |
| DE69015060D1 (en) | 1995-01-26 |
| BR9004444A (en) | 1991-09-10 |
| JP2686455B2 (en) | 1997-12-08 |
| DE69015060T2 (en) | 1995-04-27 |
| CA2024226C (en) | 2000-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |