EP0752012A1 - Verfahren zur herstellung von elektroblechen mit einem glasüberzug - Google Patents
Verfahren zur herstellung von elektroblechen mit einem glasüberzugInfo
- Publication number
- EP0752012A1 EP0752012A1 EP95912252A EP95912252A EP0752012A1 EP 0752012 A1 EP0752012 A1 EP 0752012A1 EP 95912252 A EP95912252 A EP 95912252A EP 95912252 A EP95912252 A EP 95912252A EP 0752012 A1 EP0752012 A1 EP 0752012A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annealing separator
- additive
- mgo
- strip
- cold
- 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
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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties of ferrous metals or ferrous alloys 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
- H01F1/18—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets with insulating coating
Definitions
- the invention relates to a process for the production of electrical sheets, in particular grain-oriented electrical sheets, with a uniform, well-adhering glass film and with improved magnetic properties, in which the hot strip initially produced and optionally annealed is cold rolled down to the final strip thickness with at least one cold rolling stage, then an annealing separator is applied to the strip rolled to the final thickness and dried, and then the cold-coated strip is subjected to a high temperature annealing, an essential component of the annealing separator being an aqueous magnesium oxide (MgO) dispersion and the annealing separator additionally at least has an additive.
- MgO aqueous magnesium oxide
- decarburization annealing is carried out after rolling to the final thickness.
- the carbon is extracted from the material.
- An oxide layer forms as a base layer on the strip surface, the main components of which are silicon dioxide (Si0 2 ) and fayalite (Fe_Si ⁇ « ).
- the strip is coated with an anti-adhesive layer and subjected to long-term annealing in the coil.
- the adhesive protection layer is intended to prevent the individual coil turns from sticking together during long-term annealing and, on the other hand, to form an insulation layer (glass film) with the base layer on the strip surface.
- the adhesive protection layer consists essentially of magnesium oxide (MgO).
- the MgO is slurried in water in the form of a powder, applied to the belt and dried. During this process, part of the magnesium oxide reacts with the water to form magnesium hydroxide (Mg (0H) 2 ).
- Mg (0H) 2 magnesium hydroxide
- Equation (I) represents the dehydration of the magnesium hydroxide, which starts at about 350 ° C.
- it is important that the amount of water released is within certain limits.
- the water humidifies and thus adjusts the predominantly hydrogen-containing atmosphere
- the annealing atmosphere must not be too dry because the glass film would be made too thin under such conditions, but it must also not be too moist because it will be reoxidized too much and the glass film will show defects such as local chipping and poor adhesion .
- additives to MgO powder were introduced to improve the formation of the insulation layer and the magnetic properties of the finished product.
- These include titanium dioxide (Ti0 2 ), boron compounds such as boron oxide (B 2 0 3 ) or sodium tetraborate (Na 3 B 4 0-.),
- antimony compounds such as antimony sulfate (Sb 2 (S0 _,) -) in combination with a chloride , preferably antimony chloride SbCl 3 .
- the additives used show next to However, the positive influences on the respective target variables often also have disadvantages that reduce product quality. Overall, the processing of such additives is cumbersome, since some of them have to be dissolved in previously heated water.
- the invention is based on the object of taking measures, in particular by modifying the glow separator, in order to further improve the insulation properties and at the same time the magnetic properties of the finished product.
- the aim is sticking prevention layer can be applied homogeneously to quality-reducing phenomena such as Glühkonturen • and local defects to avoid.
- easy handling should be guaranteed and the costs, measured against the standard, should be kept low.
- a finely dispersed oxidic aluminum compound is used as at least one additive.
- a readily water-soluble sodium phosphate compound is used as at least one additive.
- a readily water-soluble sodium phosphate compound and a finely dispersed oxidic aluminum compound can be added to the annealing separator in combination.
- the good water solubility of the sodium phosphate compound or the finely dispersed distribution of the oxidic aluminum compound ' in preferred amounts according to the subclaims ensure a homogeneous application of the adhesive protection, prevent coagulation within the aqueous magnesium oxide dispersion and associated local defects in the glass film and promote the chemical reactions occurring in long-term annealing between the base layer on the belt surface and the anti-adhesive layer for the glass film.
- the magnetic properties of the electrical sheets are improved by a glass formation which is more intensive than the standard and which has a positive influence on the interaction between the annealing atmosphere and the strips.
- a method with the generic measures has been known from EP 0 232 537 B1.
- a titanium compound such as TiO 2
- a boron compound such as B 2 O 3
- a sulfur compound such as SrS
- the positive influence on the magnetic properties on which the invention is based is characteristic of the sodium phosphates.
- Fig. 1 shows the superiority of the samples produced by the method according to the invention with a sodium phosphate-doped MgO-based adhesive protection over other phosphate additives.
- HGO high permeability grain oriented
- the sodium phosphates are readily water-soluble, thus enabling an optimally homogeneous distribution within the adhesive protection layer.
- the use of the sodium phosphates, shown here in particular using the example of the sodium pyrophosphate decahydrate improves both the magnetic properties of polarization and loss of magnetization and the formation of insulation.
- the inhibitor test procedure demonstrates that the sodium pyrophosphate leads to prematurely stronger glass film formation.
- the inhibitor test is a process in which high-temperature annealing is stopped at certain annealing temperatures and the samples are magnetically assessed. In the present case, the insulation training was also assessed.
- the magnetic properties of magnetic loss P 1> 7 and polarization J 800 were determined on the annealed strips.
- the aluminum compounds used are aluminum oxides or hydroxides of the form Al 2 0 3 , Al (OH) 3 and AlO (OH), the effect of which is fully exploited when the corresponding particle sizes are small. The effect is particularly evident when the compounds are added in the form of sols (very fine particles / water mixtures).
- the addition of these aluminum compounds leads to a considerable improvement in loss, similar to the case with the addition of titanium dioxide.
- the advantage of the aluminum compound as an additive over titanium dioxide is the lower dosage and the more homogeneous distribution of the particles. Another advantage lies in the fact that the aluminum compounds added also have the property of a ceramic binder, and the adhesive protective layer therefore adheres better to the tape.
- additives mentioned above are optimized if suitable combinations of additives are used. This also has positive effects in combination with additives already used, such as titanium dioxide, antimony sulfate and sodium tetraborate. Based on the slurry properties and thus on the homogeneity of the MgO A combination of a finely dispersed oxidic aluminum compound and a readily water-soluble sodium phosphate has proven to be optimal, since with these additives significantly fewer local defects are observed.
- the magnetic properties of magnetic loss P 1 # 7 and polarization J 800 were determined on the annealed strips.
- Table 7 Example of a combination of new additives compared to the state of the
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Dispersion Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Chemical Treatment Of Metals (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Cell Separators (AREA)
- Insulating Bodies (AREA)
- Inorganic Insulating Materials (AREA)
- Glass Compositions (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4409691 | 1994-03-22 | ||
| DE4409691A DE4409691A1 (de) | 1994-03-22 | 1994-03-22 | Verfahren zur Herstellung von Elektroblechen mit einem Glasüberzug |
| PCT/EP1995/001020 WO1995025820A1 (de) | 1994-03-22 | 1995-03-18 | Verfahren zur herstellung von elektroblechen mit einem glasüberzug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0752012A1 true EP0752012A1 (de) | 1997-01-08 |
| EP0752012B1 EP0752012B1 (de) | 1998-08-26 |
Family
ID=6513410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95912252A Expired - Lifetime EP0752012B1 (de) | 1994-03-22 | 1995-03-18 | Verfahren zur herstellung von elektroblechen mit einem glasüberzug |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5863356A (de) |
| EP (1) | EP0752012B1 (de) |
| JP (1) | JP3730254B2 (de) |
| KR (1) | KR100367985B1 (de) |
| AT (1) | ATE170226T1 (de) |
| CZ (1) | CZ292216B6 (de) |
| DE (2) | DE4409691A1 (de) |
| PL (1) | PL178890B1 (de) |
| RU (1) | RU2139945C1 (de) |
| WO (1) | WO1995025820A1 (de) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3475258B2 (ja) * | 1994-05-23 | 2003-12-08 | 株式会社海水化学研究所 | セラミック被膜形成剤およびその製造方法 |
| DE19750066C1 (de) | 1997-11-12 | 1999-08-05 | Ebg Elektromagnet Werkstoffe | Verfahren zum Beschichten von Elektrostahlbändern mit einem Glühseparator |
| AU2001252636A1 (en) * | 2000-05-01 | 2001-11-12 | Tateho Chemical Industries Co., Ltd. | Magnesium oxide particle aggregate |
| KR100572802B1 (ko) * | 2000-10-25 | 2006-04-19 | 다테호 가가쿠 고교 가부시키가이샤 | 산화 마그네슘 입자 집합체 |
| RU2298592C2 (ru) * | 2002-03-28 | 2007-05-10 | Ниппон Стил Корпорейшн | Листовая электротехническая сталь с ориентированными зернами, обладающая исключительно высокой адгезией пленки, и способ ее производства |
| DE102004014596A1 (de) * | 2004-03-23 | 2005-10-27 | Trithor Gmbh | Antihaftbeschichtung für die Herstellung von Kompositwerkstoff-Drähten |
| KR101165430B1 (ko) * | 2006-11-22 | 2012-07-12 | 신닛뽄세이테쯔 카부시키카이샤 | 피막 밀착성이 우수한 일방향성 전자 강판 및 그 제조법 |
| JP5633178B2 (ja) * | 2010-04-27 | 2014-12-03 | Jfeスチール株式会社 | 方向性電磁鋼板用焼鈍分離剤 |
| DE102010038038A1 (de) * | 2010-10-07 | 2012-04-12 | Thyssenkrupp Electrical Steel Gmbh | Verfahren zum Erzeugen einer Isolationsbeschichtung auf einem kornorientierten Elektro-Stahlflachprodukt und mit einer solchen Isolationsbeschichtung beschichtetes Elektro-Stahlflachprodukt |
| CN102453793B (zh) * | 2010-10-25 | 2013-09-25 | 宝山钢铁股份有限公司 | 用于具有优良磁性能的镜面取向硅钢制备的退火隔离剂 |
| US10208372B2 (en) * | 2011-01-12 | 2019-02-19 | Nippon Steel & Sumitomo Metal Corporation | Grain-oriented electrical steel sheet and manufacturing method thereof |
| JP5360272B2 (ja) * | 2011-08-18 | 2013-12-04 | Jfeスチール株式会社 | 方向性電磁鋼板の製造方法 |
| CN103857827B (zh) * | 2011-10-04 | 2016-01-20 | 杰富意钢铁株式会社 | 取向性电磁钢板用退火分离剂 |
| DE102015114358B4 (de) | 2015-08-28 | 2017-04-13 | Thyssenkrupp Electrical Steel Gmbh | Verfahren zum Herstellen eines kornorientierten Elektrobands und kornorientiertes Elektroband |
| KR101909218B1 (ko) | 2016-12-21 | 2018-10-17 | 주식회사 포스코 | 방향성 전기강판용 소둔 분리제 조성물, 방향성 전기강판 및 방향성 전기강판의 제조방법 |
| JP6939767B2 (ja) * | 2018-12-27 | 2021-09-22 | Jfeスチール株式会社 | 方向性電磁鋼板用焼鈍分離剤および方向性電磁鋼板の製造方法 |
| JP6939766B2 (ja) * | 2018-12-27 | 2021-09-22 | Jfeスチール株式会社 | 方向性電磁鋼板用焼鈍分離剤および方向性電磁鋼板の製造方法 |
| CN111906142B (zh) * | 2020-06-24 | 2022-08-16 | 浙江博星工贸有限公司 | 一种控制冷轧不锈钢带力学性能的工艺 |
| CN114014529B (zh) * | 2021-12-17 | 2023-02-21 | 中国建筑材料科学研究总院有限公司 | 一种硼硅酸盐玻璃珠火抛用的隔离剂 |
| CN114854960B (zh) * | 2022-03-30 | 2023-09-05 | 武汉钢铁有限公司 | 一种减少取向硅钢表面缺陷的退火隔离剂及其使用方法 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3151000A (en) * | 1959-08-28 | 1964-09-29 | Hooker Chemical Corp | Method of applying highly heat resistant protective coatings to metallic surfaces |
| US3151997A (en) * | 1961-09-29 | 1964-10-06 | United States Steel Corp | Separating-medium coating for preparation of electrical steel strip for annealing |
| US3615918A (en) * | 1969-03-28 | 1971-10-26 | Armco Steel Corp | Method of annealing with a magnesia separator containing a decomposable phosphate |
| SU569653A1 (ru) * | 1976-01-04 | 1977-08-25 | Уральский научно-исследовательский институт черных металлов | Состав дл термоизол ционного покрыти |
| US4160681A (en) * | 1977-12-27 | 1979-07-10 | Allegheny Ludlum Industries, Inc. | Silicon steel and processing therefore |
| JPS55138021A (en) * | 1979-04-11 | 1980-10-28 | Nippon Steel Corp | Manufacture of annealing separation agent for electromagnetic steel plate |
| IT1127263B (it) * | 1978-11-28 | 1986-05-21 | Nippon Steel Corp | Sostanza di separazione da utilizzare nella fase di ricottura di strisce di acciaio al silicio a grani orientati |
| GB2130241B (en) * | 1982-09-24 | 1986-01-15 | Nippon Steel Corp | Method for producing a grain-oriented electrical steel sheet having a high magnetic flux density |
| US4582547A (en) * | 1984-05-07 | 1986-04-15 | Allegheny Ludlum Steel Corporation | Method for improving the annealing separator coating on silicon steel and coating therefor |
| JPS62156226A (ja) * | 1985-12-27 | 1987-07-11 | Nippon Steel Corp | 均一なグラス皮膜を有し磁気特性が優れた方向性電磁鋼板の製造方法 |
| US4909864A (en) * | 1986-09-16 | 1990-03-20 | Kawasaki Steel Corp. | Method of producing extra-low iron loss grain oriented silicon steel sheets |
| US4740251A (en) * | 1986-12-22 | 1988-04-26 | Calgon Corporation | Method for improving magnesium oxide steel coatings |
| JPH0649949B2 (ja) * | 1988-10-18 | 1994-06-29 | 新日本製鐵株式会社 | 打抜き性と磁気特性の優れた金属光沢を有する方向性電磁鋼板の製造方法 |
| DE69015060T2 (de) * | 1989-09-08 | 1995-04-27 | Armco Inc | Magnesiumoxyd-Beschichtung für Elektrobleche und Beschichtungsverfahren. |
| JPH05247661A (ja) * | 1992-03-04 | 1993-09-24 | Nippon Steel Corp | 均一なグラス被膜を有し、磁気特性の優れた方向性電磁鋼板の製造方法 |
| DE69332394T2 (de) * | 1992-07-02 | 2003-06-12 | Nippon Steel Corp., Tokio/Tokyo | Kornorientiertes Elektroblech mit hoher Flussdichte und geringen Eisenverlusten und Herstellungsverfahren |
-
1994
- 1994-03-22 DE DE4409691A patent/DE4409691A1/de not_active Withdrawn
-
1995
- 1995-03-18 DE DE59503345T patent/DE59503345D1/de not_active Expired - Lifetime
- 1995-03-18 PL PL95316139A patent/PL178890B1/pl unknown
- 1995-03-18 CZ CZ19962738A patent/CZ292216B6/cs not_active IP Right Cessation
- 1995-03-18 EP EP95912252A patent/EP0752012B1/de not_active Expired - Lifetime
- 1995-03-18 RU RU96119243A patent/RU2139945C1/ru active
- 1995-03-18 KR KR1019960705227A patent/KR100367985B1/ko not_active Expired - Lifetime
- 1995-03-18 WO PCT/EP1995/001020 patent/WO1995025820A1/de not_active Ceased
- 1995-03-18 US US08/704,579 patent/US5863356A/en not_active Expired - Lifetime
- 1995-03-18 AT AT95912252T patent/ATE170226T1/de not_active IP Right Cessation
- 1995-03-18 JP JP52437895A patent/JP3730254B2/ja not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9525820A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4409691A1 (de) | 1995-09-28 |
| PL178890B1 (pl) | 2000-06-30 |
| JP3730254B2 (ja) | 2005-12-21 |
| US5863356A (en) | 1999-01-26 |
| JPH09510503A (ja) | 1997-10-21 |
| EP0752012B1 (de) | 1998-08-26 |
| DE59503345D1 (de) | 1998-10-01 |
| KR100367985B1 (ko) | 2003-08-02 |
| ATE170226T1 (de) | 1998-09-15 |
| CZ273896A3 (en) | 1997-04-16 |
| RU2139945C1 (ru) | 1999-10-20 |
| PL316139A1 (en) | 1996-12-23 |
| KR970701795A (ko) | 1997-04-12 |
| CZ292216B6 (cs) | 2003-08-13 |
| WO1995025820A1 (de) | 1995-09-28 |
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Legal Events
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