EP0998587B1 - Verfahren zur herstellung von kornorientiertem elektroblech - Google Patents
Verfahren zur herstellung von kornorientiertem elektroblech Download PDFInfo
- Publication number
- EP0998587B1 EP0998587B1 EP98945171A EP98945171A EP0998587B1 EP 0998587 B1 EP0998587 B1 EP 0998587B1 EP 98945171 A EP98945171 A EP 98945171A EP 98945171 A EP98945171 A EP 98945171A EP 0998587 B1 EP0998587 B1 EP 0998587B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- slab
- cold
- final
- hot
- 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.)
- Expired - Lifetime
Links
Images
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
- C21D8/1205—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 particular fabrication steps or treatments of ingots or slabs
- C21D8/1211—Rapid solidification; Thin strip casting
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/1205—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 particular fabrication steps or treatments of ingots or slabs
-
- 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
- C21D8/1216—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 characterised by the working steps
- C21D8/1222—Hot rolling
-
- 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
- C21D8/1216—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 characterised by the working steps
- C21D8/1233—Cold rolling
-
- 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
- C21D8/1244—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 characterised by the heat treatment
- C21D8/1255—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 characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
-
- 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
- C21D8/1244—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 characterised by the heat treatment
- C21D8/1261—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 characterised by the heat treatment following hot rolling
-
- 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
- C21D8/1244—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 characterised by the heat treatment
- C21D8/1272—Final recrystallisation annealing
-
- 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
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
Definitions
- the invention relates to a method for producing grain-oriented electrical sheet.
- the slab with a Starting temperature of at least 960 ° C and with a Final temperature in the range from 880 to 1000 ° C up to Final hot strip thickness in the range from 1.5 to 7.0 mm hot rolled.
- the hot strip is then 100 to 600 s long at a temperature in the range of 880 to 1150 ° C annealed and with a cooling rate of greater than 15 K / s cooled down.
- the hot strip is cold rolled to its final thickness.
- the cold strip becomes a recrystallizing glow in damp Atmosphere containing hydrogen and nitrogen subjected to simultaneous decarburization.
- DE 27 35 667 C2 also shows the need for a homogeneously solidified slab structure with grain-oriented electrical sheet.
- the use of continuous casting slabs is protected, in which at least 95% of the grains of a core zone have a maximum grain size of 9 mm 2 , as well as measures during continuous casting to make this possible.
- pre-rolling (DE 22 52 784 C, DE 23 16 808 B2), in which a deformation step is inserted between two stages of multi-stage slab preheating in order to reduce the dendritic structure, also has the same effect.
- the invention is based on the object the aforementioned scattering of the magnetic werece minimize and limit it to a narrow area.
- the invention is based on the knowledge that the strong Scattering of the magnetic property values on the Use of steel slabs as raw material for the Production of grain-oriented electrical sheet based have a stem crystal structure.
- Homogeneous slab structure can be Pour a molten steel with a Superheating temperature of max. 12 ° C above the Solidus temperature in the distribution vessel Achieve continuous caster like this from steel and iron (1982), p. 451 ff., Was known per se. This is the one Method that requires the least equipment connected is.
- the molten steel can also be used Inert gas in the continuous casting mold mechanically and / or with a center induction of 0.02 to 0.8 T in the Continuous casting molds are stirred electromagnetically, as at was known from steel and iron (1984), p. 435 ff.
- the slab structure can preferably solidify from the Continuous casting mold extended strand with water spray in cooled in an amount of at least 0.8 l / kg of molten steel become.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Continuous Casting (AREA)
- Formation And Processing Of Food Products (AREA)
Description
- Fig. 1
- zeigt die Höhe des Wattverlustes über die Länge eines 0,30 mm dicken Bandes, welches aus einer normal erzeugten Stahlbramme gewonnen wurde und
- Fig. 2
- zeigt den Wattverlust-Verlauf über die Länge eines Bandes gleicher Dicke, das aus einer in erfindungsgemäßer Weise hergestellten Stahlbramme erzeugt wurde.
Claims (4)
- Verfahren zur Herstellung von kornorientiertem Elektroblech, bei dem eine Bramme aus einem Stahl mit in Masse-%,
Rest Fe einschl. unvermeidbarer Verunreinigungen bei einer Temperatur, die tiefer als die Löslichkeitstemperatur für Mangansulfid, jedenfalls unter 1320 °C, aber oberhalb der Löslichkeitstemperatur für Kupfersulfide liegt, durcherwärmt wird, im Anschluß daran mit einer Anfangstemperatur von mindestens 960 °C und mit einer Endtemperatur im Bereich von 880 bis 1000 °C bis auf Warmband-Enddicke im Bereich von 1,5 bis 7,0 mm warmgewalzt wird, das Warmband danach 100 bis 600 s lang bei einer Temperatur im Bereich von 880 bis 1150 °C geglüht, sodann mit einer Abkühlrate von größer als 15 K/s abgekühlt und in einem oder mehreren Kaltwalzschritten bis auf Kaltband-Enddicke kaltgewalzt wird, worauf das Kaltband einer rekristallisierenden Glühung in feuchter Wasserstoff und Stickstoff enthaltender Atmosphäre mit gleichzeitiger Entkohlung unterworfen wird und nach dem beidseitigen Aufbringen eines im wesentlichen MgO enthaltenden Trennmittels hochtemperaturgeglüht und nach dem Aufbringen einer Isolierbeschichtung schlußgeglüht wird,mehr als 0,005 bis 0,10 % C, 2,5 bis 4,5 % Si, 0,03 bis 0,15 % Mn, mehr als 0,01 bis 0,05 % S 0,01 bis 0,035 % Al, 0,0045 bis 0,012 % N, 0,02 bis 0,3 % Cu,
dadurch gekennzeichnet, daß eine Bramme mit feinkörnigem globulitischem Gefüge verwendet wird, in dem mindestens 90 % der Körner einen Durchmesser von höchstens 1/25 der Brammendicke und einen Streckungsfaktor FShape = dmin/dmax von mindestens 0,5 aufweisen, wobei Korndurchmesser = Durchmesser eines flächenäquivalenten Kreises mit dmin = minimaler und dmax = maximaler realer Korndurchmesser. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß das homogene Brammengefüge durch das Vergießen einer Stahlschmelze mit einer Überhitzungstemperatur von maximal 12 °C über der Solidustemperatur in das Verteilergefäß der Stranggießanlage erzeugt wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Stahlschmelze mit Inertgas in der Stranggußkokille mechanisch und/oder mit einer Zentrumsinduktion von 0,02 bis 0,8 T in der Stranggußkokille elektromagnetisch gerührt wird. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß der aus der Stranggußkokille ausgezogene Strang mit Spritzwasser in einer Menge von mindestens 0,8 l/kg Stahlschmelze gekühlt wird.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19735062 | 1997-08-13 | ||
| DE19735062A DE19735062A1 (de) | 1997-08-13 | 1997-08-13 | Verfahren zur Herstellung von kornorientiertem Elektroblech und Verwendung eines Stahls für Elektroblech |
| PCT/EP1998/005008 WO1999009221A1 (de) | 1997-08-13 | 1998-08-06 | Verfahren zur herstellung von kornorientiertem elektroblech und verwendung eines stahls für elektroblech |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0998587A1 EP0998587A1 (de) | 2000-05-10 |
| EP0998587B1 true EP0998587B1 (de) | 2001-02-28 |
Family
ID=7838843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98945171A Expired - Lifetime EP0998587B1 (de) | 1997-08-13 | 1998-08-06 | Verfahren zur herstellung von kornorientiertem elektroblech |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0998587B1 (de) |
| KR (1) | KR20010022777A (de) |
| AT (1) | ATE199403T1 (de) |
| BR (1) | BR9811935A (de) |
| DE (2) | DE19735062A1 (de) |
| ES (1) | ES2156033T3 (de) |
| WO (1) | WO1999009221A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009117959A1 (zh) * | 2008-03-25 | 2009-10-01 | 宝山钢铁股份有限公司 | 一种高电磁性能取向硅钢的生产方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ305521B6 (cs) * | 2014-05-12 | 2015-11-11 | Arcelormittal Ostrava A.S. | Pás z orientované transformátorové oceli a způsob jeho výroby |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE790798A (fr) * | 1971-11-04 | 1973-02-15 | Armco Steel Corp | Procédé de fabrication de fer au silicium à orientation cube-sur-arete à partir de brames coulées |
| JPS5037009B2 (de) * | 1972-04-05 | 1975-11-29 | ||
| JPS5319913A (en) * | 1976-08-10 | 1978-02-23 | Nippon Steel Corp | Preparation of unidirectional silicon steel sheet superior in magnetism from continuous casting slab |
| JPS6037172B2 (ja) * | 1978-03-11 | 1985-08-24 | 新日本製鐵株式会社 | 一方向性珪素鋼板の製造法 |
| DE4311151C1 (de) * | 1993-04-05 | 1994-07-28 | Thyssen Stahl Ag | Verfahren zur Herstellung von kornorientierten Elektroblechen mit verbesserten Ummagnetisierungsverlusten |
| DE19628136C1 (de) * | 1996-07-12 | 1997-04-24 | Thyssen Stahl Ag | Verfahren zur Herstellung von kornorientiertem Elektroblech |
-
1997
- 1997-08-13 DE DE19735062A patent/DE19735062A1/de not_active Withdrawn
-
1998
- 1998-08-06 DE DE59800501T patent/DE59800501D1/de not_active Expired - Fee Related
- 1998-08-06 BR BR9811935-4A patent/BR9811935A/pt not_active IP Right Cessation
- 1998-08-06 ES ES98945171T patent/ES2156033T3/es not_active Expired - Lifetime
- 1998-08-06 WO PCT/EP1998/005008 patent/WO1999009221A1/de not_active Ceased
- 1998-08-06 EP EP98945171A patent/EP0998587B1/de not_active Expired - Lifetime
- 1998-08-06 AT AT98945171T patent/ATE199403T1/de not_active IP Right Cessation
- 1998-08-06 KR KR1020007001377A patent/KR20010022777A/ko not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009117959A1 (zh) * | 2008-03-25 | 2009-10-01 | 宝山钢铁股份有限公司 | 一种高电磁性能取向硅钢的生产方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2156033T3 (es) | 2001-06-01 |
| DE19735062A1 (de) | 1999-02-18 |
| EP0998587A1 (de) | 2000-05-10 |
| KR20010022777A (ko) | 2001-03-26 |
| ATE199403T1 (de) | 2001-03-15 |
| BR9811935A (pt) | 2000-08-29 |
| WO1999009221A1 (de) | 1999-02-25 |
| DE59800501D1 (de) | 2001-04-05 |
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