WO2002092861A1 - Verfahren und vorrichtung zum thermischen behandeln von metallsträngen, insbesondere von stahlband - Google Patents
Verfahren und vorrichtung zum thermischen behandeln von metallsträngen, insbesondere von stahlband Download PDFInfo
- Publication number
- WO2002092861A1 WO2002092861A1 PCT/EP2002/004800 EP0204800W WO02092861A1 WO 2002092861 A1 WO2002092861 A1 WO 2002092861A1 EP 0204800 W EP0204800 W EP 0204800W WO 02092861 A1 WO02092861 A1 WO 02092861A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- metal strand
- flux concentrator
- strands
- moving
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
- H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
- H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
Definitions
- the invention relates to a method and a device for the thermal treatment of metal strands, in particular steel strip, in which the metal strand which is in motion and moves at the speed corresponding to the predetermined production quantity is heated with the pursuit of high temperature gradients.
- the inductive band heating used is based on longitudinal or transverse field heating, with the dimensions of the magnet coils being a function of the band dimensions, the frequencies of the alternating fields used and the possible force field densities in the magnet coils depending on the frequencies used.
- the invention has for its object to provide and transfer the amount of heat required for the heat treatment of metal strips in high-speed metal strands in a short time.
- the object is achieved according to the invention in that by using a flux concentrator on the metal strand moving at high speed, the metal strand temperature is set in the millisecond to second range by inductive heating.
- a flux concentrator leads to a significant increase in the magnetic force field density in the processes of strip heating. It is an advantageous process of inductive cross-field heating.
- the method can also be applied favorably to processes of metal structure conversion after mechanical treatments. Sufficient heat can also be transferred here in a short time.
- Another application of the method is used to initiate diffusion and alloying processes in metallic coatings.
- a device for the thermal treatment of metal strands, in particular steel strip, which is surrounded by a magnetic field with a high magnetic field strength achieves the object according to the invention in that on each metal strand side - in the case of metal strips at least on the two flat sides - parallel to the plane of the metal strand side extending induction coils are arranged, the cavity of which is filled by means of a flux concentrator.
- the vector of the magnetic induction field strength is perpendicular to the strip surface.
- Coreless air coils are normally used due to the high operating frequencies. The resulting stray magnetic field is disadvantageously large.
- the flux concentrator is placed in the magnetic inserted coil for inductive cross-field heating and causes that no large stray field can form and the magnetic field strength is limited to the exit from the pole faces of the flux concentrator.
- the field densities are therefore very high and band heating over a short band length is possible.
- the flux concentrator is made from amorphous ferromagnetic material.
- the requirement of the amorphous material results from the high frequencies used for inductive band heating.
- the fact that the classic systems for inductive band heating led to meter-high coils is avoided by the flux concentrator in a magnetic coil, so that a significantly lower coil height is now sufficient.
- the flux concentrator is approximately bow-shaped and has parallel end faces spaced at both ends from the metal strand side. This makes alignment with the metal strand easier.
- the device it is provided that its arrangement in towers with a vertical metal strand guide and between pairs of guide rollers arranged at greater intervals in the direction of strip travel is advantageous. Since the magnetic coils are generally located in areas of production plants in which the metal strip, after coating for reasons of a high-quality surface, must not have any contact with the rolls for a certain time, such systems are used in towers with a vertical strip guide. The production costs for such towers are very high due to the requirements of inherent stability. Here, significantly lower heights of the solenoid coils and thus significantly reduced manufacturing costs have an advantageous effect. In the drawing, an embodiment of the device according to the invention is shown, which is explained in more detail below.
- Fig. 1 is a side view of the device with metal tape
- FIG. 1 is a front view of FIG .. 1
- the device for the thermal treatment of metal strands, in particular steel strip 1 has induction coils 4 running on each metal strand side 1a and 1b, in the case of steel strip 1 on the flat sides 2, parallel to the plane 3 of the metal strand sides 1a, 1b, the cavity 4a of which is by means of a flux Concentrator 5 is filled.
- the flux concentrator 5 is made of amorphous ferromagnetic material. As can be seen, the flux concentrator 5 has an approximately bow-shaped design and has end faces 5c that are parallel and spaced apart at both ends 5a and 5b to the metal strand side 1a and 1b.
- This device can be used in towers with a vertical metal strand guide and between pairs of guide rollers arranged at greater intervals in the direction of strip travel 6.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Coating With Molten Metal (AREA)
- General Induction Heating (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02769462A EP1390551B1 (de) | 2001-05-16 | 2002-05-02 | Verfahren und vorrichtung zum thermischen behandeln von metallsträngen, insbesondere von stahlband |
DE50209831T DE50209831D1 (de) | 2001-05-16 | 2002-05-02 | Verfahren und vorrichtung zum thermischen behandeln von metallsträngen, insbesondere von stahlband |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10123782.0 | 2001-05-16 | ||
DE10123782A DE10123782A1 (de) | 2001-05-16 | 2001-05-16 | Verfahren und Vorrichtung zum thermischen Behandeln von Metallsträngen, insbesondere von Stahlband |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002092861A1 true WO2002092861A1 (de) | 2002-11-21 |
Family
ID=7684971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/004800 WO2002092861A1 (de) | 2001-05-16 | 2002-05-02 | Verfahren und vorrichtung zum thermischen behandeln von metallsträngen, insbesondere von stahlband |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1390551B1 (de) |
AT (1) | ATE358189T1 (de) |
DE (2) | DE10123782A1 (de) |
TW (1) | TW555862B (de) |
WO (1) | WO2002092861A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB593195A (en) * | 1944-02-05 | 1947-10-10 | Westinghouse Electric Int Co | Improvements in or relating to heating of strip metal, and the like by electromagnetic induction |
EP0271614A1 (de) * | 1985-10-25 | 1988-06-22 | Nippon Light Metal Co., Ltd. | Elektromagnetisches Induktionsheizgerät |
US5179258A (en) * | 1989-05-17 | 1993-01-12 | Giovanni Arvedi | Induction furnace for heating and temperature homogenization in hot-rolling of thin steel strips |
US5578233A (en) * | 1991-12-18 | 1996-11-26 | Giovanni Arvedi | Induction furnace with linear flux concentrator |
-
2001
- 2001-05-16 DE DE10123782A patent/DE10123782A1/de not_active Withdrawn
-
2002
- 2002-04-17 TW TW091107823A patent/TW555862B/zh active
- 2002-05-02 WO PCT/EP2002/004800 patent/WO2002092861A1/de active IP Right Grant
- 2002-05-02 DE DE50209831T patent/DE50209831D1/de not_active Expired - Fee Related
- 2002-05-02 EP EP02769462A patent/EP1390551B1/de not_active Expired - Lifetime
- 2002-05-02 AT AT02769462T patent/ATE358189T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB593195A (en) * | 1944-02-05 | 1947-10-10 | Westinghouse Electric Int Co | Improvements in or relating to heating of strip metal, and the like by electromagnetic induction |
EP0271614A1 (de) * | 1985-10-25 | 1988-06-22 | Nippon Light Metal Co., Ltd. | Elektromagnetisches Induktionsheizgerät |
US5179258A (en) * | 1989-05-17 | 1993-01-12 | Giovanni Arvedi | Induction furnace for heating and temperature homogenization in hot-rolling of thin steel strips |
US5578233A (en) * | 1991-12-18 | 1996-11-26 | Giovanni Arvedi | Induction furnace with linear flux concentrator |
Also Published As
Publication number | Publication date |
---|---|
DE10123782A1 (de) | 2002-11-21 |
ATE358189T1 (de) | 2007-04-15 |
DE50209831D1 (de) | 2007-05-10 |
EP1390551B1 (de) | 2007-03-28 |
EP1390551A1 (de) | 2004-02-25 |
TW555862B (en) | 2003-10-01 |
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