• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention consists of an apparatus 14 and an induction heating method for heating a non-magnetic metal strip 1 in circulation in a continuous treatment line comprising a coating section 20, the apparatus being implanted downstream of said section of coating in the running direction of the strip, the apparatus for raising the temperature of the strip to the level required to achieve the desired change in its coating, the heater comprising at least one transverse flux inductor.
    公开号:FR3014449A1
    申请号:FR1362272
    申请日:2013-12-06
    公开日:2015-06-12
    发明作者:Emmanuel Patard
    申请人:Fives Celes；
    IPC主号:
    专利说明:

    [0001] The invention relates to continuous galvanizing lines for steel coils, and more particularly to the galvanizing tower. It relates to an apparatus and a method of heating the transverse flow induction strip for heating non-magnetic steel grades in the galvanic annealing process. Demand for galvanized steel with high mechanical performance is growing rapidly worldwide. This is particularly true in the automotive sector where the use of these steels reduces the thickness of the sheets for the same strength. The gain in weight resulting from the reduction of the thicknesses results in a lower consumption of the vehicles and therefore less CO2 emissions. Steels with high manganese content are particularly interesting because they combine a high mechanical strength and a strong aptitude for forming by stamping. The sheet used for automobile bodywork is often coated according to the galvanic annealing process. In this process, a step is added after galvanizing by dipping the strip. It consists of a heating of the galvanized steel strip at the outlet of the zinc bath, followed by a holding phase. In this step, the zinc layer is modified by the diffusion of the iron from the sheet and zinc from the coating which leads to the creation of an alloy between the metal support and the zinc layer. This annealing after galvanization increases the weldability of the coated sheet and improves the surface quality of the sheet after painting. Reheating of the web in an annealing section after galvanizing is traditionally performed by longitudinal flux induction heating equipment. It has the advantage of transmitting a high power density to the band thus reducing the length of the equipment. The compactness of the heating equipment is indeed crucial in the galvanizing tower because the addition of a annealing step after galvanizing causes a sharp increase in the height of the tower because of the length of the equipment to be installed for ensure the reheating and maintenance of the band and the additional cooling thereof. The length of the holding equipment is defined by the time required to ensure the diffusion of the metals. Since the heat input is limited, the heating of the strip is generally carried out by electrical resistors. The strip edges naturally have a tendency to cool more than the rest of the strip in the annealing maintenance section after galvanizing. in the cooling section that follows. To remedy this problem, FR2661423 describes the addition of shore heating devices. This solution is not fully satisfactory because it requires the installation of additional equipment to overcome this problem. Annealing after galvanizing is not used for all qualities of galvanized sheet. It is necessary to take the galvanized annealing equipment offline when not in use to replace it with cooling ducts. In principle, longitudinal flux induction heating equipment comprises a coil that surrounds the strip. To allow offline heating equipment, it is necessary to provide an inductor that can open. The complexity of such equipment, for example described by JP2903449, makes this solution attractive. High manganese steels generally have an austenitic structure at room temperature and are non-magnetic. Induction heating with longitudinal flux is no longer possible for these steels because of the very low heating efficiency. Thus, there is currently no induction heating device in galvanized annealing sections for coating nonmagnetic steels. The solution 15 according to the state of the art consists in installing equipment equipped with burners or electrical resistances but leads to an over-length of the equipment due to limited power densities. The invention provides a solution to the aforementioned problems particularly advantageous for the annealing after galvanizing nonmagnetic steels, allowing 20 to have a very compact heating section, which can easily be taken offline, and which allows to overheat the banks. The invention thus provides, in a first aspect, an induction heating apparatus for heating a non-magnetic metal strip in circulation in a continuous treatment line comprising a coating section, the apparatus being installed downstream of said coating section in the running direction of the strip, the apparatus for raising the temperature of the strip to the level required to achieve the desired change in its coating, characterized in that the heater comprises at least one transverse flux inductor. With a transverse flux inductor, the magnetic flux is directed perpendicular to the surface of the strip. In contrast, the magnetic flux is tangent to the band surface during longitudinal flow heating. The transverse flow induction allows to heat non-magnetic materials with a very good energy efficiency and high power densities. In practice, the transverse flux inductor is composed of two magnetic pole structures located on either side of the strip to be heated, with excitation coils. The alternating current in the coils is polarized so that, at all times, the magnetic poles facing each other are of opposite signs, which forces the magnetic flux to pass through the strip. The implementation of a transverse flux inductor for reheating of the strip in an annealing section after galvanization is made complex because of the need to obtain an optimum heating quality for the different bandwidths. Thus, the apparatus according to the invention has coils whose dimensions are adapted so as to influence the transverse temperature profile of the strip and to obtain an overheating of the edges of the strip. According to an alternative embodiment of the invention, the apparatus comprises movable screens laterally in the running direction of the strip, so that an adjustment of the position of the screens makes it possible to adjust an overheating of the edges of the strip. The transverse flux inductor may comprise a single pair of coils or at least two pairs of coils. The choice of the number of pairs of coils will in particular depend on the characteristics of the band to be heated and the production capacity of the line.
    [0002] The invention also provides, according to a second aspect, an induction heating method for heating a non-magnetic metal strip circulating in a continuous treatment line downstream of a coating section in the direction of travel of the band, the temperature of the strip being raised to the level required to obtain the desired change in its coating, characterized in that the heating of the strip is achieved by means of a transverse flux inductor. Thus, the coating section of the line allows dipping galvanization and heating according to the invention allows for annealing after galvanization. According to the invention, to anticipate the additional cooling of the banks resulting from the edge effect, the banks of the strip are directly superheated by the transverse flux inductor. The characteristics and advantages of the invention will appear on reading the description which follows, which is given by way of nonlimiting example and with reference to the following appended figures: FIG. 1: schematically represents a coating section of a galvanizing line for the treatment of magnetic steels comprising annealing after galvanization with longitudinal flux induction heating according to the state of the art, - Figure 2: schematically illustrates the magnetic flux which results from a longitudinal flux inductor, FIG. 3 schematically illustrates the magnetic flux that results from a transverse flux inductor; FIG. 4 shows schematically an embodiment of an induction heating apparatus according to the invention, and FIG. in sectional view, an embodiment of an induction heating apparatus according to the invention showing in particular the use of removable screens. In Figure 1 is shown schematically a galvanizing tower 21 of a galvanizing line. Downstream of the coating section 20 is placed an annealing section after galvanization. The strip 1 from the annealing furnace is immersed in the zinc bath 2. The running direction of the strip is indicated by the arrow 13. At the outlet of the zinc bath, the strip rises vertically in the galvanizing tower. It passes through a wringer 3 which will allow to keep on the tape that the required coating thickness before entering the annealing section after galvanizing.
    [0003] The strip initially passes through the heater 4 equipped with a longitudinal flux inductor 5 which will allow to bring the strip to the temperature required for the annealing after galvanizing. It then passes through the holding unit 6 equipped with electrical resistors 7. The strip is then cooled in air by successive cooling ducts 8 and then with water in a water tank 9.
    [0004] Figure 2 schematically illustrates the magnetic flux that results from a longitudinal flux inductor. This flow is tangent to the strip surface 1. FIG. 3 schematically illustrates the magnetic flux 11 which results from a transverse flux inductor 12. This inductor consists of a pair of coils 12a, 12b. The flow is directed perpendicular to the surface of the strip 1.
    [0005] Figure 4 shows schematically an embodiment of an induction heating apparatus 14 according to the invention. This apparatus comprises a transverse flow inductor 15 comprising two pairs of coils 16a, 16b successive in the running direction of the strip. A pair consists of the coils placed on each side of the strip 1. The coils are held by supports 17.
    [0006] Figure 5 more explicitly illustrates the positioning of the removable screens 18a, 18, with respect to the band 1, the coils 16 and the support plates 17. The apparatus also comprises screens 18 placed on either side of the banks 19 of the bandaged. These screens are removable laterally in the tape travel direction 13 so as to influence the transverse temperature profile of the strip. By lateral adjustment it is necessary to understand a rapprochement or removal of two screens 18a, 18b placed on the two opposite banks 19 of the strip. Adjusting the position of the screens allows the banks to be overheated to compensate for edge effects that lead to greater bank cooling. According to an alternative embodiment of the invention, the screens 18 are also removable transversely to adjust their spacing relative to the band. This additional adjustment allows for further adjustment of the heater.10
    权利要求:
    Claims (7)
    [0001]
    REVENDICATIONS1. An induction heating apparatus (14) for heating a non-magnetic metal strip (1) in circulation in a continuous treatment line comprising a coating section (20), the apparatus being located downstream of said coating section in the running direction of the strip, the apparatus for raising the temperature of the strip to the level required to obtain the desired change in its coating, characterized in that the heater comprises at least one flux inductor (15) transverse.
    [0002]
    2. Apparatus according to claim 1 comprising screens (18) laterally movable in the running direction of the strip so as to influence the transverse temperature profile of the strip, characterized in that an adjustment of the position of the screens allows to adjust an overheating of the banks (19) of the band.
    [0003]
    3. Apparatus according to claim 1, characterized in that the transverse flux inductor (15) comprises at least two pairs of coils (16).
    [0004]
    An induction heating method for heating a non-magnetic metal strip (1) in circulation in a continuous treatment line downstream of a coating section (20) in the running direction of the strip, the temperature of the strip being raised to the level required to achieve the desired change in its coating, characterized in that the heating of the strip is achieved by means of a transverse flux inductor (15).
    [0005]
    5. Method according to claim 4, characterized in that the coating section allows dipping galvanization and in that the heating according to the invention allows to anneal after galvanization.
    [0006]
    6. Method according to claim 4, characterized in that the banks of the strip are superheated by the transverse flux inductor.
    [0007]
    7. A method according to claim 6, characterized in that the overheating of the banks of the band makes it possible to compensate for the additional cooling thereof which results from the edge effect.
    类似技术:
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    同族专利:
    公开号 | 公开日
    US20170002438A1|2017-01-05|
    CN105829569A|2016-08-03|
    FR3014449B1|2020-12-04|
    WO2015083141A1|2015-06-11|
    JP2017508864A|2017-03-30|
    JP6525339B2|2019-06-05|
    TR201905763T4|2019-05-21|
    KR20160098281A|2016-08-18|
    EP3077562A1|2016-10-12|
    EP3077562B1|2019-03-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2182230A|1985-10-25|1987-05-07|Nippon Light Metal Co|Electromagnetic strip induction heating|
    EP0308182A1|1987-09-15|1989-03-22|Electricity Association Services Limited|Induction heating apparatus|
    EP1148762A1|2000-04-19|2001-10-24|Celes|Induction heating device having transverse flux and variable width inductor|
    FR2887737A1|2005-06-24|2006-12-29|Celes Sa|INDUCTION OVEN FOR PROCESSING BANDS, SHEETS, PLATES, IN ELECTRICITY CONDUCTIVE MATERIAL, AND INDUCER FOR SUCH A FURNACE|
    WO2010011987A2|2008-07-25|2010-01-28|Inductotherm Corp.|Electric induction edge heating of electrically conductive slabs|
    US2556223A|1947-05-28|1951-06-12|Westinghouse Electric Corp|Induction heating of flat metal by transverse flux|
    US4845332A|1987-09-16|1989-07-04|National Steel Corp.|Galvanneal induction furnace temperature control system|
    JPH01232685A|1988-03-11|1989-09-18|Mitsubishi Heavy Ind Ltd|Induction heating device for steel plate|
    JPH0269959U|1988-11-16|1990-05-28|
    US5156683A|1990-04-26|1992-10-20|Ajax Magnethermic Corporation|Apparatus for magnetic induction edge heaters with frequency modulation|
    JPH05156420A|1991-12-06|1993-06-22|Sumitomo Metal Ind Ltd|Heating method and heater for metallic strip|
    JP2903449B2|1992-09-08|1999-06-07|日本アジャックス・マグネサーミック株式会社|Induction heating alloying furnace in hot-dip galvanizing equipment.|
    BE1007793A6|1993-12-24|1995-10-24|Centre Rech Metallurgique|Method and installation for continuous strip steel galvanized.|
    GB9503390D0|1995-02-21|1995-04-12|Davy Mckee Poole|"Variable-width induction heater|
    CA2190410C|1995-12-06|2000-04-25|Mitrajyoti Deka|Method and apparatus for controlling galvanneal induction furnace operation|
    JP2002198162A|2000-12-25|2002-07-12|Sumitomo Heavy Ind Ltd|Induction heater|
    US6576878B2|2001-01-03|2003-06-10|Inductotherm Corp.|Transverse flux induction heating apparatus|
    US6963056B1|2003-05-09|2005-11-08|Inductotherm Corp.|Induction heating of a workpiece|
    JP2006294396A|2005-04-11|2006-10-26|Shimada Phys & Chem Ind Co Ltd|Induction heating device|
    KR100742833B1|2005-12-24|2007-07-25|주식회사 포스코|High Mn Steel Sheet for High Corrosion Resistance and Method of Manufacturing Galvanizing the Steel Sheet|
    EP2008499A2|2006-03-29|2008-12-31|Inductotherm Corp.|Transverse flux induction heating apparatus and compensators|
    EP1878811A1|2006-07-11|2008-01-16|ARCELOR France|Process for manufacturing iron-carbon-manganese austenitic steel sheet with excellent resistance to delayed cracking, and sheet thus produced|
    EP3852493A1|2008-04-14|2021-07-21|Inductotherm Corp.|Variable width transverse flux electric induction coils|
    RU2518175C2|2010-02-19|2014-06-10|Ниппон Стил Корпорейшн|Device for induction heating by cross flow|
    KR101253834B1|2010-10-25|2013-04-12|주식회사 포스코|Method for Manufacturing Galvannealed Steel Sheet with Low Permeability|
    JP5403042B2|2011-12-05|2014-01-29|Ｊｆｅスチール株式会社|Alloying treatment apparatus and alloying control method for hot dip galvanized steel sheet|JP2018048387A|2016-09-23|2018-03-29|新日鐵住金株式会社|Continuous molten zinc plating method, and continuous molten zinc plating apparatus|
    JP6763261B2|2016-09-23|2020-09-30|日本製鉄株式会社|Continuous hot-dip galvanized steel sheet and manufacturing method of alloyed hot-dip galvanized steel sheet|
    JP6812999B2|2018-03-30|2021-01-13|Ｊｆｅスチール株式会社|Induction heating device for metal strips, manufacturing method for metal strips, and manufacturing method for alloyed hot-dip galvanized steel sheets|
    KR102352267B1|2020-10-20|2022-01-17|카토즈 주식회사|Device for preheating and heating thick steel for ship using induction heating|
    KR102357035B1|2020-10-20|2022-02-07|카토즈 주식회사|Method for preheating and heating thick steel for ship using induction heating|
    法律状态:
    2015-11-23| PLFP| Fee payment|Year of fee payment: 3 |
    2016-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 7 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 8 |
    2021-11-18| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1362272A|FR3014449B1|2013-12-06|2013-12-06|POST-GALVANIZING ANCURING SECTION CONTAINING A TRANSVERSE-FLOW INDUCER HEATING UNIT|FR1362272A| FR3014449B1|2013-12-06|2013-12-06|POST-GALVANIZING ANCURING SECTION CONTAINING A TRANSVERSE-FLOW INDUCER HEATING UNIT|
    CN201480066114.4A| CN105829569A|2013-12-06|2014-12-08|Continuous processing line for processing a non-magnetic metal strip including a galvannealing section and method for induction heating of said strip in said galvannealing section|
    TR2019/05763T| TR201905763T4|2013-12-06|2014-12-08|Continuous process line including a galvannealing section for a non-magnetic metal strip and method for induction heating of said strip in the galvannealing section.|
    KR1020167016664A| KR20160098281A|2013-12-06|2014-12-08|Continuous processing line for processing a non-magnetic metal strip including a galvannealing section and method for induction heating of said strip in said galvannealing section|
    JP2016536852A| JP6525339B2|2013-12-06|2014-12-08|Continuous processing line processing a nonmagnetic metal strip comprising a galvanic ring section, and a method of inductively heating the strip in the galvanic ring section|
    EP14830606.1A| EP3077562B1|2013-12-06|2014-12-08|Continuous processing line for processing a non-magnetic metal strip including a galvannealing section and method for induction heating of said strip in said galvannealing section|
    PCT/IB2014/066694| WO2015083141A1|2013-12-06|2014-12-08|Continuous processing line for processing a non-magnetic metal strip including a galvannealing section and method for induction heating of said strip in said galvannealing section|
    US15/101,536| US20170002438A1|2013-12-06|2014-12-08|Continuous processing line for processing a non-magnetic metal strip including a galvannealing section and method for induction heating of said strip in said galvannealing section|
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