EP1483423B1 - Vorrichtung zur schmelztauchbeschichtung von metallsträngen - Google Patents

Vorrichtung zur schmelztauchbeschichtung von metallsträngen Download PDF

Info

Publication number: EP1483423B1
Authority: EP; European Patent Office
Prior art keywords: guide channel; metal; inductor; electromagnetic; coating
Prior art date: 2002-03-09
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

Application number

EP03743810A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP1483423A1 (de

Inventor

Walter Trakowski

Olaf-Norman Jepsen

Eckart Schunk

Klaus Frommann

Rolf Brisberger

Holger Behrens

Michael Zielenbach

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

SMS Siemag AG

Original Assignee

SMS Demag AG

Priority date (The priority date 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 date listed.)

2002-03-09

Filing date

2003-02-20

Publication date

2006-06-14

2003-02-20 Application filed by SMS Demag AG filed Critical SMS Demag AG

2004-12-08 Publication of EP1483423A1 publication Critical patent/EP1483423A1/de

2006-06-14 Application granted granted Critical

2006-06-14 Publication of EP1483423B1 publication Critical patent/EP1483423B1/de

2023-02-20 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

239000002184 metal Substances 0.000 title claims abstract description 76
238000003618 dip coating Methods 0.000 title claims abstract description 10
238000000576 coating method Methods 0.000 claims abstract description 44
239000011248 coating agent Substances 0.000 claims abstract description 43
230000006698 induction Effects 0.000 claims abstract description 24
229910000831 Steel Inorganic materials 0.000 claims abstract description 10
239000010959 steel Substances 0.000 claims abstract description 10
230000000903 blocking effect Effects 0.000 claims abstract description 7
238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
230000033228 biological regulation Effects 0.000 claims description 3
230000003993 interaction Effects 0.000 claims description 2
230000014759 maintenance of location Effects 0.000 claims description 2
238000010438 heat treatment Methods 0.000 abstract description 7
230000005294 ferromagnetic effect Effects 0.000 description 7
239000007788 liquid Substances 0.000 description 7
238000000034 method Methods 0.000 description 5
230000005291 magnetic effect Effects 0.000 description 4
230000007423 decrease Effects 0.000 description 3
230000000694 effects Effects 0.000 description 3
229910045601 alloy Inorganic materials 0.000 description 2
239000000956 alloy Substances 0.000 description 2
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
230000001939 inductive effect Effects 0.000 description 2
229910052760 oxygen Inorganic materials 0.000 description 2
239000001301 oxygen Substances 0.000 description 2
230000001105 regulatory effect Effects 0.000 description 2
238000007789 sealing Methods 0.000 description 2
230000004913 activation Effects 0.000 description 1
238000005275 alloying Methods 0.000 description 1
230000004888 barrier function Effects 0.000 description 1
241001233037 catfish Species 0.000 description 1
238000004891 communication Methods 0.000 description 1
238000010276 construction Methods 0.000 description 1
238000001816 cooling Methods 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
230000009189 diving Effects 0.000 description 1
230000005672 electromagnetic field Effects 0.000 description 1
230000005307 ferromagnetism Effects 0.000 description 1
230000005484 gravity Effects 0.000 description 1
239000000411 inducer Substances 0.000 description 1
238000003780 insertion Methods 0.000 description 1
230000037431 insertion Effects 0.000 description 1
229910001338 liquidmetal Inorganic materials 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000000463 material Substances 0.000 description 1
238000005086 pumping Methods 0.000 description 1
238000007711 solidification Methods 0.000 description 1
230000008023 solidification Effects 0.000 description 1

Images

Classifications

- 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

Definitions

the invention relates to a device for hot dip coating of metal strands, in particular of steel strip, in which the metal strand can be passed vertically through a molten coating metal receiving container and through an upstream guide channel, wherein in the region of the guide channel an electromagnetic inductor is arranged, which is for retaining the coating metal can induce induction currents in the container by means of an electromagnetic barrier field in the coating metal, which exert an electromagnetic force in interaction with the electromagnetic blocking field.
the belts are introduced from above into the dip-coating bath in a plunger. Since the coating metal in liquid Form present and you want to use the gravity together with blowers for adjusting the coating thickness, the subsequent processes, however, prohibit band contact until complete solidification of the coating metal, the tape must be deflected in the coating vessel in the vertical direction. This happens with a roller that runs in liquid metal. Due to the liquid coating metal, this roller is subject to heavy wear and is the cause of downtimes and thus failures in production.
the known dip coating systems also have limit values in the coating speed. These are the limit values for the operation of the wiping nozzle, the cooling processes of the continuous metal strip and the heating process for setting alloy layers in the coating metal. This leads to the case that on the one hand, the maximum speed is generally limited and on the other certain metal bands can not be driven at the maximum speed possible for the system.
non-ferromagnetic metal bands are thus possible, but occur in substantially ferromagnetic steel strips so that they are drawn in the electromagnetic seals by the ferromagnetism to the channel walls, whereby the tape surface is damaged. Furthermore, it is problematic that the coating metal is heated by the inductive fields inadmissible.
the position of the passing ferromagnetic steel strip through the guide channel between two traveling field inductors is an unstable equilibrium. Only in the middle of the guide channel is the sum of the magnetic forces of attraction acting on the tape zero. As soon as the steel strip is deflected out of its center position, it gets closer to one of the both inductors as it moves away from the other inductor. Causes of such a deflection may be simple flatness errors of the tape.
any kind of tape waves in running direction, seen across the width of the tape Centerbuckles, Quarterbuckles, Randwellen, Flattem, twisting, Crossbow, S-shape, etc.
the magnetic induction which is responsible for the magnetic attraction decreases according to an exponential function with the distance from the inductor in their field strength.
the attraction force decreases with the square of the induction field strength with increasing distance from the inductor. For the deflected band, this means that with the deflection in one direction, the attractive force to one inductor expands exponentially, while the restoring force from the other inductor exponentially decreases. Both effects are self-reinforcing, so the balance is unstable.
DE 195 35 854 A1 and DE 100 14 867 A1 give hints.
additional correction coils are provided in addition to the coils for generating the electromagnetic traveling field, which are in communication with a control system and ensure that the metal strip is retrieved when departing from the central position in this.
the invention is therefore based on the object, a device for hot dip coating of metal strands of the type mentioned in such a way that the mentioned disadvantages are overcome. It should therefore be designed in particular an electromagnetic inductor, which has a low overall height and still does not cause strong heating of the metal strand
the inductor is connected to electrical supply means which supply it with an alternating current whose frequency is less than 500 Hz, the supply means supplying the inductor with single-phase alternating current and wherein the
Device comprises guide means for guiding the metal strand in the guide channel, which consist of at least two correction coils for position control of the metal strand in the guide channel in the direction normal to the surface of the metal strand; It is preferably provided that the frequency is less than 100 Hz, in particular 50 Hz (mains frequency).
the inductor on each an induction coil on both sides of the guide channel is provided.
the guide means for guiding the metal strand in the guide channel may further be at least one pair of guide rollers. These are preferably arranged in the lower region of the guide channel or below the guide channel.
the correction coils can, viewed in the direction of movement of the metal strand. At the same height as the induction coils are arranged.
a good efficiency of the inductor results when the electromagnetic inductor for receiving the induction coil and the correction coil has two grooves which are parallel to each other, perpendicular to the direction of movement of the metal strand and perpendicular to the normal direction.
the regulation of the metal strand in the Guide channel facilitates when the correction coil arranged in the grooves is arranged closer to the metal strand than the induction coil. The regulation can be carried out more accurately if the inductor has on both sides of the metal strand at least two correction coils arranged next to one another in a row.
means may be provided for supplying the correction coils with an alternating current which has the same phase as the current with which the induction coils are operated.
the position of the continuous steel strip can be detected by inductive field sensors which are operated with a weak measuring field of high frequency.
inductive field sensors which are operated with a weak measuring field of high frequency.
a higher-frequency voltage with low power is superimposed on the induction coils.
the higher frequency voltage has no influence on the seal; In the same catfish, this does not result in any heating of the coating metal or steel strip.
the higher-frequency induction can be filtered out of the strong signal of the normal seal and then provides a signal proportional to the distance from the sensor. With this, the position of the belt in the guide channel can be detected and regulated.
FIG. 1 shows the principle of hot-dip coating of a metal strand 1, in particular a steel strip.
the metal strand to be coated 1 enters vertically from below into the guide channel 4 of the coating system.
the guide channel 4 forms the lower end of a container 3, which is filled with liquid coating metal 2.
the metal strand 1 is guided vertically upward in the direction of movement X. So that the liquid coating metal 2 can not leak from the container 3, an electromagnetic inductor 5 is arranged in the region of the guide channel 4. This consists of two halves 5a and 5b, one of which is arranged laterally of the metal strand 1. In the electromagnetic inductor 5, an electromagnetic blocking field is generated which retains the liquid coating metal 2 in the container 3 and thus prevents it from leaking.
the inductor 5 is supplied by an electrical supply means 6 with single-phase alternating current.
the frequency f of the alternating current is less than 500 Hz.
mains frequency ie 50 or 60 Hz, is used.
the more detailed structure of the region of the guide channel 4 can be seen in FIG.
the inductor 5 (or its two halves 5a and 5b) has grooves 9, in which an induction coil 7 is inserted, which is supplied with the alternating current and thus generates the electromagnetic blocking field. Care should be taken in particular to ensure that the metal strand 1 is guided in the direction N normally on the strand 1 as centrally as possible in the guide channel 4.
guide means 8 are provided, which are formed in FIG. 2 as guide rollers 8a. These are arranged under the guide channel 4 and ensure that a central insertion of the metal strand 1 takes place in the guide channel 4.
the guide means 8 it is also possible to form the guide means 8 in other ways.
electrical correction coils 8 b are provided which generate a regulated magnetic field and thus the metal strand 1 in the middle of the guide channel 4.
both the induction coils 7 and the correction coils 8b are positioned in the grooves 9 of the inductor 5a, 5b at the same height, as viewed in the direction of movement X.
Fig. 4 the side view is sketched on one of the two Induktorhdonn 5b.
both the induction coil 7 and the correction coil 8b are accommodated in the grooves 9 of the inductor 5b.
three correction coils 8b ', 8b "and 8b" arranged side by side are provided, which act on the width of the metal rod 1 and can thus hold it centrally in the guide channel 4.
the correction spurs 8b ', 8b “and 8b”' are driven with the same current phase present in the induction coil 7, in front of which the correction coils 8b ', 8b ", 8b”' are arranged.

Landscapes

Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Coating With Molten Metal (AREA)
General Induction Heating (AREA)
Glass Compositions (AREA)

EP03743810A 2002-03-09 2003-02-20 Vorrichtung zur schmelztauchbeschichtung von metallsträngen Expired - Lifetime EP1483423B1 (de)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
DE10210430		2002-03-09
DE10210430A DE10210430A1 (de)	2002-03-09	2002-03-09	Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen
PCT/EP2003/001701 WO2003076680A1 (de)	2002-03-09	2003-02-20	Vorrichtung zur schmelztauchbeschichtung von metallsträngen

Publications (2)

Publication Number	Publication Date
EP1483423A1 EP1483423A1 (de)	2004-12-08
EP1483423B1 true EP1483423B1 (de)	2006-06-14

Family

ID=27762824

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP03743810A Expired - Lifetime EP1483423B1 (de)	2002-03-09	2003-02-20	Vorrichtung zur schmelztauchbeschichtung von metallsträngen

Country Status (15)

Country	Link
US (1)	US7361224B2 (ru)
EP (1)	EP1483423B1 (ru)
JP (1)	JP3973628B2 (ru)
KR (1)	KR100941624B1 (ru)
CN (1)	CN100374611C (ru)
AT (1)	ATE330041T1 (ru)
AU (1)	AU2003210316B2 (ru)
BR (1)	BR0307794A (ru)
CA (1)	CA2478487C (ru)
DE (2)	DE10210430A1 (ru)
ES (1)	ES2266840T3 (ru)
MX (1)	MXPA04008696A (ru)
PL (1)	PL202721B1 (ru)
RU (1)	RU2313617C2 (ru)
WO (1)	WO2003076680A1 (ru)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10255995A1 (de) *	2002-11-30	2004-06-09	Sms Demag Ag	Vorrichtung und Verfahren zur Schmelztauchbeschichtung eines Metallstranges
PL376865A1 (pl) *	2003-02-27	2006-01-09	Sms Demag Aktiengesellschaft	Sposób i urządzenie do zanurzeniowego powlekania taśm metalowych, zwłaszcza taśm stalowych
DE10312939A1 (de) *	2003-02-27	2004-09-09	Sms Demag Ag	Verfahren und Einrichtung zum Schmelztauch-Beschichten von Metallbändern, insbesondere von Stahlbändern
SE527507C2 (sv) *	2004-07-13	2006-03-28	Abb Ab	En anordning och ett förfarande för stabilisering av ett metalliskt föremål samt en användning av anordningen
DE102005030766A1 (de) *	2005-07-01	2007-01-04	Sms Demag Ag	Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges
US10439375B2 (en)	2014-04-14	2019-10-08	Halliburton Energy Services, Inc.	Wellbore line coating repair

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2316026A1 (fr) *	1975-07-04	1977-01-28	Anvar	Dispositif electromagnetique de confinement des metaux liquides
CH648500A5 (de) *	1980-07-11	1985-03-29	Concast Ag	Verfahren und vorrichtung zum stranggiessen von metall in einem geschlossenen eingiesssystem.
US4842170A (en) *	1987-07-06	1989-06-27	Westinghouse Electric Corp.	Liquid metal electromagnetic flow control device incorporating a pumping action
FR2647814B1 (fr) *	1989-06-02	1994-07-08	Galva Lorraine	Enceinte utilisable pour recouvrir d'un revetement a base de metal ou d'alliage metallique des objets de forme allongee defilant a travers elle
FR2700555B1 (fr) *	1993-01-20	1995-03-31	Delot Process Sa	Procédé de dimensionnement d'une enceinte de galvanisation pourvue d'un dispositif d'essuyage magnétique de produits métallurgiques galvanisés.
DE4344939C1 (de) *	1993-12-23	1995-02-09	Mannesmann Ag	Verfahren zum prozeßgerechten Regeln einer Anlage zum Beschichten von bandförmigem Gut
US5464667A (en) *	1994-08-16	1995-11-07	Minnesota Mining And Manufacturing Company	Jet plasma process and apparatus
US6106620A (en) *	1995-07-26	2000-08-22	Bhp Steel (Jla) Pty Ltd.	Electro-magnetic plugging means for hot dip coating pot
DE19535854C2 (de) *	1995-09-18	1997-12-11	Mannesmann Ag	Verfahren zur Bandstabilisierung in einer Anlage zum Beschichten von bandförmigem Gut
US5765730A (en) *	1996-01-29	1998-06-16	American Iron And Steel Institute	Electromagnetic valve for controlling the flow of molten, magnetic material
JPH1046311A (ja) *	1996-07-26	1998-02-17	Nisshin Steel Co Ltd	電磁シール機構を備えた溶融めっき装置
CA2225537C (en) *	1996-12-27	2001-05-15	Mitsubishi Heavy Industries, Ltd.	Hot dip coating apparatus and method
FR2797276A1 (fr) *	1999-08-05	2001-02-09	Lorraine Laminage	Dispositif et procede de controle du revetement en continu par immersion d'une bande metallique en defilement rectiligne vertical
DE10014867A1 (de) *	2000-03-24	2001-09-27	Sms Demag Ag	Verfahren und Einrichtung zum Schmelztauchbeschichten von Metallsträngen, insbesondere von Stahlband
DE10210429A1 (de) *	2002-03-09	2003-09-18	Sms Demag Ag	Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen

2002
- 2002-03-09 DE DE10210430A patent/DE10210430A1/de not_active Withdrawn
2003
- 2003-02-20 ES ES03743810T patent/ES2266840T3/es not_active Expired - Lifetime
- 2003-02-20 US US10/507,269 patent/US7361224B2/en not_active Expired - Fee Related
- 2003-02-20 RU RU2004129779/02A patent/RU2313617C2/ru not_active IP Right Cessation
- 2003-02-20 AT AT03743810T patent/ATE330041T1/de not_active IP Right Cessation
- 2003-02-20 MX MXPA04008696A patent/MXPA04008696A/es active IP Right Grant
- 2003-02-20 DE DE50303826T patent/DE50303826D1/de not_active Expired - Lifetime
- 2003-02-20 CA CA2478487A patent/CA2478487C/en not_active Expired - Fee Related
- 2003-02-20 KR KR1020047013929A patent/KR100941624B1/ko not_active IP Right Cessation
- 2003-02-20 PL PL371544A patent/PL202721B1/pl not_active IP Right Cessation
- 2003-02-20 EP EP03743810A patent/EP1483423B1/de not_active Expired - Lifetime
- 2003-02-20 AU AU2003210316A patent/AU2003210316B2/en not_active Ceased
- 2003-02-20 CN CNB038056186A patent/CN100374611C/zh not_active Expired - Fee Related
- 2003-02-20 WO PCT/EP2003/001701 patent/WO2003076680A1/de active IP Right Grant
- 2003-02-20 BR BR0307794-2A patent/BR0307794A/pt not_active Application Discontinuation
- 2003-02-20 JP JP2003574873A patent/JP3973628B2/ja not_active Expired - Fee Related

Also Published As

Publication number	Publication date
KR20040091109A (ko)	2004-10-27
EP1483423A1 (de)	2004-12-08
CA2478487A1 (en)	2003-09-18
MXPA04008696A (es)	2005-07-13
JP3973628B2 (ja)	2007-09-12
AU2003210316B2 (en)	2008-06-12
US20050172893A1 (en)	2005-08-11
CA2478487C (en)	2010-11-09
AU2003210316A1 (en)	2003-09-22
BR0307794A (pt)	2004-12-21
CN1639378A (zh)	2005-07-13
PL202721B1 (pl)	2009-07-31
RU2313617C2 (ru)	2007-12-27
DE50303826D1 (de)	2006-07-27
US7361224B2 (en)	2008-04-22
JP2005526180A (ja)	2005-09-02
KR100941624B1 (ko)	2010-02-11
WO2003076680A1 (de)	2003-09-18
RU2004129779A (ru)	2005-05-10
CN100374611C (zh)	2008-03-12
ATE330041T1 (de)	2006-07-15
ES2266840T3 (es)	2007-03-01
PL371544A1 (en)	2005-06-27
DE10210430A1 (de)	2003-09-18

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