EP0162989B1 - Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face - Google Patents

Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face Download PDF

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Publication number
EP0162989B1
EP0162989B1 EP84401121A EP84401121A EP0162989B1 EP 0162989 B1 EP0162989 B1 EP 0162989B1 EP 84401121 A EP84401121 A EP 84401121A EP 84401121 A EP84401121 A EP 84401121A EP 0162989 B1 EP0162989 B1 EP 0162989B1
Authority
EP
European Patent Office
Prior art keywords
strip
brush
zinc
coating
brushing
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
Application number
EP84401121A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0162989A1 (fr
Inventor
Robert Haaser
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.)
USINOR SA
Original Assignee
Union Siderurgique du Nord et de lEst de France SA USINOR
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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8192890&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0162989(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical Union Siderurgique du Nord et de lEst de France SA USINOR
Priority to AT84401121T priority Critical patent/ATE33043T1/de
Priority to DE8484401121T priority patent/DE3469917D1/de
Priority to EP84401121A priority patent/EP0162989B1/fr
Priority to SU3899255A priority patent/SU1389685A3/ru
Priority to US06/739,080 priority patent/US4594272A/en
Priority to CS385585A priority patent/CS273605B2/cs
Priority to BR8502567A priority patent/BR8502567A/pt
Priority to CA000482663A priority patent/CA1225550A/en
Priority to MX205430A priority patent/MX162647A/es
Priority to AU43152/85A priority patent/AU575650B2/en
Priority to ES544304A priority patent/ES8609503A1/es
Priority to KR1019850003769A priority patent/KR900000299B1/ko
Publication of EP0162989A1 publication Critical patent/EP0162989A1/fr
Priority to ES1986292492U priority patent/ES292492Y/es
Publication of EP0162989B1 publication Critical patent/EP0162989B1/fr
Application granted granted Critical
Expired legal-status Critical Current

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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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium 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
    • 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
    • C23C2/22—Removing excess of molten coatings; Controlling or regulating the coating thickness by rubbing, e.g. using knives, e.g. rubbing solids

Definitions

  • This invantion relates to the manufacture of galvanized steel sheets or strips, in particular stampable.
  • the present invention seeks to remedy this drawback by improving the ease of operation of the installation for industrial implementation of the process, which also results in an improvement in the quality of the product and in its profitability taking into account the reduced losses for adjustment for each production campaign.
  • the present invention thus relates to a method of manufacturing a strip of hot-dip galvanized steel sheet free of coating of pure Zn or based on Zn on at least one face, in which the strip is passed continuously through a conventional dip galvanizing bath, part of the coating of liquid Zn deposited on the strip is wiped by pneumatic means, at least one side of this strip is subjected to mechanical action in order to completely remove the coating based on non-Zn alloyed with iron, leaving only a thin layer of iron-zinc alloy, and the zinc particles removed from the brushed surface of the strip are recovered, characterized in that this mechanical action is exerted on the layer of zinc-based coating at a fixed level where the zinc is still liquid, using a brush, at least the bristles of which are subjected to cooling by a gas stream under forced circulation.
  • Zn coating or Zn coating is used for simplicity to denote a coating deposited from a dip galvanizing bath which may contain other metals such as, for example, aluminum in varying proportions over a wide range.
  • An originality of the present invention therefore lies in the fact that the zinc coating is brushed in the liquid state.
  • it is essential to sufficiently cool the bristles in order to cause solidification of the liquid zinc in contact with the bristles of the brush, all the more so when the quantity of Zn to be eliminated is greater and the temperature of the latter higher.
  • the improvement provided by the invention makes it possible to overcome the relatively critical adjustment of the brushing height, which is of considerable interest taking into account the variations in running speed that a galvanizing line can undergo in operation. Furthermore, when changing parameters such as the thickness of the strip, it is also not required to determine the brushing area in a relatively precise manner and thus to vary the height of the brushing device in a vertical plane above the surface of the zinc bath.
  • this advantage results in the fact that no device for adjusting the height of the brush, relative to the surface of the zinc bath, is necessary and that the latter can therefore be maintained at a predetermined fixed level in a horizontal plane.
  • the invention proceeds however from the same inventive concept as for European patent n ° 0 011 547 of which it is an improvement, because to obtain the expected result, namely the elimination of the coating of unalloyed Zn, it is necessary, if the brush a layer of liquid zinc, to cool the bristles of the brush vigorously, which causes by heat exchange with the cold bristles of the brush which come into contact with an elementary zone of zinc surrounding the end of the bristle passage of this coating of unalloyed zinc in its transient liquid-solid state characterized by its great friability.
  • the metallic bristles of the brush are vigorously cooled by placing this brush in a forced gas stream, which in practice is air.
  • the forced gas stream has a dual function of cooling the bristles of the bros and solidifying the droplets of liquid Zn possibly projected during brushing in the form of solid particles.
  • the hollow shaft of the brush is conventionally cooled by circulation of a cooling fluid.
  • the invention also relates to a brushing device for implementing the method, comprising a support located along the path of the strip above the surface of the zinc bath and carrying a rotary cylindrical brush, placed in a casing and the end of the bristles of which is in contact with the surface of the strip opposite which it is placed, and at least one counter roller bearing in contact with the opposite face of the strip, characterized in that the arter extends well in the direction perpendicular to the axis of the strip relative to the edges of the latter and comprises two zones separated by a wall extending to the vicinity of the lower generatrix of the brush, the first zone which surrounds most of the external surface of the brush and which is in a position opposite the strip with respect to the brush, cooperating with means of forced circulation of a gaseous flow of cooling and the second zone, located opposite the strip and below the brush, being provided with means for recovering dust or particles of zinc which are eliminated from the brushed surface of the strip.
  • the second zone preferably comprises inclined flaps channeling the particles of solidified zinc towards a discharge conduit connected to a hopper for recovering the finely divided particles of solidified zinc.
  • the device comprises, opposite the face opposite to the brushing face, vertical deflectors delimiting vertical baffles channeling the gas flow and preventing redeposition on the face comprising the zinc coating, particles generated by the brushing.
  • these vertical deflectors are placed so that they surround the support roller over a large part of its periphery.
  • these deflectors are cut in a substantially central zone by a wall in the form of an inclined plane directed towards the strip, opening into a gutter for collecting dust or Zn particles.
  • Figure 1 a conventional dip galvanizing installation comprising a bath 1 of molten zinc into which penetrates a strip 2 of sheet steel from a furnace not shown, and circulating in a channel 3 under a protective atmosphere.
  • This strip is returned by a roller 4 at the bottom of the tank and leaves the zinc bath vertically, being wiped by a pneumatic device 5 located in the vicinity of the surface of the zinc bath.
  • the strip continues its path vertically as indicated by arrow 6 after having passed through the zinc coating brushing device according to the present invention.
  • This device comprises a support 8 movable in translation in a horizontal plane and parallel to the plane of the strip, for example on rails 9.
  • a brush 10 is integral with this support and driven in rotation, by means not shown thanks to a motor 11 mounted on the support.
  • the hub 10a of this brush is preferably hollow and traversed by a cooling fluid.
  • a counter-roller 12 placed opposite the face of the strip opposite to brushing provides support for the strip which it pushes back in the direction of the bristles of the brush so that the plane of the strip is slightly secant to the envelope of the end of the bristles of the brush 10.
  • the brush 10 is housed in a casing 13 described below in detail in FIG. 2.
  • This casing 13 is connected on the one hand to a circuit 14 for forced circulation of a brush cooling gas opening into a hopper 15, the circuit is put into suction by a blower 16.
  • the casing 13 is connected on the other hand to a circuit 17 for dust extraction, opening into a hopper 18 and equipped with another blower 19.
  • the two circuits 14 and 17 are thus put into suction to limit as much as possible the release and circulation of dust.
  • the casing enveloping the brush 10 comprises a baffle 20 for entering the stream of cooling gas in forced circulation by suction. It is moreover separated into two distinct zones by a wall 21 whose upper edge 21? is arranged in the vicinity of the lower generator of the brush 10.
  • This zone 22 flows the stream of cooling gas from the brush.
  • This zone of forced circulation surrounds the major part of the external surface of the cylindrical brush so as to ensure its most effective cooling and is located in a position opposite to the strip 2 relative to the brush 10.
  • This zone of forced circulation cooling gas opens into a box 23, connected to the cooling gas suction circuit 14.
  • the second zone 24, separated in an almost leaktight manner from the zone 22 by the wall 21, at least as regards the zinc particles generated by brushing, is located opposite the face of the strip comprising a coating of liquid zinc which will be brushed by brush 10.
  • This zone 24 comprises deflector flaps 25, 26, 27, in the form of inclined planes and which channel the solidified zinc particles ejected towards the base of the casing 13 where they are recovered by suction by the pipe 29 connected to the suction circuit 17 zinc dust.
  • These flaps are preferably orientable around horizontal axes and extend through slots 138 of the casing.
  • Deflectors 30a, 30b regularly spaced and surrounding the support roller 12 over a large part of its periphery are placed vertically, as appears in Figure 3, so as to vertically channel the existing gas stream on the face of the opposite strip brushing. These vertical deflectors 30 q , 30b form vertical baffles preventing the possible redeposition of the zinc dust generated by brushing the opposite face and which could adversely affect the face with the conventional zinc coating.
  • Vertical baffles 30 a, 30b are separated in a substantially central region by a wall 31 in the form of an inclined plane, directed towards the web 2 and perpendicular to the deflectors.
  • This inclined plane opens out along its lower edge into a gutter 32 with which it delimits a slope 315 of relatively small width and which is connected to the circuit 14 for circulation of the cooling gas of the brush ( Figures 2 and 3).
  • the deflectors 30b, located below the wall 31 are arranged, preferably in two groups located in the vicinity of the edges of the sheet, and separated by a central area 33, ( Figure 4).
  • the gas circulation current induced around the strip 2 on the opposite face of the backing roller 12 is partitioned and channeled as indicated by the arrows so as to effectively prevent the possible redeposition of the zinc particles generated by brushing, beyond the edges on the face with classic zinc coating.

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)
  • Electroplating Methods And Accessories (AREA)
  • Nonmetallic Welding Materials (AREA)
EP84401121A 1984-05-30 1984-05-30 Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face Expired EP0162989B1 (fr)

Priority Applications (13)

Application Number Priority Date Filing Date Title
AT84401121T ATE33043T1 (de) 1984-05-30 1984-05-30 Verfahren und vorrichtung zum herstellen eines mindestens einseitig verzinkten blechs oder bandes.
DE8484401121T DE3469917D1 (en) 1984-05-30 1984-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface
EP84401121A EP0162989B1 (fr) 1984-05-30 1984-05-30 Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face
BR8502567A BR8502567A (pt) 1984-05-30 1985-05-29 Processo de fabricacao de uma cinta de chapa de aco galvanizado a quente isenta de revestimento de zinco puro ou a base de zinco em pelo menos uma face e dispositivo de escovar para aplicacao do processo
US06/739,080 US4594272A (en) 1984-05-30 1985-05-29 Process and device for manufacturing sheet metal or galvanized steel strip devoid of a pure zinc coating on at least one side
CS385585A CS273605B2 (en) 1984-05-30 1985-05-29 Method of galvanized steel band production,free from zinc coating at least on one side, and equipment for realization of this method
SU3899255A SU1389685A3 (ru) 1984-05-30 1985-05-29 Устройство дл изготовлени ленты из гор чей оцинкованной стали
CA000482663A CA1225550A (en) 1984-05-30 1985-05-29 Process and device for manufacturing sheet metal or galvanized steel strip devoid of pure zinc coating on at least on side
MX205430A MX162647A (es) 1984-05-30 1985-05-29 Procedimiento y dispositivo perfeccionados para la fabricacion de chapa o banda de acero galvanizada exenta de revestimiento de zinc en al menos una de sus caras
ES544304A ES8609503A1 (es) 1984-05-30 1985-05-30 Procedimiento para la fabricacion de una banda de chapa de acero galvanizado exenta de revestimientos de cinc al menos en una de sus caras.
AU43152/85A AU575650B2 (en) 1984-05-30 1985-05-30 Galvanizing so that at least one side is devoid of a coating
KR1019850003769A KR900000299B1 (ko) 1984-05-30 1985-05-30 일측면에 순수아연코팅이 없는 금속시이트 또는 아연도금강철 스트립의 제조방법과 장치
ES1986292492U ES292492Y (es) 1984-05-30 1986-02-14 Dispositivo para la fabricacion de una banda de chapa de acero galvanizado exenta de revestimientos de cinc en al menos una de sus caras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84401121A EP0162989B1 (fr) 1984-05-30 1984-05-30 Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face

Publications (2)

Publication Number Publication Date
EP0162989A1 EP0162989A1 (fr) 1985-12-04
EP0162989B1 true EP0162989B1 (fr) 1988-03-16

Family

ID=8192890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401121A Expired EP0162989B1 (fr) 1984-05-30 1984-05-30 Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face

Country Status (12)

Country Link
US (1) US4594272A (cs)
EP (1) EP0162989B1 (cs)
KR (1) KR900000299B1 (cs)
AT (1) ATE33043T1 (cs)
AU (1) AU575650B2 (cs)
BR (1) BR8502567A (cs)
CA (1) CA1225550A (cs)
CS (1) CS273605B2 (cs)
DE (1) DE3469917D1 (cs)
ES (2) ES8609503A1 (cs)
MX (1) MX162647A (cs)
SU (1) SU1389685A3 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3396009B1 (en) * 2015-12-24 2024-02-07 POSCO Co., Ltd Plated steel sheet having fine and even plating structure and plated steel sheet manufacturing method

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162989B1 (fr) * 1984-05-30 1988-03-16 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face
ATE45390T1 (de) * 1986-06-12 1989-08-15 Duma Konstruktionsbuero Abblasvorrichtung zum kontinuierlichen beidseitigen beschichten von metallband.
CA1328166C (en) * 1988-09-29 1994-04-05 Hidekazu Kawano Two-fluid injection apparatus and a manufacturing apparatus including such injecting apparatus for manufacturing minimized spangle molten plated steel plate
KR20030014529A (ko) * 2001-08-11 2003-02-19 재단법인 포항산업과학연구원 조선용 형강의 아연도금 후처리 공정을 위한 도막제거 장치
DE102004059200B4 (de) * 2004-12-09 2010-12-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Kühlen von Substraten
DE102006050702A1 (de) * 2006-10-24 2008-04-30 Welser Profile Gmbh Vorrichtung und Verfahren zum Entfernen einer Metallbeschichtung
EP2028286A1 (de) * 2007-07-21 2009-02-25 Rasselstein GmbH Verfahren zur Entfernung einer überschüssigen Beschichtung an der Bandkante von galvanisch mit einer Metallbeschichtung beschichteten Stahlbändern
WO2009068700A1 (es) * 2007-11-26 2009-06-04 Alavesa De Trabajos Metalicos, S.L. Procedimiento y máquina para eliminar el exceso de metal en piezas galvanizadas
ES2526078T3 (es) * 2012-02-21 2015-01-05 Cockerill Maintenance & Ingenierie S.A. Sistema para reducir el consumo de gas de limpieza en una cuchilla de aire
CN105525246B (zh) * 2016-03-02 2017-12-01 江苏法尔胜泓昇集团有限公司 一种钢丝热镀锌抹锌用装置
CN105525247B (zh) * 2016-03-02 2017-12-08 江苏法尔胜泓昇集团有限公司 一种钢丝热镀锌抹锌方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933401A (en) * 1929-10-01 1933-10-31 Youngstown Sheet And Tube Co Coated metal article and manufacture thereof
DE732591C (de) * 1937-12-28 1943-03-06 Matthias Leuchter Verfahren zur Oberflaechenveredelung von Schmiedeeisen, insbesondere kunstgewerblichen Schmiedearbeiten
FR1279624A (fr) * 1960-12-26 1961-12-22 Armco Steel Corp Procédé d'obtention de tôles ou feuillards présentant des revêtements latérauxdifférents
US3260577A (en) * 1961-12-20 1966-07-12 Nat Steel Corp Coated product and its manufacture
US3383189A (en) * 1964-04-16 1968-05-14 Sendzimir Inc T Prevention of white rust on galvanized sheets
US4071643A (en) * 1973-01-24 1978-01-31 The Glacier Metal Company Limited Method of manufacturing bearing material
US4120997A (en) * 1976-05-11 1978-10-17 Inland Steel Company Process for producing one-side galvanized sheet material
GB1602732A (en) * 1978-04-28 1981-11-18 British Steel Corp Removal of excess liquid coatant from strip
CA1132011A (en) * 1978-11-09 1982-09-21 Bernard Schoeps Process and apparatus for producing a sheet or strip which is lightly galvanized on one or both sides and products obtained by said process
EP0162989B1 (fr) * 1984-05-30 1988-03-16 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3396009B1 (en) * 2015-12-24 2024-02-07 POSCO Co., Ltd Plated steel sheet having fine and even plating structure and plated steel sheet manufacturing method

Also Published As

Publication number Publication date
SU1389685A3 (ru) 1988-04-15
CS385585A2 (en) 1990-08-14
DE3469917D1 (en) 1988-04-21
BR8502567A (pt) 1986-02-04
ES292492Y (es) 1987-02-16
CS273605B2 (en) 1991-03-12
US4594272A (en) 1986-06-10
AU575650B2 (en) 1988-08-04
ES544304A0 (es) 1986-09-01
KR850007985A (ko) 1985-12-11
EP0162989A1 (fr) 1985-12-04
MX162647A (es) 1991-06-10
CA1225550A (en) 1987-08-18
ATE33043T1 (de) 1988-04-15
KR900000299B1 (ko) 1990-01-25
AU4315285A (en) 1985-12-05
ES8609503A1 (es) 1986-09-01
ES292492U (es) 1986-06-01

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