WO1996038599A1 - Method and apparatus for coating a metal strip with a metal or alloy with a lower melting or liquidus point than the strip material - Google Patents
Method and apparatus for coating a metal strip with a metal or alloy with a lower melting or liquidus point than the strip material Download PDFInfo
- Publication number
- WO1996038599A1 WO1996038599A1 PCT/CH1996/000191 CH9600191W WO9638599A1 WO 1996038599 A1 WO1996038599 A1 WO 1996038599A1 CH 9600191 W CH9600191 W CH 9600191W WO 9638599 A1 WO9638599 A1 WO 9638599A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strip
- metal
- alloy
- enclosure
- coating
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title claims abstract description 50
- 238000000576 coating method Methods 0.000 title claims abstract description 39
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 29
- 239000000956 alloy Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 24
- 239000000463 material Substances 0.000 title claims description 11
- 230000008018 melting Effects 0.000 title claims description 6
- 238000002844 melting Methods 0.000 title claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 229910007570 Zn-Al Inorganic materials 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- 239000003870 refractory metal Substances 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 230000006698 induction Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- GQUAIKWWRYLALG-UHFFFAOYSA-N 4-formamido-n-[5-[[5-[3-[(9-methoxy-5,11-dimethyl-6h-pyrido[4,3-b]carbazol-1-yl)amino]propylcarbamoyl]-1-methylpyrrol-3-yl]carbamoyl]-1-methylpyrrol-3-yl]-1-methylpyrrole-2-carboxamide Chemical compound C=12C(C)=C3C4=CC(OC)=CC=C4NC3=C(C)C2=CC=NC=1NCCCNC(=O)C(N(C=1)C)=CC=1NC(=O)C(N(C=1)C)=CC=1NC(=O)C1=CC(NC=O)=CN1C GQUAIKWWRYLALG-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- C23C2/003—Apparatus
- C23C2/0036—Crucibles
- C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
- C23C2/00362—Details related to seals, e.g. magnetic means
Definitions
- the present invention relates to a method and a device for coating a metal strip with a metal or an alloy with a lower melting point or with liquidus than that of the material constituting the strip, according to which the strip is preheated and entrains it from bottom to top through a bath of said metal or of said alloy brought to a temperature higher than that of preheating the strip, then cools this strip at the outlet of said bath to a temperature lower than that of solidification of said metal or alloy.
- High speed wire coating methods have already been proposed which are passed from bottom to top through a bath of molten metal or alloy. Such methods are described, for example, in US-3,523,815, US-2,565,677, US-3,484,280 and US-4, 169,426.
- the strips are generally thin, ⁇ 1 mm thick and even ⁇ 0.5 mm, most often. Consequently, the edge of the strip, which, given its surface, develops the lowest driving force on the molten metal when moving this strip from bottom to top, is also the part of the strip which is in front of the largest mass of liquid, that is to say all the liquid metal located between the edge of the strip and the edge of the rectangular opening, taking into account the necessary clearance between this edge and this edge.
- the width of the opening will be between 0.7 and ⁇ 20 mm, that is to say a width between approximately 2 and 7 times the width of l edge, with a distance of 2 to 4 mm between the edge and the narrow edge of the rectangular opening, hence the difficulty in solving the problem of leaks.
- the problem of homogeneous heating of the strip is also more complex than that of heating a wire. This probably explains why this coating technique was essentially reserved for the wire, or, in the case of bands, to one side only, thus avoiding the problems linked to leaks at the edges of the band, mentioned above.
- the object of the present invention is precisely to propose a solution making it possible to extend the use of this method to a flat strip.
- the subject of the present invention is a process for coating a metal strip with a metal or an alloy with a lower melting point or with liquidus than that of the material constituting the strip, according to claim 1.
- One of the essential advantages of this process is to have a layer of liquid metal in contact with the strip having only a very small volume, of the order of 200 cl per meter of width of the strip.
- the coating of the strip therefore stops very quickly from the moment when the supply of the liquid metal layer which it passes through ceases. This makes it possible to obtain very great flexibility of use, to stop the installation, to change the coating metal or the strip without having large volumes of metal to be removed from the installation, as is the case. with conventional installations where the strip is immersed in a metal bath resulting in the immobilization of very large volumes of metal.
- Another advantage of the process according to the invention is that it allows to obtain homogeneous coatings having small thicknesses between 10-20 ⁇ m depending on the operating conditions.
- Figure 1 is a general sectional elevation view of this embodiment.
- FIG. 2 is a detail view in section along the line II-II in FIG. 1.
- Figure 3 is a sectional view along line III-III of Figure 2.
- the preheating of the ribbon 13 was preferably of the order of 410 "C, although tests were carried out between 390 ° C and 470 ° C, while the temperature of the molten alloy was generally of the order of 510 * 0.
- the coating thicknesses essentially varied, as has already been said, depending on the presence or not of the upper inserts 15a, 15b.
- the minimum thickness obtained under these conditions was 12 ⁇ m; without insert, this minimum thickness was 20 ⁇ m.
- the parameters influencing the thickness of the coating are the preheating temperature of the strip and its speed of movement.
- the thickness of the coating is dependent on the preheating temperature of the tape and the space between the tape and the inserts. No significant influence was found in the two cases with regard to the temperature of the molten metal or the coating alloy.
- the maximum coating thicknesses measured were of the order of 80 ⁇ m.
- FIG. 4 shows the influence of the dimension e (FIG. 3) corresponding to the horizontal surface of the lower molybdenum inserts 14a, 14b on the leaks of molten metal as a function of the height of the bath h in the interior space 10.
- Two curves are plotted on this diagram, one corresponding to a total space (on both sides) between the strip and the width of the lower opening 11 of 1.2 mm and the other to a space of 2 mm. These curves represent the limit from which a bandless metal leak occurs for an opening 11 34 mm in length.
- the preheating temperature was a big influence on the appearance of the coating.
- the coating did not have good adhesion and several small holes were observed in the 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)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8536072A JPH11505885A (en) | 1995-05-29 | 1996-05-17 | Method and apparatus for coating a metal strip with a metal or alloy having a lower melting point or liquidus point than the material forming the strip |
EP96913420A EP0828864A1 (en) | 1995-05-29 | 1996-05-17 | Method and apparatus for coating a metal strip with a metal or alloy with a lower melting or liquidus point than the strip material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1578/95-5 | 1995-05-29 | ||
CH157895 | 1995-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996038599A1 true WO1996038599A1 (en) | 1996-12-05 |
Family
ID=4213698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1996/000191 WO1996038599A1 (en) | 1995-05-29 | 1996-05-17 | Method and apparatus for coating a metal strip with a metal or alloy with a lower melting or liquidus point than the strip material |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0828864A1 (en) |
JP (1) | JPH11505885A (en) |
WO (1) | WO1996038599A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998001595A1 (en) * | 1996-07-05 | 1998-01-15 | Mannesmann Ag | Device for hot-dip coating metal band |
EP0933442A1 (en) * | 1998-01-29 | 1999-08-04 | Le Four Industriel Belge | Method and device for checking the thickness of a liquid metal coating on a filament |
EP1225245A1 (en) * | 2001-01-17 | 2002-07-24 | Recherche Et Developpement Du Groupe Cockerill Sambre | Process for preventing the entrainment of zinc particles on a galvanized sheet |
EP1760166B1 (en) * | 2005-09-02 | 2016-09-14 | Korea Bundy Co., Ltd. | Method for manufacturing a steel tube having improved corrosion-resistance |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3264692A (en) * | 1964-04-29 | 1966-08-09 | Gen Electric | Inlet orifice for continuous casting apparatus |
DE1900019A1 (en) * | 1968-01-02 | 1969-07-31 | Armco Steel Corp | Wire overdrawing process |
DE2247356A1 (en) * | 1972-09-27 | 1974-03-28 | Battelle Institut E V | Fibre strengthened light metals - made to any desired section in a single operation |
JPS56151163A (en) * | 1980-04-22 | 1981-11-24 | Mitsubishi Electric Corp | Dip forming device |
-
1996
- 1996-05-17 JP JP8536072A patent/JPH11505885A/en active Pending
- 1996-05-17 WO PCT/CH1996/000191 patent/WO1996038599A1/en not_active Application Discontinuation
- 1996-05-17 EP EP96913420A patent/EP0828864A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3264692A (en) * | 1964-04-29 | 1966-08-09 | Gen Electric | Inlet orifice for continuous casting apparatus |
DE1900019A1 (en) * | 1968-01-02 | 1969-07-31 | Armco Steel Corp | Wire overdrawing process |
DE2247356A1 (en) * | 1972-09-27 | 1974-03-28 | Battelle Institut E V | Fibre strengthened light metals - made to any desired section in a single operation |
JPS56151163A (en) * | 1980-04-22 | 1981-11-24 | Mitsubishi Electric Corp | Dip forming device |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 6, no. 36 (M - 115) 5 March 1982 (1982-03-05) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998001595A1 (en) * | 1996-07-05 | 1998-01-15 | Mannesmann Ag | Device for hot-dip coating metal band |
EP0933442A1 (en) * | 1998-01-29 | 1999-08-04 | Le Four Industriel Belge | Method and device for checking the thickness of a liquid metal coating on a filament |
EP1225245A1 (en) * | 2001-01-17 | 2002-07-24 | Recherche Et Developpement Du Groupe Cockerill Sambre | Process for preventing the entrainment of zinc particles on a galvanized sheet |
WO2002057505A1 (en) * | 2001-01-17 | 2002-07-25 | Recherche Et Developpement Du Groupe Cockerill Sambre | Method for avoiding drag-in of zinc particles on galvanized sheet metal |
EP1760166B1 (en) * | 2005-09-02 | 2016-09-14 | Korea Bundy Co., Ltd. | Method for manufacturing a steel tube having improved corrosion-resistance |
Also Published As
Publication number | Publication date |
---|---|
JPH11505885A (en) | 1999-05-25 |
EP0828864A1 (en) | 1998-03-18 |
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