US20110146851A1 - Method for galvannealing steel materials - Google Patents
Method for galvannealing steel materials Download PDFInfo
- Publication number
- US20110146851A1 US20110146851A1 US12/994,594 US99459409A US2011146851A1 US 20110146851 A1 US20110146851 A1 US 20110146851A1 US 99459409 A US99459409 A US 99459409A US 2011146851 A1 US2011146851 A1 US 2011146851A1
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- steel material
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- alloying metal
- process temperature
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- 239000000463 material Substances 0.000 title claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005244 galvannealing Methods 0.000 title claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000005275 alloying Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 17
- 229910052725 zinc Inorganic materials 0.000 claims description 16
- 239000011701 zinc Substances 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 230000006866 deterioration Effects 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 230000006698 induction Effects 0.000 description 8
- 238000000137 annealing Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000001294 propane Substances 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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
-
- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
-
- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Definitions
- the present invention relates to a method for use when galvannealing steel materials.
- Galvannealing is a process in which steel material is both galvanised and annealed.
- the galvanising typically takes place by dipping the steel material in a bath of liquid zinc.
- the steel material may be preheated before it is dipped and/or may be heated by contact with the liquid zinc.
- the steel material is further heated, up to a temperature where annealing takes place.
- the zinc coating forms an alloy at the surface of the steel material, which alloy offers attractive properties in terms of corrosion resistance, etc.
- Induction heating is indeed efficient, but it is sensitive for the dimensions and the geometrical configuration of the heated material. Moreover, zinc is not heated as well as steel, why temperature gradients may arise. Finally, devices for induction heating are typically very costly.
- Heating in an air gas furnace does not lead to any dimension or material geometry related problems, but on the other hand it is substantially less efficient as compared to induction heating. Because of the low emission factor of zinc, it is also difficult to increase the heat transfer to the material, why the rate of production is limited.
- the present invention solves the above described problems.
- the invention relates to a method when galvannealing a steel material, in which the material, in a first step, is preheated to a first process temperature and is coated with a layer of a liquid alloying metal, in a second step is further heated to a second, higher process temperature, and in a third step is kept at the second process temperature during a predetermined time period so that the alloying metal coating at least partially is caused to alloy with the steel material, and is characterised in that the heating in the second step is caused to be carried out by one or several DFI burners.
- FIG. 1 is a cross-sectional overview showing the various component parts used in a process in which a conventional galvannealing process is carried out.
- FIG. 2 is a cross-sectional overview showing the various component parts used in a process in which a galvannealing process according to the present invention is carried out.
- FIG. 1 it is illustrated how a steel product 101 in the form of an elongated strip is transported along various process steps in a conventional, continuous process for galvannealing.
- a first step the steel product is conveyed through a bath 102 in which an alloying metal in the form of liquid zinc 103 is present. Accordingly, the steel strip 101 thus dipped is coated with a layer of liquid zinc.
- the steel strip 101 is transported past a pair of air knives 104 , removing surplus zinc from the surface of the strip 101 .
- the strip is conveyed through a gas or induction furnace 105 , which boosts the temperature of the steel strip 101 so that annealing is initiated.
- the annealing is completed during a certain time period by the strip 101 being transported through a holding furnace 106 in which the temperature of the steel material 101 is kept constant.
- the process illustrated in FIG. 2 is similar to that of FIG. 1 .
- the metal strip 1 runs through a bath 3 with liquid zinc 2 , and thereafter past a pair of air knives 4 .
- one or several DFI burners 5 are used in a second step in order to further heat the steel strip 1 to its annealing temperature.
- the DFI burners 5 are arranged at such a distance from the steel material 1 so that their respective flames strike the surface of the material 1 . This guarantees very good heat transfer efficiency.
- the strip 1 is transported, in a third step, through a holding furnace 6 during a certain predetermined time period, to allow the annealing to be completed.
- heating with DFI burners is not as sensitive for the dimensions of the material 1 and its mechanical and geometrical configuration, which is the case with, for example, conventional induction heaters.
- the temperature of the steel strip 1 when leaving the zinc bath 2 is preferably between 350° C. and 450° C., according to a preferred embodiment above about 420° C., at which temperature zinc melts.
- the heating using the DFI burners 5 is preferably so intense that the final temperature of the steel material 1 , in the following referred to as “the second process temperature”, is achieved within a few seconds. This means that those parts of the surface structure of the steel material that take part in the alloying process with the alloying metal essentially and in their entirety have a temperature which at least amounts to the second process temperature within a few seconds.
- the second process temperature is preferably between 50 and 150° C. warmer than the first process temperature.
- the oxidant being used for the combustion of the fuel is comprised of at least 80 percentages by weight of oxygen.
- the fuel may be any suitable fuel, such as natural gas or propane.
- the process being of a continuous type, in which the steel material 1 is continuously transported along the process line and thereafter at all the time has a certain velocity in relation to the components being arranged on the line, notably the DFI burners 5 .
- the DFI burners are arranged at such a distance from each other so that the surface of the steel material 1 has time to cool down between two consecutive DFI burners to such an extent so that when passing the next DFI burner it will not be heated above a certain predetermined temperature.
- the predetermined temperature is suitably a temperature at which the risk for material deterioration is unacceptably high, most preferably maximally 560° C.
- the predetermined time period during which the steel material 1 is kept at annealing temperature in the furnace 6 is at least a number of seconds, however this time period can naturally be adapted to the present prerequisites, the used steel material and alloying metal, and so forth.
- the steel material 1 is kept at an essentially constant temperature during a time period which is sufficiently long in order to allow at least partial alloying between the alloying metal 3 and the steel material 1 .
- alloying metals than zinc may be used for coating the surface of the steel material 1 in liquid form.
- metals are aluminium and mixtures of aluminium and zinc.
- the first process temperature may be adapted to the melting point, or to any other essential material property, of the currently used alloying metal.
- liquid alloying metal 3 onto the steel material 1 in other ways than by dipping, as long as the application takes place mechanically and as long as the alloying metal is in liquid form.
- the steel material 1 does not have to be in the form of an elongated steel strip.
- the method is also useful for other elongated steel products, such as wire and rods.
- the air knives 4 may in certain applications be replaced with blowing action from the DFI burners 5 .
- the DFI burners 5 may remove surplus alloying metal using the striking of the flames against the surface of the steel material 1 , whereby the air knives 4 are no longer necessary.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
Method for use when galvannealing a steel material (1), in which the material (1), in a first step, is preheated to a first process temperature and is coated with a layer of a liquid alloying metal (3), in a second step is further heated to a second, higher process temperature, and in a third step is kept at the second process temperature during a predetermined time period so that the alloying metal coating at least partially is caused to alloy with the steel material (1). The heating in the second step is caused to be carried out by one or several DFI burners (5).
Description
- The present invention relates to a method for use when galvannealing steel materials.
- Galvannealing is a process in which steel material is both galvanised and annealed. The galvanising typically takes place by dipping the steel material in a bath of liquid zinc. The steel material may be preheated before it is dipped and/or may be heated by contact with the liquid zinc.
- Thereafter, the steel material is further heated, up to a temperature where annealing takes place. As the material is kept at this higher temperature, the zinc coating forms an alloy at the surface of the steel material, which alloy offers attractive properties in terms of corrosion resistance, etc.
- Conventionally in such a process, either induction heating or heating in an air gas furnace is used for further heating the material. Both of these strategies involve problems.
- Induction heating is indeed efficient, but it is sensitive for the dimensions and the geometrical configuration of the heated material. Moreover, zinc is not heated as well as steel, why temperature gradients may arise. Finally, devices for induction heating are typically very costly.
- Heating in an air gas furnace does not lead to any dimension or material geometry related problems, but on the other hand it is substantially less efficient as compared to induction heating. Because of the low emission factor of zinc, it is also difficult to increase the heat transfer to the material, why the rate of production is limited.
- The present invention solves the above described problems.
- Thus, the invention relates to a method when galvannealing a steel material, in which the material, in a first step, is preheated to a first process temperature and is coated with a layer of a liquid alloying metal, in a second step is further heated to a second, higher process temperature, and in a third step is kept at the second process temperature during a predetermined time period so that the alloying metal coating at least partially is caused to alloy with the steel material, and is characterised in that the heating in the second step is caused to be carried out by one or several DFI burners.
- In the following, the invention will be described in detail, with reference to exemplifying embodiments of the invention and to the appended drawings, in which:
-
FIG. 1 is a cross-sectional overview showing the various component parts used in a process in which a conventional galvannealing process is carried out. -
FIG. 2 is a cross-sectional overview showing the various component parts used in a process in which a galvannealing process according to the present invention is carried out. - In
FIG. 1 , it is illustrated how asteel product 101 in the form of an elongated strip is transported along various process steps in a conventional, continuous process for galvannealing. In a first step, the steel product is conveyed through abath 102 in which an alloying metal in the form ofliquid zinc 103 is present. Accordingly, thesteel strip 101 thus dipped is coated with a layer of liquid zinc. - In a second step, the
steel strip 101 is transported past a pair ofair knives 104, removing surplus zinc from the surface of thestrip 101. - In a third step, the strip is conveyed through a gas or
induction furnace 105, which boosts the temperature of thesteel strip 101 so that annealing is initiated. - Thereafter, the annealing is completed during a certain time period by the
strip 101 being transported through aholding furnace 106 in which the temperature of thesteel material 101 is kept constant. - The process illustrated in
FIG. 2 is similar to that ofFIG. 1 . In a first step, themetal strip 1 runs through abath 3 withliquid zinc 2, and thereafter past a pair ofair knives 4. - However, instead of the
furnace 105, one orseveral DFI burners 5 are used in a second step in order to further heat thesteel strip 1 to its annealing temperature. TheDFI burners 5 are arranged at such a distance from thesteel material 1 so that their respective flames strike the surface of thematerial 1. This guarantees very good heat transfer efficiency. - Thereafter, the
strip 1 is transported, in a third step, through aholding furnace 6 during a certain predetermined time period, to allow the annealing to be completed. - By using
DFI burners 5 instead of a conventional furnace or aninduction furnace 105 in order to further boost the temperature of thesteel material 1, a number of advantages are achieved. - Firstly, heating using DFI burners is rapid and efficient, and substantially more efficient than a conventional heating furnace. The reason for this is that zinc has a low emission factor, which gives a low heat transfer rate between the furnace atmosphere and the zinc coated metal surface in a conventional furnace. This problem does not arise with DFI burners.
- Secondly, heating with DFI burners is not as sensitive for the dimensions of the
material 1 and its mechanical and geometrical configuration, which is the case with, for example, conventional induction heaters. - Thirdly, heating with DFI burners is a cheaper alternative to induction heaters, the latter requiring a more complex installation than what is necessary for corresponding DFI heating.
- The temperature of the
steel strip 1 when leaving thezinc bath 2, in the following referred to as “the first process temperature”, is preferably between 350° C. and 450° C., according to a preferred embodiment above about 420° C., at which temperature zinc melts. - The heating using the
DFI burners 5 is preferably so intense that the final temperature of thesteel material 1, in the following referred to as “the second process temperature”, is achieved within a few seconds. This means that those parts of the surface structure of the steel material that take part in the alloying process with the alloying metal essentially and in their entirety have a temperature which at least amounts to the second process temperature within a few seconds. The second process temperature is preferably between 50 and 150° C. warmer than the first process temperature. - In order to achieve maximum efficiency for the
DFI burners 5, it is preferred that the oxidant being used for the combustion of the fuel is comprised of at least 80 percentages by weight of oxygen. The fuel may be any suitable fuel, such as natural gas or propane. - In order to avoid overheating of the surface of the
steel material 1, it is preferred that it is in continuous motion in relation to theDFI burners 5. For example, this may be achieved by the process being of a continuous type, in which thesteel material 1 is continuously transported along the process line and thereafter at all the time has a certain velocity in relation to the components being arranged on the line, notably theDFI burners 5. - It is also possible to arrange several consecutive DFI burners along the process line, so that the surface of the
steel material 1 obtains a thermal impulse when passing each DFI burner, and thereafter has time to cool down somewhat before passing the next DFI burner and there receiving additional thermal energy. In this way, the heat has time to transfer through heat conduction from the surface of thesteel material 1 to the central parts of thesteel material 1 between the thermal impulses received from the DFI burners. Preferably, in this case the DFI burners are arranged at such a distance from each other so that the surface of thesteel material 1 has time to cool down between two consecutive DFI burners to such an extent so that when passing the next DFI burner it will not be heated above a certain predetermined temperature. The predetermined temperature is suitably a temperature at which the risk for material deterioration is unacceptably high, most preferably maximally 560° C. - It is also possible to arrange two or several groups of DFI burners in a corresponding manner, where each group of DFI burners simultaneously heats the
steel material 1 from different sides. - It is preferred that the predetermined time period during which the
steel material 1 is kept at annealing temperature in thefurnace 6 is at least a number of seconds, however this time period can naturally be adapted to the present prerequisites, the used steel material and alloying metal, and so forth. Preferably, thesteel material 1 is kept at an essentially constant temperature during a time period which is sufficiently long in order to allow at least partial alloying between thealloying metal 3 and thesteel material 1. - Above, preferred embodiments have been described. However, many modifications may be made to the described embodiments without departing from the spirit of the invention.
- Thus, other alloying metals than zinc may be used for coating the surface of the
steel material 1 in liquid form. Examples of such metals are aluminium and mixtures of aluminium and zinc. In these cases, it is also realised that the first process temperature may be adapted to the melting point, or to any other essential material property, of the currently used alloying metal. - Of course, it is also possible to apply the liquid alloying
metal 3 onto thesteel material 1 in other ways than by dipping, as long as the application takes place mechanically and as long as the alloying metal is in liquid form. - Furthermore, the
steel material 1 does not have to be in the form of an elongated steel strip. The method is also useful for other elongated steel products, such as wire and rods. - Moreover, the
air knives 4 may in certain applications be replaced with blowing action from theDFI burners 5. In other words, theDFI burners 5 may remove surplus alloying metal using the striking of the flames against the surface of thesteel material 1, whereby theair knives 4 are no longer necessary. - Thus, the invention shall not be limited by the described embodiments, but may be varied within the frame of the appended claims.
Claims (8)
1-13. (canceled)
14. Method for use when galvannealing a steel material (1) in the form of an elongated steel product which is transported along a process line, in which the material (1), in a first step, is preheated to a first process temperature of between 350 and 450° C. and is coated with a layer of a liquid alloying metal (3), in a second step is further heated to a second process temperature which is caused to be between 50 and 200° C. warmer than the first process temperature, and in a third step is kept at the second process temperature during a predetermined time period of at least a number of seconds so that the alloying metal coating at least partially is caused to alloy with the steel material (1), characterised in that the heating in the second step is caused to be carried out by several DFI burners (5), arranged one after another along the process line at such a distance from the steel material (1) so that their respective flames strike the surface of the material (1), in that at least one DFI burner (5) is caused to be driven with an oxidant which to at least 80 percentages by weight is comprised of oxygen, in that the steel material (1) is held in continuous motion in relation to each DFI burner (5), and in that the DFI burners (5) are arranged at such a distance from each other so that the surface of the steel material (1) has time to cool down between two consecutive DFI burners to such an extent so that when passing the next consecutive DFI burner it will not be heated above a certain predetermined temperature at which the risk for material deterioration is unacceptably high.
15. The method according to claim 14 , characterised in that the certain predetermined temperature is not more than 565° C.
16. The method according to claim 14 , characterised in that the steel material (1) is a steel strip.
17. The method according to claim 14 , characterised in that the additional heating is caused to be so intense that it goes on only a few seconds before the second process temperature is reached.
18. The method according to claim 14 , characterised in that the flame from at least one DFI burner (5) is caused to remove any surplus alloying metal from the surface of the material (1).
19. The method according to claim 14 , characterised in that the alloying metal (3) comprises zinc.
20. The method according to claim 14 , characterised in that the alloying metal (3) comprises aluminum.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0801224-7 | 2008-05-26 | ||
SE0801224A SE532603C2 (en) | 2008-05-26 | 2008-05-26 | Method of galvanizing steel material |
PCT/SE2009/050567 WO2009145705A1 (en) | 2008-05-26 | 2009-05-19 | Method for galvannealing steel materials |
Publications (1)
Publication Number | Publication Date |
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US20110146851A1 true US20110146851A1 (en) | 2011-06-23 |
Family
ID=39929718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/994,594 Abandoned US20110146851A1 (en) | 2008-05-26 | 2009-05-19 | Method for galvannealing steel materials |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110146851A1 (en) |
EP (1) | EP2128296A1 (en) |
KR (1) | KR20110010814A (en) |
CN (1) | CN102046830A (en) |
BR (1) | BRPI0909599A2 (en) |
SE (1) | SE532603C2 (en) |
WO (1) | WO2009145705A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103884582A (en) * | 2014-03-27 | 2014-06-25 | 上海江南长兴重工有限责任公司 | JFE-LT-FH32 low-temperature steel flame process and verification method thereof |
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US3056694A (en) * | 1958-07-11 | 1962-10-02 | Inland Steel Co | Galvanizing process |
US3322558A (en) * | 1963-06-14 | 1967-05-30 | Selas Corp Of America | Galvanizing |
JPS58161757A (en) * | 1982-03-18 | 1983-09-26 | Kawasaki Steel Corp | Producing device for steel plate galvanized on one side |
US20070248923A1 (en) * | 2006-04-25 | 2007-10-25 | Aga Ab | Direct flame impingement burner |
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GB382274A (en) * | 1931-07-13 | 1932-10-13 | Julian Louis Schueler | Apparatus and method for wiping molten metallic coatings |
FR2527638A1 (en) * | 1982-05-27 | 1983-12-02 | Stein Heurtey | METHOD FOR HEATING A COATED STRIP FOR TRANSFORMING THE COATING STRUCTURE, PARTICULARLY FOR PRODUCING SHEETS |
JPH02209459A (en) * | 1989-02-09 | 1990-08-20 | Nippon Steel Corp | Method for sealing of plated steel strip-alloying furnace |
JP2745428B2 (en) * | 1989-11-30 | 1998-04-28 | 日新製鋼株式会社 | X-ray diffraction method for evaluating the processing performance of alloyed zinc plated steel sheets for high processing |
JP2904891B2 (en) * | 1990-08-31 | 1999-06-14 | 日新製鋼株式会社 | Online alloying degree measuring device for galvanized steel sheet |
JPH05132750A (en) * | 1991-11-11 | 1993-05-28 | Nippon Steel Corp | Burner structure of direct-fired heater |
JPH05195051A (en) * | 1992-01-20 | 1993-08-03 | Mitsubishi Heavy Ind Ltd | Direct-fire burner type uniformly heating device |
JPH05247619A (en) * | 1992-03-03 | 1993-09-24 | Nippon Steel Corp | Vertical type galvannealing furnace for manufacturing galvannealed steel sheet |
JPH05311381A (en) * | 1992-05-12 | 1993-11-22 | Kawasaki Steel Corp | Method for controlling sheet temperature of gavannealing furnace |
KR100992225B1 (en) * | 2005-12-06 | 2010-11-05 | 가부시키가이샤 고베 세이코쇼 | High-strength galvannealed sheet steels excellent in powdering resistance and process for production of the same |
SE529299C2 (en) * | 2005-12-27 | 2007-06-26 | Aga Ab | A method of adjusting the hardness of a sheet-like metal product |
-
2008
- 2008-05-26 SE SE0801224A patent/SE532603C2/en not_active IP Right Cessation
- 2008-09-19 EP EP08164665A patent/EP2128296A1/en not_active Withdrawn
-
2009
- 2009-05-19 CN CN2009801192909A patent/CN102046830A/en active Pending
- 2009-05-19 WO PCT/SE2009/050567 patent/WO2009145705A1/en active Application Filing
- 2009-05-19 BR BRPI0909599A patent/BRPI0909599A2/en not_active Application Discontinuation
- 2009-05-19 KR KR1020107029019A patent/KR20110010814A/en not_active Application Discontinuation
- 2009-05-19 US US12/994,594 patent/US20110146851A1/en not_active Abandoned
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US3056694A (en) * | 1958-07-11 | 1962-10-02 | Inland Steel Co | Galvanizing process |
US3322558A (en) * | 1963-06-14 | 1967-05-30 | Selas Corp Of America | Galvanizing |
JPS58161757A (en) * | 1982-03-18 | 1983-09-26 | Kawasaki Steel Corp | Producing device for steel plate galvanized on one side |
US20070248923A1 (en) * | 2006-04-25 | 2007-10-25 | Aga Ab | Direct flame impingement burner |
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"Hot-Dip Zinc-Aluminum Coatings." From the article "Dip, Barrier, and Chemical Conversion Coatings" of the ASM Handbook. 2002. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103884582A (en) * | 2014-03-27 | 2014-06-25 | 上海江南长兴重工有限责任公司 | JFE-LT-FH32 low-temperature steel flame process and verification method thereof |
Also Published As
Publication number | Publication date |
---|---|
BRPI0909599A2 (en) | 2015-09-22 |
CN102046830A (en) | 2011-05-04 |
KR20110010814A (en) | 2011-02-07 |
SE0801224L (en) | 2009-11-27 |
WO2009145705A1 (en) | 2009-12-03 |
SE532603C2 (en) | 2010-03-02 |
EP2128296A1 (en) | 2009-12-02 |
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