SE532603C2 - Method of galvanizing steel material - Google Patents
Method of galvanizing steel materialInfo
- Publication number
- SE532603C2 SE532603C2 SE0801224A SE0801224A SE532603C2 SE 532603 C2 SE532603 C2 SE 532603C2 SE 0801224 A SE0801224 A SE 0801224A SE 0801224 A SE0801224 A SE 0801224A SE 532603 C2 SE532603 C2 SE 532603C2
- Authority
- SE
- Sweden
- Prior art keywords
- steel material
- dfi
- alloy metal
- temperature
- steel
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 46
- 239000010959 steel Substances 0.000 title claims description 46
- 239000000463 material Substances 0.000 title claims description 45
- 238000000034 method Methods 0.000 title claims description 39
- 238000005246 galvanizing Methods 0.000 title claims description 6
- 229910002065 alloy metal Inorganic materials 0.000 claims description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 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 3
- 230000006378 damage Effects 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000000137 annealing Methods 0.000 description 6
- 230000006698 induction Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation 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
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 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
Classifications
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- 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
- C23C2/26—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
- 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
Landscapes
- 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)
Description
25 30 532 EÜ3 Föreliggande uppfinning löser de ovan beskrivna problemen. The present invention solves the problems described above.
Således hänför sig uppfinningen till ett förfarande vid gal- vannealing av stålmaterial i form av en långsträckt stålpro- dukt som kontinuerligt bringas att transporteras längs med en processlina, varvid materialet i ett första steg förvärms till en första processtemperatur av mellan 350 och 450°C och beläggs med ett lager av en legeringsmetall i flytande form, i ett andra steg värms ytterligare till en andra processtem- peratur, som bringas att vara mellan 50 och 200°C varmare än den första processtemperaturen, och i ett tredje steg hålls vid den andra processtemperaturen under en förutbestämd tids- period av åtminstone några sekunder så att legeringsmetallbe- läggningen åtminstone delvis bringas att legeras med stålma- terialet, och utmärks av att värmningen i det andra steget bringas att utföras med hjälp av flera efter varandra längs med processlinan anordnade DFI-brännare, anordnade på sådant avstånd fràn stålmaterialet att deras respektive flamma slår an mot materialets varav åtminstone en DFI-brännare Yta, bringas att drivas med en oxidant som. till åtminstone 80 viktprocent utgörs av syre, av att stàlmaterialet kontinuer- ligt bringas att förflyttas i förhållande till varje DFI- brännare, och av att DFI-brännarna är anordnade pà sådant avstånd från varandra att stàlmaterialets yta mellan två på varandra följande DFI-brännare hinner svalna i så stor ut- sträckning att det när det passerar nästa DFï-brännare i ordningen inte hinner värmas över en viss förutbestämd tempe- ratur vid vilken risken för materialförstöring är oaccepta- belt hög.Thus, the invention relates to a process for galvanizing steel material in the form of an elongate steel product which is continuously transported along a process line, the material in a first step being preheated to a first process temperature of between 350 and 450 ° C and is coated with a layer of an alloy metal in liquid form, in a second step is further heated to a second process temperature, which is brought to be between 50 and 200 ° C hotter than the first process temperature, and in a third step is kept at the second process temperature for a predetermined period of time of at least a few seconds so that the alloy metal coating is at least partially caused to be alloyed with the steel material, and is characterized in that the heating in the second stage is carried out by means of several DFI burners arranged one after the other along the process line. , arranged at such a distance from the steel material that their respective flame strikes the material of which atm instone a DFI burner Surface, is brought to power with an oxidant that. to at least 80% by weight consists of oxygen, of the fact that the steel material is continuously moved in relation to each DFI burner, and of the DFI burners being arranged at such a distance from each other that the surface of the steel material between two successive DFI burners has time cool to such an extent that when it passes the next DFï burner in the order it does not have time to heat above a certain predetermined temperature at which the risk of material destruction is unacceptably high.
Uppfinningen kommer nu att beskrivas i detalj, med hänvisning till exemplifierande utföringsformer av uppfinningen och de bifogade ritningarna, där: 10 15 20 25 30 532 511113 Figur 1. är en principskiss som i tvärsnitt visar de olika beståndsdelarna i en process där ett konventionellt galv- annealingsförfarande utförs.The invention will now be described in detail, with reference to exemplary embodiments of the invention and the accompanying drawings, in which: Figure 1 is a schematic diagram showing in cross section the various components of a process in which a conventional galvanizing annealing procedure is performed.
Figur 2 är en pmincipskiss som i tvärsnitt visar de olika beståndsdelarna i en process där ett galvannealingsförfarande enligt föreliggande uppfinning utförs.Figure 2 is a schematic diagram showing in cross section the various components of a process in which a galvanizing process according to the present invention is carried out.
I Figur 1 illustreras hur en stålprodukt 101 i form av ett långsträckt band transporteras längs med olika processteg i en konventionell, kontinuerlig process för galvannealing. I ett första steg förs stâlprodukten genom ett bad 102 i vilket en legeringsmetall i form av zink 103 i flytande form före- finns. Det således doppade stálbandet 101 beläggs därmed med ett lager flytande zink.Figure 1 illustrates how a steel product 101 in the form of an elongate belt is transported along various process steps in a conventional, continuous process for galvanizing. In a first step, the steel product is passed through a bath 102 in which an alloy metal in the form of zinc 103 in liquid form is present. The steel strip 101 thus dipped is thus coated with a layer of liquid zinc.
I ett andra steg transporteras stålbandet 101 förbi ett par luftknivar 104, bandet 101. som avlägsnar överflödigt zink från ytan hos I ett tredje steg förs bandet genom en gasugn eller en induk- tionsugn 105, som höjer temperaturen hos stålbandet 101 så att glödgning påbörjas.In a second step, the steel strip 101 is transported past a pair of air knives 104, the strip 101. which removes excess zinc from the surface of In a third step, the strip is passed through a gas furnace or an induction furnace 105, which raises the temperature of the steel strip 101 so that annealing begins.
Glödgningen fullbordas därefter under en viss tidsperiod genon1 att bandet 101 transporteras genonl en hâllugn 106 i vilken stàlmaterialets 101 temperatur hålls konstant.The annealing is then completed for a certain period of time by the belt 101 being transported through a holding furnace 106 in which the temperature of the steel material 101 is kept constant.
Den process som illustreras i Figur 2 liknar den i Figur 1.The process illustrated in Figure 2 is similar to that in Figure 1.
Metallbandet 1 löper i ett första steg genom ett bad 3 med flytande zink 2, och därefter förbi ett par luftknivar 4. 10 15 20 25 30 532 EGP» Istället för ugnen 105 används emellertid, i ett andra steg, en eller flera DFI-brännare 5 för att ytterligare värma stål- bandet 1 till glödgningstemperatur. DFI-brännarna 5 är anord- nade pà sådant avstånd från stàlmaterialet 1 att deras re- spektive flamma slår an mot materialets 1 yta. Detta medför en mycket god effektivitet i värmeöverföringen.The metal strip 1 runs in a first step through a bath 3 with liquid zinc 2, and then past a pair of air knives 4. However, instead of the furnace 105, in a second step, one or more DFI burners are used. 5 to further heat the steel strip 1 to annealing temperature. The DFI burners 5 are arranged at such a distance from the steel material 1 that their respective flame strikes the surface of the material 1. This results in a very good efficiency in the heat transfer.
Därefter transporteras bandet l, i ett tredje steg, genom en hållugn 6 under en viss förutbestämd tidsperiod som tillåter glödgningen att fullbordas.Thereafter, the belt 1 is transported, in a third step, through a holding furnace 6 for a certain predetermined period of time which allows the annealing to be completed.
Genom att använda DFI-brännare 5 istället för en konventio- nell ugn eller induktionsugn 105 för att ytterligare öka temperaturen hos stálmaterialet l uppnås ett antal fördelar.By using DFI burner 5 instead of a conventional furnace or induction furnace 105 to further increase the temperature of the steel material 1, a number of advantages are obtained.
För det första är uppvärmningen med DFï-brännare snabb och effektiv, och väsentligen effektivare än en konventionell värmningsugn. Detta beror på att zink har en låg emissions- faktor, vilket medför en låg värmeöverföring mellan ugnsatmo- sfären och den zinkbelagda metallytan i en konventionell ugn.First, heating with DF1 burners is fast and efficient, and significantly more efficient than a conventional heating furnace. This is because zinc has a low emission factor, which results in a low heat transfer between the furnace atmosphere and the zinc-coated metal surface in a conventional furnace.
Detta problem uppstår inte med DFI-brännare.This problem does not occur with DFI burners.
För det andra är uppvärmningen. med DFI-brännare inte lika känslig för materialets 1 dimensioner samt mekaniska och geometriska konfiguration, vilket är fallet med till exempel konventionella induktionsvärmare.Second is the heating. with DFI burners not as sensitive to the 1 dimensions of the material as well as mechanical and geometric configuration, which is the case with, for example, conventional induction heaters.
För det tredje är värmning' med DFI-brännare ett billigare alternativ än induktionsvärmare, vilka kräver en installation av väsentligt större omfattning än vad som krävs för en mot- svarande DFI-värmning. 10 15 20 25 30 533 EÜ3 Temperaturen hos stàlbandet 1 när det lämnar zinkbadet 2, i det följande benämnd "den första processtemperaturen", är företrädesvis mellan 350°C och 450°C, enligt en föredragen utföringsfornm över cirka 420°C, vid vilken temperatur zink smälter.Third, heating with DFI burners is a cheaper alternative than induction heaters, which require an installation of a significantly greater extent than is required for a corresponding DFI heating. The temperature of the steel strip 1 as it leaves the zinc bath 2, hereinafter referred to as "the first process temperature", is preferably between 350 ° C and 450 ° C, according to a preferred embodiment above about 420 ° C, in which temperature zinc melts.
Värmningen med hjälp av DFIsbrännarna 5 är företrädesvis så intensiv att den slutgiltiga temperaturen för stålmaterialet 1, i det följande benämnd uppnås inom ett antal sekunder. Detta innebär att de delar av ”den andra processtemperaturen”, stàlmaterialets ytstruktur som deltar i legeringsprocessen med legeringsmetallen väsentligen i sin helhet har en tempe- ratur som åtminstone uppgår till den andra processtemperatu- ren inom ett antal sekunder. Den andra processtemperaturen är företrädesvis mellan 50 och l50°C varmare än den första pro- cesstemperaturen.The heating by means of the DFIs burners 5 is preferably so intense that the final temperature of the steel material 1, hereinafter referred to as, is reached within a number of seconds. This means that the parts of the “second process temperature”, the surface structure of the steel material that participate in the alloying process with the alloy metal essentially in its entirety have a temperature that at least reaches the second process temperature within a number of seconds. The second process temperature is preferably between 50 and 150 ° C warmer than the first process temperature.
För att uppnå maximal effektivitet för DFI~brännarna 5 är det föredraget att den oxidant som används vid förbränningen av bränslet utgörs till åtminstone 80 viktprocent av syre.In order to achieve maximum efficiency for the DFI burners, it is preferred that the oxidant used in the combustion of the fuel be at least 80% by weight of oxygen.
Bränslet kan vara vilket lämpligt bränsle som helst, såsom naturgas eller propan.The fuel can be any suitable fuel, such as natural gas or propane.
För att undvika överhettning hos ytan av stålmaterialet 1 är det föredraget att det kontinuerligt rör sig i förhållande till DFI-brännarna 5. Detta säkerställs exempelvis genom att låta processen vara av kontinuerlig typ, där stàlmaterialet l kontinuerligt transporteras längs med processlinan och därför hela tiden har en viss hastighet i förhållande till de på linan anordnade komponenterna, däribland DFI-brännarna 5.In order to avoid overheating of the surface of the steel material 1, it is preferred that it moves continuously in relation to the DFI burners 5. This is ensured, for example, by allowing the process to be of a continuous type, where the steel material 1 is continuously transported along the process line. a certain speed in relation to the components arranged on the line, including the DFI burners 5.
Det är även möjligt att anordna flera DFI-brännare efter varandra längs med processlinan, så att stålmaterialets 1 yta 10 15 20 25 30 532 EÜ3 erhåller en termisk impuls när det passerar varje DFI- brännare, och därefter hinner svalna något innan det passerar nästa DFI-brännare för att ta emot ytterligare värmeenergi.It is also possible to arrange several DFI burners one after the other along the process line, so that the surface of the steel material 1 receives a thermal impulse when it passes each DFI burner, and then has time to cool slightly before passing the next DFI. burner to receive additional heat energy.
Pâ detta sätt hinner 'värmen sprida sig genom 'värmeledning från stålmaterialets 1. yta till stålmaterialets 1. centrala delar mellan de av DFI-brännarna mottagna termiska impulser- na. Företrädesvis är DFI-brännarna i detta fall anordnade på sådant avstånd från varandra att stâlmaterialets 1 yta mellan två på varandra följande DFI-brännare hinner svalna i så stor utsträckning att stàlmaterialet, när det passerar nästa DFI- brännare i ordningen, inte hinner värmas över en viss förut- bestämd temperatur. Den förutbestämda temperaturen är lämpli- gen en temperatur vid vilken risken för materialförstöring är oacceptabelt hög, helst maximalt 565°C.In this way, the heat has time to spread through heat conduction from the surface of the steel material to the central parts of the steel material between the thermal impulses received by the DFI burners. Preferably, the DFI burners in this case are arranged at such a distance from each other that the surface of the steel material 1 between two successive DFI burners has time to cool to such an extent that the steel material, when it passes the next DFI burner in order, does not have time to heat over a certain predetermined temperature. The predetermined temperature is suitably a temperature at which the risk of material destruction is unacceptably high, preferably a maximum of 565 ° C.
Det är även möjligt att anordna två eller flera grupper av DFI-brännare på motsvarande sätt, där varje grupp av DFI- brännare samtidigt värmer stålmaterialet 1 från olika sidor.It is also possible to arrange two or more groups of DFI burners in a corresponding manner, where each group of DFI burners simultaneously heats the steel material 1 from different sides.
Det är föredraget att den förutbestämda tidsperiod under vilken stålmaterialet 1 hålls vid glödgningstemperatur i ugnen 6 är åtminstone ett antal sekunder, men denna tidsperi- ods längd kan naturligtvis anpassas till de aktuella förut- sättningarn , använt stålmaterial och legeringsmetall, och så vidare. För trädesvis hålls stàlmaterialet 1 vid en väsentli- gen konstan temperatur under en tidsperiod som är tillräck- ligt lång ör att tillåta åtminstone delvis legering mellan legeringsme allen 3 och stålmaterialet 1.It is preferred that 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, but the length of this time period can of course be adapted to the current conditions, used steel material and alloy metal, and so on. For treads, the steel material 1 is kept at a substantially constant temperature for a period of time long enough to allow at least partial alloying between the alloy material 3 and the steel material 1.
Ovan har föredragna utföringsformer beskrivits. Emellertid kan många förändringar göras av de beskrivna utföringsformer- na utan att fràngå uppfinningens tanke. 10 15 20 25 EEE G03 Således kan andra legeringsmetaller än zink användas för att i flytande form beläggas på stålmaterialets l yta. Exempel på sådana metaller är aluminium och blandningar av aluminium och zink. I dessa fall inses det även att den första processtem- peraturen kan anpassas till smältpunkten eller en annan vä- sentlig materialegenskap för den aktuella legeringsmetallen.Preferred embodiments have been described above. However, many changes may be made to the described embodiments without departing from the spirit of the invention. 10 15 20 25 EEE G03 Thus, alloy metals other than zinc can be used to be coated in liquid form on the surface of the steel material. Examples of such metals are aluminum and mixtures of aluminum and zinc. In these cases, it is also realized that the first process temperature can be adapted to the melting point or another essential material property of the alloy metal in question.
Det är naturligtvis även möjligt att anbringa den flytande legeringsmetallen 3 på stålmaterialet 1 på annat sätt än genom doppning, så länge som anbringningen sker mekaniskt och legeringsmetallen är i flytande form.Of course, it is also possible to apply the liquid alloy metal 3 to the steel material 1 by other means than by dipping, as long as the application takes place mechanically and the alloy metal is in liquid form.
Stâlmaterialet 1 behöver vidare inte vara i form av ett långsträckt stålband. Förfarandet är även användbart på andra långsträckta stålprodukter, såsom tråd och stång.Furthermore, the steel material 1 need not be in the form of an elongate steel strip. The method is also useful on other elongated steel products, such as wire and rod.
Luftknivarna 4 kan vidare i vissa tillämpningar ersättas med blàsverkan hos DFI-brännarna 5. ord kan DFI- brännarna 5 genom flammornas anslag mot stålmaterialets 1 yta Med andra avlägsna överflödig legeringsmetall, varför luftknivarna 4 inte längre behövs.Furthermore, in some applications the air knives 4 can be replaced by the blowing action of the DFI burners 5. In other words, the DFI burners 5 can by the abutment of the flames against the surface of the steel material 1 With others remove excess alloy metal, so the air knives 4 are no longer needed.
Sålunda skall uppfinningen inte vara begränsad av de beskriv- na utföringsformerna, utan kan varieras inonx ramen för de bifogade kraven.Thus, the invention should not be limited by the described embodiments, but may be varied within the scope of the appended claims.
Claims (7)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0801224A SE532603C2 (en) | 2008-05-26 | 2008-05-26 | Method of galvanizing steel material |
| EP08164665A EP2128296A1 (en) | 2008-05-26 | 2008-09-19 | Method for galvannealing steel materials |
| BRPI0909599A BRPI0909599A2 (en) | 2008-05-26 | 2009-05-19 | method for galvanizing and tempering a steel material |
| CN2009801192909A CN102046830A (en) | 2008-05-26 | 2009-05-19 | Method for galvannealing steel materials |
| US12/994,594 US20110146851A1 (en) | 2008-05-26 | 2009-05-19 | Method for galvannealing steel materials |
| PCT/SE2009/050567 WO2009145705A1 (en) | 2008-05-26 | 2009-05-19 | Method for galvannealing steel materials |
| KR1020107029019A KR20110010814A (en) | 2008-05-26 | 2009-05-19 | Method for galvannealing steel materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0801224A SE532603C2 (en) | 2008-05-26 | 2008-05-26 | Method of galvanizing steel material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE0801224L SE0801224L (en) | 2009-11-27 |
| SE532603C2 true SE532603C2 (en) | 2010-03-02 |
Family
ID=39929718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE0801224A SE532603C2 (en) | 2008-05-26 | 2008-05-26 | Method of galvanizing steel material |
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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884582B (en) * | 2014-03-27 | 2016-05-04 | 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 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB382274A (en) * | 1931-07-13 | 1932-10-13 | Julian Louis Schueler | Apparatus and method for wiping molten metallic coatings |
| 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 |
| 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 |
| US8025982B2 (en) * | 2005-12-06 | 2011-09-27 | Kobe Steel, Ltd. | High-strength hot dip galvannealed steel sheet having high powdering resistance and method for producing the same |
| SE529299C2 (en) * | 2005-12-27 | 2007-06-26 | Aga Ab | A method of adjusting the hardness of a sheet-like metal product |
| SE530353C2 (en) * | 2006-04-25 | 2008-05-13 | Aga Ab | DFI burner comprising a metal block and two nozzles extending from the metal block |
-
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 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 CN CN2009801192909A patent/CN102046830A/en active Pending
- 2009-05-19 US US12/994,594 patent/US20110146851A1/en not_active Abandoned
- 2009-05-19 KR KR1020107029019A patent/KR20110010814A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0909599A2 (en) | 2015-09-22 |
| EP2128296A1 (en) | 2009-12-02 |
| US20110146851A1 (en) | 2011-06-23 |
| WO2009145705A1 (en) | 2009-12-03 |
| CN102046830A (en) | 2011-05-04 |
| SE0801224L (en) | 2009-11-27 |
| KR20110010814A (en) | 2011-02-07 |
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| Date | Code | Title | Description |
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| NUG | Patent has lapsed |