WO2015129202A1 - 還元炉の露点制御方法および還元炉 - Google Patents
還元炉の露点制御方法および還元炉 Download PDFInfo
- Publication number
- WO2015129202A1 WO2015129202A1 PCT/JP2015/000742 JP2015000742W WO2015129202A1 WO 2015129202 A1 WO2015129202 A1 WO 2015129202A1 JP 2015000742 W JP2015000742 W JP 2015000742W WO 2015129202 A1 WO2015129202 A1 WO 2015129202A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- reduction furnace
- dew point
- furnace
- reduction
- Prior art date
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 238000005246 galvanizing Methods 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 238000007747 plating Methods 0.000 abstract description 23
- 238000005275 alloying Methods 0.000 abstract description 19
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract description 9
- 239000008397 galvanized steel Substances 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 88
- 230000003647 oxidation Effects 0.000 description 19
- 238000007254 oxidation reaction Methods 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 16
- 238000002791 soaking Methods 0.000 description 10
- 230000005587 bubbling Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 239000012510 hollow fiber Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical group [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0012—Rolls; Roll arrangements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- 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
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
-
- 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
-
- 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
-
- 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
-
- 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
- C23C2/26—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
- C23C2/40—Plates; Strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
- F27B9/045—Furnaces with controlled atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
Definitions
- the present invention relates to a dew point control method for a reducing furnace and a reducing furnace.
- high-tensile steel high-tensile steel
- high-tensile strength steel steel in steel has good hole expandability by containing Si, and residual ⁇ (retained by containing Si or Al). It has been found that ⁇ ) is easy to form and a steel sheet with good ductility can be obtained.
- hot dip galvanized steel sheet hot-dip galvanized steel sheet
- galvannealed steel sheet hot-dip galvannealed steel sheet
- the hot dip galvanized steel sheet is subjected to hot dip galvanization after being heat-annealed at a temperature of about 600 to 900 ° C. in a non-oxidizing atmosphere or a reducing atmosphere.
- Si in steel is an easily oxidizable element and is selectively oxidized in a generally used non-oxidizing atmosphere or reducing atmosphere to concentrate on the surface to form an oxide.
- This oxide reduces the wettability with the molten zinc during the plating process and causes non-plating (bare spot), so that the wettability (wettability) decreases sharply as the Si concentration in the steel increases and unplating occurs. It occurs frequently. In addition, even when non-plating does not occur, there is a problem that the plating adhesion is poor. Further, when Si in the steel is selectively oxidized and concentrated on the surface, a significant alloying delay occurs in the alloying process after hot dip galvanizing. As a result, productivity is significantly inhibited. When trying to alloy at an excessively high temperature to ensure productivity, there is also a problem of causing deterioration of anti-powdering properties, so that both high productivity and good powdering resistance are achieved. It is difficult.
- Patent Document 1 and Patent Document 2 use a direct-fired furnace (DFF) (direct fired furnace) or a non-oxidation furnace (NOF) (non-oxidation furnace).
- DFF direct-fired furnace
- NOF non-oxidation furnace
- Patent Document 3 the supply gas is humidified by passing the gas through warm water, the inside of the furnace is divided and controlled by a sealing device, and the H 2 concentration and dew point in the annealing furnace are controlled to a predetermined range.
- Patent Document 4 discloses a method of adjusting the dew point by directly injecting water vapor into a heating furnace.
- the present invention can provide a hot-dip galvanized steel sheet that can ensure plating adhesion even with Si-added steel and can be alloyed without excessively raising the alloying temperature and having an excellent plating appearance. It is an object of the present invention to provide a reduction furnace dew point control method and a reduction furnace.
- the gist of the present invention for solving the above problems is as follows.
- a steel sheet is annealed and hot dip galvanized in a continuous hot dip galvanizing facility having at least a radiant tube type reducing furnace
- a water vapor permeable membrane is used as a gas supplied to the reducing furnace.
- the dew point control method of a reduction furnace characterized by controlling the dew point in a reduction furnace by supplying the said mixed gas into a reduction furnace using the mixed gas of the gas humidified with the humidifier which has, and a dry gas.
- a reduction furnace that constitutes a part of the continuous hot-dip galvanizing equipment, has a water vapor permeable membrane, humidifies a part of the dry gas supplied to the reduction furnace, and a predetermined flow rate controlled to a predetermined temperature
- a constant temperature water tank for supplying the water to the humidifier, a gas mixer for mixing the gas humidified by the humidifier and the dry gas, and a mixed gas mixed by the gas mixer into the reduction furnace
- the humidifier includes a pipe through which the gas after humidification passes, and the pipe is maintained at a temperature equal to or higher than a dew point of the gas after humidification. 4].
- a hot dip galvanized steel sheet having a beautiful surface appearance can be reduced in productivity. And can be manufactured stably. Moreover, a hot-dip galvanized steel sheet can be manufactured very stably without being influenced by disturbances such as temperature and weather.
- a heating furnace for heating and heating the steel sheet is DFF (direct fire type) or NOF (non-oxidation type)
- soaking furnace that soaks the heated steel plate is a radiant tube (RTF) type
- all radiant tube type is a radiant tube from the heating furnace to the soaking furnace.
- the furnace part including the radiant tube is referred to as a reduction furnace. That is, when the heating furnace is a DFF (direct flame type) or NOF (non-oxidation type) and the soaking furnace is a radiant tube (RTF) type, the soaking furnace is a reduction furnace. In the case of the all radiant tube type in which the entire range from the heating furnace to the soaking furnace is a radiant tube, the reducing furnace is from the heating furnace to the soaking furnace.
- the heating furnace is of DFF (direct flame type) or NOF (non-oxidation type) and the soaking furnace is of radiant tube (RTF) type, all radiant tube type.
- RTF radiant tube
- the dew point in the reduction furnace can be controlled with high accuracy, and the plating property is ensured even in the case of a steel plate containing a large amount of an easily oxidizable element such as Si.
- FIG. 1 is a diagram showing a configuration example of a continuous hot dip galvanizing facility including an annealing furnace and a plating apparatus.
- 1 is a steel plate
- 2 is a direct-fired heating zone (DFF)
- 3 is a reduction furnace (radiant tube type)
- 4 is a quenching zone
- 5 is a slow cooling zone
- 6 is a plating apparatus.
- the steel plate 1 is heated in the direct-fired heating zone (DFF) 2 (oxidation treatment step), then reduced in the reduction furnace 3 (reduction annealing step), and then cooled in the quenching zone 4 and the slow cooling zone 5. (Cooling step), plating is performed by the plating apparatus 6.
- DFF direct-fired heating zone
- reduction furnace 3 reduction furnace 3
- Cooling step plating is performed by the plating apparatus 6.
- FIG. 2 shows the configuration of the reduction furnace 3 shown in FIG. 1, and is a diagram showing an embodiment of the reduction furnace of the present invention.
- the supply route of the gas supplied into the furnace in the reduction furnace (radiant tube type) 3 is shown.
- 7 is a humidifying device
- 8 is a circulating water bath
- 9 is a gas mixing device
- 10 is a gas distribution device
- 11 is a dew point meter for supply gas
- 12 is a dew point sampling point in the furnace (3 locations)
- 13 is a gas. Supply piping.
- part of the gas (dry gas) supplied to the reduction furnace is distributed to the humidifier 7 by the gas distributor 10 as the humidifying gas, and the remaining dry gas is sent to the gas mixer 9.
- the gas is either N 2 gas or mixed gas of N 2 gas and H 2 gas.
- the humidifying gas distributed by the gas distributor 10 is sent, and at the same time, the water controlled to a predetermined temperature at a predetermined flow rate by the circulating constant temperature water tank 8, preferably pure water, is sent.
- the humidifying device 7 has a humidifying module having a fluorine-containing resin, a polyimide-based hollow fiber membrane, a flat membrane, or the like as a water vapor permeable membrane.
- the humidifying gas distributed by the gas distribution device 10 flows, and the water adjusted to a predetermined temperature in the circulating constant temperature water tank 8 flows and circulates outside the membrane.
- the fluororesin-based or polyimide-based hollow fiber membrane or flat membrane is a kind of ion exchange membrane having an affinity for water molecules.
- a force is generated to equalize the concentration difference, and the moisture permeates the membrane toward a lower moisture concentration using that force as a driving force. Then move.
- the humidifying gas becomes a gas humidified to the same dew point as the temperature of the water circulating outside the membrane.
- the gas humidified by the humidifier 7 is mixed with the dry gas sent from the gas distributor 10 by the gas mixer 9 and supplied to the reduction furnace, that is, the gas is supplied through the gas supply pipe 13 as a supply gas. Supplied into the furnace.
- the dew point collection points 12 there are three dew point collection points 12 in the furnace, and the dew point in the reduction furnace is measured. Then, in response to the measurement result, the supply gas dew point and flow rate are controlled to an appropriate range while monitoring the supply gas dew point meter 11, and the dew point in the reduction furnace is adjusted to a desired range.
- the reducing furnace 3 is constantly supplied with a dry N 2 gas having a dew point of ⁇ 60 to ⁇ 40 ° C. or a mixed gas of N 2 and H 2 .
- a part of the dry gas is humidified by the humidifier 7 and mixed with the dry gas by the gas mixer 9 to be adjusted to a predetermined dew point gas, and then supplied into the reduction furnace 3.
- the drying gas temperature changes according to the season and daily temperature change.
- the humidified gas of the present invention performs heat exchange by sufficiently taking the contact area of the gas and water through the water vapor permeable membrane, and the dry gas temperature before the humidifier is higher or lower than the circulating water temperature. Since the gas is humidified to the same dew point as the set water temperature, it is not affected by the season or daily temperature changes. Highly accurate dew point control is possible.
- the humidifying gas can be arbitrarily controlled in the range of 0 to 50 ° C.
- the dew point of the gas supplied into the reducing furnace 3 is preferably less than + 10 ° C. Moreover, 0 degreeC or less is preferable from the reason for minimizing the uniformity of a dew point distribution in a reducing furnace, and the dew point fluctuation range.
- the pipe through which the gas supplied into the furnace passes is heated and kept at a temperature equal to or higher than the dew point of the humidified gas.
- three dew point collection points 12 in the furnace are installed, and the dew points are measured at a plurality of points.
- H 2 O has a low specific gravity with respect to N 2 that normally occupies 40 to 95 vol%, so that it easily accumulates in the upper part of the reduction furnace 3 and is reduced.
- the dew point at the top of the furnace 3 tends to increase. As described above, since a problem such as pick-up occurs at a dew point of + 10 ° C.
- the dew point at the top of the reducing furnace 3 it is important to measure the dew point at the top of the reducing furnace 3 in order to manage the upper limit of the dew point in the reducing furnace 3.
- the iron oxide formed on the steel sheet surface in the oxidation treatment process in addition to the reduction of oxygen, the oxygen supplied from the iron oxide forms an alloy element of Si or Mn as an internal oxide inside the steel sheet.
- the alloying temperature of the Si-containing steel becomes high, so that decomposition of the retained austenite phase into the pearlite phase and temper softening of the martensite phase occur, and the desired machine Characteristics may not be obtained. Therefore, as a result of investigating the technology for reducing the alloying temperature, the technology for reducing the amount of solid solution Si in the steel sheet surface layer and promoting the alloying reaction by more actively forming the internal oxidation of Si. Devised. In order to more actively form internal oxidation of Si, it is effective to control the atmospheric dew point in the annealing furnace to -20 ° C or higher.
- the dew point in the reduction annealing furnace is controlled to ⁇ 20 ° C. or higher, oxygen is supplied from the iron oxide, and even after the internal oxide of Si is formed, the oxygen supplied from the H 2 O in the atmosphere causes the inside of the Si. As oxidation continues, more Si internal oxidation is formed. Then, the amount of solute Si decreases in the region inside the steel sheet surface layer where the internal oxidation is formed. When the amount of solute Si decreases, the surface layer of the steel sheet behaves as if it is a low Si steel, the subsequent alloying reaction is promoted, and the alloying reaction proceeds at a low temperature.
- the desired strength can be obtained without the progress of ductility improvement and the temper softening of the martensite phase by maintaining the retained austenite phase at a high fraction.
- the steel plate iron begins to oxidize, so the upper limit can be managed at 0 ° C. for the reason of minimizing the uniformity of the dew point distribution in the reducing furnace and the dew point fluctuation range. preferable.
- the heating furnace is DFF (direct flame type) and the soaking furnace is a radiant tube (RTF) type
- the steel sheets having the composition shown in Table 1 were subjected to annealing and hot dip galvanizing treatment. .
- alloying treatment was performed to produce an alloyed hot-dip galvanized steel sheet.
- a DFF is used in which the heating burner is divided into four groups (# 1 to # 4), and the three groups (# 1 to # 3) (previous stage) upstream of the steel plate moving direction are the oxidation zone and the final zone (# 4) (Subsequent stage) was a reduction zone, and the air ratio of the oxidation zone and the reduction zone was individually controlled.
- the length of each zone is 4 m.
- the humidifier is a polyimide-based hollow fiber membrane humidifier.
- the humidified gas and the dry gas were mixed and then supplied to the reduction furnace.
- the supply gas supply ports are provided at three places in the lower part of the furnace and three places in the middle of the furnace.
- the hollow fiber membrane humidifier was composed of 10 membrane modules, and a maximum of 500 L / min N 2 + H 2 mixed gas and a maximum of 10 L / min circulating water were passed through each module.
- the N 2 + H 2 gas mixture is pre-adjusted for introduction into the reduction furnace, and the dew point is constant at ⁇ 50 ° C., but the piping to the reduction furnace changes according to the outside air temperature, so the gas temperature becomes the outside air temperature. To change. Therefore, the piping was kept warm so that the temperature was higher than the dew point of the gas after humidification.
- the circulating constant temperature water tank can supply a total of 100 L / min of pure water.
- the plating bath temperature was 460 ° C.
- the Al concentration in the plating bath was 0.130%
- the adhesion amount was adjusted to 45 g / m 2 per side by gas wiping.
- the alloying temperature was alloyed in an induction heating type alloying furnace so that the degree of film alloying (Fe content) was within 10 to 13%.
- FIG. 3 For comparison, a conventional bubbling humidifier (FIG. 3) was used as a soaking furnace. In the bubbling method, the same gas amount and circulating water amount were mixed and humidified in one water tank. In addition, it is the same as the said Example except a humidifier.
- the plating appearance and material strength of the galvannealed steel sheet obtained as described above were evaluated.
- the evaluation of the plating appearance is carried out by inspection with an optical surface defect meter (detecting non-plating defects or peroxide defects of ⁇ 0.5 mm or more) and visual alloying unevenness judgment. If there is even one failure, it was marked as x.
- the material strength was evaluated by tensile strength, and the tensile strength was 590 MPa or more for steel type A, 780 MPa or more for steel type B, and 1180 MPa or more for steel type C.
- No. 1 to No. 12 are No. 13 to 24 show the implementation results in summer.
- the results obtained as described above are shown in Table 2 together with the conditions.
- the time in the table is the elapsed operation time.
- 1 and 13 are the results at the time of switching from a conventional humidifier using bubbling to a humidifier having a water vapor permeable membrane. Further, after 1 hour and 30 minutes from the start of the operation, the conventional humidification apparatus by bubbling was switched again.
- Fig. 4 shows the dew point transition from the relationship between the time shown in Table 2 and the middle dew point of the reduction zone.
- time: 0 minutes is switching from a humidifier by bubbling to a humidifier having a water vapor permeable membrane
- FIG. 4 shows that in the example of the present invention, the desired dew point can be controlled in a short time regardless of summer or winter.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
[1]少なくともラジアントチューブ型の還元炉を有する連続溶融亜鉛めっき設備にて鋼板に焼鈍と溶融亜鉛めっき処理を施す際に、還元炉に供給するガスとして、水蒸気透過膜(water vapor permeable membrane)を有する加湿装置で加湿されたガスと乾燥ガスとの混合ガスを用い、前記混合ガスを還元炉内に供給することで還元炉内の露点を制御することを特徴とする還元炉の露点制御方法。
[2]前記還元炉内の露点を-20~0℃に制御することを特徴とする前記[1]に記載の還元炉の露点制御方法。
[3]連続溶融亜鉛めっき設備の一部を構成する還元炉であり、水蒸気透過膜を有し、還元炉に供給する乾燥ガスの一部を加湿する加湿装置と、所定温度に制御した所定流量の水を前記加湿装置に供給する循環恒温水槽と、前記加湿装置により加湿されたガスと乾燥ガスを混合するガス混合装置と、前記ガス混合装置により混合された混合ガスを還元炉内に供給するガス供給配管と、還元炉内に供給する混合ガスの露点を計測する供給ガス用露点計を備えた還元炉。
[4]さらに、還元炉に供給する乾燥ガスの一部を加湿装置へ分配し、残りの乾燥ガスをガス混合装置へ供給するガス分配装置を備えた前記[3]に記載の還元炉。
[5]前記加湿装置は、加湿後のガスが通過する配管を有しており、前記配管は加湿後のガスの露点以上の温度に保温されていることを特徴とする前記[3]または[4]に記載の還元炉。
加熱炉では、加熱用バーナーを4つの群(#1~#4)に分割したDFFを用い、鋼板移動方向上流側の3つの群(#1~#3)(前段)は酸化ゾーン、最終ゾーン(#4)(後段)は還元ゾーンとし、酸化ゾーンおよび還元ゾーンの空気比を個別に制御した。なお、各ゾーンの長さは4mである。
なお、加湿装置以外は、上記実施例と同じである。
2 直火型加熱帯(DFF)
3 還元炉(ラジアントチューブタイプ)
4 急冷帯
5 徐冷帯
6 めっき装置
7 加湿装置
8 循環恒温水槽
9 ガス混合装置
10 ガス分配装置
11 供給ガス用露点計
12 炉内露点採取箇所(3箇所)
13 ガス供給配管
Claims (5)
- 少なくともラジアントチューブ型の還元炉を有する連続溶融亜鉛めっき設備にて鋼板に焼鈍と溶融亜鉛めっき処理を施す際に、
還元炉に供給するガスとして、水蒸気透過膜を有する加湿装置で加湿したガスと乾燥ガスとの混合ガスを用い、前記混合ガスを還元炉内に供給することで還元炉内の露点を制御することを特徴とする還元炉の露点制御方法。 - 前記還元炉内の露点を-20~0℃に制御することを特徴とする請求項1に記載の還元炉の露点制御方法。
- 連続溶融亜鉛めっき設備の一部を構成する還元炉であり、
水蒸気透過膜を有し、還元炉に供給する乾燥ガスの一部を加湿する加湿装置と、
所定温度に制御した所定流量の水を前記加湿装置に供給する循環恒温水槽と、
前記加湿装置により加湿されたガスと乾燥ガスを混合するガス混合装置と、
前記ガス混合装置により混合したガスを還元炉内に供給するガス供給配管と、
還元炉内に供給するガスの露点を計測する供給ガス用露点計を備えた還元炉。 - さらに、還元炉に供給する乾燥ガスの一部を加湿装置へ分配し、残りの乾燥ガスをガス混合装置へ供給するガス分配装置を備えた請求項3に記載の還元炉。
- 前記加湿装置は、加湿後のガスが通過する配管を有しており、前記配管は加湿後のガスの露点以上の温度に保温されていることを特徴とする請求項3または4に記載の還元炉。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/119,022 US20160363372A1 (en) | 2014-02-25 | 2015-02-18 | Method for controlling dew point of reduction furnace, and reduction furnace |
MX2016010931A MX2016010931A (es) | 2014-02-25 | 2015-02-18 | Metodo para controlar punto de rocio en horno de reduccion, y horno de reduccion. |
CN201580010513.3A CN106029932B (zh) | 2014-02-25 | 2015-02-18 | 还原炉的露点控制方法以及还原炉 |
EP15755331.4A EP3112493B1 (en) | 2014-02-25 | 2015-02-18 | Method for controlling dew point of reduction furnace, and reduction furnace |
KR1020167026229A KR101893509B1 (ko) | 2014-02-25 | 2015-02-18 | 환원로의 노점 제어 방법 및 환원로 |
JP2016505043A JP6052464B2 (ja) | 2014-02-25 | 2015-02-18 | 還元炉の露点制御方法および還元炉 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014034270 | 2014-02-25 | ||
JP2014-034270 | 2014-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015129202A1 true WO2015129202A1 (ja) | 2015-09-03 |
Family
ID=54008539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/000742 WO2015129202A1 (ja) | 2014-02-25 | 2015-02-18 | 還元炉の露点制御方法および還元炉 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20160363372A1 (ja) |
EP (1) | EP3112493B1 (ja) |
JP (1) | JP6052464B2 (ja) |
KR (1) | KR101893509B1 (ja) |
CN (1) | CN106029932B (ja) |
MX (1) | MX2016010931A (ja) |
TW (1) | TWI537396B (ja) |
WO (1) | WO2015129202A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017072989A1 (ja) * | 2015-10-27 | 2017-05-04 | Jfeスチール株式会社 | 溶融亜鉛めっき鋼板の製造方法 |
KR20170093215A (ko) * | 2015-01-08 | 2017-08-14 | 제이에프이 스틸 가부시키가이샤 | 합금화 용융 아연 도금 강판의 제조 방법 |
CN110612359A (zh) * | 2017-05-11 | 2019-12-24 | 杰富意钢铁株式会社 | 热浸镀锌钢板的制造方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6566141B2 (ja) * | 2017-04-27 | 2019-08-28 | Jfeスチール株式会社 | 合金化溶融亜鉛めっき鋼板の製造方法及び連続溶融亜鉛めっき装置 |
WO2019092467A1 (en) * | 2017-11-08 | 2019-05-16 | Arcelormittal | A galvannealed steel sheet |
EP3730662B1 (en) * | 2017-12-22 | 2021-11-17 | JFE Steel Corporation | Method for producing hot-dip galvanized steel sheet and continuous hot-dip galvanizing apparatus |
CN111826511A (zh) * | 2020-06-15 | 2020-10-27 | 华菱安赛乐米塔尔汽车板有限公司 | 一种提高高强带钢在热浸镀产工艺可镀性的方法 |
CN113063192B (zh) * | 2021-04-06 | 2022-08-19 | 首钢京唐钢铁联合有限责任公司 | 一种加湿装置以及加湿方法 |
WO2023111632A1 (en) * | 2021-12-14 | 2023-06-22 | Arcelormittal | Atmosphere furnace control |
CN114480986B (zh) * | 2022-01-28 | 2023-03-24 | 本钢板材股份有限公司 | 一种热镀锌双相钢带钢及其生产工艺 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59200719A (ja) * | 1983-04-27 | 1984-11-14 | Sumitomo Metal Ind Ltd | ガス調湿法 |
JPH05271891A (ja) * | 1992-03-30 | 1993-10-19 | Nippon Steel Corp | 高強度溶融亜鉛めっき鋼板の製造方法 |
JP2000067893A (ja) * | 1998-08-25 | 2000-03-03 | Fuji Electric Co Ltd | 固体高分子型燃料電池 |
JP2008275185A (ja) * | 2007-04-25 | 2008-11-13 | Taiyo Nippon Sanso Corp | 加湿ガス供給方法 |
JP2014001898A (ja) * | 2012-06-19 | 2014-01-09 | Kitz Microfilter Corp | 湿潤ガス発生方法と小流量用調湿装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5023113A (en) * | 1988-08-29 | 1991-06-11 | Armco Steel Company, L.P. | Hot dip aluminum coated chromium alloy steel |
JP2705386B2 (ja) * | 1991-08-27 | 1998-01-28 | 住友金属工業株式会社 | Si含有鋼板の溶融亜鉛めっき方法 |
JP4671493B2 (ja) * | 2000-12-05 | 2011-04-20 | 宇部興産株式会社 | ガス分離膜およびその使用方法 |
JP2005264305A (ja) | 2004-03-22 | 2005-09-29 | Jfe Steel Kk | 雰囲気ガスの加湿方法及びその装置 |
RU2387734C2 (ru) | 2005-10-14 | 2010-04-27 | Ниппон Стил Корпорейшн | Непрерывный способ отжига и нанесения покрытия методом горячего погружения и система для непрерывного отжига и нанесения покрытия методом горячего погружения кремнийсодержащего стального листа |
JP5720084B2 (ja) | 2009-03-06 | 2015-05-20 | Jfeスチール株式会社 | 連続溶融亜鉛めっき装置および溶融亜鉛めっき鋼板の製造方法 |
JP5614159B2 (ja) | 2009-10-30 | 2014-10-29 | Jfeスチール株式会社 | 高強度溶融亜鉛めっき鋼板および高強度合金化溶融亜鉛めっき鋼板の製造方法 |
-
2015
- 2015-02-18 WO PCT/JP2015/000742 patent/WO2015129202A1/ja active Application Filing
- 2015-02-18 EP EP15755331.4A patent/EP3112493B1/en active Active
- 2015-02-18 US US15/119,022 patent/US20160363372A1/en not_active Abandoned
- 2015-02-18 MX MX2016010931A patent/MX2016010931A/es unknown
- 2015-02-18 CN CN201580010513.3A patent/CN106029932B/zh active Active
- 2015-02-18 JP JP2016505043A patent/JP6052464B2/ja active Active
- 2015-02-18 KR KR1020167026229A patent/KR101893509B1/ko active IP Right Grant
- 2015-02-25 TW TW104106031A patent/TWI537396B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59200719A (ja) * | 1983-04-27 | 1984-11-14 | Sumitomo Metal Ind Ltd | ガス調湿法 |
JPH05271891A (ja) * | 1992-03-30 | 1993-10-19 | Nippon Steel Corp | 高強度溶融亜鉛めっき鋼板の製造方法 |
JP2000067893A (ja) * | 1998-08-25 | 2000-03-03 | Fuji Electric Co Ltd | 固体高分子型燃料電池 |
JP2008275185A (ja) * | 2007-04-25 | 2008-11-13 | Taiyo Nippon Sanso Corp | 加湿ガス供給方法 |
JP2014001898A (ja) * | 2012-06-19 | 2014-01-09 | Kitz Microfilter Corp | 湿潤ガス発生方法と小流量用調湿装置 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170093215A (ko) * | 2015-01-08 | 2017-08-14 | 제이에프이 스틸 가부시키가이샤 | 합금화 용융 아연 도금 강판의 제조 방법 |
KR101949631B1 (ko) | 2015-01-08 | 2019-02-18 | 제이에프이 스틸 가부시키가이샤 | 합금화 용융 아연 도금 강판의 제조 방법 |
WO2017072989A1 (ja) * | 2015-10-27 | 2017-05-04 | Jfeスチール株式会社 | 溶融亜鉛めっき鋼板の製造方法 |
JP2017082278A (ja) * | 2015-10-27 | 2017-05-18 | Jfeスチール株式会社 | 溶融亜鉛めっき鋼板の製造方法 |
CN108138297A (zh) * | 2015-10-27 | 2018-06-08 | 杰富意钢铁株式会社 | 热浸镀锌钢板的制造方法 |
KR20180064497A (ko) * | 2015-10-27 | 2018-06-14 | 제이에프이 스틸 가부시키가이샤 | 용융 아연 도금 강판의 제조 방법 |
EP3369836A4 (en) * | 2015-10-27 | 2018-11-07 | JFE Steel Corporation | Method for manufacturing hot-dip galvanized steel sheet |
KR102072560B1 (ko) * | 2015-10-27 | 2020-02-03 | 제이에프이 스틸 가부시키가이샤 | 용융 아연 도금 강판의 제조 방법 |
CN110612359A (zh) * | 2017-05-11 | 2019-12-24 | 杰富意钢铁株式会社 | 热浸镀锌钢板的制造方法 |
US11421312B2 (en) | 2017-05-11 | 2022-08-23 | Jfe Steel Corporation | Method for manufacturing hot-dip galvanized steel sheet |
Also Published As
Publication number | Publication date |
---|---|
TWI537396B (zh) | 2016-06-11 |
KR20160125472A (ko) | 2016-10-31 |
MX2016010931A (es) | 2016-11-18 |
JP6052464B2 (ja) | 2016-12-27 |
CN106029932A (zh) | 2016-10-12 |
CN106029932B (zh) | 2019-03-15 |
EP3112493A4 (en) | 2017-03-29 |
EP3112493A1 (en) | 2017-01-04 |
KR101893509B1 (ko) | 2018-08-30 |
US20160363372A1 (en) | 2016-12-15 |
JPWO2015129202A1 (ja) | 2017-03-30 |
EP3112493B1 (en) | 2022-12-14 |
TW201538743A (zh) | 2015-10-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6052464B2 (ja) | 還元炉の露点制御方法および還元炉 | |
KR101949631B1 (ko) | 합금화 용융 아연 도금 강판의 제조 방법 | |
US10752975B2 (en) | Method of producing galvannealed steel sheet | |
KR102026708B1 (ko) | 연속 용융 아연 도금 장치 및 용융 아연 도금 강판의 제조 방법 | |
US20230323501A1 (en) | Continuous hot-dip galvanizing apparatus | |
JP7111059B2 (ja) | 還元性雰囲気炉の露点制御方法および還元性雰囲気炉、ならびに冷延鋼板の製造方法および溶融亜鉛めっき鋼板の製造方法 | |
JPWO2018198493A1 (ja) | 合金化溶融亜鉛めっき鋼板の製造方法及び連続溶融亜鉛めっき装置 | |
JP5915569B2 (ja) | 溶融亜鉛めっき鋼板の製造方法および連続溶融亜鉛めっき装置 | |
JP6439654B2 (ja) | 溶融亜鉛めっき鋼板の製造方法 | |
JP2016180136A (ja) | 連続溶融亜鉛めっき装置及び溶融亜鉛めっき鋼板の製造方法 | |
WO2023286501A1 (ja) | 溶融亜鉛めっき鋼板の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2016505043 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15755331 Country of ref document: EP Kind code of ref document: A1 |
|
REEP | Request for entry into the european phase |
Ref document number: 2015755331 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015755331 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15119022 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2016/010931 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: IDP00201606311 Country of ref document: ID |
|
ENP | Entry into the national phase |
Ref document number: 20167026229 Country of ref document: KR Kind code of ref document: A |