CN113481455A - Method for producing high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using air knife - Google Patents
Method for producing high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using air knife Download PDFInfo
- Publication number
- CN113481455A CN113481455A CN202110772202.8A CN202110772202A CN113481455A CN 113481455 A CN113481455 A CN 113481455A CN 202110772202 A CN202110772202 A CN 202110772202A CN 113481455 A CN113481455 A CN 113481455A
- Authority
- CN
- China
- Prior art keywords
- air knife
- zinc
- aluminum
- strip
- plating solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- -1 zinc-aluminum-magnesium Chemical compound 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 46
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 40
- 239000011701 zinc Substances 0.000 claims abstract description 40
- 238000007747 plating Methods 0.000 claims abstract description 37
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 18
- 239000011777 magnesium Substances 0.000 claims abstract description 18
- 238000007598 dipping method Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 238000004381 surface treatment Methods 0.000 claims abstract description 3
- 239000001257 hydrogen Substances 0.000 claims description 22
- 229910052739 hydrogen Inorganic materials 0.000 claims description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 18
- 238000000137 annealing Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- 238000003618 dip coating Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims 3
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 claims 3
- 230000007547 defect Effects 0.000 abstract description 18
- 230000003647 oxidation Effects 0.000 abstract description 11
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 8
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 238000001514 detection method Methods 0.000 description 6
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a method for producing a high-surface-quality zinc-aluminum-magnesium coating steel strip/plate by using an air knife, belonging to the technical field of zinc-aluminum-magnesium alloy coatings, and comprising a rolling process, a hot dipping process, an air knife process and a surface treatment process, wherein in the hot dipping process, the plating solution comprises the following components in percentage by weight: 1.0-2.8% of Al, Mg: 0.8-1.5 percent of zinc and inevitable impurities as the rest, and the temperature of the plating solution is 420-480 ℃; in the air knife process, an air knife is adopted, and the weight of a coating is controlled to be 60-230 g/m2The distance between the air knife and the strip steel is 4-10 mm, and the pressure of the air knife40 to 270mbar and 140 to 280mm of air knife height. The invention can improve the fluidity of zinc liquid by controlling the components and the temperature of the plating solution in the hot dipping process, and reduces the oxidation and cooling speed of the plating solution on the surface of the strip steel by reducing the distance between the air knife and the strip steel, the pressure of the air knife and the height of the air knife, thereby eliminating the defects of zinc flow lines, horseshoe marks and the like and greatly reducing the oxidation of magnesium in the plating layer.
Description
Technical Field
The invention relates to the technical field of zinc-aluminum-magnesium alloy coating, in particular to a method for producing a high-surface-quality zinc-aluminum-magnesium coating steel strip/plate by using an air knife.
Background
The hot-dip galvanized aluminum-magnesium coating steel strip/plate has excellent corrosion resistance, processability, weldability, coating property and the like, and is widely applied to the fields of buildings, highway guardrails, solar supports, photovoltaic industrial supports, animal husbandry and the like. However, because the magnesium element in the zinc-aluminum-magnesium plating solution has strong metal property, magnesium oxide slag is easily generated by air oxidation during hot plating, and the zinc-aluminum-magnesium slag reduces the fluidity of the plating solution, so that the defects of zinc flow lines, horseshoe marks, beard lines and the like appear on the surface of the strip steel, which seriously affect the surface quality of the zinc-aluminum-magnesium plating steel strip/plate product and cannot be accepted by users. In order to eliminate the defects of zinc flow lines and the like, the existing hot-dip galvanized aluminum-magnesium coating steel plate adopts a nitrogen air knife, so that the oxidation of magnesium during the blowing of the air knife of the coating liquid is reduced, and the surface quality of a product is improved. However, the air knife is commonly used by domestic galvanizing units at present, the investment for improving the nitrogen air knife and increasing the nitrogen production capacity is large, and the use of the nitrogen air knife can increase extra cost for the production of the zinc-aluminum-magnesium coated steel plate. Therefore, the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by the air knife can reduce the production cost of zinc and has positive significance for producing the high-quality aluminum-magnesium coated steel strip/plate by the conventional air knife hot galvanizing unit.
Disclosure of Invention
In order to overcome the defects that the magnesium oxidation is easily caused by the existing air knife, the cost of the reformed nitrogen air knife is high and the like, the technical problems to be solved by the invention are as follows: provides a method for producing a high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using an air knife.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the method for producing the high-surface-quality zinc-aluminum-magnesium coating steel strip/plate by using the air knife comprises a rolling process, a hot dipping process, an air knife process and a surface treatment process, wherein in the hot dipping process, the plating solution comprises the following components in percentage by weight: 1.0-2.8% of Al, Mg: 0.8-1.5 percent of zinc and inevitable impurities as the rest, and the temperature of the plating solution is 420-480 ℃; in the air knife process, an air knife is adopted, and the weight of a coating is controlled to be 60-230 g/m2The distance between the air knife and the strip steel is 4-10 mm, the pressure of the air knife is 40-270 mbar, and the height of the air knife is 140-280 mm.
Further, an annealing process is also included before the hot dipping process, and nitrogen-hydrogen protective atmosphere is adopted in a preheating section, a heating section, a soaking section and a cooling section of the annealing furnace, wherein the volume percentage of hydrogen concentration is 2.5-5%, and the volume percentage of hydrogen concentration in a balancing section is 15-30%.
Further, in the hot dip coating process, the temperature of the strip steel in a zinc pot is 470-520 ℃.
Further, in the air knife process, the distance between an air knife and the strip steel is 4-6 mm, the pressure of the air knife is 40-190 mbar, and the height of the air knife is 140-220 mm.
The invention has the beneficial effects that: the method can improve the fluidity of zinc liquid and eliminate the defects caused by non-uniform flowing of the zinc liquid such as zinc flow lines, beard lines, horseshoe marks and the like by controlling the components and the temperature of the plating liquid in a hot dipping process, and reduces the oxidation and cooling speed of the plating liquid on the surface of the strip steel by reducing the distance between an air knife and the strip steel, the pressure of the air knife and the height of the air knife by matching with a specific air knife process, thereby eliminating the defects of the zinc flow lines, the horseshoe marks and the like and greatly reducing the oxidation of magnesium in a plating layer.
Detailed Description
The present invention will be further described with reference to the following examples.
At present, most of hot-dip galvanized aluminum-magnesium coated steel plates adopt a nitrogen air knife, so that magnesium oxidation of the plating solution during air knife blowing can be reduced, and the surface quality of products is improved. However, the air knife is commonly used by domestic galvanizing units at present, the investment for improving the nitrogen air knife and increasing the nitrogen production capacity is large, and the use of the nitrogen air knife can increase extra cost for the production of the zinc-aluminum-magnesium coated steel plate. Aiming at the defects, the function of reducing magnesium oxidation can be achieved even if an air knife is adopted by improving a hot dip plating process and an air knife process, and the method comprises the following specific steps:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife comprises an annealing furnace reduction process, a hot dipping process and an air knife process, wherein in the hot dipping process, the plating solution comprises the following components in percentage by weight: 1.0-2.8% of Al, Mg: 0.8-1.5 percent of zinc and inevitable impurities as the rest, and the temperature of the plating solution is 420-480 ℃; in the air knife process, an air knife is adopted, and the weight of a coating is controlled to be 60-230 g/m2The distance between the air knife and the strip steel is 4-10 mm, the pressure of the air knife is 40-270 mbar, and the height of the air knife is 140-280 mm.
The invention improves the fluidity of zinc liquid and eliminates the defects of zinc flow lines, beard lines, horseshoe marks and the like caused by non-uniform flow of the zinc liquid by designing the components and the temperature of the zinc-aluminum-magnesium plating solution. Then, an air knife process is matched, oxidation and cooling of plating solution on the surface of the strip steel are reduced by reducing air knife pressure, defects such as zinc flow lines, horseshoe marks and the like are eliminated, the effect is better when the air knife distance, the air knife pressure and the air knife height are lower, but the lower limit value is the air knife limit; if the air knife distance, the air knife pressure and the air knife height are higher than the upper limit value, the defects of zinc flow lines, horseshoe marks and the like are easy to occur.
Further, an annealing process is also included before the hot dipping process, and nitrogen-hydrogen protective atmosphere is adopted in a preheating section, a heating section, a soaking section and a cooling section of the annealing furnace, wherein the volume percentage of hydrogen concentration is 2.5-5%, and the volume percentage of hydrogen concentration in a balancing section is 15-30%. The nitrogen-hydrogen protective gas provides a good reducing atmosphere, ensures that an oxide film on the surface of the strip steel is completely reduced, carries out hot plating by using spongy pure iron, and can be matched with the subsequent hot dipping and air knife process to eliminate the defects of poor adhesion of a plating layer, beard lines and the like.
In the hot dip coating process and the air knife process, the following preferred schemes are also adopted:
1. in the hot dip coating process, the temperature of strip steel entering a zinc pot is 470-520 ℃, so that the fluidity of a plating solution on the surface of the strip steel is improved, and the defects of zinc flow lines, horseshoe marks and the like are reduced.
2. In the air knife process, the distance between an air knife and strip steel is 4-6 mm, the pressure of the air knife is 40-190 mbar, and the height of the air knife is 140-220 mm. The air pressure is reduced as much as possible, the height of the air knife and the distance between the air knife and the strip steel are reduced, the brightness and the smoothness of the surface of a coating are guaranteed, and the oxidation of magnesium can be reduced.
This is further illustrated by the following examples.
Example 1:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife is adopted, and the test is carried out according to the following parameters: the thickness of the strip steel is 1.5mm, and the thickness of the coating is 220g/m2The speed of the unit is 70m/min, the hydrogen concentration of the preheating section, the heating section, the soaking section and the cooling section of the annealing furnace is 2.5 percent, the hydrogen concentration of the equalizing section is 15 percent, the temperature of the strip steel in a zinc pot is 470 ℃, the components of the plating solution are 1.0 percent of Al, 0.8 percent of Mg, and the balance of zinc and inevitable impurities, and the temperature of the plating solution is 450 ℃: the distance between the air knife and the strip steel is 4mm, the pressure of the air knife is 40mbar, and the height of the air knife is 140 mm.
Through detection, the zinc-aluminum-magnesium coating product produced by the embodiment has no defects of zinc flow marks and the like, and has good surface quality and uniform plate surface.
Example 2:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife is adopted, and the test is carried out according to the following parameters: the thickness of the strip steel is 1.2mm, and the thickness of the coating is 60g/m2The speed of the unit is 75m/min, the hydrogen concentration of the preheating section, the heating section, the soaking section and the cooling section of the annealing furnace is 2.7 percent, the hydrogen concentration of the equalizing section is 22 percent, the temperature of the strip steel in a zinc pot is 480 ℃, the plating solution comprises 1.8 percent of Al, 1.2 percent of Mg and the balance of zinc and inevitable impurities by weight percent, and the temperature of the plating solution is 420 ℃: the distance between the air knife and the strip steel is 7mm, the air knife pressure is 92mbar, and the air knife height is 200 mm.
Through detection, the zinc-aluminum-magnesium coating product produced by the embodiment has no defects of zinc flow marks and the like, and has good surface quality and uniform plate surface.
Example 3:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife is adopted, and the test is carried out according to the following parameters: the thickness of the strip steel is 1.0mm, and the thickness of the coating is 230g/m2The speed of the unit is 78m/min, the hydrogen concentration of the preheating section, the heating section, the soaking section and the cooling section of the annealing furnace is 5.0 percent, the hydrogen concentration of the equalizing section is 30 percent, the temperature of the strip steel in a zinc pot is 520 ℃, the plating solution comprises 2.8 percent of Al, 1.5 percent of Mg and the balance of zinc and inevitable impurities by weight percent, and the temperature of the plating solution is 480 ℃: the distance between the air knife and the strip steel is 10mm, the pressure of the air knife is 63mbar, and the height of the air knife is 160 mm.
Through detection, the zinc-aluminum-magnesium coating product produced by the embodiment has no defects of zinc flow marks and the like, and has good surface quality and uniform plate surface.
Example 4:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife is adopted, and the test is carried out according to the following parameters: the thickness of the strip steel is 0.5mm, and the thickness of the coating is 80g/m2The speed of the unit is 100m/min, the hydrogen concentration of the preheating section, the heating section, the soaking section and the cooling section of the annealing furnace is 4.2 percent, the hydrogen concentration of the equalizing section is 25 percent, the temperature of the strip steel in a zinc pot is 490 ℃, the plating solution comprises the components of 1.7 percent of Al, 1.3 percent of Mg and the balance of zinc and inevitable impurities by weight percent, and the temperature of the plating solution is 470 ℃: the distance between the air knife and the strip steel is 6mm, the air knife pressure is 220mbar, and the air knife height is 220 mm.
Through detection, the zinc-aluminum-magnesium coating product produced by the embodiment has no defects of zinc flow marks and the like, and has good surface quality and uniform plate surface.
Example 5:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife is adopted, and the test is carried out according to the following parameters: the thickness of the strip steel is 0.5mm, and the thickness of the coating is 120g/m2The speed of the unit is 120m/min, the hydrogen concentration of the preheating section, the heating section, the soaking section and the cooling section of the annealing furnace is 3.6 percent, the hydrogen concentration of the equalizing section is 20 percent, the temperature of the strip steel in a zinc pot is 500 ℃, the plating solution comprises 2.0 percent of Al, 1.4 percent of Mg and the balance of zinc and inevitable impurities by weight percent, and the temperature of the plating solution is 460 ℃: distance between air knife and strip steel5mm, an air-knife pressure of 190mbar and an air-knife height of 240 mm.
Through detection, the zinc-aluminum-magnesium coating product produced by the embodiment has no defects of zinc flow marks and the like, and has good surface quality and uniform plate surface.
Example 6:
the method for producing the high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using the air knife is adopted, and the test is carried out according to the following parameters: the thickness of the strip steel is 0.6mm, and the thickness of the coating is 80g/m2The speed of the unit is 100m/min, the hydrogen concentration of the preheating section, the heating section, the soaking section and the cooling section of the annealing furnace is 3.2 percent, the hydrogen concentration of the equalizing section is 18 percent, the temperature of the strip steel in a zinc pot is 495 ℃, the plating solution comprises the following components, by weight, 1.5 percent of Al, 1.0 percent of Mg and the balance of zinc and inevitable impurities, and the temperature of the plating solution is 440 ℃: the distance between the air knife and the strip steel is 7mm, the pressure of the air knife is 275mbar, and the height of the air knife is 280 mm.
Through detection, the zinc-aluminum-magnesium coating product produced by the embodiment has no defects of zinc flow marks and the like, and has good surface quality and uniform plate surface.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (4)
1. The method for producing the high surface quality zinc-aluminum-magnesium coating steel strip/plate by using the air knife comprises a rolling process, a hot dipping process, an air knife process and a surface treatment process, and is characterized in that: in the hot dipping process, the plating solution comprises the following components in percentage by weight: 1.0-2.8% of Al, Mg: 0.8-1.5 percent of zinc and inevitable impurities as the rest, and the temperature of the plating solution is 420-480 ℃; in the air knife process, an air knife is adopted, and the weight of a coating is controlled to be 60-230 g/m2The distance between the air knife and the strip steel is 4-10 mm, the pressure of the air knife is 40-270 mbar, and the height of the air knife is 140-280 mm.
2. A method of producing high surface quality zinc aluminium magnesium coated steel strip/sheet using an air knife according to claim 1 characterised by: the hot dip coating process also comprises an annealing process before the hot dip coating process, wherein a nitrogen-hydrogen protective atmosphere is adopted in a preheating section, a heating section, a soaking section and a cooling section of the annealing furnace, wherein the volume percentage of hydrogen concentration is 2.5-5%, and the volume percentage of hydrogen concentration in a balancing section is 15-30%.
3. A method of producing high surface quality zinc aluminium magnesium coated steel strip/sheet using an air knife according to claim 2 characterised in that: in the hot dip coating process, the temperature of strip steel entering a zinc pot is 470-520 ℃.
4. A method of producing high surface quality zinc aluminium magnesium coated steel strip/sheet using an air knife according to claim 1 characterised by: in the air knife process, the distance between an air knife and strip steel is 4-6 mm, the pressure of the air knife is 40-190 mbar, and the height of the air knife is 140-220 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772202.8A CN113481455A (en) | 2021-07-08 | 2021-07-08 | Method for producing high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using air knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772202.8A CN113481455A (en) | 2021-07-08 | 2021-07-08 | Method for producing high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using air knife |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113481455A true CN113481455A (en) | 2021-10-08 |
Family
ID=77938016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110772202.8A Pending CN113481455A (en) | 2021-07-08 | 2021-07-08 | Method for producing high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using air knife |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113481455A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107866A (en) * | 2021-11-30 | 2022-03-01 | 马鞍山钢铁股份有限公司 | Production method for eliminating surface black spot defect of thick-specification thick-coating coated steel plate and thick-specification thick-coating coated steel plate |
| CN114369781A (en) * | 2021-12-03 | 2022-04-19 | 唐山钢铁集团高强汽车板有限公司 | Hot dip coating method for zinc-aluminum-magnesium coating strip steel |
| CN114635101A (en) * | 2022-02-16 | 2022-06-17 | 唐山钢铁集团有限责任公司 | Production method of zinc-aluminum-magnesium coated steel plate |
| CN114635101B (en) * | 2022-02-16 | 2024-06-28 | 唐山钢铁集团有限责任公司 | Production method of zinc-aluminum-magnesium coated steel plate |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030017111A (en) * | 2001-08-24 | 2003-03-03 | 주식회사 포스코 | Apparatus for controlling distance of an air knife in continuous galvanizing line |
| US20090297881A1 (en) * | 2004-06-29 | 2009-12-03 | Corus Staal Bv | Steel sheet with hot dip galvanized zinc alloy coating and process to produce it |
| CN101914742A (en) * | 2010-08-16 | 2010-12-15 | 攀钢集团钢铁钒钛股份有限公司 | Technology for producing strip steel continuous hot-dip galvanized thin coating |
| CN103397290A (en) * | 2013-08-01 | 2013-11-20 | 首钢总公司 | Method for eliminating black transverse striation defects on surface of zinc-plated sheet |
| CN103966537A (en) * | 2014-04-21 | 2014-08-06 | 鞍钢股份有限公司 | Method for controlling zinc flow ripples of heavy-weight material and thick-coating hot-galvanizing products |
| CN104060165A (en) * | 2014-01-22 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dipped aluminum-zinc alloy steel plate and manufacturing method thereof |
| CN105908089A (en) * | 2016-06-28 | 2016-08-31 | 宝山钢铁股份有限公司 | Low-density hot-dipped steel and manufacturing method thereof |
| CN106521391A (en) * | 2016-11-16 | 2017-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of hot dip aluminum-zinc plate with uniform spangles |
| KR101758715B1 (en) * | 2017-01-04 | 2017-07-19 | 동국제강주식회사 | Method for producing zinc-aluminum alloy-coated steel sheet with corrosion resistance |
| CN107109609A (en) * | 2015-01-08 | 2017-08-29 | 杰富意钢铁株式会社 | The manufacture method of alloyed hot-dip galvanized steel plate |
| CN107557711A (en) * | 2017-09-15 | 2018-01-09 | 首钢京唐钢铁联合有限责任公司 | A kind of method for avoiding galvanized steel surface from zinc flow liner occur |
| CN107574395A (en) * | 2017-09-04 | 2018-01-12 | 北京首钢冷轧薄板有限公司 | A kind of method and device for eliminating zinc flow liner |
| CN109234571A (en) * | 2018-11-09 | 2019-01-18 | 鞍钢股份有限公司 | A kind of stanniferous band spangle zinc-aluminum-magnesium clad steel sheet and galvanized method |
| CN109402546A (en) * | 2018-11-16 | 2019-03-01 | 唐山钢铁集团有限责任公司 | A kind of continuous zinc coating production method for the high-strength steel preventing coating plating leakage |
| CN109563605A (en) * | 2016-07-20 | 2019-04-02 | 塔塔钢铁艾默伊登有限责任公司 | The method of offer ZN-AL-MG coating and this coating |
| CN110423971A (en) * | 2019-08-14 | 2019-11-08 | 马鞍山钢铁股份有限公司 | A kind of welding performance and the hot-dip galvanized steel sheet of excellent corrosion-proof performance and preparation method thereof |
| CN110691865A (en) * | 2017-05-25 | 2020-01-14 | 塔塔钢铁艾默伊登有限责任公司 | Method for manufacturing a continuous hot dip coated steel strip and a hot dip coated steel sheet |
| JP6638872B1 (en) * | 2018-08-22 | 2020-01-29 | Ｊｆｅスチール株式会社 | Method for producing hot-dip coated steel strip and continuous hot-dip metal plating equipment |
| CN111270182A (en) * | 2020-03-20 | 2020-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip Zn-Al-Mg alloy coated steel plate and preparation method thereof |
| CN111719103A (en) * | 2020-07-03 | 2020-09-29 | 攀钢集团攀枝花钢钒有限公司 | Control method for spangles on surface of continuous hot-dip galvanized aluminum-silicon alloy coated steel plate/strip |
-
2021
- 2021-07-08 CN CN202110772202.8A patent/CN113481455A/en active Pending
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030017111A (en) * | 2001-08-24 | 2003-03-03 | 주식회사 포스코 | Apparatus for controlling distance of an air knife in continuous galvanizing line |
| US20090297881A1 (en) * | 2004-06-29 | 2009-12-03 | Corus Staal Bv | Steel sheet with hot dip galvanized zinc alloy coating and process to produce it |
| CN103320738A (en) * | 2004-06-29 | 2013-09-25 | 塔塔钢铁艾默伊登有限责任公司 | Steel sheet with hot dip galvanized zinc alloy coating and process to produce it |
| CN101914742A (en) * | 2010-08-16 | 2010-12-15 | 攀钢集团钢铁钒钛股份有限公司 | Technology for producing strip steel continuous hot-dip galvanized thin coating |
| CN103397290A (en) * | 2013-08-01 | 2013-11-20 | 首钢总公司 | Method for eliminating black transverse striation defects on surface of zinc-plated sheet |
| CN104060165A (en) * | 2014-01-22 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dipped aluminum-zinc alloy steel plate and manufacturing method thereof |
| CN103966537A (en) * | 2014-04-21 | 2014-08-06 | 鞍钢股份有限公司 | Method for controlling zinc flow ripples of heavy-weight material and thick-coating hot-galvanizing products |
| CN107109609A (en) * | 2015-01-08 | 2017-08-29 | 杰富意钢铁株式会社 | The manufacture method of alloyed hot-dip galvanized steel plate |
| CN105908089A (en) * | 2016-06-28 | 2016-08-31 | 宝山钢铁股份有限公司 | Low-density hot-dipped steel and manufacturing method thereof |
| CN109563605A (en) * | 2016-07-20 | 2019-04-02 | 塔塔钢铁艾默伊登有限责任公司 | The method of offer ZN-AL-MG coating and this coating |
| CN106521391A (en) * | 2016-11-16 | 2017-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of hot dip aluminum-zinc plate with uniform spangles |
| KR101758715B1 (en) * | 2017-01-04 | 2017-07-19 | 동국제강주식회사 | Method for producing zinc-aluminum alloy-coated steel sheet with corrosion resistance |
| US20200173003A1 (en) * | 2017-05-25 | 2020-06-04 | Tata Steel Ijmuiden B.V. | Method of manufacturing a continuous hot dip coated steel strip and hot dip coated steel sheet |
| CN110691865A (en) * | 2017-05-25 | 2020-01-14 | 塔塔钢铁艾默伊登有限责任公司 | Method for manufacturing a continuous hot dip coated steel strip and a hot dip coated steel sheet |
| CN107574395A (en) * | 2017-09-04 | 2018-01-12 | 北京首钢冷轧薄板有限公司 | A kind of method and device for eliminating zinc flow liner |
| CN107557711A (en) * | 2017-09-15 | 2018-01-09 | 首钢京唐钢铁联合有限责任公司 | A kind of method for avoiding galvanized steel surface from zinc flow liner occur |
| JP6638872B1 (en) * | 2018-08-22 | 2020-01-29 | Ｊｆｅスチール株式会社 | Method for producing hot-dip coated steel strip and continuous hot-dip metal plating equipment |
| CN109234571A (en) * | 2018-11-09 | 2019-01-18 | 鞍钢股份有限公司 | A kind of stanniferous band spangle zinc-aluminum-magnesium clad steel sheet and galvanized method |
| CN109402546A (en) * | 2018-11-16 | 2019-03-01 | 唐山钢铁集团有限责任公司 | A kind of continuous zinc coating production method for the high-strength steel preventing coating plating leakage |
| CN110423971A (en) * | 2019-08-14 | 2019-11-08 | 马鞍山钢铁股份有限公司 | A kind of welding performance and the hot-dip galvanized steel sheet of excellent corrosion-proof performance and preparation method thereof |
| CN111270182A (en) * | 2020-03-20 | 2020-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip Zn-Al-Mg alloy coated steel plate and preparation method thereof |
| CN111719103A (en) * | 2020-07-03 | 2020-09-29 | 攀钢集团攀枝花钢钒有限公司 | Control method for spangles on surface of continuous hot-dip galvanized aluminum-silicon alloy coated steel plate/strip |
Non-Patent Citations (1)
| Title |
|---|
| 孙康宁等: "《现代工程材料成形与制造工艺基础》", 机械工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107866A (en) * | 2021-11-30 | 2022-03-01 | 马鞍山钢铁股份有限公司 | Production method for eliminating surface black spot defect of thick-specification thick-coating coated steel plate and thick-specification thick-coating coated steel plate |
| CN114107866B (en) * | 2021-11-30 | 2023-08-29 | 马鞍山钢铁股份有限公司 | Production method for eliminating black spot defect on surface of thick-gauge thick-coating coated steel plate and thick-gauge thick-coating coated steel plate |
| CN114369781A (en) * | 2021-12-03 | 2022-04-19 | 唐山钢铁集团高强汽车板有限公司 | Hot dip coating method for zinc-aluminum-magnesium coating strip steel |
| CN114635101A (en) * | 2022-02-16 | 2022-06-17 | 唐山钢铁集团有限责任公司 | Production method of zinc-aluminum-magnesium coated steel plate |
| CN114635101B (en) * | 2022-02-16 | 2024-06-28 | 唐山钢铁集团有限责任公司 | Production method of zinc-aluminum-magnesium coated steel plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105970105B (en) | Ultra-deep punching hot dip aluminum zinc plate/band and preparation method thereof | |
| CN104419867B (en) | 1250MPa level superelevation strong zinc-aluminum-magnesium clad steel sheet and production method thereof | |
| JP4786769B2 (en) | Alloyed hot-dip galvanized steel sheet and method for producing the same | |
| CN104060165B (en) | A kind of hot-dip coating aluminium-zinc alloy steel plate and preparation method thereof | |
| CN110863137B (en) | Method for manufacturing hot-dip aluminum-zinc steel plate | |
| JP5799819B2 (en) | Method for producing hot-dip galvanized steel sheet with excellent plating wettability and pick-up resistance | |
| CN104264041A (en) | High-strength low-alloy hot-dip aluminized and galvanized steel strip and production method thereof | |
| CN103911551B (en) | A kind of hot-dip coating aluminium-zinc alloy steel plate and preparation method thereof | |
| CN110273121B (en) | Zinc-aluminum-magnesium coated steel strip and preparation method thereof | |
| JP2008214681A (en) | Galvannealed steel sheet superior in image clarity of coating and press formability, and manufacturing method therefor | |
| CN114107866B (en) | Production method for eliminating black spot defect on surface of thick-gauge thick-coating coated steel plate and thick-gauge thick-coating coated steel plate | |
| CN113481455A (en) | Method for producing high-surface-quality zinc-aluminum-magnesium coated steel strip/plate by using air knife | |
| CN110499485A (en) | A kind of alloying processing method preparing high anti-powdering hot dip galvanizing coating | |
| KR101707981B1 (en) | Method for manufacturing galvanized steel sheet | |
| JPH04254532A (en) | Manufacture of galvannealed steel sheet having excellent workability | |
| CN113502438B (en) | Zinc-aluminum-magnesium alloy coating steel plate/belt for stamping and preparation method thereof | |
| WO2023098125A1 (en) | Zinc-aluminum-magnesium alloy coated steel containing v and b and preparation method therefor | |
| CN112553522B (en) | Cold-rolled hot-dip aluminum-zinc plated steel plate with excellent bending performance and manufacturing method thereof | |
| CN106884119A (en) | A kind of manufacture method of thickness coating hot-dip galvanizing sheet steel | |
| CN112575276A (en) | Hot-dip zinc-aluminum-magnesium alloy coated steel plate for ultra-deep drawing and preparation method thereof | |
| CN111254374A (en) | Zinc-flower-free hot-dip galvanized sheet process | |
| CN112795859B (en) | Hot-formed steel plate coating, plating solution and hot dip plating method | |
| KR100356163B1 (en) | Manufacturing method of semi-alloyed hot dip galvanized steel sheet | |
| CN113755773B (en) | Control method for surface quality of thick-specification thick-coating zinc-aluminum-magnesium strip steel | |
| CN116356241A (en) | Method for eliminating surface ripple defect of aluminum-zinc-plated steel coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211008 |