CN111254374A - Zinc-flower-free hot-dip galvanized sheet process - Google Patents
Zinc-flower-free hot-dip galvanized sheet process Download PDFInfo
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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
- C23C2/04—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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- C23C2/40—Plates; Strips
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Abstract
The invention discloses a hot-dip galvanized sheet process without zinc bloom, which belongs to the technical field of steel and is characterized in that: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, finishing, passivation and coiling by an acid plating continuous production line to form the hot-galvanized coil. Compared with the prior art, the plating layer has excellent binding force and good surface quality.
Description
Technical Field
The invention relates to the technical field of steel, in particular to a zinc flower-free hot-dip galvanized plate process.
Background
According to the continuous galvanizing of steel plates in China, 13 steel plates in 2000 are started, the productivity is 230 million tons, and through rapid development, 640 steel plates in a hot galvanizing steel plate production line are built in China until 2018 years later, and the annual productivity reaches more than 1 hundred million tons. The production line can produce 25 hot-base galvanized plates, and the capacity is 1000 ten thousand tons. At present, the production processes of conventional G350, S390GD + Z and SS40 hot-dip galvanized plates are divided into two types, namely hot-base galvanizing (more than 2.3mm in the conventional process) and cold-base galvanizing (less than 2.3mm in the conventional process), wherein the hot-base galvanizing is a flower product, and has the defects of limited thin specification, poor dimensional accuracy, large performance fluctuation and the like; the cold base product needs to be processed by cold rolling and annealing procedures, the process flow is complex, the cost is high, and great difficulty exists in the aspect of thick specification production.
Disclosure of Invention
The technical task of the invention is to provide a zinc flower-free hot-dip galvanized sheet process aiming at the defects of the prior art.
The technical scheme for solving the technical problem is as follows: a process for producing G350 zinc-free hot-galvanized plates based on hot-rolled substrates is characterized by comprising the following steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivation and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the product is 1.2-4.0mm, the weight of a coating is 60-275 g/square meter, and two surfaces of the coating are coated with equal thickness; the raw material roll comprises the following components in parts by weight: c: 0.040% -0.060%, Si: 0.15% -0.25%, Mn: 1.50% -1.60%, P is less than or equal to 0.017%, S is less than or equal to 0.005%, Als (acid-soluble aluminum): 0.020% -0.040%, Ti: 0.020-0.040% and N is less than or equal to 0.0050%.
In the acid washing process, the HCl content of the acid tank is as follows: 40-70g/L, acid washing temperature: 70-85 ℃; in the heating process of the acid plating continuous production line, the temperature of a soaking section of a radiation pipe in an induction heating furnace is 500-520 ℃, the temperature of a spraying air cooling section is 500-510 ℃, and the temperature of a pot is 470-480 ℃; in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -45 ℃ or below, oven pressure: 0.5-1.0mbar, 5-8% hydrogen content.
The zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.20 +/-0.05%, Sb less than or equal to 0.02%, Fe less than or equal to 0.03%, others less than or equal to 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃; the leveling process adopts double leveling arrangement, wherein the leveling elongation at the front of the furnace is 0.8-1.2%, and the polishing elongation at the back of the furnace is 0.8-1.3%; and chromic acid passivation or oil coating treatment is carried out in the finishing and passivation process.
A process for producing S390GD + Z zinc flower-free hot-dip galvanized sheet based on hot-rolled base plates is characterized by comprising the following steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivation and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the product is 1.0-4.0mm, the weight of a coating is 60-275 g/square meter, and two surfaces of the coating are coated with equal thickness; the raw material roll comprises the following components in parts by weight: c: 0.040% -0.060%, Si: 0.20% -0.30%, Mn: 0.60% -1.00%, P is less than or equal to 0.015%, S is less than or equal to 0.005%, Als (acid-soluble aluminum): 0.020% -0.040%, Ti: 0.020-0.040% and N is less than or equal to 0.0050%.
In the acid washing process, the HCl content of the acid tank is as follows: 40-70g/L, acid washing temperature: 70-85 ℃; the temperature of a soaking section of a radiation pipe in the induction heating furnace is 500-520 ℃, the temperature of a spraying air cooling section is 500-510 ℃, and the temperature of a pot is 470-480 ℃; in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -45 ℃ or below, oven pressure: 0.5-1.0mbar, 5-8% hydrogen content.
The zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.20 +/-0.05%, Sb less than or equal to 0.02%, Fe less than or equal to 0.03%, others less than or equal to 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃; the leveling process adopts double leveling arrangement, wherein the leveling elongation at the front of the furnace is 0.8-1.2%, and the polishing elongation at the back of the furnace is 0.8-1.3%; and chromic acid passivation or oil coating treatment is carried out in the finishing and passivation process.
A process for producing SS40 hot-base non-spangle hot-dip galvanized sheet based on acid plating continuous production line is characterized in that: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivation and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the product is 1.0-4.0mm, the weight of a coating is 60-275 g/square meter, and two surfaces of the coating are coated with equal thickness; the raw material roll comprises the following components in parts by weight: c: 0.040% -0.050%, Si: 0.15% -0.25%, Mn: 0.50% -0.60%, P is less than or equal to 0.015%, S is less than or equal to 0.003%, Als (acid soluble aluminum): 0.020-0.030% and N less than or equal to 0.0050%.
In the acid washing process, the HCl content of the acid tank is as follows: 50-80g/L, acid washing temperature: 70-85 ℃; in the heating process of the acid plating continuous production line, the temperature of a soaking section of a radiation pipe in the heating of an induction heating furnace is 500-; in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -35 ℃ or below, oven pressure: 0.4-1.0mbar, hydrogen content > 5%.
The zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.25 +/-0.05%, Sb not more than 0.02%, Fe not more than 0.03%, others not more than 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃; setting leveling and finishing parameters, wherein the leveling elongation before galvanization is 0.9-1.2%, and the finishing elongation after galvanization is 1.0-1.4%; chromic acid passivation or oil coating treatment is carried out in the surface treatment process after plating.
Compared with the prior art, the invention has the following outstanding beneficial effects:
1. the invention provides a brand new method for producing hot-base floret-free G350, S390GD + Z and SS40 by an acid plating continuous production line, the product surface quality is good, the product performance and the size deviation are stable, and the plating layer bonding force is excellent.
2. Compared with the traditional cold-base galvanizing production process, the invention omits the processes of rolling thin materials by a rolling mill, secondary welding, degreasing and annealing heating, can shorten the process flow, save energy, reduce the cost per ton of steel by about 300 plus 500 yuan, and has considerable social and economic benefits.
Drawings
FIG. 1 is a surface picture of a G350 galvanized sheet obtained by the invention.
FIG. 2 is a surface picture of a G350 galvanized sheet obtained by the present invention.
Fig. 3 is a metallographic structure photograph, product type: g350, thickness of 2.3mm, weight of 80G/square meter.
Fig. 4 is a metallographic structure photograph, product type: g350, thickness of 2.3mm, weight of 80G/square meter.
FIG. 5 is a surface picture of the S390GD + Z galvanized sheet obtained by the present invention.
FIG. 6 is a surface picture of the S390GD + Z galvanized sheet obtained by the present invention.
Fig. 7 is a metallographic structure photograph, product type: s390GD + Z, thickness of 1.8mm, weight of 275 g/square meter.
Fig. 8 is a metallographic structure photograph, product type: s390GD + Z, thickness of 1.8mm, weight of 275 g/square meter.
Fig. 9 is a surface picture of the SS40 galvanized sheet obtained in the present invention.
Fig. 10 is a surface picture of the SS40 galvanized sheet obtained in the present invention.
FIG. 11 shows a photograph of a combination of zinc layers scanned by an electron microscope, the product types: SS40, thickness of 1.6mm, weight of 120 g/square meter.
Fig. 12 is a metallographic structure photograph, product type: SS40, thickness of 1.6mm, weight of 120 g/square meter.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
A process for producing G350 zinc-flower-free hot-galvanized plates based on hot-rolled substrates comprises the following process steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, leveling, passivating and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the hot-galvanized coil is 1.2-4.0mm, the weight of a coating is 60-275 g/square meter, and the two surfaces of the hot-galvanized coil are coated with coatings with equal thickness. The raw material roll comprises the following components in parts by weight: 0.040% -0.060%, Si: 0.15% -0.25%, Mn: 1.50% -1.60%, P is less than or equal to 0.017%, S is less than or equal to 0.005%, Als (acid-soluble aluminum): 0.020% -0.040%, Ti: 0.020-0.040% and N is less than or equal to 0.0050%.
Preferably, in the acid washing process, the content of HCl in an acid tank is as follows: 40-70g/L, acid washing temperature: 70-85 ℃. The temperature of the soaking section of the radiant tube is 500-520 ℃, the temperature of the spraying air cooling section is 500-510 ℃, and the temperature of the entering section is 470-480 ℃. In the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -45 ℃ or below, oven pressure: 0.5-1.0mbar, 5-8% hydrogen content.
Preferably, the zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.20 +/-0.05%, Sb less than or equal to 0.02%, Fe less than or equal to 0.03%, others less than or equal to 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃.
The leveling process adopts double leveling setting: in example 1, the furnace front leveling elongation was 1.0% and the furnace rear leveling elongation was 1.06%. In example 2, the stokehole leveling elongation was 0.99%, and the stokehole leveling elongation was 1.25%. In example 3, the stokehole leveling elongation was 0.88% and the stokehole leveling elongation was 0.96%.
Preferably, the polishing and passivation process is carried out with chromic acid passivation or oil coating.
TABLE 1 Properties of G350-galvanized sheets obtained according to the invention
The standard requires that: the yield strength is more than or equal to 350MPa, the tensile strength is more than or equal to 420MPa, and the elongation is more than or equal to 14 percent.
A method for producing S390GD + Z zinc flower-free hot-dip galvanized sheets based on hot-rolled substrates comprises the following process steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, leveling, passivating and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the hot-galvanized coil is 1.0-4.0mm, the weight of a coating is 60-275 g/square meter, and the two surfaces of the hot-galvanized coil are coated with coatings with equal thickness.
Preferably, the raw material roll comprises the following components in parts by weight: c: 0.040% -0.060%, Si: 0.20% -0.30%, Mn: 0.60% -1.00%, P is less than or equal to 0.015%, S is less than or equal to 0.005%, Als (acid-soluble aluminum): 0.020% -0.040%, Ti: 0.020-0.040% and N is less than or equal to 0.0050%.
Preferably, in the acid washing process, the content of HCl in an acid tank is as follows: 40-70g/L, acid washing temperature: 70-85 ℃.
Preferably, when the thickness of the product is 1.0-4.0mm, the temperature of the soaking section of the radiation tube is 500-.
Preferably, in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -45 ℃ or below, oven pressure: 0.5-1.0mbar, 5-8% hydrogen content.
Preferably, the zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.20 +/-0.05%, Sb less than or equal to 0.02%, Fe less than or equal to 0.03%, others less than or equal to 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃.
Preferably, the leveling process adopts a double leveling setting: in example 1, the before-furnace leveling elongation is 1.2%, and the after-furnace leveling elongation is 1.3%; in example 2, the pre-furnace leveling elongation is 1.1%, and the post-furnace leveling elongation is 1.2. In example 3, the pre-furnace leveling elongation was 0.8% and the post-furnace leveling elongation was 1.3%.
Preferably, the polishing and passivating process is carried out by chromic acid passivation or oil coating.
TABLE 2 product Properties of S390GD + Z galvanized sheet obtained according to the invention
The standard requires that: the yield strength is more than or equal to 390, the tensile strength is more than or equal to 460MPa, and the elongation is more than or equal to 16.
A method for producing SS40 hot-based spangless hot-dip galvanized sheet based on an acid plating continuous production line comprises the following process steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivating and coiling by a continuous acid plating production line to form a hot-galvanized coil, wherein the thickness of the hot-galvanized coil is 1.2mm, the weight of a coating is 80 g/square meter, and double surfaces of the hot-galvanized coil are coated with coatings with equal thickness.
Preferably, the raw material roll comprises the following components in parts by weight: c: 0.040% -0.050%, Si: 0.15% -0.25%, Mn: 0.50% -0.60%, P is less than or equal to 0.015%, S is less than or equal to 0.003%, Als (acid soluble aluminum): 0.020-0.030% and N less than or equal to 0.0050%.
Preferably, in the acid washing process, the content of HCl in an acid tank is as follows: 50-80g/L, acid washing temperature: 70-85 ℃.
Preferably, when the thickness of the product is 1.0-4.0mm, the temperature of the heat equalizing section of the radiation pipe is 500-.
Preferably, in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -35 ℃ or below, oven pressure: 0.4-1.0mbar, hydrogen content > 5%.
Preferably, the zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.25 +/-0.05%, Sb not more than 0.02%, Fe not more than 0.03%, others not more than 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃.
Preferably, the leveling and finishing parameters are set as follows: in example 1, the temper rolling elongation before galvanization was 1.0%, and the temper rolling elongation after galvanization was 1.3%. In example 2, the temper rolling elongation before galvanization was 0.9%, and the temper rolling elongation after galvanization was 1.4%. In example 3, the temper rolling elongation before galvanization was 1.1%, and the temper rolling elongation after galvanization was 1.3%.
Preferably, the surface treatment process after plating is carried out with chromic acid passivation or oil coating.
TABLE 3 product Properties of SS40 galvanized sheet obtained according to the invention
The standard requires that: the yield strength is more than or equal to 275, the tensile strength is more than or equal to 380MPa, and the elongation is more than or equal to 16.
It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A process for producing G350 zinc-free hot-galvanized plates based on hot-rolled substrates is characterized by comprising the following steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivation and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the product is 1.2-4.0mm, the weight of a coating is 60-275 g/square meter, and two surfaces of the coating are coated with equal thickness; the raw material roll comprises the following components in parts by weight: c: 0.040% -0.060%, Si: 0.15% -0.25%, Mn: 1.50-1.60%, P is less than or equal to 0.017%, S is less than or equal to 0.005%, Als: 0.020% -0.040%, Ti: 0.020-0.040% and N is less than or equal to 0.0050%.
2. The process of claim 1 for producing G350 a hot-galvanized sheet free of spangles based on hot-rolled substrates, wherein: in the acid washing process, the HCl content of an acid tank is as follows: 40-70g/L, acid washing temperature: 70-85 ℃; in the heating process of the acid plating continuous production line, the temperature of a soaking section of a radiation pipe in an induction heating furnace is 500-520 ℃, the temperature of a spraying air cooling section is 500-510 ℃, and the temperature of a pot is 470-480 ℃; in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -45 ℃ or below, oven pressure: 0.5-1.0mbar, 5-8% hydrogen content.
3. The process of claim 1 for producing G350 a hot-galvanized sheet free of spangles based on hot-rolled substrates, wherein: the zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.20 +/-0.05%, Sb less than or equal to 0.02%, Fe less than or equal to 0.03%, others less than or equal to 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃; the leveling process adopts double leveling arrangement, wherein the leveling elongation at the front of the furnace is 0.8-1.2%, and the polishing elongation at the back of the furnace is 0.8-1.3%; and chromic acid passivation or oil coating treatment is carried out in the finishing and passivation process.
4. A process for producing S390GD + Z zinc flower-free hot-dip galvanized sheet based on hot-rolled base plates is characterized by comprising the following steps: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivation and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the product is 1.0-4.0mm, the weight of a coating is 60-275 g/square meter, and two surfaces of the coating are coated with equal thickness; the raw material roll comprises the following components in parts by weight: c: 0.040% -0.060%, Si: 0.20% -0.30%, Mn: 0.60-1.00%, P is less than or equal to 0.015%, S is less than or equal to 0.005%, Als: 0.020% -0.040%, Ti: 0.020-0.040% and N is less than or equal to 0.0050%.
5. The process of claim 4 for producing S390GD + Z zinc free hot galvanized sheet based on hot rolled substrate, wherein: in the acid washing process, the HCl content of an acid tank is as follows: 40-70g/L, acid washing temperature: 70-85 ℃; the temperature of a soaking section of a radiation pipe in the induction heating furnace is 500-520 ℃, the temperature of a spraying air cooling section is 500-510 ℃, and the temperature of a pot is 470-480 ℃; in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -45 ℃ or below, oven pressure: 0.5-1.0mbar, 5-8% hydrogen content.
6. The process of claim 4 for producing S390GD + Z zinc free hot galvanized sheet based on hot rolled substrate, wherein: the zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.20 +/-0.05%, Sb less than or equal to 0.02%, Fe less than or equal to 0.03%, others less than or equal to 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃; the leveling process adopts double leveling arrangement, wherein the leveling elongation at the front of the furnace is 0.8-1.2%, and the polishing elongation at the back of the furnace is 0.8-1.3%; and chromic acid passivation or oil coating treatment is carried out in the finishing and passivation process.
7. A process for producing SS40 hot-base non-spangle hot-dip galvanized sheet based on acid plating continuous production line is characterized in that: the hot-rolled coil is subjected to acid pickling, leveling, heating, galvanizing, smoothing, passivation and coiling by an acid plating continuous production line to form a hot-galvanized coil, wherein the thickness of the product is 1.0-4.0mm, the weight of a coating is 60-275 g/square meter, and two surfaces of the coating are coated with equal thickness; the raw material roll comprises the following components in parts by weight: c: 0.040% -0.050%, Si: 0.15% -0.25%, Mn: 0.50-0.60%, P is less than or equal to 0.015%, S is less than or equal to 0.003%, Als: 0.020-0.030% and N less than or equal to 0.0050%.
8. The process for producing SS40 hot-based non-spangle hot-dip galvanized sheet based on acid plating continuous production line according to claim 7, wherein the process comprises the following steps: in the acid washing process, the HCl content of an acid tank is as follows: 50-80g/L, acid washing temperature: 70-85 ℃; in the heating process of the acid plating continuous production line, the temperature of a soaking section of a radiation pipe in the heating of an induction heating furnace is 500-; in the heating process of the acid plating continuous production line, the dew point of an induction heating furnace is as follows: -35 ℃ or below, oven pressure: 0.4-1.0mbar, hydrogen content > 5%.
9. The process for producing SS40 hot-based non-spangle hot-dip galvanized sheet based on acid plating continuous production line according to claim 7, wherein the process comprises the following steps: the zinc liquid in the zinc pot in the galvanizing process comprises the following components: zn is more than 99 percent, Al: 0.25 +/-0.05%, Sb not more than 0.02%, Fe not more than 0.03%, others not more than 0.015%, zinc liquid temperature: 465 ℃ plus or minus 5 ℃; setting leveling and finishing parameters, wherein the leveling elongation before galvanization is 0.9-1.2%, and the finishing elongation after galvanization is 1.0-1.4%; chromic acid passivation or oil coating treatment is carried out in the surface treatment process after plating.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195401A (en) * | 2020-09-25 | 2021-01-08 | 河钢股份有限公司承德分公司 | Production method of super-thick zinc layer hot-dip galvanized steel coil |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060076214A (en) * | 2004-12-28 | 2006-07-04 | 주식회사 포스코 | Galvanized steel-sheet without spangle, manufacturing method thereof and device used therefor |
| CN101760694A (en) * | 2009-12-17 | 2010-06-30 | 河北钢铁股份有限公司 | Heat-based high-strength galvanized plate and method for producing same |
| CN104831207A (en) * | 2015-04-16 | 2015-08-12 | 河北钢铁股份有限公司邯郸分公司 | Thin gauge 600MPa grade hot galvanized plate production method |
| CN108149180A (en) * | 2017-12-21 | 2018-06-12 | 日照钢铁控股集团有限公司 | A kind of production method of SGH490 heat zinc coating plates |
| CN108823507A (en) * | 2018-06-28 | 2018-11-16 | 武汉钢铁有限公司 | A kind of tensile strength 800MPa grades of hot-dip galvanized high-strength steels and its minimizing production method |
| CN108950382A (en) * | 2018-06-25 | 2018-12-07 | 日照钢铁控股集团有限公司 | A method of continuous producing line production hot radical is plated without flower galvanized sheet based on output strip line without a head and acid |
-
2020
- 2020-03-31 CN CN202010246403.XA patent/CN111254374A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060076214A (en) * | 2004-12-28 | 2006-07-04 | 주식회사 포스코 | Galvanized steel-sheet without spangle, manufacturing method thereof and device used therefor |
| CN101760694A (en) * | 2009-12-17 | 2010-06-30 | 河北钢铁股份有限公司 | Heat-based high-strength galvanized plate and method for producing same |
| CN104831207A (en) * | 2015-04-16 | 2015-08-12 | 河北钢铁股份有限公司邯郸分公司 | Thin gauge 600MPa grade hot galvanized plate production method |
| CN108149180A (en) * | 2017-12-21 | 2018-06-12 | 日照钢铁控股集团有限公司 | A kind of production method of SGH490 heat zinc coating plates |
| CN108950382A (en) * | 2018-06-25 | 2018-12-07 | 日照钢铁控股集团有限公司 | A method of continuous producing line production hot radical is plated without flower galvanized sheet based on output strip line without a head and acid |
| CN108823507A (en) * | 2018-06-28 | 2018-11-16 | 武汉钢铁有限公司 | A kind of tensile strength 800MPa grades of hot-dip galvanized high-strength steels and its minimizing production method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195401A (en) * | 2020-09-25 | 2021-01-08 | 河钢股份有限公司承德分公司 | Production method of super-thick zinc layer hot-dip galvanized steel coil |
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