CN112322968A - Thermal-base non-flower high-strength galvanized plate for photovoltaic support and preparation process thereof - Google Patents
Thermal-base non-flower high-strength galvanized plate for photovoltaic support and preparation process thereof Download PDFInfo
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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
- 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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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
- C22C38/04—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
- 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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to the technical field of steel smelting, in particular to a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket and a preparation process thereof. The hot-base non-flower high-strength galvanized sheet comprises the following chemical components in percentage by weight: 0.038-0.050% of C, 0.15-0.25% of Si, 0.50-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.020-0.030% of Als and the balance of iron. The invention optimizes the component proportion of the hot-base non-flower high-strength galvanized sheet, has good surface quality of the product of the continuous pickling galvanizing process, stable product performance and dimensional deviation, excellent coating binding force and good forming effect, shortens the process flow, saves energy and reduces the cost.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket and a preparation process thereof.
Background
In recent years, the photovoltaic industry has a high-speed development trend, and the number of upstream photovoltaic equipment matching manufacturers is continuously increased. Manufacturers of photovoltaic power generation systems seek qualified support manufacturers worldwide. At present, domestic photovoltaic bracket products are mainly processed for American generations, and the annual galvanizing amount is 50 ten thousand tons. The requirements on the material are as follows: the product needs to ensure that the yield strength is in the range of 330-395 mpa, and the punching depth reaches 90 mm. The requirements on the material are very strict. At present, only the material of the Handrail and Zong cold bearing SGC440 figured galvanized sheet can be stably produced in China, the production cost is high, the production process is realized by adding more Mn iron (0.88%) during steel making, and then performing the procedures of cold rolling, annealing and the like, and the hot-base figureless high-strength steel product cannot meet the production index requirements of the industry all the time due to the reasons of performance and surface quality.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the hot-base non-flower high-strength galvanized plate for the photovoltaic bracket and the preparation process thereof.
The technical scheme of the invention is as follows:
the thermal-base non-flower high-strength galvanized sheet for the photovoltaic bracket is characterized by comprising the following chemical components in percentage by weight: 0.038-0.050% of C, 0.15-0.25% of Si, 0.50-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.020-0.030% of Als and the balance of iron.
Preferably, the hot-base high-strength and non-flower galvanized sheet comprises the following chemical components in percentage by weight: 0.045% of C, 0.20% of Si, 0.55% of Mn, less than or equal to 0.010% of P, less than or equal to 0.002% of S, 0.025% of Als and the balance of iron.
Preferably, the thickness of the hot-base non-flower high-strength galvanized plate is 1.0-2.0mm, and the coating weight of the hot-base non-flower high-strength galvanized plate is 60g/m2-600g/m2。
Preferably, the plating layer of the heat-based high-strength non-flower galvanized sheet is a double-sided equal-thickness plating layer.
A preparation process of a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket is characterized by comprising the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.038-0.050% of C, 0.15-0.25% of Si, 0.50-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.020-0.030% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil to obtain a hot-galvanized coil.
Preferably, the continuous pickling galvanizing process comprises the steps of pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot galvanizing coil.
Preferably, in the acid washing step, the content of HCL in the acid tank is: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
Preferably, in the heating step, the heating temperature conditions of the induction heating furnace are as follows: when the thickness of the product is 1.0-2.0mm, the temperature of the soaking section of the radiant tube is 500-520 ℃, the temperature of the air injection cooling section is 500-510 ℃, the temperature of the pan feeding is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5mbar-1.0mbar, and the hydrogen content is 5% -8%.
Preferably, the zinc liquid in the zinc pot in the galvanizing step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
Preferably, the leveling process adopts double leveling arrangement, wherein the leveling elongation rate in the front of the furnace is 0.8-1.2%, and the finishing elongation rate in the back of the furnace is 0.8-1.3%; and chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
In order to improve the forming performance of the material, improve the fluidity of the metal of the material during deformation, reduce the friction between the metal and a concave-convex die, reduce the stamping working temperature, improve the lubrication of the die, paint stretching oil and be beneficial to product forming. The size of the R angle of the formed die is adjusted, the round angle of the male die of the die is increased to 20-40 times of the thickness of a plate, and the subsequent shaping process is added, so that the requirements of the size and the pitch of the product are met. The R angle influences the flowability of the plate in the stamping process, and the product rejection rate is reduced from 15% to below 2% by optimizing the size of the R angle of the die, so that the requirement of terminal customers on the universality of the material is met.
The invention has the advantages of
The application provides a hot-base non-flower high-strength galvanized sheet for a photovoltaic bracket and a preparation process thereof, the hot-base non-flower high-strength galvanized sheet with the specification of 1.0-2.0mm can be stably produced and applied to the photovoltaic bracket industry, the surface quality of the product is good, the product performance and the dimensional deviation are stable, the coating bonding force is excellent, the forming effect is good, the yield strength of the product is in the range of 330mpa-395mpa, and the stamping depth reaches 90 mm. Compared with the traditional cold-base galvanizing production process, the process 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 200 plus 300 yuan, and has considerable social and economic benefits.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic view of the effect of the punched product of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation process of a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket is characterized by comprising the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.038% of C, 0.16% of Si, 0.50% of Mn, less than or equal to 0.010% of P, less than or equal to 0.002% of S, 0.020% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil, wherein the steps comprise pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot-galvanized coil.
The thickness of the hot-base non-flower high-strength galvanized plate is 1.0mm, and the coating weight of the hot-base non-flower high-strength galvanized plate is 100g/m2。
The plating layer of the hot-base non-flower high-strength galvanized sheet is a double-sided equal-thickness plating layer.
In the acid washing step, the content of HCL in an acid tank is as follows: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
In the heating step, the heating temperature condition of the induction heating furnace is as follows: the temperature of the soaking section of the radiant tube is 500-520 ℃, the temperature of the jet air cooling section is 500-510 ℃, the temperature of the pot entering is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5-1.0 mbar, and the hydrogen content is 5-8%.
The zinc liquid in the zinc pot in the galvanizing step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
The leveling process adopts double leveling arrangement, the leveling elongation at the front of the furnace is 0.8 percent, and the polishing elongation at the back of the furnace is 0.9 percent; chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
Example 2
A preparation process of a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket is characterized by comprising the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.045% of C, 0.20% of Si, 0.55% of Mn, less than or equal to 0.010% of P, less than or equal to 0.002% of S, 0.025% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil, wherein the steps comprise pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot-galvanized coil.
The thickness of the hot-base non-flower high-strength galvanized plate is 1.5mm, and the coating weight of the hot-base non-flower high-strength galvanized plate is 220g/m2。
The plating layer of the hot-base non-flower high-strength galvanized sheet is a double-sided equal-thickness plating layer.
In the acid washing step, the content of HCL in an acid tank is as follows: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
In the heating step, the heating temperature condition of the induction heating furnace is as follows: when the thickness of the product is 1.0-2.0mm, the temperature of the soaking section of the radiant tube is 500-520 ℃, the temperature of the air injection cooling section is 500-510 ℃, the temperature of the pan feeding is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5mbar-1.0mbar, and the hydrogen content is 5% -8%.
The zinc liquid in the zinc pot in the galvanizing step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
The leveling process adopts double leveling arrangement, wherein the leveling elongation at the front of the furnace is 1.0 percent, and the polishing elongation at the back of the furnace is 1.0 percent; chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
Example 3
A preparation process of a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket is characterized by comprising the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.042% of C, 021% of Si, 0.57% of Mn, less than or equal to 0.012% of P, less than or equal to 0.025% of S, 0.025% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil, wherein the steps comprise pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot-galvanized coil.
The thickness of the hot-base non-flower high-strength galvanized plate is 1.8mm, and the coating weight of the hot-base non-flower high-strength galvanized plate is 275g/m2。
The plating layer of the hot-base non-flower high-strength galvanized sheet is a double-sided equal-thickness plating layer.
In the acid washing step, the content of HCL in an acid tank is as follows: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
In the heating step, the heating temperature condition of the induction heating furnace is as follows: when the thickness of the product is 1.8mm, the temperature of the soaking section of the radiation pipe is 500-520 ℃, the temperature of the jet air cooling section is 500-510 ℃, the temperature of the pot inlet is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5mbar-1.0mbar, and the hydrogen content is 5% -8%.
The zinc liquid in the zinc pot in the galvanizing step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
The leveling process adopts double leveling arrangement, the leveling elongation at the front of the furnace is 0.1 percent, and the leveling elongation at the back of the furnace is 1.2 percent; chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
Example 3
A preparation process of a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket is characterized by comprising the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.042% of C, 021% of Si, 0.57% of Mn, less than or equal to 0.012% of P, less than or equal to 0.025% of S, 0.025% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil, wherein the steps comprise pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot-galvanized coil.
The thickness of the hot-base non-flower high-strength galvanized plate is 2.0mm, and the coating weight of the hot-base non-flower high-strength galvanized plate is 275g/m2。
The plating layer of the hot-base non-flower high-strength galvanized sheet is a double-sided equal-thickness plating layer.
In the acid washing step, the content of HCL in an acid tank is as follows: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
In the heating step, the heating temperature condition of the induction heating furnace is as follows: when the thickness of the product is 1.8mm, the temperature of the soaking section of the radiation pipe is 500-520 ℃, the temperature of the jet air cooling section is 500-510 ℃, the temperature of the pot inlet is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5mbar-1.0mbar, and the hydrogen content is 5% -8%.
The zinc liquid in the zinc pot in the galvanizing step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
The leveling process adopts double leveling arrangement, the leveling elongation at the front of the furnace is 0.1 percent, and the leveling elongation at the back of the furnace is 1.2 percent; chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
Example 5
A preparation process of a thermal-base non-flower high-strength galvanized plate for a photovoltaic bracket is characterized by comprising the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.050% of C, 0.25% of Si, 0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.030% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil, wherein the steps comprise pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot-galvanized coil.
The thickness of the hot-base non-flower high-strength galvanized plate is 2.0mm, and the coating weight of the hot-base non-flower high-strength galvanized plate is 550g/m2。
The plating layer of the hot-base non-flower high-strength galvanized sheet is a double-sided equal-thickness plating layer.
In the acid washing step, the content of HCL in an acid tank is as follows: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
In the heating step, the heating temperature condition of the induction heating furnace is as follows: when the thickness of the product is 2.0mm, the temperature of the soaking section of the radiation pipe is 500-520 ℃, the temperature of the jet air cooling section is 500-510 ℃, the temperature of the pot inlet is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5mbar-1.0mbar, and the hydrogen content is 5% -8%.
The zinc liquid in the zinc pot in the galvanizing step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
The leveling process adopts double leveling arrangement, the leveling elongation at the front of the furnace is 1.2 percent, and the leveling elongation at the back of the furnace is 1.3 percent; chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
Performance testing
The performance tests of the products of example 3 and example 4 of the present application were performed to obtain the performance test tables shown in table 1.
TABLE 1 galvanized sheet Properties
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The thermal-base non-flower high-strength galvanized sheet for the photovoltaic bracket is characterized by comprising the following chemical components in percentage by weight: 0.038-0.050% of C, 0.15-0.25% of Si, 0.50-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.020-0.030% of Als and the balance of iron.
2. The hot-base non-flower high-strength galvanized sheet for the photovoltaic bracket according to claim 1, wherein the hot-base non-flower high-strength galvanized sheet comprises the following chemical components in percentage by weight: 0.045% of C, 0.20% of Si, 0.55% of Mn, less than or equal to 0.010% of P, less than or equal to 0.002% of S, 0.025% of Als and the balance of iron.
3. The hot-base non-patterned high-strength galvanized plate for the photovoltaic bracket according to claim 1, wherein the thickness of the hot-base non-patterned high-strength galvanized plate is 1.0mm to 2.0mm, and the coating weight of the hot-base non-patterned high-strength galvanized plate is 60 grams per square meter to 600 grams per square meter.
4. The hot-base patterned-free high-strength galvanized sheet for the photovoltaic bracket according to claim 1, wherein the coating of the hot-base patterned-free high-strength galvanized sheet is a double-sided uniform-thickness coating.
5. The preparation process of the hot-base non-flower high-strength galvanized plate for the photovoltaic bracket as recited in any one of claims 1 to 4, wherein the preparation process comprises the following steps:
step (1), carrying out hot rolling and coiling on the molten steel to obtain a hot-rolled coil; the hot-rolled coil comprises the following chemical components in percentage by weight: 0.038-0.050% of C, 0.15-0.25% of Si, 0.50-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.020-0.030% of Als and the balance of iron;
and (2) carrying out a continuous pickling and galvanizing process on the hot-rolled coil to obtain a hot-galvanized coil.
6. The preparation process of the thermal-based non-flower high-strength galvanized plate for the photovoltaic bracket according to claim 5, characterized in that: the continuous pickling galvanizing process comprises the steps of pickling, leveling, heating, galvanizing, finishing, passivating and coiling to form the hot galvanizing coil.
7. The preparation process of the thermal-based non-flower high-strength galvanized plate for the photovoltaic bracket according to claim 6, characterized in that: in the acid washing step, the content of HCL in an acid tank is as follows: 40g/L-70g/L, acid washing temperature: 70-85 ℃.
8. The preparation process of the heat-based non-flower high-strength galvanized plate for the photovoltaic bracket according to claim 6, wherein in the heating step, the heating temperature condition of an induction heating furnace is as follows: when the thickness of the product is 1.0-2.0mm, the temperature of the soaking section of the radiant tube is 500-520 ℃, the temperature of the air injection cooling section is 500-510 ℃, the temperature of the pan feeding is 470-480 ℃, the dew point of the induction heating furnace is below minus 45 ℃, the furnace pressure is 0.5mbar-1.0mbar, and the hydrogen content is 5% -8%.
9. The preparation process of the hot-base non-flower high-strength galvanized plate for the photovoltaic bracket as recited in claim 6, wherein the zinc bath in the zinc plating step comprises the following components in percentage by weight: 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%, and others less than or equal to 0.015%; the temperature of the zinc liquid is as follows: 460 ℃ plus or minus 2 ℃.
10. The preparation process of the thermal-based non-flower high-strength galvanized plate for the photovoltaic bracket according to claim 6, wherein a double leveling arrangement is adopted in the leveling process, the leveling elongation in the front of the furnace is 0.8% -1.2%, and the leveling elongation in the back of the furnace is 0.8% -1.3%; and chromic acid passivation and oil coating treatment are carried out in the finishing and passivation process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115261703A (en) * | 2022-06-08 | 2022-11-01 | 日照宝华新材料有限公司 | Manufacturing method of high-corrosion-resistance steel plate for photovoltaic support |
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Application publication date: 20210205 |