CN116732419A - Production method of high weather-resistant coating-free steel for photovoltaic bracket - Google Patents
Production method of high weather-resistant coating-free steel for photovoltaic bracket Download PDFInfo
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- CN116732419A CN116732419A CN202310634155.XA CN202310634155A CN116732419A CN 116732419 A CN116732419 A CN 116732419A CN 202310634155 A CN202310634155 A CN 202310634155A CN 116732419 A CN116732419 A CN 116732419A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 41
- 238000005096 rolling process Methods 0.000 claims abstract description 29
- 238000005266 casting Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000010079 rubber tapping Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 52
- 238000007670 refining Methods 0.000 claims description 34
- 229910052742 iron Inorganic materials 0.000 claims description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 238000003723 Smelting Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000009749 continuous casting Methods 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 12
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 10
- 238000009529 body temperature measurement Methods 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 10
- 230000023556 desulfurization Effects 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 238000010583 slow cooling Methods 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 2
- 150000002910 rare earth metals Chemical class 0.000 abstract description 2
- 229910006639 Si—Mn Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/0226—Hot rolling
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
-
- 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
- Y02P10/20—Recycling
Abstract
The invention discloses a production method of a high weather-proof coating-free steel for a photovoltaic bracket, which comprises the following main processes and parameters: the molten steel of the casting machine comprises the following components: 0.06-0.08%, si:0.30 to 0.40 percent, mn: 0.45-0.55%, P: less than or equal to 0.020%, S: less than or equal to 0.001 percent, cu:0.26-0.36%, cr:0.35-0.45%, ni:0.10-0.14%, ti:0.015-0.025%, la:30-90ppm; (2) The tapping temperature of the casting blank is 1190+/-25 ℃, the finish rolling temperature of the finish rolling is 87+/-10 ℃, and the cooling speed is 10-20 ℃/S, and the thickness of the hot rolled steel strip is 4-8mm; the coiling temperature is 620+/-10 ℃. The invention adopts the conventional C-Si-Mn component system design, and improves the corrosion resistance of the steel belt by adding a small amount of rare earth La of corrosion resistant elements Cu, cr and Ni.
Description
Technical Field
The invention relates to the technical field of metallurgical plate production, in particular to a production method of steel for a high weather-proof coating-free photovoltaic bracket.
Background
The solar photovoltaic industry is one of the fastest growing industries worldwide. In order to realize sustainable development of energy and environment, solar photovoltaic power generation is used as a key point for development of new energy and renewable energy in various countries in the world. Under the strong support of governments of various countries, the world solar photovoltaic industry is rapidly developed. By the year 2010, the installation quantity of photovoltaic cells in the whole country reaches 90 ten thousand kW, and the photovoltaic cells are in the eighth place in the world.
Under the guidance of national ecological priority, green development, carbon peak, carbon neutralization strategy, the photovoltaic industry is coming to new development opportunity, the downstream steel market demand for the photovoltaic bracket is further increased, and the product has very good market prospect.
Disclosure of Invention
The invention aims to provide a production method of high weather-proof coating-free steel for a photovoltaic bracket, which adopts a conventional CSiMn component system design and improves the corrosion resistance of a steel belt by adding a small amount of rare earth La of corrosion resistant elements Cu, cr and Ni. The size and the shape of the residual inclusion in the steel are effectively controlled and improved by adding a small amount of La, the cleanliness of the molten steel is improved, the content of corrosion-resistant alloy elements is properly reduced, and the production cost is reduced.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a production method of a high weather-proof coating-free steel for a photovoltaic bracket, which comprises the following main processes and parameters:
the smelting-continuous casting production process flow comprises the following steps: molten iron pretreatment-converter-LF refining-casting machine; the molten steel of the casting machine comprises the following components: 0.06-0.08%, si:0.30 to 0.40 percent, mn: 0.45-0.55%, P: less than or equal to 0.020%, S: less than or equal to 0.001 percent, cu:0.26-0.36%, cr:0.35-0.45%, ni:0.10-0.14%, ti:0.015-0.025%, la:30-90ppm, and the balance of Fe and unavoidable impurities;
(2) The hot rolling production process flow comprises the following steps: casting blank-roller hearth type heating furnace-hot continuous rolling mill-laminar cooling-coiling; the tapping temperature of the casting blank is 1190+/-25 ℃, the finish rolling temperature of finish rolling is 87+/-10 ℃, the cooling speed is 10-20 ℃/S, and the thickness of the hot rolled steel strip is 4-8mm; the cooling adopts laminar cooling equipment, a front dispersion cooling mode and the coiling temperature is 620+/-10 ℃.
Further, carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding scrap steel into a converter, and tapping at the temperature of 1628 ℃; then carrying out LF external refining on molten steel smelted by a converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, carrying out temperature measurement and component fine adjustment on the LF external refining, continuously casting a slab, wherein the superheat degree is 20 ℃, and then carrying out slab cleaning, slow cooling and continuous casting slab quality inspection; the heating temperature of the plate blank is 1190 ℃, the heating time is 45min, and the plate blank is rolled by a hot continuous rolling mill; the finish rolling temperature is 872 ℃, and the thickness of the finished product is 8mm; the laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel strip is reduced to 620 ℃ for coiling; and finally, detecting the performance of the product.
Further, carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding scrap steel into a converter, and tapping the converter at 1630 ℃; then carrying out LF external refining on molten steel smelted by a converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, carrying out temperature measurement and component fine adjustment on the LF external refining, continuously casting a slab, wherein the superheat degree is 18 ℃, and then carrying out slab cleaning, slow cooling and continuous casting slab quality inspection; the heating temperature of the plate blank is 1195 ℃, the heating time is 46min, and the plate blank is rolled by a hot continuous rolling mill; the finish rolling temperature is 875 ℃, and the thickness of the finished product is 8mm; the laminar cooling adopts pre-dispersion cooling, the cooling speed is 17 ℃/S, and the temperature of the steel strip is reduced to 625 ℃ for coiling; and finally, detecting the performance of the product.
Further, carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding scrap steel into a converter, and tapping at the temperature of 1625 ℃; then carrying out LF external refining on molten steel smelted by a converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, carrying out temperature measurement and component fine adjustment on the LF external refining, continuously casting a slab, wherein the superheat degree is 20 ℃, and then carrying out slab cleaning, slow cooling and continuous casting slab quality inspection; the heating temperature of the plate blank is 1088 ℃, the heating time is 50min, and the hot continuous rolling mill rolls; the finish rolling temperature is 853 ℃, and the thickness of the finished product is 6mm; the laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel belt is reduced to 621 ℃ for coiling; and finally, detecting the performance of the product.
Further, the molten steel of the casting machine comprises the following components: 0.07%, si:0.36%, mn:0.52%, P:0.011%, S:0.003%, cu:0.27%, cr:0.43%, ni:0.12%, ti:0.018%, la:0.0022% and the balance of Fe and unavoidable impurities.
Further, the molten steel of the casting machine comprises the following components: 0.07%, si:0.35%, mn:0.53%, P:0.011%, S:0.003%, cu:0.30%, cr:0.40%, ni:0.11%, ti:0.019%, la:0.0053%, the balance being Fe and unavoidable impurities.
Further, the molten steel of the casting machine comprises the following components: 0.07%, si:0.35%, mn:0.50%, P:0.013%, S:0.003%, cu:0.30%, cr:0.39%, ni:0.14%, ti:0.021%, la:0.0078%, and the balance of Fe and unavoidable impurities.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention provides a production method of high weather-proof coating-free steel for a photovoltaic bracket, and the metallographic microstructure of the steel is ferrite, bainite and a small amount of pearlite. The steel for the high weather-proof coating-free photovoltaic bracket produced by the method provided by the invention is subjected to laboratory inspection, and various indexes of surface quality and performance reach the related technical standard requirements of a photovoltaic bracket matching factory, so that the related use requirements are met. The mechanical property and the technological property meet the related standards and the requirements of users.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a microstructure of example 1 of the present invention.
Detailed Description
The present invention will be described in more detail with reference to specific examples. The examples are merely illustrative of the best mode of the invention and do not limit the scope of the invention in any way.
Example 1
Carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the scrap steel into a converter, and tapping the converter at the temperature of 1628 ℃. And then carrying out LF external refining on the molten steel smelted by the converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, and carrying out temperature measurement and component fine adjustment on the LF external refining, wherein the chemical components of the LF external refining for a casting machine are shown in the table 1. And (3) performing continuous casting on the plate blank at the superheat degree of 20 ℃, cleaning and slowly cooling the plate blank, and performing quality inspection on the continuous casting blank. The slab is heated at 1190 ℃ for 45min, and is rolled by a hot continuous rolling mill. The finish rolling temperature is 872 ℃, and the thickness of the finished product is 8mm. The laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel belt is reduced to 620 ℃ for coiling. And finally, detecting the performance of the product.
Example 2
Carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the waste steel into a converter, and tapping the converter at the temperature of 1630 ℃. And then carrying out LF external refining on the molten steel smelted by the converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, and carrying out temperature measurement and component fine adjustment on the LF external refining, wherein the chemical components of the LF external refining for a casting machine are shown in the table 1. And (3) the continuous slab casting superheat degree is 18 ℃, and then the slab is cleaned, slowly cooled and the quality of the continuous casting slab is checked. The slab is heated at 1195 ℃ for 46min, and is rolled by a hot continuous rolling mill. The finish rolling temperature is 875 ℃, and the thickness of the finished product is 8mm. The laminar cooling adopts pre-dispersion cooling, the cooling speed is 17 ℃/S, and the temperature of the steel strip is reduced to 625 ℃ for coiling. And finally, detecting the performance of the product.
Example 3
Carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the scrap steel into a converter, and tapping the converter at the temperature of 1625 ℃. And then carrying out LF external refining on the molten steel smelted by the converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, and carrying out temperature measurement and component fine adjustment on the LF external refining, wherein the chemical components of the LF external refining for a casting machine are shown in the table 1. And (3) performing continuous casting on the plate blank at the superheat degree of 20 ℃, cleaning and slowly cooling the plate blank, and performing quality inspection on the continuous casting blank. The heating temperature of the plate blank is 1088 ℃, the heating time is 50min, and the hot continuous rolling mill is used for rolling. The finish rolling temperature is 853 ℃, and the thickness of the finished product is 6mm. The laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel belt is reduced to 621 ℃ for coiling. And finally, detecting the performance of the product.
Comparative example 1
Carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the scrap steel into a converter, and tapping the converter at the temperature of 1628 ℃. And then carrying out LF external refining on the molten steel smelted by the converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, and carrying out temperature measurement and component fine adjustment on the LF external refining, wherein the chemical components of the LF external refining for a casting machine are shown in the table 1. And (3) the continuous slab casting superheat degree is 18 ℃, and then the slab is cleaned, slowly cooled and the quality of the continuous casting slab is checked. The heating temperature of the plate blank is 1200 ℃, the heating time is 50min, and the plate blank is rolled by a hot continuous rolling mill. The finish rolling temperature is 860 ℃ and the thickness of the finished product is 6mm. The laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel belt is reduced to 630 ℃ for coiling. And finally, detecting the performance of the product.
TABLE 1 chemical Components (wt%) of examples 1 to 3 of the present invention
The steel coils of examples 1 to 3 of the present invention were subjected to mechanical property test, and the test results are shown in Table 2.
TABLE 2 mechanical Properties of the Steel coil of examples 1 to 3 of the invention
As can be seen from the data in table 2, the mechanical properties and the technological properties of the steel for the coating-free photovoltaic bracket produced by the method provided by the invention meet the requirements of the protocol signed by the user.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (7)
1. A production method of high weather-proof coating-free steel for a photovoltaic bracket is characterized by comprising the following steps of: the main process and parameters are as follows:
the smelting-continuous casting production process flow comprises the following steps: molten iron pretreatment-converter-LF refining-casting machine; the molten steel of the casting machine comprises the following components: 0.06-0.08%, si:0.30 to 0.40 percent, mn: 0.45-0.55%, P: less than or equal to 0.020%, S: less than or equal to 0.001 percent, cu:0.26-0.36%, cr:0.35-0.45%, ni:0.10-0.14%, ti:0.015-0.025%, la:30-90ppm, and the balance of Fe and unavoidable impurities;
(2) The hot rolling production process flow comprises the following steps: casting blank-roller hearth type heating furnace-hot continuous rolling mill-laminar cooling-coiling; the tapping temperature of the casting blank is 1190+/-25 ℃, the finish rolling temperature of finish rolling is 87+/-10 ℃, the cooling speed is 10-20 ℃/S, and the thickness of the hot rolled steel strip is 4-8mm; the cooling adopts laminar cooling equipment, a front dispersion cooling mode and the coiling temperature is 620+/-10 ℃.
2. The method for producing the steel for the high weather-resistant coating-free photovoltaic bracket according to claim 1, which is characterized in that: carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the scrap steel into a converter, and tapping the converter at the temperature of 1628 ℃; then carrying out LF external refining on molten steel smelted by a converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, carrying out temperature measurement and component fine adjustment on the LF external refining, continuously casting a slab, wherein the superheat degree is 20 ℃, and then carrying out slab cleaning, slow cooling and continuous casting slab quality inspection; the heating temperature of the plate blank is 1190 ℃, the heating time is 45min, and the plate blank is rolled by a hot continuous rolling mill; the finish rolling temperature is 872 ℃, and the thickness of the finished product is 8mm; the laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel strip is reduced to 620 ℃ for coiling; and finally, detecting the performance of the product.
3. The method for producing the steel for the high weather-resistant coating-free photovoltaic bracket according to claim 1, which is characterized in that: carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the scrap steel into a converter, and tapping the converter at the temperature of 1630 ℃; then carrying out LF external refining on molten steel smelted by a converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, carrying out temperature measurement and component fine adjustment on the LF external refining, continuously casting a slab, wherein the superheat degree is 18 ℃, and then carrying out slab cleaning, slow cooling and continuous casting slab quality inspection; the heating temperature of the plate blank is 1195 ℃, the heating time is 46min, and the plate blank is rolled by a hot continuous rolling mill; the finish rolling temperature is 875 ℃, and the thickness of the finished product is 8mm; the laminar cooling adopts pre-dispersion cooling, the cooling speed is 17 ℃/S, and the temperature of the steel strip is reduced to 625 ℃ for coiling; and finally, detecting the performance of the product.
4. The method for producing the steel for the high weather-resistant coating-free photovoltaic bracket according to claim 1, which is characterized in that: carrying out desulfurization pretreatment on molten iron, dephosphorizing and decarbonizing the molten iron by adopting top-bottom combined blown converter smelting to obtain molten steel, blowing argon in the whole process of converter smelting, adding the scrap steel into a converter, and tapping the converter at the temperature of 1625 ℃; then carrying out LF external refining on molten steel smelted by a converter, wherein the refining in-situ temperature is more than or equal to 1560 ℃, carrying out temperature measurement and component fine adjustment on the LF external refining, continuously casting a slab, wherein the superheat degree is 20 ℃, and then carrying out slab cleaning, slow cooling and continuous casting slab quality inspection; the heating temperature of the plate blank is 1088 ℃, the heating time is 50min, and the hot continuous rolling mill rolls; the finish rolling temperature is 853 ℃, and the thickness of the finished product is 6mm; the laminar cooling adopts pre-dispersion cooling, the cooling speed is 15 ℃/S, and the temperature of the steel belt is reduced to 621 ℃ for coiling; and finally, detecting the performance of the product.
5. The method for producing the steel for the high weather-resistant coating-free photovoltaic bracket according to claim 2, which is characterized in that: the molten steel of the casting machine comprises the following components: 0.07%, si:0.36%, mn:0.52%, P:0.011%, S:0.003%, cu:0.27%, cr:0.43%, ni:0.12%, ti:0.018%, la:0.0022% and the balance of Fe and unavoidable impurities.
6. The method for producing a steel for a high weather-resistant coating-free photovoltaic bracket according to claim 3, characterized by: the molten steel of the casting machine comprises the following components: 0.07%, si:0.35%, mn:0.53%, P:0.011%, S:0.003%, cu:0.30%, cr:0.40%, ni:0.11%, ti:0.019%, la:0.0053%, the balance being Fe and unavoidable impurities.
7. The method for producing the steel for the high weather-resistant coating-free photovoltaic bracket, which is characterized in that: the molten steel of the casting machine comprises the following components: 0.07%, si:0.35%, mn:0.50%, P:0.013%, S:0.003%, cu:0.30%, cr:0.39%, ni:0.14%, ti:0.021%, la:0.0078%, and the balance of Fe and unavoidable impurities.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987782A (en) * | 2017-03-17 | 2017-07-28 | 中国石油天然气集团公司 | A kind of resistance to a small amount of CO2And H2The continuous pipe and its manufacture method of S corrosion |
| CN111979479A (en) * | 2020-07-20 | 2020-11-24 | 包头钢铁（集团）有限责任公司 | Hot-rolled steel strip with thickness of 10.0-14.0 mm, low temperature resistance and high toughness for Q345NQR2 railway carriage |
| CN115074624A (en) * | 2022-06-22 | 2022-09-20 | 江苏沙钢集团淮钢特钢股份有限公司 | Steel for hydrogen sulfide corrosion resistant rare earth-containing heat exchange tube and preparation method thereof |
| CN115747644A (en) * | 2022-11-02 | 2023-03-07 | 包头钢铁（集团）有限责任公司 | Rare earth weathering steel for photovoltaic bracket and production method thereof |
| CN115896638A (en) * | 2022-12-29 | 2023-04-04 | 包头钢铁（集团）有限责任公司 | Rare earth microalloyed EH47 steel plate with high crack resistance and preparation method thereof |
| CN115927954A (en) * | 2022-11-02 | 2023-04-07 | 包头钢铁（集团）有限责任公司 | Method for improving impact toughness of weathering resistant steel |
-
2023
- 2023-05-31 CN CN202310634155.XA patent/CN116732419A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987782A (en) * | 2017-03-17 | 2017-07-28 | 中国石油天然气集团公司 | A kind of resistance to a small amount of CO2And H2The continuous pipe and its manufacture method of S corrosion |
| CN111979479A (en) * | 2020-07-20 | 2020-11-24 | 包头钢铁（集团）有限责任公司 | Hot-rolled steel strip with thickness of 10.0-14.0 mm, low temperature resistance and high toughness for Q345NQR2 railway carriage |
| CN115074624A (en) * | 2022-06-22 | 2022-09-20 | 江苏沙钢集团淮钢特钢股份有限公司 | Steel for hydrogen sulfide corrosion resistant rare earth-containing heat exchange tube and preparation method thereof |
| CN115747644A (en) * | 2022-11-02 | 2023-03-07 | 包头钢铁（集团）有限责任公司 | Rare earth weathering steel for photovoltaic bracket and production method thereof |
| CN115927954A (en) * | 2022-11-02 | 2023-04-07 | 包头钢铁（集团）有限责任公司 | Method for improving impact toughness of weathering resistant steel |
| CN115896638A (en) * | 2022-12-29 | 2023-04-04 | 包头钢铁（集团）有限责任公司 | Rare earth microalloyed EH47 steel plate with high crack resistance and preparation method thereof |
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