CN111575593A - Galvanized steel sheet for solar support pipe - Google Patents
Galvanized steel sheet for solar support pipe Download PDFInfo
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- CN111575593A CN111575593A CN202010598839.5A CN202010598839A CN111575593A CN 111575593 A CN111575593 A CN 111575593A CN 202010598839 A CN202010598839 A CN 202010598839A CN 111575593 A CN111575593 A CN 111575593A
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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
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
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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
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The application discloses a galvanized steel sheet for a solar support pipe and a preparation method thereof, wherein the steel sheet comprises the following chemical components in percentage by mass: c: 0.14% -0.20%, Si: 0-0.25%, Mn: 0.35-0.55%, Ti: 0.045% -0.065%, P: 0-0.020%, S: 0-0.010%, Al: 0.030 to 0.050 percent, and the balance of Fe and inevitable impurities. The method adopts a low-cost process design, and greatly reduces the production cost and ensures the performance of the product through matching with a small reduction rate and a short annealing time by proper raw material proportion.
Description
Technical Field
The application relates to the field of manufacturing of galvanized steel sheets, in particular to a galvanized steel sheet for a solar support pipe.
Background
In the prior art, the demand of solar support tubes is increasing day by day, and galvanized steel plates are generally adopted as the solar support tubes. Galvanized steel sheets used as solar support pipes are required to have a high elongation and a low yield ratio in addition to strength. Therefore, high strength of the steel sheet is required, and in order to increase the strength of the steel sheet, it is usually necessary to add solid solution elements such as Mn and Cr, and microalloying element Nb. Meanwhile, in order to realize good passing property after the galvanized sheet is coiled, the existing manufacturers need to fully anneal the galvanized sheet after the galvanized sheet is coiled under high rolling reduction to eliminate the problem of reduction of elongation, and have very high requirements on equipment of a production line.
Therefore, there is a need for a low-cost galvanized steel sheet for solar support pipes and a method for manufacturing the same.
Disclosure of Invention
The invention aims to provide a galvanized steel sheet for a solar support pipe. To overcome the defects in the prior art.
In order to achieve one of the above purposes, the invention provides the following technical scheme: a galvanized steel sheet for a solar support pipe comprises the following chemical components in percentage by mass: c: 0.14% -0.20%, Si: 0-0.25%, Mn: 0.35-0.55%, Ti: 0.045 to 0.065 percent,
p: 0-0.020%, S: 0-0.010%, Al: 0.030 to 0.050 percent, and the balance of Fe and inevitable impurities.
Preferably, the steel plate has a yield strength of 450MPa to 500MPa and a tensile strength of
530 to 620MPa, and the elongation is 27 to 32 percent.
In order to achieve the second object, the present invention provides a method for preparing a galvanized steel sheet for a solar support pipe, comprising: smelting in a converter, refining in an LF furnace, continuous casting, heating a continuous casting blank, hot continuous rolling, laminar cooling, continuous pickling, cold continuous rolling, continuous annealing and reduction, and hot galvanizing;
the refined molten steel comprises the following chemical components in percentage by mass: c: 0.14% -0.20%, Si: 0-0.25%, Mn: 0.35-0.55%, Ti: 0.045% -0.065%, P: 0-0.020%, S: 0-0.010%, Al: 0.030 to 0.050 percent, and the balance of Fe and inevitable impurities.
Preferably, the hot continuous rolling step: the heating temperature of the plate blank is 1200-1220 ℃, the initial rolling temperature of the rough rolling stage is 1050-1080 ℃, the rough rolling reduction rate is not less than 150%, the finish rolling temperature of the finish rolling stage is 830-850 ℃, the finish rolling reduction rate is not less than 100%, and the coiling temperature is 600-630 ℃.
Preferably, the cold continuous rolling step: the cold rolling reduction is not less than 25%.
Preferably, in the annealing procedure, the heating temperature of the annealing section hearth ranges from 1000 ℃ to 1050 ℃, the heat preservation time ranges from 4s to 6s, the heating temperature of the annealing reduction section hearth ranges from 850 ℃ to 900 ℃, and the heat preservation time ranges from 2s to 4 s.
Preferably, the hot dip galvanizing step: air cooling to 490 +/-10 ℃ and carrying out hot galvanizing.
Preferably, in the annealing process, before the steel plate enters the annealing furnace, chemical degreasing and electrolytic degreasing are carried out to remove oil and rust.
Compared with the prior art, the invention has the beneficial effects that:
1) the content of the noble metal Mn is reduced by adding microalloy Ti by adopting a low-cost process design; the good matching of strength and elongation is achieved by utilizing the work hardening generated by cold rolling and matching with a subsequent annealing process.
2) The process requirement of reducing the Si content is reduced, the Si content of the galvanized steel plate is less than 0.25%, the galvanizing requirement can be met, the Si content of the galvanized steel plate in the prior art is less than 0.05%, the control of a steelmaking process and alloy selection are facilitated, and the cost is greatly reduced.
3) The cold rolling reduction rate reaches 25 percent, so that the requirements can be met, the requirements on the capability of a rolling mill are low, the energy consumption is low, and the production process cost is low.
4) The continuous annealing furnace is adopted for high-temperature stress relief annealing and reduction, the heat preservation is controlled within 10s, the heat preservation time is short, and the production efficiency is high.
Detailed Description
Technical solutions in the embodiments of the present invention will be described in detail below, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example one
The method comprises the following steps: smelting in a converter;
step two: LF refining, namely, preparing molten steel into target components;
step three: and (2) continuous casting, wherein the refined molten steel is cast to obtain a continuous casting billet, and the continuous casting billet comprises the following components (in percentage by mass): c: 0.14%%, Si: 0.25%, Mn: 0.35%%, Ti: 0.045%%, P: 0.018%, S: 0.008%, Al: 0.030%%; the balance of Fe and inevitable impurities;
step four: heating the continuous casting billet, wherein the continuous casting billet is heated to 1200 ℃ in a stepping heating furnace;
step five: hot continuous rolling, wherein the initial rolling temperature in the rough rolling stage is 1050 ℃, the rough rolling reduction rate is not less than 150%, the finish rolling temperature in the finish rolling stage is 830 ℃, the finish rolling reduction rate is not less than 100%, and the coiling temperature is 600 ℃;
step six: laminar cooling;
step seven: continuous acid washing;
step eight: cold continuous rolling with a cold rolling reduction rate of 25%;
step nine: continuous annealing and reduction; chemical degreasing and electrolytic degreasing are carried out on the steel plate before the steel plate enters the annealing furnace for oil removal and rust removal; heating the annealing section hearth at 1000 ℃, keeping the temperature for 4s, heating the annealing reduction section hearth at 850 ℃, keeping the temperature for 2s, and performing hot galvanizing by air cooling to 480 ℃;
step ten: hot galvanizing.
Through detection, the mechanical properties of the product of the embodiment are as follows: yield strength 503MPa, elongation 32% and tensile strength 545 MPa.
Example two
The method comprises the following steps: smelting in a converter;
step two: LF refining, namely, preparing molten steel into target components;
step three: and (2) continuous casting, wherein the refined molten steel is cast to obtain a continuous casting billet, and the continuous casting billet comprises the following components (in percentage by mass): c: 0.18%%, Si: 0.20%, Mn: 0.45%%, Ti: 0.055%%, P: 0.016%, S: 0.009%, Al: 0.040%%; the balance of Fe and inevitable impurities;
step four: heating the continuous casting billet, wherein the continuous casting billet is heated to 1210 ℃ in a stepping heating furnace;
step five: hot continuous rolling, wherein the initial rolling temperature of a rough rolling stage is 1060 ℃, the rough rolling reduction rate is not less than 150%, the finish rolling temperature of a finish rolling stage is 840 ℃, the finish rolling reduction rate is not less than 100%, and the coiling temperature is 620 ℃;
step six: laminar cooling;
step seven: continuous acid washing;
step eight: cold continuous rolling with a cold rolling reduction rate of 28%;
step nine: continuous annealing and reduction; chemical degreasing and electrolytic degreasing are carried out on the steel plate before the steel plate enters the annealing furnace for oil removal and rust removal; heating the annealing section hearth at 1020 ℃, keeping the temperature for 5s, heating the annealing reduction section hearth at 880 ℃, keeping the temperature for 3s, and cooling to 490 ℃ for hot galvanizing;
step ten: hot galvanizing.
Through detection, the mechanical properties of the product of the embodiment are as follows: the yield strength is 480MPa, the elongation is 28 percent, and the tensile strength is 550 MPa.
EXAMPLE III
The method comprises the following steps: smelting in a converter;
step two: LF refining, namely, preparing molten steel into target components;
step three: and (2) continuous casting, wherein the refined molten steel is cast to obtain a continuous casting billet, and the continuous casting billet comprises the following components (in percentage by mass): c: 0.20%%, Si: 0.18%, Mn: 0.45%%, Ti: 0.045%%, P: 0.011%, S: 0.006%, Al: 0.032% >; the balance of Fe and inevitable impurities;
step four: heating the continuous casting billet, wherein the continuous casting billet is heated to 1220 ℃ in a stepping heating furnace;
step five: hot continuous rolling, wherein the initial rolling temperature in the rough rolling stage is 1080 ℃, the rough rolling reduction rate is not less than 150%, the finish rolling temperature in the finish rolling stage is 850 ℃, the finish rolling reduction rate is not less than 100%, and the coiling temperature is 630 ℃;
step six: laminar cooling;
step seven: continuous acid washing;
step eight: cold continuous rolling with a cold rolling reduction rate of 26%;
step nine: continuous annealing and reduction; chemical degreasing and electrolytic degreasing are carried out on the steel plate before the steel plate enters the annealing furnace for oil removal and rust removal; heating the annealing section hearth at 1050 ℃, keeping the temperature for 6s, heating the annealing reduction section hearth at 880 ℃, keeping the temperature for 3s, air-cooling to 500 ℃ and carrying out hot galvanizing;
step ten: hot galvanizing.
Through detection, the mechanical properties of the product of the embodiment are as follows: the yield strength is 500MPa, the elongation is 29 percent, and the tensile strength is 600 MPa.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a detailed description of the present application, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application, and these should also be considered as the protection scope of the present application.
Claims (8)
1. A galvanized steel sheet for a solar support pipe is characterized in that: the steel plate comprises the following chemical components in percentage by mass: c: 0.14% -0.20%, Si: 0-0.25%, Mn: 0.35-0.55%, Ti: 0.045% -0.065%, P: 0-0.020%, S: 0-0.010%, Al: 0.030 to 0.050 percent, and the balance of Fe and inevitable impurities.
2. The galvanized steel sheet for a solar support pipe according to claim 1, wherein: the yield strength of the steel plate is 450-500 MPa, the tensile strength is 530-620 MPa, and the elongation is 27-32%.
3. The method for producing a galvanized steel sheet for a solar support pipe according to claims 1 to 2, characterized in that: the method comprises the following steps: smelting in a converter, refining in an LF furnace, continuous casting, heating a continuous casting blank, hot continuous rolling, laminar cooling, continuous pickling, cold continuous rolling, continuous annealing and reduction, and hot galvanizing;
the refined molten steel comprises the following chemical components in percentage by mass: c: 0.14% -0.20%, Si: 0-0.25%, Mn: 0.35-0.55%, Ti: 0.045% -0.065%, P: 0-0.020%, S: 0-0.010%, Al: 0.030 to 0.050 percent, and the balance of Fe and inevitable impurities.
4. The method for producing a galvanized steel sheet for a solar support pipe according to claim 3, characterized in that: the hot continuous rolling process comprises the following steps: the heating temperature of the plate blank is 1200-1220 ℃, the initial rolling temperature of the rough rolling stage is 1050-1080 ℃, the rough rolling reduction rate is not less than 150%, the finish rolling temperature of the finish rolling stage is 830-850 ℃, the finish rolling reduction rate is not less than 100%, and the coiling temperature is 600-630 ℃.
5. The method for producing a galvanized steel sheet for a solar support pipe according to claim 3, characterized in that: the cold continuous rolling process comprises the following steps: the cold rolling reduction is not less than 25%.
6. The method for producing a galvanized steel sheet for a solar support pipe according to claim 3, characterized in that: in the annealing procedure, the heating temperature of the annealing section hearth ranges from 1000 ℃ to 1050 ℃, the heat preservation time ranges from 4s to 6s, the heating temperature of the annealing reduction section hearth ranges from 850 ℃ to 900 ℃, and the heat preservation time ranges from 2s to 4 s.
7. The method for producing a galvanized steel sheet for a solar support pipe according to claim 3, characterized in that: the hot galvanizing procedure comprises the following steps: air cooling to 490 +/-10 ℃ and carrying out hot galvanizing.
8. The method for producing a galvanized steel sheet for a solar support pipe according to claim 6, characterized in that: in the annealing process, before the steel plate enters the annealing furnace, chemical degreasing and electrolytic degreasing are carried out for oil removal and rust removal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010598839.5A CN111575593A (en) | 2020-06-28 | 2020-06-28 | Galvanized steel sheet for solar support pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010598839.5A CN111575593A (en) | 2020-06-28 | 2020-06-28 | Galvanized steel sheet for solar support pipe |
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| CN111575593A true CN111575593A (en) | 2020-08-25 |
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| CN202010598839.5A Pending CN111575593A (en) | 2020-06-28 | 2020-06-28 | Galvanized steel sheet for solar support pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114574685A (en) * | 2020-11-30 | 2022-06-03 | 宝山钢铁股份有限公司 | Method for regulating and controlling surface and mechanical property of short-process continuous casting and rolling plain carbon steel hot rolled strip steel |
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| KR20090120720A (en) * | 2008-05-20 | 2009-11-25 | 주식회사 포스코 | Cold-rolled steel sheet and hot dip galvanized steel sheet with high strength and high formabilitry and manufacturing method thereof |
| CN103726003A (en) * | 2013-12-20 | 2014-04-16 | 东北大学 | Hot rolled strip steel pickling-free hot galvanizing method based on scale reduction |
| CN105483535A (en) * | 2015-12-08 | 2016-04-13 | 武汉钢铁(集团)公司 | High-strength hot-galvanized dual-phase steel and preparation method thereof |
| CN109306432A (en) * | 2018-11-13 | 2019-02-05 | 湖南华菱涟源钢铁有限公司 | A kind of bimetal saw blade backing cold-strip steel and its manufacturing method |
| CN110607476A (en) * | 2019-09-30 | 2019-12-24 | 柳州钢铁股份有限公司 | Manufacturing method of cold-rolled hot-galvanized high-strength structural steel with yield strength of 350MPa |
-
2020
- 2020-06-28 CN CN202010598839.5A patent/CN111575593A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090120720A (en) * | 2008-05-20 | 2009-11-25 | 주식회사 포스코 | Cold-rolled steel sheet and hot dip galvanized steel sheet with high strength and high formabilitry and manufacturing method thereof |
| CN103726003A (en) * | 2013-12-20 | 2014-04-16 | 东北大学 | Hot rolled strip steel pickling-free hot galvanizing method based on scale reduction |
| CN105483535A (en) * | 2015-12-08 | 2016-04-13 | 武汉钢铁(集团)公司 | High-strength hot-galvanized dual-phase steel and preparation method thereof |
| CN109306432A (en) * | 2018-11-13 | 2019-02-05 | 湖南华菱涟源钢铁有限公司 | A kind of bimetal saw blade backing cold-strip steel and its manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114574685A (en) * | 2020-11-30 | 2022-06-03 | 宝山钢铁股份有限公司 | Method for regulating and controlling surface and mechanical property of short-process continuous casting and rolling plain carbon steel hot rolled strip steel |
| CN114574685B (en) * | 2020-11-30 | 2024-04-05 | 宝山钢铁股份有限公司 | Method for regulating and controlling surface and mechanical properties of short-process continuous casting and rolling plain carbon steel hot rolled strip steel |
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Application publication date: 20200825 |