CN115094205A - Hot galvanizing production method of low-cost steel plate for light steel keel - Google Patents
Hot galvanizing production method of low-cost steel plate for light steel keel Download PDFInfo
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- CN115094205A CN115094205A CN202210742910.1A CN202210742910A CN115094205A CN 115094205 A CN115094205 A CN 115094205A CN 202210742910 A CN202210742910 A CN 202210742910A CN 115094205 A CN115094205 A CN 115094205A
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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
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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
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
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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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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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
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—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
Abstract
The invention discloses a hot galvanizing production method of a low-cost steel plate for a light steel keel, which comprises the following steps: carrying out surface reduction and continuous annealing on the cold-rolled steel plate by a vertical annealing furnace, and introducing 12-15% hydrogen; the annealing temperature of the open flame section is 450-550 ℃, the annealing temperature of the radiation section is 490-550 ℃, and the temperature of the furnace outlet is 465-500 ℃; setting the furnace pressure to be 15-20 dapa; the production line speed is 60-80 m/min; the temperature of a hot galvanizing zinc pot is set to 460 and 470 ℃, the aluminum content in the zinc liquid is 0.18-0.23%, and the balance is zinc and inevitable impurities; setting the elongation of the plated steel plate to be 0.4-0.6%; the galvanized steel plate adopts a spray drying process, the conductivity of the passivation solution is 12-14ms, and the drying temperature is 80-120 ℃. The invention mainly solves the problem of high production cost of the high-strength hot-dip galvanized steel sheet.
Description
Technical Field
The invention relates to the technical field of hot-dip galvanized steel strip production, in particular to a hot-dip galvanized production method of a low-cost steel plate for a light steel keel.
Background
The standard system of light steel keel house popularized by the Ministry of domestic construction for building green energy-saving heat-insulating houses is a key project for the government to pay attention to and popularize for the national project. The light steel keel house is paid much attention at home and abroad, and is an energy-saving, environment-friendly and national-benefit project.
According to the material design standard of the technical code of low-layer cold-bent thin-wall steel house building, and in combination with the requirements of end users on house design, the surface quality of the hot-galvanized product meets FB-grade requirements, and the tensile strength is more than or equal to 550 Mp. At present, the raw material components of the high-strength galvanized steel sheet in the industry generally adopt means such as high carbon, microalloy elements and the like to meet the high-strength requirement of the hot-dip galvanized product, and the alloy cost is high. Meanwhile, the hot galvanizing process mostly adopts a American steel combination method, the hot galvanizing is finished after the steel plate is subjected to electrolytic cleaning and full radiation heating annealing, and the energy consumption and the cost are high.
Chinese patent CN201710013880.X discloses a high-strength galvanized steel sheet and a production process thereof, wherein the raw material components are designed as follows: c: 0.00-0.20%, Si: 0.00-0.30%, Mn: 0.00-0.50%, P: 0.00-0.035%, the tensile strength of the steel plate after hot galvanizing process only reaches 400Mp, and the steel plate does not meet the requirement of the light steel keel steel plate on the tensile strength.
Chinese patent CN200810012978.4 discloses a high-strength and good-surface quality full-hard hot-dip galvanized steel sheet and a production method thereof, the component design is C: 0.02 to 0.15%, Si: 0.00-0.05%, Mn: 0.15 to 1.50%, Nb/Ti: 0.02-0.10%. The continuous annealing temperature of the hot galvanizing process is 600-710 ℃. From the disclosure of the patent document, the substrate of the hot dip galvanized steel sheet has high content of Nb/Ti microalloy elements, the hot dip galvanizing annealing temperature is high, and the production cost is increased.
Chinese patent CN201210268709.0 discloses a hot-dip galvanized steel sheet with yield strength more than or equal to 550MPa and a manufacturing method thereof, wherein the hydrogen content in an annealing furnace of a hot-dip galvanizing process reaches 20-45%, and the energy consumption cost is high.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a low-cost hot-dip galvanized production method of a steel plate for a light steel keel, which mainly solves the problem of high production cost of a high-strength hot-dip galvanized steel plate.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a hot galvanizing production method of a low-cost steel plate for a light steel keel, which comprises the following steps:
the burning residual air coefficient of the open fire section of the hot galvanizing annealing furnace is 0.8-1, the oxidation of strip steel is prevented, the heating of the radiation section is controlled by adopting a six-row BCU ignition unit, the annealing temperature of the strip steel of the open fire section is 450-;
introducing 12-15% hydrogen into the annealing furnace, and setting the furnace pressure to be 15-20 dapa;
an online oxyhydrogen analyzer and a furnace pressure detector are arranged in the annealing furnace, so that the content of atmosphere in the annealing furnace and the furnace pressure are continuously analyzed in real time, and conditions are created for low-temperature annealing;
the production line speed is 60-80m/min, 2-4 transition rolls are arranged in advance before the low-temperature annealing steel plate is produced, and the transition rolls are gradually and excessively adjusted to the requirements of the low-temperature annealing process;
the temperature of a hot galvanizing zinc pot is set to 460 and 470 ℃, the aluminum content in the zinc liquid is 0.18-0.23%, and the balance is zinc and inevitable impurities;
the elongation of the plated steel plate is set to be 0.4-0.6%, and the flatness of the steel plate is ensured;
the steel plate after plating adopts a spray drying process, the corrosion resistance of the steel plate is improved, the conductivity of the passivation solution is 12-14ms, and the passivation drying temperature is 80-120 ℃.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.04-0.07% of C, less than or equal to 0.1% of Si, 0.1-0.4% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, and the balance of iron and inevitable impurity elements.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.05% of C, 0.02% of S i, 0.12% of Mn, P: 0.014%, 0.007% of S and the balance of iron and inevitable impurity elements.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.06% of C, 0.03% of Si, 0.11% of Mn, P: 0.014%, 0.007% of S and the balance of iron and inevitable impurity elements.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.06% of C, 0.03% of Si, 0.13% of Mn, P: 0.015 percent of S, 0.008 percent of S and the balance of iron and inevitable impurity elements.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.05% of C, 0.03% of Si, 0.12% of Mn, P: 0.016 percent, 0.009 percent of S and the balance of iron and inevitable impurity elements.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.04% of C, 0.02% of Si, 0.11% of Mn, P: 0.017 percent of S, 0.007 percent of S and the balance of iron and inevitable impurity elements.
Further, the steel plate comprises the following chemical components in percentage by mass: 0.07% of C, 0.03% of Si, 0.14% of Mn, P: 0.013% of S, 0.008% of S and the balance of iron and inevitable impurity elements.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the invention adopts low-carbon design for component design, does not add strengthening elements, improves the welding performance of products and reduces the alloy cost.
2. According to the hot galvanizing process under the component system, the steel plate is not recrystallized in the hot galvanizing annealing furnace, the rolling hard fibrous structure is reserved, the temperature is reduced by 100-200 ℃ compared with the conventional recrystallization annealing furnace, the energy consumption is saved, and the strength of the steel plate is improved.
3. The hot galvanizing annealing furnace adopts the combination of the open flame section and the radiation section, and the coefficient of the excess air of combustion of the open flame section is less than 1, so that the oxidation of strip steel is prevented. Compared with the currently generally adopted American steel union total radiation heating furnace, the open fire heating efficiency is higher, and the energy consumption cost is reduced.
4. The invention adopts a test design method to determine the most economical hydrogen introduction amount in the hot galvanizing annealing furnace, thereby not only better avoiding the hydrogen explosive range and improving the safety factor, but also fully reducing the surface of the strip steel, ensuring the adhesiveness of the zinc coating and further reducing the energy consumption cost.
5. The tensile strength of the final product reaches above 550Mp, and the surface, plate shape and corrosion resistance of the final product are good, so that the requirements of relevant specifications are met and the final product is approved by users.
Detailed Description
A production method of a hot-dip galvanized steel plate for a low-cost light steel keel comprises the following chemical components in percentage by weight: 0.04-0.07% of C, less than or equal to 0.1% of Si, 0.1-0.4% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.02-0.045% of Als, and the balance of iron and unavoidable inclusion elements; the specific process comprises the following steps:
carrying out surface reduction and continuous annealing on the cold-rolled steel plate by a vertical annealing furnace, wherein the reducing gas is hydrogen and the introduction amount is 12-15%; the annealing temperature of the open flame section is 450-550 ℃, the annealing temperature of the radiation section is 490-550 ℃, and the temperature of the furnace outlet is 465-500 ℃; the furnace pressure is set to 15-20 dapa.
The production line speed is 60-80m/min, transition rolls 3 are arranged in advance before the low-temperature annealing steel plate is produced, and the requirements of the low-temperature annealing process are gradually and excessively adjusted.
The temperature of the hot galvanizing zinc pot is set to 460 and 470 ℃, the aluminum content in the zinc liquid is 0.18-0.23%, and the balance is zinc and inevitable impurities.
The elongation of the plated steel plate is set to be 0.4-0.6%, and the flatness of the steel plate is ensured.
The galvanized steel plate adopts a spray drying process, the conductivity of the passivation solution is 12-14ms, and the drying temperature is 80-120 ℃.
The invention is further illustrated by the following examples, which are set forth in tables 1-4.
The galvanized substrate with the chemical composition shown in the table 1 is obtained through converter smelting, CSP continuous casting and rolling and five-stand acid continuous rolling.
Table 1 composition design of the invention (in weight percent%), balance iron and unavoidable impurities
| Element(s) | C | Si | Mn | P | S |
| Setting up | 0.04～0.07 | 0-0.1 | 0.1～0.4 | 0-0.025 | 0-0.015 |
| Example one | 0.05 | 0.02 | 0.12 | 0.014 | 0.007 |
| Example two | 0.06 | 0.03 | 0.11 | 0.014 | 0.007 |
| EXAMPLE III | 0.06 | 0.03 | 0.13 | 0.015 | 0.008 |
| Example four | 0.05 | 0.03 | 0.12 | 0.016 | 0.009 |
| EXAMPLE five | 0.04 | 0.02 | 0.11 | 0.017 | 0.007 |
| Example six | 0.07 | 0.03 | 0.14 | 0.013 | 0.008 |
Before the low-temperature annealing steel plate is produced, 3 rolls of transition coils are arranged in advance, parameters of the galvanizing annealing process are gradually adjusted to an optimal target value in an excessive mode, and control parameters are shown in a table 2.
TABLE 2 parameters of the annealing furnace for hot dip galvanizing of the present invention
And (3) the annealed steel plate enters a hot dip galvanizing process, and the zinc pot process parameters are shown in a table 3.
TABLE 3 hot-dip galvanizing zinc pot parameters of the invention
| Zinc pot parameters | Aluminum content (%) | Temperature of molten zinc (. degree. C.) |
| Setting up | 0.18-0.23 | 460-470 |
| Example one | 0.185 | 465 |
| Example two | 0.192 | 463 |
| EXAMPLE III | 0.20 | 464 |
| Example four | 0.212 | 467 |
| EXAMPLE five | 0.215 | 466 |
| EXAMPLE six | 0.208 | 462 |
After hot galvanizing, the steel plate is subjected to post-plating treatment, and the straightness and corrosion resistance of the steel plate are ensured through the processes of stretching, straightening and spraying passivation, and specific parameters are shown in Table 4.
TABLE 4 post-treatment parameters for hot-dip galvanizing of the present invention
The mechanical properties and cold bending test results of the hot-dip galvanized steel sheet for light gauge steel obtained by the above method are shown in table 5.
TABLE 5 mechanical Properties and Zinc layer adhesion of Steel sheet for light Steel Keel of the present invention
| Mechanical properties | Tensile strength of steel plate (MPa) | 180 degree cold bend test |
| Setting up | ≥550 | ————— |
| Example one | 577 | Intact without dezincification |
| Example two | 564 | Intact without dezincification |
| EXAMPLE III | 580 | Intact without dezincification |
| Example four | 565 | Intact without dezincification |
| EXAMPLE five | 569 | Intact without dezincification |
| EXAMPLE six | 555 | Intact without dezincification |
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. A hot galvanizing production method of a low-cost steel plate for a light steel keel is characterized by comprising the following steps: the method comprises the following steps:
the burning residual air coefficient of the open fire section of the hot galvanizing annealing furnace is 0.8-1, the oxidation of strip steel is prevented, the heating of the radiation section is controlled by adopting a six-row BCU ignition unit, the annealing temperature of the strip steel of the open fire section is 450-;
introducing hydrogen with the content of 12-15% into annealing, and setting the furnace pressure to be 15-20 dapa;
an online oxyhydrogen analyzer and a furnace pressure detector are arranged in the annealing furnace, so that the content of atmosphere in the annealing furnace and the furnace pressure are continuously analyzed in real time, and conditions are created for low-temperature annealing;
the production line speed is 60-80m/min, 2-4 transition rolls are arranged in advance before the low-temperature annealing steel plate is produced, and the transition rolls are gradually and excessively adjusted to the requirements of the low-temperature annealing process;
the temperature of a hot galvanizing zinc pot is set to 460 and 470 ℃, the aluminum content in the zinc liquid is 0.18-0.23%, and the balance is zinc and inevitable impurities;
the elongation of the plated steel plate is set to be 0.4-0.6%, and the flatness of the steel plate is ensured;
the steel plate after plating adopts a spray drying process, the corrosion resistance of the steel plate is improved, the electric conductivity of the passivation solution is 12-14ms, and the passivation drying temperature is 80-120 ℃.
2. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.04-0.07% of C, less than or equal to 0.1% of Si, 0.1-0.4% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, and the balance of iron and inevitable impurity elements.
3. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.05% of C, 0.02% of Si, 0.12% of Mn, P: 0.014%, 0.007% of S and the balance of iron and inevitable impurity elements.
4. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.06% of C, 0.03% of Si, 0.11% of Mn, P: 0.014%, 0.007% of S and the balance of iron and inevitable impurity elements.
5. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.06% of C, 0.03% of Si, 0.13% of Mn, P: 0.015 percent of S, 0.008 percent of S and the balance of iron and inevitable impurity elements.
6. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.05% of C, 0.03% of Si, 0.12% of Mn, P: 0.016 percent, 0.009 percent of S and the balance of iron and inevitable impurity elements.
7. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.04% of C, 0.02% of Si, 0.11% of Mn, P: 0.017 percent of S, 0.007 percent of S, and the balance of iron and inevitable impurity elements.
8. The hot dip galvanizing production method of the low-cost steel sheet for the light gauge steel according to claim 1, characterized in that: the steel plate comprises the following chemical components in percentage by mass: 0.07% of C, 0.03% of Si, 0.14% of Mn, P: 0.013% of S, 0.008% of S and the balance of iron and inevitable impurity elements.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1161277A (en) * | 1997-08-28 | 1999-03-05 | Nkk Corp | Continuous heat treatment method of steel sheet |
| CN101078096A (en) * | 2006-05-25 | 2007-11-28 | 福建方明钢铁有限公司 | Strip steel continuous zinc heat coating process |
| CN102796949A (en) * | 2012-07-31 | 2012-11-28 | 马钢(集团)控股有限公司 | Hot galvanizing steel plate with yield strength more than or equal to 550MPa, and manufacturing method thereof |
| CN110359001A (en) * | 2019-08-31 | 2019-10-22 | 日照宝华新材料有限公司 | A kind of process and its equipment for producing think gauge hot substrate and having colored galvanizing production |
| CN110564925A (en) * | 2019-07-02 | 2019-12-13 | 浙江金泽节能建材科技有限公司 | Treatment process of corrosion-resistant keel |
| CN112251680A (en) * | 2020-09-25 | 2021-01-22 | 河钢股份有限公司承德分公司 | Hot-base zinc-flower-free galvanized steel coil and production method thereof |
-
2022
- 2022-06-27 CN CN202210742910.1A patent/CN115094205A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1161277A (en) * | 1997-08-28 | 1999-03-05 | Nkk Corp | Continuous heat treatment method of steel sheet |
| CN101078096A (en) * | 2006-05-25 | 2007-11-28 | 福建方明钢铁有限公司 | Strip steel continuous zinc heat coating process |
| CN102796949A (en) * | 2012-07-31 | 2012-11-28 | 马钢(集团)控股有限公司 | Hot galvanizing steel plate with yield strength more than or equal to 550MPa, and manufacturing method thereof |
| CN110564925A (en) * | 2019-07-02 | 2019-12-13 | 浙江金泽节能建材科技有限公司 | Treatment process of corrosion-resistant keel |
| CN110359001A (en) * | 2019-08-31 | 2019-10-22 | 日照宝华新材料有限公司 | A kind of process and its equipment for producing think gauge hot substrate and having colored galvanizing production |
| CN112251680A (en) * | 2020-09-25 | 2021-01-22 | 河钢股份有限公司承德分公司 | Hot-base zinc-flower-free galvanized steel coil and production method thereof |
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