CN108441796B - Hot-dip galvanized aluminum-magnesium alloy steel plate and production process thereof - Google Patents
Hot-dip galvanized aluminum-magnesium alloy steel plate and production process thereof Download PDFInfo
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- CN108441796B CN108441796B CN201810348462.0A CN201810348462A CN108441796B CN 108441796 B CN108441796 B CN 108441796B CN 201810348462 A CN201810348462 A CN 201810348462A CN 108441796 B CN108441796 B CN 108441796B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
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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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a hot-dip galvanized aluminum-magnesium alloy steel plate and a production process thereof, and the production process comprises the following steps: the steel plate and the coating on the surface thereof comprise the following components: aluminum, magnesium, cerium, lanthanum, antimony and zinc, and putting a zinc ingot into a zinc pot for heating and melting; putting magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth, melting, sampling, carrying out spectral analysis on the samples, determining each chemical component, then continuously adding the zinc ingots, the magnesium-zinc alloy ingots, the aluminum-zinc alloy ingots and the rare earth according to the actual content of each component, uniformly stirring, and then carrying out spectral analysis on the samples until the content requirements of the components are met; polishing the steel plate, and then passivating the front side of the steel plate; galvanizing the steel plate, preheating the steel plate before the steel plate is put into a pot, and annealing after galvanizing. By the mode, the hot-dip galvanized aluminum-magnesium alloy steel plate and the production process thereof improve the corrosion resistance of the hot-dip galvanized aluminum-magnesium alloy steel plate, and are not easy to cause coating stripping.
Description
Technical Field
The invention relates to the field of galvanized steel sheets, in particular to a hot-dip galvanized aluminum-magnesium alloy steel sheet and a production process thereof.
Background
According to the relevant data, in the 90 s of the 20 th century, a great deal of work was done on the development of hot dip galvanized aluminum-magnesium alloy coated steel plates by the Japanese UK steel and the NiK iron, and great progress was made, and firstly, commercial production of the zinc-aluminum-magnesium alloy coated steel plates was started, and zinc-aluminum-magnesium alloy coated steel plates with the trade names of ZAM, Super Dyma, Dymazin and the like were successively developed. In recent years, various major steel companies in europe, such as: plating steel plates with the trade names ZMOProtect, Magizinc, Magnelis and the like are developed successively for Anselomari, Thinsen Krupp and Tata steel, and a new generation of ZINCALUME magnesium-containing plating steel plate is developed on the basis of 55% aluminum-zinc alloy plating by Australian Bosger.
Compared with the traditional coatings such as hot galvanizing, hot-dip aluminum zinc and the like, the hot-dip aluminum magnesium alloy coating has excellent corrosion resistance, is thin, compact in structure, not easy to peel off, high in surface hardness, good in scratch resistance, better in protection performance for cuts and defects, and good in corrosion resistance under severe corrosion environments. However, due to the technical barriers, the production technology of domestic hot-dip galvanized aluminum-magnesium alloy steel sheets is relatively lagged behind and needs to be improved.
Disclosure of Invention
The invention mainly solves the technical problem of providing a hot-dip galvanized aluminum-magnesium alloy steel plate and a production process thereof, which are used for producing the hot-dip galvanized aluminum-magnesium alloy steel plate and improving the surface quality of the hot-dip galvanized aluminum-magnesium alloy steel plate.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is a hot-dip galvanized aluminum-magnesium alloy steel sheet comprising: the steel plate and the coating on the surface thereof comprise the following components:
aluminum: 0.2-0.25%;
magnesium: 0.5-0.6%;
cerium: 0.02-0.03%;
lanthanum: 0.02-0.03%;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
In a preferred embodiment of the invention, the coating comprises the following components:
aluminum: 0.22 percent;
magnesium: 0.55 percent;
cerium: 0.025 percent;
lanthanum: 0.025 percent;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
In a preferred embodiment of the invention, the coating comprises the following components:
aluminum: 0.2 percent;
magnesium: 0.5 percent;
cerium: 0.02 percent;
lanthanum: 0.02 percent;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
In a preferred embodiment of the invention, the coating comprises the following components:
aluminum: 0.25 percent;
magnesium: 0.6 percent;
cerium: 0.03 percent;
lanthanum: 0.03 percent;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
In order to solve the technical problem, the invention adopts another technical scheme that: the production process of the hot-dip galvanized aluminum-magnesium alloy steel plate comprises the following steps:
putting the zinc ingot into a zinc pot for heating and melting;
putting magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth, melting, sampling, carrying out spectral analysis on the samples, determining each chemical component, then continuously adding the zinc ingots, the magnesium-zinc alloy ingots, the aluminum-zinc alloy ingots and the rare earth according to the actual content of each component, uniformly stirring, and then carrying out spectral analysis on the samples until the content requirements of the components are met;
polishing the steel plate, and then passivating the front side of the steel plate;
galvanizing of the steel sheet: the temperature of the zinc pot is kept at 460-475 ℃, the steel plate is preheated before being put into the pot, and annealing is carried out after galvanizing.
In a preferred embodiment of the invention, the rare earths include cerium rare earths and lanthanum rare earths.
In a preferred embodiment of the present invention, the passivation treatment is chromic acid passivation treatment.
In a preferred embodiment of the present invention, the preheating temperature of the steel plate is 465, 465 ~ 525 ℃, and the temperature of the steel plate during annealing is 675-725 ℃.
The invention has the beneficial effects that: according to the hot-dip galvanized aluminum-magnesium alloy steel plate and the production process thereof, the content of aluminum, magnesium, cerium, lanthanum and antimony in the coating is optimized, the corrosion resistance of the hot-dip galvanized aluminum-magnesium alloy steel plate is improved, the coating is not easy to peel off, the surface hardness of the coating is high, the wear resistance effect is good, the hot-dip galvanized aluminum-magnesium alloy steel plate can adapt to a complex use environment, the requirement on the temperature of a zinc pot in the production process is clear, the control precision of each element is high, annealing is carried out, and the combination of the coating and the steel plate is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious 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 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.
Magnesium is a ductile divalent metal element and is easily oxidized in air to produce magnesium oxide. Experiments prove that the higher the aluminum and magnesium contents in the plating solution, the better the corrosion resistance of the product, but the higher the magnesium content can affect other performances of the plating layer, for example, when the magnesium content is below 1%, the zinc liquid has better fluidity, and the surface of the plating layer is bright and flat; when the magnesium content is 1-3%, the surface of the plating layer is dark and unsmooth; when the magnesium content is more than 4%, the plating leakage phenomenon is easy to occur.
Therefore, when the contents of aluminum and magnesium are high, the production process is complicated, the specific production process needs to be adjusted, and the production needs to be performed by a solvent protection method or an inert gas protection method in order to suppress the oxidation reaction of magnesium in the hot-dip bath. In addition, the corrosion resistance of the plating layer can be improved and the high-temperature oxidation of magnesium can be prevented by adding proper rare earth elements into the plating solution.
In addition, cerium is an active silver gray metal and is the most abundant rare earth element, lanthanum is second to cerium in the rare earth element, cerium and lanthanum can prevent magnesium from being oxidized, and a covering layer is formed on the surface of the molten metal.
The embodiment of the invention comprises the following steps:
example 1:
a production process of a hot-dip galvanized aluminum-magnesium alloy steel plate comprises the following steps:
putting the zinc ingot into a zinc pot for heating and melting;
putting magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth, wherein the rare earth comprises cerium rare earth and lanthanum rare earth, melting, sampling, performing spectral analysis on the sample, determining each chemical component, then continuously adding zinc ingots, magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth according to the actual content of each component, stirring uniformly, and then performing spectral analysis on the sample until the content requirements of the following components are met:
aluminum: 0.22 percent;
magnesium: 0.55 percent;
cerium: 0.025 percent;
lanthanum: 0.025 percent;
antimony: less than 0.02 percent;
zinc: the rest is carried out;
polishing the steel plate, and then carrying out chromic acid passivation treatment on the front surface;
galvanizing of the steel sheet: the temperature of a zinc pot is kept at 460 ℃, inert gas is input into the top of the zinc pot to create an oxygen-insulated environment, a steel plate is preheated before being put into the pot, the preheating temperature is 465 ℃, annealing is carried out after galvanizing, and the temperature of the steel plate is 675 ℃ during annealing.
Example 2:
a production process of a hot-dip galvanized aluminum-magnesium alloy steel plate comprises the following steps:
putting the zinc ingot into a zinc pot for heating and melting;
putting magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth, wherein the rare earth comprises cerium rare earth and lanthanum rare earth, melting, sampling, performing spectral analysis on the sample, determining each chemical component, then continuously adding zinc ingots, magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth according to the actual content of each component, stirring uniformly, and then performing spectral analysis on the sample until the content requirements of the following components are met:
aluminum: 0.2 percent;
magnesium: 0.5 percent;
cerium: 0.02 percent;
lanthanum: 0.02 percent;
antimony: less than 0.02 percent;
zinc: the rest is carried out;
polishing the steel plate, and then carrying out chromic acid passivation treatment on the front surface;
galvanizing of the steel sheet: the temperature of a zinc pot is kept at 475 ℃, inert gas is input into the top of the zinc pot to create an anaerobic environment, a steel plate is preheated before being put into the pot, the preheating temperature is 525 ℃, annealing is carried out after galvanizing, and the temperature of the steel plate is 725 ℃ during annealing.
Example 3:
a production process of a hot-dip galvanized aluminum-magnesium alloy steel plate comprises the following steps:
putting the zinc ingot into a zinc pot for heating and melting;
putting magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth, wherein the rare earth comprises cerium rare earth and lanthanum rare earth, melting, sampling, performing spectral analysis on the sample, determining each chemical component, then continuously adding zinc ingots, magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth according to the actual content of each component, stirring uniformly, and then performing spectral analysis on the sample until the content requirements of the following components are met:
aluminum: 0.25 percent;
magnesium: 0.6 percent;
cerium: 0.03 percent;
lanthanum: 0.03 percent;
antimony: less than 0.02 percent;
zinc: the rest is carried out;
polishing the steel plate, and then carrying out chromic acid passivation treatment on the front surface;
galvanizing of the steel sheet: keeping the temperature of a zinc pot at 470 ℃, inputting inert gas at the top of the zinc pot to create an oxygen-insulated environment, preheating a steel plate before entering the pot, wherein the preheating temperature is 500 ℃, and annealing is carried out after galvanizing, and the temperature of the steel plate is 700 ℃ during annealing.
In conclusion, according to the hot-dip galvanized aluminum-magnesium alloy steel plate and the production process thereof, the surface of the steel plate is subjected to hot-dip galvanized aluminum-magnesium alloy, so that the corrosion resistance and the structural strength are improved, the adaptability to the environment is improved, the application range is wide, and the production is convenient.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A hot-dip galvanized aluminum-magnesium alloy steel sheet characterized by comprising: the steel plate and the coating on the surface thereof comprise the following components:
aluminum: 0.2-0.25%;
magnesium: 0.5-0.6%;
cerium: 0.02-0.03%;
lanthanum: 0.02-0.03%;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
2. A hot-dip galvanized aluminum-magnesium alloy steel sheet according to claim 1, characterized in that said coating layer comprises the following components:
aluminum: 0.22 percent;
magnesium: 0.55 percent;
cerium: 0.025 percent;
lanthanum: 0.025 percent;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
3. A hot-dip galvanized aluminum-magnesium alloy steel sheet according to claim 1, characterized in that said coating layer comprises the following components:
aluminum: 0.2 percent;
magnesium: 0.5 percent;
cerium: 0.02 percent;
lanthanum: 0.02 percent;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
4. A hot-dip galvanized aluminum-magnesium alloy steel sheet according to claim 1, characterized in that said coating layer comprises the following components:
aluminum: 0.25 percent;
magnesium: 0.6 percent;
cerium: 0.03 percent;
lanthanum: 0.03 percent;
antimony: less than 0.02 percent;
zinc: and the rest is carried out.
5. A process for producing a hot-dip galvanized aluminum-magnesium alloy steel sheet according to claim 1 ~ 4, comprising the steps of:
putting the zinc ingot into a zinc pot for heating and melting;
putting magnesium-zinc alloy ingots, aluminum-zinc alloy ingots and rare earth, melting, sampling, carrying out spectral analysis on the samples, determining each chemical component, then continuously adding the zinc ingots, the magnesium-zinc alloy ingots, the aluminum-zinc alloy ingots and the rare earth according to the actual content of each component, uniformly stirring, and then carrying out spectral analysis on the samples until the content requirements of the components are met;
polishing the steel plate, and then passivating the front side of the steel plate;
and (3) galvanizing the steel plate, namely keeping the temperature of a zinc pot at 460-475 ℃, preheating the steel plate before the steel plate is put into the pot, and annealing the steel plate after galvanizing, wherein the preheating temperature of the steel plate is 465 ~ 525 ℃, and the temperature of the steel plate is 675-725 ℃ during annealing.
6. A process for producing a hot-dip galvanized aluminum-magnesium alloy steel sheet according to claim 5, characterized in that said rare earth includes cerium rare earth and lanthanum rare earth.
7. A process for producing a hot-dip galvanized aluminum-magnesium alloy steel sheet according to claim 5, characterized in that the passivation treatment is chromic acid passivation treatment.
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| CN108950160A (en) * | 2018-08-25 | 2018-12-07 | 马鞍山钢铁股份有限公司 | A kind of Zn-based plating layer hot forming steel and preparation method thereof based on CSP process |
| CN109266814A (en) * | 2018-11-12 | 2019-01-25 | 丹阳市曙光特钢有限公司 | A kind of Wear-resistant corrosion-resistant type special steel and its processing method |
Citations (3)
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| EP0148740A1 (en) * | 1983-12-22 | 1985-07-17 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Method for hot coating and bath composition therefor |
| JPS60169571A (en) * | 1984-02-10 | 1985-09-03 | Ig Tech Res Inc | Enamel coated steel sheet |
| JP2006219716A (en) * | 2005-02-09 | 2006-08-24 | Jfe Galvanizing & Coating Co Ltd | HOT DIP Zn-Al BASED ALLOY PLATED STEEL SHEET AND ITS PRODUCTION METHOD |
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| DE202005022081U1 (en) * | 2004-06-29 | 2013-03-20 | Tata Steel Ijmuiden Bv | Sheet steel with galvanized zinc alloy coating |
| JP4546848B2 (en) * | 2004-09-28 | 2010-09-22 | 新日本製鐵株式会社 | High corrosion-resistant Zn-based alloy plated steel with hairline appearance |
| EP2119804A1 (en) * | 2008-05-14 | 2009-11-18 | ArcelorMittal France | Method of manufacturing a covered metal strip with improved appearance |
| WO2016120671A1 (en) * | 2015-01-30 | 2016-08-04 | Arcelormittal | Method for the production of a coated metal sheet, comprising the application of an aqueous solution containing an amino acid, and associated use in order to improve tribological properties |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0148740A1 (en) * | 1983-12-22 | 1985-07-17 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Method for hot coating and bath composition therefor |
| JPS60169571A (en) * | 1984-02-10 | 1985-09-03 | Ig Tech Res Inc | Enamel coated steel sheet |
| JP2006219716A (en) * | 2005-02-09 | 2006-08-24 | Jfe Galvanizing & Coating Co Ltd | HOT DIP Zn-Al BASED ALLOY PLATED STEEL SHEET AND ITS PRODUCTION METHOD |
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