CN104195488A - High-strength galvanized plate and preparation process thereof - Google Patents
High-strength galvanized plate and preparation process thereof Download PDFInfo
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- CN104195488A CN104195488A CN201410469397.9A CN201410469397A CN104195488A CN 104195488 A CN104195488 A CN 104195488A CN 201410469397 A CN201410469397 A CN 201410469397A CN 104195488 A CN104195488 A CN 104195488A
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Abstract
The invention discloses a high-strength galvanized plate and a preparation process thereof. The galvanized plate comprises a processed steel substrate and a galvanized coating covering the surface of the galvanized plate, wherein the yield strength of the galvanized plate is 380-520MPa, the tensile strength is 470-580MPa, and the elongation is greater than or equal to 16%. The preparation process of the high-strength galvanized plate comprises the following steps: heat treatment of the steel substrate: namely carrying out continuous annealing treatment on the steel substrate; preparation of a zinc-plating solution, wherein the zinc-plating solution comprises the following chemical components in percentage by weight: 0.3-0.5% of aluminum, no more than 0.175% of stibium and the balance of zinc; annealing, namely adopting a continuous annealing process to anneal, controlling the annealing temperature at 620-650 DEG C, and controlling the grain size; and hot galvanizing: namely carrying out hot galvanizing after annealing, wherein the preheating temperature of the steel substrate surface is 460-480 DEG C, and the zinc-plating temperature is 460 DEG C. The high-strength galvanized plate has good comprehensive mechanics performance and strong coating adhesion, and can meet the requirements of an automotive panel and a building slab on the safety, light weight and service life.
Description
Technical field
The present invention relates to galvanized sheet field, particularly relate to a kind of high-strength galvanized sheet and preparation technology thereof.
Background technology
Galvanized sheet is that at surface of steel plate, be coated with layer of metal zinc, the steel plate of this zinc coating is called galvanized sheet or steel plate galvanized in order to prevent that surface of steel plate from being corroded, to extend its work-ing life.Galvanized sheet is widely used in the industries such as building, light industry, automobile, household electrical appliances, electronics, farming, animal husbandry and fishery, commodity packaging.In recent years, the industries such as China's building, household electrical appliances are very fast to galvanized sheet demand growth, market potential is larger, especially in recent years along with building developing rapidly of lightweight construction, the increase year by year of car output, a large amount of outlets of extensively universal, joint, Sole Proprietorship's electronic product of household electrical appliance, make the consumption of galvanized sheet increase very fast.By the mode of production, divide, galvanized sheet is divided into heat zinc coating plate and electrolytic galvanized sheet.At present, use the requirement in security, lightness and the work-ing life of plate and building slab for meeting automobile, exploitation high-strength galvanized sheet is very urgent.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of high-strength galvanized sheet and preparation technology thereof, has good comprehensive mechanical property, and coating adhesion is strong, can meet the requirement of automobile with security, lightness and the work-ing life of plate and building slab.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of high-strength galvanized sheet is provided, it is comprised of steel substrate and the surperficial zinc coating being coated with after treatment, yield strength 380 ~ the 520MPa of described galvanized sheet, tensile strength is 470 ~ 580MPa, and elongation is >=16%.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of preparation technology of high-strength galvanized sheet is provided, comprises the following steps:
(1) steel substrate thermal treatment: steel substrate is carried out to continuous annealing processing;
(2) preparation of galvanizing flux: in galvanizing flux, chemical component weight per distribution ratio is aluminium 0.3 ~ 0.5%, antimony≤0.175%, surplus is zinc;
(3) annealing: annealing adopts continuous annealing process, and annealing temperature is controlled at 620～650 ℃, and controls grain fineness number;
(4) pot galvanize: carry out pot galvanize after annealing, 460 ~ 480 ℃ of steel substrate face preheating temperatures, 460 ℃ of zinc-plated temperature.
In a preferred embodiment of the present invention, in step (3), grain fineness number is controlled 7～8 grades.
In a preferred embodiment of the present invention, in step (4), steel substrate heating naked light section temperature is 1000 ~ 1050 ℃.
In a preferred embodiment of the present invention, in step (4), galvanized layer thickness is 0.35 ~ 0.75mm.
The invention has the beneficial effects as follows: the present invention has good comprehensive mechanical property, and coating adhesion is strong, can meet the requirement of automobile with security, lightness and the work-ing life of plate and building slab.
Embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
A high-strength galvanized sheet, it is comprised of steel substrate and the surperficial zinc coating being coated with after treatment, the yield strength 520MPa of described galvanized sheet, tensile strength is 470MPa, elongation is 25%.
The preparation technology of this high-strength galvanized sheet, specifically comprises the following steps:
(1) steel substrate thermal treatment: steel substrate is carried out to continuous annealing processing;
(2) preparation of galvanizing flux: in galvanizing flux, chemical component weight per distribution ratio is aluminium 0.4%, antimony 0.1%, surplus is zinc;
(3) annealing: annealing adopts continuous annealing process, and annealing temperature is controlled at 620 ℃, and controls grain fineness number, grain fineness number is controlled 7～8 grades;
(4) pot galvanize: after annealing, carry out pot galvanize, 480 ℃ of steel substrate face preheating temperatures, 460 ℃ of zinc-plated temperature, steel substrate heating naked light section temperature is 1000 ℃, galvanized layer thickness is 0.52mm.
Embodiment 2
A high-strength galvanized sheet, it is comprised of steel substrate and the surperficial zinc coating being coated with after treatment, the yield strength 380MPa of described galvanized sheet, tensile strength is 470MPa, elongation is 32%.
The preparation technology of this high-strength galvanized sheet, specifically comprises the following steps:
(1) steel substrate thermal treatment: steel substrate is carried out to continuous annealing processing;
(2) preparation of galvanizing flux: in galvanizing flux, chemical component weight per distribution ratio is aluminium 0.3%, antimony 0.175%, surplus is zinc;
(3) annealing: annealing adopts continuous annealing process, and annealing temperature is controlled at 650 ℃, and controls grain fineness number, grain fineness number is controlled 7～8 grades;
(4) pot galvanize: after annealing, carry out pot galvanize, 460 ℃ of steel substrate face preheating temperatures, 460 ℃ of zinc-plated temperature, steel substrate heating naked light section temperature is 1050 ℃, galvanized layer thickness is 0.35mm.
Embodiment 3
A high-strength galvanized sheet, it is comprised of steel substrate and the surperficial zinc coating being coated with after treatment, the yield strength 450MPa of described galvanized sheet, tensile strength is 520MPa, elongation is 16%.
The preparation technology of this high-strength galvanized sheet, specifically comprises the following steps:
(1) steel substrate thermal treatment: steel substrate is carried out to continuous annealing processing;
(2) preparation of galvanizing flux: in galvanizing flux, chemical component weight per distribution ratio is aluminium 0.5%, antimony 0.08%, surplus is zinc;
(3) annealing: annealing adopts continuous annealing process, and annealing temperature is controlled at 630 ℃, and controls grain fineness number, grain fineness number is controlled 7～8 grades;
(4) pot galvanize: after annealing, carry out pot galvanize, 470 ℃ of steel substrate face preheating temperatures, 460 ℃ of zinc-plated temperature, steel substrate heating naked light section temperature is 1000 ℃, galvanized layer thickness is 0.75mm.
High-strength galvanized sheet of the present invention and preparation technology's thereof beneficial effect is: the present invention has good comprehensive mechanical property, and coating adhesion is strong, can meet the requirement of automobile with security, lightness and the work-ing life of plate and building slab.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a high-strength galvanized sheet, is characterized in that, it is comprised of steel substrate and the surperficial zinc coating being coated with after treatment, the yield strength 380 ~ 520MPa of described galvanized sheet, and tensile strength is 470 ~ 580MPa, elongation is >=16%.
2. the preparation technology of high-strength galvanized sheet according to claim 1, is characterized in that, comprises the following steps:
(1) steel substrate thermal treatment: steel substrate is carried out to continuous annealing processing;
(2) preparation of galvanizing flux: in galvanizing flux, chemical component weight per distribution ratio is aluminium 0.3 ~ 0.5%, antimony≤0.175%, surplus is zinc;
(3) annealing: annealing adopts continuous annealing process, and annealing temperature is controlled at 620～650 ℃, and controls grain fineness number;
(4) pot galvanize: carry out pot galvanize after annealing, 460 ~ 480 ℃ of steel substrate face preheating temperatures, 460 ℃ of zinc-plated temperature.
3. preparation technology according to claim 2, is characterized in that, in step (3), grain fineness number is controlled 7～8 grades.
4. preparation technology according to claim 2, is characterized in that, in step (4), steel substrate heating naked light section temperature is 1000 ~ 1050 ℃.
5. preparation technology according to claim 2, is characterized in that, in step (4), galvanized layer thickness is 0.35 ~ 0.75mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410469397.9A CN104195488A (en) | 2014-09-16 | 2014-09-16 | High-strength galvanized plate and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410469397.9A CN104195488A (en) | 2014-09-16 | 2014-09-16 | High-strength galvanized plate and preparation process thereof |
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| CN104195488A true CN104195488A (en) | 2014-12-10 |
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| CN201410469397.9A Pending CN104195488A (en) | 2014-09-16 | 2014-09-16 | High-strength galvanized plate and preparation process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060438A (en) * | 2017-12-01 | 2018-05-22 | 马鞍山市鑫龙特钢有限公司 | A kind of high strength alloy steel forges post-processing approach |
| CN112410710A (en) * | 2020-11-11 | 2021-02-26 | 合肥亿昌兴精密机械有限公司 | Corrosion-resistant high-strength galvanized sheet and galvanized sheet preparation process |
| CN115216716A (en) * | 2022-05-30 | 2022-10-21 | 山东嘉隆新型材料有限公司 | High strength resistance to compression galvanized sheet |
-
2014
- 2014-09-16 CN CN201410469397.9A patent/CN104195488A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060438A (en) * | 2017-12-01 | 2018-05-22 | 马鞍山市鑫龙特钢有限公司 | A kind of high strength alloy steel forges post-processing approach |
| CN112410710A (en) * | 2020-11-11 | 2021-02-26 | 合肥亿昌兴精密机械有限公司 | Corrosion-resistant high-strength galvanized sheet and galvanized sheet preparation process |
| CN115216716A (en) * | 2022-05-30 | 2022-10-21 | 山东嘉隆新型材料有限公司 | High strength resistance to compression galvanized sheet |
| CN115216716B (en) * | 2022-05-30 | 2023-09-08 | 山东嘉隆新型材料有限公司 | High-strength compression-resistant galvanized plate |
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| PB01 | Publication | ||
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Application publication date: 20141210 |