CN102220588A - Method for producing hot-galvanized color coated steel sheet by continuous annealing - Google Patents
Method for producing hot-galvanized color coated steel sheet by continuous annealing Download PDFInfo
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- CN102220588A CN102220588A CN 201110155676 CN201110155676A CN102220588A CN 102220588 A CN102220588 A CN 102220588A CN 201110155676 CN201110155676 CN 201110155676 CN 201110155676 A CN201110155676 A CN 201110155676A CN 102220588 A CN102220588 A CN 102220588A
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Abstract
The invention discloses a method for producing a hot-galvanized color coated steel sheet by continuous annealing. In the method, an annealing treatment stage is added between a solvent drying stage and a hot galvanizing stage. In the annealing treatment stage, by carrying out annealing treatment on the steel sheet, the hardness of the steel can be increased, cold work hardening can be eliminated, the properties of the steel can be improved and the plastic deformation capability of the steel can be recovered; the residual internal stress in the steel can be eliminated, the tissue can be stabilized and deformation can be prevented; and the tissue and technical components of the steel can be homogenized. Annealing refers to the re-softening on the part subjected to high-degree cold work hardening of steels; and for most of steel belts, the treatment basically refers to recrystallization anneal, therefore the annealed steel sheet not only has good galvanization effect but also improves the processing properties in the later period.
Description
Technical field
The present invention relates to a kind of production method of steel plate, particularly a kind of method of continuous annealing production pot galvanize color-painted steel strip.
Background technology
Pot galvanize is current most widely used metal rust preventing method, develop rapidly along with cold-rolled steel strip, the steel band continuous hot galvanizing has obtained large-scale development. along with the development of society, there is the steel plate of outward appearance effect not only to require anticorrosion, and require attractive in appearance, therefore color bag coated steel belt is just arisen at the historic moment, and obtains develop rapidly.But pot galvanize at present and coloured coating are production lines independently separately, steel band is changed between different production lines, time-consuming taking a lot of work, reduced production efficiency, existing a kind of method (as patent No. ZL03146908.6) that can the zinc-plated printed color steel plate of continuous production, it can make steel plate pot galvanize and colored japanning move continuously by a production line, improved production efficiency, but the aforesaid method light plate is directly zinc-plated after the solvent oven dry, zinc-plated effect can not get guaranteeing, and the processing characteristics in steel plate later stage is not high, can not satisfy people's requirements at the higher level.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides the method for the pot galvanize color-painted steel strip of a kind of zinc-plated effect and good processability.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method of continuous annealing production pot galvanize color-painted steel strip is characterized in that: comprise the steps:
A, steel band enter color-coated printed pretreatment stage, adopt the alkali cleaning pickling to remove impurity such as the greasy dirt of steel strip surface, ferric oxide;
B, the steel band after pretreatment stage enter the solvent treatment stage, and this steel band enters solvent trough, coats solvent in steel strip surface, and be no longer oxidized to guarantee steel strip surface;
C, the steel band after solvent treatment enter the solvent baking stage, send this steel band to stoving oven, the remaining moisture content oven dry of steel strip surface;
D, anneal stage, steel band sent into be heated to certain temperature insulation in the annealing furnace, slowly cooling again;
E, the steel band after annealing enter the pot galvanize stage, send this steel band to the zinc pot, and the reaction of steel band and zinc liquid plates layer of even zinc liquid in steel strip surface in zinc liquid.
Described anneal is in the stage, and the furnace temperature of its annealing furnace is 700
oC～1050
oC, annealing time are 80S～100S.
Described furnace temperature is 1045
oC, annealing time are 90S.
The described anneal stage also comprises the gas purging stage, and this gas purging stage is for to charge into protective gas in annealing furnace heat forward direction annealing furnace.
Described protective gas comprises ammonia decomposing protection gas and nitrogen and hydrogen mixture, and the volume percent content of ammonia decomposing protection gas is 65%～75%, and the volume percent content of nitrogen and hydrogen mixture is 15%～25%.
The invention has the beneficial effects as follows: the present invention has increased the anneal stage in the solvent baking stage and between the pot galvanize stage, the anneal stage by steel plate is carried out the hardness that anneal can reduce steel, eliminate cold hardening, improve the performance of steel, recover the plastic deformation ability of steel; Eliminate the residualinternal stress in the steel, stabilizing tissue prevents distortion; The tissue and the chemical ingredients of even steel.It is softening again that annealing also is that steel are subjected to the part of height cold hardening, for most of steel bands, this processing is recrystallization annealing basically, thereby not only zinc-plated effective but also also improve a lot for the processing characteristics in later stage by the steel plate of anneal.
Embodiment
The invention discloses a kind of method of continuous annealing production pot galvanize color-painted steel strip, comprise the steps:
A, steel band enter color-coated printed pretreatment stage, adopt the alkali cleaning pickling to remove impurity such as the greasy dirt of steel strip surface, ferric oxide;
B, the steel band after pretreatment stage enter the solvent treatment stage, and this steel band enters solvent trough, coats solvent in steel strip surface, and be no longer oxidized to guarantee steel strip surface;
C, the steel band after solvent treatment enter the solvent baking stage, send this steel band to stoving oven, the remaining moisture content oven dry of steel strip surface;
D, anneal stage, steel band sent into be heated to certain temperature insulation in the annealing furnace, slowly cooling again;
E, the steel band after annealing enter the pot galvanize stage, send this steel band to the zinc pot, and the reaction of steel band and zinc liquid plates layer of even zinc liquid in steel strip surface in zinc liquid.
In this specific embodiment, for reaching better annealing effect, the furnace temperature in this annealing process is 1045
oC, annealing time are 90S, and certainly above-mentioned just embodiment is different according to the model of different steel and its corresponding furnace temperature of weight of sending into the steel in the stove also difference and time at every turn in present method, and the furnace temperature of its annealing furnace is 700
oC～1050
oC, annealing time are 80S～100S.
In order to guarantee that steel can not produce severe oxidation in its surface when annealing; thereby the anneal stage also comprises a gas purging stage; this gas purging stage is for charging into protective gas in annealing furnace heat forward direction annealing furnace; most oxygen of extruding in the annealing furnace by the protective gas that charges into prevent the surface of steel plate severe oxidation, and will guarantee that the oxygen volume content in the annealing furnace will be lower than 5/1000000ths.Further; described protective gas comprises ammonia decomposing protection gas and nitrogen and hydrogen mixture; and the volume percent content of ammonia decomposing protection gas is 65%～75%; the volume percent content of nitrogen and hydrogen mixture is 15%～25%; because also have residual minor amounts of oxygen in the annealing furnace; oxygen can be at high temperature produces oxygenizement with the surface of steel plate; form ferric oxide impurity and influence zinc-plated effect; and hydrogen is as a kind of reducing gas; can be at high temperature directly with residual minor amounts of oxygen chemical combination or after the iron oxidation with its reduction; thereby can avoid oxidized fully, thereby guaranteed later zinc-plated and painted effect at the annealing stage steel plate.
Claims (5)
1. the method for a continuous annealing production pot galvanize color-painted steel strip is characterized in that: comprise the steps:
A, steel band enter color-coated printed pretreatment stage, adopt the alkali cleaning pickling to remove impurity such as the greasy dirt of steel strip surface, ferric oxide;
B, the steel band after pretreatment stage enter the solvent treatment stage, and this steel band enters solvent trough, coats solvent in steel strip surface, and be no longer oxidized to guarantee steel strip surface;
C, the steel band after solvent treatment enter the solvent baking stage, send this steel band to stoving oven, the remaining moisture content oven dry of steel strip surface;
D, anneal stage, steel band sent into be heated to certain temperature insulation in the annealing furnace, slowly cooling again;
E, the steel band after annealing enter the pot galvanize stage, send this steel band to the zinc pot, and the reaction of steel band and zinc liquid plates layer of even zinc liquid in steel strip surface in zinc liquid.
2. the method for a kind of continuous annealing production pot galvanize color-painted steel strip according to claim 1 is characterized in that: described anneal is in the stage, and its annealed furnace temperature is 700
oC～1050
oC, be 80S～100S heat-up time.
3. the method for a kind of continuous annealing production pot galvanize color-painted steel strip according to claim 2 is characterized in that: described furnace temperature is 1045
oC, annealing time are 90S.
4. the method for a kind of continuous annealing production pot galvanize color-painted steel strip according to claim 1; it is characterized in that: the described anneal stage also comprises the gas purging stage, and this gas purging stage is for to charge into protective gas in annealing furnace heat forward direction annealing furnace.
5. the method for a kind of continuous annealing production pot galvanize color-painted steel strip according to claim 4; it is characterized in that: described protective gas comprises ammonia decomposing protection gas and nitrogen and hydrogen mixture; and the volume percent content of ammonia decomposing protection gas is 65%～75%, and the volume percent content of nitrogen and hydrogen mixture is 15%～25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110155676 CN102220588A (en) | 2011-06-10 | 2011-06-10 | Method for producing hot-galvanized color coated steel sheet by continuous annealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110155676 CN102220588A (en) | 2011-06-10 | 2011-06-10 | Method for producing hot-galvanized color coated steel sheet by continuous annealing |
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| CN 201110155676 Pending CN102220588A (en) | 2011-06-10 | 2011-06-10 | Method for producing hot-galvanized color coated steel sheet by continuous annealing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740090A (en) * | 2017-10-25 | 2018-02-27 | 苏州华丰不锈钢紧固件有限公司 | A kind of one time punching molded pre-treating technology of bolt |
| CN108468009A (en) * | 2018-05-30 | 2018-08-31 | 浙江康盛股份有限公司 | A kind of compound galvanized pipe and its processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594655A (en) * | 2003-09-17 | 2005-03-16 | 张锦彬 | Method for continuous production of hot galvanizing color-painted steel strip |
| CN101942603A (en) * | 2010-09-28 | 2011-01-12 | 北京科技大学 | 600 MPa-grade ultra-low-silicon cold-rolled hot-galvanized dual-phase steel and preparation process thereof |
| CN101948991A (en) * | 2010-09-21 | 2011-01-19 | 浙江华达钢业有限公司 | Corrosion-resistant hot galvanized steel plate and preparation method thereof |
-
2011
- 2011-06-10 CN CN 201110155676 patent/CN102220588A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594655A (en) * | 2003-09-17 | 2005-03-16 | 张锦彬 | Method for continuous production of hot galvanizing color-painted steel strip |
| CN101948991A (en) * | 2010-09-21 | 2011-01-19 | 浙江华达钢业有限公司 | Corrosion-resistant hot galvanized steel plate and preparation method thereof |
| CN101942603A (en) * | 2010-09-28 | 2011-01-12 | 北京科技大学 | 600 MPa-grade ultra-low-silicon cold-rolled hot-galvanized dual-phase steel and preparation process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《机械工程材料》 20101231 金光灿，等 "退火和卷取温度对590MPa级冷轧热镀锌双相钢板组织与性能的影响" 第13-15页 1-5 第32卷, 第12期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740090A (en) * | 2017-10-25 | 2018-02-27 | 苏州华丰不锈钢紧固件有限公司 | A kind of one time punching molded pre-treating technology of bolt |
| CN108468009A (en) * | 2018-05-30 | 2018-08-31 | 浙江康盛股份有限公司 | A kind of compound galvanized pipe and its processing method |
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Application publication date: 20111019 |