CN103334072A - Galvanizing method for hot galvanized steel plate - Google Patents
Galvanizing method for hot galvanized steel plate Download PDFInfo
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- CN103334072A CN103334072A CN 201310236866 CN201310236866A CN103334072A CN 103334072 A CN103334072 A CN 103334072A CN 201310236866 CN201310236866 CN 201310236866 CN 201310236866 A CN201310236866 A CN 201310236866A CN 103334072 A CN103334072 A CN 103334072A
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- steel plate
- hot
- plating bath
- dip galvanizing
- galvanizing
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Abstract
The invention relates to a galvanizing method for a hot galvanized steel plate, belonging to the field of galvanizing processes of steel plates. The steel plate is pickled and annealed, then hot galvanizing operation is performed, and the galvanizing method is characterized in that, during the hot galvanizing operation process, when the steel plate enters a plating bath, the temperature of the steel plate is 455-465 DEG C, the temperature of the plating bath in a zinc pot is 450-460 DEG C, the Fe content in the plating bath is less than 0.03%, the Al content in the plating bath is 0.21-0.25%, the speed of a unit is 100-110m/min, the cooling rate of the steel plate is 0-2%, and the high-span temperature is 235-245 DEG C. According to the conditions of the hot galvanizing process disclosed by the invention, an Fe-Al intermediate transition layer between a base material of the steel plate and a galvanized layer can prevent the mutual diffusion of Fe and Zn, so that the formation of an Fe-Zn alloy layer is reduced, the adhesion of the plated layer of the hot galvanized steel plate is improved, and the phenomena of shedding, peeling and the like of zinc powder of the plated layer can be reduced; according to the conditions of the hot galvanizing process disclosed by the invention, the grain orientation of the plated layer of the hot galvanized steel plate is optimized, and the scratch resistance, the wear resistance and the adhesion performance of the plated layer are obviously improved.
Description
Technical field
The invention provides a kind of galvanized method of hot-dip galvanizing sheet steel, belong to steel plate zincincation field.
Background technology
Hot-dip galvanizing sheet steel since its excellent corrosion resisting performance, good coating performance and clean outer present household electrical appliance, body of a motor car use widely with having obtained in the production such as plate.The requirement that hot dip is stopped steel plate coating is the strong adhesion of coating and substrate, does not come off during the punching press distortion, in addition good welding property, corrosion resistance nature and phosphorus characteristic will be arranged, with the erosion resistance after guaranteeing paint film adhesion and painting.Yet there is the efflorescence of coating in hot-dip galvanizing sheet steel and problem such as peels off in the punch process process of practical application, and the destruction of having caused coating further has influence on the erosion resistance of coating and the property removed.
Make the surface form the tack of being improved coating and base steel by membrane technique by the composition of change steel plate or by the surfaceness of controlling hot-dip galvanizing sheet steel in the prior art, but do not obtain effect preferably, also do not occur at present by the composition of control coating and the method that weave construction is improved the tack of coating and base steel.
Summary of the invention
According to above deficiency of the prior art, problem to be solved by this invention is: the galvanized method that a kind of hot-dip galvanizing sheet steel of strong adhesion is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of galvanized method of hot-dip galvanizing sheet steel, steel plate carries out the pot galvanize operation after pickling, annealing, it is characterized in that: in the pot galvanize operating process, steel billet temperature is 455～465 ℃ when going into plating bath, and the plating bath temperature is 450～460 ℃ in the zinc pot, Fe content＜0.03% in the plating bath, Al content in the plating bath: 0.21～0.25%, unit speed: 100～110m/min, the steel plate rate of cooling is 0-2%, height is striden temperature: 235～245 ℃.
Wherein preferred version is:
Described steel plate contains C:0.05～0.06% by weight percentage, Mn:0.01～0.03%, and Si:0.19～0.30%, P:0.006～0.019%, S:0.009～0.020%, Al:0.02～0.07%, all the other are Fe.
Described steel plate thickness is 0.5mm.
Described zinc-plated back zinc layer weight is 180～195g/m
2, the zinc laminar surface is through SiO
2Passivation Treatment.
Described steel plate is cooled to naturally cooling.
Described steel plate is cooled to air-cooled, and rate of cooling is 1%.
Compared with prior art, the beneficial effect that the galvanized method of this hot-dip galvanizing sheet steel has is: (1) hot dip shut-down of the present invention skill condition makes substrate of steel plate and the Fe-Al intermediate layer of diction between the coating can stop phase mutual diffusion between Fe, the Zn, reduce the formation of Fe-Zn alloy layer, improved the tack of hot dip galvanizing steel plate coating, coating is taken leave phenomenons such as powder comes off, peels off and is reduced;
(2) hot dip galvanizing process condition of the present invention makes the coating grain orientation optimization of hot-dip galvanizing sheet steel, and anti-zoned property, wear resistance and the adhesion property of coating obviously improve;
(3) hot dip galvanizing production process of the present invention is simple, and cost is lower.
Embodiment
Below the present invention will be further described:
Embodiment 1:
Steel plate carries out the pot galvanize operation after pickling, annealing, it is characterized in that: in the pot galvanize operating process, steel billet temperature is 455～465 ℃ when going into plating bath, the plating bath temperature is 450～460 ℃ in the zinc pot, Fe content＜0.03% in the plating bath, Al content in the plating bath: 0.21～0.25%, unit speed: 100～110m/min, the steel plate rate of cooling is 0-2%, and height is striden temperature: 235～245 ℃.
Steel plate contains C:0.05～0.06% by weight percentage, Mn:0.01～0.03%, and Si:0.19～0.30%, P:0.006～0.019%, S:0.009～0.020%, Al:0.02～0.07%, all the other are Fe.
Steel plate thickness is 0.5mm.
Described zinc-plated back zinc layer weight is 180～195g/m
2, the zinc laminar surface is through SiO
2Passivation Treatment.
Embodiment 2:
On the basis of embodiment 1, described steel plate is cooled to naturally cooling.
Embodiment 3:
On the basis of above embodiment, described steel plate is cooled to air-cooled, and rate of cooling is 1%.
Claims (6)
1. the galvanized method of a hot-dip galvanizing sheet steel, steel plate carries out the pot galvanize operation after pickling, annealing, it is characterized in that: in the pot galvanize operating process, steel billet temperature is 455～465 ℃ when going into plating bath, and the plating bath temperature is 450～460 ℃ in the zinc pot, Fe content＜0.03% in the plating bath, Al content in the plating bath: 0.21～0.25%, unit speed: 100～110m/min, the steel plate rate of cooling is 0-2%, height is striden temperature: 235～245 ℃.
2. the galvanized method of hot-dip galvanizing sheet steel according to claim 1, it is characterized in that: described steel plate by weight percentage, contain C:0.05～0.06%, Mn:0.01～0.03%, Si:0.19～0.30%, P:0.006～0.019%, S:0.009～0.020%, Al:0.02～0.07%, all the other are Fe.
3. the galvanized method of hot-dip galvanizing sheet steel according to claim 1 and 2, it is characterized in that: described steel plate thickness is 0.5mm.
4. the galvanized method of hot-dip galvanizing sheet steel according to claim 1 is characterized in that: described zinc-plated back zinc layer weight is 180～195g/m
2, the zinc laminar surface is through SiO
2Passivation Treatment.
5. the galvanized method of hot-dip galvanizing sheet steel according to claim 1, it is characterized in that: described steel plate is cooled to naturally cooling.
6. the galvanized method of hot-dip galvanizing sheet steel according to claim 1, it is characterized in that: described steel plate is cooled to air-cooled, and rate of cooling is 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310236866 CN103334072A (en) | 2013-06-14 | 2013-06-14 | Galvanizing method for hot galvanized steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310236866 CN103334072A (en) | 2013-06-14 | 2013-06-14 | Galvanizing method for hot galvanized steel plate |
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| CN103334072A true CN103334072A (en) | 2013-10-02 |
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| CN 201310236866 Pending CN103334072A (en) | 2013-06-14 | 2013-06-14 | Galvanizing method for hot galvanized steel plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950988A (en) * | 2016-05-18 | 2016-09-21 | 常熟风范电力设备股份有限公司 | Steel plate used for communication tower and galvanization method of steel plate |
| CN109082620A (en) * | 2017-06-14 | 2018-12-25 | 宿迁市三石包装容器有限公司 | A kind of novel steel barrel production technology |
-
2013
- 2013-06-14 CN CN 201310236866 patent/CN103334072A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950988A (en) * | 2016-05-18 | 2016-09-21 | 常熟风范电力设备股份有限公司 | Steel plate used for communication tower and galvanization method of steel plate |
| CN109082620A (en) * | 2017-06-14 | 2018-12-25 | 宿迁市三石包装容器有限公司 | A kind of novel steel barrel production technology |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20131002 |