CN105063534B - A kind of belt steel surface fleck defect control method - Google Patents
A kind of belt steel surface fleck defect control method Download PDFInfo
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- CN105063534B CN105063534B CN201510579997.5A CN201510579997A CN105063534B CN 105063534 B CN105063534 B CN 105063534B CN 201510579997 A CN201510579997 A CN 201510579997A CN 105063534 B CN105063534 B CN 105063534B
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Abstract
The invention discloses a kind of belt steel surface fleck defect control method, enters applied to strip in the technological process that zinc pot carries out galvanizing, solves the technical problem that existing hot dip galvanizing process production think gauge hot dip zinc product easily forms fleck defect.This method comprises the following steps：For produce zinc coating thickness >=Z180 galvanized sheets strip enter zinc pot before, the speed of service of strip is raised speed to First Speed value；Judge whether the current speed of service of strip is less than First Speed threshold value；If judging result shows that the current speed of service is less than First Speed threshold value, according to air knife distance will be reduced to pre-determined distance section in the zinc-plated thickness of belt steel surface, and air knife jetting pressure is reduced to preset pressure value according to zinc-plated thickness；Strip carries out galvanizing by zinc pot.Improve the quality of hot dip zinc product.
Description
Technical field
The present invention relates to hot dip galvanizing process technical field, more particularly to a kind of belt steel surface fleck defect control method.
Background technology
In recent years, as the continuous improvement of hot dip galvanizing substrate surface quality, hot dip galvanizing steel plate coating surface quality also obtain
Very big improvement.But in the production process of hot dip zinc product, the surface quality of zinc layers still exposes many problems, bright spot
Defect seriously affects hot-dip galvanized steel strip surface quality so that galvanized sheet as a kind of typical thickness coating galvanized plate surface defect
It is difficult to the requirement for meeting high-end zinc-plated panel products such as appliance plate.
During hot dip galvanizing process, strip enters zinc pot after annealing furnace, and strip will be covered in it when going out zinc pot
The zinc liquid band on surface goes out.In order to ensure to obtain the coating of suitable thickness, belt steel surface zinc liquid is purged using air knife, is allowed more
Remaining zinc liquid is back in zinc pot.But the general air knife jet length of thickness coating galvanized sheet is larger, air pressure is smaller, therefore existing
There is hot dip galvanizing process production think gauge hot dip zinc product easily to form fleck defect, make a big impact to strip surface quality.
The content of the invention
It is an object of the invention to provide a kind of belt steel surface fleck defect control method, to solve existing hot dip galvanizing process
Production think gauge hot dip zinc product easily forms the technical problem of fleck defect.
A kind of belt steel surface fleck defect control method provided in an embodiment of the present invention, carries out applied to strip into zinc pot
In the technological process of galvanizing, described method includes following steps：In the strip for producing zinc coating thickness >=Z180 galvanized sheets
Into before the zinc pot, the speed of service of the strip is raised speed to First Speed value；Judge the current operation speed of the strip
Whether degree is less than First Speed threshold value；If judging result shows that the current speed of service is less than the First Speed threshold value,
According to air knife distance will be reduced to pre-determined distance section in the zinc-plated thickness of the belt steel surface, and according to the zinc-plated thickness
Air knife jetting pressure is reduced to preset pressure value；The strip carries out galvanizing by the zinc pot.
Preferably, the First Speed threshold value is 85~90m/min.
Preferably, the pre-determined distance section is less than 15mm.
Preferably, the preset pressure value is less than 150mbar.
One or more technical solution provided in an embodiment of the present invention, at least has the following technical effect that and advantage：
The embodiment of the present invention produces thickness coating strip by improving the speed of service of strip, so as to avoid easily producing
The air knife technological parameter section of raw bright spot, solves existing hot dip galvanizing process production think gauge hot dip zinc product and easily forms bright spot
The technical problem of defect, improves the quality of hot dip zinc product.It cannot be more than setting speed for the speed of service for improving strip
The situation of threshold value, also using ancillary technique means：According to by the zinc-plated thickness of belt steel surface reduce air knife distance to it is default away from
From section, and according to air knife jetting pressure will be reduced to preset pressure value in the zinc-plated thickness of belt steel surface, so as to ensure that nothing
The strip that method raises speed to First Speed threshold value can also obtain suitable thickness of coating.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the flow chart of belt steel surface fleck defect control method in the embodiment of the present invention.
Embodiment
In order to solve the technical problem that existing hot dip galvanizing process production think gauge hot dip zinc product easily forms fleck defect,
An embodiment of the present invention provides a kind of belt steel surface fleck defect control method, general thought are as follows：
For produce zinc coating thickness >=Z180 galvanized sheets strip enter the zinc pot before, the speed of service of strip is carried
Speed is to First Speed value；The situation for being less than First Speed threshold value after raising speed to First Speed value also takes adjustment air knife technique ginseng
Several supplementary means.
Above-mentioned technical proposal, thickness coating strip is produced by improving the speed of service of strip, so as to avoid easily
Produce the air knife technological parameter section of bright spot, solve existing hot dip galvanizing process production think gauge hot dip zinc product easily formed it is bright
The technical problem of point defect, improves the quality of hot dip zinc product.It cannot be more than setting speed for the speed of service for improving strip
The situation of threshold value is spent, also using ancillary technique means：According to air knife distance will be reduced to default in the zinc-plated thickness of belt steel surface
Apart from section, and according to air knife jetting pressure will be reduced to preset pressure value in the zinc-plated thickness of belt steel surface, so as to ensure that
The strip that can not be raised speed to First Speed threshold value can also obtain suitable thickness of coating.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without creative efforts, belong to the scope of protection of the invention.
An embodiment of the present invention provides a kind of belt steel surface fleck defect control method, is carried out applied to strip into zinc pot
In the technological process of galvanizing, refering to what is shown in Fig. 1, the belt steel surface fleck defect control method includes the following steps：
S101, for produce zinc coating thickness >=Z180 galvanized sheets strip enter zinc pot before, by the speed of service of strip
Raise speed to First Speed value.In specific implementation process, the thickness specification of galvanized sheet influences First Speed value, specifically, the
One velocity amplitude by with production galvanized sheet thickness specification corresponding to can reach the maximal rate in zinc pot., galvanized sheet production
The thickness of product is bigger, and the First Speed value to raise speed will be smaller.For example the galvanized sheet of thickness specification Z180 can reach in zinc pot
The maximum operational speed arrived is 90m/min, then when producing the galvanized sheet of thickness specification Z180, by strip before strip enters zinc pot
The speed of service raise speed to 90m/min.Again for example, the galvanized sheet of thickness specification Z470 attainable maximum operation speed in zinc pot
Spend for 84m/min, then when producing the galvanized sheet of thickness specification Z470, the speed of service of strip raises speed before strip enters zinc pot
To 84m/min.
S102, judge whether the current speed of service of strip is less than First Speed threshold value.Specifically, First Speed threshold value is
85~90m/min, preferably, selection First Speed threshold value is 90m/min, strip speed is controlled in more than 90m/min,
Perform after S101 raises speed strip to First Speed value and detect the current speed of service, the current speed of service that will be detected
Compared with First Speed threshold value, judge whether the current speed of service is less than First Speed threshold value.Due to the thickness of galvanized sheet
Degree is bigger, and First Speed value is smaller, and therefore, if the thickness for the galvanized sheet to be produced reaches certain, strip speed-raising cannot obtain
The First Speed value of First Speed threshold value must be greater than or equal to, therefore be directed to such case, it is necessary to perform following S103.If strip
Speed-raising can obtain the First Speed value more than or equal to First Speed threshold value, then It is not necessary to perform S103.
If S103, judging result show that the current speed of service is less than First Speed threshold value, according to will be plated in belt steel surface
The thickness of zinc reduces air knife distance to pre-determined distance section, and reduces air knife jetting pressure to preset pressure according to zinc-plated thickness
Value.
In specific implementation process, pre-determined distance section need to be less than 15mm, and preset pressure value need to be less than 150mbar.
S104, strip carry out galvanizing by zinc pot.
To clearly demonstrate technical solution provided by the present invention, if First Speed threshold value is 90m/min, the present invention carries
Supply for the galvanized sheet that production zinc coating thickness is two kinds of thickness specifications of Z180, Z275, the substrate thickness of galvanized sheet is 2.0mm
Specific production instance.
Strip is raised speed to First Speed value, detects that the current speed of service of strip is equal to 90m/min, meets to be equal to
90m/min, then the technological parameter such as air knife distance, air knife jetting pressure is with reference to shown in table 1 below, and with traditional hot dip galvanizing process
Parameter is contrasted.
The technological parameter contrast of table 1.Z180 galvanized sheets
From the contrast of table 1 as can be seen that using belt steel surface fleck defect control method in the embodiment of the present invention can be with
Effectively remove Z180 galvanized sheet surface black band defects.
It will raise speed before the strip of production zinc coating thickness Z275 enters zinc pot to First Speed value, and detect current operation speed
Degree is equal to 90m/min, and satisfaction is equal to 90m/min, then the technological parameter such as air knife distance, air knife jetting pressure is referred to shown in table 2 below,
And contrasted traditional for production Z275 hot dip galvanizing process parameters.
The technological parameter contrast of table 2.Z275 galvanized sheets
From the contrast of table 2 as can be seen that using belt steel surface fleck defect control method in the embodiment of the present invention can be with
Effectively remove Z275 galvanized sheet surface black band defects.
Raise speed for Z470 galvanized sheets to First Speed value, detect that the current speed of service of Z470 galvanized sheets is equal to 84m/
Min, 84m/min<90m/min then reduces air knife distance to pre-determined distance section according to the zinc coating thickness of the belt steel surface, and
Air knife jetting pressure is reduced to preset pressure value according to zinc coating thickness, specifically, the technique such as air knife distance, air knife jetting pressure is joined
Number is contrasted traditional parameter for Z470 hot dip galvanizing process with reference to shown in table 2 below.
The parameter comparison of table 3.Z470 galvanized sheets
From the contrast of table 3 as can be seen that using belt steel surface fleck defect control method in the embodiment of the present invention can be with
Effectively remove Z470 galvanized sheet surface black band defects.
The embodiment of the present invention produces thickness coating strip by improving the speed of service of strip, so as to avoid easily producing
The air knife technological parameter section of raw bright spot, solves existing hot dip galvanizing process production think gauge hot dip zinc product and easily forms bright spot
The technical problem of defect, improves the quality of hot dip zinc product.It cannot be more than setting speed for the speed of service for improving strip
The situation of threshold value, also using ancillary technique means：According to by the zinc-plated thickness of belt steel surface reduce air knife distance to it is default away from
From section, and according to air knife jetting pressure will be reduced to preset pressure value in the zinc-plated thickness of belt steel surface, so as to ensure that nothing
The strip that method raises speed to First Speed threshold value can also obtain suitable thickness of coating.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (2)
1. a kind of belt steel surface fleck defect control method, enters applied to strip in the technological process that zinc pot carries out galvanizing,
It is characterized in that, for removing galvanized sheet surface black band defect, described method includes following steps：
For produce zinc coating thickness >=Z180 galvanized sheets strip enter the zinc pot before, the speed of service of the strip is carried
Speed to First Speed value, the First Speed value by with production galvanized sheet thickness specification corresponding to can reach in zinc pot
Maximal rate；
Judge whether the current speed of service of the strip is less than First Speed threshold value；
If judging result shows that the current speed of service is less than the First Speed threshold value, according to will be in the belt steel surface
Zinc-plated thickness reduces air knife distance to pre-determined distance section, and reduces air knife jetting pressure to pre- according to the zinc-plated thickness
If pressure value, the pre-determined distance section is less than 15mm, and the preset pressure value is less than 150mbar；
The strip carries out galvanizing by the zinc pot.
2. belt steel surface fleck defect control method as claimed in claim 1, it is characterised in that the First Speed threshold value is
85~90m/min.
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| CN107179749B (en) * | 2016-03-11 | 2019-10-15 | 宝钢湛江钢铁有限公司 | Hot dip zinc product whole process method of quality control |
| CN111534774A (en) * | 2020-04-29 | 2020-08-14 | 鞍钢股份有限公司 | Method for reducing hot galvanizing zinc flow ripple defects |
| CN113755773B (en) * | 2021-08-12 | 2023-08-25 | 唐山钢铁集团高强汽车板有限公司 | Control method for surface quality of thick-specification thick-coating zinc-aluminum-magnesium strip steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160766A (en) * | 2013-03-23 | 2013-06-19 | 鞍钢股份有限公司 | Method for controlling size of spangles |
| CN103205665A (en) * | 2012-01-13 | 2013-07-17 | 鞍钢股份有限公司 | An automatic control method for zinc layer thickness in a continuous hot galvanizing zinc line |
| CN103695830A (en) * | 2013-12-20 | 2014-04-02 | 鞍钢股份有限公司 | Coating thickness control method in hot galvanizing production process |
| CN103966537A (en) * | 2014-04-21 | 2014-08-06 | 鞍钢股份有限公司 | Method for controlling zinc flow ripples of heavy-weight material and thick-coating hot-galvanizing products |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10146791A1 (en) * | 2001-09-20 | 2003-04-10 | Sms Demag Ag | Method and device for coating the surface of strand-like metallic material |
-
2015
- 2015-09-11 CN CN201510579997.5A patent/CN105063534B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205665A (en) * | 2012-01-13 | 2013-07-17 | 鞍钢股份有限公司 | An automatic control method for zinc layer thickness in a continuous hot galvanizing zinc line |
| CN103160766A (en) * | 2013-03-23 | 2013-06-19 | 鞍钢股份有限公司 | Method for controlling size of spangles |
| CN103695830A (en) * | 2013-12-20 | 2014-04-02 | 鞍钢股份有限公司 | Coating thickness control method in hot galvanizing production process |
| CN103966537A (en) * | 2014-04-21 | 2014-08-06 | 鞍钢股份有限公司 | Method for controlling zinc flow ripples of heavy-weight material and thick-coating hot-galvanizing products |
Non-Patent Citations (1)
| Title |
|---|
| 热镀锌亮点缺陷成因及其预防;郭太雄等;《轧钢》;20120815;第29卷(第4期);第56-60页 * |
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