CN102607504B - Method for detecting spangle sizes on surfaces of hot-dipped galvanized sheets on line - Google Patents
Method for detecting spangle sizes on surfaces of hot-dipped galvanized sheets on line Download PDFInfo
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- CN102607504B CN102607504B CN201210051701.9A CN201210051701A CN102607504B CN 102607504 B CN102607504 B CN 102607504B CN 201210051701 A CN201210051701 A CN 201210051701A CN 102607504 B CN102607504 B CN 102607504B
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Abstract
The invention discloses a method for detecting spangle sizes on the surfaces of hot-dipped galvanized sheets on line for improving the detection efficiency and the precision. The method comprises the following steps of: passing continuously produced hot-dipped galvanized sheets through a roughness detector to obtain filtering waviness values; and obtaining the spangle sizes on the surfaces of the hot-dipped galvanized sheets according to the value range of the filtering waviness values. According to the method, the filtering waviness Wca values on the surfaces of the hot-dipped galvanized sheets are detected through the on-line roughness detector to obtain the spangle sizes on the surfaces of the hot-dipped galvanized sheets, and a technical condition is provided for the on-line quick judgment and adjustment of the spangle sizes on the surfaces of the hot-dipped galvanized sheets, particularly for the control of the process speed of the hot-dipped galvanized sheets, so that the uniformity of zinc layers can be reasonably controlled, and the measurement errors of the filtering waviness Wca values can also be furthest reduced so as to improve the detection precision.
Description
Technical field
The invention belongs to steel plate hot immersion plating field, be specifically related to a kind of method that detects heat zinc coating plate surface zinc flower size.
Background technology
Heat zinc coating plate is widely used in production Automobile Plate, appliance plate and building panel.In order to improve corrosion resistivity and the japanning performance of heat zinc coating plate, especially in automobile exterior panel, generally require the crystal habit (being zinc flower) on refinement heat zinc coating plate surface, to reach small zinc flower (between 400 microns to 1 millimeter, naked eyes can be differentiated reluctantly) even spend size class without the zinc of zinc flower (be less than 400 microns, naked eyes are invisible).The technology that detects at present the size of zinc flower mainly contains:
(1) metallographic method.Use machine cuts method, obtain a certain size sample from heat zinc coating plate, after suitable cleaning, grinding and polishing, at the zinc flower pattern of metallography microscope Microscopic observation specimen surface.Choose the visual field that exceedes 10 typical zinc flower patterns, adopt method of scoring or area-method to measure the mean value of zinc flower size.
(2) EBSD method.From using machine cuts method, obtain a certain size sample from heat zinc coating plate, after suitable cleaning, under the scanning electron microscope with EBSD function, obtain the EBSD image of specimen surface.Choose the EBSD image that exceedes 10 typical zinc flower patterns, measure the mean value of zinc flower size.
Above two kinds of technology all cannot realize carries out online real-time detection to quantity-produced heat zinc coating plate surface zinc flower size, and on the whole length direction with steel, sample owing to being difficult to, sampling is difficult to represent the zinc flower Size Distribution of the whole length direction of heat zinc coating plate, therefore has certain hysteresis quality and one-sidedness.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of method of the online detection heat zinc coating plate surface zinc flower size that improves detection efficiency and precision.
Concrete technical scheme is realized by following steps:
The method of a kind of online detection heat zinc coating plate surface zinc flower size, comprise, quantity-produced heat zinc coating plate, by a roughness instrument, is obtained to filtering percent ripple Wca value, according to the span of described filtering percent ripple Wca value, obtain heat zinc coating plate surface zinc flower size.
In technique scheme, when described filtering percent ripple Wca value is less than 0.8 micron, described heat zinc coating plate zinc flower size is less than 400 microns; When described filtering percent ripple value Wca is greater than 1.4 microns, described heat zinc coating plate zinc flower size is greater than 1 millimeter; Described filtering percent ripple Wca value is in the time of 0.8 micron and 1.4 microns, and described heat zinc coating plate zinc flower size is between 400 microns and 1 millimeter.
In technique scheme, described roughness instrument is arranged between the zinc-plated rear shrend operation and polishing operation of described heat zinc coating plate.
In technique scheme, described heat zinc coating plate is 80-130 m/min by the speed of described roughness instrument.
The invention has the beneficial effects as follows: can detect online the surperficial zinc flower size of heat zinc coating plate, have that speed is fast, error is little, reflect comprehensive advantage, make up the slow and representative not strong shortcoming of original detection zinc flower size technologies speed.Detect the filtering percent ripple Wca value on heat zinc coating plate surface by online roughmeter, obtain the zinc flower size on galvanized sheet surface, for online the heat zinc coating plate surface colored size of zinc being judged fast and adjustment provides technical conditions.The particularly control to heat zinc coating plate process speed, can rationally control the homogeneity of zinc layer, again can be at utmost to lower the measuring error of filtering percent ripple Wca value, improve detect accurate.
Accompanying drawing explanation
A kind of online detection heat zinc coating plate surface zinc that Fig. 1 provides for the embodiment of the present invention is spent the system construction drawing of the method for size;
1, stove nose, 2, zinc pot, 3, cooling tower, 4, watch-quench tank, 5, online roughness instrument, 6, polishing machine, 7, hot-dip galvanized steel strip.
A kind of filtering percent ripple Wca value that Fig. 2 provides for the embodiment of the present invention is along the distribution plan with steel length;
8, the schematic diagram of the filtering percent ripple Wca value distribution curve of embodiment 3;
9, the schematic diagram of the filtering percent ripple Wca value distribution curve of embodiment 2;
10, the schematic diagram of the filtering percent ripple Wca value distribution curve of embodiment 1.
Embodiment
Below in conjunction with embodiment, the present invention is further described in detail, the embodiment providing is only in order to illustrate the present invention, rather than in order to limit the scope of the invention.
The system construction drawing of the method for a kind of online detection heat zinc coating plate surface zinc flower size as shown in Figure 1.Quantity-produced band steel 7 enters zinc pot 2 by stove nose 1 and carries out zinc-plated processing.Band steel 7 after zinc-plated solidifies at belt steel surface by the rear zinc liquid of cooling tower 3, forms zinc coat, is with subsequently steel 7 cool to room temperature in watch-quench tank 4.Then be with steel 7 through online roughness instrument 5, this roughmeter can detect the filtering percent ripple Wca value with steel upper and lower surface in real time simultaneously, detect obtain heat zinc coating plate upper and lower surface before polishing in the filtering percent ripple Wca of length direction value along the distribution curve with steel length direction.Band steel 7, by passing through polishing machine 6 after roughness instrument 5, obtains meeting the hot-dip galvanized steel strip product of user's mechanical property and surface quality requirement again.
The reason that the speed of heat zinc coating plate is controlled to the scope of 80-130 m/min is, is difficult to control the homogeneity of zinc layer during lower than 80 ms/min, and during higher than 130 ms/min, the measuring error of on-line measurement filtering percent ripple Wca value increases to and can not ignore.
The reason that online roughness instrument is arranged between shrend and polishing operation is, before shrend, belt steel temperature is too high, is not suitable for measuring roughness, and the impact that after polishing, belt steel surface pattern is received polishing operation causes interference to measuring zinc flower size.
According to the distribution curve of filtering percent ripple Wca value, contrast filtering percent ripple and Wca value and zinc flower size relationship, judge this hot-dip galvanized steel strip zinc flower range of size and distribution of grades along its length.
In the time that filtering percent ripple Wca value is less than 0.8 micron, zinc flower size is less than 400 microns, belongs to without zinc flower rank;
When filtering percent ripple Wca value is during between 0.8 micron and 1.4 microns, zinc flower size, between 400 microns and 1 millimeter, belongs to small zinc flower rank;
In the time that filtering percent ripple Wca value is greater than 1.4 microns, zinc flower size is greater than 1 millimeter, belongs to the even large zinc flower of middle zinc flower rank.
embodiment 1:
Strip speed is controlled at 100 ms/min, and online roughmeter detects to be found, the filtering percent ripple Wca value of whole coiled strip steel is between 0.3-0.7 micron, and result is as shown in Figure 2.This shows that this coiled strip steel surface zinc flower size belongs to without zinc flower rank, can use for outside plate japanning completely.
embodiment 2:
Strip speed is controlled at 90 ms/min, and online roughmeter detects to be found, the filtering percent ripple Wca value of whole coiled strip steel between 0.7-1.2 micron, wherein 0.8-1.0 micron account for steel length whole with more than 80%, as shown in Figure 2 of steel length.This shows that this coiled strip steel surface zinc flower size overwhelming majority belongs to small zinc flower rank, but the zinc flower size overwhelming majority does not exceed 1 millimeter, can use for not high car inner plate and the appliance plate of japanning performance requirement.
embodiment 3:
Strip speed is controlled at 100 ms/min, and online roughmeter detects to be found, the filtering percent ripple Wca value of whole coiled strip steel, at 1.3-2.0 micron, wherein exceedes 1.4 microns account for steel length whole with more than 90%, as shown in Figure 2 of steel length.This shows that this coiled strip steel surface zinc flower size overwhelming majority belongs to middle zinc flower rank, can not be used for Automobile Plate and to the higher appliance plate of japanning performance requirement.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. an online method that detects heat zinc coating plate surface zinc flower size, is characterized in that, comprises, quantity-produced heat zinc coating plate is passed through to a roughness instrument, obtain filtering percent ripple value, according to the span of described filtering percent ripple value, obtain heat zinc coating plate surface zinc flower size.
Wherein, the method that obtains heat zinc coating plate surface zinc flower size is that, when described filtering percent ripple value is less than 0.8 micron, described heat zinc coating plate zinc flower size is less than 400 microns; When described filtering percent ripple value is greater than 1.4 microns, described heat zinc coating plate zinc flower size is greater than 1 millimeter; Described filtering percent ripple value is in the time of 0.8 micron and 1.4 microns, and described heat zinc coating plate zinc flower size is between 400 microns and 1 millimeter.
2. method according to claim 1, is characterized in that, described roughness instrument is arranged between the zinc-plated rear shrend operation and polishing operation of described heat zinc coating plate.
3. according to the arbitrary described method of claim 1-2, it is characterized in that, described heat zinc coating plate is 80-130 m/min by the speed of described roughness instrument.
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| CN201210051701.9A CN102607504B (en) | 2012-03-01 | 2012-03-01 | Method for detecting spangle sizes on surfaces of hot-dipped galvanized sheets on line |
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| CN201210051701.9A CN102607504B (en) | 2012-03-01 | 2012-03-01 | Method for detecting spangle sizes on surfaces of hot-dipped galvanized sheets on line |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI472646B (en) * | 2013-12-09 | 2015-02-11 | China Steel Corp | Rapid identification of defective sources of hot dip galvanized products |
| CN104266619B (en) * | 2014-09-12 | 2017-05-17 | 首钢总公司 | Method for measuring position and density distribution of zinc slag on surface of hot-dip galvanized steel sheet |
| CN104264090A (en) * | 2014-09-28 | 2015-01-07 | 江苏大力神科技股份有限公司 | Zinc spangle controlling device |
| CN108036727A (en) * | 2017-12-12 | 2018-05-15 | 首钢集团有限公司 | A kind of method and device for measuring heat zinc coating plate surface zinc flower size |
| CN108642421A (en) * | 2018-05-15 | 2018-10-12 | 首钢集团有限公司 | A kind of production method of galvanized steel plain sheet |
| CN110527921B (en) * | 2019-10-18 | 2021-03-16 | 山东钢铁集团日照有限公司 | Control method for surface appearance of hot-galvanized ultra-deep drawing steel for automobile panel |
| CN115233129A (en) * | 2022-07-18 | 2022-10-25 | 首钢京唐钢铁联合有限责任公司 | Control method and device for hot galvanizing of strip steel and strip steel |
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| JP2005091266A (en) * | 2003-09-19 | 2005-04-07 | Nisshin Steel Co Ltd | Spangle size measuring device |
| JP4299619B2 (en) * | 2003-09-19 | 2009-07-22 | 日新製鋼株式会社 | Spangle size control system |
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| CN101050959A (en) * | 2007-04-30 | 2007-10-10 | 浙江建设职业技术学院 | Juding method for for measuring effictiveness of large size structure surface contour curve roughness coefficient |
| CN101650170A (en) * | 2009-07-24 | 2010-02-17 | 上海宏力半导体制造有限公司 | Detection method of wafer surface roughness |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |