CN103639209B - A kind of very thin color coating base-material cold-rolled plate shape control method - Google Patents
A kind of very thin color coating base-material cold-rolled plate shape control method Download PDFInfo
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- CN103639209B CN103639209B CN201310710191.6A CN201310710191A CN103639209B CN 103639209 B CN103639209 B CN 103639209B CN 201310710191 A CN201310710191 A CN 201310710191A CN 103639209 B CN103639209 B CN 103639209B
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Abstract
The present invention relates to a kind of very thin color coating base-material cold-rolled plate shape control method, comprise the steps: the selection of very thin color coating base-material hot rolling raw material: it is 40 ± 20um that convexity requires, or, 45 ± 20um, or, 50 ± 20um, and, wedge degree requirement≤20um; Evaluate the high/concave point in band steel cross section local; Adopt micro-middle unrestrained Schema control to increase in the middle part of band steel to extend; Evaluate cold rolling color coating base-material plate shape: band steel is divided into A, B two measured zone in the width direction, respectively the high difference of wave of arbitrary neighborhood 3 in A district and B district is evaluated.The present invention significantly can improve cold rolling process belt plate shape control ability, effective control cincture steel middle muscle, middle part fillet wave defect.
Description
Technical field
The present invention relates to a kind of very thin color coating base-material cold-rolled plate shape control method, be specifically related to belong to use CSP hot rolling raw material, produce very thin color coating base-material Strip Shape Control technology at pickling cold continuous rolling production line.
Background technology
The need of production of Coil Coating Products is through hot rolling, pickling cold continuous rolling, zinc-plated, color coating four production processes, and very thin Coil Coating Products requires very high to strip shape quality, and the slight flatness defect of raw material will cause the unequal defect of Coil Coating Products holiday, coating.Cold rolling process is very large on the strip shape quality impact that Coil Coating Products is final.Horse steel pickling cold continuous rolling production line unit is four frame tandem rollings, and milling train is six roller UCM milling trains.Due to horse steel rolling mill production line very thin thin slab product production shape wave control ability stability, belt plate shape improves indifferent, causes very thin swelling rib in central section of color coating base material, fillet wave defect serious.
Summary of the invention
The object of the present invention is to provide a kind of very thin color coating base-material cold-rolled plate shape control method, improve cold rolling process belt plate shape control ability, effective control cincture steel middle muscle, middle part fillet wave defect.
Concrete technical scheme is as follows:
A kind of very thin color coating base-material cold-rolled plate shape control method, comprises the steps:
(1) selection of very thin color coating base-material hot rolling raw material: it is 40 ± 20um that convexity requires, or, 45 ± 20um, or, 50 ± 20um, and, wedge degree requirement≤20um;
(2) high/concave point in band steel cross section local is evaluated;
(3) adopt micro-middle unrestrained Schema control to increase in the middle part of band steel to extend;
(4) evaluate cold rolling color coating base-material plate shape: band steel is divided into A, B two measured zone in the width direction, respectively the high difference of wave of arbitrary neighborhood 3 in A district and B district is evaluated.
Further, comprise step further: (5) evaluation result when step (2) and/or (4) meets the demands, then continue to produce, the evaluation result when step (2) and/or (4) meets failed call, then adjust according to evaluation result.
Further, step (2) is specially: on the cross section vertical with rolling direction, in mid point both sides ± 200mm interval, and belt steel thickness difference≤20um; Outside mid point ± 200mm interval, the high/low local in the wide datum line of band steel plate is high/concave point requirement≤12um.
Further, adopt micro-middle unrestrained Schema control in step (1), increase in the middle part of band steel and extend, yield value is set to 6.
Further, select further in step (1) to require glacing flatness≤± 50I, qualification rate >=80% on strip length direction.
Further, in step (1), H is base-material thickness, and as H≤1.8mm, convexity requires 40 ± 20um, 1.8mm < H≤2.0mm, and convexity requires 45 ± 20um, 2.0mm < H≤2.2mm, and convexity requires 50 ± 20um.
Further, in step (4), two Region dividing modes are, adopt horizontal X-axis and longitudinal Y-axis, being positioned at Y-axis on the occasion of area part is A district, is positioned at Y-axis negative territory part B district.
Further, in step (4): steel is with for thickness h≤0.6mm, require horizontal arbitrary neighborhood three high difference≤8I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤8I of some wave in B region; Steel is with for thickness 0.6 < h≤1.0mm, requires horizontal arbitrary neighborhood three high difference≤10I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤10I of some wave in B region; Steel is with for thickness h > 1.0mm, requires horizontal arbitrary neighborhood three high difference≤12I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤12I of some wave in B region.
Compared with currently available technology, the present invention significantly can improve cold rolling process belt plate shape control ability, effective control cincture steel middle muscle, middle part fillet wave defect.Thus reduce swelling rib in central section of color coating base material, middle part fillet wave defect, improve color coating product quality, decrease the loss of product strip shape quality.The cold rolling color coating base-material adopting the present invention to produce, owing to specify that production process system, specify that hot rolling raw material plate shape technical requirement, specification evaluation cold-rolled strip steel shape quality condition, reduces color coating product strip shape quality defect.Because of middle muscle fall, middle part fillet wave defect demote zinc-plated paper-thin strip outgoing ratio from the highest moon 25%, average 7.76% reduces to monthly average 0.2%, obtains great economic benefit.
Accompanying drawing explanation
Fig. 1 is band steel A, B of the present invention two measured zone schematic diagrames
Detailed description of the invention
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in numerous embodiments of the present invention.
In order to specification very thin color coating base-material cold continuous rolling operation production process system, specify cold rolling process and produce the requirement of very thin color coating base-material shape control technology, present embodiment discloses horse steel ultrathin cold-rolled color coating production technology of base stock system and the requirement of cold mill complex color coating base-material shape control technology.
Following production process system and control overflow are all determined by a large amount of production practices and test, and the production control technology of ultrathin cold-rolled color coating base-material and shape control technology require to be described below:
A) very thin color coating base-material is produced and is adopted micro-middle unrestrained Schema control, and increase in the middle part of band steel and extend, yield value is set to 6;
B) very thin color coating base-material hot rolling raw material technical requirement:
The main convexity to raw material, wedge degree, glacing flatness and cross section local high (recessed) point four large technical indicators claim:
Convexity requires: H≤1.8mm:40 ± 20um; 1.8mm < H≤2.0mm:45 ± 20um; 2.0mm < H≤2.2mm:50 ± 20um;
Wedge degree requires :≤20um;
Flatness requirements≤± 50I, qualification rate >=80% on strip length direction;
Local high spot: on the cross section vertical with rolling direction, in mid point both sides ± 200mm interval, belt steel thickness difference≤20um; Outside mid point ± 200mm interval, high (low) is in local high (recessed) some requirement≤12um of the wide datum line of band steel plate;
C) cold rolling color coating base-material shape control technology requires: in the width direction band steel is divided into A, B two measured zone (as shown in Figure 1), evaluates respectively to the high difference of wave of arbitrary neighborhood 3 in A district and B district.
Steel is with for thickness h≤0.6mm, requires horizontal arbitrary neighborhood three high difference≤8I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤8I of some wave in B region;
Steel is with for thickness 0.6 < h≤1.0mm, requires horizontal arbitrary neighborhood three high difference≤10I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤10I of some wave in B region;
Steel is with for thickness h > 1.0mm, requires horizontal arbitrary neighborhood three high difference≤12I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤12I of some wave in B region;
The cold rolling color coating base-material adopting the present invention to produce, owing to specify that production process system, specify that hot rolling raw material plate shape technical requirement, specification evaluation cold-rolled strip steel shape quality condition, reduces color coating product strip shape quality defect.Because of middle muscle fall, middle part fillet wave defect demote zinc-plated paper-thin strip outgoing ratio from the highest moon 25%, average 7.76% reduces to monthly average 0.2%, obtains great economic benefit.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method of the present invention is conceived and technical scheme is carried out; or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (2)
1. a very thin color coating base-material cold-rolled plate shape control method, is characterized in that, comprise the steps:
(1) selection of very thin color coating base-material hot rolling raw band steel: it is 40 ± 20um that convexity requires, or, 45 ± 20um, or, 50 ± 20um, and, wedge degree requirement≤20um; Flatness requirements≤± 50I, qualification rate >=80% on strip length direction;
(2) high/concave point in band steel cross section local is evaluated: on the cross section vertical with rolling direction, in mid point both sides ± 200mm interval, belt steel thickness difference≤20um; Outside mid point ± 200mm interval, the high/low local in the wide datum line of band steel plate is high/concave point requirement≤12um;
(3) adopt micro-middle unrestrained Schema control to increase in the middle part of band steel to extend;
(4) cold rolling color coating base-material plate shape is evaluated: band steel is divided into A, B two measured zone in the width direction, respectively the high difference of wave of arbitrary neighborhood 3 in A district and B district is evaluated, two Region dividing modes are, adopt horizontal X-axis and longitudinal Y-axis, be positioned at Y-axis on the occasion of area part be A district, being positioned at Y-axis negative territory part is B district, is with steel for thickness h≤0.6mm, requires horizontal arbitrary neighborhood three high difference≤8I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤8I of some wave in B region; Steel is with for thickness 0.6 < h≤1.0mm, requires horizontal arbitrary neighborhood three high difference≤10I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤10I of some wave in B region; Steel is with for thickness h > 1.0mm, requires horizontal arbitrary neighborhood three high difference≤12I of some wave in a-quadrant; Horizontal arbitrary neighborhood three high absolute difference≤12I of some wave in B region;
(5) evaluation result when step (2) and (4) meets the demands, then continue to produce, and when the evaluation result backlog demand of step (2) and/or (4), then adjusts according to evaluation result.
2. very thin color coating base-material cold-rolled plate shape control method as claimed in claim 1, it is characterized in that, in step (1), H is base-material thickness, and as H≤1.8mm, convexity requires 40 ± 20um, 1.8mm < H≤2.0mm, convexity requires 45 ± 20um, 2.0mm < H≤2.2mm, and convexity requires 50 ± 20um.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108090673B (en) * | 2017-12-15 | 2022-03-01 | 马鞍山钢铁股份有限公司 | Method for evaluating physical plate shape of cold-rolled strip steel |
| CN108941209B (en) * | 2018-06-20 | 2020-02-04 | 北京首钢股份有限公司 | Method for controlling rib forming defect in middle of cold-rolled strip steel |
| CN110000223B (en) * | 2019-03-26 | 2020-09-29 | 燕山大学 | Measuring error correction method suitable for offline shape of cold-rolled sheet |
| CN114965935A (en) * | 2022-05-17 | 2022-08-30 | 马鞍山钢铁股份有限公司 | Strip steel quality judgment method and system based on customer requirements |
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| JPS61202712A (en) * | 1985-03-06 | 1986-09-08 | Kawasaki Steel Corp | Rolling method by controlling shape of sheet stock |
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| JPS61202712A (en) * | 1985-03-06 | 1986-09-08 | Kawasaki Steel Corp | Rolling method by controlling shape of sheet stock |
| JPS6277110A (en) * | 1985-09-30 | 1987-04-09 | Kawasaki Steel Corp | Dimension and shape straightening apparatus for hot rolling steel plate |
| CN102581025A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Slight center wave control method for straightness of hot rolling strip steel |
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