CN102847731A - Control method for surface roughness of finished cold metal strips - Google Patents
Control method for surface roughness of finished cold metal strips Download PDFInfo
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- CN102847731A CN102847731A CN2011101806276A CN201110180627A CN102847731A CN 102847731 A CN102847731 A CN 102847731A CN 2011101806276 A CN2011101806276 A CN 2011101806276A CN 201110180627 A CN201110180627 A CN 201110180627A CN 102847731 A CN102847731 A CN 102847731A
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Abstract
A control method for surface roughness of finished cold metal strips includes that the finished cold metal strips firstly enter a mixing jet injection section provided with the mixing jet injection capacity, the injection section drives hard particles with a certain concentration through high pressure and accelerates the hard particles to a certain speed state, the hard particles are ejected through a nozzle and bombarded on the upper and lower surfaces of the finished cold metal strips directly, and a series of fine pits are formed on the upper and lower surfaces of the finished cold metal strips; next, the metal strips sequentially enter a high-pressure water washing section, all hard particles on the surfaces are washed clean under the action of the high-pressure water washing, and only water stains are left on the surfaces of the metal strips; then the metal strips enter a wringing roll and large quantities of water on the surfaces of the metal strips can be eliminated through wringing; and finally the metal strips enter a high-temperature air drying section, residual moisture on the surfaces of the metal strips is eliminated immediately to achieve drying of the surfaces of the metal strips, and the metal strips after the processes can be subjected to various post-processing.
Description
Technical field
The present invention relates to the surface of steel plate treatment technology, be particularly related to the control method of finished product cold conditions metal plate and belt surface roughness, be mainly used in the surface roughness of cold rolling finished product cold conditions metal plate and belt is accurately controlled, realize a control of steel surface roughness, coating characteristic, guarantee that finished product cold conditions metal plate and belt reaches the required all kinds of different surface roughness requirement of user, improve control flexibility and the effect of surface roughness.
Background technology
Steel plate is after process is cold rolling, its surface roughness has the extension attribute of cold roll, steel plate material itself and cold rolling rolling mill practice to determine usually, because influence factor is more, simultaneously for guaranteeing the logical plate characteristic of stable high speed, usually be difficult to obtain required final steel surface roughness, thereby cause subsequent technique impact greatlyr, so that cause the finished steel plate of subsequent treatment off quality, affect the sale of product, this impact is mainly reflected in the following aspects:
1, further rolling technique requires roughness: all need to carry out rolling of next step through multi-frame thin for the steel plate of some material, be about to the thin specification of steel plate rolling behind the 0.18mm behind the existing 0.5mm, this moment, milling train had certain roughness requirement to the surface of steel plate, and certain roughness is conducive to stable logical plate.
2, Coating is to the requirement of the roughness of surface of steel plate: for improving steel plate after cold rolling to the adhesion property of the metal coatings such as zinc liquid, tin, need surface of steel plate to have the roughness levels of ideal range, be coated with like this and be plated in the steel plate that shows and have larger active surface, thereby guarantee the tack that it is good, improved the surface quality behind the steel plate coating.
Yet in real Rolling Production, the surface roughness of steel plate is subjected to the impact of roll surface roughness the most direct.Yet the surface roughness of roll presents typical variation characteristic within the whole military service cycle of roll.Take last frame working rolls of five frame tandem rollings as example; this working roll can adopt laser roughening or electric spark texturing usually before reaching the standard grade; its purpose is to strengthen roll to show intensity on the one hand, is that the roughness of control roller surface reaches required rank on the other hand.
So, this roll reach the standard grade rolling after: in the starting stage, the supplied materials roughness of its surface roughness and steel plate influences each other, and has brought up the steel surface roughness value that rolls out this period; At mid-term stage, along with increasing of the rolling mileage number of working roll, the surface roughness of roll is subjected to the impact of rolled piece surface roughness, its roughness levels is close to the roughness levels of rolled piece, thereby cause also respective change of rolling steel surface roughness of going out, namely steel plate roughness and the roughness of starting stage of this moment are inconsistent; In stage last stage, the roughness of roll has broken away from original roughness levels fully, and the belt steel surface roughness that shut out this moment also further variation must occur, and is namely all inconsistent with starting stage, mid-term stage.
Hence one can see that, the band steel is during continuous rolling, even with a collection of identical roll, its surface roughness that shuts out also differs huge, the subsequent technique treatment effect that brings therefrom also differs huge, therefore, the control of belt steel surface roughness has become a protrusion problem in cold rolling field, needs to solve as early as possible.
Summary of the invention
The objective of the invention is to design a kind of control method of finished product cold conditions metal plate and belt surface roughness, directly be injected into the belt steel surface of product by the high pressure mixing jet, bombard at surface of steel plate by the mixing jet that adopts different grain size, different expulsion pressures, directly control is with the surface roughness rank of steel, thereby realize the flexible control to the belt steel surface roughness, stop roughness in the existing rolling mill practice and be subjected to the be on active service impact of the factors such as cycle, material Noumenon property of roll.
For achieving the above object, technical scheme of the present invention is:
Roughness control method of the present invention is based on a kind of high pressure mixing jet, utilizes water under high pressure to drive the together at a high speed bombardment of tiny hard composition granule, causes steel surface roughness directly to change, thereby reaches the purpose of control roughness.
Particularly, the control method of finished product cold conditions metal plate and belt surface roughness of the present invention, finished product cold conditions metal plate and belt at first enters the mixing jet jet segment, this jet segment possesses the mixing jet jet power, drive certain density hard composition granule by water under high pressure, water is controlled at 0～50% with the w/v that hard composition granule mixes, and these hard composition granules are accelerated under the certain speed state sprayed by nozzle, speed is 30m/s～100m/s, directly bombardment forms a series of tiny pits in finished product cold conditions metal plate and belt upper and lower surface on the upper and lower surface of finished product cold conditions metal plate and belt; Then, metal plate and belt enters the high pressure water washing section in turn, and its force value is controlled at 1～20MPa usually, and under the effect of high pressure water washing, all hard composition granules on surface all are rinsed totally, remain in only having of metal plate and belt surface water stain; Then, metal plate and belt enters squeeze roll, by extracting, the large water gaging on metal plate and belt surface is eliminated, and last, metal plate and belt enters the high temperature air drying section, the drying section temperature is 80～120 ℃, remove immediately only residual moisture of metal plate and belt surface of steel plate, realize the drying on metal plate and belt surface, the metal plate and belt after so processing namely can be used for various post processings.
Described mixing jet jet segment is arranged at the milling train outlet section of last passage of the Mill Exit zone of cold-rolling mill or singlestandmill, or is directly used in the outlet section of de-scaling unit.
Described hard composition granule comprises garnet, brown corundum, quartz sand, iron sand, shot or steel wire cut pill.
The granularity of described hard composition granule is between 10 orders～200 orders.
Described high pressure washing section adopts Single Medium water.
The invention has the beneficial effects as follows:
1) can effectively control the surface roughness of finished product, directly satisfy the processing demands of downstream process effects on surface roughness;
2) treatment process of the last breast roller surface roughness of replacement utilizes the mode of this jet bombardment can keep the whole piece belt steel surface to possess stable roughness value respectively, has guaranteed surface quality stability and lumber recovery with the rear PROCESS FOR TREATMENT of steel.
Description of drawings
Fig. 1 is that roughness treatment process of the present invention is arranged 1 schematic diagram.
Fig. 2 is that roughness treatment process of the present invention is arranged 2 schematic diagram.
Fig. 3 is that the present invention is used for the layout drawing that Mill Exit is set up roughness treatment process section.
Fig. 4 is that the present invention is used for singlestandmill outlet and sets up the layout drawing of roughness treatment process section.
Fig. 5 is that the present invention is used for de-scaling section outlet and sets up the layout drawing of roughness treatment process section.
The specific embodiment
Referring to Fig. 1～Fig. 3, the embodiment of the invention is set up roughness treatment process section as embodiment take the outlet of cold conditions five frame connection rolling machine, and its specific embodiment is as follows:
Finished product cold conditions metal plate and belt 2 is after passing through uncoiler 1 uncoiling, enter a series for the treatment of process sections of cold rolling product line, at first it is by after the five frame connection rolling machine rolling mill practice section 3, finished product cold conditions metal plate and belt 2 is rolled into the finished product cold conditions metal plate and belt 2 into certain thickness, certain surface roughness, and there is some difference for the required roughness levels of this moment its surperficial roughness levels and rear process section.So, reach R5.0～R6.0 standard for realizing finished product cold conditions metal plate and belt 2 level of surface roughness, need this moment finished product cold conditions metal plate and belt 2 to carry out roughness and process.
So, finished product cold conditions metal plate and belt 2 enters mixing jet jet segment 9 in turn, this jet segment adopts water under high pressure to drive the garnet of 10% volume by volume concentration, and garnet granularity remains on 60 purpose levels, so the mixture of concentration is directly bombarding on the upper and lower surface of finished product cold conditions metal plate and belt 2 under the pressure of 50MPa, directly cause metal plate and belt 2 surfaces namely to reach predetermined roughness levels, speed is 30m/s～100m/s; Distribution according to process section, finished product cold conditions metal plate and belt 2 enters high pressure water washing section 10 in turn, purge zone 10 adopts the flushing pressure of pressure position 10MPa, directly all garnet particles of finished product cold conditions metal plate and belt 2 upper and lower surfaces are rinsed well, guaranteed that only having of finished product cold conditions metal plate and belt 2 surfaces is water stain; Then, finished product cold conditions metal plate and belt 2 enters squeeze roll 12 in turn, by extracting, the large water gaging on finished product cold conditions metal plate and belt 2 surfaces is eliminated, at this moment, the water yield that remains in finished product cold conditions metal plate and belt 2 surfaces is few, so, finished product cold conditions metal plate and belt 2 enters high temperature air drying section 8 in turn, by 120 ℃ dried compressed air, this compressed-air actuated expulsion pressure is 5bar, and rapid draing has been realized on finished product cold conditions metal plate and belt 2 surfaces after so processing, then enter crimping machine 6 by guide roller 5, realized the curling of finished product cold conditions metal plate and belt 2 under this roughness.
Referring to Fig. 4, Figure 4 shows that the present invention is used for the singlestandmill outlet and sets up the layout drawing of roughness treatment process section.Wherein, cold conditions metal plate and belt 2 is through behind singlestandmill 3 repeatedly back and forth rolling, after in the end a passage is finished final formation rolling, enter mixing jet jet segment 4, this processing section comprises a plurality of processing units, and such as H1, H2 etc., mixing jet jet segment 4 adopts water under high pressure to drive the garnet of 20% volume by volume concentration, and garnet granularity remains on 60 purpose levels, and expulsion pressure is the 20MPa level; High pressure water washing section H3, the flushing pressure of employing 5MPa; Then enter in turn squeeze roll 12 and high temperature air drying section 8, rapid draing has been realized on finished product cold conditions metal plate and belt 2 surfaces after so processing, and then enters crimping machine 6 by guide roller 5, has realized the curling of cold conditions metal plate and belt 2 under this roughness.
Referring to Fig. 5, Figure 5 shows that the present invention is used for the outlet of de-scaling section and sets up the layout drawing of roughness treatment process section.Wherein, cold conditions hot-rolling metal strip 2 is after removing process section 11 by surperficial firecoat, enter in turn mixing jet jet segment 4, this processing section comprises a plurality of processing units, such as H1, H2 etc., mixing jet jet segment 4 adopts water under high pressures to drive the garnet of 20% volume by volume concentration, and garnet granularity remains on 60 purpose levels, and expulsion pressure is the 15MPa level; High pressure water washing section H3, the flushing pressure of employing 5MPa; Then enter in turn squeeze roll 12 and high temperature air drying section 8, rapid draing has been realized on finished product cold conditions metal plate and belt 2 surfaces after so processing, and then enters crimping machine 6 by guide roller 5, has realized the curling of cold conditions metal plate and belt 2 under this roughness.
Finished product cold conditions metal plate and belt 2 after so processing can be used for all kinds of coatings, further processing processing etc.
The present invention takes full advantage of the spray characteristic of mixing jet, realizes the accurate control to the metal plate and belt surface roughness.Therefore, the present invention has broad application prospects in the technical field of metal plate and belt Roughness Surface on Control.
Claims (5)
1. the control method of finished product cold conditions metal plate and belt surface roughness, finished product cold conditions metal plate and belt at first enters the mixing jet jet segment, this jet segment possesses the mixing jet jet power, drive certain density hard composition granule by water under high pressure, water is controlled at 0～50% with the w/v that hard composition granule mixes, and these hard composition granules are accelerated under the certain speed state sprayed by nozzle, speed is 30m/s～100m/s, directly bombardment forms a series of tiny pits in finished product cold conditions metal plate and belt upper and lower surface on the upper and lower surface of finished product cold conditions metal plate and belt; Then, metal plate and belt enters the high pressure water washing section in turn, and its force value is controlled at 1～20MPa usually, and under the effect of high pressure water washing, all hard composition granules on surface all are rinsed totally, remain in only having of metal plate and belt surface water stain; Then, metal plate and belt enters squeeze roll, by extracting, the large water gaging on metal plate and belt surface is eliminated, and last, metal plate and belt enters the high temperature air drying section, the drying section temperature is 80～120 ℃, remove immediately only residual moisture of metal plate and belt surface of steel plate, realize the drying on metal plate and belt surface, the metal plate and belt after so processing namely can be used for various post processings.
2. the control method of finished product cold conditions metal plate and belt surface roughness as claimed in claim 1, it is characterized in that, described mixing jet jet segment is arranged at the milling train outlet section of last passage of the Mill Exit zone of cold-rolling mill or singlestandmill, or is directly used in the outlet section of de-scaling unit.
3. the control method of finished product cold conditions metal plate and belt surface roughness as claimed in claim 1 is characterized in that, described hard composition granule comprises garnet, brown corundum, quartz sand, iron sand, shot or steel wire cut pill.
4. such as the control method of claim 1 or 3 described finished product cold conditions metal plate and belt surface roughnesses, it is characterized in that, the granularity of described hard composition granule is between 10 orders～200 orders.
5. the control method of finished product cold conditions metal plate and belt surface roughness as claimed in claim 1 is characterized in that, described high pressure washing section adopts Single Medium water.
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Cited By (9)
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| CN103962400A (en) * | 2013-01-31 | 2014-08-06 | 宝山钢铁股份有限公司 | Arrangement mode for mixed jet washing nozzles |
| CN103962332A (en) * | 2013-01-31 | 2014-08-06 | 宝山钢铁股份有限公司 | Surface cleaning technology for blocky blank and technological arrangement |
| CN104056865A (en) * | 2013-03-19 | 2014-09-24 | 宝山钢铁股份有限公司 | Steel plate surface treatment method and device |
| CN104084894A (en) * | 2014-07-09 | 2014-10-08 | 江苏大明精密钣金有限公司 | Mixed sand blasting process |
| CN104624669A (en) * | 2015-02-10 | 2015-05-20 | 北京科技大学 | Roughness predication and control method for belt steel produced by electric spark textured working roller |
| CN103962332B (en) * | 2013-01-31 | 2016-11-30 | 宝山钢铁股份有限公司 | The surface clean technique of a kind of block blank and technology arrangement |
| CN108356083A (en) * | 2018-04-23 | 2018-08-03 | 黄石山力科技股份有限公司 | A kind of coil of strip pickling skin pass mill group and coil of strip production method |
| CN112847150A (en) * | 2021-01-05 | 2021-05-28 | 无锡华精新材股份有限公司 | Surface strengthening treatment process for substrate of galvanized aluminum-magnesium alloy steel plate |
| CN113927487A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Online control method for surface roughness of cold-rolled strip steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103962400A (en) * | 2013-01-31 | 2014-08-06 | 宝山钢铁股份有限公司 | Arrangement mode for mixed jet washing nozzles |
| CN103962332A (en) * | 2013-01-31 | 2014-08-06 | 宝山钢铁股份有限公司 | Surface cleaning technology for blocky blank and technological arrangement |
| CN103962332B (en) * | 2013-01-31 | 2016-11-30 | 宝山钢铁股份有限公司 | The surface clean technique of a kind of block blank and technology arrangement |
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| CN104084894A (en) * | 2014-07-09 | 2014-10-08 | 江苏大明精密钣金有限公司 | Mixed sand blasting process |
| CN104624669A (en) * | 2015-02-10 | 2015-05-20 | 北京科技大学 | Roughness predication and control method for belt steel produced by electric spark textured working roller |
| CN108356083A (en) * | 2018-04-23 | 2018-08-03 | 黄石山力科技股份有限公司 | A kind of coil of strip pickling skin pass mill group and coil of strip production method |
| CN113927487A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Online control method for surface roughness of cold-rolled strip steel |
| CN112847150A (en) * | 2021-01-05 | 2021-05-28 | 无锡华精新材股份有限公司 | Surface strengthening treatment process for substrate of galvanized aluminum-magnesium alloy steel plate |
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Application publication date: 20130102 |