CN103920739B - A kind of low acid consumes great surface quality with heat for cold product processes - Google Patents
A kind of low acid consumes great surface quality with heat for cold product processes Download PDFInfo
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Abstract
The present invention relates to a kind of low acid consumption great surface quality with heat for cold product processes, specifically include following steps: uncoiler uncoiling；The oxide of belt steel surface is crushed, peels off by planisher；Multi-roll straightening machine oxide broken, the stripping further to belt steel surface；Scrubbing roller in brushing device removes the oxide that belt steel surface comes off and loosens；By through smooth, align and scrub process after strip steel carry out pickling, rinsing；Strip steel through overpickling is entered into mechanical lapping equipment and carries out surface grinding；Belt steel surface roughness carries out Homogenization Treatments；Strip coiling after processing is become finished product；By the technical program, 1 facilitates acid solution rapid osmotic, promotes pickling efficiency；2 remove partial oxidation skin, reduce pickling response magnitude, reduce acid consumption；After 3 processing, strip steel yield strength value added is low；4 have stopped at the common hot rolling product surface luders band through being commonly formed；5 are processed by the mechanical surface after pickling, improve the surface quality of strip steel.
Description
Technical field
The invention belongs to common hot rolled flat material field of deep, particularly relate to a kind of low acid consumption great surface quality with heat for cold product processes.
Background technology
In the prior art, as shown in Figure 1, traditional pickling unit is by uncoiler 1, entry loop 2, withdrawal straightening machine 3, pickling 4, outlet looping 5, polishing machine 22 and coiling machine 6 are constituted, hot-strip 7 is through process of surface treatment clear board face oxide 8, recycling polishing machine can Substitute For Partial cold-rolled products after processing, it is applied to building, automobile, the fields such as household electrical appliances, this product has very big cost-competitive, conventional pickling skin pass mill group configures a withdrawal straightening machine 3 in unit inlet and carries out machinery scale breading, strip steel after scale breading enters acid tank pickling, surface finishing process is carried out after pickling, it is undesirable that this production technology also exists scale breading effect；Pickling efficiency consumption low, sour is big；Properties of product and surface quality cannot meet the problems such as requirement.
As shown in Figure 2, the main cause causing pickling 4 efficiency consumption low, sour high is the Descaling of withdrawal straightening machine 3 and keeps properties of product to there is contradiction between requiring, in withdrawal straightening machine 3 work process, the oxide 8 on strip steel 7 surface tension with formed under bending stress effect and the consistent oxide crackle 9 in strip width direction, after withdrawal straightening machine 3, strip steel 7 elastic recovery, makes the oxide crackle 9 that strip steel 7 surface has produced close.
For keeping strip steel 7 performance, the elongation percentage by withdrawal straightening machine 3 is needed to be arranged on below strip steel yield limit, under such conditions, after strip steel 7 leaves withdrawal straightening machine 3, strip steel 7 body elastic recovery, cause strip steel 7 oxide on surface crackle 9 to close, therefore in pickling 4 process, acid solution is difficult to penetrate into FeO33 from the oxide crackle 9 being closed, and reacts with it, and pickling efficiency is very low.
In order to improve pickling efficiency, the elongation percentage by withdrawal straightening machine 3 is needed to be arranged on the yield limit of strip steel, strip steel is made to produce plastic deformation, under such conditions, strip steel 7 can partly keep the gap of oxide on surface 8 after leaving withdrawal straightening machine 3, promote pickling efficiency, but, the performance loss that this kind of mode can cause product is serious.
As it is shown on figure 3, for the conventional hot rolled plate of the interstitial atom such as carbon, nitrogen content >=30ppm, after withdrawal straightening machine 3 carries out straightening, uneven surface surrender can be produced on strip steel 7 surface, is commonly called as luders band 10；For the high-strength steel in carbon steel, IF steel, although luders band 10 will not be produced at belt steel surface, but, due to the unidirectional increase along with the increase of elongation percentage of its yield strength, therefore, strengthen elongation percentage and can worsen properties of product undoubtedly.
As shown in Figure 4 and Figure 5, after carrying out pickling 4, the main cause that product surface quality is not high is the final surface of product is direct chemical reaction surface, and in the ideal situation, the oxide 8 on strip steel 7 surface, from top layer to the oxide 8 respectively Fe of nexine2O331、Fe3O432, FeO33, above-mentioned three kinds of oxides 8 are different with the complexity of acid reaction, are positioned at undermost FeO33 and the most easily react with pickling 4, in this state, acid solution is essentially identical with the response time of oxide 8 and strip steel 7 body, and after pickling 4, strip steel 7 surface quality is uniform；But, in actual production, part Fe3O432 can be deposited on belt steel surface, due to Fe3O432 is different with the response time of acid solution from FeO33, thus causing the uneven reaction between acid solution and strip steel 7, cause strip steel 7 surface after pickling 4, process through machine set outlet planisher, cannot thoroughly color difference eliminating and other surface defects, can not meeting the instructions for use of overwhelming majority product, therefore, traditional constraining for cold production technology with heat is applied for the market of cold product with heat.
Summary of the invention
In view of this, present invention is primarily targeted at a kind of low acid consumption great surface quality of offer with heat for cold product processes, by the technical program, adopt include combination type de-scaling, strip steel is carried out surface treatment by efficient pickling, three process sections of two-step method surface treatment.Combination type descaling process, adopt smooth aligning to scrub compound mode and carry out scale breading, de-scaling, make the belt steel surface oxide quantity of formation after processing many, and be permanent oxide crackle, promote pickling efficiency, reduce pickling consumption, luders band defect can be avoided when processing common hot-rolled product, when processing high-strength steel, IF product made from steel, make performance losses minimum；Efficient acid cleaning process adopts the quick pickling of short acid tank, and acid consumption is greatly reduced；Two-step method surface treatment includes mechanical lapping and even surface roughnessization processes two steps, the surface quality of product after lifting pickling.
In order to achieve the above object, the technical scheme is that and be achieved in that: a kind of low acid consumption great surface quality for cold product processes, specifically includes following steps with heat:
A. uncoiler uncoiling；
B. the oxide of belt steel surface is crushed, peels off by planisher；
C. multi-roll straightening machine oxide broken, the stripping further to belt steel surface；
D. the scrubbing roller in brushing device removes the oxide that belt steel surface comes off and loosens；
E. by through smooth, align and scrub process after strip steel carry out pickling, rinsing；
F. the strip steel through overpickling, rinsing is entered into mechanical lapping equipment and carries out mechanical surface abrasion, repair surface defect；
G. the strip steel after above-mentioned process is entered polishing machine and carry out even surface roughness process；
H. the strip steel after process is batched through coiling machine and become finished product.
The production method of the present invention is flattening process, multiple roll straightening process, scrub technique, acid cleaning process, the group technology of mechanical surface grinding technics and control roughness finishing process, planisher it is configured with after processing uncoiler, multi-roll straightening machine, brushing device three set possesses scale breading, the process equipment of de-scaling function, treated strip steel enters acid tank and carries out pickling processing, then the strip steel after pickling is entered into mechanical lapping equipment and carry out mechanical surface reparation, finally enter back into polishing machine and above-mentioned belt steel surface roughness is carried out the skin processing of Homogenization Treatments.
In technical scheme, comprise three mechanical type scale breadings, de-scaling functions, first the oxide of belt steel surface is crushed by planisher, broken oxide is carried out repeatedly forward and reverse bending by the multi-roll straightening machine followed by planisher outlet, broken oxide further, finally utilize brushing device that belt steel surface is carried out oxide removing, three complete equipment coordinated, remove the oxide of Surfaces of Hot Rolled Strip as much as possible.
In technical scheme, including smooth scale breading, multiple roll aligning scale breading and de-scaling, scrub de-scaling, Pickling Descaling and mechanical surface grinding technics, mechanical descaling efficiency is high, pickling time consumption short, sour is low, surface quality is better than common acid-washed product and surface roughness can classification regulation and control.
The present invention has shortening acid reaction time function, described strip steel is after a smooth scale breading, multiple roll aligning secondary scale breading, brushing device de-scaling, permanent, large scale oxide crackle is defined at belt steel surface, now enter back into pickling and carry out chemistry de-scaling, owing to belt steel surface possesses large scale oxide crackle, acid solution can rapid osmotic react to FeO, and by conventional 16-22s, the pickling time of straight carbon steel is shortened to 10-12s；Dual phase steel pickling time in high-strength steel is shortened to 20-25s by 35-45s.
The present invention has the function reducing acid consumption, and described strip steel, after a smooth scale breading, multiple roll aligning secondary scale breading, brushing device de-scaling, removes belt steel surface partial oxide, decreases chemical reaction amount, reduce acid consumption.
In technical scheme, produce strip surface quality and be better than the process of conventional acid-washed product, belt steel product through overpickling is entered mechanical lapping equipment and carries out mechanical surface milled processed, after one-level or multistage mechanical type surface grinding process, it is possible to obtain the hot rolling acid-cleaning product of different surface roughness.
In technical scheme, the breaking elongation comprising the scale breading course of processing controls function, while belt steel surface oxide removed by planisher, controlled the breaking elongation of planisher and multi-roll straightening machine by planisher roll-force dynamic adjustment function, and then ensure the performance of machined material.
The present invention has under the premise not affecting strip property, crush, remove the function of belt steel surface oxide, the combination of planisher, multi-roll straightening machine and brushing device, can when strip steel elongation percentage be 0.8%-1.5%, oxide crackle permanent, large-sized is formed at belt steel surface, it is rapidly completed chemical surface treatment, has stopped common hot-rolled product and produced luders band defect；Avoid the high-strength steel in carbon steel, IF Steel Properties worsens.
In technical scheme, comprise secondary plate shape and improve function, strip steel tentatively improves entrance multi-roll straightening machine after plate shape through planisher, and according to the smoothing roll registration up and down of belt steel thickness and material adjustment multi-roll straightening machine, improves plate shape and thickness and precision further.
Provide the benefit that after adopting technique scheme: a kind of low acid consumes great surface quality with heat for cold product processes, compared by the technical program prior art, after 1 processing, the crackle on belt steel surface iron scale is many and gap is big, facilitate acid solution rapid osmotic, therefore, it can be obviously improved pickling efficiency；2 while scale breading, removes partial oxidation skin, reduces pickling response magnitude, reduces acid consumption；After 3 processing, strip steel yield strength value added is low, and strip property is substantially unaffected；4 eliminate the yield point elongation of strip steel by the processing of planisher, have stopped at the common hot rolling product surface luders band through being commonly formed；5 are processed by the mechanical surface after pickling, substantially increase the surface quality of strip steel.
Accompanying drawing explanation
Fig. 1 is the straightening scale breading schematic diagram that in prior art, conventional acid washing machine adopts.
Fig. 2 is the view of hot-strip straightening front and rear surfaces oxide iron sheet in prior art.
Fig. 3 is the luders band sample picture that in prior art, common hot rolled plate surface often produces after straightening.
Fig. 4 is the desirable oxide structure figure of belt steel surface.
Fig. 5 is the oxide structure figure that belt steel surface is actual.
Fig. 6 is the strip surface quality figure after prior art pickling.
Fig. 7 is the process equipment layout drawing of the present invention.
Fig. 8 is flattening process in the present invention, aligning scale breading technique and the equipment structure chart scrubbing technique.
Fig. 9 is that in the present invention, planisher elongation percentage is belt steel surface oxide crackle state picture under 0.8%-1.5% state.
Mechanical lapping equipment structural representation in Figure 10 present invention.
In figure, 1 uncoiler, 2 entry loops, 3 withdrawal straightening machines, 4 pickling, 5 outlet loopings, 6 coiling machines, 7 strip steel, 8 oxides, 9 oxide crackles, 10 luders bands, 11 planishers, 12 multi-roll straightening machines, 13 working rolls, 14 smoothing rolls, 15 brushing devices, 16 scrubbing rollers, 17 mechanical lapping equipments, 18 backing rolls, 19 mixing rolls, 22 polishing machines, 30 rinsings, 31Fe2O3、32Fe3O4、33FeO。
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment in the present invention is described in further detail.
As shown in Figure 7 and Figure 8, the low acid consumption great surface quality of one that the present invention relates to is with heat for cold product processes, and described oxide includes Fe2O331、Fe3O432、FeO33, specifically includes following steps:
A. uncoiler 1 uncoiling；
B. the oxide 8 on strip steel 7 surface is crushed, peels off by planisher 11；
C. the multi-roll straightening machine 12 oxide 8 broken, the stripping further to strip steel 7 surface；
D. the scrubbing roller 16 in brushing device 15 removes the oxide 8 that strip steel 7 surface comes off and loosens；
E. by through smooth, align and scrub process after strip steel 7 carry out pickling 4, rinsing 30；
F. the strip steel 7 through overpickling 4, rinsing 30 is entered into mechanical lapping equipment 17 and carry out mechanical surface grinding, repair surface defect；
G. the strip steel 7 after above-mentioned process is entered polishing machine 22 and carry out even surface roughness process；
H. the strip steel 7 after process is batched through coiling machine 6 and become finished product.
The production method of the present invention is flattening process, multiple roll straightening process, scrub technique, acid cleaning process and mechanical surface renovation technique and the group technology controlling roughness finishing process, planisher 11 it is configured with after processing uncoiler 1, multi-roll straightening machine 12, brushing device 15 3 set possesses scale breading, the process equipment of de-scaling function, treated strip steel 7 enters acid tank to carry out pickling 4 and processes, then the strip steel 7 after pickling 4 is entered into mechanical lapping equipment 17 and carry out mechanical surface reparation, finally enter back into polishing machine 22 and above-mentioned strip steel 7 surface roughness is carried out the skin processing of Homogenization Treatments.
In technical scheme, comprise three mechanical type scale breadings, de-scaling functions, first pass through the planisher 11 oxide 8 to strip steel 7 surface to crush, broken oxide 8 is carried out repeatedly forward and reverse bending by the multi-roll straightening machine 12 followed by planisher 11 outlet, broken oxide 8 further, finally utilize brushing device 15 that strip steel 7 surface is carried out oxide 8 to remove, three complete equipment coordinated, remove the oxide 8 on hot-strip 7 surface as much as possible.
In technical scheme, including smooth scale breading, multiple roll aligning scale breading and de-scaling, scrub de-scaling, Pickling Descaling and mechanical surface grinding technics, mechanical descaling efficiency is high, pickling time consumption short, sour is low, surface quality is better than common acid-washed product and surface roughness can classification regulation and control.
The present invention has shortening acid reaction time function, described strip steel 7 is after 11 scale breadings of planisher, 12 2 scale breadings of multi-roll straightening machine, brushing device 15 de-scaling, permanent, large scale oxide crackle 9 is defined on strip steel 7 surface, now enter back into pickling 4 and carry out chemistry de-scaling, owing to strip steel 7 surface possesses large-sized oxide crackle 9, acid solution can rapid osmotic react to FeO33, and by conventional 16-22s, the pickling time of straight carbon steel is shortened to 10-12s；Dual phase steel pickling 4 time in high-strength steel is shortened to 20-25s by 35-45s.
The present invention has the function reducing acid consumption, and described strip steel 7, after 11 scale breadings of planisher, 12 2 scale breadings of multi-roll straightening machine, brushing device 15 de-scaling, removes strip steel 7 surface portion oxide 8, decreases chemical reaction amount, reduces acid consumption.
In technical scheme, produce strip steel 7 surface quality and be better than the process of conventional acid-washed product, strip steel 7 product through overpickling 4 is entered mechanical lapping equipment 17 and carries out mechanical surface milled processed, after one-level or multi-stage mechanical lapping device 17 process, it is possible to obtain hot rolling acid-cleaning 4 product of different steel 7 surface roughness.
In technical scheme, the breaking elongation comprising the scale breading course of processing controls function, while strip steel 7 oxide on surface 8 removed by planisher 11, controlled the breaking elongation of planisher 11 and multi-roll straightening machine 12 by planisher 11 roll-force dynamic adjustment function, and then ensure the performance of machined material.
As shown in Figure 9, the present invention has under the premise not affecting strip steel 7 performance, crush, remove the function of strip steel 7 oxide on surface 8, the combination of planisher 11, multi-roll straightening machine 12 and brushing device 15, can when strip steel 7 elongation percentage be 0.8%-1.5%, form oxide crackle 9 permanent, large-sized on strip steel 7 surface, be rapidly completed chemical surface treatment, stopped common hot-strip 7 surface and produced luders band 10 defect；Avoid the penalty of the high-strength steel in carbon steel, IF steel.
In technical scheme, comprise secondary plate shape and improve function, strip steel 7 tentatively improves entrance multi-roll straightening machine 12 after plate shape through planisher 11, and according to smoothing roll up and down 14 registration of strip steel 7 thickness and material adjustment multi-roll straightening machine 12, improves plate shape and thickness and precision further.
At work, the strip steel 7 on uncoiler 1 is connected with the strip steel 7 on entry loop 2 present invention through welding, and strip steel 7 is first in planisher 11, due to the Fe on strip steel 7 surface2O331、Fe3O432 tissue poor ductility, man-hour is added carrying out planisher 11, strip steel 7 body tissue extending very capable attempts to extend forward under roll-force effect, this trend is subject to the restriction of the oxide on surface 8 of poor ductility, therefore between oxide on surface 8 and strip steel 7 body tissue, produce horizontal tangential power, oxide on surface 8 is helped to peel off from belt steel surface, simultaneously, working roll 13 in planisher 11 extrudes strip steel 7 under the effect of roll-force, by oxide 8 pressure break on strip steel 7 surface, form many fine and closely woven and that direction is random crackle 9.
When surface has after the strip steel 7 of above-mentioned fine and closely woven oxide crackle 9 leaves planisher 11, enter into multi-roll straightening machine 12 and carry out secondary scale breading, smoothing roll 14 in multi-roll straightening machine 12 makes strip steel 7 produce repeatedly forward and reverse bending, each Forging Process of strip steel 7 makes the oxide 8 that strip steel 7 surface has been flattened machine 11 pressure break crush further, the oxide crackle 9 on strip steel 7 oxide on surface 8 is made to increase further, make the oxide 8 that part has separated with strip steel 7 body tissue in planisher 11 directly come off simultaneously, oxide 8 structure on strip steel 7 surface is formed permanent oxide crackle 9, this oxide crackle 9 remains in strip steel 7 surface after strip steel 7 elastic recovery, after strip steel 7 enters pickling 4, acid solution can rapid osmotic react to FeO33.
After the straight machine 12 of planisher 11 and multiple roll sedan-chair, strip steel 7 enters in the scrubbing roller 16 of brushing device 15, under the rotation of scrubbing roller 16, tinsel bristle on scrubbing roller 16 constantly scrubs strip steel 7 surface, and it extend in the crack of oxide 8, to separate with strip steel 7 body but still unpeeled oxide 8 is removed further, make strip steel 7 body separate but still unpeeled oxide 8 no longer enter in acid tank, decrease acid reaction amount, thus the acid solution effectively saved in pickling 4, improve the utilization rate of acid solution, reduce acid consumption and production cost.
The present invention manufactures oxide crackle 9 by mechanical combination mode on the oxide 8 on strip steel 7 surface, and the number of formed oxide crackle 9 and the size of oxide crackle 9 and the plastic deformation amount of strip steel 7 are unrelated, and the increase of the yield strength of strip steel 7 is relevant with the elongation percentage of strip steel 7, when in processing, necessary deflection itself is more little, after strip steel 7 is processed, the performance compromise of product is more few, therefore, technical scheme is compared with straightening technique of the prior art, can under the premise not damaging strip steel 7 performance, the oxide 8 on strip steel 7 surface manufactures oxide crackle 9, to improve pickling efficiency.
Technical scheme is applied at common hot rolling product scope, due to common hot-rolled product tissue interstitial atoms carbon, nitrogen content more than 30ppm, therefore, processing and follow-up use procedure in very easily strip steel 7 surface formed luders band 10 defect；And the planisher 11 in the present invention can eliminate the yield point elongation of strip steel 7, thus effectively having stopped prior art is difficult to the generation of luders band 10 defect of the common hot-rolled product avoided.
Technical scheme is high-strength steel at carbon steel, IF product made from steel field is applied, due to high-strength steel, IF steel is in whole processing interval, the yield strength of product is the unidirectional increase with the increase of course of processing deflection all, in order to not damage the performance of material own, elongation percentage must be strictly limited during production, cause pickling 4 extremely inefficient, for the dual phase steel in high-strength steel, the pickling time of general pickling 4 needs between 35s-45s, therefore, how under deflection premise little as far as possible, the work efficiency promoting the pickling 4 of the said goods is a big technical barrier of this series products, the present invention can improve pickling efficiency when not occurring or only produce only small plastic deformation, the pickling time of pickling 4 is shortened 10-20s, substantially increase work efficiency, and solve high-strength steel in carbon steel, the a great problem that IF steel produces.
Owing to before pickling 4, the oxide 8 on strip steel 7 surface also exists Fe3O4The deposition of 32, therefore, strip steel 7 surface after overpickling 4 still suffers from color and luster inequality as shown in Figure 6 and tiny flaw, these surface quality defects are to restrict the key technology difficult problem with hot Dai Leng, the present invention adopts two-step process for treating surface, by mechanical lapping equipment 17, carry out powerful surface grinding on strip steel 7 surface, and Surface uniformization processes the common surface quality promoting pickling 4 product.
As shown in Figure 10, in the present invention, mechanical lapping equipment 17 is powerful grinding, strip steel 7 out enters afterwards from acid tank after one-level rinses 4 grooves removing part surface acid solutions and enters mechanical lapping equipment 17, mechanical lapping equipment 17 adopts the mixing roll 19 with AlO abrasive material that strip steel 7 carries out surface treatment, and the granularity of the subsidiary abrasive material of mixing roll 19 determines the roughness on strip steel 7 surface.
In the present invention, mechanical lapping equipment 17 is when clearing up strip steel 7 upper surface, first mixing roll 19 is arranged in top, lower section is backing roll 18, second is arranged above backing roll 18, lower section is mixing roll 19, two backing rolls 18 and two mixing rolls 19 are one group, can according to the requirement of finished strip 7 surface quality, configure mixing roll 19 and the backing roll 18 of more than one group, described mixing roll 19 with the speed of 1000m/min-3000m/min at strip steel 7 surface high speed rotating, rub and under the combined effect of abrasive lapping at mixing roll 19, remove tiny flaw and the aberration on strip steel 7 surface.
In embodiments of the invention, the structure of described planisher 11, multi-roll straightening machine 12 and brushing device 15 is prior art, is no longer repeated in repeating in this its structure.
The above, be only the present invention preferably possible embodiments, be not limited to protection scope of the present invention.
Claims (10)
1. one kind low acid consumes great surface quality with heat for cold product processes, it is characterised in that specifically include following steps:
A. uncoiler uncoiling；
B. the oxide of belt steel surface is crushed, peels off by planisher；
C. multi-roll straightening machine oxide broken, the stripping further to belt steel surface；
D. the scrubbing roller in brushing device removes the oxide that belt steel surface comes off and loosens；
E. by through smooth, align and scrub process after strip steel carry out pickling, rinsing；
F. the strip steel through overpickling, rinsing is entered into mechanical lapping equipment and carries out mechanical surface grinding, repair surface defect；
G. the strip steel after above-mentioned process is entered polishing machine and carry out even surface roughness process；
H. the strip steel after process is batched through coiling machine and become finished product.
2. the low acid of one according to claim 1 consumes great surface quality with heat for cold product processes, it is characterized in that, this production method is flattening process, multiple roll straightening process, scrub technique, acid cleaning process, the group technology of mechanical surface grinding technics and control roughness finishing process, planisher it is configured with after processing uncoiler, multi-roll straightening machine, brushing device three set possesses scale breading, the process equipment of de-scaling function, treated strip steel enters acid tank and carries out pickling processing, then the strip steel after pickling is entered into mechanical lapping equipment and carry out mechanical surface reparation, finally enter back into polishing machine and above-mentioned belt steel surface roughness is carried out the skin processing of Homogenization Treatments.
3. the low acid of one according to claim 2 consumes great surface quality with heat for cold product processes, it is characterized in that, comprise three mechanical type scale breadings, de-scaling functions, first the oxide of belt steel surface is crushed by planisher, broken oxide is carried out repeatedly forward and reverse bending by the multi-roll straightening machine followed by planisher outlet, broken oxide further, finally utilize brushing device that belt steel surface is carried out oxide removing, three complete equipment coordinated, remove the oxide of Surfaces of Hot Rolled Strip as much as possible.
4. the low acid of one according to claim 2 consumes great surface quality with heat for cold product processes, it is characterized in that, including smooth scale breading, multiple roll aligning scale breading and de-scaling, scrub de-scaling, Pickling Descaling and mechanical surface grinding technics, mechanical descaling efficiency is high, pickling time consumption short, sour is low, surface quality is better than common acid-washed product and surface roughness can classification regulation and control.
5. the low acid of one according to claim 3 consumes great surface quality with heat for cold product processes, it is characterized in that, there is shortening acid reaction time function, described strip steel is after a smooth scale breading, multiple roll aligning secondary scale breading, brushing device de-scaling, permanent, large scale oxide crackle is defined at belt steel surface, now enter back into pickling and carry out chemistry de-scaling, owing to belt steel surface possesses large scale oxide crackle, acid solution can rapid osmotic react to FeO, and by conventional 16-22s, the pickling time of straight carbon steel is shortened to 10-12s；Dual phase steel pickling time in high-strength steel is shortened to 20-25s by 35-45s.
6. the low acid of one according to claim 3 consumes great surface quality with heat for cold product processes, it is characterized in that, there is the function reducing acid consumption, described strip steel is after a smooth scale breading, multiple roll aligning secondary scale breading, brushing device de-scaling, remove belt steel surface partial oxide, decrease chemical reaction amount, reduce acid consumption.
7. the low acid of one according to claim 4 consumes great surface quality with heat for cold product processes, it is characterized in that, produce strip surface quality and be better than the process of conventional acid-washed product, belt steel product through overpickling is entered mechanical lapping equipment and carries out mechanical surface milled processed, after one-level or multistage mechanical type surface grinding process, it is possible to obtain the hot rolling acid-cleaning product of different surface roughness.
8. the low acid of one according to claim 3 consumes great surface quality with heat for cold product processes, it is characterized in that, the breaking elongation comprising the scale breading course of processing controls function, while belt steel surface oxide removed by planisher, controlled the breaking elongation of planisher and multi-roll straightening machine by planisher roll-force dynamic adjustment function, and then ensure the performance of machined material.
9. the low acid of one according to claim 3 consumes great surface quality with heat for cold product processes, it is characterized in that, have under the premise not affecting strip property, crush, remove the function of belt steel surface oxide, the combination of planisher, multi-roll straightening machine and brushing device, it is possible to when strip steel elongation percentage is 0.8%-1.5%, forms oxide crackle permanent, large-sized at belt steel surface, it is rapidly completed chemical surface treatment, has stopped common hot-rolled product and produced luders band defect；Avoid the high-strength steel in carbon steel, IF Steel Properties worsens.
10. the low acid of one according to claim 3 consumes great surface quality with heat for cold product processes, it is characterized in that, comprise secondary plate shape and improve function, strip steel tentatively improves entrance multi-roll straightening machine after plate shape through planisher, and according to the smoothing roll registration up and down of belt steel thickness and material adjustment multi-roll straightening machine, improve plate shape and thickness and precision further.
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| CN107321790B (en) * | 2017-07-31 | 2019-09-13 | 日照宝华新材料有限公司 | The acid washing method of low-carbon hot-rolling strip |
| CN108031717A (en) * | 2017-12-28 | 2018-05-15 | 滁州宝岛特种冷轧带钢有限公司 | A kind of pickling phosphorus removing method of Cold-strip Steel Surface |
| CN108080416A (en) * | 2017-12-28 | 2018-05-29 | 滁州宝岛特种冷轧带钢有限公司 | A kind of compact medium-width strip steel production process |
| CN114277380B (en) * | 2021-12-31 | 2023-12-05 | 中冶赛迪工程技术股份有限公司 | Rapid switching system and method for production of pickling flat rolls and black flat rolls |
| CN115433931A (en) * | 2022-09-15 | 2022-12-06 | 包头钢铁（集团）有限责任公司 | Method for improving quality of phosphating film and preparation method of phosphating film |
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| KR101053414B1 (en) * | 2008-07-04 | 2011-08-01 | 주식회사 포스코 | Descaling method and removal equipment of hot rolled steel strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102719831A (en) * | 2012-05-29 | 2012-10-10 | 中冶南方工程技术有限公司 | Method for removing scales on surface of hot-rolled stainless steel strip |
| CN203304315U (en) * | 2013-06-20 | 2013-11-27 | 武汉钢铁(集团)公司 | Removal device for scale on surface of hot rolled plate |
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