CN103920736A - Method for removing oxides from surface of strip carbon steel with low acid consumption - Google Patents
Method for removing oxides from surface of strip carbon steel with low acid consumption Download PDFInfo
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- CN103920736A CN103920736A CN201410117463.6A CN201410117463A CN103920736A CN 103920736 A CN103920736 A CN 103920736A CN 201410117463 A CN201410117463 A CN 201410117463A CN 103920736 A CN103920736 A CN 103920736A
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Abstract
The invention relates to a method for removing oxides from the surface of strip carbon steel with low acid consumption. Oxides on the surface of strip carbon steel comprise Fe2O3, Fe3O4 and FeO, and the method comprises the following steps: uncoiling by an uncoiling machine; crushing and peeling off oxides on the surface of a strip steel by a flattening machine; further crushing and peeling off oxides on the surface of a strip steel by a multiroll flattener; removing falling-off and loose oxides from the surface of the strip steel by a scrubbing roller in a scrubbing device; carrying out acid pickling and rinsing to the strip steel which is subjected to flattening, straightening and scrubbing treatment; and coiling the treated strip steel by a coiling machine to obtain a finished product. With the adoption of the technical scheme, the method has the beneficial effects that more cracks of oxides on the surface of the treated strip steel are formed, the gaps are large, acid liquid can rapidly permeate conveniently during acid pickling, and the acid pickling efficiency is improved; the scrubbing device can further remove unpeeled-off oxides which are separated from a strip steel machine body, so as to prevent the unpeeled-off oxides which are separated from the strip steel machine body from entering acid pickling procedure, acid reaction dose is increased, and acid consumption and the production cost are reduced.
Description
Technical field
The present invention relates to the flat material deep process technology of ordinary hot draw down field, particularly relate to a kind of belt steel surface oxide sweep-out method of low acid consumption carbon steel.
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, rinsing 30, outlet looping 5 and coiling machine 6 form, adopt withdrawal straightening machine 3 to carry out the broken phosphorus of machinery, on band steel 7 oxide on surface 8, form oxide crackle 9, but it is undesirable that this broken phosphorus method exists brokenly phosphorus effect, to problems such as properties of product infringement are large, and withdrawal straightening machine 3 can only form oxide crackle 9 on band steel 7 oxide on surface 8, cannot remove the partial oxide 8 with steel 7 surfaces, all oxide 8 all needs to remove by pickling 4 reactions, acid reaction amount is large, acid consumption is high.
As shown in Figure 2, in straightening process, with the oxide 8 on steel 7 surfaces, under the effect of tension and bending stress, form with the consistent oxide crackle 9 of steel 7 widths, in band steel 7 elastic recoverys after withdrawal straightening machine 3, make oxide crackle 9 closures that produced with steel 7 surfaces, for retainer belt steel 7 performances, the percentage elongation of withdrawal straightening machine 3 need to be arranged on below band steel 7 yield limits, under this operating mode, band steel 7 leaves after withdrawal straightening machine 3, band steel 7 body elastic recoverys, cause band steel 7 oxide on surface crackle 9 closures.
Therefore in the process of pickling 4, acid solution in descaling bath is difficult to be penetrated into FeO33 from closed oxide crackle 9, and react with it, thereby cause the efficiency of pickling 4 very low, in order to improve pickling efficiency, the percentage elongation of withdrawal straightening machine 3 need to be arranged on the yield limit with steel 7, make to be with steel 7 to produce moulding distortion, under this operating mode, with steel 7, leave the gap that can partly keep oxide on surface 8 after withdrawal straightening machine 3, promote pickling efficiency, still, serious with the performance loss of steel 7 products.
As shown in Figure 3, for the conventional hot rolled plate of the interstitial atom content >=30ppm such as carbon, nitrogen, enter after withdrawal straightening machine 3 and can produce uneven surfaces surrender on band steel 7 surfaces, be commonly called as luders band 10; The band steel 7 of making for high-strength steel, IF steel, although can not produce luders band 10 on band steel 7 surfaces,, due to the unidirectional increase along with the increase of percentage elongation of its yield strength, therefore, strengthen percentage elongation and can worsen properties of product undoubtedly.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of belt steel surface oxide sweep-out method of low acid consumption carbon steel, pass through the technical program, adopt smooth aligning combination to break phosphorus and dephosphorization, make the belt steel surface oxide quantity of formation after processing many, and be permanent crackle, can effectively avoid common hot rolled plate to occur luders band defect simultaneously, the strip property of high-strength steel, IF steel is damaged as minimum, and under the effect of scrubbing technique, greatly reduce acid consumption.
In order to achieve the above object, technical scheme of the present invention is achieved in that a kind of belt steel surface oxide sweep-out method of low acid consumption carbon steel, and the oxide of described belt steel surface comprises Fe
2o
3, Fe
3o
4,feO, specifically comprises the steps:
A. uncoiler uncoiling;
B. planisher carries out fragmentation, peels off the oxide of belt steel surface;
C. multi-roll straightening machine to the oxide of belt steel surface further broken, peel off;
D. the removing of the scrubbing roller in brushing device belt steel surface comes off and loosening oxide;
E. will carry out pickling, rinsing through band steel smooth, that align and scrub after processing;
F. coiling machine becomes finished product by the strip coiling after processing.
Process of the present invention is flattening process, multiple roll straightening process, scrub the group technology of technique and acid cleaning process, after processing uncoiler, dispose the process equipment that planisher, multi-roll straightening machine, brushing device three covers possess broken phosphorus, phosphorus removal functional, treated band steel enters acid tank again and carries out pickling processing.
In technical scheme of the present invention, comprise three mechanical types and break phosphorus, phosphorus removal functional, first planisher carries out fragmentation to the oxide of belt steel surface, then utilize the multi-roll straightening machine of planisher outlet to carry out repeatedly forward and reverse bending to broken oxide, further broken oxide, finally utilize brushing device to carry out oxide removing to belt steel surface, three complete equipment coordinated, remove the oxide of Surfaces of Hot Rolled Strip as much as possible.
The present invention has the acid reaction of shortening time function, through planisher, once broken phosphorus, multi-roll straightening machine secondary break after phosphorus, brushing device dephosphorization described band steel, at belt steel surface, formed permanent, large scale oxide crackle, now entered again acid tank and carry out chemical dephosphorization.Because belt steel surface possesses large-sized oxide crackle, acid solution can rapid osmotic be reacted to FeO layer, and the pickling time of straight carbon steel is shortened to 10-12s by conventional 16-22s; Dual phase steel pickling time in high-strength steel is shortened to 20-25s by 35-45s.
In technical scheme of the present invention, have the function that reduces acid consumption, described band steel, after planisher once breaks phosphorus, the broken phosphorus of multi-roll straightening machine secondary, brushing device dephosphorization, has been removed belt steel surface partial oxide, has reduced chemical reaction amount, has reduced sour consumption.
In technical scheme of the present invention, the breaking elongation comprising brokenly in phosphorus process is controlled function, when planisher is removed belt steel surface oxide, the given setting percentage elongation according to material property, by planisher roll-force dynamic adjustment function, control the breaking elongation of planisher and multi-roll straightening machine, and then guarantee the performance of institute's rapidoprint.
The present invention has not to be affected under the prerequisite of strip property, broken, to remove belt steel surface oxide function, the combination of planisher, multi-roll straightening machine and brushing device, can be when band steel percentage elongation be 0.8%-1.5%, at belt steel surface, form permanent, large-sized crackle, complete fast chemical surface treatment, avoided common Surfaces of Hot Rolled Strip to produce luders band defect; Avoided high-strength steel in carbon steel, IF rigidity to worsen.
In technical scheme of the present invention, comprise secondary plate shape and improve function, band steel enters multi-roll straightening machine after planisher tentatively improves plate shape, and according to belt steel thickness and material, adjusts the registration of smoothing roll up and down of multi-roll straightening machine, further improves plate shape and thickness and precision.
In technical scheme of the present invention, comprise one with the smooth broken phosphorus step of elongation control function, in formation process, the band steel body tissue that extends very capable is attempted to extend forward under roll-force effect, and the Fe of belt steel surface
2o
3, Fe
3o
4organize poor ductility, cannot follow band steel synchronously extends, thereby cause between oxide on surface and band steel body tissue and produce horizontal tangential power, this tangential force impels oxide on surface to peel off from belt steel surface, simultaneously, the upper working rolls and lower working rolls of planisher is compressive zone steel under the effect of roll-force, by the oxide pressure break of belt steel surface, forms many fine and closely woven and oxide crackles that direction is random.
In technical scheme of the present invention, comprise a broken phosphorus dephosphorization step of aligning, to process through planisher, on oxide on surface, with the band steel of fine and closely woven crackle, being sent to multi-roll straightening machine aligns, in aligning process, smoothing roll carries out repeatedly forward and reverse bending by the band steel with fine and closely woven oxide crackle, makes belt steel surface be flattened the further fragmentation of oxide of machine pressure break.
Adopt the beneficial effect after technique scheme to be: a kind of belt steel surface oxide sweep-out method of low acid consumption carbon steel, by the technical program compared with prior art, after 1 processing, the quantity of belt steel surface oxide crackle is more, and the gap of oxide crackle is large, facilitate the acid solution rapid osmotic in acid tank, can significantly promote pickling efficiency; 2 brushing devices by separated with band steel body but still unpeeled oxide further remove, stopped band steel body separated but still unpeeled oxide enter into again descaling bath, thereby greatly reduce acid reaction amount, reduced sour consumption and production cost; After 3 processing, band steel yield strength value added is low, and strip property is substantially unaffected; 4 have eliminated the yield point elongation with steel by the processing of planisher, avoid having stopped, at the frequent luders band forming of common hot rolling product surface, greatly having improved the surface quality with steel.
Accompanying drawing explanation
Fig. 1 is the broken phosphorus schematic diagram of straightening that in prior art, conventional pickling machine adopts.
Fig. 2 is the view of hot-strip straightening front and rear surfaces iron scale 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 process equipment layout drawing of the present invention.
Fig. 5 is the broken phosphorus technique of flattening process in the present invention, aligning and scrubs the equipment structure chart of technique.
Fig. 6 is that in the present invention, planisher percentage elongation is belt steel surface oxide crackle state picture under 0.8%-1.5% state.
In figure, 1 uncoiler, 2 entry loops, 3 withdrawal straightening machines, 4 pickling, 5 outlet loopings, 6 coiling machines, 7 band 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, 30 rinsings, 31 Fe
2o
3, 32 Fe
3o
4, 33 FeO.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment in the present invention is described in further detail.
As shown in Figure 4 and Figure 5, the belt steel surface oxide sweep-out method of a kind of low acid consumption carbon steel the present invention relates to, the described oxide 8 with steel 7 surfaces comprises Fe
2o
331, Fe
3o
432
,feO 33, specifically comprise the steps:
A. uncoiler 1 uncoiling;
B. 11 pairs of the planishers oxide 8 with steel 7 surfaces carries out fragmentation, peels off;
C. 12 pairs of multi-roll straightening machines with the oxides 8 on steel 7 surfaces further broken, peel off;
D. the scrubbing roller in brushing device 15 16 is removed and is come off and loosening oxide 8 with steel 7 surfaces;
E. will carry out pickling 4, rinsing through band steel 7 smooth, that align and scrub after processing;
F. coiling machine 6 batches the band steel 7 after processing to become finished product.
Process of the present invention is flattening process, multiple roll straightening process, scrub the group technology of technique and acid cleaning process, after processing uncoiler 1, dispose the process equipment that planisher 11, multi-roll straightening machine 12, brushing device 15 3 covers possess broken phosphorus, phosphorus removal functional, treated band steel 7 enters acid tank again and carries out pickling 4 processing.
In technical scheme of the present invention, comprise three mechanical types and break phosphorus, phosphorus removal functional, first 11 pairs of the planishers oxide 8 with steel 7 surfaces carries out fragmentation, then 12 pairs of multi-roll straightening machines that utilize planisher 11 outlet broken oxide 8 carry out repeatedly forward and reverse bending, band steel 7 oxide on surface 8 of second-time breakage carbon steel, for the third time finally, utilize 15 pairs of brushing devices to carry out the removing of oxide 8 with steel 7 surfaces, three complete equipment coordinated, remove the oxide 8 on hot-strip 7 surfaces as much as possible.
The present invention has the acid reaction of shortening time function, described with steel 7 after once broken phosphorus, 12 2 broken phosphorus of multi-roll straightening machine, brushing device 15 dephosphorization of planisher 11, on band steel 7 surfaces, formed permanent, large scale oxide crackle 9, now enter again in pickling 4 grooves and carry out chemical dephosphorization, because band steel 7 surfaces possess large-sized oxide crackle 9, acid solution can rapid osmotic be reacted to FeO 33, and 4 times of the pickling of straight carbon steel are shortened to 10-12s by conventional 16-22s; 4 times of dual phase steel pickling in high-strength steel are shortened to 20-25s by 35-45s.
In technical scheme of the present invention, have the function that reduces acid consumption, described band steel 7 once breaks after phosphorus, 12 2 broken phosphorus of multi-roll straightening machine, brushing device 15 dephosphorization through planisher 11, has removed band steel 7 surface element sub-oxides 8, reduce chemical reaction amount, reduced sour consumption.
In technical scheme of the present invention, the breaking elongation comprising brokenly in phosphorus process is controlled function, when steel 7 oxide on surface 8 are with in planisher 11 removings, the given setting percentage elongation according to material property, by planisher 11 roll-force dynamic adjustment function, control the breaking elongation of planisher 11 and multi-roll straightening machine 12, and then guarantee the performance of institute's rapidoprint.
As shown in Figure 6, the present invention has not to be affected under the prerequisite of strip property, broken, remove the function with steel 7 oxide on surface 8, the combination of planisher 11, multi-roll straightening machine 12 and brushing device 15, can be when band steel 7 percentage elongation be 0.8%-1.5%, on band steel 7 surfaces, form permanent, large-sized oxide crackle 9, complete fast chemical surface treatment, avoided common Surfaces of Hot Rolled Strip to produce luders band 10 defects; Avoided high-strength steel in carbon steel, IF rigidity to worsen.
In technical scheme of the present invention, comprise secondary plate shape and improve function, band steel 7 enters multi-roll straightening machine 12 after planisher 11 tentatively improves plate shape, and foundation is with the registration of the smoothing roll up and down 14 of steel 7 thickness and material adjustment multi-roll straightening machine 12, further improves plate shape and thickness and precision.
In technical scheme of the present invention, comprise one with the smooth broken phosphorus step of elongation control function, in formation process, band steel 7 body tissues that extend very capable are attempted to extend forward under roll-force effect, and with the Fe on steel 7 surfaces
2o
331, Fe
3o
432 organize poor ductility, cannot follow band steel 7 synchronously extends, thereby cause between band steel 7 oxide on surface 8 and band steel 7 body tissues and produce horizontal tangential power, this tangential force impels band steel 7 oxide on surface 8 from band steel 7 sur-face peelings, simultaneously, upper working rolls and lower working rolls 13 in planisher 11 compressive zone steel 7 under the effect of roll-force, by oxide 8 pressure breaks with steel 7 surfaces, forms many fine and closely woven and oxide crackles 9 that direction is random.
In technical scheme of the present invention, comprise a broken phosphorus dephosphorization step of aligning, will be through planisher 11 processing, on oxide on surface 8, with the band steel 7 of fine and closely woven crackle, being fed to multi-roll straightening machine 12 aligns, smoothing roll 14 carries out repeatedly forward and reverse bending by the band steel 7 with fine and closely woven oxide crackle 9, makes to be flattened with steel 7 surfaces the further fragmentation of oxide 8 of machine 11 pressure breaks.
At work, being connected with the band steel 7 on entry loop 2 through welding with steel 7 on uncoiler 1, first band steel 7 enters into planisher 11, due to the Fe with steel 7 oxide on surface 8 in the present invention
2o
3, Fe
3o
4the ductility of tissue is poor, add man-hour carrying out planisher 11, band steel 7 body tissues that extend very capable are attempted to extend forward under roll-force effect, this trend is subject to the restriction of the poor oxide on surface of ductility 8, therefore between oxide on surface 8 and band steel 7 body tissues, produce horizontal tangential power, help oxide on surface 8 from band steel 7 sur-face peelings; Meanwhile, the compressive zone steel 7 under the effect of roll-force of the working roll 13 in planisher 11, and by oxide 8 pressure breaks with steel 7 surfaces, forms many fine and closely woven and oxide crackles 9 that direction is random.
The band steel 7 when surface with fine and closely woven oxide crackle 9 leaves after planisher 11, enter into multi-roll straightening machine 12 and carry out the broken phosphorus of secondary, smoothing roll 14 in multi-roll straightening machine 12 makes the forward and reverse bending producing repeatedly with steel 7, with each Forging Process of steel 7, make to be flattened with steel 7 surfaces the further fragmentation of oxide 8 of machine 11 pressure breaks, make further to increase with the oxide crackle 9 on steel 7 oxide on surface 8, make part with the separated oxide 8 of steel 7 body tissues directly come off in planisher 11 simultaneously, in oxide 8 structures with steel 7 surfaces, form permanent oxide crackle 9, this oxide crackle 9 is still retained in band steel 7 surfaces after band steel 7 elastic recoverys, after band steel 7 enters pickling 4, acid solution can rapid osmotic be reacted to FeO 33.
After planisher 11 and the straight machine 12 of multiple roll sedan-chair, with steel 7, enter into the scrubbing roller 16 of brushing device 15, under the rotation of scrubbing roller 16, wire bristle on scrubbing roller 16 is constantly scrubbed band steel 7 surfaces, and extend in the crack of oxide 8, by separated with band steel 7 bodies but still unpeeled oxide 8 further remove, make to be with steel 7 bodies separated but still unpeeled oxide 8 no longer enter into acid tank, reduced acid reaction amount, thereby effectively saved the acid solution in pickling 4, improve the utilization rate of acid solution, reduced sour consumption and production cost.
The present invention manufactures oxide crackle 9 by mechanical combination on the oxide 8 with steel 7 surfaces, and the oxide crackle 9 that forms number and the size of oxide crackle 9 irrelevant with the moulding deflection with steel 7, and with the increase of the yield strength of steel 7 with relevant with the percentage elongation of steel 7, in processing, necessary deflection own is less, to fewer with the performance compromise of product after steel 7 processing, therefore, technical scheme of the present invention is compared with straightening technique of the prior art, maximum advantage, also be that its most significant feature is exactly can be under the prerequisite of not damaging with steel 7 performances, on the oxide 8 with steel 7 surfaces, manufacture oxide crackle 9, to improve acid 4, wash efficiency, thereby greatly improve band steel 7 surface quality.
Technical scheme of the present invention is applied at common hot rolling product scope, because common hot-rolled product is organized the content of intermediate gap atomic carbon, nitrogen and is greater than 30ppm, therefore, in processing and follow-up use procedure, very easily on band steel 7 surfaces, forms luders band 10 defects; And planisher 11 in the present invention can be eliminated the yield point elongation with steel 7, thereby luders band 10 defects of the common hot-rolled product of effectively avoiding and having stopped to be difficult in prior art to avoid.
Technical scheme of the present invention is high-strength steel at carbon steel, the application of IF product made from steel field, 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 process deflection all, in order not damage the performance of material own, during production, must strictly limit percentage elongation, cause pickling 4 efficiency extremely low, the dual phase steel of take in high-strength steel is example, the pickling time of general pickling 4 needs between 30s-40s, therefore, how under as far as possible little deflection prerequisite, the operating efficiency that promotes the pickling 4 of the said goods is a large technical barrier of this series products, the present invention can not occur or only produce under the condition of very little moulding distortion to improve pickling 4 efficiency, by the pickling of pickling 44 time shortens 10-20s, greatly improved operating efficiency, and solved high-strength steel in carbon steel, the a great problem that IF steel is produced.
In embodiments of the invention, the structure of described planisher 11, multi-roll straightening machine 12 and brushing device 15 is prior art, in this its structure, repeats no longer in detail to repeat.
The above, be only better possible embodiments of the present invention, not in order to limit protection scope of the present invention.
Claims (10)
1. low acid consumes a belt steel surface oxide sweep-out method for carbon steel, and the oxide of described belt steel surface comprises Fe
2o
3, Fe
3o
4,feO, specifically comprises the steps:
A. uncoiler uncoiling;
B. planisher carries out fragmentation, peels off the oxide of belt steel surface;
C. multi-roll straightening machine to the oxide of belt steel surface further broken, peel off;
D. the removing of the scrubbing roller in brushing device belt steel surface comes off and loosening oxide;
E. will carry out pickling, rinsing through band steel smooth, that align and scrub after processing;
F. coiling machine becomes finished product by the strip coiling after processing.
2. a kind of low acid according to claim 1 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, this process is flattening process, multiple roll straightening process, scrub the group technology of technique and acid cleaning process, after processing uncoiler, dispose the process equipment that planisher, multi-roll straightening machine, brushing device three covers possess broken phosphorus, phosphorus removal functional, treated band steel enters acid tank again and carries out pickling processing.
3. a kind of low acid according to claim 2 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, comprise three mechanical types and break phosphorus, phosphorus removal functional, first planisher carries out fragmentation to the oxide of belt steel surface, then utilize the multi-roll straightening machine of planisher outlet to carry out repeatedly forward and reverse bending to broken oxide, further broken oxide, finally utilize brushing device to carry out oxide removing to belt steel surface, three complete equipment coordinated, remove the oxide of Surfaces of Hot Rolled Strip as much as possible.
4. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, there is the acid reaction of shortening time function, through planisher, once broken phosphorus, multi-roll straightening machine secondary break after phosphorus, brushing device dephosphorization described band steel, at belt steel surface, formed permanent, large scale oxide crackle, now enter again pickling and carry out chemical dephosphorization, because belt steel surface possesses large-sized oxide crackle, acid solution can rapid osmotic be reacted to FeO layer, and the pickling time of straight carbon steel is shortened to 10-12s by conventional 16-22s; Dual phase steel pickling time in high-strength steel is shortened to 20-25s by 35-45s.
5. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, there is the function that reduces acid consumption, through planisher, once broken phosphorus, multi-roll straightening machine secondary break after phosphorus, brushing device dephosphorization described band steel, removed belt steel surface partial oxide, reduce chemical reaction amount, reduced sour consumption.
6. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, the breaking elongation comprising brokenly in phosphorus process is controlled function, when planisher is removed belt steel surface oxide, by planisher roll-force dynamic adjustment function, control the breaking elongation of planisher and multi-roll straightening machine, and then guarantee the performance of institute's rapidoprint.
7. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, have and do not affecting under the prerequisite of strip property, broken, to remove belt steel surface oxide function, the combination of planisher, multi-roll straightening machine and brushing device, can, when band steel percentage elongation is 0.8%-1.5%, form permanent, large-sized crackle at belt steel surface, complete fast chemical surface treatment, avoided common Surfaces of Hot Rolled Strip to produce luders band defect; Avoided high-strength steel in carbon steel, IF rigidity to worsen.
8. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, comprise secondary plate shape and improve function, band steel enters multi-roll straightening machine after planisher tentatively improves plate shape, and according to belt steel thickness and material, adjust the registration of smoothing roll up and down of multi-roll straightening machine, further improve plate shape and thickness and precision.
9. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, comprise one with the smooth broken phosphorus step of elongation control function, in formation process, the band steel body tissue that extends very capable is attempted to extend forward under roll-force effect, and the Fe of belt steel surface
2o
3, Fe
3o
4organize poor ductility, cannot follow band steel synchronously extends, thereby cause between oxide on surface and band steel body tissue and produce horizontal tangential power, this tangential force impels oxide on surface to peel off from belt steel surface, upper working rolls and lower working rolls compressive zone steel under the effect of roll-force in while planisher, by the oxide pressure break of belt steel surface, form many fine and closely woven and oxide crackles that direction is random.
10. a kind of low acid according to claim 3 consumes the belt steel surface oxide sweep-out method of carbon steel, it is characterized in that, comprise a broken phosphorus dephosphorization step of aligning, to process through planisher, on oxide on surface, with the band steel of fine and closely woven crackle, being fed to multi-roll straightening machine aligns, in aligning process, smoothing roll carries out repeatedly forward and reverse bending by the band steel with fine and closely woven oxide crackle, makes belt steel surface be flattened the further fragmentation of oxide of machine pressure break.
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| CN114645195A (en) * | 2020-10-31 | 2022-06-21 | 日照宝华新材料有限公司 | Hot-rolled pickled sheet band without transverse crease defect |
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| CN114645195B (en) * | 2020-10-31 | 2023-01-31 | 日照宝华新材料有限公司 | Hot-rolled pickled sheet band without transverse crease defect |
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