CN103920726A - High-surface-quality carbon steel pickling technique - Google Patents
High-surface-quality carbon steel pickling technique Download PDFInfo
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- CN103920726A CN103920726A CN201410118432.2A CN201410118432A CN103920726A CN 103920726 A CN103920726 A CN 103920726A CN 201410118432 A CN201410118432 A CN 201410118432A CN 103920726 A CN103920726 A CN 103920726A
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Abstract
The invention relates to a high-surface-quality carbon steel pickling technique. The technique specifically includes the following steps: uncoiling via an uncoiler; breaking and stripping oxides on the surface of strip steel via a withdrawal and straightening unit; subjecting the strip steel to pickling; feeding the strip steel subjected to pickling into a mechanical grinding device for mechanical surface grinding treatment to have surface defects repaired; feeding the treated strip steel into a finishing machine for surface roughness uniformization finishing treatment; recoiling the treated strip steel into a finished product via a recoiler. Through the technique, the mechanical grinding device is added to a rinsing section of a conventional carbon steel pickling line, one-stage, two-stage, three-stage or multiple-stage surface grinding treatment is performed on the pickled strip steel through the device, aberration and surface defects after pickling are eliminated, and surface quality of the product is improved.
Description
Technical field
The invention belongs to the flat material deep process technology of ordinary hot draw down field, particularly relate to a kind of great surface quality carbon steel pickling process.
Background technology
In hot-strip production process, band steel top layer Fe atom can react with airborne oxygen, produce oxide iron sheet, existing technology, adopt acid cleaning process to carry out surface treatment to hot-strip, remove oxide on surface, the hot-strip after pickling can directly be used also can become cold-rolled products after cold rolling.
As shown in Figure 1, Figure 2 and Figure 3, in the ideal situation, with the oxide on steel 7 surfaces, the oxide from top layer to nexine is respectively Fe
2o
331, Fe
3o
432, FeO 33, the complexity of above-mentioned three kinds of oxides and acid reaction is different, is positioned at undermost FeO 33 and the most easily reacts with pickling, in this state, acid solution and oxide and with the reaction time of steel 7 bodies basic identical, after pickling, be with steel 7 surface quality even; Yet, in actual production, part Fe
3o
432 can be deposited on band steel 7 surfaces, due to Fe
3o
432 is different with the reaction time of acid solution from FeO 33, thereby cause acid solution and inhomogeneous reaction with 7 of steel, cause with steel 7 surface quality, can not meet the instructions for use of most products after pickling.
As previously mentioned, because the oxide with steel 7 surfaces exists Fe
3o
432 deposition, therefore, band steel 7 surfaces after overpickling still exist color and luster inequality and tiny flaw, and these surface quality defects are that restriction is with a key technology difficult problem of hot Dai Leng.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of great surface quality carbon steel pickling process, pass through the technical program, band steel after adopting mechanical surface grinding technics to pickling carries out surface treatment, eliminate aberration and blemish after pickling, promote surface quality, with the surface quality requirement of heat cold product of generation.
In order to achieve the above object, technical scheme of the present invention is achieved in that a kind of great surface quality carbon steel pickling process, specifically comprises the steps:
A. uncoiler uncoiling;
B. withdrawal straightening machine carries out fragmentation, peels off the oxide of belt steel surface;
C. band steel is carried out to pickling, rinsing;
D. the band steel through overpickling is entered into mechanical lapping equipment and carry out mechanical surface milled processed, repair blemish;
E. the band steel through above-mentioned processing is entered to polishing machine and carry out the processing of even surface roughness polishing;
F. the band steel after processing is batched and becomes finished product through coiling machine.
This process is straightening technique, acid cleaning process, rinsing process, mechanical surface grinding technics and the group technology of controlling the polishing treatment process of roughness, unit is by uncoiler, entry loop, withdrawal straightening machine, pickling, rinsing, mechanical lapping equipment, outlet looping, polishing machine and coiling machine form, after processing uncoiler 1, dispose withdrawal straightening machine and carry out the broken phosphorus of straightening, treated band steel enters acid tank and carries out pickling processing, and then the band steel after pickling is entered into mechanical lapping equipment carry out mechanical surface grinding, finally to above-mentioned, with steel, enter into the polishing processing that polishing machine carries out even surface roughness processing again.
In the present invention, in the rinsing section of ordinary carbon steel pickling unit, increased mechanical surface milled processed technique, eliminated the part mass defect of belt steel surface, made strip surface quality be better than the smooth product of common pickling.
In the present invention, the carbon steel product introduction through overpickling is carried out to mechanical surface milled processed to mechanical lapping equipment, after one-level or two-stage or three grades of mechanical surface milled processed, can obtain the hot rolling acid-cleaning product of different surface roughness.
Adopt the beneficial effect after technique scheme to be: a kind of great surface quality carbon steel pickling process, pass through the technical program, rinsing section at conventional carbon steel pickling unit is set up mechanical lapping equipment, band steel by this device after to pickling carries out one-level, two-stage, three grades or multistage surperficial milled processed, eliminate aberration and blemish after pickling, improving product surface quality.
Accompanying drawing explanation
Fig. 1 is the desirable oxide structure picture of belt steel surface.
Fig. 2 is the oxide structure picture of belt steel surface reality.
Fig. 3 is the strip surface quality picture after prior art pickling.
Fig. 4 is process equipment layout drawing of the present invention.
Mechanical lapping equipment structural representation in Fig. 5 the present invention.
In figure, 1 uncoiler, 2 entry loops, 3 withdrawal straightening machines, 4 pickling, 5 outlet loopings, 6 coiling machines, 7 band steel, 17 mechanical lapping equipments, 18 backing rolls, 19 mixing rolls, 22 polishing machines, 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, a kind of great surface quality carbon steel pickling process the present invention relates to, specifically comprises the steps:
A. uncoiler 1 uncoiling;
B. 3 pairs of the withdrawal straightening machines oxide with steel 7 surfaces carries out fragmentation, peels off;
C. band steel 7 is carried out to pickling 4, rinsing 30;
D. the band steel through overpickling 4 is entered into mechanical lapping equipment 17 and carry out mechanical surface milled processed, repair blemish;
E. the band steel 7 through above-mentioned processing is entered to polishing machine 22 and carry out the processing of even surface roughness polishing;
F. the band steel 7 after processing is batched and becomes finished product through coiling machine 6.
This process is straightening technique, acid cleaning process, rinsing process, mechanical surface grinding technics and the group technology of controlling the polishing treatment process of roughness, unit is by uncoiler 1, entry loop 2, withdrawal straightening machine 3, pickling 4, fuller 30, mechanical lapping equipment 17, outlet looping 5, polishing machine 22 and coiling machine 6 form, after processing uncoiler 1, dispose withdrawal straightening machine 3 and carry out the broken phosphorus of straightening, treated band steel 7 enters acid tank and carries out pickling 4 processing, and then the band steel 7 after pickling 4 is entered into mechanical lapping equipment 17 carry out mechanical surface grinding, finally to above-mentioned, with steel 7, enter into the polishing processing that polishing machine 22 carries out even surface roughness processing again.
In technical scheme of the present invention, in the rinsing section of ordinary carbon steel pickling unit, increased mechanical surface milled processed technique, eliminated the part mass defect of belt steel surface, made strip surface quality be better than the smooth product of common pickling.
In the present invention, the carbon steel product introduction through overpickling 4 is carried out to mechanical surface milled processed to mechanical lapping equipment 17, after one-level or two-stage or three grades of mechanical surface milled processed, can obtain hot rolling acid-cleaning 4 products of different surface roughness.
The present invention at work, band steel 7 out enters into afterwards one-level rinsing 30 grooves from pickling 4 grooves, one-level rinsing 30 grooves adopt high-pressure wash method to remove the acid solution with steel 7 surfaces, band steel 7 enters into mechanical lapping equipment 17 from one-level rinsing 30 grooves out, mechanical lapping equipment 17 adopts the 19 pairs of band steel 7 of mixing roll with the abrasive material of AlO to carry out surface treatment, and on mixing roll 19, the granularity of subsidiary abrasive material determines the roughness with steel 7 surfaces.
In the present invention, mechanical lapping equipment 17 is when cleaning band steel 7 upper surface, first mixing roll 19 is configured in top, below is backing roll 18, second top is backing roll 18, below is mixing roll 19, two backing rolls 18 and two mixing rolls 19 are one group, can be according to the requirement of finished strip 7 surface quality, configure more than one group mixing roll 19 and backing roll 18, described mixing roll 19 is being with the surperficial High Rotation Speed of steel 7 with the linear velocity of 1000m/min-3000m/min, under the acting in conjunction of mixing roll 19 frictions and abrasive lapping, removing is with tiny flaw and the aberration on steel 7 surfaces.
The above, be only better possible embodiments of the present invention, not in order to limit protection scope of the present invention.
Claims (4)
1. a great surface quality carbon steel pickling process, is characterized in that, specifically comprises the steps:
A. uncoiler uncoiling;
B. withdrawal straightening machine carries out fragmentation, peels off the oxide of belt steel surface;
C. band steel is carried out to pickling, rinsing;
D. the band steel through overpickling is entered into mechanical lapping equipment and carry out mechanical surface milled processed, repair blemish;
E. the band steel through above-mentioned processing is entered to polishing machine and carry out the processing of even surface roughness polishing;
F. the band steel after processing is batched and becomes finished product through coiling machine.
2. a kind of great surface quality carbon steel pickling process according to claim 1, it is characterized in that, this process is straightening technique, acid cleaning process, rinsing process, mechanical surface grinding technics and the group technology of controlling the polishing treatment process of roughness, unit is by uncoiler, entry loop, withdrawal straightening machine, pickling, rinsing, mechanical lapping equipment, outlet looping, polishing machine and coiling machine form, after processing uncoiler, dispose withdrawal straightening machine and carry out the broken phosphorus of straightening, treated band steel enters acid tank and carries out pickling processing, and then the band steel after pickling is entered into mechanical lapping equipment carry out mechanical surface grinding, finally more above-mentioned band steel is entered into polishing machine and carry out the processing of even surface roughnessization processing polishing.
3. a kind of great surface quality carbon steel pickling process according to claim 2, it is characterized in that, rinsing section at ordinary carbon steel pickling unit has increased mechanical surface milled processed technique, eliminated the part mass defect of belt steel surface, made strip surface quality be better than the smooth product of common pickling.
4. a kind of great surface quality carbon steel pickling process according to claim 3, it is characterized in that, carbon steel product introduction through overpickling is carried out to mechanical surface milled processed to mechanical lapping equipment, after one-level or two-stage or three grades of mechanical surface milled processed, can obtain the hot rolling acid-cleaning product of different surface roughness.
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| CN201410118432.2A CN103920726B (en) | 2014-03-27 | 2014-03-27 | High-surface-quality carbon steel pickling technique |
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| CN201410118432.2A CN103920726B (en) | 2014-03-27 | 2014-03-27 | High-surface-quality carbon steel pickling technique |
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| CN103920726A true CN103920726A (en) | 2014-07-16 |
| CN103920726B CN103920726B (en) | 2017-01-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690109A (en) * | 2015-04-03 | 2015-06-10 | 秦皇岛新禹机械设备有限公司 | Online-typed wire rod skin processing system |
| CN114130842A (en) * | 2021-11-29 | 2022-03-04 | 东北大学 | Method for removing oxide skin of high Cr-Si alloyed 1000-plus 1800 MPa-level hot forming steel |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690109A (en) * | 2015-04-03 | 2015-06-10 | 秦皇岛新禹机械设备有限公司 | Online-typed wire rod skin processing system |
| CN104690109B (en) * | 2015-04-03 | 2016-06-01 | 秦皇岛新禹机械设备有限公司 | A kind of in linear wire epidermis treatment system |
| CN114130842A (en) * | 2021-11-29 | 2022-03-04 | 东北大学 | Method for removing oxide skin of high Cr-Si alloyed 1000-plus 1800 MPa-level hot forming steel |
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| CN103920726B (en) | 2017-01-18 |
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