CN113477709A - Production process suitable for controlling oil stains on surface of austenitic cold-rolled stainless steel - Google Patents
Production process suitable for controlling oil stains on surface of austenitic cold-rolled stainless steel Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 52
- 239000010935 stainless steel Substances 0.000 title claims abstract description 52
- 238000005096 rolling process Methods 0.000 claims abstract description 58
- 238000005097 cold rolling Methods 0.000 claims abstract description 25
- 238000000137 annealing Methods 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 11
- 238000005554 pickling Methods 0.000 claims abstract description 11
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 72
- 238000007790 scraping Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 19
- 239000010731 rolling oil Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 2
- 230000007547 defect Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000533950 Leucojum Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a production process suitable for controlling oil stains on the surface of austenitic cold-rolled stainless steel, which comprises the steps of annealing, scale breaking, shot blasting and acid pickling of a hot-rolled black coil by a hot-rolled annealing and acid pickling unit in sequence, then preparing a No.1 plate from the hot-rolled black coil, carrying out cold rolling on the No.1 plate by a rolling mill of the production unit, preparing the No.1 plate into a cold-rolled coil, annealing and acid pickling the cold-rolled coil by a cold-plate annealing and acid pickling unit in sequence, then preparing the cold-rolled coil into a cold-rolled stainless steel 2D surface, carrying out leveling work on the cold-rolled stainless steel 2D surface by a leveling unit, and preparing the cold-rolled stainless steel 2D surface into a stainless steel 2B surface. And the pollution to the environment when the grinding surface is polished is reduced.
Description
Technical Field
The invention belongs to the field of application of stainless steel cold-rolled products, and particularly relates to a production process suitable for controlling oil stains on the surface of austenitic cold-rolled stainless steel.
Background
In the production process of the cold-rolled stainless steel sheet, the rolling process is an important process for controlling the plate shape, the thickness and the surface quality, and the rolling processes such as the reduction, the rolling pass table, the oil supply amount, the roll system configuration and the like are important for controlling the rolling quality.
In actual production, white greasy quality defects often appear on the surface of a cold plate after rolling, and the defects are caused by uneven distribution of residual rolling oil on the surface; in the process of actually applying the stainless steel, for example, in the industries of decoration, elevator, household electrical appliances, tableware and the like, the non-treated 2B surface is adopted, and the defects such as color difference caused by white oil stains and the like do not meet the use requirements; meanwhile, the oil stain on the surface of the cold-rolled coil seriously influences the self corrosion resistance of the stainless steel, so that the rolling process is optimized, the residual rolling oil on the surface of the stainless steel after cold rolling is reduced, and the method is very important for the surface quality and the application of the stainless steel.
In the actual cold rolling process, the following white oil stain defects are easily caused due to improper rolling process:
the defects appear symmetrically on the front side and the back side of the cold-rolled coil, are in block whitening and irregular sawtooth shapes, are basically concentrated at 1/4 of the width of the cold-rolled coil, and gradually reduce the quantity and the degree of the defects from the head of the cold-rolled coil;
snowflake point-like oil patterns which are unevenly distributed on the whole surface of the cold-rolled coil;
due to the fact that the plate temperature is too high after the cold-rolled coil is rolled, the plate is too long in standing time, and the process paper absorbs oil and is heated to be printed on the surface of the steel strip.
Disclosure of Invention
In view of the above, the present invention is directed to a production process suitable for controlling oil contamination on the surface of an austenitic cold-rolled stainless steel, so as to reduce the residual rolling oil on the surface of a cold-rolled coil after cold rolling and reduce the probability of white oil contamination on the cold-rolled coil as much as possible.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a production process suitable for controlling oil stains on the surface of austenitic cold-rolled stainless steel comprises the following steps:
a1: annealing, descaling, shot blasting and acid washing the hot-rolled black coil in sequence by a hot-rolling annealing acid washing machine, and then manufacturing the hot-rolled black coil into a No.1 plate;
a2: carrying out cold rolling work on the No.1 plate by a rolling mill of a production unit, and manufacturing the No.1 plate into a cold-rolled coil;
a3: annealing and pickling the cold-rolled coil by a cold plate annealing and pickling unit in sequence, and then manufacturing the cold-rolled coil into a cold-rolled stainless steel 2D surface;
a4: carrying out leveling work on the cold-rolled stainless steel 2D surface by a leveling unit, and manufacturing the cold-rolled stainless steel 2D surface into a stainless steel 2B surface;
a5: sequentially carrying out edge cutting, coil splitting and warehousing on the surface of the stainless steel 2B;
a6: sampling detection work is carried out on the surface of the stainless steel 2B after the A5 warehouse entry.
Further, a twenty-high sendzimir mill is adopted as a rolling mill of the production unit in the step a2, an uncoiler, an inlet plate-shaped roller, an inlet thickness gauge, an inlet oil scraping roller, a rolling mill housing, an outlet oil scraping roller, an outlet thickness gauge, an outlet plate-shaped roller and a coiler are sequentially installed on the rolling mill from the inlet end to the outlet end, and the No.1 plate is manufactured into a cold-rolled coil after sequentially passing through the inlet plate-shaped roller, the inlet thickness gauge, the inlet oil scraping roller, the rolling mill housing, the outlet oil scraping roller, the outlet thickness gauge and the outlet plate-shaped roller in the production unit.
Further, the inlet plate-shaped roller and the outlet plate-shaped roller of the production unit in the step A2 are in contact type, the inlet plate-shaped roller and the outlet plate-shaped roller are divided into a plurality of annular sections along the width direction of the No.1 plate, each section is provided with a pressure sensor, the No.1 plate forms a wrap angle at the inlet plate-shaped roller and the outlet plate-shaped roller respectively, and the condition of the No.1 plate shape in the cold rolling working process is reflected by measuring the radial force of the No.1 plate.
Further, the inlet thickness gauge and the outlet thickness gauge of the production unit in the step a2 are respectively installed on a C-shaped frame with a track, and both the C-shaped frames can move in during cold rolling work to enable the inlet thickness gauge and the outlet thickness gauge to respectively perform thickness measurement work and move out during non-cold rolling work to enable the inlet thickness gauge and the outlet thickness gauge not to perform thickness measurement work
Further, an inlet oil scraping roller and an outlet oil scraping roller of the production unit in the step A2 are respectively installed at the inlet end of the rolling mill housing and the outlet end of the rolling mill housing, the inlet oil scraping roller and the outlet oil scraping roller respectively comprise two pairs of rollers which are adjusted hydraulically, the two pairs of rollers are made of non-woven fabrics
Further, the roll system of the mill housing of the production unit in the step a2 includes 10 upper rolls and 10 lower rolls, two pyramid structures are formed, four groups of spray beams are respectively installed on two sides of the roll system and above and below the No.1 plate, each spray beam is provided with a nozzle, the nozzle has two directions and sprays rolling oil against the No.1 plate and the roll system, and the flow rates of the rolling oil at the inlet end and the outlet end of the mill housing are independently controlled, compared with the prior art, the production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel has the following beneficial effects:
(1) according to the production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel, the possibility of white oil stain occurrence can be reduced to the maximum extent through the step A2, the surface color of a cold-rolled coil is uniform and fine, the roughness of the surface of the stainless steel 2B is Ra0.08, the quality cut loss of the cold-rolled coil due to oil stain defects is reduced, the yield and the qualified rate of the surface of the stainless steel 2B are improved, by adopting the process, the product degradation and waste materials caused by the white oil stain are greatly reduced, the effect is increased by about 50 ten thousand yuan all the year around, the surface quality of the stainless steel 2B product is obviously improved, and meanwhile, when downstream users use the surface of the stainless steel 2B to carry out deep processing such as polishing, grinding and the like, the amount of the ground surface is reduced, and the pollution to the environment is reduced.
(2) The production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel reflects the plate shape condition of the No.1 plate in the cold-rolling working process by measuring the radial force of the No.1 plate, the radial force of the part of the No.1 plate with large extension is small, the radial force of the part of the No.1 plate with small extension is large under the action of coiling tension, and workers can know the plate shape condition of the No.1 plate in the cold-rolling working process by monitoring; the inlet oil scraping roller and the outlet oil scraping roller respectively comprise two pairs of hydraulically adjusted rollers, the two pairs of rollers are made of non-woven fabrics, the oil scraping efficiency is improved, and the lower roller is supported by the worm gear case, so that the rollers are maintained on a rolling line after being maintained; the four groups of spray beams are used for cooling and lubricating, and the rolling oil is used for cooling the cold-rolled coil and the roller system and lubricating the roller system and the oil scraping roller bearing.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a simplified schematic diagram of a rolling mill of a production train according to an embodiment of the present invention;
fig. 2 is a schematic view of a rolling mill housing according to an embodiment of the present invention.
Description of reference numerals:
1-uncoiler; 2-entrance plate-shaped roll; 3-entrance thickness gauge; 4-inlet squeegee; 5-rolling mill housing; 6-outlet oil scraping roller; 7-outlet thickness gauge; 8-exit plate rolls; 9-coiling machine.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The noun explains:
pass: in the rolling process of the rolling mill, the cold rolling coil is completely rolled from left to right in one pass, and the thickness of the cold rolling coil is changed in each pass from right to left in another pass.
The white oil stain process and key process parameters are controlled in the rolling process of the rolling mill, and the key process parameters are as follows:
the requirements of the reduction rate are as follows:
and (3) rolling the hot rolled coil 2B to limit the pass reduction rate and the speed of the finished product:
by controlling the rolling reduction of the cold-rolled coil pass, the heat generated by rolling deformation of the cold-rolled coil pass is reduced, the rolling speed of the cold-rolled coil pass is reduced, the contact time of a cooling liquid and the surface of the cold-rolled coil is increased, the cooling effect is improved, and oil stain defects such as oil marks and paper oil marks are controlled.
The cold-rolled coil pass reduction and speed are shown in the following table:
| actual thickness (mm) | Finish rolling reduction (%) | Finish rolling speed (mpm) |
| h≥1.15 | ≥6％，≤7％ | ≤85 |
| 1.0<h<1.15 | ≥8％，≤11％ | ≤200 |
| h≤1.0 | ≥9％，≤12％ | ≤300 |
The requirement of the standing time after the cold-rolled coil is rolled is as follows:
according to the rolling thickness specification, the cold-rolled coil with the cold-rolled coil pass thickness of more than 1.2mm needs to be padded with paper during rolling, and the cold-rolled coil after rolling needs to be subjected to cold line annealing and acid pickling within 24 hours, so that paper oil marks caused by overlong standing time are prevented; the cold-rolled coil with the cold-rolled coil pass thickness of less than 1.2mm does not need to be padded, the cold-rolled coil without the padded paper can properly prolong the standing time, and the paper oil mark is controlled by strict requirements on the standing time after rolling.
The rolling packing paper cold rolled coil placing time is shown in the following table:
| nominal thickness (mm) | Standing time (h) |
| H＞1.2 | ≤24 |
| h≤1.2 | Without special requirements |
A tension system:
by controlling the rolling tension, the improvement effect on the plate shape in the rolling process is improved, and the phenomenon that the edge extends too much and the edge with poor plate shape causes oil marks is controlled;
for all thickness specifications, the total tension before and after the first pass is respectively 50t and 20-30 t;
when the actual thickness is more than or equal to 1.15mm, the front tension is always kept at 50t, and the rear tension is gradually increased to 50t along with the increase of the number of passes, so that the uniform reduction of the front tension difference and the rear tension difference is ensured;
the actual thickness is less than 1.15mm, and the unit tension is controlled to be about 27-32 kg/mm 2;
for cold-rolled coils, setting the first pass tension to be close to the tension of a finished product of the first rolling; the difference of the rolling reduction of the previous pass of cold rolling and the pass of cold rolling is not more than 3%.
Setting the fuel injection quantity:
rough rolling and oil feeding in the middle pass:
according to the principle that the temperature of the strip steel at the outlet of the rolling mill does not exceed 160 ℃ and no obvious metal powder exists on the surface of the cold-rolled coil, the injection quantity of rolling oil is reasonably distributed, the cooling effect of the cold-rolled coil can be ensured, the deflection and the coil unwinding can be prevented, a good plate shape can be obtained, and according to experimental investigation, the following setting method is adopted, so that the effect of preventing the surface of the cold-rolled coil from generating white oil stains is better.
The oil feed for the first and middle passes is shown in the following table:
the setting method of the rolling oil supply amount comprises the following steps:
and determining the minimum oil supply amount of the rolling oil according to the thickness of the cold-rolled coil. For example: if the inlet is to feed 3600L/min of oil, the outlet is the same as this. All main filters are in an automatic state.
Oil supply for cold rolling pass
When the paper is padded, the maximum injection amount of the rolling oil is used, and the cooling effect of the cold-rolled coil is improved.
The oil feeding amount of the finish rolling pass is shown in the following table:
as shown in fig. 1-2, a production process suitable for controlling oil stains on the surface of austenitic cold-rolled stainless steel comprises the following steps: the method comprises the following steps:
a1: annealing, descaling, shot blasting and acid washing the hot-rolled black coil in sequence by a hot-rolling annealing acid washing machine, and then manufacturing the hot-rolled black coil into a No.1 plate;
a2: carrying out cold rolling work on the No.1 plate by a rolling mill of a production unit, and manufacturing the No.1 plate into a cold-rolled coil;
a3: annealing and pickling the cold-rolled coil by a cold plate annealing and pickling unit in sequence, and then manufacturing the cold-rolled coil into a cold-rolled stainless steel 2D surface;
a4: carrying out leveling work on the cold-rolled stainless steel 2D surface by a leveling unit, and manufacturing the cold-rolled stainless steel 2D surface into a stainless steel 2B surface;
a5: sequentially carrying out edge cutting, coil splitting and warehousing on the surface of the stainless steel 2B;
a6: sampling detection work is carried out on the surface of the stainless steel 2B after the A5 warehouse entry.
As shown in fig. 1, the rolling mill of the production unit in the step a2 adopts a twenty-high sendzimir mill, the rolling mill is sequentially provided with an uncoiler 1, an inlet plate-shaped roller 2, an inlet thickness gauge 3, an inlet oil scraping roller 4, a rolling mill housing 5, an outlet oil scraping roller 6, an outlet thickness gauge 7, an outlet plate-shaped roller 8 and a coiler 9 from an inlet end to an outlet end, No.1 plate is manufactured into a cold-rolled coil after sequentially passing through the inlet plate-shaped roller 2, the inlet thickness gauge 3, the inlet oil scraping roller 4, the rolling mill housing 5, the outlet oil scraping roller 6, the outlet thickness gauge 7 and the outlet plate-shaped roller 8 in the production unit, the possibility of occurrence of white oil stains can be maximally reduced, the surface color of the cold-rolled coil is uniform and fine, the surface roughness of the stainless steel 2B is ra0.08, the quality loss of the cold-rolled coil due to oil stains is reduced, the yield and the qualified rate of the surface of the stainless steel 2B are improved, and the product degradation and waste caused by the white oil stains are greatly reduced, the effect is increased by about 50 ten thousand yuan all the year round, the surface quality of the stainless steel 2B product is obviously improved, and meanwhile, the amount of ground surfaces is reduced and the pollution to the environment is reduced when the downstream user uses the stainless steel 2B surface for deep processing such as polishing, grinding and the like;
the inlet plate-shaped roller 2 and the outlet plate-shaped roller 8 of the production unit in the step A2 are in contact, the inlet plate-shaped roller 2 and the outlet plate-shaped roller 8 are divided into a plurality of annular sections along the width direction of the No.1 plate, each section is provided with a pressure sensor, the No.1 plate forms a wrap angle at the inlet plate-shaped roller 2 and the outlet plate-shaped roller 8 respectively, the condition of the No.1 plate shape in the cold rolling working process is reflected by measuring the radial force of the No.1 plate, the radial force of the part of the No.1 plate with large extension is small, the radial force of the part of the No.1 plate with small extension is large under the action of the coiling tension, and the working personnel can know the condition of the No.1 plate shape in the cold rolling working process through monitoring, wherein the model of the pressure sensor is PFSK 152;
step A2, respectively installing an inlet thickness gauge 3 and an outlet thickness gauge 7 of the production unit on a C-shaped frame with a track, wherein the two C-shaped frames can move in during cold rolling work, so that the inlet thickness gauge 3 and the outlet thickness gauge 7 respectively perform thickness measurement work, and move out during non-cold rolling work, so that the inlet thickness gauge 3 and the outlet thickness gauge 7 do not perform thickness measurement work, and the inlet thickness gauge 3 and the outlet thickness gauge 7 both use X-rays to penetrate through a No.1 plate, so that the change of the intensity of the X-rays is related to the thickness of the No.1 plate, and the thickness of the No.1 plate in the cold rolling work is measured;
the inlet oil scraping roller 4 and the outlet oil scraping roller 6 of the production unit in the step A2 are respectively installed at the inlet end of the rolling mill housing 5 and the outlet end of the rolling mill housing 5, so that the rolling oil can be kept in the rolling mill housing 5, the inlet oil scraping roller 4 and the outlet oil scraping roller 6 respectively comprise two pairs of rollers which are hydraulically adjusted, the two pairs of rollers are made of non-woven fabrics, the oil scraping efficiency is improved, and the rollers below are supported by the worm gear box, so that the rollers are maintained on a rolling line after maintenance.
As shown in fig. 2, the roll system of the mill housing 5 of the production line in step a2 includes 10 upper rolls and 10 lower rolls, forming two pyramids, four sets of spray beams are respectively installed on two sides of the roll system and above and below the No.1 plate, each spray beam is installed with a spray nozzle, the spray nozzles have two directions and spray rolling oil against the No.1 plate and the roll system, the flow rate of the rolling oil at the inlet end and the outlet end of the mill housing 5 is independently controlled, the four sets of spray beams are used for cooling and lubricating, and the rolling oil is used for cooling the cold-rolled coil and the roll system and lubricating the roll system and oil scraping roller bearings.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A production process suitable for controlling oil stains on the surface of austenitic cold-rolled stainless steel is characterized by comprising the following steps: the method comprises the following steps:
a1: annealing, descaling, shot blasting and acid washing the hot-rolled black coil in sequence by a hot-rolling annealing acid washing machine, and then manufacturing the hot-rolled black coil into a No.1 plate;
a2: carrying out cold rolling work on the No.1 plate by a rolling mill of a production unit, and manufacturing the No.1 plate into a cold-rolled coil;
a3: annealing and pickling the cold-rolled coil by a cold plate annealing and pickling unit in sequence, and then manufacturing the cold-rolled coil into a cold-rolled stainless steel 2D surface;
a4: carrying out leveling work on the cold-rolled stainless steel 2D surface by a leveling unit, and manufacturing the cold-rolled stainless steel 2D surface into a stainless steel 2B surface;
a5: sequentially carrying out edge cutting, coil splitting and warehousing on the surface of the stainless steel 2B;
a6: sampling detection work is carried out on the surface of the stainless steel 2B after the A5 warehouse entry.
2. The production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel according to the claim 1, characterized in that: a twenty-roller sendzimir rolling mill is adopted as a rolling mill of the production unit in the step A2, an uncoiler (1), an inlet plate-shaped roller (2), an inlet thickness gauge (3), an inlet oil scraping roller (4), a rolling mill housing (5), an outlet oil scraping roller (6), an outlet thickness gauge (7), an outlet plate-shaped roller (8) and a coiling machine (9) are sequentially installed on the rolling mill from an inlet end to an outlet end, and No.1 plates sequentially pass through the inlet plate-shaped roller (2), the inlet thickness gauge (3), the inlet oil scraping roller (4), the rolling mill housing (5), the outlet oil scraping roller (6), the outlet thickness gauge (7) and the outlet plate-shaped roller (8) in the production unit and are manufactured into cold-rolled coils.
3. The production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel according to the claim 2, characterized in that: the inlet plate-shaped roller (2) and the outlet plate-shaped roller (8) of the production unit in the step A2 both adopt a contact type, the inlet plate-shaped roller (2) and the outlet plate-shaped roller (8) are divided into a plurality of annular sections along the width direction of the No.1 plate, each section is provided with a pressure sensor, the No.1 plate forms a wrap angle at the inlet plate-shaped roller (2) and the outlet plate-shaped roller (8), and the No.1 plate shape condition in the cold rolling working process is reflected by measuring the radial force of the No.1 plate.
4. The production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel according to the claim 2, characterized in that: and A2, respectively installing an inlet thickness gauge (3) and an outlet thickness gauge (7) of the production unit on a C-shaped frame with a track, wherein the two C-shaped frames can move in during cold rolling work, so that the inlet thickness gauge (3) and the outlet thickness gauge (7) respectively perform thickness measurement work, and move out during non-cold rolling work, so that the inlet thickness gauge (3) and the outlet thickness gauge (7) do not perform thickness measurement work.
5. The production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel according to the claim 2, characterized in that: and A2, respectively installing an inlet oil scraping roller (4) and an outlet oil scraping roller (6) of the production unit at the inlet end of the rolling mill housing (5) and the outlet end of the rolling mill housing (5), respectively, wherein the inlet oil scraping roller (4) and the outlet oil scraping roller (6) respectively comprise two pairs of rollers which are adjusted hydraulically, and the two pairs of rollers are made of non-woven fabrics.
6. The production process suitable for controlling the oil stain on the surface of the austenitic cold-rolled stainless steel according to the claim 2, characterized in that: the roll system of the mill housing (5) of the production unit in the step A2 comprises 10 upper rolls and 10 lower rolls to form two pyramid structures, four groups of spraying beams are respectively arranged on two sides of the roll system and above and below the No.1 plate, each spraying beam is provided with a nozzle, the nozzles have two directions and respectively spray rolling oil opposite to the No.1 plate and the roll system, and the flow rates of the rolling oil at the inlet end and the outlet end of the mill housing (5) are independently controlled.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114669597A (en) * | 2022-03-15 | 2022-06-28 | 武汉钢铁有限公司 | Cold rolling single-stand rolling mill |
| CN117443931A (en) * | 2023-12-22 | 2024-01-26 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
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