CN117680498A - Treatment method of hot rolled steel plate for container - Google Patents
Treatment method of hot rolled steel plate for container Download PDFInfo
- Publication number
- CN117680498A CN117680498A CN202311550658.5A CN202311550658A CN117680498A CN 117680498 A CN117680498 A CN 117680498A CN 202311550658 A CN202311550658 A CN 202311550658A CN 117680498 A CN117680498 A CN 117680498A
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- Prior art keywords
- steel plate
- steel sheet
- roller
- cleaning
- container
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 143
- 239000010959 steel Substances 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000004140 cleaning Methods 0.000 claims abstract description 61
- 238000005096 rolling process Methods 0.000 claims abstract description 39
- 238000004049 embossing Methods 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 9
- 230000005489 elastic deformation Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005422 blasting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical group O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Cleaning In General (AREA)
Abstract
The application discloses a treatment method of a hot rolled steel plate for a container, which comprises a scale breaking process, a cleaning process and a rolling process. The descaling process can alternately bend and deform the steel plate upwards and downwards along the treatment direction so that the oxide scale on the surface of the steel plate is at least partially broken and separated from the surface of the steel plate; the cleaning process can separate the residual attached oxide scale on the surface of the steel plate from the surface of the steel plate, and the oxide scale separated from the surface of the steel plate is removed; the rolling process can roll-cool the steel sheet and make the surface of the steel sheet have a predetermined roughness. According to the method for treating the hot rolled steel plate for the container, the steel plate can be alternately bent and deformed upwards and downwards along the treatment direction, so that the oxide skin on the surface of the steel plate is at least partially broken and separated from the surface of the steel plate; the oxide skin can be effectively cleaned, and then the surface of the steel plate is subjected to rolling to obtain preset roughness, so that the production requirement is met.
Description
Technical Field
The application relates to the technical field of containers, in particular to a treatment method of a hot rolled steel plate for a container.
Background
In large-scale industrial production, hot rolled steel sheet scale removal generally adopts two modes of acid chemical combination and physical removal. Among them, physical removal methods are mostly adopted in industries such as medium plates, shipbuilding, containers and the like.
In the container manufacturing industry, a steel shot blasting and sanding process is generally adopted in a pretreatment production link of hot rolled steel plate oxide skin removal. The process has long application and development history, mature process equipment and manufacturing technology, easy acquisition of production equipment and numerous suppliers. And has the advantages of high production efficiency and the like.
However, there are also a number of problems with the shot blasting process: high energy consumption, huge noise in the production process, huge consumption of consumables, more surface residues, easy deformation of the thin steel plate and the like.
Accordingly, there is a need for a method of treating hot rolled steel sheet for containers to at least partially solve the above problems.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the present application is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter.
To at least partially solve the above problems, the present application provides a method for treating a hot rolled steel sheet for a container, comprising the steps of:
the method comprises the following steps of (1) a scale breaking process, namely alternately bending and deforming a steel plate upwards and downwards along a treatment direction so as to enable oxide scales on the surface of the steel plate to be at least partially broken and separated from the surface of the steel plate;
a cleaning process, namely separating the residual attached oxide skin on the surface of the steel plate from the surface of the steel plate, and cleaning the oxide skin separated from the surface of the steel plate;
and a rolling process of rolling and cooling the steel plate and enabling the surface of the steel plate to have a preset roughness.
Optionally, the descaling process further comprises: the bending degree of the steel plate is controlled to be smaller than the elastic deformation range of the steel plate and larger than the elastic deformation range of the oxide scale.
Optionally, running the steel sheet through a scale breaking device to perform the scale breaking process, wherein the scale breaking device comprises a first set of rollers offset in a height direction and a second set of rollers, the first set of rollers comprising a plurality of first scale breaking rollers arranged in a treatment direction, the second set of rollers comprising a plurality of second scale breaking rollers arranged in the treatment direction, wherein the second scale breaking rollers are located at least partially in the gaps between adjacent first scale breaking rollers;
the scale breaking process further comprises the following steps: the degree of bending of the steel sheet is controlled by controlling a height difference between the first roller group and the second roller group.
Optionally, the cleaning process includes a first cleaning step, the first cleaning step including:
the steel plate is made to run through a cleaning roller with cleaning teeth, and the residual attached oxide scale on the surface of the steel plate is broken and separated by the impact of the cleaning teeth and the steel plate.
Optionally, the cleaning roller comprises a first main body roller and a planetary gear, wherein the planetary gear is rotatably arranged at the periphery of the first main body roller, and the cleaning teeth are arranged at the planetary gear;
the first cleaning step further comprises: the rotational speed of the first body roller is controlled so that a speed difference is formed between the linear speed of the outer periphery of the first body roller and the traveling speed of the steel sheet.
Optionally, the cleaning process further includes a second cleaning step located after the first cleaning step, the second cleaning step including:
the steel plate is made to run through an abrasive brush roller with an abrasive brush, and the oxide skin on the surface of the steel plate is removed by utilizing friction between the abrasive brush and the steel plate.
Optionally, the abrasive brush roll comprises a second main body roll and an abrasive sub-roll, wherein the abrasive sub-roll is rotatably arranged at the periphery of the second main body roll, and the abrasive brush is arranged at the abrasive sub-roll;
the second cleaning step further comprises: the rotational speed of the second main body roller is controlled so that a speed difference is formed between the linear speed of the outer periphery of the second main body roller and the traveling speed of the steel sheet.
Optionally, the rolling process includes a first rolling step, the first rolling step including:
the steel sheet is run through a first embossing roll such that the steel sheet is first cooled and has a first roughness.
Optionally, the rolling process includes a second rolling step located after the first rolling step, the second rolling step including:
the steel sheet is run through a second embossing roll such that the steel sheet is second cooled and has a second roughness different from the first roughness, wherein the second roughness is formed as the predetermined roughness.
Optionally, in the descaling process, the running speed of the steel plate is 40-70m/min; and/or
The operating speeds of the steel plates in the descaling process, the cleaning process and the rolling process are the same.
According to the method for treating the hot rolled steel plate for the container, the steel plate can be alternately bent and deformed upwards and downwards along the treatment direction, so that the oxide skin on the surface of the steel plate is at least partially broken and separated from the surface of the steel plate; the oxide skin can be effectively cleaned, and then the surface of the steel plate is subjected to rolling to obtain preset roughness, so that the production requirement is met.
Drawings
The following drawings of the present application are included to provide an understanding of the present application as part of the present application. The drawings illustrate embodiments of the present application and their description to explain the principles of the present application.
In the accompanying drawings:
FIG. 1 is a schematic flow chart of a treatment method of a hot rolled steel sheet for a container;
FIG. 2 is a schematic view showing a specific flow of a treatment method of a hot rolled steel sheet for a container;
FIG. 3 is a schematic view of a steel plate passing through a scale breaking device;
FIG. 4 is a schematic view of deformation of a steel sheet as it passes through a scale breaking device;
FIG. 5 is a schematic view of a steel plate passing through a cleaning device and an abrasive device;
FIG. 6 is a schematic view of the structure of an abrasive brush roll; and
fig. 7 is a schematic view of a structure in which a steel sheet passes through a rolling device.
Reference numerals illustrate:
10. first roller group of scale breaking device 11
12. First descaling roller 13 second roller set
14. Second descaling roller 20 cleaning device
21. Cleaning roller 22 first body roller
23. Planet wheel 23a cleaning tooth
30. Abrasive device 31 abrasive brush roll
32. Second main body roller 33 grinding sub roller
33a abrasive brush 40 rolling device
41. First roll-down assembly 42 second roll-down assembly
43. First embossing roller 44 second embossing roller
50. Steel sheet D1 treatment direction
D2 Height direction
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced without one or more of these details. In other instances, some features well known in the art have not been described in order to avoid obscuring the present application.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present application. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Ordinal words such as "first" and "second" recited in this application are merely identifying and do not have any other meaning, e.g., a particular order, etc. Also, for example, the term "first component" does not itself connote the presence of "second component" and the term "second component" does not itself connote the presence of "first component". It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are used herein for illustrative purposes only and are not limiting.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a method for treating a hot rolled steel sheet for a container may include the steps of:
1) And (3) a scale breaking process:
referring to fig. 3 and 4, the steel plate 50 is alternately bent and deformed upward and downward in the process direction D1 so that the scale on the surface of the steel plate 50 is at least partially broken and separated from the surface of the steel plate 50. It will be appreciated that the degree of bending of the steel plate 50 is controlled to be less than the elastic deformation range of the steel plate and greater than the elastic deformation range of the scale. Specifically, the steel sheet 50 is run through the scale breaking device 10 to perform a scale breaking process. The scale breaking device 10 may comprise a first roller set 11 and a second roller set 13, which are offset in the height direction D2. The first roller set 11 may include a plurality of first scale breaking rollers 12 arranged in the process direction D1, and the second roller set 13 may include a plurality of second scale breaking rollers 14 arranged in the process direction D1. It will be appreciated that in order to ensure an effective bending of the steel sheet 50, the second scale breaking rollers 14 are at least partially positioned in the gap of the first scale breaking rollers 12 adjacent in the process direction D1, and the degree of bending of the steel sheet 50 can be controlled by controlling the height difference between the first roller set 11 and the second roller set 13.
2) The cleaning process comprises the following steps:
the remaining scale on the surface of the steel sheet 50 is separated from the surface of the steel sheet 50, and the scale separated from the surface of the steel sheet 50 is removed. Referring back to fig. 2, the cleaning process may include a first cleaning step and a second cleaning step located after the first cleaning step.
The first cleaning step comprises:
the steel plate 50 is caused to run through the cleaning device 20, and the cleaning device 20 includes a cleaning roller 21 having cleaning teeth 23a, and the residual attached scale on the surface of the steel plate 50 is broken and detached by the impact of the cleaning teeth 23a with the steel plate 50. Specifically, referring to fig. 5, the cleaning device 20 may include a cleaning roller set, which may include two cleaning rollers 21 spaced apart in the height direction D2. Wherein the cleaning roller 21 may include a first body roller 22 and a planetary gear 23, the planetary gear 23 being rotatably provided at an outer circumference of the first body roller 22, the outer circumference of the planetary gear 23 being provided with uniform cleaning teeth 23a. By controlling the rotational speed of the first body roller 22 such that the linear velocity of the outer periphery of the first body roller 22 forms a velocity difference with the traveling velocity of the steel plate 50, it is understood that this operation may cause the cleaning teeth 23a on the planetary gear 23 to continuously rub against the surface of the steel plate 50, thereby cleaning the scale of the surface of the steel plate 50.
The second cleaning step comprises the following steps:
the steel sheet 50 is caused to run through the abrasive device 30, and the abrasive device 30 includes an abrasive brush roller 31 having an abrasive brush 33a, and the scale on the surface of the steel sheet 50 is removed by friction between the abrasive brush 33a and the steel sheet 50. Specifically, referring to fig. 5 and 6, the abrasive device 30 may include an abrasive roller set including two abrasive brush rollers 31 spaced apart in the height direction D2. Wherein the abrasive brush roller 31 may include a second main body roller 32 and an abrasive sub roller 33, the abrasive sub roller 33 being rotatably provided at an outer circumference of the second main body roller 32, the outer circumference of the abrasive sub roller 33 being provided with an abrasive brush 33a. The rotational speed of the second body roller 32 is controlled so that a speed difference is formed between the linear speed of the outer periphery of the second body roller 32 and the traveling speed of the steel sheet 50. It will be appreciated that this operation may cause the abrasive brushes 33a on the abrasive sub-rolls 33 to continuously rub against the surface of the steel sheet 50, thereby cleaning the surface of the steel sheet 50 of scale.
3) Rolling process
The steel sheet 50 is caused to run through the rolling device 40, thereby rolling-cooling the steel sheet 50, and causing the surface of the steel sheet 50 to have a predetermined roughness. The rolling process may include a first rolling step and a second rolling step located after the first rolling step.
Specifically, referring to FIG. 7, the rolling device 40 may include a first rolling assembly 41 and a second rolling assembly 42 spaced apart along the process direction D1. The first roll assembly 41 may include two first embossing rollers 43 spaced apart in the height direction D2 and the second roll assembly 42 may include two second embossing rollers 44 spaced apart in the height direction D2.
Wherein the first rolling step comprises:
the steel sheet 50 is run through the first embossing roll 43 such that the steel sheet 50 is first cooled and has a first roughness.
The second rolling step comprises the following steps:
the steel sheet 50 is run through the second embossing roll 44 such that the steel sheet 50 is second-cooled and has a second roughness different from the first roughness, wherein the second roughness is formed as the aforementioned predetermined roughness.
In summary, the main component of the oxide skin of the hot rolled steel plate for the container is ferroferric oxide, and the hot rolled steel plate has the characteristics of high hardness and low ductility. The scale breaking process causes the steel plate to be compressed and stretched alternately, so that the oxide scale on the surface of the steel plate is cracked, and most of the oxide scale is separated from the steel plate and falls off. The following cleaning process, the planetary gear 23 and the abrasive sub-roller 33 can form a speed difference with the traveling speed of the steel plate, thereby forming impact and friction on the scale remaining on the surface of the steel plate, so that the scale is thoroughly separated from the steel plate. And the abrasive brush roller 31 can effectively clean the scale on the surface of the steel plate. Finally, the steel sheet 50 is run through the rolling device 40, thereby rolling the cooled steel sheet 50 and imparting a predetermined roughness to the surface of the steel sheet 50. In the process of descaling, the running speed of the steel plate 50 is controlled to be 40-70m/min because the extension of the steel plate 50 is in direct proportion to the descaling effect and the electric energy consumption; for example 40m/min, 45m/min, 50m/min, 55m/min, 60m/min, 65m/min, 70m/min. Accordingly, the operation speed of the steel plate 50 in the subsequent cleaning process and rolling process may be the same as that in the foregoing descaling process.
The processes, steps described in all the preferred embodiments described above are examples only. Unless adverse effects occur, various processing operations may be performed in an order different from that of the above-described flow. The step sequence of the above-mentioned flow can also be added, combined or deleted according to the actual requirement.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the present application. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.
While the application has been described by way of example and with reference to the above embodiments, it is to be understood that the above embodiments are for illustration and description only and that the application is not limited to the above embodiments, and that many variations and modifications may be made in accordance with the teachings of the application, which variations and modifications are within the scope of the application as claimed.
Claims (10)
1. A method for processing a hot rolled steel plate for a container is characterized by comprising the following steps:
the method comprises the following steps of (1) a scale breaking process, namely alternately bending and deforming a steel plate upwards and downwards along a treatment direction so as to enable oxide scales on the surface of the steel plate to be at least partially broken and separated from the surface of the steel plate;
a cleaning process, namely separating the residual attached oxide skin on the surface of the steel plate from the surface of the steel plate, and cleaning the oxide skin separated from the surface of the steel plate;
and a rolling process of rolling and cooling the steel plate and enabling the surface of the steel plate to have a preset roughness.
2. The method of treating a hot rolled steel sheet for a container as claimed in claim 1 wherein said descaling process further comprises: the bending degree of the steel plate is controlled to be smaller than the elastic deformation range of the steel plate and larger than the elastic deformation range of the oxide scale.
3. The method of treating a hot rolled steel sheet for a container as claimed in claim 2 wherein said steel sheet is run through a descaling device to perform said descaling process, wherein said descaling device comprises a first set of rolls offset in a height direction and a second set of rolls, said first set of rolls comprising a plurality of said first descaling rolls aligned in a treatment direction, said second set of rolls comprising a plurality of second descaling rolls aligned in said treatment direction, wherein said second descaling rolls are at least partially located in the gap between adjacent said first descaling rolls;
the scale breaking process further comprises the following steps: the degree of bending of the steel sheet is controlled by controlling a height difference between the first roller set and the second roller set.
4. The method of treating a hot rolled steel sheet for a container as claimed in claim 1 wherein the cleaning process includes a first cleaning step including:
the steel plate is made to run through a cleaning roller with cleaning teeth, and the residual attached oxide scale on the surface of the steel plate is broken and separated by the impact of the cleaning teeth and the steel plate.
5. The method of treating a hot rolled steel sheet for a container as claimed in claim 4 wherein the cleaning roller comprises a first body roller and a planetary gear, wherein the planetary gear is rotatably provided at an outer periphery of the first body roller, and the cleaning teeth are provided at the planetary gear;
the first cleaning step further comprises: the rotational speed of the first body roller is controlled so that a speed difference is formed between the linear speed of the outer periphery of the first body roller and the traveling speed of the steel sheet.
6. The method of treating a hot rolled steel sheet for a container as claimed in claim 4 wherein said cleaning process further comprises a second cleaning step after said first cleaning step, said second cleaning step comprising:
the steel plate is made to run through an abrasive brush roller with an abrasive brush, and the oxide skin on the surface of the steel plate is removed by utilizing friction between the abrasive brush and the steel plate.
7. The method for treating a hot rolled steel sheet for a container as claimed in claim 6 wherein the abrasive brush roller comprises a second main body roller and an abrasive sub roller, wherein the abrasive sub roller is rotatably provided at an outer circumference of the second main body roller, and the abrasive brush is provided at the abrasive sub roller;
the second cleaning step further comprises: the rotational speed of the second main body roller is controlled so that a speed difference is formed between the linear speed of the outer periphery of the second main body roller and the traveling speed of the steel sheet.
8. The method of treating a hot rolled steel sheet for a container as claimed in claim 1 wherein the rolling process includes a first rolling step including:
the steel sheet is run through a first embossing roll such that the steel sheet is first cooled and has a first roughness.
9. The method of treating a hot rolled steel sheet for a container as claimed in claim 8 wherein the rolling process includes a second rolling step after the first rolling step, the second rolling step including:
the steel sheet is run through a second embossing roll such that the steel sheet is second cooled and has a second roughness different from the first roughness, wherein the second roughness is formed as the predetermined roughness.
10. A method for treating a hot rolled steel sheet for a container as claimed in any one of claims 1 to 9,
in the process of descaling, the running speed of the steel plate is 40-70m/min; and/or
The operating speeds of the steel plates in the descaling process, the cleaning process and the rolling process are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311550658.5A CN117680498A (en) | 2023-11-20 | 2023-11-20 | Treatment method of hot rolled steel plate for container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311550658.5A CN117680498A (en) | 2023-11-20 | 2023-11-20 | Treatment method of hot rolled steel plate for container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117680498A true CN117680498A (en) | 2024-03-12 |
Family
ID=90125466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311550658.5A Pending CN117680498A (en) | 2023-11-20 | 2023-11-20 | Treatment method of hot rolled steel plate for container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117680498A (en) |
-
2023
- 2023-11-20 CN CN202311550658.5A patent/CN117680498A/en active Pending
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