A method for rolling bundled steel strips by a single-stand six-high rolling mill, and bundled steel strips

Abstract

The present application provides a method for rolling strip steel using a single-stand six-roll mill and the strip steel, wherein the method includes: S1, preparing the rolling conditions: controlling the surface roughness of the working roll after grinding to be between 0.3μm-0.4μm, controlling the diameter of the working roll to be between 340mm-360mm, and controlling the concentration of the emulsion in the rolling lubrication system to be between 3.0%-3.5%; S2, setting the preset starting rolling force: setting the preset starting rolling force to 1380KN; S3, executing the rolling of the strip steel: in the process of rolling the strip steel, adjusting the pass reduction rate to be between 12%-14%, and controlling the rolling tension of the single-stand six-roll mill to be 137KN, so as to roll the rolling raw material into the target strip steel. The technical solution proposed in the present application can solve the technical problems of overload of rolling force and large thickness error when a single-stand six-roll mill rolls high-tensile strength strip steel, and realize the stable production of high-tensile strength strip steel rolled by a single-stand six-roll mill.

Description

Technical Field

[0001] The present application relates to the technical field of cold-rolled strip steel processing, and in particular to a method for rolling bundled strip steel using a single-stand six-high rolling mill, and the bundled strip steel. Background Art

[0002] At present, in order to ensure that the steel strips used for packaging and bundling of steel, nonferrous metals, textile products, building materials, etc. have high tensile strength, it is necessary to change the method of rolling the steel strips using a single-stand six-high rolling mill.

[0003] In the existing technology, under the production requirements of wide strip steel and large pressure, the base plate has high tensile strength and is difficult to deform. During the rolling process of a single-stand six-roll mill, there are problems such as excessive rolling force load, excessive thickness, and abnormal plate shape that affect the rolling stability and quality of the strapping steel. The production efficiency is low, and the strapping steel does not meet customer needs.

[0004] It can be seen that ensuring that the single-stand six-high rolling mill can roll the bundled steel with high efficiency and high quality so that the bundled steel has high tensile strength is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The purpose of this application is to provide a method for rolling bundled steel with a single-stand six-roll rolling mill, and bundled steel, which can solve the technical problems of rolling force overload and large thickness error when rolling high-tensile strength bundled steel with a single-stand six-roll rolling mill, thereby realizing stable production of high-tensile strength bundled steel with a single-stand six-roll rolling mill.

[0006] Specifically, this application adopts the following technical solutions:

[0007] According to the first aspect of the embodiment of the present application, a method for rolling bundled steel by a single-stand six-roll mill is provided, the method comprising: S1, preparing the rolling condition: controlling the surface roughness of the working roll after grinding to be between 0.3μm-0.4μm, controlling the diameter of the working roll to be between 340mm-360mm, and controlling the concentration of the emulsion in the rolling lubrication system to be between 3.0%-3.5%; S2, setting the preset starting rolling force: setting the preset starting rolling force to 1380KN; S3, executing the rolling of bundled steel: in the process of rolling the bundled steel, adjusting the pass reduction rate to be between 12%-14%, and controlling the rolling tension of the single-stand six-roll mill to be 137KN, so as to roll the rolling raw material into the target bundled steel.

[0008] In some embodiments of the present application, based on the aforementioned solution, the single-stand six-high rolling mill is a single-stand six-high 1420 rolling mill.

[0009] In some embodiments of the present application, based on the aforementioned solution, the target strip steel is 930KD strip steel.

[0010] In some embodiments of the present application, based on the aforementioned solution, during the process of rolling the bundled steel strip, the speed of the single-stand six-high rolling mill for rolling the bundled steel strip is ≥800 m / min.

[0011] In some embodiments of the present application, based on the aforementioned solution, during the rolling of bundled steel strips, the rolling load of the single-stand six-high rolling mill is ≤1470KN.

[0012] In some embodiments of the present application, based on the aforementioned solution, the tensile strength of the target strip steel rolled by the single-stand six-high rolling mill is greater than 1000 MPa.

[0013] In some embodiments of the present application, based on the aforementioned solution, the target thickness of the bundled steel strip rolled by the single-stand six-high rolling mill is 0.91 mm.

[0014] In some embodiments of the present application, based on the aforementioned solution, the thickness difference of the target strip steel rolled by the single-stand six-high rolling mill is ≤10 μm.

[0015] In some embodiments of the present application, based on the aforementioned solution, the rolling raw material includes a steel strip with a thickness of 3.2 mm and a width of 1215 mm.

[0016] According to a second aspect of the embodiment of the present application, a steel strip is provided, which is rolled using the method of rolling steel strips using a single-stand six-roll mill as described in the first aspect of the embodiment of the present application.

[0017] It can be seen from the above technical solutions that this application has at least the following advantages and positive effects:

[0018] First, in the existing technical solutions, a single-stand six-high rolling mill can only produce low-strength plate and strip steel, while the method for rolling strip steel with a single-stand six-high rolling mill proposed in this application can enable the single-stand six-high rolling mill to roll high-tensile-strength strip steel.

[0019] Secondly, after many tests and adjustments, the rolling process parameters proposed in the above-mentioned single-stand six-high rolling mill for rolling bundled strip steel are within the optimal parameter range.

[0020] Thirdly, the solution of rolling bundled steel with a single-stand six-roll mill proposed in this application can enable the unit that originally produces bundled steel with a tensile strength of 400 MPa-500 MPa to stably and quickly produce bundled steel with a tensile strength of >1000 MPa. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly presented. It should be understood by those skilled in the art that these specific embodiments and examples are intended to illustrate the present invention, not to limit the present invention.

[0022] Throughout this specification, unless otherwise specified, the terms used herein should be understood as having the meaning commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. In the event of any conflict, the present specification shall take precedence.

[0023] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0024] According to a typical embodiment of the present application, a method for rolling bundled steel strips on a single-stand six-high rolling mill is provided, the method comprising:

[0025] S1, rolling condition preparation: control the surface roughness of the working roll after grinding to be between 0.3μm-0.4μm, control the working roll diameter to be between 340mm-360mm, and control the emulsion concentration in the rolling lubrication system to be between 3.0%-3.5%.

[0026] S2, set the preset acceleration rolling force: set the preset acceleration rolling force to 1380KN.

[0027] S3, executing strip rolling: in the process of rolling the strip, adjusting the pass reduction rate between 12% and 14%, controlling the rolling tension of the single-stand six-high rolling mill to be 137KN, so as to roll the raw material into the target strip.

[0028] In the present application, the single-stand six-high rolling mill used in the method can be a single-stand six-high 1420 rolling mill. Through changes and innovations in production technology, the single-stand six-high 1420 rolling mill can produce high-tensile strength bundled steel.

[0029] In the present application, the target bundled steel strip produced by the method is 930KD bundled steel strip.

[0030] In the present application, when rolling the bundled steel strip using this method, the speed of the single-stand six-high rolling mill for rolling the bundled steel strip is ≥800m / min, thereby greatly improving the production efficiency of the bundled steel strip.

[0031] In the present application, when rolling bundled steel strips using this method, the rolling load of the single-stand six-high rolling mill is ≤1470KN, which solves the problem of rolling force overload when rolling bundled steel strips using the single-stand six-high rolling mill.

[0032] In the present application, the tensile strength of the target strip steel rolled by the single-stand six-high rolling mill is >1000 MPa, which can meet the requirement for high compressive strength of the strip steel.

[0033] In the present application, the target thickness of the bundled steel strip rolled by the single-stand six-high rolling mill is 0.91 mm.

[0034] In the present application, the thickness difference of the target strip steel rolled by the single-stand six-high rolling mill is ≤10um, and the thickness accuracy of the strip steel is high.

[0035] In the present application, the rolling raw material includes strip steel with a thickness of 3.2 mm and a width of 1215 mm, and the rolling raw material is easily available.

[0036] The present application also proposes a bundled steel strip, which is rolled by the method of rolling bundled steel by a single-stand six-high rolling mill as described above.

[0037] The following will describe in detail the method of rolling bundled strip steel using a single-stand six-high rolling mill of the present application in combination with embodiments and experimental data.

[0038] Example 1

[0039] Rolling condition preparation: the surface roughness of the working roll after grinding is controlled to be 0.33 μm, the diameter of the working roll is controlled to be 355 mm, and the concentration of the emulsion in the rolling lubrication system is controlled to be 3.4%.

[0040] Set the preset starting rolling force: Set the preset starting rolling force to 1380KN.

[0041] Execute rolling of bundled strip steel: During the process of rolling bundled strip steel, the pass reduction rate is adjusted to 12%, and the rolling tension of the single-stand six-high rolling mill is controlled to 137KN to roll the rolling raw material into the target bundled strip steel.

[0042] In the above-mentioned embodiment 1, the maximum rolling force during the strip steel rolling process is 1410KN, the thickness fluctuation is ≤5um, the speed is ≥800m / min, the wide strip steel tensile strength is 1050mpa, and the quality and performance of the strip steel are qualified.

[0043] Example 2

[0044] Rolling condition preparation: the surface roughness of the working roll after grinding is controlled to be 0.36 μm, the diameter of the working roll is controlled to be 357 mm, and the concentration of the emulsion in the rolling lubrication system is controlled to be 3.2%.

[0045] Set the preset starting rolling force: Set the preset starting rolling force to 1380KN.

[0046] Execute rolling of bundled strip steel: During the process of rolling the bundled strip steel, the pass reduction rate is adjusted to 13.5%, and the rolling tension of the single-stand six-high rolling mill is controlled to 137KN to roll the rolling raw material into the target bundled strip steel.

[0047] In the above-mentioned embodiment 1, the maximum rolling force during the strip steel rolling process is 1430 KN, the thickness fluctuation is ≤7 μm, the speed is ≥800 m / min, the wide strip steel tensile strength is 1050 MPa, and the quality and performance of the strip steel are qualified.

[0048] In the above-mentioned Example 1 and Example 2, the raw materials used are raw steel plates with a thickness of 3.2 mm and a width of 1215 mm.

[0049] It can be seen from the above technical solution that this application has at least the following advantages and positive effects:

[0050] First, in the existing technical solutions, a single-stand six-high rolling mill can only produce low-strength plate and strip steel, while the method for rolling strip steel with a single-stand six-high rolling mill proposed in this application can enable the single-stand six-high rolling mill to roll high-tensile-strength strip steel.

[0051] Secondly, after many tests and adjustments, the rolling process parameters proposed in the above-mentioned single-stand six-high rolling mill for rolling bundled strip steel are within the optimal parameter range.

[0052] Thirdly, the solution of rolling bundled steel with a single-stand six-roll mill proposed in this application can enable the unit that originally produces bundled steel with a tensile strength of 400 MPa-500 MPa to stably and quickly produce bundled steel with a tensile strength of >1000 MPa.

[0053] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present application can be embodied in various forms without departing from the spirit or substance of the application, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, and all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A method for rolling bundled steel strips using a single-stand six-high rolling mill, characterized in that: The method comprises: S1, rolling condition preparation: control the surface roughness of the work roll after grinding to between 0.3μm-0.4μm, control the diameter of the work roll to between 340mm-360mm, and control the emulsion concentration in the rolling lubrication system to between 3.0%-3.5%; S2, set the preset acceleration rolling force: set the preset acceleration rolling force to 1380KN; S3, executing strip rolling: During the strip rolling process, the pass reduction rate is adjusted to between 12% and 14%, and the rolling tension of the single-stand six-high rolling mill is controlled to be 137 kN, so as to roll the raw material into the target strip; During the process of rolling the bundled steel strip, the speed of the single-stand six-high rolling mill for rolling the bundled steel strip is ≥800m / min, and the rolling load of the single-stand six-high rolling mill is ≤1470KN.

2. The method according to claim 1, characterized in that The single-stand six-high rolling mill is a single-stand six-high 1420 rolling mill.

3. The method according to claim 1, characterized in that The target strip steel is 930KD strip steel.

4. The method according to claim 1, wherein The tensile strength of the target strip steel rolled by the single-stand six-high rolling mill is greater than 1000 MPa.

5. The method according to claim 1, wherein The target thickness of the bundled steel strip rolled by the single-stand six-high rolling mill is 0.91 mm.

6. The method according to claim 1, characterized in that The thickness difference of the target bundled steel strip rolled by the single-stand six-high rolling mill is ≤10um.

7. The method according to claim 1, characterized in that The rolling raw material includes a steel strip with a thickness of 3.2 mm and a width of 1215 mm.

8. A steel strapping, characterized in that: The steel strip is rolled by using the method for rolling the steel strip using a single-stand six-high rolling mill as described in any one of claims 1 to 7.