CN115625200A - Continuous coiling and rolling system and process for magnesium and magnesium alloy sheet/foil coiled material - Google Patents
Continuous coiling and rolling system and process for magnesium and magnesium alloy sheet/foil coiled material Download PDFInfo
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- CN115625200A CN115625200A CN202211290053.2A CN202211290053A CN115625200A CN 115625200 A CN115625200 A CN 115625200A CN 202211290053 A CN202211290053 A CN 202211290053A CN 115625200 A CN115625200 A CN 115625200A
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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
- 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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/08—Lubricating, cooling or heating rolls internally
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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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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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
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
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- 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
- B21B45/004—Heating the product
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- 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/08—Lubricating, cooling or heating rolls internally
- B21B2027/083—Lubricating, cooling or heating rolls internally cooling internally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/08—Lubricating, cooling or heating rolls internally
- B21B2027/086—Lubricating, cooling or heating rolls internally heating internally
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Abstract
The invention provides a continuous coiling and rolling system of magnesium and magnesium alloy sheet/foil coiled materials, which comprises a first temperature control coiling roller, a first temperature control tension roller, a temperature control working roller, a second temperature control tension roller, a second temperature control coiling roller and supporting rollers positioned at two sides of the temperature control working roller, wherein the first temperature control coiling roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control coiling roller are sequentially arranged; the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are cold and hot dual-purpose rollers, and the cold and hot dual-purpose rollers comprise a heating system and a cooling system; based on the continuous coiling rolling system, in the rolling process, different cold and hot combinations can be carried out on the coiling roller, the tension roller and the working roller according to the material characteristics of the magnesium alloy material, the temperature of the coiling roller, the tension roller and the working roller is controlled, and the magnesium alloy material is continuously coiled and rolled for multiple times until the target thickness is achieved. The invention can realize continuous rolling of magnesium and magnesium alloy sheet/foil coiled materials, ensure the stability of product quality and improve the production efficiency.
Description
Technical Field
The invention relates to the technical field of magnesium and magnesium alloy rolling, in particular to a continuous coiling and rolling system and a rolling process for magnesium and magnesium alloy sheet/foil coiled materials.
Background
The magnesium alloy is used as a metal structure material with the lightest mass in the current practical application, has small specific gravity and obvious lightweight effect, is gradually applied to the fields of aerospace, national defense and military industry, automobiles, 3C electronic products and the like in a few years, and has different requirements on the magnesium alloy in different fields. At present, wrought magnesium alloy products produced by processes such as extrusion, forging, rolling and the like gradually replace traditional cast magnesium alloys due to higher strength, better ductility and more excellent mechanical properties. The rolling is used as an efficient and low-cost plastic forming method in the industrial production of magnesium alloys, and can play a role in refining grains, improving tissues and obviously improving the mechanical properties of the alloys. In recent years, coiling rolling has begun to be taken into consideration in place of the production mode of single-piece rolling in order to meet the customer demand, and has achieved significant advantages in coiling technology. The coiling rolling has the advantages that:
(1) The stability and the plate shape control in the rolling process are facilitated during the rolling process with the tension;
(2) The contact surface of the strip and the air is reduced, the temperature is not quickly reduced, and the oxidation can be avoided;
(3) The butt welding of the head and the tail is facilitated, and the continuous rolling is easy to realize;
(4) Is beneficial to the treatment in the heat treatment process.
However, the current magnesium alloy plate rolling technology is still immature, the rolled plate has high anisotropy, poor stamping formability, severe edge cracking and low material utilization rate, and the application of the magnesium alloy plate is greatly limited, particularly the rolling of magnesium alloy sheets and foil coils (less than 0.1 mm) of which the thickness is 1mm or less.
In order to solve the bottleneck problems of difficult preparation, low production efficiency, product quality and the like of magnesium alloy sheet/foil coiled materials, the current magnesium alloy sheet/foil coiled material rolling method can be divided into two types. The first type is a blank or roller heating mode, which utilizes the characteristic that magnesium alloy presents better plasticity at a certain temperature, such as a rolling mode combining blank heating and cold roller rolling, or a rolling device is modified, and rolling is carried out in a hot roller mode by heating the inside or the outside of a roller. However, the thickness of the thin plate/foil is less than 1mm, and the thin plate/foil is influenced by air convection and heat conduction due to contact with a roller, so that the temperature of the plate is difficult to accurately control in the rolling process, and the temperature distribution is uneven, so that the deformation is uneven, and the wave is easy to appear; and the blank is locally softened, is easily torn under the action of tension during rolling, is easily oxidized on the surface, and seriously influences the production efficiency, the yield and the quality stability. The other method is a cold rolling, cold blank and intermediate annealing method, but the production efficiency of the rolling mode of rolling to a certain deformation and then performing the furnace return annealing is extremely low, and during the furnace return annealing, the surface oxidation is easy to occur when the thin plate strip is contacted with hot air, and the temperature is not uniform. Therefore, a continuous rolling process for magnesium and magnesium alloy sheet/foil coils is needed to be provided, so as to solve the problems of difficult preparation, poor surface quality and dimensional accuracy and low production efficiency of the existing magnesium and magnesium alloy sheet/foil coils.
Disclosure of Invention
In order to solve the technical problems, the invention provides a continuous coiling and rolling system and a rolling process for magnesium and magnesium alloy sheet/foil coiled materials, which can solve the problems of difficult preparation, poor surface quality and dimensional accuracy and low production efficiency of the magnesium and magnesium alloy sheet/foil coiled materials, realize continuous rolling of the magnesium and magnesium alloy sheet/foil coiled materials, ensure the quality stability of products and improve the production efficiency.
The invention adopts the following technical scheme:
the invention provides a continuous coiling and rolling system of magnesium and magnesium alloy sheet/foil coiled materials, which comprises a first temperature control coiling roller, a first temperature control tension roller, a temperature control working roller, a second temperature control tension roller, a second temperature control coiling roller and supporting rollers positioned at two sides of the temperature control working roller, wherein the first temperature control coiling roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control coiling roller are sequentially arranged;
one side or two sides of the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are provided with temperature sensors;
the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are cold and hot dual-purpose rollers, and the cold and hot dual-purpose rollers comprise a heating system and a cooling system;
and the heating system, the cooling system and the temperature sensor of the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are all connected with the temperature control system.
In above-mentioned technical scheme, first accuse temperature batch roller, first accuse temperature tension roll, accuse temperature work roll, second accuse temperature tension roll and second accuse temperature batch roller are cold and hot double-purpose roller, just cold and hot double-purpose roller includes heating system and cooling system, and concrete accessible sets up heating rod and cooling water hole along the axial in the roll and realizes.
Furthermore, heat preservation covers are arranged outside the first temperature control winding roller and the second temperature control winding roller.
In the above technical scheme, when the first temperature-control winding roller and the second temperature-control winding roller are hot winding rollers, a heat-preservation cover is usually required to be arranged to avoid temperature loss, or a heating cover can be arranged to ensure temperature stability.
Further, the temperature control working roll is a reversible rolling mill working roll.
In addition, based on the continuous coiling and rolling system, the invention also provides a continuous coiling and rolling process of the magnesium and magnesium alloy sheet/foil coiled material, which comprises the following steps:
(1) Determining the species characteristics of magnesium and magnesium alloy, and determining the cold and hot combination mode of a first/second temperature control winding roller, a first/second temperature control tension roller and a temperature control working roller according to the room temperature plasticity of the magnesium alloy material;
(2) The method comprises the following steps of (1) coiling a magnesium or magnesium alloy coiled material onto a first temperature-control coiling roller, uncoiling the coiled material, adjusting the trend of the uncoiled plate strip by a first temperature-control tension roller to enable the plate strip to horizontally enter a temperature-control working roller for one-time rolling, adjusting the trend of the plate strip by a second temperature-control tension roller after one-time rolling, and coiling the plate strip onto a second temperature-control coiling roller;
(3) Adjusting the reversible rolling mill to work reversely, so that the coiled material on the second temperature-control coiling roller sequentially passes through the second temperature-control tension roller and the temperature-control working roller to be rolled for two times, and the strip is adjusted by the first temperature-control tension roller after being rolled for two times to be coiled on the first temperature-control coiling roller;
and (4) repeating the steps (1) to (3) to perform multi-pass continuous coiling rolling until the magnesium or magnesium alloy sheet/foil coiled material with the target thickness is obtained, and specifically obtaining the magnesium or magnesium alloy sheet/foil coiled material with the thickness of 0.01-1.0mm.
Further, the cold and hot combination mode of the first/second temperature control winding roller, the first/second temperature control tension roller and the temperature control working roller in the step (1) comprises: a hot coiling roller, a cold tension roller, a cold working roller, a hot coiling roller, a hot tension roller, a cold working roller, a cold coiling roller, a cold tension roller, a cold working roller, a hot coiling roller, a hot Zhang Wengun, a hot working roller, a cold coiling roller, a hot working roller, a hot coiling roller, a cold tension roller, a hot working roller, a cold coiling roller, a cold tension roller and a hot working roller; preferably, a combination mode of a hot coiling roller, a cold tension roller, a cold working roller, a hot coiling roller, a hot tension roller, a cold working roller, a cold coiling roller, a hot tension roller, a cold working roller, a hot coiling roller, a hot tension roller and a hot working roller is adopted.
Further, in the step (1), when the magnesium alloy material has good plasticity, the cold and hot combination mode of the first/second temperature control winding rollers, the first/second temperature control tension rollers and the temperature control working roller is selected from a hot winding roller, a cold tension roller and a cold working roller or a cold winding roller, a hot tension roller and a cold working roller; for the cold and hot combination mode of the hot winding roller, the cold tension roller and the cold working roller, the temperature of the first/second temperature control winding roller is controlled to be 100-150 ℃, the temperature of the first/second temperature control tension roller is controlled to be 20-25 ℃, and the temperature of the temperature control working roller is controlled to be 20-25 ℃ in the rolling process; for the cold and hot combination mode of the cold winding roller, the hot tension roller and the cold working roller, the temperature of the first/second temperature control winding roller is controlled to be 20-25 ℃, the temperature of the first/second temperature control tension roller is controlled to be 100-150 ℃ and the temperature of the temperature control working roller is controlled to be 20-25 ℃ in the rolling process;
when the magnesium alloy material has medium plasticity, the cold and hot combination mode of the first/second temperature control winding rollers, the first/second temperature control tension rollers and the temperature control working roller is selected from a hot winding roller, a hot tension roller and a cold working roller; for the cold and hot combination mode of the hot winding roller, the hot tension roller and the cold working roller, the temperature of the first/second temperature control winding roller is controlled to be 150-200 ℃, the temperature of the first/second temperature control tension roller is controlled to be 150-200 ℃ and the temperature of the temperature control working roller is controlled to be 20-25 ℃ in the rolling process;
when the magnesium alloy material has poor plasticity, the cold and hot combination mode of the first/second temperature control winding rollers, the first/second temperature control tension rollers and the temperature control working roller is selected from a hot winding roller, a hot tension roller and a hot working roller; for the cold and hot combination mode of the hot winding roller, the hot tension roller and the hot working roller, the temperature of the first/second temperature control winding roller is controlled to be 200-250 ℃, the temperature of the first/second temperature control tension roller is controlled to be 200-250 ℃ and the temperature of the temperature control working roller is controlled to be 200-250 ℃ in the rolling process.
In the technical scheme, for the magnesium alloy material with good plasticity (the room temperature elongation is more than 20%), when a hot coiling roller, a cold tension roller, a cold working roller or a cold coiling roller, a hot tension roller and a cold working roller are adopted, the hot coiling roller or the hot tension roller can lead the magnesium alloy material to realize online stress relief and static recrystallization annealing softening and grain refinement, then cold rolling is carried out again to lead the thickness of the material to be reduced, after rolling is finished, the hot coiling roller or the hot tension roller can be used for online stress relief annealing and static recrystallization grain refinement again to avoid grain growth, and the repeated rolling can ensure good surface quality and dimensional precision of the magnesium alloy and obtain a magnesium alloy sheet/foil coiled material with fine grain structure and excellent mechanical property;
for magnesium alloy materials with medium plasticity (the elongation percentage at room temperature is 10-20%), when a cold-hot combination mode of a hot coiling roller, a hot tension roller and a cold working roller is adopted for rolling, the magnesium alloy enters the hot tension roller through the hot coiling roller, the materials are heated to a certain temperature through heat conduction, then the materials enter the cold working roller, cold rolling is carried out to deform and thin the magnesium alloy materials, then the materials are heated through the hot coiling roller and the hot tension roller again, so that crystal grains are statically recrystallized to refine the crystal grains, and the mechanical property of the magnesium alloy materials is improved;
for the magnesium alloy material with poor plasticity (the room temperature elongation is less than 10%), when the cold and hot combination mode of a hot winding roller, a hot tension roller and a hot working roller is adopted for rolling, the hot winding roller leads the magnesium alloy material to realize online stress relief and static recrystallization annealing softening and grain refinement, the plastic deformation capability in the plate rolling process is further improved through the heating of the hot tension roller and the hot working roller, and finally the hot rolling is carried out to lead the plate to reach the expected thickness and mechanical property requirements.
Further, in the step (1), for the magnesium alloy having good plasticity, when the hot take-up roll + hot tension roll + cold work roll or the hot take-up roll + cold tension roll + cold work roll is selected, the first/second take-up roll temperature T = T is set 0 +10 ℃ wherein, T 0 The recrystallization temperature of the magnesium alloy material is delta h cold rolling deformation and the recrystallization temperature of the magnesium alloy material at the time t = L/2v, t is the time of the magnesium alloy plate strip with the effective length passing through the working roll, L is the effective length of the magnesium alloy plate strip passing through the working roll, and v is the linear velocity of the magnesium alloy plate strip in the rolling process.
Further, in the rolling process in the step (2), the magnesium alloy material is heated or cooled by the first/second temperature control take-up rolls, the first/second temperature control tension rolls and the temperature control working rolls in a surface contact heat conduction mode.
Further, the thickness of the magnesium and magnesium alloy material before rolling is 0.1-5 mm, and the thickness of the magnesium and magnesium alloy material after rolling is 0.01-1.0mm.
The invention has the beneficial effects that:
(1) The invention provides a continuous coiling and rolling system of magnesium and magnesium alloy sheet/foil coiled materials, which comprises a temperature control coiling roller, a temperature control tension roller and a temperature control working roller, wherein the temperature control coiling roller, the temperature control tension roller and the temperature control working roller are cold and hot dual-purpose rollers, the cold and hot are adjustable, the temperature is controllable, and different cold and hot combinations can be selected for rolling according to the type characteristics and the like of magnesium alloy materials; in addition, the magnesium alloy material is directly heated or cooled through each roller, namely, heat or cold is transferred to the magnesium alloy sheet material contacted with the roller in a contact heat conduction mode to heat or cool the magnesium alloy sheet material to a specific temperature, so that the rolling is ensured to be carried out smoothly, the surface quality, the dimensional precision and the mechanical property of the sheet foil material can be improved, heating modes such as a resistance furnace and hot air are not required to be arranged, and the phenomenon of magnesium alloy surface oxidation caused by the contact of hot air and a plate strip brought by the heating modes such as the resistance furnace is avoided;
(2) The invention also provides a rolling process based on the continuous rolling system, different cold and hot combinations can be selected for rolling according to the characteristics of different types of magnesium alloys, continuous coiling rolling is realized, and the production efficiency is high; meanwhile, the cold and hot combination of the winding roller, the tension roller and the working roller can realize the free combination of cold deformation, thermal deformation, static recrystallization and dynamic recrystallization, thereby obtaining the magnesium alloy sheet/foil coiled material with high surface quality and excellent mechanical property; and the thickness of the obtained magnesium alloy sheet/foil coiled material can reach 0.01-1.0mm.
Drawings
FIG. 1 is a schematic view of the continuous coil rolling system of the present invention;
FIG. 2 is a schematic structural diagram of a dual-purpose cold and hot roll according to the present invention;
FIG. 3 is a metallographic graph of a rolled Mg-Zn-RE magnesium alloy coil stock obtained in example 1;
FIG. 4 is a metallographic image of a rolled AZ31 magnesium alloy coil material obtained by rolling in example 2;
the figure is marked with: 1. a first temperature-controlled take-up roll; 2. a first temperature-controlled tension roller; 3. a temperature control working roll; 4. a second temperature control tension roller; 5. a second temperature-controlled take-up roll; 6. a support roller; 7. a temperature sensor; 8. a temperature control system; 9. a heat-preserving cover; 10. a heating channel; 11. a cooling water passage.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
referring to fig. 1 and fig. 2, the invention provides a continuous coiling and rolling system for magnesium and magnesium alloy sheet/foil coiled materials, which comprises a first temperature control coiling roller 1, a first temperature control tension roller 2, a temperature control working roller 3, a second temperature control tension roller 4, a second temperature control coiling roller 5 and support rollers 6 positioned at two sides of the temperature control working roller 3, wherein the first temperature control coiling roller and the second temperature control coiling roller are sequentially arranged, and each of the first temperature control coiling roller and the second temperature control coiling roller is composed of 3 tension rollers so as to control the trend and stress of a magnesium alloy sheet; in addition, the first temperature control winding roller 1, the first temperature control tension roller 2, the temperature control working roller 3, the second temperature control tension roller 4 and the second temperature control winding roller 5 are all reversible rollers and can rotate forwards and backwards.
One side or two sides of the first temperature-control winding roller 1, the first temperature-control tension roller 2, the temperature-control working roller 3, the second temperature-control tension roller 4 and the second temperature-control winding roller 5 are provided with temperature sensors 7, and specifically, the temperature sensors can be arranged on the front sides of the first temperature-control winding roller 1 and the first temperature-control tension roller 2, the rear sides of the second temperature-control tension roller 4 and the second temperature-control winding roller 5, and the front side and the rear side of the temperature-control working roller 3;
in addition, the first temperature control winding roller 1, the first temperature control tension roller 2, the temperature control working roller 3, the second temperature control tension roller 4 and the second temperature control winding roller 5 are cold and hot dual-purpose rollers, each cold and hot dual-purpose roller comprises a heating system and a cooling system, specifically, a heating channel 10 can be arranged in the center of each roller along the axial direction of the roller, and a plurality of cooling water channels 11 along the axial direction are arranged on the roller in the radial direction and around the outer ring of the heating channel; wherein, heating rod can be set up in heating channel 10 and heat, and cooling water channel 11 connects the condenser tube and cools off.
The continuous coiling and rolling system further comprises a temperature control system 8, and the first temperature control coiling roller 1, the first temperature control tension roller 2, the temperature control working roller 3, the second temperature control tension roller 4, the heating system of the second temperature control coiling roller 5, the cooling system and the temperature sensor 7 are all connected with the temperature control system 8. The temperature of each roller and the temperature of the thin plate/foil can be monitored in real time through the temperature control system and the temperature sensor and can be adjusted at any time.
In addition, when the first temperature-controlled winding roller 1 and the second temperature-controlled winding roller 5 are hot winding rollers, a heat-insulating cover 9 can be usually arranged outside the first temperature-controlled winding roller, or a heating cover can be arranged to avoid temperature loss and ensure the stability of the temperature.
Example 1
Based on the continuous coiling and rolling system, the Mg-Zn-RE magnesium alloy is continuously rolled, the thickness of the Mg-Zn-RE magnesium alloy coiled material before rolling is 3mm, the target thickness is 0.6mm, and the specific rolling process is as follows:
(1) The room temperature plasticity of the rolled Mg-Zn-RE magnesium alloy roll reaches more than 20%, a cold-hot combination mode of a hot coiling roller, a cold tension roller and a cold working roller or a cold coiling roller, a hot tension roller and a cold working roller is selected, the proper temperature is selected, and the temperature of the corresponding roller is set through a temperature control system;
if a cold and hot combination mode of a hot winding roller, a cold tension roller and a cold working roller is selected, the temperature of the first/second temperature control winding roller is controlled to be 100-150 ℃, the temperature of the first/second temperature control tension roller is controlled to be 20-25 ℃ and the temperature of the temperature control working roller is controlled to be 20-25 ℃ in the rolling process; in the embodiment, the temperature of the first/second temperature control winding roller is set to be 120 ℃, the temperature of the first/second temperature control tension roller is set to be 25 ℃, and the temperature of the temperature control working roller is set to be 25 ℃;
if a cold and hot combination mode of a cold winding roller, a hot tension roller and a cold working roller is selected, the temperature of the first/second temperature control winding roller is controlled to be 20-25 ℃, the temperature of the first/second temperature control tension roller is controlled to be 100-150 ℃ and the temperature of the temperature control working roller is controlled to be 20-25 ℃ in the rolling process; in the embodiment, the temperature of the first/second temperature control winding roller is set to be 20 ℃, the temperature of the first/second temperature control tension roller is set to be 150 ℃, and the temperature of the temperature control working roller is set to be 20 ℃;
(2) The method comprises the following steps of (1) coiling an Mg-Zn-RE magnesium alloy coiled material on a first temperature control coiling roller, heating or cooling the roller according to a selected cold and hot combination mode and temperature, starting a rolling system when the set temperature is reached, uncoiling and conveying the magnesium alloy material from the first temperature control coiling roller, synchronously measuring and adjusting the temperature of the magnesium alloy coiled material when the magnesium alloy material passes through a first temperature control tension roller, simultaneously controlling the trend and the stress state of the magnesium alloy coiled material by adjusting the position of the first temperature control tension roller, enabling the magnesium alloy material to horizontally enter a temperature control working roller for one-time rolling, adjusting the trend of a strip through a second temperature control tension roller after one-time rolling, and enabling the strip to be coiled on the second temperature control coiling roller;
(3) Adjusting the reversible rolling mill to work reversely, so that the coiled material on the second temperature-control coiling roller passes through the second temperature-control tension roller and the temperature-control working roller in sequence to be rolled for two times, and the strip is adjusted to be coiled on the first temperature-control coiling roller through the first temperature-control tension roller after being rolled for two times;
and (4) repeating the steps (1) to (3) to perform continuous coiling rolling for 26 times, wherein the deformation of each time is 1-10% until the magnesium alloy sheet coil with the thickness of 0.6mm is obtained.
Example 2
Based on the continuous coiling and rolling system, the AZ31 magnesium alloy is continuously rolled, the thickness of an AZ31 magnesium alloy coiled material before rolling is 1mm, the target thickness is 0.15mm, and the rolling process is as follows:
(1) According to the material characteristics (the room temperature elongation is 10-20%) of the AZ31 magnesium alloy rolled coil, selecting a cold-hot combination mode and a proper temperature of a hot coiling roller, a hot tension roller and a cold working roller, and setting the temperature of the corresponding rollers through a temperature control system;
the temperature of the first/second temperature control winding roller is 150-200 ℃, the temperature of the first/second temperature control tension roller is 150-200 ℃, and the temperature of the temperature control working roller is 20-25 ℃; in the embodiment, the temperature of the first/second temperature control winding roller is set to be 160 ℃, the temperature of the first/second temperature control tension roller is set to be 180 ℃, and the temperature of the temperature control working roller is set to be 25 ℃;
(2) The method comprises the following steps of (1) coiling an AZ31 magnesium alloy coiled material on a first temperature control coiling roller, heating or cooling the roller according to a selected cold and hot combination mode and temperature, starting a rolling system when the set temperature is reached, uncoiling and conveying the magnesium alloy material from the first temperature control coiling roller, synchronously measuring and adjusting the temperature of the magnesium alloy coiled material when the magnesium alloy material passes through a first temperature control tension roller, simultaneously controlling the trend and the stress state of the magnesium alloy coiled material by adjusting the position of the first temperature control tension roller, horizontally feeding the magnesium alloy material into a temperature control working roller for one-time rolling, adjusting the trend of a plate strip through a second temperature control tension roller after one-time rolling, and coiling the plate strip onto a second temperature control coiling roller;
(3) Adjusting the reversible rolling mill to work reversely, so that the coiled material on the second temperature-control coiling roller passes through the second temperature-control tension roller and the temperature-control working roller in sequence to be rolled for two times, and the strip is adjusted to be coiled on the first temperature-control coiling roller through the first temperature-control tension roller after being rolled for two times;
and (4) repeating the steps (1) to (3) to perform 32 times of continuous coiling rolling, wherein the deformation of each time is 1-6% until the magnesium alloy sheet coil with the thickness of 0.15mm is obtained.
Example 3
Based on the continuous coiling and rolling system, the pure magnesium is continuously rolled, the thickness of the pure magnesium coiled material before rolling is 0.1mm, the target thickness is 0.03mm, and the specific rolling process is as follows:
(1) Selecting a cold-hot combination mode of a hot coiling roller, a hot tension roller and a hot working roller and proper temperature according to the material characteristics of pure magnesium, and setting the temperature of the corresponding roller through a temperature control system;
the temperature of the first/second temperature control winding roller is 200-250 ℃, the temperature of the first/second temperature control tension roller is 200-250 ℃, and the temperature of the temperature control working roller is 200-250 ℃; in the embodiment, the temperature of the first/second temperature control winding roller is set to be 200 ℃, the temperature of the first/second temperature control tension roller is set to be 220 ℃, and the temperature of the temperature control working roller is set to be 220 ℃;
(2) The method comprises the following steps of coiling a pure magnesium coiled material on a first temperature-control coiling roller, heating or cooling the roller according to a selected cold-hot combination mode and temperature, starting a rolling system when the set temperature is reached, uncoiling and conveying the magnesium alloy material from the first temperature-control coiling roller, synchronously measuring and adjusting the temperature of the magnesium alloy coiled material when the magnesium alloy material passes through a first temperature-control tension roller, controlling the trend and the stress state of the magnesium alloy coiled material by adjusting the position of the first temperature-control tension roller, enabling the magnesium alloy material to horizontally enter a temperature-control working roller for one-time rolling, adjusting the trend of a strip through a second temperature-control tension roller after one-time rolling, and coiling the strip onto the second temperature-control coiling roller;
(3) Adjusting the reversible rolling mill to work reversely, so that the coiled material on the second temperature-control coiling roller sequentially passes through the second temperature-control tension roller and the temperature-control working roller to be rolled for two times, and the strip is adjusted by the first temperature-control tension roller after being rolled for two times to be coiled on the first temperature-control coiling roller;
and (4) repeating the steps (1) to (3) to perform 18 times of continuous coiling rolling, wherein the deformation of each time is 0.5 to 4 percent until the pure magnesium coil with the thickness of 0.03mm is obtained.
The mechanical properties and surface quality of the magnesium or magnesium alloy coils rolled in examples 1 to 3 were measured and shown in Table 1 below.
TABLE 1
The magnesium or magnesium alloy coiled material rolled by the method has better mechanical property and high surface quality, and meets the requirements.
Further, the magnesium alloy coils rolled by the combination of hot-and-cold coiling rolls, cold tension rolls and cold work rolls in example 1 and the magnesium alloy coils rolled in example 2 were sampled and examined metallographically, as shown in fig. 3 and 4, respectively. As can be seen from fig. 3 and 4, the grains of the finally obtained magnesium alloy coil are fine and uniformly distributed, and no obvious coarse grains are observed.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.
Claims (9)
1. A continuous coiling and rolling system for magnesium and magnesium alloy sheet/foil coiled materials is characterized by comprising a first temperature control coiling roller, a first temperature control tension roller, a temperature control working roller, a second temperature control tension roller, a second temperature control coiling roller and supporting rollers positioned on two sides of the temperature control working roller, wherein the first temperature control coiling roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control coiling roller are sequentially arranged;
one side or two sides of the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are provided with temperature sensors;
the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are cold and hot dual-purpose rollers, and the cold and hot dual-purpose rollers comprise a heating system and a cooling system;
and the heating system, the cooling system and the temperature sensor of the first temperature control winding roller, the first temperature control tension roller, the temperature control working roller, the second temperature control tension roller and the second temperature control winding roller are all connected with the temperature control system.
2. The continuous coiling and rolling system for magnesium and magnesium alloy sheet/foil coils as claimed in claim 1, wherein the first temperature control coiling roller and the second temperature control coiling roller are externally provided with heat preservation covers.
3. The continuous coiling and rolling system for magnesium and magnesium alloy sheet/foil coils as claimed in claim 1, wherein the temperature control working roll is a reversible mill working roll.
4. A continuous coiling rolling process of magnesium and magnesium alloy sheet/foil coiled materials, which utilizes the rolling system of any one of claims 1 to 3, and is characterized by comprising the following steps:
(1) Determining the types of magnesium and magnesium alloy, and determining the cold and hot combination mode of a first/second temperature control winding roller, a first/second temperature control tension roller and a temperature control working roller according to the room temperature plasticity of the magnesium and magnesium alloy;
(2) The method comprises the following steps of (1) coiling a magnesium or magnesium alloy coiled material onto a first temperature-control coiling roller, uncoiling the coiled material, adjusting the trend of the uncoiled plate strip by a first temperature-control tension roller to enable the plate strip to horizontally enter a temperature-control working roller for one-time rolling, adjusting the trend of the plate strip by a second temperature-control tension roller after one-time rolling, and coiling the plate strip onto a second temperature-control coiling roller;
(3) Adjusting the reversible rolling mill to work reversely, so that the coiled material on the second temperature-control coiling roller sequentially passes through the second temperature-control tension roller and the temperature-control working roller to be rolled for two times, and the strip is adjusted by the first temperature-control tension roller after being rolled for two times to be coiled on the first temperature-control coiling roller;
and (4) repeating the steps (1) to (3) to perform multi-pass continuous coiling rolling until the magnesium or magnesium alloy sheet/foil coil with the target thickness is obtained.
5. The continuous coiling and rolling process of magnesium and magnesium alloy sheet/foil coils as claimed in claim 4, wherein the cold and hot combination mode of the first/second temperature control coiling rolls, the first/second temperature control tension rolls and the temperature control working rolls in the step (1) comprises: the hot coiling roller, the cold tension roller, the cold working roller, the hot coiling roller, the hot tension roller, the cold working roller, the cold coiling roller, the cold tension roller, the cold working roller, the hot coiling roller, the hot Zhang Wengun, the hot working roller, the cold coiling roller, the hot working roller, the hot coiling roller, the cold tension roller, the hot working roller, the cold coiling roller, the cold tension roller and the hot working roller.
6. The continuous coiling and rolling process of magnesium and magnesium alloy sheet/foil coiled material according to claim 5, characterized in that in the step (1), when the magnesium alloy material has good plasticity, the cold and hot combination mode of the first/second temperature control coiling roller, the first/second temperature control tension roller and the temperature control working roller selects the hot coiling roller, the cold tension roller, the cold working roller or the cold coiling roller, the hot tension roller and the cold working roller;
when the magnesium alloy material has medium plasticity, the cold and hot combination mode of the first/second temperature control winding rollers, the first/second temperature control tension rollers and the temperature control working roller is selected from a hot winding roller, a hot tension roller and a cold working roller;
when the magnesium alloy material has poor plasticity, the cold and hot combination mode of the first/second temperature control winding rollers, the first/second temperature control tension rollers and the temperature control working roller is selected from a hot winding roller, a hot tension roller and a hot working roller.
7. The continuous coiling and rolling process of magnesium and magnesium alloy sheet/foil coiled material as claimed in claim 6, characterized in that in the step (1), when selecting hot coiling roller + hot tension roller + cold work roller or hot coiling roller + cold tension roller + cold work roller for magnesium alloy with good plasticity, the temperature of the first/second coiling roller is set to T = T 0 +10 ℃ wherein, T 0 The recrystallization temperature of the magnesium alloy material is delta h cold rolling deformation and the recrystallization temperature of the magnesium alloy material at the time t = L/2v, t is the time of the magnesium alloy plate strip with the effective length passing through the working roll, L is the effective length of the magnesium alloy plate strip passing through the working roll, and v is the linear velocity of the magnesium alloy plate strip in the rolling process.
8. The continuous coiling and rolling process of magnesium and magnesium alloy sheet/foil coiled material according to claim 4, characterized in that in the rolling process of step (2), the first/second temperature control coiling rolls, the first/second temperature control tension rolls and the temperature control working rolls heat or cool the magnesium alloy material in a surface contact heat conduction mode.
9. A continuous coiling and rolling process for magnesium and magnesium alloy sheet/foil coils as claimed in claim 4, characterized in that the thickness of the magnesium and magnesium alloy material before rolling is 0.1-5.0 mm, and the thickness of the magnesium and magnesium alloy material after rolling is 0.01-1.0mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116967285A (en) * | 2023-09-22 | 2023-10-31 | 江苏铭丰电子材料科技有限公司 | Copper foil calendering device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116967285A (en) * | 2023-09-22 | 2023-10-31 | 江苏铭丰电子材料科技有限公司 | Copper foil calendering device |
| CN116967285B (en) * | 2023-09-22 | 2023-12-15 | 江苏铭丰电子材料科技有限公司 | Copper foil calendering device |
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