CN111530930A - Hot rolling preparation method of magnesium-aluminum laminated plate - Google Patents
Hot rolling preparation method of magnesium-aluminum laminated plate Download PDFInfo
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- CN111530930A CN111530930A CN202010360882.8A CN202010360882A CN111530930A CN 111530930 A CN111530930 A CN 111530930A CN 202010360882 A CN202010360882 A CN 202010360882A CN 111530930 A CN111530930 A CN 111530930A
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- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000005098 hot rolling Methods 0.000 title claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 60
- 239000011777 magnesium Substances 0.000 claims abstract description 39
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 38
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 35
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000000137 annealing Methods 0.000 claims abstract description 10
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- 230000009467 reduction Effects 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 5
- 239000002905 metal composite material Substances 0.000 abstract description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A hot rolling preparation method of a magnesium-aluminum laminated plate belongs to the technical field of metal composite plate preparation, and is characterized by comprising the following implementation steps: s1, putting the magnesium and aluminum plates into a heating furnace for annealing, and then carrying out surface treatment on the combined surface; s2, overlapping the magnesium and aluminum plates together and fastening the magnesium and aluminum plates by using aluminum rivets; s3, placing the superposed magnesium and aluminum plates on an electromagnetic heating plate, taking the magnesium plate as a heating surface, heating to 400-450 ℃, keeping the temperature for 20-60 min, taking out, and sending into a rolling mill for asynchronous rough rolling; s4, placing the rough rolling plate into a heating furnace to be heated to 370-400 ℃, preserving heat for 10-30 min, immediately sending the rough rolling plate into a rolling mill to carry out two-pass asynchronous finish rolling, and setting furnace returning and heat preservation between passes; and S5, annealing the plate, taking out and air-cooling. The advantages are that: the different temperature heating and the asynchronous rolling are combined, the plasticity of the magnesium and the aluminum alloy is adjusted, and the rolling force and the coordinated deformation capability of the plate are improved through the rolling effect of the asynchronous rolling.
Description
The technical field is as follows:
the invention belongs to the technical field of metal composite plate preparation, and particularly relates to a hot rolling preparation method of a magnesium-aluminum laminated plate.
Background art:
the magnesium-aluminum laminated plate is a metal composite material with excellent mechanical property, and due to the fact that the melting point of component materials is low, the component materials are easy to recover and reuse, requirements of energy conservation, emission reduction and sustainable development can be well met, and therefore the magnesium-aluminum laminated plate has great potential in future application. The aluminum alloy has the advantages of soft texture, good corrosion resistance and extremely high intersolubility with the magnesium alloy, and can be used as a reinforcing coating to improve the application short plate with poor corrosion resistance and poor plasticity of the magnesium alloy.
According to the research in recent years, the following technical difficulties exist in the rolling lamination of the magnesium-aluminum laminated plate: 1. the processing plasticity of the magnesium alloy is greatly influenced by the temperature, and edge cracks and internal microcracks are easily generated when the rolling temperature is insufficient. In the hot rolling compounding process, the plasticity of the magnesium alloy is enhanced by reasonably increasing the rolling temperature, a laminated plate with good plate shape and high bonding strength can be prepared, and the oxidation of the magnesium alloy is difficult to control after the rolling temperature is increased. In the traditional rolling method, in order to prevent high-temperature oxidation, a magnesium and aluminum plate is generally fixed and assembled and then is sent into a heating furnace, and is heated to the same temperature under the protection of inert gas, while the aluminum alloy has higher ductility when being rolled at a temperature suitable for the processing deformation of the magnesium alloy, the reduction amount in the rolling pass is higher than that of the magnesium alloy, so that the accumulation phenomenon is easy to generate, and the surface damage is easy to generate when being finally rolled, so that the subsequent forming and processing utilization rate of the material are influenced; 2. under the same rolling force, the thinning amount in the previous rolling is larger due to the fact that the aluminum alloy is softer in texture; the magnesium alloy has smaller stress deformation degree in the early rolling, but activation of a non-basal plane slip system and transformation of texture occur after the thermal coupling effect in the early rolling, the plastic processing capability is improved, and the magnesium alloy becomes a main source of reduction of the plate thickness in the later rolling period. In the laminated plate, due to the difference of metal flow deformation capacities of the magnesium and aluminum layers, uneven stress deformation occurs in the compounding process, so that the flatness of a bonding interface is poor, the subsequent processing performance of the plate is further influenced, and the plate type control problem of the laminated plate is caused.
The invention content is as follows:
the invention aims to provide a hot rolling preparation method of a magnesium-aluminum laminated plate, which can effectively overcome the defects in the prior art.
The invention is realized in such a way, and is characterized by comprising the following implementation steps:
firstly, putting a magnesium plate and an aluminum plate into a heating furnace for stress relief annealing treatment;
namely, the magnesium plate is kept warm for 0.5h at 300 ℃, and the aluminum plate is kept warm for 1h at 350 ℃;
secondly, carrying out surface treatment on the annealed magnesium plate and the annealed aluminum plate;
respectively polishing a magnesium plate and an aluminum plate along the rolling width direction to increase friction force and form a sand surface effect which is easy to be bonded at high temperature, then cleaning oil stains by using absolute ethyl alcohol, and cleaning surface metal powder by using an ultrasonic cleaner;
thirdly, overlapping and assembling the magnesium and aluminum plates;
the method comprises the following steps of (1) overlapping a magnesium plate and an aluminum plate together, wherein the aluminum plate is arranged on the upper part, the magnesium plate is arranged on the lower part, n small holes are drilled in the front section surface of the magnesium plate in a 'door' shape, n is more than or equal to 4, and the magnesium plate and the aluminum plate are fixed through the small holes by using aluminum rivets to form a 'magnesium-aluminum double-layer plate';
fourthly, the magnesium-aluminum double-layer plate is placed on an electromagnetic heating plate to be heated, the magnesium plate surface is taken as a heating surface under the magnesium plate surface, the heating is carried out to 400-450 ℃ under the inert atmosphere, the temperature is kept for 20-60 min, then the magnesium plate is taken out and sent into a rolling mill to be subjected to asynchronous rough rolling, the reduction rate is within the range of 10-30%, and the differential ratio and the rolling speed cannot be set too large;
fifthly, placing the rough-rolled aluminum-magnesium plate into a heating furnace, heating the rough-rolled aluminum-magnesium plate in an inert atmosphere, immediately sending the rough-rolled aluminum-magnesium plate into a rolling mill for two-pass asynchronous finish rolling, setting the time of returning to the furnace and keeping the temperature between passes, wherein the rolling temperature range is 370-400 ℃, the heat preservation time is 10-30 min, and the rolling reduction rate is 20-30%; it should be noted that the different speed ratio and the rolling speed of the rolling mill cannot be set too large;
sixthly, annealing the rolled magnesium-aluminum composite plate blank, setting the temperature to be 250-350 ℃ and the time duration to be 0.5-1.5 h, taking out and air-cooling to the room temperature.
The invention has the beneficial effects that:
compared with the conventional rolling, the method combines the different-temperature heating and the asynchronous rolling, and improves the deformation coordination of the bimetal composite. In the preparation process of the magnesium-aluminum laminated plate, the magnesium-aluminum double-layer plate assembly blank plate is placed on an electromagnetic heating plate, only the magnesium plate is heated in an inert atmosphere, a temperature gradient is formed through contact heat transfer between the plates, the initial plastic deformation capacity of magnesium and aluminum alloy is adjusted, and the rolling deformation pressure and the coordinated deformation capacity of the plate are improved through the rolling effect of asynchronous rolling. In the subsequent finish rolling process, the plastic deformation capacity of the magnesium alloy is improved under the action of initial thermal coupling, and the laminated plate with excellent performance can be obtained through two times of asynchronous rolling with low reduction rate. The method has good effects of improving the flatness of the composite interface of the plate, improving the deformation coordination and the interface combination capability of the laminated plate and controlling the plate shape.
Description of the drawings:
FIG. 1 is a schematic view of a magnesium and aluminum plate assembly method.
Fig. 2 is a schematic view of an electromagnetic heating plate.
Fig. 3 is a schematic view of asynchronous rolling.
In the figure: 1-aluminum plate, 2-magnesium plate, 3-magnesium and aluminum plate superposed assembly, 3' -aluminum rivet, 4-metal cover, 5-vent valve, 6-electromagnetic heating plate, 7-feeding clamp and 8-rolling mill
The specific implementation mode is as follows:
the principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
In this example, a 1060 pure aluminum plate of 100 × 80 × 3mm and an AZ31 magnesium alloy plate of 100 × 80 × 4mm were selected as constituent materials, and the specific implementation steps were as follows:
1. firstly, performing stress relief annealing treatment on a magnesium plate and an aluminum plate: the annealing temperature of the magnesium plate is 300 ℃, the heat preservation time is 0.5h, the annealing temperature of the aluminum plate is 350 ℃, and the heat preservation time is 1 h;
2. carrying out surface treatment on the annealed magnesium and aluminum plates: firstly, grinding the laminated surfaces of the plates along the rolling width direction by using 400-mesh, 800-mesh and 1200-mesh sand papers respectively, washing oil stains by using absolute ethyl alcohol, and removing metal scraps by using an ultrasonic cleaner;
3. after the magnesium and aluminum plates are stacked and assembled, 5 small holes are punched in the front section of the plate surface in a ' door ' shape (as shown in figure 1) and are riveted and fastened by aluminum rivets 3 ' to form a magnesium-aluminum double-layer plate 3;
4. as shown in fig. 2 and 3, the magnesium-aluminum double-layer plate 3 is placed on an electromagnetic heating plate 6 for heating, inert gas is introduced through a vent valve 5 after a metal cover 4 is covered, high-temperature oxidation of magnesium alloy is prevented, heat is preserved for 0.5h after the heating temperature reaches 400 ℃, and then the magnesium-aluminum double-layer plate is immediately sent into a rolling mill for asynchronous rough rolling, wherein the rolling reduction rate is 30%, the differential speed ratio is 1.2, and the rolling speed is 15 rpm;
5. and (2) placing the roughly rolled aluminum-magnesium plate into a heating furnace, heating the aluminum-magnesium plate in an inert atmosphere, immediately sending the aluminum-magnesium plate into a rolling mill for two-pass asynchronous finish rolling, setting the furnace returning and heat preservation between passes, wherein the rolling temperature is 380 ℃, the first pass heat preservation is 15min, the reduction rate is 25%, the second pass heat preservation is 15min, the reduction rate is 20%, the differential speed ratio of the rolling mill is 1.1, and the rolling speed is 12 rpm.
6. And (3) annealing the composite plate blank at the temperature of 300 ℃ for 0.5h, taking out, and air-cooling to room temperature to obtain the magnesium-aluminum laminated plate.
Claims (1)
1. A hot rolling preparation method of a magnesium-aluminum laminated plate is characterized by comprising the following implementation steps:
firstly, placing a magnesium plate (2) and an aluminum plate (1) into a heating furnace for stress-removing annealing treatment;
namely, the magnesium plate (2) is insulated for 0.5h at 300 ℃, and the aluminum plate (1) is insulated for 1h at 350 ℃;
secondly, performing surface treatment on the annealed magnesium plate (2) and the annealed aluminum plate (1);
respectively polishing a magnesium plate (2) and an aluminum plate (1) along the rolling width direction to increase friction force and form a sand surface effect which is easy to be bonded at high temperature, then cleaning oil stains by using absolute ethyl alcohol, and cleaning metal powder on the surface by using an ultrasonic cleaner;
thirdly, overlapping and assembling the magnesium and aluminum plates;
the magnesium-aluminum double-layer plate is formed by superposing a magnesium plate (2) and an aluminum plate (1), wherein the aluminum plate (1) is arranged above the magnesium plate (2), n small holes are drilled in the front section surface of the magnesium plate (2) in a ' door ' shape, n is not less than 4, and the magnesium plate and the aluminum plate are fixed by aluminum rivets (3 ') through the small holes;
fourthly, the double-layer plate is placed on an electromagnetic heating furnace (6) provided with a metal cover and a vent valve, the magnesium plate (2) is taken as a heating surface under the double-layer plate, the double-layer plate is heated to 400-450 ℃ under the inert atmosphere, is kept warm for 20-60 min and then is taken out, and is sent into a rolling mill (8) for asynchronous rough rolling, the reduction rate is within the range of 10-30%, and the differential ratio and the rolling speed cannot be set too large;
fifthly, placing the rough-rolled aluminum-magnesium plate into a heating furnace, heating the rough-rolled aluminum-magnesium plate in an inert atmosphere, immediately sending the rough-rolled aluminum-magnesium plate into a rolling mill for two-pass asynchronous finish rolling, setting the time for returning the aluminum-magnesium plate into the furnace for heat preservation between passes, setting the rolling temperature range to be 370-400 ℃, setting the heat preservation time to be 10-30 min, setting the rolling reduction rate to be 20-30%, and setting the differential speed ratio and the rolling speed of the rolling mill not to be;
sixthly, annealing the rolled aluminum-magnesium composite plate blank, setting the temperature to be 250-350 ℃ and the time duration to be 0.5-1.5 h, taking out and air-cooling to the room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360882.8A CN111530930A (en) | 2020-04-30 | 2020-04-30 | Hot rolling preparation method of magnesium-aluminum laminated plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360882.8A CN111530930A (en) | 2020-04-30 | 2020-04-30 | Hot rolling preparation method of magnesium-aluminum laminated plate |
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| CN111530930A true CN111530930A (en) | 2020-08-14 |
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| CN202010360882.8A Pending CN111530930A (en) | 2020-04-30 | 2020-04-30 | Hot rolling preparation method of magnesium-aluminum laminated plate |
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Cited By (3)
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| CN113290051A (en) * | 2021-05-27 | 2021-08-24 | 东北大学 | Asynchronous rolling-local liquid phase compounding method for preparing aluminum/magnesium composite board |
| CN114346626A (en) * | 2021-12-14 | 2022-04-15 | 常州市常蒸蒸发器有限公司 | Production method of roll-bond evaporator for new energy equipment |
| CN116921430A (en) * | 2023-08-25 | 2023-10-24 | 太原科技大学 | Magnesium alloy plate toughening rolling method based on cooperative regulation and control of grain size and basal plane texture |
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| CN114346626A (en) * | 2021-12-14 | 2022-04-15 | 常州市常蒸蒸发器有限公司 | Production method of roll-bond evaporator for new energy equipment |
| CN116921430A (en) * | 2023-08-25 | 2023-10-24 | 太原科技大学 | Magnesium alloy plate toughening rolling method based on cooperative regulation and control of grain size and basal plane texture |
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Application publication date: 20200814 |