CN115739998A - Ultrasonic-assisted interface micro-melting warm-rolling compounding method for magnesium/titanium composite board with large thickness ratio - Google Patents
Ultrasonic-assisted interface micro-melting warm-rolling compounding method for magnesium/titanium composite board with large thickness ratio Download PDFInfo
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Abstract
The invention belongs to the field of rolling of composite plates, and particularly relates to an ultrasonic-assisted interface micro-melting warm rolling compounding method for a magnesium/titanium composite plate with a large thickness ratio, which comprises the following steps: s3, respectively installing an upper roller heating device and a lower roller heating device above the upper roller and below the lower roller, starting the upper roller heating device and the lower roller heating device, respectively heating the upper roller and the lower roller in a rotating manner, starting the rolling mill, enabling the upper roller and the lower roller to rotate at the rotating speed of 1.8-2.4 r/S, enabling the upper roller and the lower roller to be uniform in temperature in the circumferential direction, and starting to roll the composite plate blank after the upper roller and the lower roller are heated to respective specified temperatures; the upper roller and the lower roller are respectively heated by the upper roller heating device and the lower roller heating device, so that the upper roller and the lower roller have certain temperatures, and the temperature of the composite plate blank is prevented from being reduced in a rolling deformation area due to heat dissipation of the upper roller and the lower roller when rolling and compositing are carried out, and the composite forming of the composite plate blank is influenced.
Description
Technical Field
The invention belongs to the field of rolling of composite plates, and particularly relates to an ultrasonic-assisted interface micro-melting warm rolling compounding method for a magnesium/titanium composite plate with a large thickness ratio.
Background
With the development of aerospace science and technology, the steps explored by human beings have already moved to deep space, the novel aerospace craft has higher requirements on the performance of engineering materials, and metal composite plates with excellent performance of various metal materials gradually become a focus of attention. Magnesium and magnesium alloys are among the lightest metallic structural materials for industrial applications (density about 1.74 g/cm) 3 ) Has the advantages of good formability, high specific stiffness, high specific strength, good damping performance and the like, and is applied to high and new technologyThe method has extremely high application prospect in the field. However, low absolute strength, poor room temperature plasticity, poor corrosion resistance are bottlenecks that prevent their large scale application. Titanium and its alloy have the advantages of light weight, high strength, wear resistance and corrosion resistance, and are widely used in the fields of aerospace and high corrosion resistance. Therefore, the magnesium alloy with large thickness is used as a base layer, the extremely thin titanium alloy is used as a coating layer, and the prepared magnesium/titanium composite board with large thickness ratio (the magnesium/titanium thickness ratio is 20.
At present, the main preparation methods of the magnesium/titanium composite material comprise an explosion cladding method, a rolling cladding method, a diffusion cladding method and the like. The explosion cladding method has the advantages that the interface is instantly combined through the shock wave generated by explosion, the cost is low, but the defects of cracks, air holes and the like are easily generated on the interface under the explosion shock wave, the interface is not uniformly combined, and the environment is easily polluted. The diffusion compounding method comprises direct solid diffusion compounding and transient liquid phase diffusion compounding; because the solid solubility between the titanium and the magnesium is low and no intermetallic compound phase exists, the time required by direct solid-state diffusion compounding is long, the size and the shape of the product are also limited, and the method is not suitable for industrial large-scale production; the transient liquid phase diffusion compounding method generates a liquid phase through eutectic reaction of a base material and an intermediate layer, realizes combination of two materials through isothermal solidification and component homogenization of the liquid phase, has remarkable advantages for connection of dissimilar materials with low solid solubility and no compound phase, such as titanium and magnesium, but has the problems of shape and size limitation and production continuity which are still difficult to overcome. The magnesium/titanium composite plate prepared by the hot rolling compounding method has the advantages of simple process, good production continuity, large product size and the like, but because the titanium alloy and the magnesium alloy have large difference of plastic deformation capacities and difficult combination, the temperature required by rolling compounding is high, and the pass reduction rate is large (about 40 percent of single-pass critical reduction rate), the composite plate is easy to have the defects of buckling, uneven thickness and the like. In addition, for the preparation of the magnesium/titanium composite board with a large thickness ratio, the large reduction rate not only has a large influence on the thickness ratio of the finished product, but also can cause cracking of the extremely thin coating on the outer side, thereby bringing great challenges to high-quality composite and engineering application of the composite board. Therefore, how to overcome the size and efficiency limitations of the prior art, and realize the high-efficiency and high-quality combination of the magnesium/titanium composite plate with large thickness ratio becomes the key for promoting the forming and application of the layered metal composite material.
Disclosure of Invention
The invention provides an ultrasonic-assisted interface micro-melting warm rolling compounding method for a magnesium/titanium composite plate with a large thickness ratio.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ultrasonic-assisted interface micro-melting warm-rolling compounding method for a magnesium/titanium composite board with a large thickness ratio comprises the following steps:
s1, blank pretreatment, which specifically comprises the following steps:
s11, annealing, insulating, cleaning and polishing the large-thickness magnesium alloy plate and the titanium belt respectively to ensure that the large-thickness magnesium alloy plate, the titanium belt and the intermediate layer foil have uniform thickness and no corrosion on the surfaces;
s12, respectively cutting the large-thickness magnesium alloy plate, the titanium belt and the interlayer foil into the same length and width, then respectively polishing the large-thickness magnesium alloy plate, the titanium belt and the interlayer foil by using sand paper, then cleaning the large-thickness magnesium alloy plate, the titanium belt and the interlayer foil in acetone for 15min by using ultrasonic waves, removing oil stains on the surface, and then drying the surface of the plate by using a fan;
s13, after cleaning and drying, combining the large-thickness magnesium alloy plate, the middle layer foil and the titanium belt into a composite plate blank;
s2, placing the composite plate blank in a box-type vacuum heat treatment furnace, introducing inert protective atmosphere, heating the composite plate blank, and taking out the composite plate blank after the composite plate blank is heated to a specified temperature;
s3, respectively installing an upper roller heating device and a lower roller heating device above the upper roller and below the lower roller, starting the upper roller heating device and the lower roller heating device, respectively rotationally heating the upper roller and the lower roller, starting the rolling mill to enable the upper roller and the lower roller to rotate at the rotating speed of 1.8-2.4 r/S, enabling the upper roller and the lower roller to be uniform in temperature in the circumferential direction, and starting rolling of the composite plate blank after the upper roller and the lower roller are heated to respective specified temperatures;
s4, applying ultrasonic vibration to the upper roller and the lower roller through an ultrasonic vibration system, feeding the heated composite plate blank into a rolling mill, and carrying out primary composite rolling on the composite plate blank under the assistance of the ultrasonic vibration system to obtain a preliminarily formed magnesium/titanium composite plate with a large thickness ratio;
and S5, placing the preliminarily formed magnesium/titanium composite board with the large thickness ratio in a box type vacuum heat treatment furnace for furnace cooling, and after cooling is completed, cutting, leveling, polishing and cleaning the magnesium/titanium composite board to obtain a final magnesium/titanium composite board product with the large thickness ratio.
Further, the large-thickness magnesium alloy plate in the step S11 is any one of AZ31, AZ61 or AZ80, the intermediate layer foil is a pure Al tape or a pure Zn tape, the titanium tape is any one of TA1, TA2, TC4, TC6 or TC10, and the annealing in the step S11 is performed by placing the large-thickness magnesium alloy plate in a box-type vacuum heat treatment furnace, keeping the temperature for 30-60 min at 300-500 ℃, and placing the titanium tape in the box-type vacuum heat treatment furnace, keeping the temperature for 60-90 min at 800-1000 ℃.
Further, in the step S12, the cut lengths of the large-thickness magnesium alloy plate, the middle layer foil and the titanium belt are 60-250 mm and the width is 50-150 mm, meanwhile, the thickness of the large-thickness magnesium alloy plate is 5-15 mm, the thickness of the middle layer foil is 0.02-0.1 mm, and the thickness of the titanium belt is 0.05-0.2 mm,
furthermore, argon atmosphere needs to be introduced into the box type vacuum heat treatment furnace in the step S11, the step S2 and the step S5, the argon pressure is 0.95-1 MPa, and the mass purity of argon is 99.99%.
Furthermore, the heating temperature of the box type vacuum heat treatment furnace in the step S2 is 350-550 ℃, and the heat preservation time is 10-30 min.
Furthermore, in the step S3, the normal distance between the induction coil of the upper roller heating device and the upper roller and the normal distance between the induction coil of the lower roller heating device and the lower roller are both 3-5 mm, the frequency of the induction heating power supply of the upper roller heating device and the induction heating power supply of the lower roller heating device is 1000-2000 Hz, and the current density is 30-100 e5A/m2.
Furthermore, in the step S3, the upper roller and the lower roller are heated at different temperatures, the heating temperature of the roller close to the side of the titanium strip is 400-500 ℃, the heating temperature of the roller close to the side of the large-thickness magnesium plate is 200-300 ℃, and a specific temperature difference is generated.
Furthermore, in the step S4, the vibration frequency of the ultrasonic vibration system is 15-30 kHz, the amplitude is 5-15 μm, the reduction rate of one-pass composite rolling is 5-15%, and the rolling speed is 0.01-0.05 m/S.
Further, the furnace cooling temperature in the step S5 is 300-500 ℃, and the time is 30-90 min.
Compared with the prior art, the invention has the following advantages:
the invention applies ultrasonic vibration to the upper roller and the lower roller respectively in the rolling and compounding process of the magnesium/titanium composite plate with large thickness ratio through an ultrasonic vibration system, promotes the oxide film fragmentation of the to-be-compounded surface of the magnesium alloy plate with large thickness and the titanium belt under the action of proper eutectic temperature range and vibration/rolling force, realizes the high-strength combination of the magnesium alloy plate with large thickness and the titanium belt by utilizing the element diffusion, low-melting point eutectic reaction and isothermal solidification of the foil material of the middle layer, the magnesium alloy plate with large thickness and the titanium belt, and realizes the rolling of the dynamic continuous magnesium/titanium composite plate with large thickness ratio;
according to the invention, eutectic reaction and element diffusion are remarkably accelerated through the auxiliary action of ultrasonic vibration, so that the composition of a bonding interface structure is uniform, the grain refinement and the phase change time are shortened, the bonding interface stability and the mechanical property of the magnesium/titanium composite board with the large thickness ratio are improved, the cracking of the composite board is inhibited, and the quality of the magnesium/titanium composite board with the large thickness ratio is remarkably improved;
the upper roller and the lower roller are respectively heated by the upper roller heating device and the lower roller heating device, so that the upper roller and the lower roller have certain temperatures, the temperature of the composite plate blank is reduced in a rolling deformation area due to heat dissipation of the upper roller and the lower roller when rolling and compositing are avoided, the composite forming conforming to the plate blank is influenced, the roller temperatures of the upper roller and the lower roller are independently controllable, the upper roller and the lower roller can respectively generate specific temperature difference, the temperature gradient in the thickness direction can be ensured on the premise of supplementing heat for the composite plate blank, and the temperature distribution of a composite plate blank combining area and a non-combining area is indirectly adjusted;
according to the invention, the ultrasonic-assisted interface micro-melting warm rolling is adopted to compound the magnesium/titanium composite board with the large thickness ratio, so that the problems of large loss of the thickness ratio of the composite board, cracking of a coating titanium belt, high requirement on the performance of a rolling mill and the like caused by the large reduction rate and the rolling force required by the traditional rolling method are solved, meanwhile, a substitution scheme is provided for a diffusion compounding method which has the problems of low preparation efficiency, small finished product size and the like, and the dynamic continuous high-quality rolling compounding of the magnesium/titanium composite board with the large thickness ratio under the small reduction is realized;
according to the invention, different interface bonding strengths can be achieved by adopting the middle layer foils made of different materials according to requirements, and customized development is realized;
the invention breaks the oxide film on the surfaces of the magnesium alloy plate with large thickness and the titanium strip by using the sound flow and the cavitation effect of ultrasonic vibration, extrudes redundant eutectic liquid phase, reduces the thickness of the foil material of the middle layer to realize quick and effective connection in the atmospheric environment, can reduce the forming load during rolling and compounding, improves the forming performance of magnesium/titanium with large thickness ratio, improves the surface quality of the composite plate blank, and obviously reduces the residual stress generated in the process of compounding and forming.
Drawings
FIG. 1 is a schematic view of an apparatus of the present invention;
FIG. 2 is a microscopic schematic view of a composite interface of a magnesium/titanium composite board product with a large thickness ratio in example 1 of the present invention;
FIG. 3 is a microscopic view of the composite interface of the magnesium/titanium composite board product with a large thickness ratio in example 2 of the present invention;
in the figure, an ultrasonic vibration system-1 and a rolling mill-2 are shown.
Detailed Description
In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.
Example 1
S1, blank pretreatment, which specifically comprises the following steps:
s11, respectively annealing, insulating, cleaning and polishing the AZ31 magnesium alloy thick plate, the TC4 titanium belt and the 1060 aluminum foil to ensure that the AZ31 magnesium alloy thick plate, the TC4 titanium belt and the 1060 aluminum foil have uniform thickness and no rust on the surfaces; annealing and heat preservation, namely, placing an AZ31 magnesium alloy thick plate in a box type vacuum heat treatment furnace, preserving heat for 45min at 300 ℃, and placing a TC4 titanium belt in the box type vacuum heat treatment furnace, preserving heat for 60min at 800 ℃;
s12, respectively cutting the AZ31 magnesium alloy thick plate, the TC4 titanium strip and the 1060 aluminum foil into the same length and width, wherein the length and the width are respectively 80mm and 50mm, and the thickness is respectively 8mm, 0.1mm and 0.03mm, then respectively polishing the AZ31 magnesium alloy thick plate, the TC4 titanium strip and the 1060 aluminum foil by using sand paper, then respectively cleaning the large-thickness magnesium alloy plate, the titanium strip and the intermediate layer foil in acetone for 15min by using ultrasonic waves, removing oil stains on the surface, and then drying the surface of the plate by using a fan;
s13, after cleaning and drying, combining the AZ31 magnesium alloy thick plate, the TC4 titanium strip and the 1060 aluminum foil into a composite plate blank;
s2, placing the composite plate blank in a box type vacuum heat treatment furnace, introducing argon atmosphere, heating the composite plate blank at 550 ℃ for 10min, and taking out the composite plate blank after the composite plate blank is heated to a specified temperature, wherein the argon pressure is 1MPa, and the mass purity of argon is 99.99%;
s3, an upper roller heating device and a lower roller heating device are respectively installed above the upper roller and below the lower roller, the normal distance between an induction coil in the upper roller heating device and the upper roller and the normal distance between an induction coil in the lower roller heating device and the lower roller are both 3mm, the frequency of an induction heating power supply in the upper roller heating device and the induction heating power supply in the lower roller heating device are 1000Hz, and the current density is 50e 5 A/m 2 Starting an upper roller heating device and a lower roller heating device, respectively carrying out rotary heating on an upper roller and a lower roller, starting a rolling mill to enable the upper roller and the lower roller to rotate at a rotating speed of 1.8r/s, enabling the temperatures of the upper roller and the lower roller to be uniform in the circumferential direction, enabling the heating temperature of the roller close to one side of a titanium strip to be 400 ℃, the heating temperature of the roller close to one side of a large-thickness magnesium plate to be 200 ℃, and waiting for the upper roller and the lower roller to be heated to respective specified temperaturesRolling the composite plate blank after the rolling is finished;
s4, applying ultrasonic vibration to the upper roller and the lower roller through an ultrasonic vibration system, feeding the heated composite plate blank into a rolling mill, and carrying out primary composite rolling on the composite plate blank under the assistance of the ultrasonic vibration system to obtain a preliminarily formed magnesium/titanium composite plate with a large thickness ratio, wherein the vibration frequency of the ultrasonic vibration system is 20kHz, the amplitude is 15 mu m, the reduction rate of the primary composite rolling is 5%, and the rolling speed is 0.01m/S;
and S5, placing the preliminarily formed magnesium/titanium composite board with the large thickness ratio in a box type vacuum heat treatment furnace for furnace cooling at the temperature of 300 ℃ for 30min, and after cooling, cutting, leveling, polishing and cleaning the magnesium/titanium composite board to obtain a final magnesium/titanium composite board product with the large thickness ratio.
The interface observation of the magnesium-titanium composite plate with large thickness ratio prepared in the embodiment is carried out, as shown in fig. 2. It can be seen from the figure that the composite plate has a large thickness ratio and good interface bonding quality, eutectic layers exist between the upper titanium strip and the lower magnesium plate, and the thickness of the eutectic layers is uneven, which is mainly caused by the extrusion effect in the rolling process.
Example 2
S1, blank pretreatment, which specifically comprises the following steps:
s11, respectively annealing, insulating, cleaning and polishing the AZ61 magnesium alloy thick plate, the TC6 titanium belt and the zinc foil to ensure that the AZ61 magnesium alloy thick plate, the TC6 titanium belt and the zinc foil have uniform thickness and no rust on the surfaces; annealing and heat preservation, namely, placing an AZ61 magnesium alloy thick plate in a box type vacuum heat treatment furnace, preserving heat for 50min at 400 ℃, and placing a TC6 titanium belt in the box type vacuum heat treatment furnace, preserving heat for 60min at 900 ℃;
s12, respectively cutting the AZ61 magnesium alloy thick plate, the TC6 titanium strip and the zinc foil into the same length and width, wherein the length and the width are respectively 80mm and 50mm, and the thickness is respectively 8mm, 0.1mm and 0.03mm, then respectively polishing the AZ61 magnesium alloy thick plate, the TC6 titanium strip and the zinc foil by using sand paper, then cleaning the large-thickness magnesium alloy plate, the titanium strip and the middle-layer foil in acetone for 15min by using ultrasonic waves, removing oil stains on the surface, and then drying the surface of the plate by using a fan;
s13, after cleaning and drying, combining the AZ61 magnesium alloy thick plate, the TC6 titanium belt and the zinc foil into a composite plate blank;
s2, placing the composite plate blank in a box-type vacuum heat treatment furnace, introducing argon atmosphere, heating the composite plate blank at 550 ℃ for 10min, and taking out the composite plate blank after the composite plate blank is heated to a specified temperature, wherein the argon pressure is 1MPa, and the mass purity of argon is 99.99%;
s3, an upper roller heating device and a lower roller heating device are respectively installed above the upper roller and below the lower roller, the normal distance between an induction coil in the upper roller heating device and the upper roller and the normal distance between an induction coil in the lower roller heating device and the lower roller are both 5mm, the frequency of an induction heating power supply in the upper roller heating device and the lower roller heating device is 1500Hz, and the current density is 80e 5 A/m 2 Starting an upper roller heating device and a lower roller heating device, respectively carrying out rotary heating on an upper roller and a lower roller, starting a rolling mill, enabling the upper roller and the lower roller to rotate at the rotating speed of 2r/s, enabling the temperatures of the upper roller and the lower roller to be uniform in the circumferential direction, enabling the heating temperature of the roller close to one side of a titanium strip to be 450 ℃, enabling the heating temperature of the roller close to one side of a large-thickness magnesium plate to be 300 ℃, and starting the rolling of the composite plate blank after the upper roller and the lower roller are heated to respective specified temperatures;
s4, applying ultrasonic vibration to the upper roller and the lower roller through an ultrasonic vibration system, feeding the heated composite plate blank into a rolling mill, and carrying out primary composite rolling on the composite plate blank under the assistance of the ultrasonic vibration system to obtain a primarily formed magnesium/titanium composite plate with a large thickness ratio, wherein the vibration frequency of the ultrasonic vibration system is 20kHz, the amplitude is 15 mu m, the reduction rate of the primary composite rolling is 5%, and the rolling speed is 0.01m/S;
and S5, placing the preliminarily formed magnesium/titanium composite board with the large thickness ratio in a box type vacuum heat treatment furnace for furnace cooling at the temperature of 400 ℃ for 60min, and after cooling, cutting, leveling, polishing and cleaning the magnesium/titanium composite board to obtain a final magnesium/titanium composite board product with the large thickness ratio.
The interface observation of the magnesium-titanium composite plate with the large thickness ratio prepared in the embodiment is carried out, as shown in fig. 3. The figure shows that the composite board has good interface bonding quality, an Mg-Zn eutectic layer exists between the titanium belt on the upper side and the magnesium board on the lower side, and the thickness of the eutectic layer is uniform.
Example 3
S1, blank pretreatment, which specifically comprises the following steps:
s11, annealing, heat preservation, cleaning and polishing the AZ80 magnesium alloy thick plate, the TC10 titanium strip and the 1235 aluminum foil respectively to ensure that the AZ80 magnesium alloy thick plate, the TC10 titanium strip and the 1235 aluminum foil have uniform thickness and no corrosion on the surfaces; annealing and heat preservation, namely, placing the AZ80 magnesium alloy thick plate in a box type vacuum heat treatment furnace, preserving heat for 60min at 500 ℃, and placing the TC10 titanium belt in the box type vacuum heat treatment furnace, preserving heat for 80min at 1000 ℃;
s12, respectively cutting an AZ80 magnesium alloy thick plate, a TC10 titanium strip and a 1235 aluminum foil into the same length and width, wherein the length and width are respectively 80mm and 50mm, and the thickness is respectively 8mm, 0.1mm and 0.03mm, then respectively polishing the AZ80 magnesium alloy thick plate, the TC10 titanium strip and the 1235 aluminum foil by using sand paper, then respectively cleaning a large-thickness magnesium alloy plate, the titanium strip and the middle layer foil in acetone for 15min by using ultrasonic waves, removing surface oil stains, and then drying the surface of the plate by using a fan;
s13, after cleaning and drying, combining the AZ80 magnesium alloy thick plate, the TC10 titanium belt and the 1235 aluminum foil into a composite plate blank;
s2, placing the composite plate blank in a box-type vacuum heat treatment furnace, introducing argon atmosphere, heating the composite plate blank at 550 ℃ for 10min, and taking out the composite plate blank after the composite plate blank is heated to a specified temperature, wherein the argon pressure is 1MPa, and the mass purity of argon is 99.99%;
s3, an upper roller heating device and a lower roller heating device are respectively installed above the upper roller and below the lower roller, the normal distance between an induction coil in the upper roller heating device and the upper roller and the normal distance between an induction coil in the lower roller heating device and the lower roller are both 5mm, the frequency of an induction heating power supply in the upper roller heating device and the lower roller heating device is 2000Hz, and the current density is 100e 5 A/m 2 Starting an upper roller heating device and a lower roller heating device, respectively carrying out rotary heating on an upper roller and a lower roller, starting a rolling mill, enabling the upper roller and the lower roller to rotate at the rotating speed of 2.4r/s, enabling the temperatures of the upper roller and the lower roller to be uniform in the circumferential direction, enabling the heating temperature of the roller close to one side of a titanium strip to be 500 ℃, enabling the heating temperature of the roller close to one side of a large-thickness magnesium plate to be 300 ℃, and starting rolling of the composite plate blank after the upper roller and the lower roller are heated to respective specified temperatures;
s4, applying ultrasonic vibration to the upper roller and the lower roller through an ultrasonic vibration system, feeding the heated composite plate blank into a rolling mill, and carrying out primary composite rolling on the composite plate blank under the assistance of the ultrasonic vibration system to obtain a primarily formed magnesium/titanium composite plate with a large thickness ratio, wherein the vibration frequency of the ultrasonic vibration system is 20kHz, the amplitude is 15 mu m, the reduction rate of the primary composite rolling is 5%, and the rolling speed is 0.01m/S;
and S5, placing the preliminarily formed magnesium/titanium composite board with the large thickness ratio in a box type vacuum heat treatment furnace for furnace cooling at the temperature of 500 ℃ for 80min, and after cooling, cutting, leveling, polishing and cleaning the magnesium/titanium composite board to obtain a final magnesium/titanium composite board product with the large thickness ratio.
While there have been shown and described what are at present considered to be the essential features and advantages of the invention, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of being embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. An ultrasonic-assisted interface micro-melting warm-rolling compounding method for a large-thickness-ratio magnesium/titanium composite board is characterized by comprising the following steps of: the method comprises the following steps:
s1, blank pretreatment, which specifically comprises the following steps:
s11, annealing, insulating, cleaning and polishing the large-thickness magnesium alloy plate and the titanium belt respectively to ensure that the large-thickness magnesium alloy plate, the titanium belt and the intermediate layer foil have uniform thickness and no corrosion on the surfaces;
s12, respectively cutting the large-thickness magnesium alloy plate, the titanium belt and the interlayer foil into the same length and width, then respectively polishing the large-thickness magnesium alloy plate, the titanium belt and the interlayer foil by using abrasive paper, then cleaning the large-thickness magnesium alloy plate, the titanium belt and the interlayer foil in acetone for 15min by using ultrasonic waves, removing oil stains on the surface, and then drying the surface of the plate by using a fan;
s13, after cleaning and drying, combining the large-thickness magnesium alloy plate, the middle layer foil and the titanium belt into a composite plate blank;
s2, placing the composite plate blank in a box-type vacuum heat treatment furnace, introducing inert protective atmosphere, heating the composite plate blank, and taking out the composite plate blank after the composite plate blank is heated to a specified temperature;
s3, respectively installing an upper roller heating device and a lower roller heating device above the upper roller and below the lower roller, starting the upper roller heating device and the lower roller heating device, respectively rotationally heating the upper roller and the lower roller, starting the rolling mill to enable the upper roller and the lower roller to rotate at the rotating speed of 1.8-2.4 r/S, enabling the upper roller and the lower roller to be uniform in temperature in the circumferential direction, and starting rolling of the composite plate blank after the upper roller and the lower roller are heated to respective specified temperatures;
s4, applying ultrasonic vibration to the upper roller and the lower roller through an ultrasonic vibration system, feeding the heated composite plate blank into a rolling mill, and performing one-time composite rolling on the composite plate blank under the assistance of the ultrasonic vibration system to obtain a preliminarily formed magnesium/titanium composite plate with a large thickness ratio;
and S5, placing the preliminarily formed magnesium/titanium composite board with the large thickness ratio in a box type vacuum heat treatment furnace for furnace cooling, and after cooling is completed, cutting, leveling, polishing and cleaning the magnesium/titanium composite board to obtain a final magnesium/titanium composite board product with the large thickness ratio.
2. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio, according to claim 1, is characterized in that: the large-thickness magnesium alloy plate in the step S11 is any one of AZ31, AZ61 or AZ80, the middle layer foil is a pure Al tape or a pure Zn tape, the titanium tape is any one of TA1, TA2, TC4, TC6 or TC10, the annealing in the step S11 is carried out for heat preservation, the large-thickness magnesium alloy plate is placed in a box-type vacuum heat treatment furnace for heat preservation for 30-60 min at 300-500 ℃, and the titanium tape is placed in the box-type vacuum heat treatment furnace for heat preservation for 60-90 min at 800-1000 ℃.
3. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio, according to claim 1, is characterized in that: in the step S12, the cut large-thickness magnesium alloy plate, the middle layer foil and the titanium belt have the length of 60-250 mm and the width of 50-150 mm, meanwhile, the large-thickness magnesium alloy plate has the thickness of 5-15 mm, the middle layer foil has the thickness of 0.02-0.1 mm, and the titanium belt has the thickness of 0.05-0.2 mm,
4. the ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio, according to claim 2, is characterized in that: and (3) introducing argon atmosphere into the box type vacuum heat treatment furnace in the step (S11), the step (S2) and the step (S5), wherein the argon pressure is 0.95-1 MPa, and the mass purity of argon is 99.99%.
5. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio according to claim 1, characterized by comprising the following steps: and the heating temperature of the box type vacuum heat treatment furnace in the step S2 is 350-550 ℃, and the heat preservation time is 10-30 min.
6. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio, according to claim 1, is characterized in that: in the step S3, the normal distance between the induction coil of the upper roller heating device and the upper roller and the normal distance between the induction coil of the lower roller heating device and the lower roller are both 3-5 mm, the frequency of an induction heating power supply of the upper roller heating device and the lower roller heating device is 1000-2000 Hz, and the current density is 30-100 e5A/m < 2 >.
7. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio according to claim 1, characterized by comprising the following steps: in the step S3, the upper roller and the lower roller are heated at different temperatures, the heating temperature of the roller close to the titanium strip is 400-500 ℃, the heating temperature of the roller close to the magnesium plate with large thickness is 200-300 ℃, and a specific temperature difference is generated.
8. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio, according to claim 1, is characterized in that: in the step S4, the vibration frequency of the ultrasonic vibration system is 15-30 kHz, the amplitude is 5-15 μm, the reduction rate of one-time composite rolling is 5% -15%, and the rolling speed is 0.01-0.05 m/S.
9. The ultrasonic-assisted interface micro-melting warm-rolling compounding method of the magnesium/titanium composite board with the large thickness ratio, according to claim 1, is characterized in that: the furnace cooling temperature in the step S5 is 300-500 ℃, and the time is 30-90 min.
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| CN202211338818.5A CN115739998A (en) | 2022-10-28 | 2022-10-28 | Ultrasonic-assisted interface micro-melting warm-rolling compounding method for magnesium/titanium composite board with large thickness ratio |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116651937A (en) * | 2023-07-31 | 2023-08-29 | 海安太原理工大学先进制造与智能装备产业研究院 | Large-thickness-ratio magnesium/titanium composite board and gradient different-temperature rolling composite method |
| CN117531833A (en) * | 2024-01-10 | 2024-02-09 | 太原理工大学 | Pulse current assisted rolling compounding method for magnesium/titanium composite plate with large thickness ratio |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116651937A (en) * | 2023-07-31 | 2023-08-29 | 海安太原理工大学先进制造与智能装备产业研究院 | Large-thickness-ratio magnesium/titanium composite board and gradient different-temperature rolling composite method |
| CN116651937B (en) * | 2023-07-31 | 2023-10-13 | 海安太原理工大学先进制造与智能装备产业研究院 | Large-thickness-ratio magnesium/titanium composite board and gradient different-temperature rolling composite method |
| CN117531833A (en) * | 2024-01-10 | 2024-02-09 | 太原理工大学 | Pulse current assisted rolling compounding method for magnesium/titanium composite plate with large thickness ratio |
| CN117531833B (en) * | 2024-01-10 | 2024-04-02 | 太原理工大学 | Pulse current assisted rolling compounding method for magnesium/titanium composite plate with large thickness ratio |
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