CN114798732B - Method for regulating interface structure of bimetal laminated composite plate by multi-frequency composite current - Google Patents
Method for regulating interface structure of bimetal laminated composite plate by multi-frequency composite current Download PDFInfo
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- CN114798732B CN114798732B CN202210758981.0A CN202210758981A CN114798732B CN 114798732 B CN114798732 B CN 114798732B CN 202210758981 A CN202210758981 A CN 202210758981A CN 114798732 B CN114798732 B CN 114798732B
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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
- B21B1/38—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
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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
- B21B1/38—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/021—Twin mills
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Abstract
The invention discloses a method for regulating and controlling an interface structure of a bimetal laminated composite plate by using multi-frequency composite current, and belongs to the technical field of metal composite plate processing. The invention uses the ceramic roller to roll the double-layer layered composite plate, and the multi-band composite current is introduced to the upper end and the lower end of the clamp to perform excitation regulation and control in the rolling process. The high-frequency current leads the current to converge to a connecting interface to generate electric arc discharge, and the cathode atomization action of the electric arc discharge breaks an oxide film on the surface of the material; the low-frequency composite current waveform and amplitude are adjusted, so that current short-circuit explosion can be realized, the bombardment waves clean and remove the oxide film, meanwhile, the low-frequency composite current can coordinate the magnitude and direction of plastic flow, the appearance of the connecting interface is favorably adjusted, and the double-layer material is effectively jointed to form a solid-phase connecting interface controlled by clean interface waveform. The composite board obtained by the method has high connection strength, no sudden change of rolling force in the rolling process, and low loss on devices and boards.
Description
Technical Field
The invention belongs to the technical field of metal composite plate processing, and particularly relates to a method for regulating and controlling an interface structure of a bimetal laminated composite plate by using a multi-frequency composite current.
Background
With the development of science and technology and the requirement of important equipment, a single material is difficult to meet the requirements of engineering application, and particularly, the composite material is produced by considering the application of light, high-strength and extreme materials and the requirements of service aspects such as toughness, corrosion resistance, oxidation resistance or functionality of the materials. The double-layer composite board integrates the advantages of various single metals and becomes one of the most widely applied materials in the fields of aerospace, transportation, electronic information and the like.
At present, methods such as direct continuous rolling or corrugation rolling exist, layered composite plates such as stainless steel/carbon steel, titanium/carbon steel, aluminum/magnesium alloy and the like can be prepared, but no matter the layered composite plates are rolled in a cold state or a hot state, an oxide film on the surface of the layered composite plates cannot be effectively removed, and meanwhile, an effective connecting interface cannot be formed due to the shape of a flat interface, so that the production efficiency is low.
Disclosure of Invention
Aiming at the problems, the invention provides a method for regulating and controlling the interface structure of a bimetal laminated composite plate by using multi-frequency composite current.
The method utilizes high-frequency current to guide, simultaneously utilizes low-frequency composite current to coordinate, favorably regulates and controls the appearance of the connecting interface, can effectively remove oxides on the connecting interface of the prepared composite material, forms a solid-phase connecting interface controlled by a clean interface waveform, obviously improves the product quality and the qualification rate, and obtains the high-quality laminated composite board.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current comprises the following steps:
step 3, rolling the double-layer laminated composite plate: respectively placing the cleaned metal substrate and the cleaned metal composite plate into a clamp for clamping, then leading current to converge to a connecting interface by utilizing the skin effect and the proximity effect of high-frequency current to generate arc discharge, enabling an oxide film on the surface of a material to be broken through the cathode atomization effect, simultaneously adjusting the waveform and the amplitude of low-frequency current to realize current short circuit explosion, cleaning the oxide film by using bombardment waves, simultaneously coordinating the size and the direction of plastic rheology by using low-frequency composite current to favorably regulate and control the appearance of the connecting interface, finishing the excitation regulation and control of multi-frequency-band composite current, and obtaining the bimetal laminated composite plate.
Further, the current in the step 3 is 300 to 400A. The current control has the strong and weak effect on the heating and softening of the metal, the material can be broken when the current is too large, and the guiding effect cannot be achieved when the current is less than 300A. The heat is focused near the V-shaped junction area, so that the full plastic deformation and high-quality plastic connection of the connection part are facilitated;
furthermore, the frequency band of the high-frequency current in the step 3 is 10 kHz to 80 kHz, and the electrifying time is 30 s to 90 s. By adjusting the frequency range of the high-frequency current, arc discharge is generated, and the oxide film on the surface of the material is broken.
Further, the frequency range of the low-frequency current in the step 3 is 1 to 10 kHz, and the electrifying time is 1 to 15 s. And adjusting the waveform and amplitude of the low-frequency current, coordinating the magnitude and direction of plastic flow, realizing current short-circuit explosion, and cleaning an oxidation film by using bombardment waves. The oxide film on the surface connected with the heterogeneous material can be quickly and instantly cleaned;
further, the duty ratio in step 3 is 0 to 100%.
Furthermore, the pressing amount in the step 2 is 20-40% of the initial thickness of the metal substrate and the metal clad plate.
Further, the rotating speed of the roller in the step 2 is 5 to 10 r/min. The regulation and control of the rotating speed of the roller can make the effect of different materials more uniform after being electrified;
further, the angle of the clamp in the step 2 is 0-20 degrees. The angle of the clamp can be adjusted to facilitate different materials to pass in and out of the roller, and the surface of the material is uneven due to overlarge angle.
The double-layer laminated composite board is manufactured by the method for regulating and controlling the interface structure of the double-metal laminated composite board according to the multi-band composite current excitation.
A device for regulating and controlling the interface structure of a bimetal layered composite plate according to the multi-frequency composite current is a rolling mill and specifically comprises a rolling mill, a clamp, a composite power supply and corresponding connecting parts; the upper roller and the lower roller of the rolling mill are made of ceramic materials, so that current shunt is avoided, and the roller shafts are connected to the same frequency converter, so that the rotating speeds of the upper roller and the lower roller are the same in the rolling process; the upper roller and the lower roller are connected with a clamp, the upper side of the clamp is a negative electrode, and the lower side of the clamp is a positive electrode.
Compared with the prior art, the invention has the following advantages:
the invention utilizes the skin effect and proximity effect of high-frequency current to guide the current to converge to a connecting interface to generate electric arc discharge, and the cathode atomization effect of the electric arc discharge breaks an oxide film on the surface of a material; the low-frequency composite current waveform and amplitude are adjusted to realize current short circuit explosion, the bombardment wave cleans and removes the oxide film, the micro-explosion bombardment force can expel the liquid metal, so that the plastic region is jointed, and the generation of intermetallic compounds of brittle and hard phases is avoided;
meanwhile, the low-frequency composite current can coordinate the magnitude and direction of plastic rheology, and the appearance of a connecting interface is favorably regulated and controlled. The effective joint of the double-layer materials can form a solid-phase connecting interface controlled by a clean interface waveform, inhibit the edge crack condition of the composite board, reduce the deformation resistance, refine the structure of the composite material and obtain the high-quality laminated composite board. The continuous processing and manufacturing of the one-step method and the integration of the laminated composite board can be realized, the efficiency is high, and the precision is controllable.
Drawings
FIG. 1 is a schematic diagram of a process for controlling an interface structure of a bimetal laminated composite plate under a multi-frequency composite current;
FIG. 2 is a flow chart of the method for regulating the interface structure of a bimetal laminated composite plate by multi-band composite current excitation according to the invention;
FIG. 3 is a view of the interface structure of a bimetal laminated composite plate regulated by multi-band composite current excitation according to the invention,
in the figure, 1-ceramic roller, 2-clamp, 3-wire and 4-multi-band composite power supply;
FIG. 4 (a) is an interface profile without the addition of a multi-band composite current, and FIG. 4 (b) is an interface profile with the addition of a multi-band composite current;
FIG. 5 is a SEM and EDS results for a magnesium/titanium bonding interface;
FIG. 6 is a SEM result of the stainless steel/magnesium alloy bonding interface.
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
As shown in fig. 3, the device for regulating the interface structure of the bimetal laminated composite plate by using the multi-frequency composite current comprises a rolling mill, a clamp, a composite power supply and corresponding connecting devices. The upper roller and the lower roller of the rolling mill are made of ceramic materials, so that current shunt is avoided, and the roller shafts are connected to the same frequency converter, so that the rotating speeds of the upper roller and the lower roller are the same in the rolling process; the upper roller and the lower roller are connected with a clamp, the upper side of the clamp is a negative electrode, and the lower side of the clamp is a positive electrode.
A method for regulating and controlling an interface structure of a bimetal laminated composite plate by using a multi-frequency composite current, as shown in fig. 2, comprises the following steps:
1) Processing a blank: selecting AZ31BMg as a metal substrate and 6061Al as a metal composite plate, cutting the AZ31BMg and the 6061Al into cuboid plates with the size of 300 mm multiplied by 50 mm multiplied by 2 mm, firstly cleaning with propanol to remove grease and stains on the surface of the material, and then thoroughly cleaning the surface of the plates with alcohol.
2) Preparation before rolling of the composite plate: the rolling reduction is designed to be 40% of the initial thickness of the metal base plate and the metal clad plate according to the initial size of the composite plate, the rotating speed of an upper roller and a lower roller is designed to be 7 r/min, the angle of a clamp is adjusted to be 13 degrees, the parameter of the composite current is set to be 300A, the low frequency is 5 kHz, the high frequency is 40 kHz, the duty ratio is 60%, and the composite current is introduced into the clamp of a rolling mill.
3): rolling the double-layer composite plate: and respectively placing the cleaned AZ31BMg and 6061Al into a clamp, starting a rolling mill switch and a composite current switch, wherein the high-frequency current electrifying time is 60 s, and the low-frequency current electrifying time is 10 s. The composite board rotates along with the roller to carry out multi-band composite current excitation regulation and control, and the required double-layer layered composite board is obtained.
Fig. 4 (a) shows the interface of the Mg/Al composite plate without applying the multiband current, and fig. 4 (b) shows the interface of the Mg/Al composite plate with applying the multiband current. Therefore, the double-layer materials are effectively bonded, and a clean solid-phase connection interface is formed.
Example 2
A method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current comprises the following steps:
1) Processing a blank: selecting a Fe plate as a metal substrate and 6061Al as a metal composite plate, cutting the Fe plate and the 6061Al into cuboid plates with the size of 300 mm multiplied by 50 mm multiplied by 2 mm, firstly cleaning with propanol to remove grease and stains on the surface of the material, and then thoroughly cleaning the surface of the plates with alcohol.
2) Preparation before rolling of the composite plate: the design rolling reduction is 20% of the initial thickness of the metal substrate and the metal composite plate according to the initial size of the composite plate, the rotating speed of an upper roller and a lower roller is designed to be 5 r/min, the angle of a clamp is adjusted to be 1 degree, the parameter of the composite current is set to be 310A, the low frequency is 1 kHz, the high frequency is 10 kHz, the duty ratio is 80%, and the composite current is led into the clamp of the rolling mill.
3): rolling the double-layer composite plate: and respectively putting the cleaned Fe plate and 6061Al into a clamp, starting a rolling mill switch and a composite current switch, wherein the high-frequency current electrifying time is 80 s, and the low-frequency current electrifying time is 10 s. The composite board rotates along with the roller to carry out multi-frequency band composite current excitation regulation and control, and the required double-layer layered composite board is obtained. The results are shown in the following table:
TABLE 1
| Position of | Side of Fe plate | Interface (I) | 6061Al side |
| Average hardness (Gpa) | 3.457 | 7.038 | 1.03 |
Example 3
A method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current comprises the following steps:
1) Processing a blank: selecting a Cu plate as a metal substrate and 6061Al as a metal composite plate, cutting the Cu plate and the 6061Al into cuboid plates with the sizes of 300 mm multiplied by 50 mm multiplied by 2 mm, firstly cleaning with propanol to remove grease and stains on the surface of the material, and then thoroughly cleaning the surface of the plates with alcohol.
2) Preparation before rolling of the composite plate: designing the rolling reduction to be 20% of the initial thickness of the metal substrate and the metal clad plate according to the initial size of the composite plate, designing the rotating speed of an upper roller and a lower roller to be 5 r/min, adjusting the angle of a clamp to be 5 degrees, setting the parameters of the composite current to be 355A, setting the low frequency to be 3 kHz, setting the high frequency to be 20 kHz, setting the duty ratio to be 95%, and introducing the composite current to the clamp of the rolling mill.
3): rolling the double-layer composite plate: and respectively putting the cleaned Cu plate and 6061Al into a clamp, starting a rolling mill switch and a composite current switch, wherein the high-frequency current electrifying time is 40 s, and the low-frequency current electrifying time is 5 s. The composite board rotates along with the roller to carry out multi-band composite current excitation regulation and control, and the required double-layer layered composite board is obtained.
Example 4
A method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current comprises the following steps:
1) Blank processing: selecting TC4 titanium alloy as a metal substrate and AZ31Mg as a metal composite plate, cutting the TC4 titanium alloy and the AZ31Mg into cuboid plates with the size of 300 mm multiplied by 50 mm multiplied by 2 mm, cleaning with propanol to remove grease and stains on the surfaces of the materials, and then thoroughly cleaning the surfaces of the plates with alcohol.
2) Preparation before rolling of the composite plate: the rolling reduction is designed to be 20% of the initial thickness of the metal substrate and the metal composite plate according to the initial size of the composite plate, the rotating speed of an upper roller and a lower roller is designed to be 5 r/min, the angle of a clamp is adjusted to be 16 degrees, the parameter of the composite current is set to be 385A, the low frequency is 8 kHz, the high frequency is 30 kHz, the duty ratio is 65%, and the composite current is introduced into the clamp of a rolling mill.
3): rolling the double-layer composite plate: and respectively putting the cleaned TC4 titanium alloy and AZ31Mg into a clamp, starting a rolling mill switch and a composite current switch, wherein the high-frequency current electrifying time is 80 s, and the low-frequency current electrifying time is 12 s. The composite board rotates along with the roller to perform multi-band composite current excitation regulation and control, so as to obtain the required double-layer laminated composite board, as shown in figure 5.
Example 5
A method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current comprises the following steps:
1) Processing a blank: selecting 304 stainless steel as a metal substrate, AZ31Mg as a metal composite plate, cutting the 304 stainless steel and the AZ31Mg into cuboid plates with the size of 300 mm multiplied by 50 mm multiplied by 2 mm, firstly cleaning with propanol to remove grease and stains on the surface of the material, and then thoroughly cleaning the surface of the plates with alcohol.
2) Preparation before rolling of the composite plate: designing the rolling reduction to be 20% of the initial thickness of the metal substrate and the metal clad plate according to the initial size of the composite plate, designing the rotating speed of an upper roller and a lower roller to be 5 r/min, adjusting the angle of a clamp to be 5 degrees, setting the parameters of composite current to be 355A, the low frequency to be 10 kHz, the high frequency to be 75 kHz and the duty ratio to be 35%, and introducing the composite current to the clamp of the rolling mill.
3): rolling the double-layer composite plate: and respectively putting the cleaned Q235 carbon steel and 6061Al into a clamp, starting a rolling mill switch and a composite current switch, wherein the high-frequency current electrifying time is 60 s, and the low-frequency current electrifying time is 8 s. The composite board is subjected to multi-band composite current excitation regulation and control along with the rotation of the roller to obtain the required double-layer laminated composite board, as shown in figure 6.
Example 6
A method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current comprises the following steps:
1) Processing a blank: selecting a TC4 titanium alloy as a metal substrate, using Q235 carbon steel as a metal composite plate, cutting the TC4 titanium alloy and the Q235 carbon steel into cuboid plates with the size of 300 mm multiplied by 50 mm multiplied by 2 mm, firstly cleaning with propanol to remove grease and stains on the surfaces of the materials, and then thoroughly cleaning the surfaces of the plates with alcohol.
2) Preparation before rolling of the composite plate: designing the rolling reduction to be 20% of the initial thickness of the metal substrate and the metal composite plate according to the initial size of the composite plate, designing the rotating speed of an upper roller and a lower roller to be 10 r/min, adjusting the angle of a clamp to be 20 degrees, setting the parameters of composite current to be 330A, setting the low frequency to be 4 kHz, setting the high frequency to be 60 kHz, setting the duty ratio to be 30%, and introducing the composite current to the clamp of the rolling mill.
3): rolling the double-layer composite plate: and respectively putting the cleaned TC4 titanium alloy and Q235 carbon steel into a clamp, starting a rolling mill switch and a composite current switch, wherein the high-frequency current electrifying time is 90 s, and the low-frequency current electrifying time is 15 s. The composite board rotates along with the roller to carry out multi-band composite current excitation regulation and control, and the required double-layer layered composite board is obtained.
Those matters not described in detail in the present specification are well known in the art to which the skilled person pertains. Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
Claims (10)
1. A method for regulating and controlling an interface structure of a bimetal laminated composite plate by multi-frequency composite current is characterized by comprising the following steps: the method comprises the following steps:
step 1, blank processing: selecting a metal substrate and a metal clad plate, and cleaning the surfaces of the metal substrate and the metal clad plate;
step 2, preparation before rolling of the composite plate: designing the reduction according to the initial size of the composite board, designing the rotating speed of a roller, and adjusting the angle of a clamp;
step 3, rolling the double-layer laminated composite plate: respectively placing the cleaned metal substrate and the cleaned metal composite plate into a clamp for clamping, then leading current to converge to a connecting interface by utilizing the skin effect and the proximity effect of high-frequency current to generate arc discharge, breaking an oxide film on the surface of a material through the cathode atomization effect, simultaneously adjusting the waveform and the amplitude of low-frequency current to realize current short circuit explosion, cleaning the oxide film by using bombardment waves, and completing multi-band composite current excitation regulation and control to obtain the bimetal laminated composite plate.
2. The method for regulating the interface structure of the bimetal laminated composite plate according to the multi-frequency composite current of claim 1, wherein the method comprises the following steps: the composite current in the step 3 is 300 to 400A.
3. The method for regulating the interface structure of the bimetal laminated composite plate according to the multi-frequency composite current as claimed in claim 2, wherein the method comprises the following steps: the frequency range of the low-frequency current in the step 3 is 1 to 10 kHz; the energizing time of the low-frequency current is 1 to 15 s.
4. The method of claim 3, wherein the method comprises the steps of: the frequency range of the high-frequency current in the step 3 is 10 kHz-80 kHz; the energizing time of the high-frequency current is 30 to 90 s.
5. The method for regulating the interface structure of the bimetal laminated composite plate according to the multi-frequency composite current as claimed in claim 4, wherein the method comprises the following steps: the duty ratio in the step 3 is 1 to 100 percent.
6. The method of claim 5, wherein the method comprises the steps of: and in the step 2, the pressing amount is 20-40% of the initial thickness of the metal substrate and the metal composite plate.
7. The method of claim 6, wherein the method comprises the steps of: the rotating speed of the roller in the step 2 is 5 to 10 r/min.
8. The method of claim 7, wherein the method comprises the steps of: the angle of the clamp in the step 2 is 0 to 20 degrees.
9. A double-layered laminated composite board manufactured by the method for regulating the interface structure of the double-layered laminated composite board according to the multi-frequency composite current of any one of claims 1 to 8.
10. A device for a method for regulating an interface structure of a bimetal laminar composite board by using a multifrequency composite current according to any one of claims 1 to 8, wherein the method comprises the following steps: the device is a rolling mill and specifically comprises a rolling mill, a clamp, a composite power supply and corresponding connecting parts; the upper roller and the lower roller of the rolling mill are made of ceramic materials, and the roller shafts are connected to the same frequency converter; the upper roller and the lower roller are connected with a clamp, the upper side of the clamp is a negative electrode, and the lower side of the clamp is a positive electrode.
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