CN112756396A - Method for preparing metal composite thin/foil through ultrasonic-assisted rolling - Google Patents
Method for preparing metal composite thin/foil through ultrasonic-assisted rolling Download PDFInfo
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- CN112756396A CN112756396A CN202011520188.4A CN202011520188A CN112756396A CN 112756396 A CN112756396 A CN 112756396A CN 202011520188 A CN202011520188 A CN 202011520188A CN 112756396 A CN112756396 A CN 112756396A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
Abstract
The invention belongs to the technical field of metal composite thin/foil preparation, and particularly relates to a method for preparing a metal composite thin/foil through ultrasonic-assisted rolling, which comprises the following steps: a, preparing a metal thin/foil to be compounded, and carrying out surface treatment on the metal thin/foil to be compounded; b, one-time ultrasonic-assisted welding and rolling molding: stacking the metal thin/foil to be compounded, adopting a supporting roller and a working roller with the surface processed with reticulate patterns, and performing auxiliary rolling through an ultrasonic vibration system under a small rolling load to obtain a metal compound material with a partially meshed connecting interface; c, two-pass rolling forming: and (3) carrying out secondary rolling forming on the local meshing connection interface by adopting a supporting roller and a working roller with smooth surfaces under a large rolling load to obtain the composite thin/foil material of the metallurgical bonding interface. The metal composite thin/foil obtained by the invention has high flatness, good interface bonding performance, high rolling efficiency, low cost and high flexibility, and has obvious effects of improving the integral deformation of the metal composite thin/foil and improving the interface bonding strength.
Description
Technical Field
The invention belongs to the technical field of metal composite thin/foil preparation, and particularly relates to a method for preparing a metal composite thin/foil through ultrasonic-assisted rolling.
Background
The composite material is widely concerned due to the comprehensive advantages of each single material, and at present, the preparation of the metal composite plate mainly comprises an explosion cladding method and a direct rolling cladding method. The explosion cladding method is suitable for the cladding preparation of large-thickness plates, and particularly has obvious advantages in the preparation of clad plates with the thickness of more than 10 mm; the direct rolling composite method is mainly to prepare composite plates by using the principle that large rolling force enables metal to generate plastic deformation, and the interfaces of the composite plates are mostly mechanically combined, so that the preparation of metal plates easy to oxidize, metal plates difficult to deform and metal composite plates with large coordinated deformation difference needs vacuum environment or temperature compensation, and the cost is increased on the basis of increasing the process complexity.
The metal composite thin/foil has the advantages of high strength, excellent corrosion resistance, good electrical characteristics and the like, and has wide application prospect in the field of precision devices such as electricians and electronics, aerospace, national defense and military industry, instruments and meters and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for preparing a metal composite thin/foil through ultrasonic-assisted rolling. The method has the advantages of high efficiency, low cost and high flexibility, can realize metallurgical bonding of the metal composite thin/foil, and obtains the metal composite thin/foil with high flatness and good interface bonding performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing metal composite thin/foil through ultrasonic-assisted rolling comprises the following steps:
A. preparing a metal thin/foil to be compounded, and carrying out surface treatment on the metal thin/foil to be compounded;
B. one-pass ultrasonic-assisted welding and rolling molding: stacking the metal thin/foil to be compounded, adopting a supporting roller and a working roller with the surface processed with reticulate patterns, carrying out auxiliary rolling through an ultrasonic vibration system under the action of a small rolling force load, and crushing an oxide film on the surface of the metal by utilizing the ultrasonic action to obtain the metal composite thin/foil with a partially meshed connecting interface;
C. and (3) two-pass rolling forming: and rolling the metal composite thin/foil on the local meshing connection interface by adopting a supporting roller and a working roller with smooth surfaces under the action of a large rolling force load, so that the micro-area of the connection interface is further coordinated and deformed, and the metal composite thin/foil with the completely metallurgically bonded connection interface is obtained.
Further, in the step a, a specific method for performing surface treatment on the metal thin/foil to be compounded is as follows: and (3) dipping clean rags or cotton yarns into absolute ethyl alcohol cleaning solvent to scrub the surface and the side faces of the thin/foil material to be compounded for 2-3 times, and then wiping the thin/foil material to be compounded clean.
And in the step B, the ultrasonic control system comprises an ultrasonic generator, the ultrasonic generator is connected with a transducer, the transducer is connected with an amplitude transformer, the amplitude transformer is connected with a working roller through a coupling rod, and a supporting roller corresponding to the working roller is supported on a base.
Furthermore, in the step B, the vibration power of the ultrasonic vibration system is 0-4000W, and the vibration frequency is 30 kHz.
Compared with the prior art, the invention has the following advantages:
1. the invention is different from the traditional direct rolling composite forming, in a one-time ultrasonic auxiliary welding and rolling forming, a back-up roll and a working roll with reticulate patterns processed on the surface are adopted for ultrasonic auxiliary rolling forming under the action of a small rolling force load, the metal oxide film of an interface to be connected is removed by utilizing the ultrasonic action, and a metal thin/foil material to be compounded forms a regular, tooth-shaped and partially metallurgically combined connecting interface under the action of the small rolling force load; in the two-pass rolling forming, the support roller and the working roller with smooth surfaces are adopted to roll and form under the action of a large rolling force load, further coordinated deformation of a part of metallurgically bonded connecting interfaces is promoted, and a completely metallurgically bonded interface is achieved;
2. the ultrasonic-assisted rolling is introduced into one-time ultrasonic-assisted welding and rolling forming, so that the method has the effects of removing a metal oxide film, promoting local plastic deformation of metal in an interface micro-area and promoting metallurgical bonding of part of an interface by friction heat;
3. in the invention, the ultrasonic-assisted rolling forming is carried out by adopting the supporting roller and the working roller with the reticulate patterns processed on the surface under the action of a small rolling force load in one-time ultrasonic-assisted welding-rolling forming, so that a vacuum environment or temperature compensation is not needed, and the process complexity and the processing cost are reduced;
4. the invention can carry out repeated two-pass rolling forming on the metal composite thin/foil with partially meshed connecting interface obtained by one-pass ultrasonic-assisted welding and rolling forming so as to obtain the composite thin/foil with any required thickness.
Drawings
FIG. 1 is a schematic view of an ultrasonic assisted rolling apparatus;
FIG. 2 is a schematic side view of an ultrasonic assisted rolling apparatus;
FIG. 3 is a diagram showing the shape of a metal composite thin/foil connecting interface obtained by one-pass ultrasonic-assisted welding-rolling molding;
FIG. 4 is a diagram showing the shape of a metal composite thin/foil connecting interface obtained by two-pass rolling;
FIG. 5 is a graph of tensile load-displacement curve of a metal composite film/foil produced by ultrasonic-assisted rolling;
in the figure: 1-rolling mill system control box; 2-ultrasonic parameter display panel; 3-an ultrasonic generator; 4-a transducer; 5-an amplitude transformer; 6-a coupling rod; 7-a working roll; 8-supporting rolls; 9-a base; 10-rolling the surface sharp teeth; 11-aluminum alloy foil; 12-magnesium alloy sheet.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Preparing materials: aluminum alloy foil, magnesium alloy sheet, absolute ethyl alcohol;
the method comprises the following specific steps: an aluminum alloy foil 6061 with the size of 50mm multiplied by 150mm multiplied by 0.1 mm; the magnesium alloy sheet AZ31B has the size of 50mm multiplied by 150mm multiplied by 1 mm; absolute ethyl alcohol C2H6O, the dosage is 100mL +/-5 mL.
A method for preparing metal composite thin/foil through ultrasonic-assisted rolling comprises the following steps:
A. performing surface treatment on the magnesium alloy sheet 12 and the aluminum alloy foil 11:
the method specifically comprises the steps of scrubbing the surfaces and the side faces of the magnesium alloy sheet 12 and the aluminum alloy foil 11 for 2-3 times by using clean rags or cotton yarns dipped with an absolute ethyl alcohol cleaning solvent, and then wiping the surfaces and the side faces clean;
B. one-pass ultrasonic-assisted welding and rolling molding: combining and horizontally stacking a magnesium alloy sheet 12 and an aluminum alloy foil 11, ensuring that the magnesium alloy sheet 12 is placed on the lower side, placing the aluminum alloy foil 11 on the upper side, adopting a supporting roller 8 and a working roller 7 with surface-processed reticulate patterns, performing auxiliary rolling through an ultrasonic vibration system under the action of a small rolling force load, and crushing an oxide film on the surface of a metal by utilizing the action of ultrasonic waves to obtain a metal composite thin/foil with a partially meshed connection interface, wherein the depth of the reticulate pattern on the surface of the supporting roller 8 is 0.2mm, the depth of the reticulate pattern on the surface of the working roller 7 is 0.02mm, the power of an ultrasonic vibration system in the rolling process is 0-4000W, the vibration frequency is 30kHz, the working amplitude is 90%, and the loading pressure is 0.4 Mpa; the linear speed of the roller is 10mm/s, and the reference height of the working roller is 1.0 mm;
C. and (3) two-pass rolling forming: rolling the metal composite thin/foil of the local meshing connection interface by adopting a supporting roller 8 and a working roller 7 with smooth surfaces under the action of a large rolling force load, further coordinating and deforming micro areas of the connection interface to obtain the metal composite thin/foil completely metallurgically combined with the connection interface, wherein the linear speed of the roller surface of a rolling mill is 15mm/s, and the rolling reduction is 0.2mm +/-0.05 mm;
D. detecting, analyzing and characterizing;
detecting, analyzing and characterizing the morphology and the bonding strength of the obtained metal composite thin/foil connecting interface: analyzing the appearance of a two-pass connection interface of the rolled composite foil by using a scanning electron microscope; and analyzing the obtained interface bonding performance of the metal composite thin/foil by using an electronic universal tester.
As shown in fig. 3, the shape of the metal composite thin/foil connecting interface obtained by one-pass ultrasonic-assisted welding-rolling molding shows that the shape of the connecting interface is regular, toothed, and partial;
as shown in fig. 4, the morphology of the metal composite thin/foil connecting interface obtained by the two-pass rolling forming shows that the morphology of the bonding interface is a uniform metallurgical bonding interface.
As shown in fig. 5, the tensile load-displacement curve of the composite sheet prepared by ultrasonic-assisted rolling indicates that the tensile strength reaches 63.5 MPa;
the small rolling force load in the one-time ultrasonic-assisted welding and rolling forming is 0.15-0.8 MPa.
The reduction rate of the large rolling force load in the two-pass rolling forming is 15-45%.
The invention can be used for composite processing for preparing homogeneous or heterogeneous, double-layer or multi-layer metal thin/foil materials, including copper/copper, aluminum/aluminum, copper/silver, nickel/silver, copper/zinc, magnesium/aluminum and the like, and the total thickness of the prepared composite thin/foil materials is limited within the range of 0.05 mm-5 mm. In addition, the power, vibration frequency, roller size, surface texture shape and sharp tooth size of the ultrasonic vibration system can be changed according to different properties and sizes of materials to be compounded.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims.
Claims (4)
1. A method for preparing metal composite thin/foil through ultrasonic-assisted rolling is characterized by comprising the following steps: the method comprises the following steps:
A. preparing a metal thin/foil to be compounded, and carrying out surface treatment on the metal thin/foil to be compounded;
B. one-pass ultrasonic-assisted welding and rolling molding: stacking the metal thin/foil to be compounded, adopting a supporting roller (8) and a working roller (7) with the surface provided with reticulate patterns, carrying out auxiliary rolling through an ultrasonic vibration system under the action of a small rolling force load, and crushing an oxide film on the surface of the metal by utilizing the action of ultrasonic waves to obtain the metal composite thin/foil with a partially meshed connecting interface;
C. and (3) two-pass rolling forming: and rolling the metal composite thin/foil of the local meshing connection interface by adopting a supporting roller (8) and a working roller (7) with smooth surfaces under the action of a large rolling force load, so that the micro-area of the connection interface is further coordinated and deformed, and the metal composite thin/foil with the complete metallurgical bonding of the connection interface is obtained.
2. The method for preparing the metal composite thin/foil through ultrasonic-assisted rolling according to claim 1, wherein the ultrasonic-assisted rolling comprises the following steps: in the step A, the specific method for carrying out surface treatment on the metal thin/foil to be compounded is as follows: and (3) dipping clean rags or cotton yarns into absolute ethyl alcohol cleaning solvent to scrub the surface and the side faces of the thin/foil material to be compounded for 2-3 times, and then wiping the thin/foil material to be compounded clean.
3. The method for preparing the metal composite thin/foil through ultrasonic-assisted rolling according to claim 1, wherein the ultrasonic-assisted rolling comprises the following steps: in the step B, the ultrasonic control system comprises an ultrasonic generator (3), the ultrasonic generator (3) is connected with an energy converter (4), the energy converter (4) is connected with an amplitude transformer (5), the amplitude transformer (5) is connected with a working roll (7) through a coupling rod (5), and a supporting roll (8) corresponding to the working roll (7) is supported on a base (9).
4. The method for preparing the metal composite thin/foil through ultrasonic-assisted rolling according to claim 1, wherein the ultrasonic-assisted rolling comprises the following steps: in the step B, the vibration power of the ultrasonic vibration system is 0-4000W, and the vibration frequency is 30 kHz.
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Cited By (1)
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|---|---|---|---|---|
| CN114798732A (en) * | 2022-06-30 | 2022-07-29 | 太原理工大学 | Method for regulating interface structure of bimetal laminated composite plate by multi-frequency composite current |
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Application publication date: 20210507 |