CN113020263A - Method for rolling metal composite plate by double-crossed corrugated rollers - Google Patents
Method for rolling metal composite plate by double-crossed corrugated rollers Download PDFInfo
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- CN113020263A CN113020263A CN202110317478.7A CN202110317478A CN113020263A CN 113020263 A CN113020263 A CN 113020263A CN 202110317478 A CN202110317478 A CN 202110317478A CN 113020263 A CN113020263 A CN 113020263A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000002905 metal composite material Substances 0.000 title claims description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 11
- 238000000137 annealing Methods 0.000 claims description 9
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims 1
- 238000009966 trimming Methods 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
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- 239000000463 material Substances 0.000 description 10
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- 238000009792 diffusion process Methods 0.000 description 7
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- 238000003466 welding Methods 0.000 description 5
- 229910000861 Mg alloy Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
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- 239000010959 steel Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
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- 238000010008 shearing Methods 0.000 description 2
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- 230000003064 anti-oxidating effect Effects 0.000 description 1
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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
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- 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
- B21B2001/386—Plates
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Abstract
本发明涉及金属复合板制备技术领域，具体是一种双交叉波纹辊轧制金属复合板的方法，旨在解决采用现有轧制方法制成的金属复合板界面结合强度低、翘曲和边裂严重等技术问题。采用如下技术方案：将常规方法制得的金属复合板坯料放入波纹辊轧机进行轧制，波纹辊轧机的上下轧辊均为交叉波纹辊，压下率选择范围为30%～50%，得到上下表面和结合界面均为波纹辊的金属复合板I，再利用平辊轧机进行二道次轧制，压下率选择范围为20%～40%，得到上下表面为平面而结合界面为波纹面的金属复合板II。可以得到结合强度高，残余应力小，板材翘曲轻，边裂现象少的高质量金属复合板。
The invention relates to the technical field of metal clad plate preparation, in particular to a method for rolling a metal clad plate with double-cross corrugated rollers, and aims to solve the problems of low interface bonding strength, warpage and edge edges of the metal clad plate made by the existing rolling method. Serious cracking and other technical problems. The following technical scheme is adopted: the metal clad sheet blank obtained by the conventional method is put into a corrugated rolling mill for rolling, the upper and lower rolls of the corrugated rolling mill are cross corrugated rolls, and the selection range of the reduction ratio is 30% to 50%. The metal clad plate I, whose surface and bonding interface are both corrugated rolls, is then rolled with a flat roll mill for two passes, and the reduction ratio is selected in the range of 20% to 40%, and the upper and lower surfaces are flat and the bonding interface is corrugated. Metal Clad Plate II. High-quality metal clad plates with high bonding strength, small residual stress, light warpage of the plate and few edge cracks can be obtained.
Description
Technical Field
The invention relates to the technical field of metal composite plate preparation, in particular to a method for rolling a metal composite plate by double-crossed corrugated rollers.
Background
The metal composite plate is a composite material which is processed and overlapped by two or more layers of heterogeneous metals through a special process to realize interface metallurgical bonding. Some metal resources have the advantages of excellent corrosion resistance, oxidation resistance, high strength, wear resistance, good biocompatibility and the like, but the wide application of the materials is limited by the expensive price and the limited resources. To solve this conflict, metal clad plate processes have been developed. The metal composite plate compounds metals with different properties, integrates the advantages of different metals, avoids respective defects, and has incomparable excellent comprehensive properties compared with a single metal plate. The metal composite plate realizes the interconnection of dissimilar materials through interface metallurgical bonding, and can be processed in various modes such as stamping, bending, welding, machining and the like. In industrial production, in order to exert the advantages and properties of rare and precious metals and save resources, a rare and precious metal layer is often coated on the surface of a low-cost metal plate, so that a low-cost metal composite plate can be designed into various metal combinations according to the requirements of industrial environment, and the low-cost metal composite plate not only has different metal combinations, but also has different thickness combinations and different layer number combinations.
At present, the metal composite plate has more preparation methods and is widely applied by an explosion cladding method, a diffusion welding method, a rolling cladding method and the like. The explosion cladding method is to stack the metal layers to be clad after cleaning, lay explosive on the top layer of the metal plates, utilize the high temperature and shock wave generated by explosive explosion to extrude, deform, bond and diffuse the metal plates, and realize interface bonding. The diffusion welding method is characterized in that under the temperature lower than the melting point of the material, pressure is applied to enable the metal plate interface to be tightly attached and generate solid diffusion, metallurgical bonding of the interface is achieved, the surface of the metal plate is generally required to be cleaned, an oxide film is removed, then the metal plate is laminated together and subjected to pressure diffusion in a vacuum furnace, and the diffusion welding method has the advantages of being uniform in interface bonding, stable in strength, free of pollution, capable of compounding raw materials with large performance and size difference, high in size precision, small in deformation, limited in size, long in diffusion time, low in efficiency and low in interface strength. The rolling composite method is characterized in that the pressure of a roller is utilized to enable metal to generate severe deformation, mutual diffusion among metal atoms is promoted under the double action of temperature and pressure, and interface metallurgical bonding is realized, the method is the most common process means in industrial production, and the method has the advantages of continuous production, high efficiency, wide production range, no size limitation, uniform interface, stable strength and high surface quality, has the defects of interface anti-oxidation treatment before hot rolling composite, sealing welding in a vacuum environment for active metal, high-power rolling equipment for realizing single-pass large deformation for cold rolling, easy cracking of workpieces and the like, and particularly aims at rolling of metal composite plates, and has the problems of difficult firm composite due to different properties and different elongation of two metals, easy existence of larger residual stress in the rolled composite plates, severe warping and side cracking of the composite plates and the like, and restricts the large-scale preparation and application of the composite board.
Disclosure of Invention
The invention aims to solve the technical problems of low bonding strength, serious warping and edge cracking and the like of the metal composite plate manufactured by the existing rolling method. To this end, a method for rolling a metal composite plate by double-crossed corrugated rolls is proposed.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method of rolling a metal composite plate with double cross corrugated rolls comprising the steps of:
s1, blank making: selecting a metal plate with relatively small deformation resistance as a base plate, and selecting a metal plate with relatively large deformation resistance as a composite plate; the thickness ratio of the base plate to the composite plate is 1-5, the surfaces of the base plate and the composite plate to be combined are polished by a steel wire brush, surface oxide layers and pollutants are removed, the surfaces of the two plates to be combined are oppositely stacked and fixedly connected at the edges (the base plate and the composite plate are ensured not to be dislocated or deviate when subjected to non-uniform tangential force in the rolling process), and a metal composite plate blank is obtained;
s2, one-pass rolling: when a cold rolling process is adopted, the metal composite plate blank prepared in the step S1 is directly sent into a corrugated roller mill for rolling, when a hot rolling/warm rolling process is adopted, the metal composite plate blank prepared in the step S1 is firstly put into a heating furnace to be heated to a proper temperature and then sent into the corrugated roller mill for rolling, the upper roller and the lower roller of the corrugated roller mill both adopt crossed corrugated rollers, the surface of each crossed corrugated roller is a curved surface formed by crossing transverse corrugations (namely the directions of the corrugations are vertical to the rolling direction) and longitudinal corrugations (namely the directions of the corrugations are parallel to the rolling direction), and the metal composite plate I with the upper surface and the lower surface being crossed corrugated surfaces and the bonding interface being a complex crossed corrugated surface is obtained through the processing of the process;
s3, two-pass rolling: when a cold rolling method is adopted, the metal composite plate I obtained in the step S2 is directly sent into a flat rolling mill for rolling, when a hot rolling/warm rolling method is adopted, the metal composite plate I obtained in the step S2 is sent into a heating furnace to be heated to a specified temperature and then sent into the flat rolling mill for rolling, the upper roller and the lower roller of the flat rolling mill both adopt flat rollers, and the metal composite plate II with a bonding interface of a crossed corrugated surface and upper and lower surfaces of a plane is obtained through the processing of the working procedure;
s4, annealing (namely adopting an annealing means common in the field, namely heating and cooling);
s5, finishing: and (5) straightening, cutting edges and preparing a finished product.
Further, in step S2, the working phase difference between the upper roller and the lower roller is 1/4-1/2 cycles, so as to ensure that the wave crests of the upper roller and the lower roller are staggered by a certain angle.
The invention has the beneficial effects that:
1) the crossed corrugated rollers are used on both sides of the base plate and the composite plate, so that the two plates are divided into a plurality of small areas according to the concave-convex structure specially designed on the surfaces of the rollers, the problems of large residual stress and serious warping of the composite plate caused by different elongation rates of the two metal plates are solved, and the shape of the composite plate can be controlled;
2) in one-pass rolling, the corrugation phase of the upper and lower crossed corrugated rollers is staggered by 1/4-1/2 periods, so that the situation that the wave crest is relatively thin locally to reduce the performance of the final composite plate is avoided, in addition, the corrugation phase of the upper and lower crossed corrugated rollers is staggered by 1/4-1/2 periods, materials at the joint interface of the base plate and the composite plate can generate a more violent kneading effect, the exposure of fresh and activated metal atoms in a larger range can be promoted, the metal atoms of the two materials are diffused, and the joint strength is further improved;
3) when the corrugated roller is used for rolling in one pass, the corrugated roller which is crossed up and down is adopted for rolling, and the concave-convex structure on the surface of the roller can generate strong and non-uniform rolling force action on the plate, so that the reduction rate required for reaching the same bonding strength is smaller, and the requirement on rolling equipment can be reduced;
4) the composite plate blank is rolled by adopting the upper and lower crossed corrugated rollers, so that the corrugated shapes corresponding to the crossed corrugated rollers can be generated at the edges of the base plate and the composite plate simultaneously, the generated local deformation provides allowance and space for material extension during two-pass flat rolling, and the edge crack phenomenon can be greatly avoided;
5) the blanking process is simple, and because the base plate and the compound plate are flat plates during blanking, the stability of the blanking process and the stability of the quality of the final composite plate can be more easily ensured by polishing and descaling the base plate and the compound plate.
Drawings
FIG. 1 is a schematic illustration of a metal composite plate blank;
FIG. 2 is a schematic view of a cross corrugation roll configuration;
FIG. 3 is a schematic view of a process for cold rolling a metal composite plate with double crossed corrugated rolls;
FIG. 4 is a schematic view of a process for hot rolling a metal composite plate with double cross corrugated rolls;
FIG. 5 is a schematic view of a metal composite plate I;
FIG. 6 is a schematic view of metal composite plate II;
in the figure, 1 ┄ substrate; 2 ┄ double plates; 3 ┄ a metal composite plate blank; 4 ┄ heating furnace; 5 ┄ cross corrugation rolls; 6 ┄ Metal clad Panel I; 7 ┄ flat roll; 8 ┄ metal composite plate II.
Detailed Description
The first embodiment is as follows:
referring to fig. 1-6, a method of rolling a Mg/Al composite panel with double crossed corrugated rolls includes the steps of:
s1, blank making: selecting a 5052-grade aluminum alloy plate with relatively small deformation resistance as a base plate 1, selecting a magnesium alloy plate with 100mm, 50mm and 2mm in length, width and height, selecting an AZ 31-grade magnesium alloy plate with relatively large deformation resistance as a composite plate 2, selecting a 100mm, 50mm and 2mm in length, width and height, polishing the surfaces to be combined of the base plate and the composite plate by using a steel wire brush, removing a surface oxide layer and pollutants, relatively stacking the surfaces to be combined of the two plates, and fixedly connecting the surfaces at the edges to obtain a metal composite plate blank; the base plate 1 and the compound plate 2 are fixedly connected by common fixing means such as riveting and the like.
S2, one-pass rolling: putting the metal composite plate blank 3 prepared in the step S1 into a heating furnace 4, heating to 400 ℃, keeping the temperature for 15min, and then sending the metal composite plate blank into a corrugated roller mill for rolling, wherein the upper roller and the lower roller of the corrugated roller mill both adopt cross corrugated rollers 5, the surface of each cross corrugated roller 5 is a curved surface formed by crossing transverse corrugations and longitudinal corrugations, and the radial section line equation of each cross corrugated roller 5 is
Wherein R is the radius of the crossed corrugated roller 5, and t is more than or equal to 0 and less than or equal to 1; the equation of axial section is
T is more than or equal to 0 and less than or equal to 1, the average radii of the upper roller and the lower roller are both 75mm, the linear speeds of the upper roller and the lower roller are both 7.5m/min, the reduction rate is 40%, in other embodiments, 30% or 35% or 45% or 50% can be selected, the reduction rate is determined according to parameters such as different metal materials, different rolling amplitudes and the like, the adjustment of the reduction rate is realized by adjusting the roller spacing of a rolling mill, the metal plate cracks due to the fact that the reduction rate is too large, the corrugated joint surface cannot be formed due to the fact that the reduction rate is too small, and for common metals, the selection range of the reduction rate. Similarly, the parameters of the step such as the roll interval and the wave amplitude of the corrugated roll are selected according to the reduction ratio, the metal plate material and the likeAnd the adjustment of the stress is easily determined by a person skilled in the art, so long as the metal composite plate I with the upper surface and the lower surface being crossed corrugated surfaces and the bonding interface being a complex crossed corrugated surface is obtained by the processing of the working procedure.
S3, two-pass rolling: and (4) feeding the metal composite plate I obtained in the step (S2) into a heating furnace 4, heating to 400 ℃, keeping the temperature for 5min, and feeding the metal composite plate I into a flat rolling mill for rolling, wherein the upper roller and the lower roller of the flat rolling mill both adopt flat rollers 7, the sizes of the upper roller and the lower roller of the flat rolling mill in the step are the same, the reduction rate is selected to be 30%, and the metal composite plate II with a complex cross corrugated surface as a bonding interface and planar upper and lower surfaces is obtained by processing in the working procedure. The reduction rate is 30% in the present embodiment, and 20% or 40% in other embodiments, and for common metals, the reduction rate in the present step is selected in the range of 20% to 40%.
S4, putting the metal composite plate II after the flat rolling into the heating furnace 4 for annealing treatment, wherein the annealing temperature is 300 ℃, and the annealing time is 30 min.
S5, finishing: and (5) straightening, cutting edges and preparing a finished product.
Comparative example one:
a method for rolling Mg/Al composite plates by using crossed corrugated rollers comprises the following steps:
s1, blank making: selecting a 5052-grade aluminum alloy plate with relatively small deformation resistance as a base plate 1, selecting 100mm, 50mm and 2mm in length, width and height respectively, selecting an AZ 31-grade magnesium alloy plate with relatively large deformation resistance as a composite plate 2, selecting 100mm, 50mm and 2mm in length, width and height respectively, polishing the surfaces to be combined of the base plate 1 and the composite plate 2 by using a steel wire brush, removing a surface oxide layer and pollutants, relatively stacking the surfaces to be combined of the two plates, and fixedly connecting the surfaces at the edges to obtain a metal composite plate blank.
S2, one-pass rolling: putting the metal composite plate blank 3 prepared in the step S1 into a heating furnace 4, heating to 400 ℃, keeping the temperature for 15min, and then sending the metal composite plate blank into a corrugated roller mill for rolling, wherein the upper roller of the corrugated roller mill adopts a crossed corrugated roller 5, the lower roller of the corrugated roller mill is a flat roller 7, the surface of the crossed corrugated roller 5 is a curved surface formed by crossing transverse corrugations and longitudinal corrugations, and the radial section line equation of the crossed corrugated roller 5 is that
Wherein R is the radius of the crossed corrugated roller 5, and t is more than or equal to 0 and less than or equal to 1; the equation of axial section is
Wherein t is more than or equal to 0 and less than or equal to 1, the average radius of the upper roller is 75mm, the radius of the lower roller is 75mm, the linear velocity of the rollers is 7.5m/min, and the reduction rate is 40 percent.
S3, two-pass rolling: and (4) feeding the metal composite plate I obtained in the step (S2) into a heating furnace 4, heating to 400 ℃, keeping the temperature for 5min, and feeding the metal composite plate I into a flat rolling mill for rolling, wherein the upper roller and the lower roller of the flat rolling mill both adopt flat rollers 7, the sizes of the upper roller and the lower roller of the flat rolling mill in the step are the same, the reduction rate is selected to be 30%, and the metal composite plate II with a cross corrugated surface as a bonding interface and planar upper and lower surfaces is obtained by processing in the working procedure.
S4, putting the metal composite plate II after the flat rolling into the heating furnace 4 for annealing treatment, wherein the annealing temperature is 300 ℃, and the annealing time is 30 min.
S5, finishing: and (5) straightening, cutting edges and preparing a finished product.
The characteristics and the performance of the Mg/Al composite plates rolled by the first embodiment and the comparative embodiment are observed and measured, and related items and parameters are shown in the following table:
| evaluation item | Example one | Comparative example 1 |
| Warping of sheet material | Is not obvious | Light and slight |
| Edge crack phenomenon | Is not obvious | Is not obvious |
| Pulling and shearing strength (rolling direction) | 42.83MPa | 35.21MPa |
| Pulling and shearing strength (horizontal) | 39.62MPa | 30.45MPa |
| Tensile strength (roll direction) | 328.62MPa | 273.14MPa |
| Tensile Strength (transverse) | 350.50MPa | 351.69MPa |
The experimental data in the above table are measured on a DNS200 electronic universal tester, and the other selection parameters are the same except for the rolling method used in processing, and the results are as follows: the bending of the plate produced by rolling the Mg/Al composite plate by the double-crossed corrugated rollers is very small, compared with the situation that the Mg/Al composite plate rolled by the single-crossed corrugated rollers is slightly bent, the edge cracks of the composite plate obtained by the two methods are not obvious, and the mechanical property test shows that the tensile strength and the shear strength of the Mg/Al composite plate rolled by the method are higher than those of the single-crossed corrugated rollers in both rolling direction and transverse direction, the rolling direction tensile strength of the Mg/Al composite plate rolled by the method is obviously better than that of the single-crossed corrugated rollers, the transverse tensile strength is close to that of the single-crossed corrugated rollers, and the analysis shows that the tensile strength is related to the special structure formed on the surface of the composite plate by the. In conclusion, the Mg/Al composite plate rolled by the method has better plate shape control capability, the bonding strength can be further improved, and the edge crack phenomenon can be effectively inhibited and eliminated.
The corrugated shapes of the transverse corrugations and the longitudinal corrugations on the surface of the crossed corrugated roller can adopt common corrugated shapes, preferably adopt sine curves, cosine curves, parabolas or triangles, and the structural parameters of the upper roller and the lower roller are preferably the same.
The working phase difference between the upper roller and the lower roller in the step S2 is 1/4-1/2 cycles, the wave crests of the upper roller and the lower roller are guaranteed to be staggered by a certain angle, the situation that the wave crests are relatively thin locally to reduce the performance of a final composite plate is avoided, in addition, the wave phase staggering of 1/4-1/2 cycles of the upper corrugated roller and the lower corrugated roller can enable materials at the joint interface of the base plate 1 and the composite plate 2 to generate a more violent kneading effect, the exposure of fresh and activated metal atoms in a larger range can be promoted, the metal atoms of the two materials are diffused, and the joint strength is further improved.
The present invention is not limited to the rolling of two-layer plates, but is also applicable to the rolling of three-layer plates, that is, in step S1, two clad plates 2 are provided, and the two clad plates 2 are stacked and placed directly above and directly below the base plate 1, respectively, and are compressed and the edges are fixedly connected to obtain the metal composite plate blank 3.
In step S2, the ratio of the amplitude of the surface of the cross corrugated roll 5 to the thickness of the thinner of the substrate or the clad sheet is 0.2 to 1. Specifically, it may be 0.2, 0.5, 0.8 or 1.
Specifically, in step S3, the flat rolling may be performed in multiple passes until the thickness of the composite sheet meets the design requirements.
The invention is not limited to the embodiments described, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083103A (en) * | 2021-11-15 | 2022-02-25 | 太原科技大学 | Preparation method of reinforced phase distribution controllable aluminum-based composite material |
| CN114850217A (en) * | 2022-07-05 | 2022-08-05 | 太原理工大学 | Rolling method of corrugated stainless steel/carbon steel composite plate with controllable bending radius |
| CN115026129A (en) * | 2022-08-10 | 2022-09-09 | 太原科技大学 | Method for preparing magnesium/titanium layered waveform interface composite material based on rolling method |
| CN118002621A (en) * | 2024-03-14 | 2024-05-10 | 太原理工大学 | Single-roller flat rolling equipment and method for high thickness ratio layered metal composite plate |
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| CN114850217A (en) * | 2022-07-05 | 2022-08-05 | 太原理工大学 | Rolling method of corrugated stainless steel/carbon steel composite plate with controllable bending radius |
| CN114850217B (en) * | 2022-07-05 | 2022-10-04 | 太原理工大学 | Rolling method of corrugated stainless steel/carbon steel composite plate with controllable bending radius |
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