CN114932145B - Method for rolling titanium/aluminum composite plate by moving induction heating titanium plate single-roller drive - Google Patents
Method for rolling titanium/aluminum composite plate by moving induction heating titanium plate single-roller drive Download PDFInfo
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- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 181
- 239000010936 titanium Substances 0.000 title claims abstract description 181
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 180
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 122
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 238000010438 heat treatment Methods 0.000 title claims abstract description 81
- 238000005096 rolling process Methods 0.000 title claims abstract description 77
- 230000006698 induction Effects 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 16
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000000670 limiting effect Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000007781 pre-processing Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 230000009467 reduction Effects 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- 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
- B21B2045/006—Heating the product in vacuum or in inert atmosphere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention relates to a method for rolling a titanium/aluminum composite plate by moving an induction heating titanium plate through single-roller driving, which comprises the following steps of S1, preprocessing the surface of an initial plate to be composited; s2, moving the induction heating assembly plate blank; s3, single-roller driving rolling; s4, atomizing and cooling; and S5, cutting. The moving induction heating method only carries out induction heating on the titanium plate, and only a roller in contact with the aluminum side plate is used as a driving roller and a roller in contact with the steel side plate is used as a driven roller in single-roller driven rolling; the titanium plate is easier to deform under the action of high temperature and larger friction shear stress during rolling, and the obtained titanium/aluminum composite plate has good deformation coordination and high bonding strength.
Description
Technical Field
The invention relates to the technical field of metal laminated composite plate preparation, in particular to a method for rolling a titanium/aluminum composite plate by moving, induction heating and single-roller driving of a titanium plate.
Background
Titanium has excellent properties of high strength, low density, corrosion resistance, fatigue resistance and the like and is known as space metal, and aluminum has good electric conduction and heat conduction properties and corrosion resistance, so that the titanium/aluminum composite plate is widely applied to the fields of aerospace, military affairs and medical appliances. However, titanium metal is expensive, which limits its application; the performance of aluminum in high temperature environment and corrosive environment is greatly reduced. The titanium/aluminum composite board has a phase compensation effect while keeping the characteristics of titanium and aluminum, can obtain excellent comprehensive mechanical properties through proper combination, and can greatly reduce the use cost.
At present, the titanium-aluminum composite plate is mainly prepared by a rolling composite method. The titanium plate and the aluminum plate are rolled by simultaneously heating so as to improve the bonding strength and the mechanical property. The rolling and compounding method is that different metal plate assemblies are rolled by rollers, the metal plates are subjected to severe elastic-plastic deformation under the action of the rollers, a film on the surface of the metal is broken, fresh metal is exposed, and the fresh metal is metallurgically bonded under high temperature and high pressure. The rolling and compounding method is favorable for realizing large-scale production and automation due to the fact that the rolled product is accurate in size, the thicknesses of the materials of all layers after compounding are uniform, the performance uniformity and the consistency of the composite material are good, the production continuity is high, and the method becomes a development trend for producing the laminated composite board at home and abroad.
However, the conventional rolling process for producing the titanium/aluminum composite plate has the following problems: because titanium/aluminium has large difference of deformation resistance at the same temperature, the deformation of aluminium is far larger than that of titanium during rolling and compounding, and because the rotating speeds of two rollers are consistent during rolling, the problems of serious warping after rolling, low bonding strength and the like are easily caused by inconsistent deformation after rolling, and the warping degree of the composite plate is overlarge, so that the composite plate cannot enter a straightening machine, and is inconvenient to anneal, and when the bonding strength of the composite plate is low, the composite plate is easy to crack in the straightening or annealing process. Therefore, the titanium/aluminum composite plate with high bonding strength and flatness is difficult to produce by adopting the existing rolling composite technology.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method for rolling a titanium/aluminum composite plate by moving an induction heating titanium plate through single-roller driving, wherein the titanium plate in a assembly is heated independently under protective gas, then the titanium plate is moved to a rolling inlet to enter a roller gap together with an aluminum plate at room temperature for rolling, so that the titanium/aluminum is rolled and compounded under the condition of similar deformation resistance, and the single-roller driving rolling can promote the metal coordinated deformation; meanwhile, after rolling, atomization cooling can quickly take away a large amount of residual heat on the titanium side, so that the temperature of the titanium-aluminum interface is lower than 350 ℃, and the generation of compounds on the titanium-aluminum interface is reduced.
The technical scheme adopted by the invention is as follows:
the invention provides a method for rolling a titanium/aluminum composite plate by moving an induction heating titanium plate through single-roller driving, which specifically comprises the following steps:
s1: pre-treating the surface of the plate blank to be compounded: cutting a titanium plate and an aluminum plate which are the same in width, wherein the titanium plate is 0.1-0.2m longer than the aluminum plate, removing oxide films on the surfaces to be compounded of the titanium plate and the aluminum plate respectively by using abrasive paper, cleaning oil stains and residues on the surfaces by using alcohol, aligning the tail ends of the plate blanks, reserving a gap between the front end of the titanium plate and the aluminum plate by using a metal gasket and binding the gap, adding a thin aluminum plate which is as wide as the aluminum plate on the part of the aluminum plate at the front end of the assembly rolling compared with the titanium plate and fixing the thin aluminum plate to obtain an assembly plate blank with the gap required by rolling;
s2, moving the induction heating assembly plate blank: placing the assembled plate blank into an induction heating device and a pulley block limiting groove in a protective gas outer cover, placing an aluminum layer at the rolling front end of the assembled plate blank in a roll gap and pressing down, wherein the pressing down rate is 20% -50%, introducing protective gas into a protective cover, starting a rolling mill and the induction heating device at the same time, and selecting the oscillation frequency of 60-80kHz; the highest temperature T reached by the induction heating titanium plate is established according to the following formula, and the induction heating power is adjusted to ensure that the temperature of the titanium plate is within the range of 700-850 ℃ when the titanium plate moves to a roll gap;
in the formula, T 1 The temperature of the titanium plate at the position of the roll gap is unit ℃; p is induction heating power, unit kW; p b Specific power during continuous heating, unit kW/m2; l is the distance from an induction coil close to the roller end to the roller gap, and is unit m; Δ L is the distance of heat conduction in unit time, in m; k is the coefficient of thermal conductivity, in W/(m.DEG C); b is the width of the titanium plate and the unit m; h is the thickness of the titanium plate and the unit m; q. q.s v Is a heat source in the titanium plate and has the unit of W/m 3 ；
S3, single-roller driving rolling: taking the aluminum plate side roller as a driving roller and the titanium plate side roller as a driven roller, carrying out single-roller driving rolling, pulling the bitten aluminum plate to drive the titanium plate after induction heating into a roller gap, and obtaining the titanium/aluminum composite plate after rolling; the rolling linear velocity of the driving roller in the induction heating process is determined by the following formula:
wherein v is the moving speed of the titanium plate and the unit is m/min; c is a plate moving speed coefficient, and the numerical range is 0.3-0.5; b is the vertical distance between the titanium plate and the induction coil, and the unit is m; p is b Specific power in kW/m for continuous heating 2 (ii) a Delta is the induction heating skin depth of the titanium plate, and the unit is m; q. q.s v Is a heat source in the titanium plate and has a unit of W/m 3 (ii) a t is heating time in min;
s4, atomizing and cooling: carrying out high-pressure spray surface cooling on the rolled titanium/aluminum composite plate to inhibit a compound from being generated at a titanium-aluminum bonding interface due to high temperature;
s5, cutting: and cutting the titanium/aluminum metal composite board to obtain the finished titanium/aluminum composite board.
Further, in the step S1, the titanium plate of the titanium-aluminum assembled plate blank with the gap is selected from any titanium plate, and the aluminum plate is selected from pure aluminum or aluminum alloy plate.
Further, in the step S1, the rolling front end of the titanium/aluminum plate blank is fixed by a metal wire, and a layer of thin aluminum plate with the same width is additionally attached to the rolling front end of the aluminum plate and fixed by an aluminum rivet; wherein, the thickness of the titanium plate is 0.001-0.002m, the thickness of the aluminum plate is 0.004-0.008m, and the thickness of the attached aluminum plate is 0.001m.
Further, in the step S2, a high-frequency induction heating device is used as the heating device.
Further, in the step S3, the linear velocity of the driving roller is set to be 0.72m/min-0.9m/min.
Further, in the step S4, one side of the rolled titanium plate is spray-cooled.
Further, in the step S5, a toothed saw is used for cutting.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, only the titanium plate is heated, so that the aluminum plate is in a room temperature state, the coordinated deformation in the rolling process of the titanium-aluminum composite plate is realized, and the bonding strength of the composite plate is greatly improved.
2. The invention reduces the requirements on the performance of the rolling mill by adopting single-roller driving to the side roller of the contact aluminum, reduces the warping degree of the rolled composite plate, is straight, has higher combination performance, and has the same ductility of all metal plates.
3. The invention utilizes the moving induction heating technology to realize uniform temperature distribution of the titanium plate at the rolling position along the width direction, effectively controls the temperature difference to be about 0-20 ℃, and makes up the problem of edge cracking caused by rapid heat dissipation of the edge part in the rolling process, wherein the temperature of the edge part is higher than the central temperature; the effective combination of the interface can be realized only by 20 percent of reduction ratio, and the shear strength of the titanium/aluminum composite plate interface can reach 107.5MPa when the reduction ratio is 50 percent at 800 ℃.
Drawings
FIG. 1 is a schematic flow chart of a method for rolling a titanium/aluminum composite plate by moving an induction heating titanium plate and driving the titanium plate by a single roller;
fig. 2 is a schematic process diagram of the present invention.
Wherein, the reference numbers: 1-a pulley block limiting groove; 2-titanium plate; 3-a breather pipe; 4-protective gas cover; 5-induction heating coil; 6-quartz glass; 7-a metal gasket; 8-a driven roller; 9-spray cooling means; 10-thin aluminum plate; 11-aluminum rivets; 12-a drive roller; 13-a metal wire; 14-aluminum plate.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
The method for rolling the titanium/aluminum composite plate by moving the induction heating titanium plate through single-roller driving, disclosed by the invention, as shown in figure 1, specifically comprises the following steps of:
s1, pretreatment of a plate blank surface to be compounded: cutting a titanium plate 2 and an aluminum plate 14 with the same width, wherein the titanium plate 2 is 0.1-0.2m longer than the aluminum plate 14, the titanium plate 2 is selected from any titanium plate, and the aluminum plate 14 is selected from pure aluminum or aluminum alloy plate; respectively removing oxide films on surfaces to be compounded of the titanium plate 2 and the aluminum plate 14 by using abrasive paper, cleaning oil stains and residues on the surfaces by using alcohol, aligning the tail ends of the plate blanks, reserving a gap between the front end of the titanium plate 2 and the aluminum plate 14 and binding the gap, adding a layer of thin aluminum plate 10 with the same width as the aluminum plate on the part, which is longer than the titanium plate 2, of the aluminum plate 14 at the front end of the assembly rolling, and fixing the thin aluminum plate by using an aluminum rivet 11 to obtain the assembled plate blank with the gap required by the rolling; the rolling front end of the titanium/aluminum plate assembly is fixedly assembled by adopting a metal wire 13; the thickness of the titanium plate 2 is 0.001-0.002m, the thickness of the aluminum plate 14 is 0.004-0.008m, and the thickness of the attached thin aluminum plate 10 is 0.001m;
s2, moving the induction heating assembly plate blank: placing the assembled plate blank into an induction heating device and a pulley block limiting groove 1 in a protective gas housing 4, wherein the induction heating device is a high-frequency induction heating device; placing 14 layers of the front-end aluminum plate in a roll gap and pressing down, wherein the pressing down rate is 20% -50%, introducing protective gas into a protective cover through a vent pipe 3, starting a rolling mill and an induction heating device at the same time, and selecting the oscillation frequency of 50-100kHz; the highest temperature T reached by the induction heating titanium plate 2 is formulated according to the following formula, and the induction heating power is adjusted, so that the temperature of the titanium plate 2 is within the range of 700-850 ℃ when the titanium plate moves to a roll gap;
in the formula, T 1 The temperature of the titanium plate at the position of the roll gap is unit ℃; p is induction heating power in kW; p is b Specific power in kW/m for continuous heating 2 (ii) a L is the distance between the induction line close to the roller end and the roller gap, and is the unit m; Δ L is the heat conduction distance per unit time, in m; k is the coefficient of thermal conductivity, in W/(m.DEG C); b is the width of the titanium plate and the unit m; h is the thickness of the titanium plate and has a unit of m; q. q.s v Is a heat source in the titanium plate and has the unit of W/m 3 ；
S3, single-roller driving rolling: a roller at the side of the aluminum plate 14 is used as a driving roller 12, and the linear speed of the roller of the driving roller 12 is set to be 0.72m/min-0.9m/min; the side roller of the titanium plate 2 is used as a driven roller 8 to carry out single-roller driven rolling, the roller rotates to drag the titanium plate 2 after the gripped aluminum plate 14 drives induction heating into a roller gap, and a titanium/aluminum composite plate is obtained after rolling; the rolling line speed of the drive roll 12 during induction heating is determined by the following equation:
wherein, v is the moving speed of the titanium plate, and the unit is m/min; c is a plate moving speed coefficient, and the numerical range is 0.3-0.5; b is the vertical distance between the titanium plate and the induction coil, and the unit is m; p is a radical of b Specific power in kW/m for continuous heating 2 (ii) a Delta is the skin depth of the titanium plate in the unit of m; q. q of v Is a heat source in the titanium plate and has a unit of W/m 3 (ii) a t is heating time in min;
s4, atomizing and cooling: carrying out high-pressure spray surface cooling on one side of a titanium plate of the rolled titanium-steel composite plate by a spray cooling device, thereby inhibiting a compound from being generated at a titanium-aluminum bonding interface due to high temperature;
s5, cutting: and cutting the titanium/aluminum metal composite board by using a toothed saw to obtain a finished product of the titanium/aluminum composite board.
The invention is further illustrated by the following two examples:
fig. 2 is a schematic process diagram of the present invention, wherein protective gas is introduced into a protective gas housing 4 through a vent pipe 3, an induction heating coil 5 is started to movably heat a titanium plate 2, when the top end of the heated titanium plate reaches a roll gap, the heated titanium plate is stacked with a room temperature aluminum plate 14 on the way and fixed by 13 metal wires, and then rolled, and the rolled composite plate is spray-cooled in a spray cooling device 9 to be formed and then cut.
Example 1
S1, pre-treating a surface to be compounded of a plate blank: cutting a titanium plate 2 with the length, width and thickness being 1m multiplied by 0.05m multiplied by 0.002m and an aluminum plate 14 with the length, width and thickness being 1.2m multiplied by 0.05m multiplied by 0.004m respectively, breaking an oxide layer on a surface to be compounded of the titanium aluminum plate by using a grinding machine with No. 180 abrasive paper, repeatedly cleaning the titanium plate 2 and the aluminum plate 14 after being cleaned in an ultrasonic cleaning instrument with alcohol, and finally immediately drying by using a dryer, aligning the rolled rear ends of the titanium plate 2 and the aluminum plate 14, clamping the rolled front end into a metal gasket 7 and binding and fixing by using a metal wire 13, adding a layer of thin aluminum plate 10 with the same width as the aluminum plate on the part of the aluminum plate 14 at the rolled front end of the assembly rolling compared with the titanium plate 2 and fixing by using an aluminum rivet 11 to obtain an assembled plate blank with a gap required by rolling;
s2, putting the assembly of the titanium plate 2 and the aluminum plate 14 into an induction heating device, introducing protective gas into a protective gas outer cover 4 through a vent pipe 3, starting an induction heating coil 5 to movably heat the titanium plate 2 through quartz glass 6, and rolling after the top end of the heated titanium plate 2 reaches a roll gap and is stacked with the room-temperature aluminum plate 14 on the way and fixed by a 13-wire; filling inert gas argon gas in the protective gas housing 4 for 4min, starting a rolling mill and an induction heating device simultaneously, setting the highest temperature T reached by the induction heating titanium plate 2 according to a formula with the oscillation frequency of 60kHz, adjusting the induction heating power to 36kW, and measuring the titanium plate 2 in real time by using an infrared thermometer when the titanium plate 2 moves to a roll gap, wherein the temperature of the titanium plate 2 at a rolling inlet reaches 700 ℃;
in the formula, T 1 The temperature of the titanium plate at the position of the roll gap is unit ℃; p is induction heating power, unit kW; p is b Specific power in kW/m for continuous heating 2 (ii) a L is the distance from the induction line close to the roller end to the roller gap in a unit of m; Δ L is the heat conduction distance per unit time in m; k is the coefficient of thermal conductivity, in W/(m.DEG C); b is the width of the titanium plate and the unit m; h is the thickness of the titanium plate and has a unit of m; q. q of v Is a heat source in the titanium plate and has the unit of W/m 3 ；
S3, rolling the titanium-aluminum plate assembly, wherein the rolling reduction is 20%, and the rolling speed is calculated according to the following formula:
wherein ν is the moving speed of the titanium plate, and the unit is m/min; c is a plate moving speed coefficient, and the numerical range is 0.3-0.5; b is the vertical distance between the titanium plate and the induction coil, and the unit is m; p is a radical of b Specific power in kW/m for continuous heating 2 (ii) a Delta is the induction heating skin depth of the titanium plate, and the unit is m; q. q.s v Is a heat source in the titanium plate and has the unit of W/m 3 (ii) a t is heating time in min;
s4, atomizing and cooling: the rolled composite board is formed after being sprayed and cooled in a spraying and cooling device 9;
s5, cutting: and cutting and segmenting the titanium/aluminum composite board by using a toothed saw, wherein the length and the width are respectively 100mm and 50mm, and thus obtaining the finished product titanium-aluminum composite board.
The titanium/aluminum composite board rolled in the embodiment has coordinated deformation, and the warp height value of the composite board is 1.5mm; when the reduction rate is 20%, the interfacial shear strength of the composite plate is 18.3MPa.
Example 2
S1, preparing a 5083 aluminum alloy plate with the length, width and thickness of 1.2m, 0.05m and 0.006m and a TA1 titanium plate with the length of 1m, 0.05m and 0.002m respectively, breaking an oxide layer on a surface to be compounded of the titanium aluminum plate by using a grinder with No. 180 abrasive paper, repeatedly cleaning the cleaned titanium plate 2 and the cleaned aluminum plate 14 in an ultrasonic cleaning instrument with alcohol, and finally immediately drying by using a dryer, aligning the rolled rear ends of the titanium plate 2 and the aluminum plate 14, clamping a metal gasket 7 at the rolled front end and binding and fixing by using a metal wire 13, and adding a layer of thin aluminum plate 10 with the same specification and size on the part of the aluminum plate 14, which is longer than the titanium plate, and fixing by using an aluminum rivet 11;
s2, placing the titanium plate 2 and the aluminum plate 14 assembly into an induction heating device shown in the figure 2, filling inert gas argon for 4min in a protective gas outer cover 4, simultaneously starting a rolling mill and the induction heating device, selecting an oscillation frequency of 80kHz, establishing the highest temperature T reached by the induction heating titanium plate 2 according to the following formula, adjusting the induction heating power to 40kW, and measuring the titanium plate 2 to a roll gap in real time by using an infrared thermometer when the titanium plate 2 moves to the roll gap, wherein the temperature of the titanium plate 2 at a rolling inlet reaches 850 ℃;
in the formula, T 1 The temperature of the titanium plate at the position of the roll gap is unit ℃; p is induction heating power, unit kW; p b Specific power in kW/m for continuous heating 2 (ii) a L is the distance between the induction line close to the roller end and the roller gap, and is the unit m; Δ L is the heat conduction distance per unit time, in m; k is the coefficient of thermal conductivity, in W/(m.DEG C); b is the width of the titanium plate and the unit m; h is the thickness of the titanium plate and the unit m; q. q.s v Is a heat source in the titanium plate and has the unit of W/m 3 ；
S3, rolling the titanium-aluminum plate assembly, wherein the reduction rate is 50%, and the rolling speed is selected and calculated according to the following formula:
wherein, v is the moving speed of the titanium plate, and the unit is m/min; c is a plate moving speed coefficient, and the numerical range is 0.3-0.5; b is the vertical distance between the titanium plate and the induction coil, and the unit is m; p is a radical of b Specific power in kW/m for continuous heating 2 (ii) a Delta is the induction heating skin depth of the titanium plate, and the unit is m; q. q.s v Is a heat source in the titanium plate and has a unit of W/m 3 (ii) a t is heating time in min;
s4, atomizing and cooling: the rolled composite board is formed after being sprayed and cooled in a spraying and cooling device 9;
s5, cutting: and cutting and segmenting the titanium/aluminum composite board by using a toothed saw, wherein the length and the width are respectively 100mm and 50mm, and thus obtaining the finished product titanium-aluminum composite board.
The titanium/aluminum composite board rolled by the embodiment is coordinated in deformation and straight; when the reduction rate is 50%, the interfacial shear strength of the composite plate is 107.5MPa.
The working principle of the invention is as follows: in the traditional rolling process, at the outlet position of a roll gap, an aluminum plate is subjected to larger compressive stress, a titanium plate is subjected to smaller tensile stress, when the composite plate leaves the roll gap and is not subjected to external force, the stress is released, the aluminum side extends and the titanium side contracts, and therefore the composite plate can warp towards the titanium side; when the single roller is driven to roll, the position of the same speed point of the roller and the composite plate is closer to the outlet, namely the neutral point moves forwards, so that the compressive stress borne by the aluminum plate is reduced, the tensile stress borne by the titanium plate is increased, and the warping degree of the composite plate after leaving the roll gap is greatly reduced. The temperature of the titanium plate subjected to moving induction heating is uniformly distributed in the width direction, the deformation resistance of titanium is reduced, the deformation of the titanium plate and the deformation of the aluminum plate are the same in a rolling area, the problem of rubbing and cracking of a bonding surface is solved, the bonding strength of the titanium/aluminum composite plate is improved, and the process implementation of annealing, straightening and the like after rolling is facilitated.
The invention is not the best known technology.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (6)
1. A method for rolling a titanium/aluminum composite plate by moving an induction heating titanium plate and driving the titanium plate by a single roller is characterized by comprising the following steps:
s1: pre-treating the surface of the plate blank to be compounded: cutting a titanium plate and an aluminum plate with the same width, respectively removing oxide films on the surfaces to be compounded of the titanium plate and the aluminum plate by using abrasive paper, cleaning oil stains and residues on the surfaces by using alcohol, aligning the tail ends of the plate blanks, reserving a gap between the front end of the titanium plate and the aluminum plate by using a metal gasket and binding the gap, adding a layer of thin aluminum plate with the same width as the aluminum plate on the part of the aluminum plate at the front end of the assembly rolling compared with the titanium plate and fixing the thin aluminum plate to obtain the assembled plate blank with the gap required by rolling;
s2, moving the induction heating assembly plate blank: placing the assembled plate blank into an induction heating device and a pulley block limiting groove in a protective cover, placing an aluminum plate at the rolling front end of the assembled plate blank into a roll gap and pressing down, wherein the pressing down rate is 20% -50%, introducing protective gas into the protective cover, starting a rolling mill and the induction heating device at the same time, and selecting the oscillation frequency of 60-80kHz; the highest temperature T reached by the induction heating titanium plate is established according to the following formula, and the induction heating power is adjusted to ensure that the temperature of the titanium plate is within the range of 700-850 ℃ when the titanium plate moves to a roll gap;
in the formula, T 1 The temperature of the titanium plate at the position of the roll gap is unit ℃; p is induction heating power, unit kW; p b The specific power is in kW/m2 during continuous heating; l is the distance from an induction coil close to the roller end to the roller gap, and is unit m; Δ L is the distance of heat conduction in unit time, in m; k is the coefficient of thermal conductivity, in W/(m.DEG C); b is the width of the titanium plate and the unit m; h is the thickness of the titanium plate and the unit m; q. q.s v Is a heat source in the titanium plate and has the unit of W/m 3 ；
S3, single-roller driving rolling: taking the aluminum plate side roller as a driving roller and the titanium plate side roller as a driven roller, carrying out single-roller driving rolling, pulling the bitten aluminum plate to drive the titanium plate after induction heating into a roller gap, and obtaining the titanium/aluminum composite plate after rolling; the rolling linear velocity of the driving roller in the induction heating process is determined by the following formula:
wherein v is the moving speed of the titanium plate and the unit is m/min; c is a plate moving speed coefficient, and the numerical range is 0.3-0.5; b is the vertical distance between the titanium plate and the induction coil, and the unit is m; p b Specific power in kW/m for continuous heating 2 (ii) a Delta is the skin depth of the titanium plate in the unit of m; q. q.s v Is a heat source in the titanium plate and has a unit of W/m 3 (ii) a t is heating time in min;
s4, atomizing and cooling: carrying out high-pressure spray surface cooling on the rolled titanium/aluminum composite plate to inhibit a compound from being generated at a titanium-aluminum bonding interface due to high temperature;
s5, cutting: and cutting the titanium/aluminum composite board to obtain the finished product of the titanium/aluminum composite board.
2. The method for rolling the titanium/aluminum composite plate by the single-roller driving of the moving induction heating titanium plate according to claim 1, wherein the method comprises the following steps: in the step S1, the titanium plate of the titanium-aluminum assembled plate blank with the gap is selected from any titanium plate, and the aluminum plate is selected from pure aluminum or aluminum alloy plate.
3. The method for rolling the titanium/aluminum composite plate by the single roller driving of the moving induction heating titanium plate as claimed in claim 1, wherein the method comprises the following steps: in the step S1, the rolling front end of the titanium/aluminum plate blank is fixed by adopting a metal wire, and a layer of thin aluminum plate with the same width is additionally attached to the rolling front end of the aluminum plate and is fixed by using an aluminum rivet; wherein, the thickness of the titanium plate is 0.001-0.002m, the thickness of the aluminum plate is 0.004-0.008m, and the thickness of the attached aluminum plate is 0.001m.
4. The method for rolling the titanium/aluminum composite plate by the single-roller driving of the moving induction heating titanium plate according to claim 1, wherein the method comprises the following steps: in the step S2, the induction heating device is a high-frequency induction heating device.
5. The method for rolling the titanium/aluminum composite plate by the single-roller driving of the moving induction heating titanium plate according to claim 1, wherein the method comprises the following steps: and in the step S4, performing high-pressure spray surface cooling on one side of the rolled titanium plate.
6. The method for rolling the titanium/aluminum composite plate by the single roller driving of the moving induction heating titanium plate as claimed in claim 1, wherein the method comprises the following steps: in the step S5, a toothed saw is selected as the cutting mode for cutting.
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