CN116833222A - Titanium/aluminum composite material with high interface bonding strength and rolling composite forming method - Google Patents
Titanium/aluminum composite material with high interface bonding strength and rolling composite forming method Download PDFInfo
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- CN116833222A CN116833222A CN202310751730.4A CN202310751730A CN116833222A CN 116833222 A CN116833222 A CN 116833222A CN 202310751730 A CN202310751730 A CN 202310751730A CN 116833222 A CN116833222 A CN 116833222A
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 239000010936 titanium Substances 0.000 title claims abstract description 178
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 178
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 141
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 239000002131 composite material Substances 0.000 title claims abstract description 122
- 238000005096 rolling process Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 89
- 238000000137 annealing Methods 0.000 claims abstract description 24
- 238000013329 compounding Methods 0.000 claims abstract description 24
- 238000005498 polishing Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 238000005098 hot rolling Methods 0.000 claims abstract description 12
- 238000007709 nanocrystallization Methods 0.000 claims abstract description 12
- -1 aluminum compound Chemical class 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 34
- 238000004321 preservation Methods 0.000 claims description 21
- 230000009467 reduction Effects 0.000 claims description 16
- 238000000227 grinding Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000011859 microparticle Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract description 17
- 150000001875 compounds Chemical class 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 4
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 10
- 238000005336 cracking Methods 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- 229910001250 2024 aluminium alloy Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 244000137852 Petrea volubilis Species 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004093 laser heating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 210000003464 cuspid Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- 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
- 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
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Metal Rolling (AREA)
Abstract
A rolling composite forming method of a titanium/aluminum composite material with high interface bonding strength belongs to the technical field of preparation of metal layered composite materials. The method comprises the following steps: respectively carrying out softening annealing treatment on the titanium plate and the aluminum plate; carrying out surface self-nanocrystallization treatment on the surface to be compounded of the titanium plate, and constructing a gradient nanocrystalline structure layer; carrying out surface mechanical polishing treatment on the surface to be compounded of the aluminum plate; assembling a titanium plate and the aluminum plate to obtain a titanium/aluminum assembled body; rolling and pre-compounding the titanium/aluminum composite plate blank for a single time to obtain a titanium/aluminum pre-compound plate blank; carrying out single-pass hot rolling final compounding on the titanium/aluminum pre-compounded slab to obtain a titanium/aluminum compound slab; and (3) air cooling the titanium/aluminum composite plate blank to room temperature to obtain the titanium/aluminum composite material. According to the technical scheme, the surface to be compounded of the titanium plate can be cracked under lower pressure, the diffusion driving force of interface atoms is increased, and a novel method is provided for preparing the high-interface bonding strength high-performance titanium/aluminum composite material.
Description
Technical Field
The invention belongs to the technical field of preparation of metal layered composite materials, and particularly relates to a titanium/aluminum composite material with high interface bonding strength and a rolling composite forming method.
Background
The titanium/aluminum composite material has the advantages of high specific strength, corrosion resistance, high temperature resistance, low density of aluminum, low cost and the like, is a structure-function integrated metal layered composite material with excellent comprehensive performance, and has wide application in the fields of aerospace, rail transit, construction chemical industry, national defense, military industry, articles for daily use and the like.
The main methods for preparing the titanium/aluminum composite material are an explosion compounding method and a rolling compounding method. The explosion compounding method realizes strong metallurgical bonding between titanium/aluminum interfaces through huge impact force and heat generated by explosion. However, the explosion compounding method has the problems of uneven coating thickness, poor surface quality, large environmental pollution, only being capable of producing titanium/aluminum thick plates and the like, and cannot realize continuous preparation of large-size and large-batch titanium/aluminum composite materials. The rolling composite method has the advantages of simple process, high production efficiency, safety, greenness, capability of producing wide plate strips, continuous mass production and the like, and is the development direction of green forming of the titanium/aluminum composite material. However, as the physical properties and the mechanical properties of titanium and aluminum are greatly different, in the traditional rolling compounding process, the titanium and aluminum are not deformed in coordination, the titanium side is difficult to deform, so that the cracking degree of a surface hardening layer to be compounded of the titanium plate is low, the fresh metal on the titanium side is less exposed, the metal embedding amount on the aluminum side is insufficient, and the interface bonding strength of the titanium/aluminum composite material is low. Therefore, how to improve the cracking degree of the surface to be compounded of the titanium plate in the rolling compounding process and increase the interface bonding area of the dissimilar metals of titanium and aluminum are key to obtaining the titanium/aluminum composite material with high interface bonding strength.
Currently, in order to promote cracking of the surface to be compounded of a component metal layer difficult to deform, researchers adopt means such as oxidation, carburization, nitridation or hydrogenation to modify the surface to be compounded of the component metal so as to embrittle the surface. Although the increase of the thickness of the brittle layer can effectively promote cracking of the surface to be compounded of the component metal in the rolling compounding process, the introduced O, N and other elements can prevent the contact and the element diffusion of fresh metal at the interface of the component metal layer, and brittle compounds formed by external elements and matrix metal are distributed at the interface of the metal layered composite material, so that the interface performance of the metal layered composite material can be reduced. In addition, surface modification means such as oxidization, carburization, nitridation or hydrogenation are usually carried out at a higher temperature for a long time, so that not only is the growth of crystal grains induced, but also the production cost and the process complexity are increased, and the method is not suitable for large-scale popularization and application.
Therefore, a novel method for surface pretreatment-rolling composite forming of the titanium/aluminum composite material with short flow, high efficiency and low cost is developed, and the high-performance titanium/aluminum composite material with high interface bonding strength is obtained, so that the method has very important significance.
Disclosure of Invention
The invention aims to solve the problems of low cracking degree of the surface to be compounded of a titanium plate, low interface bonding strength of the titanium/aluminum composite material and the like in the process of preparing the titanium/aluminum composite material by the traditional rolling composite forming method, combines a surface self-nanocrystallization treatment method with a rolling composite technology, and provides a titanium/aluminum composite material with high interface bonding strength and a rolling composite forming method. Compared with the traditional pretreatment method of the surface to be composited of the titanium plate, the surface self-nanocrystallization treatment method can obtain the surface gradient nanocrystalline structure layer with certain thickness, hardness and roughness by only changing the mechanical property of the surface to be composited of the titanium plate without changing chemical components. The surface of the titanium plate modified by the surface self-nanocrystallization treatment method can be cracked under lower pressure, the diffusion driving force of interface atoms is increased, and a novel method is provided for preparing the high-interface bonding strength high-performance titanium/aluminum composite material.
According to a first aspect of the technical scheme of the invention, the invention discloses a rolling composite forming method of a titanium/aluminum composite material with high interface bonding strength, which is characterized by comprising the following steps:
step 1: respectively carrying out softening annealing treatment on the titanium plate and the aluminum plate;
step 2: carrying out surface self-nanocrystallization treatment on the surface to be compounded of the titanium plate treated in the step 1, and constructing a gradient nanocrystalline structure layer with specific morphology, roughness, hardness and thickness on the surface to be compounded of the titanium plate; carrying out surface mechanical polishing treatment on the surface to be compounded of the aluminum plate treated in the step 1;
step 3: assembling the titanium plate and the aluminum plate treated in the step 2 to obtain a titanium/aluminum assembled body;
step 4: rolling and pre-compounding the titanium/aluminum assembly for a single time to obtain a titanium/aluminum pre-compounded plate blank;
step 5: carrying out single hot rolling final compounding on the titanium/aluminum pre-compounded slab to obtain a titanium/aluminum compound slab;
step 6: and air-cooling the titanium/aluminum composite plate blank to room temperature to obtain the titanium/aluminum composite material.
Further, in the step 1, the titanium plate and the aluminum plate are sheet strips in a single form or sheet strips in a rolled form, the titanium plate is made of at least one of pure titanium or titanium alloy, and the aluminum plate is made of at least one of pure aluminum or aluminum alloy.
Further, in the step 1, the heating temperature of the softening annealing treatment of the titanium plate is 650-850 ℃, the heat preservation time is 30-120 min, and the cooling mode is air cooling; the heating temperature of the softening annealing treatment of the aluminum plate is 400-500 ℃, the heat preservation time is 30-120 min, and the cooling mode is air cooling.
Further, in the step 2, the surface self-nanocrystallization method of the titanium plate is at least one of a surface mechanical grinding method, a mechanical shot blasting method, an ultrasonic shot blasting method, a supersonic microparticle bombardment method, a laser impact method, an ultrasonic impact method, a rapid multiple rotation rolling method, a surface deep rolling method, an ultrasonic rolling method or a surface high-pressure rolling method.
Further, in the step 2, the thickness of the gradient nanocrystalline structure layer is 0.01-150 μm, the roughness is 0.1-10 μm, the grain size of the gradient nanocrystalline is 1-100 nm, the hardness is improved by 5% -300% compared with the hardness of the matrix, and the specific morphology is at least one of mirror surface shape, corrugated shape, groove shape, meteorite shape or grid shape.
Further, in the step 2, the mechanical polishing treatment of the surface of the aluminum plate is at least one of sand paper polishing, louver polishing, wire brush polishing, grinding wheel polishing, diamond grinding wheel polishing or laser polishing.
Further, in the step 3, the titanium/aluminum laminate stack is a titanium/aluminum laminate stack or a titanium/aluminum/titanium laminate stack having 2 to 10 layers.
In the step 4, the rolling speed is less than 0.2m/s, the rolling reduction is 10-50%, and the rolling temperature is room temperature-250 ℃.
In step 5, the heating device adopted by the final combination of single hot rolling is a single-temperature zone heating device or a multi-temperature zone heating device, and the heating mode is at least one of flame heating, induction heating, radiation heating, pulse heating, resistance heating or laser heating.
In step 6, the rolling temperature is 350-450 ℃, the heating time is 5-30 min, the rolling speed is less than 0.2m/s, and the rolling reduction is 10% -50%.
Further, the rolling composite forming method is continuous or discontinuous, and the titanium/aluminum composite material is subjected to subsequent diffusion annealing and straightening.
According to a second aspect of the present invention, there is provided a high interfacial bond strength titanium/aluminum composite material prepared by the method according to any one of the preceding aspects.
The invention has the beneficial effects that:
1. according to the rolling composite forming method of the titanium/aluminum composite material with high interface bonding strength, which is disclosed by the invention, aiming at the problems of insufficient cracking of the surface to be composited and low interface bonding strength of a titanium plate when the titanium/aluminum composite material is prepared by traditional rolling composite forming, the surface self-nanocrystallization treatment method is combined with a rolling composite technology, and by controlling the morphology, roughness, hardness and gradient nanocrystalline structure layer thickness of the surface to be composited of the titanium plate, better selection is provided for reasonably and organically coordinating and matching physical parameters between the surface to be composited of the titanium plate and the aluminum plate, the surface to be composited of the titanium plate can initiate cracks and expand under lower rolling reduction rate, so that metal aluminum is facilitated to be embedded into titanium side cracks, and the interface bonding area is further increased, and the titanium/aluminum composite material with high interface bonding strength is obtained.
2. According to the rolling composite forming method of the titanium/aluminum composite material with high interface bonding strength, a gradient nanocrystalline structure layer is constructed on the surface to be compounded of the titanium plate to provide a rapid channel for the diffusion of atoms in the subsequent heating and hot rolling processes, so that the diffusion of titanium atoms and aluminum atoms can be realized at a lower temperature, the reaction of a titanium/aluminum interface to generate intermetallic compounds which are unfavorable for the high interface bonding strength is avoided, and the problem that the titanium/aluminum composite material with high interface bonding strength is difficult to obtain in the traditional hot rolling composite forming (requiring higher temperature and longer time heating) or cold rolling composite forming (requiring long time diffusion heat treatment in the subsequent process) is solved.
3. The gradient nanocrystalline structure layer at the composite interface of the titanium/aluminum composite material has a synergistic strengthening effect with the coarse grain layer of the titanium plate matrix and the titanium/aluminum composite material interface respectively, so that cracks are prevented from being initiated and expanded at the interface of the titanium/aluminum composite material in the subsequent deep processing process, and the toughness of the titanium/aluminum composite material is further improved.
4. The rolling composite forming method of the titanium/aluminum composite material with high interface bonding strength can be directly carried out in an atmospheric environment, has simple procedures and high production efficiency, can reduce the requirement on the rolling force of equipment, saves energy, reduces consumption, has low production cost, and has higher interface bonding strength and better comprehensive performance.
Drawings
FIG. 1 is a flow chart of a method for roll forming a high interfacial bond strength titanium/aluminum composite material in accordance with aspects of the present invention;
FIG. 2 is an interfacial morphology of a titanium/aluminum composite prepared according to example 1;
FIG. 3 is an interfacial morphology of the titanium/aluminum composite prepared according to comparative example 1.
Detailed Description
The present invention is described in detail below with reference to examples, which are given for further illustration of the present invention only, and should not be construed as limiting the scope of the present invention, since various modifications and adjustments may be made by those skilled in the art in light of the present disclosure.
The technical scheme of the invention provides a rolling composite forming method of a titanium/aluminum composite material with high interface bonding strength, which is shown in figure 1 and comprises the following steps:
step 101: respectively carrying out softening annealing treatment on the titanium plate and the aluminum plate;
step 102: carrying out surface self-nanocrystallization treatment on the surface to be compounded of the titanium plate, and constructing a gradient nanocrystalline structure layer with specific morphology, roughness, hardness and thickness on the surface to be compounded of the titanium plate; carrying out surface mechanical polishing treatment on the surface to be compounded of the aluminum plate;
step 103: performing off-line or on-line assembly on the titanium plate and the aluminum plate to obtain a titanium/aluminum assembly;
step 104: single-pass rolling pre-compounding is carried out on the titanium/aluminum composite plate blank, the rolling speed is less than 0.2m/s, the rolling reduction is 10% -50%, and the rolling temperature is room temperature-250 ℃, so that the titanium/aluminum pre-compound plate blank is obtained;
step 105: carrying out single-pass hot rolling final compounding on the titanium/aluminum pre-compounded slab, wherein the rolling temperature is 350-450 ℃, the heating time is 5-30 min, the rolling speed is less than 0.2m/s, and the rolling reduction is 10% -50%, so as to obtain the titanium/aluminum compounded slab;
step 106: and (3) air cooling the titanium/aluminum composite plate blank to room temperature to obtain the titanium/aluminum composite material.
Further, the titanium plate and the aluminum plate are plate strips in a single form or plate strips in a coiled form, the titanium plate is made of at least one of pure titanium or titanium alloy, and the aluminum plate is made of at least one of pure aluminum or aluminum alloy.
Further, the heating temperature of the softening annealing treatment of the titanium plate is 650-850 ℃, the heat preservation time is 30-120 min, and the cooling mode is air cooling; the heating temperature of the softening annealing treatment of the aluminum plate is 400-500 ℃, the heat preservation time is 30-120 min, and the cooling mode is air cooling.
Further, the surface self-nanocrystallization treatment method of the titanium plate is at least one of a surface mechanical grinding method, a mechanical shot blasting method, an ultrasonic shot blasting method, a supersonic microparticle bombardment method, a laser impact method, an ultrasonic impact method, a rapid multiple rotation rolling method, a surface deep rolling method, an ultrasonic rolling method or a surface high-pressure rolling method.
Further, the thickness of the gradient nanocrystalline structure layer is 0.01-150 μm, the roughness is 0.1-10 μm, the grain size of the gradient nanocrystalline is 1-100 nm, the hardness is improved by 5-300% compared with the hardness of the matrix, and the specific shape is at least one of mirror surface shape, corrugated shape, groove shape, meteorologic shape or grid shape.
Further, the mechanical polishing treatment of the surface of the aluminum plate is at least one of sand paper polishing, louver polishing, steel wire brush polishing, grinding wheel polishing, diamond-impregnated wheel polishing or laser polishing.
Further, the titanium/aluminum laminate is a titanium/aluminum laminate or a titanium/aluminum/titanium laminate having 2 to 10 layers.
Further, the heating equipment adopted by the final combination of single-pass hot rolling is single-temperature zone heating equipment or multi-temperature zone heating equipment, and is off-line heating equipment or on-line heating equipment, and the heating mode is at least one of flame heating, induction heating, radiation heating, pulse heating, resistance heating or laser heating.
Further, the rolling composite forming method is continuous or discontinuous, and the titanium/aluminum composite material is subjected to subsequent diffusion annealing and straightening.
The technical scheme of the invention also provides a high-interface bonding strength titanium/aluminum composite material, which is prepared by adopting the method according to any one of the aspects.
Example 1:
a titanium/aluminum composite material was prepared from a TA1 pure titanium plate in a single form having a thickness of 1mm and a 6061 aluminum alloy plate in a single form having a thickness of 3mm as raw materials.
Step one: respectively carrying out softening annealing treatment on the TA1 pure titanium plate and the 6061 aluminum alloy plate, wherein the softening annealing temperature of the TA1 pure titanium plate is 750 ℃, the heat preservation time is 30min, the softening annealing temperature of the 6061 aluminum alloy plate is 450 ℃, and the heat preservation time is 60min;
step two: carrying out ultrasonic shot blasting treatment on the surface to be composited of the TA1 pure titanium plate, removing surface pollutants and an oxide layer, and constructing a gradient nanocrystalline structure layer with certain roughness and thickness, wherein the shot blasting time is 60 seconds, the shot diameter is 3mm, and the amplitude is 40 mu m; grinding the 6061 aluminum alloy surface to be compounded by adopting a grinding wheel to remove a surface oxide layer and pollutants to obtain a clean and rough surface to be compounded;
step three: stacking the TA1 pure titanium plate and the 6061 aluminum alloy plate subjected to surface pretreatment in an up-down stacking manner to obtain a TA1/6061 assembly;
step four: carrying out single-pass rolling compounding on the TA1/6061 assembly at room temperature, wherein the rolling speed is 0.04m/s, and the rolling reduction is 45%, so as to obtain a TA1/6061 pre-compound plate blank;
step five: carrying out 400 ℃/10min heat preservation on the TA1/6061 pre-composite slab in an air atmosphere heat preservation furnace, and immediately carrying out single-pass hot rolling final composite, wherein the rolling speed is 0.04m/s, and the rolling reduction is 25%, so as to obtain the TA1/6061 composite slab;
step six: and (3) air cooling the TA1/6061 composite plate blank to room temperature to obtain the titanium/aluminum composite material with high interface bonding strength. The titanium side of the titanium/aluminum composite material interface is obviously cracked, the cracks are uniformly distributed along the interface, the width and depth of the cracks are large, metal aluminum is embedded into the cracks on the titanium side, and the interface presents a 'canine tooth staggered' shape, as shown in figure 2.
Example 2:
a TA1 pure titanium plate in a single sheet form with the thickness of 1mm and a 1060 pure aluminum plate in a single sheet form with the thickness of 3mm are taken as raw materials to prepare the titanium/aluminum/titanium composite material.
Step one: respectively carrying out softening annealing treatment on the TA1 pure titanium plate and the 1060 pure aluminum plate, wherein the softening annealing temperature of the TA1 pure titanium plate is 750 ℃, the heat preservation time is 30min, the softening annealing temperature of the 1060 pure aluminum plate is 450 ℃, and the heat preservation time is 60min;
step two: carrying out surface mechanical grinding treatment on the surface to be compounded of the TA1 pure titanium plate, removing surface pollutants and an oxide layer, and constructing a gradient nanocrystalline structure layer with certain roughness and thickness, wherein the vibration frequency is 50Hz, the diameter of a projectile is 3mm, the vibration distance is 35mm, and the vibration time is 15min; polishing the surface to be compounded of the 1060 pure aluminum plate by adopting a grinding wheel, and removing a surface oxide layer and pollutants to obtain a clean and rough surface to be compounded;
step three: carrying out lamination group blank on the TA1 pure titanium plate and the 1060 pure aluminum plate subjected to surface pretreatment in a TA1/1060/TA1 mode to obtain a TA1/1060/TA1 group blank;
step four: carrying out single-pass rolling compounding on the TA1/1060/TA1 assembly at room temperature, wherein the rolling speed is 0.04m/s, and the rolling reduction rate is 50%, so as to obtain a TA1/1060/TA1 pre-compound plate blank;
step five: carrying out 400 ℃/10min heat preservation on the TA1/1060/TA1 pre-composite assembly in an air atmosphere heat preservation furnace, and immediately carrying out single-pass hot rolling final composite, wherein the rolling speed is 0.04m/s, and the rolling reduction is 25%, so as to obtain a TA1/1060/TA1 composite slab;
step six: and (3) air cooling the TA1/1060/TA1 composite slab to room temperature to obtain the titanium/aluminum/titanium composite material.
Example 3:
a titanium/aluminum composite material was prepared from a TC4 titanium alloy plate in a sheet form having a thickness of 1.5mm and a 2024 aluminum alloy plate in a sheet form having a thickness of 3mm as raw materials.
Step one: respectively carrying out softening annealing treatment on the TC4 titanium alloy plate and the 2024 aluminum alloy plate, wherein the softening annealing temperature of the TC4 titanium alloy plate is 780 ℃, the heat preservation time is 30min, the softening annealing temperature of the 2024 aluminum alloy plate is 450 ℃, and the heat preservation time is 60min;
step two: carrying out rapid rotary multiple rolling treatment on the surface to be compounded of the TC4 titanium alloy plate, removing surface pollutants and an oxide layer, and constructing a gradient nanocrystalline structure layer with certain roughness and thickness, wherein the treatment time is 30min, the pressure is 4.0MPa, the sample speed is 2.0mm/s, and the tool head rotating speed is 1400r/min; polishing the 2024 aluminum alloy surface to be compounded by adopting a grinding wheel, and removing a surface oxide layer and pollutants to obtain a clean and rough surface to be compounded;
step three: stacking the TC4 titanium alloy plate and the 2024 aluminum alloy plate subjected to surface pretreatment in an up-down stacking manner to obtain a TC4/2024 assembly;
step four: carrying out single-pass rolling compounding on the TA1/2024 blank after heat preservation at 200 ℃/10min, wherein the rolling speed is 0.04m/s, and the rolling reduction is 45%, so as to obtain a TA1/2024 pre-compound blank;
step five: carrying out 400 ℃/10min heat preservation on the TA1/2024 pre-composite slab in an air atmosphere heat preservation furnace, and immediately carrying out single-pass hot rolling final composite, wherein the rolling speed is 0.04m/s, and the rolling reduction is 30%, so as to obtain the TA1/2024 composite slab;
step six: and (3) air cooling the TA1/2024 composite plate blank to room temperature to obtain the titanium/aluminum composite material with high interface bonding strength.
Comparative example:
a TA1 pure titanium plate in a single sheet form with the thickness of 1mm and a 6061 aluminum alloy plate in a single sheet form with the thickness of 3mm are used as raw materials, and the titanium/aluminum composite material is prepared by a traditional mechanical polishing mode.
Step one: respectively carrying out softening annealing treatment on the TA1 pure titanium plate and the 6061 aluminum alloy plate, wherein the annealing degree of the TA1 pure titanium plate is 750 ℃ and is kept for 30min, and the annealing degree of the 6061 aluminum alloy plate is 450 ℃ and is kept for 60min;
step two: grinding the surface to be compounded of the TA1 pure titanium plate by adopting a grinding wheel to remove surface pollutants and an oxide layer; grinding the 6061 aluminum alloy surface to be compounded by adopting a grinding wheel to remove a surface oxide layer and pollutants to obtain a clean and rough surface to be compounded;
step three: assembling the TA1 pure titanium plate and the 6061 aluminum alloy plate subjected to surface pretreatment in a vertically stacked mode to obtain a TA1/6061 assembly;
step four: carrying out single-pass rolling compounding on the TA1/6061 assembly at room temperature, wherein the rolling speed is 0.04m/s, and the rolling reduction is 45%, so as to obtain a TA1/6061 pre-compound plate blank;
step five: carrying out 400 ℃/10min heat preservation on the TA1/6061 pre-composite slab in an air atmosphere heat preservation furnace, and immediately carrying out single-pass hot rolling final composite, wherein the rolling speed is 0.04m/s, and the rolling reduction is 25%, so as to obtain the TA1/6061 composite slab;
step six: and (3) air cooling the TA1/6061 composite slab to room temperature to obtain the titanium/aluminum composite material. The titanium side of the titanium/aluminum composite material interface is not obviously split, and the interface is straight, as shown in figure 3.
In summary, the invention provides a titanium/aluminum composite material with high interface bonding strength and a rolling composite forming method, which adopts a surface self-nanocrystallization treatment method to modify the surface to be composited of a titanium plate with high energy, constructs a gradient nanocrystalline structure layer with special morphology, roughness, hardness and thickness, improves the cracking degree of the surface to be composited of the titanium plate in the rolling process, increases the bonding area of fresh metal, accumulates a large number of defects on the surface to be composited of the titanium plate, provides a rapid channel for atom diffusion in the subsequent heat treatment process, realizes the efficient diffusion of atoms at lower temperature, and improves the interface bonding strength of the titanium/aluminum composite material. The method solves the problems of insufficient cracking of the surface to be compounded of the titanium plate, lower interface bonding strength and the like in the traditional rolling and compounding preparation of the titanium/aluminum composite material, and can prepare the titanium/aluminum composite material with high interface bonding strength under lower rolling reduction and lower diffusion heat treatment temperature.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, and the scope of the claims of the present invention should be covered.
Claims (10)
1. The rolling composite forming method of the titanium/aluminum composite material with high interface bonding strength is characterized by comprising the following steps of:
step 1: respectively carrying out softening annealing treatment on the titanium plate and the aluminum plate;
step 2: carrying out surface self-nanocrystallization treatment on the surface to be compounded of the titanium plate treated in the step 1, and constructing a gradient nanocrystalline structure layer with specific morphology, roughness, hardness and thickness on the surface to be compounded of the titanium plate; carrying out surface mechanical polishing treatment on the surface to be compounded of the aluminum plate treated in the step 1;
step 3: assembling the titanium plate and the aluminum plate treated in the step 2 to obtain a titanium/aluminum assembled body;
step 4: rolling and pre-compounding the titanium/aluminum assembly for a single time to obtain a titanium/aluminum pre-compounded plate blank;
step 5: carrying out single hot rolling final compounding on the titanium/aluminum pre-compounded slab to obtain a titanium/aluminum compound slab;
step 6: and air-cooling the titanium/aluminum composite plate blank to room temperature to obtain the titanium/aluminum composite material.
2. The method for rolling and compounding the titanium/aluminum composite material with high interface bonding strength according to claim 1, wherein in the step 1, the titanium plate and the aluminum plate are plate strips in a single sheet form or plate strips in a rolled form, the titanium plate is made of at least one of pure titanium or titanium alloy, and the aluminum plate is made of at least one of pure aluminum or aluminum alloy.
3. The method for rolling and compounding the titanium/aluminum composite material with high interface bonding strength according to claim 1, wherein in the step 1, the heating temperature of the softening annealing treatment of the titanium plate is 650-850 ℃, the heat preservation time is 30-120 min, and the cooling mode is air cooling; the heating temperature of the softening annealing treatment of the aluminum plate is 400-500 ℃, the heat preservation time is 30-120 min, and the cooling mode is air cooling.
4. The rolling composite forming method of high interfacial bonding strength titanium/aluminum composite material according to claim 1, wherein in the step 2, the surface self-nanocrystallization treatment method of the titanium plate is at least one of a surface mechanical grinding method, a mechanical shot blasting method, an ultrasonic shot blasting method, a supersonic microparticle bombardment method, a laser impact method, an ultrasonic impact method, a rapid multiple rotation rolling method, a surface deep rolling method, an ultrasonic rolling method or a surface high pressure rolling method.
5. The rolling composite forming method of high interface bonding strength titanium/aluminum composite material according to claim 1, wherein in the step 2, the gradient nanocrystalline structure layer has a thickness of 0.01-150 μm, a roughness of 0.1-10 μm, a grain size of 1-100 nm, a hardness 5% -300% higher than that of the matrix, and a specific morphology is at least one of mirror-like, corrugated, grooved, meteorologic or latticed.
6. The method for rolling and compounding the titanium/aluminum composite material with high interfacial bonding strength according to claim 1, wherein in the step 4, the rolling speed is less than 0.2m/s, the rolling reduction is 10-50%, and the rolling temperature is room temperature-250 ℃.
7. The method for roll forming a titanium/aluminum composite material with high interfacial bond strength according to claim 1, wherein in the step 3, the titanium/aluminum composite material is a titanium/aluminum laminated composite material with 2-10 layers or a titanium/aluminum/titanium laminated composite material.
8. The method for rolling and compounding the titanium/aluminum composite material with high interfacial bonding strength according to claim 1, wherein in the step 6, the rolling temperature is 350-450 ℃, the heating time is 5-30 min, the rolling speed is less than 0.2m/s, and the rolling reduction is 10% -50%.
9. The method for roll forming a high interfacial bond strength titanium/aluminum composite material as recited in claim 1, wherein the roll forming process is continuous or discontinuous, and wherein the titanium/aluminum composite material is subsequently diffusion annealed and straightened.
10. A high interfacial bond strength titanium/aluminum composite material, characterized in that the high interfacial bond strength titanium/aluminum composite material is prepared using the roll composite forming method according to any one of claims 1 to 9.
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| CN117400603A (en) * | 2023-12-13 | 2024-01-16 | 内蒙金属材料研究所 | High-speed impact resistant laminated titanium alloy plate and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117400603A (en) * | 2023-12-13 | 2024-01-16 | 内蒙金属材料研究所 | High-speed impact resistant laminated titanium alloy plate and preparation method thereof |
| CN117400603B (en) * | 2023-12-13 | 2024-02-09 | 内蒙金属材料研究所 | High-speed impact resistant laminated titanium alloy plate and preparation method thereof |
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