CN103521918A - Method for preparing Ti-TiBw/Ti laminar composite material in diffusion welding mode - Google Patents

Method for preparing Ti-TiBw/Ti laminar composite material in diffusion welding mode Download PDF

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CN103521918A
CN103521918A CN201310498988.4A CN201310498988A CN103521918A CN 103521918 A CN103521918 A CN 103521918A CN 201310498988 A CN201310498988 A CN 201310498988A CN 103521918 A CN103521918 A CN 103521918A
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tibw
temperature
composite
foil
take
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CN103521918B (en
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耿林
刘宝玺
黄陆军
崔喜平
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Harbin Institute of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/001—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by extrusion or drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/24—Preliminary treatment
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/058—Mixtures of metal powder with non-metallic powder by reaction sintering (i.e. gasless reaction starting from a mixture of solid metal compounds)
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/14—Titanium or alloys thereof

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  • Chemical & Material Sciences (AREA)
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Abstract

The invention relates to a method for preparing a Ti-TiBw/Ti composite material of a laminar structure, in particular to a method for preparing the Ti-TiBw/Ti laminar composite material in a diffusion welding mode. The method for preparing the Ti-TiBw/Ti laminar composite material in the diffusion welding mode solves the technical problem that the flatness and uniformity of an exiting laminar titanium matrix composite material layer are difficult to guarantee, and comprises the steps of weighing raw materials, preparing Ti-TiBw/Ti composite material, preparing Ti-TiBw/Ti composite material foils, and preparing the Ti-TiBw/Ti laminar composite material. The Ti-TiBw/Ti laminar composite material prepared through the method has good flatness and uniformity and is high in compactness, the compactness can reach 99.3%, the high plasticity and strengthening-toughening performance of the laminar material can be controlled by adjusting the thickness of a Ti board, the thickness of a Ti-TiBw/Ti composite material board, the layer thickness ratio between the Ti board and the Ti-TiBw/Ti composite material board, and the volume fraction of an enhanceosome, and breaking tenacity of the Ti-TiBw/Ti laminar composite material is largely improved.

Description

Diffusion Welding is prepared the method for Ti-TiBw/Ti laminar composite
Technical field
The present invention relates to a kind of preparation method with the Ti-TiBw/Ti composite of layer structure.
Background technology
Ti based composites is high-strength light structural material 21 century with very big development potentiality, but when adding reinforcement, tends to plasticity and the toughness of expendable material.And layer structure material is at the obdurability of performance material with by force bringing into play very significant effect aspect plasticity.This is that fragility mutually layer plays the effect of strengthening and delay localized necking because general layer structure comprises fragility layer and plasticity phase layer mutually, and plasticity mutually layer can absorb a large amount of work of deformations in plastic history, and plays the effect of crack blunting and crack deflection.
The traditional handicraft of preparation stratiform titanium matrix composite has rolling compound at present, hot pressed sintering, thermal spraying, surface overlaying and consumable arc-melting method, yet in preparation process, but there is being difficult to planarization and the inhomogeneity problem of key-course, industrial production and the basic research of layered titanium based composites have been limited greatly, in addition, because hot pressed sintering obtains material bed thickness between submillimeter rank, and micron and the material of submicron-scale can obtain and strengthen more significantly effect, therefore prepare the development trend that multiple dimensioned laminar composite becomes 21 century structural material.
Summary of the invention
The present invention is difficult to for solving planarization and the uniformity of existing stratiform titanium matrix composite layer the technical problem guaranteeing, and provides a kind of Diffusion Welding to prepare the method for Ti-TiBw/Ti laminar composite.
Diffusion Welding of the present invention is prepared the method for Ti-TiBw/Ti laminar composite and is carried out according to the following steps:
One, take raw material: take Ti foil, Spherical Ti Powder and reinforcement material; Described Ti foil and the mass ratio of Spherical Ti Powder are 1:(1～3), described Ti foil and the mass ratio of reinforcement material are 100:(3～8), described reinforcement material is to generate with Ti reaction in-situ simple substance powder or the compound powder of particle, whisker; Described can be 3 μ m～8 μ m with Ti reaction in-situ generation particle, the simple substance powder of whisker or the particle diameter of compound powder; The thickness of described Ti foil is 50 μ m～500 μ m; The particle diameter of described Spherical Ti Powder is 80 μ m～200 μ m;
Two, then the preparation of TiBw/Ti composite: the Spherical Ti Powder that step 1 is taken and reinforcement material be take ratio of grinding media to material as 5:1 ball milling 5h～8h is 4 * 10 in vacuum -2pa～8 * 10 -2pa lacks under unit condition, first by room temperature, being warming up to temperature is 300～500 ℃, and be to be incubated 30min～60min at 300～500 ℃ in temperature, then the speed of 10 ℃/min～20 ℃/min of take is at the uniform velocity warming up to temperature as 1100～1300 ℃ by temperature as 300～500 ℃, simultaneously pressure be take the speed of 0.6MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 15MPa～30MPa by normal pressure, and be to keep 1h～2h under 1100～1300 ℃ and the pressure condition that is 15MPa～30MPa in temperature, by temperature, being 1100～1300 ℃ again, to be cooled to temperature be 700～900 ℃, pressure release, obtain TiBw/Ti composite, its reaction in-situ chemical equation is: Ti+TiB 2→ TiBw,
Three, the preparation of TiBw/Ti composite foil: the TiBw/Ti composite material line that step 2 is obtained is cut to the foil that thickness is 200 μ m～500 μ m, then the HF solution etch that is 5%～10% by mass concentration surface, obtaining thickness is the TiBw/Ti composite foil of 100 μ m～400 μ m;
Four, the preparation of stratiform Ti-TiBw/Ti composite: the Ti foil that the TiBw/Ti composite foil that step 3 is obtained and step 1 take is 4 * 10 in vacuum -2pa～8 * 10 -2under the condition of Pa, first by room temperature, being warming up to temperature is 300～500 ℃, and be to be incubated 30min～60min at 300～500 ℃ in temperature, then the speed of 10 ℃/min～20 ℃/min of take is at the uniform velocity warming up to temperature as 1000～1200 ℃ by temperature as 300～500 ℃, simultaneously pressure be take the speed of 0.6MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 15MPa～30MPa by normal pressure, and be to keep 1h～2h under 1000～1200 ℃ and the pressure condition that is 15MPa～30MPa in temperature, by temperature, being 1000～1200 ℃ again, to be cooled to temperature be 400～500 ℃, pressure release, obtain stratiform Ti-TiBw/Ti composite, the Thickness Ratio of the Ti foil that the TiBw/Ti composite foil that described step 3 obtains and step 1 take is 3:(1～5).
The present invention has utilized Ti and TiBw/Ti composite board good plastic deformation ability and atom diffusivity under 700～1000 ℃ of high temperature, order combination is between the two good, thereby can obtain higher density (measure with Archimedes's drainage, density is 99.3%).By adjusting the thickness of Ti plate, TiBw/Ti composite board and the volume fraction of the ratio of bed thickness between the two and reinforcement, can realize the control of the strong plasticity of stratified material and Strengthening and Toughening.With respect to pure titanium matrix, optimization is mentioned in the plastic deformation of micro-laminated material, presents higher work hardening rate.The existence of TiBw/Ti composite can postpone the early stage constriction of Ti flaggy, can improve the uniform plastic deformation ability of material monolithic, Ti layer is different at sintering process thermal coefficient of expansion with TiBw/Ti composite layer simultaneously, can make TiBw/Ti composite layer produce larger residual compressive stress, crackle can produce deflecting effect under the effect of compression, this will consume certain work to break, interlayer faults will make crack path greatly extend simultaneously, and this all can make the fracture toughness of Ti-TiBw/Ti laminar composite obtain larger raising.In addition, also occurred secondary cracks and tunnel seminess in Ti-TiBw/Ti Tensile Fracture Process, this has also improved the fracture toughness of material greatly.
Accompanying drawing explanation
Fig. 1 is the electron microscope photo scanning of test one; In wherein scheming a), 1 for Ti-TiBw composite layer, and figure 2 is Ti layer in a); Figure b) be the partial enlarged drawing at c place in scheming a), its scale is 100 μ m; Wherein d is TiBw, and e is Ti;
Fig. 2 is the electron microscope photo scanning of test two; Wherein a is interlayer faults, and b is crack deflection, and c is tunnel crackle;
Fig. 3 is the stress-strain curve diagram of test four; Wherein 1 is and the TiBw/Ti composite of 5vol.%, the 2 stratiform Ti-TiBw/Ti composites that obtain for embodiment 2, and 3 is pure Ti.
The specific embodiment
Technical scheme of the present invention is not limited to the following specific embodiment, also comprises any combination between each specific embodiment.
The specific embodiment one: the Diffusion Welding of present embodiment is prepared the method for Ti-TiBw/Ti laminar composite and carried out according to the following steps:
One, take raw material: take Ti foil, Spherical Ti Powder and reinforcement material; Described Ti foil and the mass ratio of Spherical Ti Powder are 1:(1～3), described Ti foil and the mass ratio of reinforcement material are 100:(3～8), described reinforcement material is to generate with Ti reaction in-situ simple substance powder or the compound powder of particle, whisker; Described can be 3 μ m～8 μ m with Ti reaction in-situ generation particle, the simple substance powder of whisker or the particle diameter of compound powder; The thickness of described Ti foil is 50 μ m～500 μ m; The particle diameter of described Spherical Ti Powder is 80 μ m～200 μ m;
Two, then the preparation of TiBw/Ti composite: the Spherical Ti Powder that step 1 is taken and reinforcement material be take ratio of grinding media to material as 5:1 ball milling 5h～8h is 4 * 10 in vacuum -2pa～8 * 10 -2pa lacks under unit condition, first by room temperature, being warming up to temperature is 300～500 ℃, and be to be incubated 30min～60min at 300～500 ℃ in temperature, then the speed of 10 ℃/min～20 ℃/min of take is at the uniform velocity warming up to temperature as 1100～1300 ℃ by temperature as 300～500 ℃, simultaneously pressure be take the speed of 0.6MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 15MPa～30MPa by normal pressure, and be to keep 1h～2h under 1100～1300 ℃ and the pressure condition that is 15MPa～30MPa in temperature, by temperature, being 1100～1300 ℃ again, to be cooled to temperature be 700～900 ℃, pressure release, obtain TiBw/Ti composite, its reaction in-situ chemical equation is: Ti+TiB 2→ TiBw,
Three, the preparation of TiBw/Ti composite foil: the TiBw/Ti composite material line that step 2 is obtained is cut to the foil that thickness is 200 μ m～500 μ m, then the HF solution etch that is 5%～10% by mass concentration surface, obtaining thickness is the TiBw/Ti composite foil of 100 μ m～400 μ m;
Four, the preparation of stratiform Ti-TiBw/Ti composite: the Ti foil that the TiBw/Ti composite foil that step 3 is obtained and step 1 take is 4 * 10 in vacuum -2pa～8 * 10 -2under the condition of Pa, first by room temperature, being warming up to temperature is 300～500 ℃, and be to be incubated 30min～60min at 300～500 ℃ in temperature, then the speed of 10 ℃/min～20 ℃/min of take is at the uniform velocity warming up to temperature as 1000～1200 ℃ by temperature as 300～500 ℃, simultaneously pressure be take the speed of 0.6MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 15MPa～30MPa by normal pressure, and be to keep 1h～2h under 1000～1200 ℃ and the pressure condition that is 15MPa～30MPa in temperature, by temperature, being 1000～1200 ℃ again, to be cooled to temperature be 400～500 ℃, pressure release, obtain stratiform Ti-TiBw/Ti composite, the Thickness Ratio of the Ti foil that the TiBw/Ti composite foil that described step 3 obtains and step 1 take is 3:(1～5).
Present embodiment has been utilized Ti and TiBw/Ti composite board good plastic deformation ability and atom diffusivity under 700～1000 ℃ of high temperature, order combination is between the two good, thereby can obtain higher density (measure with Archimedes's drainage, density is 99.3%).By adjusting the thickness of Ti plate, TiBw/Ti composite board and the volume fraction of the ratio of bed thickness between the two and reinforcement, can realize the control of the strong plasticity of stratified material and Strengthening and Toughening.With respect to pure titanium matrix, optimization is mentioned in the plastic deformation of micro-laminated material, presents higher work hardening rate.The existence of TiBw/Ti composite can postpone the early stage constriction of Ti flaggy, can improve the uniform plastic deformation ability of material monolithic, Ti layer is different at sintering process thermal coefficient of expansion with TiBw/Ti composite layer simultaneously, can make TiBw/Ti composite layer produce larger residual compressive stress, crackle can produce deflecting effect under the effect of compression, this will consume certain work to break, interlayer faults will make crack path greatly extend simultaneously, and this all can make the fracture toughness of Ti-TiBw/Ti laminar composite obtain larger raising.In addition, also occurred secondary cracks and tunnel seminess in Ti-TiBw/Ti Tensile Fracture Process, this has also improved the fracture toughness of material greatly.
The specific embodiment two: present embodiment is different from the specific embodiment one: described in step 1 can be TiB with simple substance powder or the compound powder of Ti reaction in-situ generation particle, whisker 2powder, C powder, B 4c powder or BN powder.Other step and parameter are identical with the specific embodiment one.
TiB in present embodiment 2powder, C powder, B 4c powder and BN powder are to generate with Ti reaction in-situ simple substance powder or the compound powder of particle, whisker.
The specific embodiment three: present embodiment is different from the specific embodiment one or two: the mass ratio of the Ti foil described in step 1 and Spherical Ti Powder is 1:2.Other step and parameter are identical with the specific embodiment one or two.
The specific embodiment four: present embodiment is different from one of specific embodiment one to three: the mass ratio of the Ti foil described in step 1 and reinforcement material is 100:4.Other step and parameter are identical with one of specific embodiment one to three.
The specific embodiment five: present embodiment is different from one of specific embodiment one to four: being first warming up to temperature by room temperature in rapid two is 400 ℃, and is to be incubated 50min～60min at 400 ℃ in temperature.Other step and parameter are identical with one of specific embodiment one to four.
The specific embodiment six: present embodiment is different from the specific embodiment five: the speed of 15 ℃/min of take in step 2 is at the uniform velocity warming up to temperature as 1200 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and be to keep 1.5h～2h under 1200 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1200 ℃, to be cooled to temperature be 800 ℃.Other step and parameter are identical with the specific embodiment five.
The specific embodiment seven: present embodiment is different from one of specific embodiment one to six: in step 2, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure.Other step and parameter are identical with one of specific embodiment one to six.
The specific embodiment eight: present embodiment is different from one of specific embodiment one to seven: the TiBw/Ti composite material line in step 3, step 2 being obtained is cut to the foil that thickness is 400 μ m.Other step and parameter are identical with one of specific embodiment one to seven.
The specific embodiment nine: present embodiment is different from the specific embodiment eight: it is 400 ℃ that the Ti foil that the TiBw/Ti composite foil in step 4, step 3 being obtained and step 1 take is first warming up to temperature by room temperature, and is to be incubated 50min～60min at 400 ℃ in temperature.Other step and parameter are identical with the specific embodiment eight.
The specific embodiment ten: present embodiment is different from one of specific embodiment one to nine: the speed of 15 ℃/min of then take in step 4 is at the uniform velocity warming up to temperature as 1100 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and be to keep 1.5h～2h under 1100 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1100 ℃, to be cooled to temperature be 450 ℃.Other step and parameter are identical with one of specific embodiment one to nine.
The specific embodiment 11: present embodiment is different from one of specific embodiment one to ten: in step 4, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and other step and parameter are identical with one of specific embodiment one to ten.
The specific embodiment 12: present embodiment is different from one of specific embodiment one to 11: the Thickness Ratio of the Ti foil that the TiBw/Ti composite foil that the step 3 described in step 4 obtains and step 1 take is 3:(4～5).Other step and parameter are identical with one of specific embodiment one to 11.
With following verification experimental verification beneficial effect of the present invention:
Embodiment 1, Diffusion Welding are prepared the method for Ti-TiBw/Ti laminar composite and are carried out according to the following steps:
One, take raw material: the Ti foil, the Spherical Ti Powder of 200g and the TiB of 8g that take 200g 2powder; Described TiB 2powder average out to 5 μ m; The thickness of described Ti foil is 500 μ m; The particle diameter average out to 100 μ m of described Spherical Ti Powder;
Two, then the preparation of TiBw/Ti composite: the 200g Spherical Ti Powder that step 1 is taken and 8g reinforcement material be take ratio of grinding media to material as 5:1 ball milling 8h is 4 * 10 in vacuum -2under the condition of Pa, first by room temperature, being warming up to temperature is 400 ℃, and be to be incubated 45min at 400 ℃ in temperature, then the speed of 15 ℃/min of take is at the uniform velocity warming up to temperature as 1200 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPamin and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and is to keep 1.5h under 1200 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1200 ℃, to be cooled to temperature be 800 ℃, pressure release, obtains TiBw/Ti composite; Its reaction in-situ chemical equation is: Ti+TiB 2→ TiBw;
Three, the preparation of TiBw/Ti composite foil: the TiBw/Ti composite material line that step 2 is obtained is cut to the foil that thickness is 350 μ m, then the HF solution etch that is 5% by mass concentration surface, obtaining thickness is the TiBw/Ti composite foil of 300 μ m;
Four, the preparation of stratiform Ti-TiBw/Ti composite: the Ti foil that the TiBw/Ti composite foil that step 3 is obtained and step 1 take is 4 * 10 in vacuum -2under the condition of Pa, first by room temperature, being warming up to temperature is 400 ℃, and be to be incubated 45min at 400 ℃ in temperature, then the speed of 15 ℃/min of take is at the uniform velocity warming up to temperature as 1100 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and is to keep 1.5h under 1100 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1100 ℃, to be cooled to temperature be 450 ℃, pressure release, obtains stratiform Ti-TiBw/Ti composite.
Test one, the model that adopts U.S. FEI Co. to produce are (Pleasanton, CA) the stratiform Ti-TiBw/Ti composite that the SEM of S-3000N obtains embodiment 1 carries out electron-microscope scanning, obtain electron microscope photo scanning as shown in Figure 1, in wherein scheming a), 1 for Ti-TiBw composite layer, and figure 2 is Ti layer in a); Figure b) be the partial enlarged drawing at c place in scheming a), its scale is 100 μ m; Wherein d is TiBw, and e is Ti; In Fig. 1, a) figure can find out pure titanium layer and TiBw/Ti composite layer.By figure b) can find out figure b) in mark TiBw and Ti, wherein that arrow representative is reinforcement TiBw, it is network structure and is distributed in Ti matrix, netted inside is Ti matrix.
The stratiform Ti-TiBw/Ti composite that the universal electrical tensile testing machine that test two, employing model are Instron-5509 obtains embodiment 1 is broken, then adopting model is (Pleasanton, CA) SEM of S-3000N scans fracture, obtains mechanical performance index and the electron microscope photo scanning of the Ti-TiBw/Ti laminar composite of embodiment 1 preparation; Mechanical performance index is: can obtain the tensile strength of 651MPa and 14.7% percentage elongation, tensile strength is far away higher than pure titanium (482MPa), and percentage elongation is compared pure titanium (17.5%) and reduced less; Electron microscope photo scanning as shown in Figure 2; Wherein a is interlayer faults, and b is crack deflection, and c is tunnel crackle; There are as seen from Figure 2 lamination and tunnel crackle.
Test three, Ti-TiBw/Ti laminar composite prepared by embodiment 1 carry out the sample that line is cut into 5mm * 5mm * 5mm, rear polishing, polishing, adopt Archimedes's drainage to carry out density detection, show that the density of Ti-TiBw/Ti laminar composite prepared by embodiment 1 is up to 99.3%.
Embodiment 2, Diffusion Welding are prepared the method for Ti-TiBw/Ti laminar composite and are carried out according to the following steps:
One, take raw material: the Ti foil, the Spherical Ti Powder of 200g and the TiB of 8g that take 200g 2powder; Described TiB 2powder average out to 5 μ m; The thickness of described Ti foil is 500 μ m; The particle diameter average out to 100 μ m of described Spherical Ti Powder;
Two, then the preparation of TiBw/Ti composite: the 200g Spherical Ti Powder that step 1 is taken and 8g reinforcement material be take ratio of grinding media to material as 5:1 ball milling 8h is 4 * 10 in vacuum -2under the condition of Pa, first by room temperature, being warming up to temperature is 400 ℃, and be to be incubated 45min at 400 ℃ in temperature, then the speed of 15 ℃/min of take is at the uniform velocity warming up to temperature as 1200 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and is to keep 1.5h under 1200 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1200 ℃, to be cooled to temperature be 800 ℃, pressure release, obtains TiBw/Ti composite; Its reaction in-situ chemical equation is: Ti+TiB 2→ TiBw;
Three, the preparation of TiBw/Ti composite foil: the TiBw/Ti composite material line that step 2 is obtained is cut to the foil that thickness is 550 μ m, then the HF solution etch that is 5% by mass concentration surface, obtaining thickness is the TiBw/Ti composite foil of 500 μ m;
Four, the preparation of stratiform Ti-TiBw/Ti composite: the Ti foil that the TiBw/Ti composite foil that step 3 is obtained and step 1 take is 4 * 10 in vacuum -2under the condition of Pa, first by room temperature, being warming up to temperature is 400 ℃, and be to be incubated 45min at 400 ℃ in temperature, then the speed of 15 ℃/min of take is at the uniform velocity warming up to temperature as 1100 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and is to keep 1.5h under 1100 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1100 ℃, to be cooled to temperature be 450 ℃, pressure release, obtains stratiform Ti-TiBw/Ti composite.
Test four, adopt the stratiform Ti-TiBw/Ti composite (Ti layer and TiBw/Ti thickness of composite material are 500 μ m) that universal electrical tensile testing machine that model is Instron-5509 obtains embodiment 2 to break, the stress-strain curve diagram that the TiBw/Ti composite of the pure T that is simultaneously 1mm by thickness and 5vol.% is broken the Ti-TiBw/Ti laminar composite that obtains in contrast embodiment 2 preparations as shown in Figure 3; Wherein 1 is and the TiBw/Ti composite of 5vol.%, the 2 stratiform Ti-TiBw/Ti composites that obtain for embodiment 2,3 is pure Ti, the stratiform Ti-TiBw/Ti composite of preparation has higher percentage elongation as seen from Figure 3, far away higher than the TiBw/Ti composite (7.2%) of 5vol.%, and can keep higher work hardening rate.This be pure titanium material can not than.

Claims (10)

1. Diffusion Welding is prepared the method for Ti-TiBw/Ti laminar composite, it is characterized in that Diffusion Welding prepares the method for Ti-TiBw/Ti laminar composite and carry out according to the following steps:
One, take raw material: take Ti foil, Spherical Ti Powder and reinforcement material; Described Ti foil and the mass ratio of Spherical Ti Powder are 1:(1～3), described Ti foil and the mass ratio of reinforcement material are 100:(3～8), described reinforcement material is to generate with Ti reaction in-situ simple substance powder or the compound powder of particle, whisker; Described can be 3 μ m～8 μ m with Ti reaction in-situ generation particle, the simple substance powder of whisker or the particle diameter of compound powder; The thickness of described Ti foil is 50 μ m～500 μ m; The particle diameter of described Spherical Ti Powder is 80 μ m～200 μ m;
Two, then the preparation of TiBw/Ti composite: the Spherical Ti Powder that step 1 is taken and reinforcement material be take ratio of grinding media to material as 5:1 ball milling 5h～8h is 4 * 10 in vacuum -2pa～8 * 10 -2pa lacks under unit condition, first by room temperature, being warming up to temperature is 300～500 ℃, and be to be incubated 30min～60min at 300～500 ℃ in temperature, then the speed of 10 ℃/min～20 ℃/min of take is at the uniform velocity warming up to temperature as 1100～1300 ℃ by temperature as 300～500 ℃, simultaneously pressure be take the speed of 0.6MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 15MPa～30MPa by normal pressure, and be to keep 1h～2h under 1100～1300 ℃ and the pressure condition that is 15MPa～30MPa in temperature, by temperature, being 1100～1300 ℃ again, to be cooled to temperature be 700～900 ℃, pressure release, obtain TiBw/Ti composite, its reaction in-situ chemical equation is: Ti+TiB 2→ TiBw,
Three, the preparation of TiBw/Ti composite foil: the TiBw/Ti composite material line that step 2 is obtained is cut to the foil that thickness is 200 μ m～500 μ m, then the HF solution etch that is 5%～10% by mass concentration surface, obtaining thickness is the TiBw/Ti composite foil of 100 μ m～400 μ m;
Four, the preparation of stratiform Ti-TiBw/Ti composite: the Ti foil that the TiBw/Ti composite foil that step 3 is obtained and step 1 take is 4 * 10 in vacuum -2pa～8 * 10 -2under the condition of Pa, first by room temperature, being warming up to temperature is 300～500 ℃, and be to be incubated 30min～60min at 300～500 ℃ in temperature, then the speed of 10 ℃/min～20 ℃/min of take is at the uniform velocity warming up to temperature as 1000～1200 ℃ by temperature as 300～500 ℃, simultaneously pressure be take the speed of 0.6MPa/min～1.2MPa/min and is at the uniform velocity increased to pressure as 15MPa～30MPa by normal pressure, and be to keep 1h～2h under 1000～1200 ℃ and the pressure condition that is 15MPa～30MPa in temperature, by temperature, being 1000～1200 ℃ again, to be cooled to temperature be 400～500 ℃, pressure release, obtain stratiform Ti-TiBw/Ti composite, the Thickness Ratio of the Ti foil that the TiBw/Ti composite foil that described step 3 obtains and step 1 take is 3:(1～5).
2. Diffusion Welding according to claim 1 is prepared the method for Ti-TiBw/Ti laminar composite, it is characterized in that the reinforcement material described in step 1 is TiB 2powder, C powder, B 4c powder or BN powder.
3. Diffusion Welding according to claim 1 and 2 is prepared the method for Ti-TiBw/Ti laminar composite, and the mass ratio that it is characterized in that the Ti foil described in step 1 and Spherical Ti Powder is 1:2.
4. Diffusion Welding according to claim 3 is prepared the method for Ti-TiBw/Ti laminar composite, and the mass ratio that it is characterized in that the Ti foil described in step 1 and reinforcement material is 100:4.
5. Diffusion Welding according to claim 3 is prepared the method for Ti-TiBw/Ti laminar composite, it is characterized in that in step 2, first by room temperature, being warming up to temperature is 400 ℃, and is to be incubated 50min～60min at 400 ℃ in temperature.
6. Diffusion Welding according to claim 5 is prepared the method for Ti-TiBw/Ti laminar composite, the speed that it is characterized in that take in step 2 15 ℃/min is at the uniform velocity warming up to temperature as 1200 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and be to keep 1.5h～2h under 1200 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1200 ℃, to be cooled to temperature be 800 ℃.
7. Diffusion Welding according to claim 3 is prepared the method for Ti-TiBw/Ti laminar composite, it is characterized in that the TiBw/Ti composite material line in step 3, step 2 being obtained is cut to the foil that thickness is 300 μ m.
8. Diffusion Welding according to claim 3 is prepared the method for Ti-TiBw/Ti laminar composite, it is characterized in that it is 400 ℃ that Ti foil that the TiBw/Ti composite foil that in step 4, step 3 obtained and step 1 take is first warming up to temperature by room temperature, and be to be incubated 50min～60min at 400 ℃ in temperature.
9. Diffusion Welding according to claim 8 is prepared the method for Ti-TiBw/Ti laminar composite, the speed that it is characterized in that then take in step 4 15 ℃/min is at the uniform velocity warming up to temperature as 1100 ℃ by temperature as 400 ℃, simultaneously pressure be take the speed of 0.9MPa/min and is at the uniform velocity increased to pressure as 25MPa by normal pressure, and be that by normal pressure, to be at the uniform velocity increased to pressure be 25MPa for speed that 1100 ℃ and pressure are 25MPa in temperature, and be to keep 1.5h～2h under 1100 ℃ and the pressure condition that is 25MPa in temperature, then by temperature, being 1100 ℃, to be cooled to temperature be 450 ℃.
10. Diffusion Welding according to claim 3 is prepared the method for Ti-TiBw/Ti laminar composite, it is characterized in that the Thickness Ratio of the Ti foil that TiBw/Ti composite foil that the step 3 described in step 4 obtains and step 1 take is 3:(4～5).
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