CN110090954A - A kind of increasing material manufacturing NiTi marmem and preparation method thereof - Google Patents

A kind of increasing material manufacturing NiTi marmem and preparation method thereof Download PDF

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CN110090954A
CN110090954A CN201910334196.0A CN201910334196A CN110090954A CN 110090954 A CN110090954 A CN 110090954A CN 201910334196 A CN201910334196 A CN 201910334196A CN 110090954 A CN110090954 A CN 110090954A
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niti
increasing
marmem
selective laser
substrate
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CN110090954B (en
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郝世杰
熊志伟
李仲瀚
杨英
郭文倩
崔立山
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China University of Petroleum Beijing CUPB
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20Direct sintering or melting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00Processes of additive manufacturing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00Products made by additive manufacturing
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/04Making alloys by powder metallurgy
    • C22C1/0433Nickel- or cobalt-based alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C19/00Alloys based on nickel or cobalt
    • C22C19/03Alloys based on nickel or cobalt based on nickel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The present invention provides a kind of increasing material manufacturing NiTi marmems and preparation method thereof.In the preparation method, the increasing material manufacturing melts manufacturing process using selective laser, and used laser scanning strategy is put english for band subregion to be turned, wherein strip width 2-10mm, successively rotating angle is 50 ° -90 °.The present invention also provides the increasing material manufacturing NiTi marmems using above method preparation.The NiTi marmem of preparation method preparation provided by the present invention has excellent tensile mechanical properties and functional characteristic, has both big elongation strain and excellent memory effect.

Description

A kind of increasing material manufacturing NiTi marmem and preparation method thereof
Technical field
The present invention relates to a kind of increasing material manufacturing NiTi marmems and preparation method thereof more particularly to one kind to have both greatly Elongation strain and the increasing material manufacturing NiTi marmem of excellent memory effect and preparation method thereof, belong to marmem Preparation technical field.
Background technique
NiTi marmem has special shape memory effect and super-elasticity, high-damping, high corrosion-resistant and excellent Biocompatibility, obtain many applications in fields such as aerospace, biologic medical, mechano-electronics.But it is limited to NiTi conjunction The machinability of gold is poor, the NiTi memorial alloy part normally shape list prepared using conventional method (melting+machining) One, structure is simple, seriously constrains its popularization and application.
Precinct laser fusion (Selective Laser Melting, SLM) technology is to utilize high energy laser beam, according to Digital model is selectively point-by-point on designed two-dimensional section, melts metal powder line by line, from bottom to top successively beats Print a kind of increases material manufacturing technology of solid metal part.The direct manufacture of labyrinth metal parts can be realized using SLM technology, Have many advantages, such as that dimensional accuracy is high, surface quality is good, consistency is high, it is expected to as the new of manufacture labyrinth NiTi alloy part Approach.
Currently, example quite mature using the technique of the metals such as selective laser smelting technology printing titanium alloy, aluminium alloy If CN104174845A discloses a kind of method that selective laser melting (SLM) molding prepares titanium alloy component, CN105014073A is disclosed A kind of fusing increasing material manufacturing of TC4 titanium alloy selective laser and heat treatment method, CN105149583A disclose a kind of aluminium Melt manufacturing process and its system in selective laser.
But so far, lack a kind of increasing material manufacturing NiTi memory conjunction for having both big elongation strain and excellent memory effect Gold and preparation method thereof.The NiTi marmem of reported precinct laser fusion preparation, maximum tension strain≤ 7%, much smaller than elongation strain (> 14%) possessed by traditional approach preparation NiTi marmem, and material internal exists The large scales defect such as more cavity and the unidirectional column crystal of large scale practical service condition and meet practical application far from meeting Demand.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of increasing material manufacturing NiTi marmem and The tensile break strength of preparation method, prepared increasing material manufacturing NiTi marmem reaches 600MPa or more, stretches Breaking strain >=14%, and in prestretching stretching strain≤8%, shape recovery rate is above 60% to material after the heating.
In order to achieve the above objectives, the present invention provides a kind of preparation method of increasing material manufacturing NiTi marmem, In, the increasing material manufacturing melts manufacturing process using selective laser, and used laser scanning strategy is put english for band subregion to be turned, Wherein, strip width 2-10mm, successively rotating angle is 50 ° -90 °.
In the above preparation method, it is preferable that the process conditions of the selective laser fusing manufacturing process are as follows: laser power 40-200W, 30-100 μm of spot diameter, scanning speed 200-1800mm/s, 40-160 μm of sweep span, powdering thickness 20-60 μ m;It is highly preferred that the process conditions be laser power 100-120W, 50-70 μm of spot diameter, scanning speed 500-1000mm/ S, 70-100 μm of sweep span, 25-35 μm of powdering thickness.
In the above preparation method, it is preferable that it is using former that powder raw material used by manufacturing process is melted in selective laser Prealloy NiTi powder, granule diameter prepared by sub- aerosolization mode is distributed in 15-53 μm, and is passing through 60 DEG C -120 using preceding DEG C (preferably 80 DEG C) are dried in vacuo isothermal holding 4-5 hours.
In the above preparation method, it is preferable that the process conditions of the selective laser fusing manufacturing process further include: oxygen Content≤500ppm (oxygen content i.e. in the melting unit of selective laser), protective gas be argon gas or nitrogen, protective gas Air pressure is maintained at 10-20mbar.
In the above preparation method, it is preferable that the process conditions of the selective laser fusing manufacturing process further include: select Baseplate material be titanium-base alloy, and in use process substrate heating temperature be 100 DEG C -200 DEG C;Preferably, the substrate For TiNi alloy substrate.It completes after preparing, the increasing material manufacturing NiTi marmem that will be obtained in the way of wire cutting etc. Exemplar is scaled off from substrate.
The present invention also provides a kind of increasing material manufacturing NiTi shape memories for having both big elongation strain and excellent memory effect Alloy is prepared by the above method, wherein the NiTi marmem at being grouped as are as follows: atomic ratio be (48: 52) the sum of atomic percentage of-(52:48) Ni element and Ti element, Ni element and Ti element is 100%.
Specific embodiment according to the present invention, it is preferable that the consistency of above-mentioned increasing material manufacturing NiTi marmem It is 99% or more, without obvious large scale defect, such as cavity, crackle or the presence being mingled with etc..
Specific embodiment according to the present invention, it is preferable that above-mentioned increasing material manufacturing NiTi marmem is along printing life Tortuous " shape " crystal boundary pattern is presented in the microstructure of length direction.
Specific embodiment according to the present invention, it is preferable that above-mentioned increasing material manufacturing NiTi marmem has reversible Martensitic traoformation behavior, there are the positive phase transformation of martensite and reverse transformations during cooling and heating.
Specific embodiment according to the present invention, it is preferable that the stretching of above-mentioned increasing material manufacturing NiTi marmem is disconnected Resistance to spalling is 600MPa or more, tension failure strain >=14%, and in prestretching stretching strain≤8%, increasing material manufacturing NiTi shape Shape recovery rate is above 60% to shape memory alloys after the heating.
The NiTi memorial alloy of preparation method provided by the present invention preparation have the function of excellent tensile mechanical properties and Characteristic has both big elongation strain and excellent memory effect.
Detailed description of the invention
Fig. 1 is that embodiment 1 prepares scanning strategy schematic diagram used by NiTi shape memory alloy material;
Fig. 2 is the stretching mechanical curve of NiTi shape memory alloy material prepared by embodiment 1;
Fig. 3 is the DSC curve of NiTi shape memory alloy material prepared by embodiment 1;
Fig. 4 is the scanning electron microscope secondary electron images of NiTi shape memory alloy material prepared by embodiment 1;
Fig. 5 be embodiment 1 prepare NiTi shape memory alloy material under different prestretching stretching strains loading-unloading-plus Hot return curve.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment 1
Present embodiments provide a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.6:49.4 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 120W, and 60 μm of spot diameter, scanning speed 500mm/s, 80 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy is put english for band subregion to be turned, wherein band Width is 4mm, and successively rotating angle is 67 °.
Fig. 1 is that embodiment 1 prepares scanning strategy used by the increasing material manufacturing technique of NiTi shape memory alloy material and shows It is intended to.Used scanning strategy is put english for band subregion and is turned as seen from Figure 1, and wherein strip width is 4mm, successively rotates Angle is 67 °.
Fig. 2 is the stretching mechanical curve of NiTi shape memory alloy material prepared by embodiment 1.By the related data of Fig. 1 It can be seen that material tension failure strain is up to 15.6%, tensile break strength reaches 703MPa.
Fig. 3 is the DSC curve of NiTi shape memory alloy material prepared by embodiment 1.The NiTi shape as seen from Figure 2 Shape memory alloys material has reversible martensitic traoformation, there is apparent martensitic traoformation peak in cooling procedure, wherein Ms It is 41.4 DEG C, MfPoint is 4.3 DEG C, there is apparent martensite reverse transformation peak during heating, wherein AsIt is 37.4 DEG C, AfFor 65.3℃。
Fig. 4 is the scanning electron microscope secondary electron images of NiTi shape memory alloy material prepared by embodiment 1.By scheming 3 as can be seen that the NiTi shape memory alloy material no significant defect exists, and Forming Quality is good, and consistency is high.
Fig. 5 be embodiment 1 prepare NiTi shape memory alloy material under different prestretching stretching strains loading-unloading-plus Hot return curve.Shape can be presented through heating after stretcher strain in the NiTi shape memory alloy material as seen from Figure 4 It replys, and elongation strain is smaller, response rate is higher.
Embodiment 2
Present embodiments provide a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.8:49.2 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 120W, and 60 μm of spot diameter, scanning speed 800mm/s, 80 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy is put english for band subregion to be turned, wherein band Width is 4mm, and successively rotating angle is 67 °.
Embodiment 3
Present embodiments provide a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.4:49.6 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 100W, and 60 μm of spot diameter, scanning speed 500mm/s, 80 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy is put english for band subregion to be turned, wherein band Width is 4mm, and successively rotating angle is 67 °.
Embodiment 4
Present embodiments provide a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.6:49.4 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 120W, and 60 μm of spot diameter, scanning speed 800mm/s, 110 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy is put english for band subregion to be turned, wherein band Width is 3mm, and successively rotating angle is 67 °.
Embodiment 5
Present embodiments provide a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.5:49.5 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 120W, and 60 μm of spot diameter, scanning speed 600mm/s, 90 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy is put english for band subregion to be turned, wherein band Width is 4mm, and successively rotating angle is 67 °.
Comparative example 1
This comparative example provides a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.4:49.6 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 200W, and 60 μm of spot diameter, scanning speed 1000mm/s, 130 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy be long line orthogonal scanning, i.e., regardless of Area, successively rotating angle is 90 °.
Comparative example 2
This comparative example provides a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.6:49.4 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 120W, and 60 μm of spot diameter, scanning speed 800mm/s, 110 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy is long straight line simple scanning, i.e. not subregion, It does not rotate successively.
Comparative example 3
This comparative example provides a kind of preparation method of increasing material manufacturing NiTi marmem comprising following steps:
The threedimensional model and slicing treatment for constructing 80 × 15 × 3mm lath-shaped part are inputted 3D printing filling software In, it obtains the two dimensional slice data of part and is conducted into metal powder laser melting systems.NiTi shape note after taking drying Recall alloy powder to spread on the substrate of selective laser melting unit, substrate is previously heated to 180 DEG C, and melts to selective laser Inert gas argon gas is passed through in equipment, until oxygen content is in 500ppm or less in it.Powdering is circularly carried out on substrate, Laser melting process obtains 80 × 15 × 3mm lath-shaped until the last layer stops after processing is completed after clearing up using powder Part is cut this lath-shaped part from substrate to get to NiTi shape memory alloy material with wire cutting.
Wherein, the constituent of obtained NiTi marmem are as follows: atomic ratio be 50.6:49.4 Ni element and The sum of atomic percentage of Ti element, Ni element and Ti element is 100%.
The process conditions that manufacturing process is melted in selective laser are as follows: laser power 180W, and 60 μm of spot diameter, scanning speed 600mm/s, 140 μm of sweep span, 30 μm of powdering thickness.Selected scanning strategy adds orthogonal for band subregion, wherein band Width is 4mm, and successively rotating angle is 90 °.
Its consistency and mechanical property are measured to 80 × 15 × 3mm lath-shaped part that embodiment 1-5 and comparative example 1-3 are obtained Can, the results are shown in Table 1.
Table 1
By the data of table 1 it can be seen that the NiTi shape memory alloy material of embodiment 1-5 preparation has good densification Degree and comprehensive mechanical property, wherein the consistency of NiTi shape memory alloy material prepared by embodiment 1 and comprehensive mechanical property It can be optimal.

Claims (10)

1. a kind of preparation method of increasing material manufacturing NiTi marmem, wherein the increasing material manufacturing is molten using selective laser Change manufacturing process, used laser scanning strategy is put english for band subregion to be turned, wherein strip width 2-10mm successively revolves Gyration is 50 ° -90 °.
2. preparation method according to claim 1, wherein the process conditions of the selective laser fusing manufacturing process are as follows: Laser power 40-200W, 30-100 μm of spot diameter, scanning speed 200-1800mm/s, 40-160 μm of sweep span, powdering layer It is 20-60 μm thick;
Preferably, the process conditions be laser power 100-120W, 50-70 μm of spot diameter, scanning speed 500-1000mm/ S, 70-100 μm of sweep span, 25-35 μm of powdering thickness.
3. preparation method according to claim 1, wherein melt powder raw material used by manufacturing process and be in selective laser The prealloy NiTi powder, granule diameter prepared using atom aerosolization mode is distributed in 15-53 μm, is preferably using preceding process 60-120 DEG C vacuum drying isothermal holding 2-5 hours.
4. preparation method according to claim 1, wherein the process conditions of the selective laser fusing manufacturing process are also It include: oxygen content≤500ppm, protective gas is argon gas or nitrogen, and the air pressure of protective gas is maintained at 10-20mbar.
5. preparation method according to claim 1 or 4, wherein the process conditions of the selective laser fusing manufacturing process Further include: the baseplate material of selection is titanium-base alloy, and the heating temperature of substrate is 100 DEG C -200 DEG C in use process;It is preferred that Ground, the substrate are TiNi alloy substrate.
6. a kind of increasing material manufacturing NiTi marmem for having both big elongation strain and excellent memory effect, is to pass through right It is required that 1-5 described in any item methods preparation, wherein the NiTi marmem at being grouped as are as follows: atomic ratio is The sum of atomic percentage of the Ni element and Ti element of (48:52)-(52:48), Ni element and Ti element is 100%.
7. increasing material manufacturing NiTi marmem according to claim 6, wherein increasing material manufacturing NiTi memorial alloy Consistency be 99% or more.
8. increasing material manufacturing NiTi marmem according to claim 6, wherein increasing material manufacturing NiTi memorial alloy Tortuous shape crystal boundary pattern is presented along the microstructure of the printing direction of growth.
9. increasing material manufacturing NiTi marmem according to claim 6, wherein increasing material manufacturing NiTi memorial alloy With reversible martensitic traoformation behavior.
10. according to the described in any item increasing material manufacturing NiTi marmems of claim 6-9, wherein the increasing material manufacturing The tensile break strength of NiTi marmem is 600MPa or more, and tension failure strains >=14%, and in prestretching stretching strain When≤8%, shape recovery rate is above 60% to increasing material manufacturing NiTi marmem after the heating.
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CN110508815A (en) * 2019-10-09 2019-11-29 山东大学 A method of niti-shaped memorial alloy phase transition temperature is regulated and controled based on increasing material manufacturing
CN110792721A (en) * 2019-11-18 2020-02-14 中国工程物理研究院机械制造工艺研究所 Recoverable energy absorption structure and preparation method thereof
CN110819840A (en) * 2019-11-18 2020-02-21 哈尔滨工程大学 TiNi memory alloy containing gradient distribution components and additive manufacturing process thereof
CN111842888A (en) * 2020-06-18 2020-10-30 华中科技大学 4D printing method of nickel titanium based ternary shape memory alloy
CN111842887A (en) * 2020-06-18 2020-10-30 华中科技大学 Temperature control self-deformation device based on 4D printing and preparation method thereof
CN111957962A (en) * 2020-08-13 2020-11-20 飞而康快速制造科技有限责任公司 Additive manufacturing method and additive manufacturing device for selective laser melting for titanium alloy molding
CN112059181A (en) * 2020-08-28 2020-12-11 中国地质大学(武汉) Nickel-manganese-indium shape memory alloy part and 4D forming method thereof

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