CN108213427A - A kind of high-performance titanium material fabrication process - Google Patents

A kind of high-performance titanium material fabrication process Download PDF

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Publication number
CN108213427A
CN108213427A CN201810023620.5A CN201810023620A CN108213427A CN 108213427 A CN108213427 A CN 108213427A CN 201810023620 A CN201810023620 A CN 201810023620A CN 108213427 A CN108213427 A CN 108213427A
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CN
China
Prior art keywords
printing
fabrication
performance titanium
titanium
printing equipment
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810023620.5A
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Chinese (zh)
Inventor
李会星
王大为
周鹏
周溯源
严明
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Southwest University of Science and Technology
Southern University of Science and Technology
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Southwest University of Science and Technology
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Publication date
Application filed by Southwest University of Science and Technology filed Critical Southwest University of Science and Technology
Priority to CN201810023620.5A priority Critical patent/CN108213427A/en
Publication of CN108213427A publication Critical patent/CN108213427A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • B22F2201/00Treatment under specific atmosphere
    • B22F2201/02Nitrogen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F2201/00Treatment under specific atmosphere
    • B22F2201/10Inert gases
    • B22F2201/11Argon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F2999/00Aspects linked to processes or compositions used in powder metallurgy
    • 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 invention discloses a kind of high-performance titanium material fabrication process, belong to 3D printing technique field.The high-performance titanium material fabrication process of the present invention includes the following steps that S1, the threedimensional model for establishing the required product manufactured in a computer preserve and export STL formatted files;S2, setting 3D printing parameter, carry out layered shaping to threedimensional model, preserve and export the file of SLM forms;S3, the mixed gas of argon gas and nitrogen is filled with to 3D printing equipment as protective gas, and is preheated to condition needed for work;S4, the file of SLM forms is imported into 3D printing equipment, carries out 3D printing.The high-performance titanium material fabrication process of the present invention is passed through the mixed gas of nitrogen and argon gas as protective gas before 3D printing, and molding product mechanical property, which has, to be obviously improved.

Description

A kind of high-performance titanium material fabrication process
Technical field
The invention belongs to 3D printing technique field, more particularly, to a kind of high-performance titanium material fabrication process.
Background technology
3D printing technique, also referred to as increases material manufacturing technology, its appearance change conventionally manufactured pattern.It melts selective laser (SLM) technology is one kind of metal 3D printing, and forming principle is that the threedimensional model of design is separated into profile in layer Information, control laser beam flying metal powder form molten road, and molten road mutually overlaps to form level, and level is stacked into three Vygens one by one Belong to part.Compared with traditional manufacturing technology, SLM technologies protrude the advantages of one of be almost can be with the arbitrarily complicated structure of straight forming And the function part with complete metallurgical binding, consistency can reach intimate 100%, application range has been extended to biological doctor The fields such as treatment, aerospace, automobile.
SLM processing parts are a high energy laser beam and the process of metal powder effect, since metal material is in high temperature Under easily react with the oxygen in air, oxide to Forming Quality have very big negative effect, such as:Soak material Property be greatly reduced, hinder metallurgical binding ability between layers, between molten road etc.;Simultaneously during SLM is molding often Evoke some flue gases, exhaust gas volumn will regard material and moulding process is different and different, but be difficult always to avoid, these flue gases are in length In the forming process of time, it can gradually be accumulated on molding indoor article, powder, transmissive mirror, powdering mechanism are all polluted, It reduces Forming Quality or even because transmissive mirror is stained significantly, molding is caused to interrupt.So metal powder is in quilt in order to prevent Laser facula occurs oxidation and reduces flue dust to molding influence during melting, will usually lead in entire forming process Enter inert gas as protective gas.
Invention content
The technical problems to be solved by the invention are, a kind of high-performance titanium material fabrication process are provided, by being passed through nitrogen The mixed gas of gas and argon gas is as protective gas so that molding titanium material property is more excellent.
Solution is used by the present invention solves above-mentioned technical problem:A kind of high-performance titanium material manufacture work is provided Skill includes the following steps:S1, the threedimensional model for establishing the required product manufactured in a computer preserve and export STL forms text Part;S2, setting 3D printing parameter, carry out layered shaping to threedimensional model, preserve and export the file of SLM forms;S3, it is beaten to 3D Printing apparatus is filled with the mixed gas of argon gas and nitrogen as protective gas, and is preheated to condition needed for work;S4, by SLM forms File import 3D printing equipment, carry out 3D printing.
As a further improvement of the above technical scheme, in S3, the content of nitrogen is (1~19) %, correspondingly, argon gas Content is (99~81) %.
As a further improvement of the above technical scheme, in S3, the content of nitrogen is 10%, and the content of argon gas is 90%.
As a further improvement of the above technical scheme, oxygen of the condition needed for the work for the work chamber of 3D printing equipment Gas content is less than 0.1%, and the temperature of the substrate of 3D printing equipment reaches 120~200 DEG C.
As a further improvement of the above technical scheme, SLM Solutions Gmbh of the 3D printing equipment for Germany The 3D printing equipment of the model SLM-125HL of company's production.
As a further improvement of the above technical scheme, in S4,3D printing is carried out using level-one industrially pure titanium, powder is Spherical shape, diameter distributed area are 15~45 μm.
As a further improvement of the above technical scheme, after the completion of printing, by molding production in a manner of Wire EDM Product are detached with the substrate of 3D printing equipment.
As a further improvement of the above technical scheme, sandblasting, polishing treatment are carried out to the molding product separated.
As a further improvement of the above technical scheme, in S2, the 3D printing parameter includes the placement position of part, pendulum Put scan mode, sweep span, sweep speed, laser power and the compensating factor of mode and laser.
As a further improvement of the above technical scheme, the scan mode is ecto-entad, and the sweep speed includes External scan speed, inner scanning speed, the external scan speed are 500~1000mm/s, and the inner scanning speed is 300~800mm/s, the sweep span are set as 100~160 μm, and the laser power includes external scan power, inside is swept Power is retouched, the external scan power is 120~250W, and the inner scanning power is 80~200W, and the compensating factor is set It is set to 0~30 μm.
The beneficial effects of the invention are as follows:
The high-performance titanium material fabrication process of the present invention includes the following steps, S1, establishes required manufacture in a computer The threedimensional model of product preserves and exports STL formatted files;S2, setting 3D printing parameter, carry out at layering threedimensional model Reason preserves and exports the file of SLM forms;S3, the mixed gas of argon gas and nitrogen is filled with to 3D printing equipment as protection gas Body, and it is preheated to condition needed for work;S4, the file of SLM forms is imported into 3D printing equipment, carries out 3D printing.Using nitrogen Mixed gas with argon gas is as protective gas, and compared to argon gas is filled in traditional handicraft as protective gas, additional nitrogen is first Element can strengthen titanium material, and the mechanical property for making molding high-performance titanium material is significantly more excellent.
Description of the drawings
Fig. 1 is the flow chart of the high-performance titanium material fabrication process of the present invention;
Fig. 2 is the structure diagram of 3D printing equipment used in the present invention;
Fig. 3 is the structure diagram of product prepared by the present invention.
Specific embodiment
The technique effect of the design of the present invention, concrete structure and generation is carried out below with reference to embodiment and attached drawing clear Chu is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair Bright part of the embodiment rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not paying The other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.In addition, it is arrived involved in patent All connection/connection relations, not singly refer to component and directly connect, and refer to can according to specific implementation situation, by addition or Couple auxiliary is reduced, to form more preferably coupling structure.Each technical characteristic in the present invention, before not conflicting conflict Putting can be with combination of interactions.
Such as Fig. 1, the flow chart of the high-performance titanium material fabrication process of the present invention is shown, in the present embodiment, 3D printing is set The 3D printing equipment of the model SLM-125HL of German SLM Solutions Gmbh companies production is alternatively selected as (such as Fig. 2 institutes Show), the high-performance titanium material fabrication process of the present invention is illustrated in conjunction with Fig. 2, specific steps are as follows:
S1, establish in a computer needed for the threedimensional model of product for preparing, according to the required practical structures for preparing product, Using the CADs such as Solidworks, UG or Pro/Engineer (CAD) software, design and establish actual product 8 Threedimensional model, and save as STL formatted files.Wherein, the parameter of threedimensional model is subject to the parameter of actual product 8, including The outside of product and the shape of internal structure, size etc..
S2 imports derived stl file in the Materialise Magics21.0 softwares with 3D printing coordinative composition of equipments, 3D printing parameter is set, layered shaping is carried out to threedimensional model, then preserves and export the file of corresponding format, the present embodiment In, the form of this document is SLM formatted files.
Specifically, 3D printing parameter includes the placement position of product 8, the scan mode of disposing way and laser, scanning Spacing, sweep speed, laser power and compensating factor.Wherein, the scan mode of laser is scanned for ecto-entad, and sweep span is set Be set to 100~160 μm, sweep speed includes external scan speed and inner scanning speed, external scan speed for 500~ 1000mm/s, inner scanning speed is 300~800mm/s, correspondingly, scan power includes external scan power and inner scanning Power, external scan power are 120~250W, and inner scanning power is 80~200W, and compensating factor is set as 0~30 μm.
The placement position of product 8 is determined according to the quantity and size of product, it is ensured that it does not block mutually, it is non-interference, and make 4 direction of motion of power spreading device of part horizontal direction and 3D printing equipment is into 20~60 °.
In the present embodiment, in delaminating process, if threedimensional model is divided into the equal synusia of dry thickness along Print direction, After carrying out layered shaping, every layer of thickness is 30~80 μm.
S3 before 3D printing is carried out, needs first to be passed through protective gas into 3D printing equipment, to completely cut off 3D printing equipment Internal oxygen, in the present embodiment, which is passed through work chamber 2 by mixed gas of the protective gas for nitrogen and argon gas In, start 3D printing equipment control software, leveling substrate 7 makes it equal with 2 bottom surface of work chamber, starts to preheat, open simultaneously work Make the protection gas air inlet 3 in cabin 2 and protection gas gas outlet 9, until the temperature of substrate 7 reach the required temperature of work (120~ 200 DEG C), the oxygen content in work chamber 2 is when being less than 0.1%.
S4 imports SLM formatted files in 3D printing equipment, 3D printing is carried out, specifically, SLM formatted files are imported After 3D printing equipment, check and import errorless rear beginning printing;According to the file of importing, 3D printing equipment in S2 according to setting Print parameters, using industrially pure titanium powder, 3D printing is carried out using selective laser smelting technology, in the present embodiment, technical pure Titanium powder is selected as level-one industrially pure titanium, and powder is spherical shape, and diameter distributed area is 15~45 μm.
In print procedure, in work chamber 2, power spreading device 4 is parked in 7 right end of substrate, first 4 horizontal direction of power spreading device The industrially pure titanium powder that 4 inside of power spreading device delivers uniformly is layered on substrate 7, has often spread the thickness of a unit by left movement, Galvanometer system 10 carries out laser scanning, so repeatedly, until product machines, during processing, the cavity of product and work chamber 2 it Between extra industrially pure titanium powder recycled by the first recovery capsule channel 5 and the second recovery capsule channel 6.
When in power spreading device without industrially pure titanium powder, return to plus powder pipeline contact position, by add powder pipeline 1 from Powder is rejoined in power spreading device in powder cabin 11, completes to restart printing after adding powder operation, until entire 3D is beaten Process is printed to complete.
After the completion of 3D printing, system is automatically stopped work, can be dismantled after substrate is cooled to suitable temperature with product It takes out, then cleaning work cabin, and being detached product with substrate with the methods of Wire EDM.
After product is detached with substrate, can also the working processes such as sandblasting, polishing be carried out to product according to actual demand.
Such as Fig. 3, the structure diagram of the tensile sample of the one of embodiment manufacture of the present invention is shown, in order to verify nitrogen Performance boost of the mixed proportion of gas and argon gas to shaped article, inventor have carried out detailed comparison reality for tensile sample It tests, as shown in Table 1.
Table one
With reference to table one, the mechanical property for being passed through mixed gas molding product to 3D printing of nitrogen and argon gas has significantly Promotion, and when the ratio of nitrogen is 10%, the ratio of argon gas is 90%, product mechanics promoted it is optimal, at this point, product Yield strength improves 50.38%, and tensile strength improves 32.57%, and maximum elongation percentage improves 25.12%, significantly Better than pure nitrogen gas and product of the pure argon as protective gas machine-shaping.
It is presently preferred embodiments of the present invention to be illustrated, but the present invention is not limited to the embodiment above, Those skilled in the art can also make various equivalent variations or replacement under the premise of without prejudice to spirit of the invention, this Equivalent deformation or replacement are all contained in the application claim limited range a bit.

Claims (10)

1. a kind of high-performance titanium material fabrication process, which is characterized in that include the following steps:
S1, the threedimensional model for establishing the required product manufactured in a computer, preserve and export STL formatted files;
S2, setting 3D printing parameter, carry out layered shaping to threedimensional model, preserve and export the file of SLM forms;
S3, the mixed gas of argon gas and nitrogen is filled with to 3D printing equipment as protective gas, and is preheated to condition needed for work;
S4, the file of SLM forms is imported into 3D printing equipment, carries out 3D printing.
2. high-performance titanium material fabrication process according to claim 1, it is characterised in that:In S3, the content of nitrogen is (1 ~19) %, correspondingly, the content of argon gas is (99~81) %.
3. high-performance titanium material fabrication process according to claim 2, it is characterised in that:In S3, the content of nitrogen is 10%, the content of argon gas is 90%.
4. high-performance titanium material fabrication process according to any one of claim 1-3, it is characterised in that:The work institute The oxygen content of work chamber that condition is 3D printing equipment is needed less than 0.1%, the temperature of the substrate of 3D printing equipment reaches 120~ 200℃。
5. high-performance titanium material fabrication process according to any one of claim 1-3, it is characterised in that:The 3D printing 3D printing equipment of the equipment for the model SLM-125HL of the SLM Solutions Gmbh companies production of Germany.
6. high-performance titanium material fabrication process according to any one of claim 1-3, it is characterised in that:In S4, use Level-one industrially pure titanium carries out 3D printing, and powder is spherical shape, and diameter distributed area is 15~45 μm.
7. high-performance titanium material fabrication process according to any one of claim 1-3, it is characterised in that:Printing is completed Afterwards, molding product is detached with the substrate of 3D printing equipment in a manner of Wire EDM.
8. high-performance titanium material fabrication process according to claim 7, it is characterised in that:Molding production to separating Product carry out sandblasting, polishing treatment.
9. high-performance titanium material fabrication process according to any one of claim 1-3, it is characterised in that:It is described in S2 3D printing parameter includes the placement position of part, the scan mode of disposing way and laser, sweep span, sweep speed, swashs Luminous power and compensating factor.
10. high-performance titanium material fabrication process according to claim 9, it is characterised in that:The scan mode is by outer Inwardly, the sweep speed includes external scan speed, inner scanning speed, and the external scan speed is 500~1000mm/ S, the inner scanning speed are 300~800mm/s, and the sweep span is set as 100~160 μm, the laser power packet External scan power, inner scanning power are included, the external scan power is 120~250W, and the inner scanning power is 80 ~200W, the compensating factor are set as 0~30 μm.
CN201810023620.5A 2018-01-10 2018-01-10 A kind of high-performance titanium material fabrication process Pending CN108213427A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103495731A (en) * 2013-09-03 2014-01-08 广州中国科学院先进技术研究所 Method for manufacturing pure titanium porous structure through selective laser melting
CN103962556A (en) * 2014-04-16 2014-08-06 广州中国科学院先进技术研究所 Pure titanium powder forming method based on selected area laser melting technology
CN104174845A (en) * 2014-08-13 2014-12-03 杭州电子科技大学 Selective laser melting forming method for preparing titanium alloy component
CN104646669A (en) * 2013-11-25 2015-05-27 广州中国科学院先进技术研究所 Biomedical porous pure-titanium implant material and preparation method thereof
CN106181060A (en) * 2016-07-10 2016-12-07 上海大学 A kind of method of cut TC4 titanium alloy sheet
CN107225242A (en) * 2017-05-19 2017-10-03 淮阴工学院 The method and implant of 3D printing in-situ authigenic multi-stage nano ceramic phase reinforcing titanium alloy bone implant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103495731A (en) * 2013-09-03 2014-01-08 广州中国科学院先进技术研究所 Method for manufacturing pure titanium porous structure through selective laser melting
CN104646669A (en) * 2013-11-25 2015-05-27 广州中国科学院先进技术研究所 Biomedical porous pure-titanium implant material and preparation method thereof
CN103962556A (en) * 2014-04-16 2014-08-06 广州中国科学院先进技术研究所 Pure titanium powder forming method based on selected area laser melting technology
CN104174845A (en) * 2014-08-13 2014-12-03 杭州电子科技大学 Selective laser melting forming method for preparing titanium alloy component
CN106181060A (en) * 2016-07-10 2016-12-07 上海大学 A kind of method of cut TC4 titanium alloy sheet
CN107225242A (en) * 2017-05-19 2017-10-03 淮阴工学院 The method and implant of 3D printing in-situ authigenic multi-stage nano ceramic phase reinforcing titanium alloy bone implant

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