CN109261967A - A kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material - Google Patents
A kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material Download PDFInfo
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Abstract
The invention discloses a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material, this method comprises: one, establish three-dimensional lattice structural model；Two, porous body Model is established；Three, merge POROUS TUNGSTEN material model and to be layered；Four, the POROUS TUNGSTEN material model after layering is imported in electron beam selective melting former, successively carries out input parameter, dress powder, leveling forming bottom plate, vacuumizes and preheat；Five, selective melting is carried out to tungsten powder and selective sintering obtains single layer entity lamella；Six, it repeats single layer entity lamella preparation process and obtains POROUS TUNGSTEN material forming part；Seven, residual powder is gone to obtain POROUS TUNGSTEN material after cooling.The present invention is sequentially prepared the three-dimensional lattice structure and porous structure of POROUS TUNGSTEN material using electron beam subarea-scanning forming process, by adjusting three-dimensional lattice structure and the sintering degree of internal porous body adjustment POROUS TUNGSTEN material mechanical performance and porosity, process flow is short, suitable for the POROUS TUNGSTEN material of particular/special requirement, the application range of POROUS TUNGSTEN material is expanded.
Description
Technical field
The invention belongs to technical field of material, and in particular to a kind of electron beam subarea-scanning forming of POROUS TUNGSTEN material
Method.
Background technique
Porous materials have the characteristics that low-density, high-ratio surface, in many technical fields such as catalyst, filtering, composite material
There is great application.POROUS TUNGSTEN material is widely used in navigating because having the features such as high-melting-point and boiling point of tungsten, low-vapor pressure
In empty space flight, power electronics and metallurgical industry and other extreme environment fields.It such as can be used for the porous cathode base of high current density
Gas distribution material etc. under body, the filter of high temperature fluid, high-temperature purification of gas device, transpiration material skeleton, high temperature.Meanwhile it is porous
Tungsten basal body can also make rocket nozzle larynx lining by seeping coolant, and the matrix etc. of electric contact material is produced with infusion process.
In such use, uniformity of porosity, aperture size and distribution of pores etc. has the performance of porous tungsten product
Significant impact.The preparation method of POROUS TUNGSTEN mainly has at present: prior powder metallurgy method, electrolysis method, grout coating process, plasma agglomeration
Method, injection molding etc..With narrow in patent " a kind of preparation method of hole even porous tungsten (publication number CN108436079 A) "
The powder of size distribution is raw material, prepares POROUS TUNGSTEN using the method for traditional compacting-sintering, realizes batch production, but should
Method can not direct forming abnormity porous material, the connectivity of hole is also relatively difficult to guarantee.A kind of patent " electrolytic preparation of POROUS TUNGSTEN
Method " (authorization publication No. CN103774184 B), which provides, a kind of electrochemically to be carried out electrolysis processing to tungsten block, passes through control
The porous material preparation method of the weightless adjustment apertures rate of system, but the pore size distribution and the more difficult control of depth of the POROUS TUNGSTEN of this method preparation
System.Patent " microporous mesh structural porous tungsten structure with high porosity and preparation method thereof (authorization publication No. CN101660080 B) " provides
One kind obtaining green body using through-hole organic foam as carrier, using grouting, then carries out the side that high-temperature vacuum sintering obtains porous body
Method, this method can prepare high porosity tungsten porous structure, but due to needing to influence sample using foam carrier and binder
Purity, meanwhile, the uniformity that slurry is sprawled on carrier also more difficult control.A kind of patent " POROUS TUNGSTEN block of hole uniform, controllable
The preparation method (authorization publication No. CN105734332 B) of body material " provides a kind of by plasma flash sintering method system
The method of standby tungsten porous material, this method need to will receive limitation in the forming of complexity porous member using mold.Patent
" a kind of method (publication number CN105499574 A) for preparing the uniform complicated-shape porous tungsten product of hole " provides a kind of using injection molding
The method that forming technique prepares tungsten porous structure can prepare complex-shaped, high dimensional accuracy POROUS TUNGSTEN using this method
Structure, still, this method are needed using binder, and process is complex.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of POROUS TUNGSTEN material
Electron beam subarea-scanning manufacturing process.This method is sequentially prepared the three of POROUS TUNGSTEN material using electron beam subarea-scanning forming process
Lattice structure and porous structure are tieed up, POROUS TUNGSTEN can be adjusted by adjusting three-dimensional lattice structure and the sintering degree of internal porous body
Material mechanical performance and porosity are not necessarily to mold and machining, and method quick-reading flow sheets is short, wants suitable for special shape and size
The POROUS TUNGSTEN material asked, to expand the application range of POROUS TUNGSTEN material significantly.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of electron beam subregion of POROUS TUNGSTEN material
Manufacturing process is scanned, the POROUS TUNGSTEN material is by three-dimensional lattice structure and the porous body group being filled in three-dimensional lattice structure hole
At, which is characterized in that method includes the following steps:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software, as shown in Figure 1；
Step 2: establishing porous body mould according to the internal void region for the three-dimensional lattice structural model established in step 1
Type, as shown in Figure 2；
Step 3: the porous body model combination that will be established in the three-dimensional lattice structural model established in step 1 and step 2
POROUS TUNGSTEN material model is obtained, as shown in figure 3, then carrying out layered shaping along the short transverse of POROUS TUNGSTEN material model, is obtained
Individual-layer data；Each layering that the layered shaping obtains includes belonging to the region of three-dimensional lattice structural model and belonging to porous body
The region of model；
It is set Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting forming
In standby, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder is packed into input forming
In the powder case of the electron beam selective melting former of parameter, and by the forming bottom plate tune of electron beam selective melting former
It is flat, its vacuum degree is evacuated to less than 1 × 10 to the forming cavity of electron beam selective melting former-2Pa, using electron beam pair
Forming bottom plate is preheated；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on,
Then the individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model inputted in step 4
Forming parameter to belong to the region of three-dimensional lattice structural model in each layering tungsten powder carry out selective melting, recycle electronics
Beam simultaneously uses the forming parameter of the porous body Model inputted in step 4 to the tungsten for belonging to the region of porous body Model in each layering
Powder carries out selective sintering, forms single layer entity lamella, by forming bottom plate decline；In the powdering thickness and step 3 of the tungsten powder
The thickness of each layer slice is identical；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate declines work
Skill forms POROUS TUNGSTEN material forming part until each single layer entity lamella is successively accumulated；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam constituency
It melts in the forming cavity of former and is passed through protective gas to accelerate cooling procedure, when the bottom of electron beam selective melting former
When plate temperature is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then removes POROUS TUNGSTEN material forming using high pressure gas
Remaining powder in part, obtains POROUS TUNGSTEN material.
The porous body that tungsten porous material is divided into three-dimensional lattice structure and is filled in three-dimensional lattice structure hole by the present invention
Two parts use electron beam subarea-scanning forming process using tungsten powder as raw material, first that tungsten powder is completely molten using different technological parameters
Change forms three-dimensional lattice structure, then tungsten powder surface fusing is made to bond between tungsten powder particles, the shape in three-dimensional lattice structural framing
At three-dimensional continuous porous body, the POROUS TUNGSTEN material that three-dimensional lattice inside configuration is filled with porous body is finally obtained, due to three-dimensional
Lattice structure mainly plays invigoration effect to the mechanical property of porous structure entirety, and internal porous body can be used for realizing porous knot
The functionality of structure, therefore can flexibly and easily be adjusted by adjusting three-dimensional lattice structure and the sintering degree of internal porous body porous
The mechanical properties such as the intensity of tungsten material and porosity, improve the hole uniformity of porous body, and method is simple and suitable for special
The POROUS TUNGSTEN material that shape and size require, to expand the application range of POROUS TUNGSTEN material significantly.
The electron beam subarea-scanning manufacturing process of above-mentioned a kind of POROUS TUNGSTEN material, which is characterized in that described in step 3
Each layer that layered shaping obtains slice with a thickness of 30 μm~100 μm.Within the above range, i.e., the thickness that each layer is sliced limits
It is to limit the powdering thickness of tungsten powder within the above range, to adapt to electron beam to the melting capacity of tungsten powder.
The electron beam subarea-scanning manufacturing process of above-mentioned a kind of POROUS TUNGSTEN material, which is characterized in that described in step 4
Tungsten powder is spherical shape or sphere-like tungsten powder of the partial size less than 150 μm.The tungsten powder mobility of above-mentioned partial size and shape is preferable, ensure that tungsten
Powder powdering process is gone on smoothly, and improves the whole uniformity of powdering powder bed, to improve the uniform of POROUS TUNGSTEN material
Property.
The electron beam subarea-scanning manufacturing process of above-mentioned a kind of POROUS TUNGSTEN material, which is characterized in that described in step 4
The temperature of forming bottom plate after preheated is 400 DEG C~800 DEG C.The ductil-brittle transition temperature of conventional tungsten is 250 DEG C~400 DEG C, on
The temperature of forming bottom plate after stating preheating much higher than the ductil-brittle transition temperature, ensure that subsequent multiple single layer entity lamellas at
The temperature of shape process on the ductil-brittle transition temperature, avoids the cracking of single layer entity lamella, improves POROUS TUNGSTEN material
Overall performance.
The electron beam subarea-scanning manufacturing process of above-mentioned a kind of POROUS TUNGSTEN material, which is characterized in that described in step 4
The forming parameter of three-dimensional lattice structural model are as follows: sweep current 11mA~15mA, scanning speed 0.1m/s~0.2m/s, line deflection
Distance 0.1mm~0.3mm.Selective melting is carried out to tungsten powder using above-mentioned forming parameter and prepares three-dimensional lattice structure in each layering
The region of model effectively controls the dimensional accuracy and refining quality of three-dimensional lattice structure muscle body, to improve three-dimensional lattice
Invigoration effect of the structure to the mechanical property of POROUS TUNGSTEN material structure entirety.
The electron beam subarea-scanning manufacturing process of above-mentioned a kind of POROUS TUNGSTEN material, which is characterized in that described in step 4
The forming parameter of porous body Model are as follows: sweep current 8mA~10mA, scanning speed 0.3m/s~0.5m/s, line deflection distance
0.1mm~0.3mm.The area that selective sintering prepares porous body Model in each layering is carried out to tungsten powder using above-mentioned forming parameter
Domain makes porous body sintering neck uniformly, completely, further improves the intensity of POROUS TUNGSTEN material.
Compared with the prior art, the present invention has the following advantages:
1, the present invention combines different technological parameters using electron beam subarea-scanning forming process, is sequentially prepared three-dimensional lattice knot
Structure and porous structure obtain the POROUS TUNGSTEN material that three-dimensional lattice inside configuration is filled with porous body, can be by adjusting three-dimensional point
The sintering degree of battle array structure knot internal porous body flexibly and easily adjusts the mechanical properties such as the intensity of POROUS TUNGSTEN material and porosity,
The hole uniformity of porous body is improved, mold and machining are not necessarily to, method is simple, and process is short, and it is at low cost, raw material is utilized
Rate is high, and is suitable for the POROUS TUNGSTEN material of special shape and size requirement, to expand the application model of POROUS TUNGSTEN material significantly
It encloses.
2, reduce pollution without adding carrier and pore creating material in forming process of the invention, improve POROUS TUNGSTEN material
Degree of purity.
3, high-melting-point tungsten powder is completely melt preparation three-dimensional lattice structure using the electron beam of high energy by the present invention, is promoted
Combination between tungsten-tungsten particle interface, improves the intensity of POROUS TUNGSTEN material.
4, the method that opposite conventional sintering method prepares tungsten porous material, the present invention use the electron beam of high energy by tungsten powder surface
Fusing generates the effect of instantaneous high-temperature liquid-phase sintering, and bonding between tungsten powder particles is made to form porous body, it is not necessary that active element is added,
The sintering neck of formation is complete.Further improve the intensity and degree of purity of POROUS TUNGSTEN material.
5, present invention process is simple, safely controllable, and molding accuracy is high, it can be achieved that anisotropic or complex appearance POROUS TUNGSTEN material
It is once-forming, improve preparation efficiency.
Technical solution of the present invention is described in further detail below by drawings and examples.
Detailed description of the invention
Fig. 1 is the schematic diagram of three-dimensional lattice structural model of the invention.
Fig. 2 is the schematic diagram of porous body Model of the invention.
Fig. 3 is the schematic diagram of POROUS TUNGSTEN material model of the invention.
Fig. 4 is the microstructure figure of POROUS TUNGSTEN material prepared by the embodiment of the present invention 1.
Specific embodiment
Embodiment 1
The POROUS TUNGSTEN material of the present embodiment is by three-dimensional lattice structure and the porous body being filled in three-dimensional lattice structure hole
Composition, the size of POROUS TUNGSTEN material are 20mm × 20mm × 20mm, porosity 30%, the electron beam subregion of the POROUS TUNGSTEN material
Scan manufacturing process the following steps are included:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software；The ruler of the three-dimensional lattice structural model
Very little is 20mm × 20mm × 20mm, porosity 90%；
Step 2: establishing porous body mould according to the internal void region for the three-dimensional lattice structural model established in step 1
Type；
Step 3: the porous body model combination that will be established in the three-dimensional lattice structural model established in step 1 and step 2
POROUS TUNGSTEN material model is obtained, then layered shaping is carried out along the short transverse of POROUS TUNGSTEN material model, obtains individual-layer data；Institute
Stating each layering that layered shaping obtains includes belonging to the region of three-dimensional lattice structural model and belonging to the region of porous body Model；
Each layer that the layered shaping obtains slice with a thickness of 30 μm；
It is set Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting forming
In standby, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder is packed into input forming
In the powder case of the electron beam selective melting former of parameter, and by the forming bottom plate tune of electron beam selective melting former
It is flat, its vacuum degree is evacuated to less than 0.5 × 10 to the forming cavity of electron beam selective melting former-2Pa, using electron beam
The temperature for carrying out being preheated to forming bottom plate to forming bottom plate is 400 DEG C；The tungsten powder is subsphaeroidal tungsten of the partial size less than 150 μm
Powder；The forming parameter of the three-dimensional lattice structural model are as follows: sweep current 11mA, scanning speed 0.2m/s, line deflection distance
0.3mm；The forming parameter of the porous body Model are as follows: sweep current 8mA, scanning speed 0.5m/s, line deflection distance 0.3mm；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on,
Then the individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model inputted in step 4
Forming parameter to belong to the region of three-dimensional lattice structural model in each layering tungsten powder carry out selective melting, recycle electronics
Beam simultaneously uses the forming parameter of the porous body Model inputted in step 4 to the tungsten for belonging to the region of porous body Model in each layering
Powder carries out selective sintering, forms single layer entity lamella, by forming bottom plate decline；In the powdering thickness and step 3 of the tungsten powder
The thickness of each layer slice is identical；The powdering of the tungsten powder is with a thickness of 30 μm；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate declines work
Skill forms POROUS TUNGSTEN material forming part until each single layer entity lamella is successively accumulated；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam constituency
It melts in the forming cavity of former and is passed through protective gas to accelerate cooling procedure, when the bottom of electron beam selective melting former
When plate temperature is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then removes POROUS TUNGSTEN material forming using high pressure gas
Remaining powder in part, obtains POROUS TUNGSTEN material.
Fig. 4 is the microstructure figure of POROUS TUNGSTEN material manufactured in the present embodiment, and a-quadrant is three-dimensional lattice structure, the area B in figure
Domain is porous structure, and the three-dimensional lattice inside configuration of POROUS TUNGSTEN material manufactured in the present embodiment is uniformly filled out as can be seen from Figure 4
Filled with porous body, the tungsten powder fusing for forming three-dimensional lattice structure is complete, being tightly combined between tungsten-tungsten particle interface, and tungsten powder table
The sintering neck that face bonds the porous body to be formed is complete.
Embodiment 2
The POROUS TUNGSTEN material of the present embodiment is by three-dimensional lattice structure and the porous body being filled in three-dimensional lattice structure hole
Composition, the size of POROUS TUNGSTEN material are 20mm × 20mm × 20mm, porosity 22%, the electron beam subregion of the POROUS TUNGSTEN material
Scan manufacturing process the following steps are included:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software；The ruler of the three-dimensional lattice structural model
Very little is 20mm × 20mm × 20mm, porosity 90%；
Step 2: establishing porous body mould according to the internal void region for the three-dimensional lattice structural model established in step 1
Type；
Step 3: the porous body model combination that will be established in the three-dimensional lattice structural model established in step 1 and step 2
POROUS TUNGSTEN material model is obtained, then layered shaping is carried out along the short transverse of POROUS TUNGSTEN material model, obtains individual-layer data；Institute
Stating each layering that layered shaping obtains includes belonging to the region of three-dimensional lattice structural model and belonging to the region of porous body Model；
Each layer that the layered shaping obtains slice with a thickness of 30 μm；
It is set Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting forming
In standby, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder is packed into input forming
In the powder case of the electron beam selective melting former of parameter, and by the forming bottom plate tune of electron beam selective melting former
It is flat, its vacuum degree is evacuated to less than 0.5 × 10 to the forming cavity of electron beam selective melting former-2Pa, using electron beam
The temperature for carrying out being preheated to forming bottom plate to forming bottom plate is 400 DEG C；The tungsten powder is globular tungsten powder of the partial size less than 150 μm；
The forming parameter of the three-dimensional lattice structural model are as follows: sweep current 11mA, scanning speed 0.2m/s, line deflection distance 0.3mm；
The forming parameter of the porous body Model are as follows: sweep current 10mA, scanning speed 0.3m/s, line deflection distance 0.1mm；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on,
Then the individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model inputted in step 4
Forming parameter to belong to the region of three-dimensional lattice structural model in each layering tungsten powder carry out selective melting, recycle electronics
Beam simultaneously uses the forming parameter of the porous body Model inputted in step 4 to the tungsten for belonging to the region of porous body Model in each layering
Powder carries out selective sintering, forms single layer entity lamella, by forming bottom plate decline；In the powdering thickness and step 3 of the tungsten powder
The thickness of each layer slice is identical；The powdering of the tungsten powder is with a thickness of 30 μm；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate declines work
Skill forms POROUS TUNGSTEN material forming part until each single layer entity lamella is successively accumulated；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam constituency
It melts in the forming cavity of former and is passed through protective gas to accelerate cooling procedure, when the bottom of electron beam selective melting former
When plate temperature is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then removes POROUS TUNGSTEN material forming using high pressure gas
Remaining powder in part, obtains POROUS TUNGSTEN material.
Embodiment 3
The POROUS TUNGSTEN material of the present embodiment is by three-dimensional lattice structure and the porous body being filled in three-dimensional lattice structure hole
Composition, the size of POROUS TUNGSTEN material are 20mm × 20mm × 20mm, porosity 20%, the electron beam subregion of the POROUS TUNGSTEN material
Scan manufacturing process the following steps are included:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software；The ruler of the three-dimensional lattice structural model
Very little is 20mm × 20mm × 20mm, porosity 80%；
Step 2: establishing porous body mould according to the internal void region for the three-dimensional lattice structural model established in step 1
Type；
Step 3: the porous body model combination that will be established in the three-dimensional lattice structural model established in step 1 and step 2
POROUS TUNGSTEN material model is obtained, then layered shaping is carried out along the short transverse of POROUS TUNGSTEN material model, obtains individual-layer data；Institute
Stating each layering that layered shaping obtains includes belonging to the region of three-dimensional lattice structural model and belonging to the region of porous body Model；
Each layer that the layered shaping obtains slice with a thickness of 100 μm；
It is set Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting forming
In standby, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder is packed into input forming
In the powder case of the electron beam selective melting former of parameter, and by the forming bottom plate tune of electron beam selective melting former
It is flat, its vacuum degree is evacuated to less than 0.5 × 10 to the forming cavity of electron beam selective melting former-2Pa, using electron beam
The temperature for carrying out being preheated to forming bottom plate to forming bottom plate is 800 DEG C；The tungsten powder is subsphaeroidal tungsten of the partial size less than 150 μm
Powder；The forming parameter of the three-dimensional lattice structural model are as follows: sweep current 15mA, scanning speed 0.1m/s, line deflection distance
0.1mm；The forming parameter of the porous body Model are as follows: sweep current 10mA, scanning speed 0.3m/s, line deflection distance 0.1mm；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on,
Then the individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model inputted in step 4
Forming parameter to belong to the region of three-dimensional lattice structural model in each layering tungsten powder carry out selective melting, recycle electronics
Beam simultaneously uses the forming parameter of the porous body Model inputted in step 4 to the tungsten for belonging to the region of porous body Model in each layering
Powder carries out selective sintering, forms single layer entity lamella, by forming bottom plate decline；In the powdering thickness and step 3 of the tungsten powder
The thickness of each layer slice is identical；The powdering of the tungsten powder is with a thickness of 100 μm；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate declines work
Skill forms POROUS TUNGSTEN material forming part until each single layer entity lamella is successively accumulated；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam constituency
It melts in the forming cavity of former and is passed through protective gas to accelerate cooling procedure, when the bottom of electron beam selective melting former
When plate temperature is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then removes POROUS TUNGSTEN material forming using high pressure gas
Remaining powder in part, obtains POROUS TUNGSTEN material.
Embodiment 4
The POROUS TUNGSTEN material of the present embodiment is by three-dimensional lattice structure and the porous body being filled in three-dimensional lattice structure hole
Composition, the size of POROUS TUNGSTEN material are 20mm × 20mm × 20mm, porosity 24%, the electron beam subregion of the POROUS TUNGSTEN material
Scan manufacturing process the following steps are included:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software；The ruler of the three-dimensional lattice structural model
Very little is 20mm × 20mm × 20mm, porosity 80%；
Step 2: establishing porous body mould according to the internal void region for the three-dimensional lattice structural model established in step 1
Type；
Step 3: the porous body model combination that will be established in the three-dimensional lattice structural model established in step 1 and step 2
POROUS TUNGSTEN material model is obtained, then layered shaping is carried out along the short transverse of POROUS TUNGSTEN material model, obtains individual-layer data；Institute
Stating each layering that layered shaping obtains includes belonging to the region of three-dimensional lattice structural model and belonging to the region of porous body Model；
Each layer that the layered shaping obtains slice with a thickness of 100 μm；
It is set Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting forming
In standby, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder is packed into input forming
In the powder case of the electron beam selective melting former of parameter, and by the forming bottom plate tune of electron beam selective melting former
It is flat, its vacuum degree is evacuated to less than 1 × 10 to the forming cavity of electron beam selective melting former-2Pa, using electron beam pair
The temperature that forming bottom plate carries out being preheated to forming bottom plate is 800 DEG C；The tungsten powder is sphere-like tungsten powder of the partial size less than 150 μm；
The forming parameter of the three-dimensional lattice structural model are as follows: sweep current 15mA, scanning speed 0.1m/s, line deflection distance 0.1mm；
The forming parameter of the porous body Model are as follows: sweep current 8mA, scanning speed 0.5m/s, line deflection distance 0.3mm；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on,
Then the individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model inputted in step 4
Forming parameter to belong to the region of three-dimensional lattice structural model in each layering tungsten powder carry out selective melting, recycle electronics
Beam simultaneously uses the forming parameter of the porous body Model inputted in step 4 to the tungsten for belonging to the region of porous body Model in each layering
Powder carries out selective sintering, forms single layer entity lamella, by forming bottom plate decline；In the powdering thickness and step 3 of the tungsten powder
The thickness of each layer slice is identical；The powdering of the tungsten powder is with a thickness of 100 μm；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate declines work
Skill forms POROUS TUNGSTEN material forming part until each single layer entity lamella is successively accumulated；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam constituency
It melts in the forming cavity of former and is passed through protective gas to accelerate cooling procedure, when the bottom of electron beam selective melting former
When plate temperature is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then removes POROUS TUNGSTEN material forming using high pressure gas
Remaining powder in part, obtains POROUS TUNGSTEN material.
Embodiment 5
The POROUS TUNGSTEN material of the present embodiment is by three-dimensional lattice structure and the porous body being filled in three-dimensional lattice structure hole
Composition, the size of POROUS TUNGSTEN material are 20mm × 20mm × 20mm, porosity 23%, the electron beam subregion of the POROUS TUNGSTEN material
Scan manufacturing process the following steps are included:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software；The ruler of the three-dimensional lattice structural model
Very little is 20mm × 20mm × 20mm, porosity 85%；
Step 2: establishing porous body mould according to the internal void region for the three-dimensional lattice structural model established in step 1
Type；
Step 3: the porous body model combination that will be established in the three-dimensional lattice structural model established in step 1 and step 2
POROUS TUNGSTEN material model is obtained, then layered shaping is carried out along the short transverse of POROUS TUNGSTEN material model, obtains individual-layer data；Institute
Stating each layering that layered shaping obtains includes belonging to the region of three-dimensional lattice structural model and belonging to the region of porous body Model；
Each layer that the layered shaping obtains slice with a thickness of 50 μm；
It is set Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting forming
In standby, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder is packed into input forming
In the powder case of the electron beam selective melting former of parameter, and by the forming bottom plate tune of electron beam selective melting former
Flat, being evacuated to its vacuum degree to the forming cavity of electron beam selective melting former is less than 1 × 10-2Pa, using electron beam
The temperature for carrying out being preheated to forming bottom plate to forming bottom plate is 500 DEG C；The tungsten powder is globular tungsten powder of the partial size less than 150 μm；
The forming parameter of the three-dimensional lattice structural model are as follows: sweep current 12mA, scanning speed 0.15m/s, line deflection distance
0.2mm；The forming parameter of the porous body Model are as follows: sweep current 9mA, scanning speed 0.4m/s, line deflection distance 0.2mm；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on,
Then the individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model inputted in step 4
Forming parameter to belong to the region of three-dimensional lattice structural model in each layering tungsten powder carry out selective melting, recycle electronics
Beam simultaneously uses the forming parameter of the porous body Model inputted in step 4 to the tungsten for belonging to the region of porous body Model in each layering
Powder carries out selective sintering, forms single layer entity lamella, by forming bottom plate decline；In the powdering thickness and step 3 of the tungsten powder
The thickness of each layer slice is identical；The powdering of the tungsten powder is with a thickness of 50 μm；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate declines work
Skill forms POROUS TUNGSTEN material forming part until each single layer entity lamella is successively accumulated；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam constituency
It melts in the forming cavity of former and is passed through protective gas to accelerate cooling procedure, when the bottom of electron beam selective melting former
When plate temperature is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then removes POROUS TUNGSTEN material forming using high pressure gas
Remaining powder in part, obtains POROUS TUNGSTEN material.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way.It is all according to invention skill
Art any simple modification, change and equivalence change substantially to the above embodiments, still fall within technical solution of the present invention
Protection scope in.
Claims (6)
1. a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material, the POROUS TUNGSTEN material is by three-dimensional lattice structure and fills out
Fill the porous body composition in three-dimensional lattice structure hole, which is characterized in that method includes the following steps:
Step 1: establishing three-dimensional lattice structural model using 3 d modeling software；
Step 2: establishing porous body Model according to the internal void region for the three-dimensional lattice structural model established in step 1；
Step 3: the three-dimensional lattice structural model established in step 1 and the porous body model combination established in step 2 are obtained
Then POROUS TUNGSTEN material model carries out layered shaping along the short transverse of POROUS TUNGSTEN material model, obtains individual-layer data；Described point
Each layering that layer processing obtains includes belonging to the region of three-dimensional lattice structural model and belonging to the region of porous body Model；
Step 4: treated POROUS TUNGSTEN material model layered in step 3 is imported electron beam selective melting former
In, the forming parameter of three-dimensional lattice structural model and porous body Model is then inputted respectively, then tungsten powder loading is entered as parameter
In the powder case of several electron beam selective melting formers, and the forming bottom plate of electron beam selective melting former is leveled,
Its vacuum degree is evacuated to less than 1 × 10 to the forming cavity of electron beam selective melting former-2Pa, using electron beam to forming
Bottom plate is preheated；
Step 5: by the tungsten powder being fitted into step 4 in powder case be laid in step 4 it is preheated after forming bottom plate on, then
The individual-layer data according to obtained in step 3, using electron beam and using the three-dimensional lattice structural model that inputs in step 4 at
Shape parameter carries out selective melting to the tungsten powder for belonging to the region of three-dimensional lattice structural model in each layering, recycles electron beam simultaneously
Using the porous body Model inputted in step 4 forming parameter to belong to the tungsten powder in the region of porous body Model in each layering into
Row selective sintering forms single layer entity lamella, by forming bottom plate decline；Each layer in the powdering thickness and step 3 of the tungsten powder
The thickness of slice is identical；
Step 6: repeating the powdering in step 5, selective scanning fusing, selective sintering and forming bottom plate decline technique, directly
It is successively accumulated to each single layer entity lamella, forms POROUS TUNGSTEN material forming part；
Step 7: when the baseplate temp of electron beam selective melting former is down to 100 DEG C or less, to electron beam selective melting
Protective gas is passed through in the forming cavity of former to accelerate cooling procedure, when the bottom plate temperature of electron beam selective melting former
When degree is down to 50 DEG C or less, POROUS TUNGSTEN material forming part is taken out, then using in high pressure gas removal POROUS TUNGSTEN material forming part
Remaining powder obtains POROUS TUNGSTEN material.
2. a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material according to claim 1, which is characterized in that step
Each layer that layered shaping described in rapid three obtains slice with a thickness of 30 μm~100 μm.
3. a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material according to claim 1, which is characterized in that step
Tungsten powder described in rapid four is spherical shape or sphere-like tungsten powder of the partial size less than 150 μm.
4. a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material according to claim 1, which is characterized in that step
Described in rapid four it is preheated after forming bottom plate temperature be 400 DEG C~800 DEG C.
5. a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material according to claim 1, which is characterized in that step
The forming parameter of three-dimensional lattice structural model described in rapid four are as follows: sweep current 11mA~15mA, scanning speed 0.1m/s~
0.2m/s, line deflection distance 0.1mm~0.3mm.
6. a kind of electron beam subarea-scanning manufacturing process of POROUS TUNGSTEN material according to claim 1, which is characterized in that step
The forming parameter of porous body Model described in rapid four are as follows: sweep current 8mA~10mA, scanning speed 0.3m/s~0.5m/s, line
Deflection distance 0.1mm~0.3mm.
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| CN109702200A (en) * | 2019-02-28 | 2019-05-03 | 中国地质大学（武汉） | A kind of W/Cu functionally graded material and preparation method thereof |
| CN110315076A (en) * | 2019-07-23 | 2019-10-11 | 西北有色金属研究院 | A kind of manufacturing process of the high-gravity tungsten based alloy based on pre-alloyed powder |
| CN110564998A (en) * | 2019-10-17 | 2019-12-13 | 西北有色金属研究院 | preparation method of high-density tungsten-based alloy |
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| CN111515402A (en) * | 2020-05-06 | 2020-08-11 | 南宁师范大学 | Preparation method of high-performance contact material |
| CN114247883A (en) * | 2020-09-25 | 2022-03-29 | 安泰科技股份有限公司 | Method for manufacturing refractory metal part with porous structure |
| WO2022199990A1 (en) * | 2021-03-24 | 2022-09-29 | Siemens Energy Global GmbH & Co. KG | Additively manufactured fluid-permeable material structure |
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