CN105499570B - A kind of 3D printing method of the cermet functionally gradient part in alternating magnetic field - Google Patents

A kind of 3D printing method of the cermet functionally gradient part in alternating magnetic field Download PDF

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Publication number
CN105499570B
CN105499570B CN201510990255.1A CN201510990255A CN105499570B CN 105499570 B CN105499570 B CN 105499570B CN 201510990255 A CN201510990255 A CN 201510990255A CN 105499570 B CN105499570 B CN 105499570B
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magnetic field
printing
alternating magnetic
metal
duckbill
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CN105499570A (en
Inventor
周雪莉
刘庆萍
任露泉
赵彻
宋正义
李冰倩
刘清荣
李卓识
刘慧力
于征磊
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Jilin University
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Jilin University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/22—Driving means
    • B22F12/226—Driving means for rotary motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10—Formation of a green body
    • B22F10/18—Formation of a green body by mixing binder with metal in filament form, e.g. fused filament fabrication [FFF]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/50—Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/50—Means for feeding of material, e.g. heads
    • B22F12/53—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2202/00—Treatment under specific physical conditions
    • B22F2202/05—Use of magnetic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2207/00—Aspects of the compositions, gradients
    • B22F2207/11—Gradients other than composition gradients, e.g. size gradients
    • B22F2207/17—Gradients other than composition gradients, e.g. size gradients density or porosity gradients
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention discloses a kind of 3D printing method of the cermet functionally gradient part in alternating magnetic field, the metal material with good electric conductivity produces induced-current because of the consecutive variations in magnetic field in material internal in alternating magnetic field, the different of alternating magnetic field are responded from the ceramics of not easy conductive based on metal material with good conductivity, metal material directional profile is controlled by alternating magnetic field in print procedure, change driving force size by changing alternating current intensity and power frequency, prepare cermet functionally gradient part, realize alternating magnetic field 3D printing metal ceramic gradient part, it can realize that material gradient is distributed in any locus, save material and facility cost, it is adapted to wide popularization and application.

Description

A kind of 3D printing method of the cermet functionally gradient part in alternating magnetic field
Technical field
The invention belongs to the 3D printing technique of mechanical manufacturing field, one kind cermet in alternating magnetic field is related specifically to The 3D printing method of functionally gradient part.
Background technology
3D printing is a kind of using mathematical model as driving source, come constructed object spatial shape by way of successively printing Rapid shaping technique, developed, metal increasing material manufacturing has also reached greatly as increasing material manufacturing is manufactured to function part in recent years Development, the existing selective laser sintering technology of metal 3D printing technique (SLS), precinct laser fusion forming technique (SLM) swashs Light RP technique (LRF) or laser solid forming technology (LSF), this several technology are all operated by laser, most In terms of all resting on single material homogeneous processing, it is impossible to the forming parts of realization and functionally gradient material (FGM), and actually most of parts or production Product are constituted by multiple material, and prior art can not prepare metal and ceramic gradient part, and printing device and material expensive, Printing technology method is complicated, and shaping speed is low.
The content of the invention
The purpose of the present invention can only prepare single material metal part, it is impossible to make aiming at existing metal 3D printing technique Between standby metal or metal ceramic gradient part, and one kind is provided and realizes cermet functionally gradient part with action of alternating magnetic field 3D printing method.
A kind of 3D printing method of the cermet functionally gradient part in alternating magnetic field, its technological principle is with melting Deposition modeling technique, by metal ceramic powder and hot-melt adhesive mixing material deposition modeling, its core technology is in extrusion Before material does not solidify, magnetic particle in material is moved with electromagnetic actuation force, so as to change material composition distribution, finally Prepare functionally gradient material (FGM).
The step of a kind of 3D printing method of cermet functionally gradient part in alternating magnetic field of the present invention, this method It is as follows：
One：The preparation of mixed slurry, is heated, metal paste after metal ceramic powder is uniformly mixed with high polymer binder Melted at 160~200 DEG C, at room temperature can rapid curing；
The constituent and mass percent of the mixed slurry are as follows：
Metal ceramic powder 56-65%, high polymer binder 35-44%；
The constituent and mass percent of metal ceramic powder are as follows：
Metal dust 1-40%, ceramic powders 60-99%；
The metal dust：1-90 μm, median particle diameter is 40 μm；
The metal dust material is Fe or Al or Ag or Mg or Zn or Cu；
The ceramic powders：1-90 μm, median particle diameter is 40 μm；
The ceramic powders material is one kind or wherein several mixed-powder particles in Al2O3, SiC, SiO2, ZrO2；
The constituent and mass percent of high polymer binder are as follows：
Paraffin 65-70%, ethylene-vinyl acetate copolymer 7-12%, polypropylene 18-23%, stearic acid 1-5%.
Two：Data modeling processing, sets up model using three-dimensional software, then carries out slicing treatment, the thickness of synusia is 0.06~0.24mm, sets up the three-dimensional data model of part, and corresponding filling route is set according to required function part；
Three：Fused glass pellet under alternating magnetic field, printing shaping is carried out using fused glass pellet technique, according to printing rail Mark sets corresponding alternating magnetic field at the desired position, and the temperature of rotatable duckbill printing extruder head is 175 DEG C, and speed is 14mm/s, the intensity 0.5A-5A of electric current, power frequency 100-10000HZ, computer control apparatus of the present invention, mixed slurry by Material supply printing equipment delivers to rotatable duckbill printing extruder head, and is heated in rotatable duckbill printing extruder head Molten condition, is then optionally coated on workbench, and processing workpiece interface profile is formed after quick cooling, when being molded Cheng Hou, workbench declines the height of a cross-sectional layers, and rotatable duckbill printing extruder head carries out next layer of printing again, so Circulation, is ultimately formed in product, print procedure, and rotatable duckbill prints extruder head at a certain temperature by with mobility Mixed slurry is extruded according to the track of computer settings and speed, and the metal powder material in molten road is moved rapidly under the influence of a magnetic field Dynamic, the component consecutive variations in molten road, change alternating current intensity and power frequency changes driving force size, in any space bit Put that gradient parameter is controllable, and the anglec of rotation of extruder head is printed by changing rotatable duckbill, obtain the base substrate of various wall thickness；
Four：High polymer binder in base substrate is subjected to removing processing, is solvent degreasing first, base substrate is put into three chloroethenes In alkene solution, the temperature of solution is 30-50 DEG C, and base substrate after drying, is then embedded in alundum (Al2O3) powder by degreasing 8-12h, Overall be put into vacuum atmosphere oven is heat-treated and pre-sintered again, and rate of rise in temperature is 1~3 DEG C/min, and temperature is 500-700 DEG C, the time is 3-4h；
Five：Sintering, pre-sintered base substrate is placed in vacuum atmosphere oven and continues to heat, and programming rate is 4-6 DEG C/min, finally The fusing point of the metal material of temperature and soaking time with sintering is relevant, after the completion of sintering, obtains required graded metal part.
A kind of 3D printing device of cermet functionally gradient part in alternating magnetic field of the present invention：It is by machine tool Body, material supply printing equipment, digitlization alternating magnetic field generator and workbench composition, workbench are fixedly installed on ground On, material supply printing equipment is arranged on bed piece, and digitlization alternating magnetic field generator is arranged on workbench and lathe Between lathe bed.
The operation principle of the present invention：
The metal material with good electric conductivity is produced because of the consecutive variations in magnetic field in material internal in alternating magnetic field Induced-current, it can be seen from Lenz's law, the induced field produced by such a induced-current hinders the change of original magnetic field flux. Therefore, Induced magnetic field can produce power with alternating magnetic field can act power, and power F size is：F=V × M × gradH wherein, V It is particle volume, M is particle induced magnetism intensity, and grad H are magnetic field gradient, and magnetization M is with input current intensity into just Than；Magnetic field gradient is relevant with the location of particle, coil inside, and Distribution of Magnetic Field is uniform, and gradient is zero, end turn, magnetic field Gradient is maximum.
Beneficial effects of the present invention：
The present invention is rung based on metal material with good conductivity from the ceramic material of not easy conductive to the different of alternating magnetic field Should, metal material directional profile is controlled by alternating magnetic field in print procedure, by changing alternating current intensity and electric current frequency Rate changes driving force size, prepares cermet functionally gradient part, realizes alternating magnetic field 3D printing metal ceramic gradient zero Part, can realize that material gradient is distributed in any locus.
Brief description of the drawings
Fig. 1 is the 3D printing apparatus structure schematic diagram of the present invention.
Fig. 2 is the front view that rotatable duckbill of the invention prints extruder head.
Fig. 3 is the left view that rotatable duckbill of the invention prints extruder head.
Fig. 4 is the top view that rotatable duckbill of the invention prints extruder head.
The part section print state schematic diagram that Fig. 5 is printed when being present invention work.
The part section print state schematic diagram that Fig. 6 is printed when being present invention work.
The part section print state schematic diagram that Fig. 7 is printed when being present invention work.
Embodiment
Refer to shown in Fig. 1, Fig. 5, Fig. 6 and Fig. 7, a kind of cermet functionally gradient zero in alternating magnetic field of the present invention The step of 3D printing method of part, this method, is as follows：
One：The preparation of mixed slurry, is heated, metal paste after metal ceramic powder is uniformly mixed with high polymer binder Melted at 160~200 DEG C, at room temperature can rapid curing；
The constituent and mass percent of the mixed slurry are as follows：
Metal ceramic powder 56-65%, high polymer binder 35-44%；
The constituent and mass percent of metal ceramic powder are as follows：
Metal dust 1-40%, ceramic powders 60-99%；
The metal dust：1-90 μm, median particle diameter is 40 μm；
The metal dust material is Fe or Al or Ag or Mg or Zn or Cu；
The ceramic powders：1-90 μm, median particle diameter is 40 μm；
The ceramic powders material is one kind or wherein several mixed-powder particles in Al2O3, SiC, SiO2, ZrO2；
The constituent and mass percent of high polymer binder are as follows：
Paraffin 65-70%, ethylene-vinyl acetate copolymer 7-12%, polypropylene 18-23%, stearic acid 1-5%.
Two：Data modeling processing, sets up model using three-dimensional software, then carries out slicing treatment, the thickness of synusia is 0.06~0.24mm, sets up the three-dimensional data model of part, and corresponding filling route is set according to required function part；
Three：Fused glass pellet under alternating magnetic field, printing shaping is carried out using fused glass pellet technique, according to printing rail Mark sets corresponding alternating magnetic field at the desired position, and the temperature of rotatable duckbill printing extruder head 21 is 175 DEG C, and speed is 14mm/s, the intensity 0.5A-5A of electric current, power frequency 100-10000HZ, computer control apparatus of the present invention, mixed slurry by Material supply printing equipment 2 delivers to rotatable duckbill printing extruder head 21, and in rotatable duckbill printing extruder head 21 Molten condition is heated to, then optionally extrusion is deposited on workbench 4, processing workpiece interface wheel is formed after quick cooling Exterior feature, after the completion of shaping, workbench 4 declines the height of a cross-sectional layers, and rotatable duckbill printing extruder head 21 is carried out down again One layer of printing, so circulation, are ultimately formed in product, print procedure, and rotatable duckbill prints extruder head 21 in a constant temperature The mixed slurry with mobility is extruded according to the track of computer settings and speed under degree, the metal powder material in molten road exists Moved rapidly in the presence of magnetic field, the component consecutive variations in molten road, change alternating current intensity and power frequency changes driving Power size, it is controllable in any locus gradient parameter, and by changing the anglec of rotation of rotatable duckbill printing extruder head, Obtain the base substrate of various wall thickness；
Four：High polymer binder in base substrate is subjected to removing processing, is solvent degreasing first, base substrate is put into three chloroethenes In alkene solution, the temperature of solution is 30-50 DEG C, and base substrate after drying, is then embedded in alundum (Al2O3) powder by degreasing 8-12h, Overall be put into vacuum atmosphere oven is heat-treated and pre-sintered again, and rate of rise in temperature is 1~3 DEG C/min, and temperature is 500-700 DEG C, the time is 3-4h；
Five：Sintering, pre-sintered base substrate is placed in vacuum atmosphere oven and continues to heat, and programming rate is 4-6 DEG C/min, finally The fusing point of the metal material of temperature and soaking time with sintering is relevant, after the completion of sintering, obtains required graded metal part.
A kind of 3D printing device of cermet functionally gradient part in alternating magnetic field of the present invention：It is by bed piece 1st, material supply printing equipment 2, digitlization alternating magnetic field generator 3 and workbench 4 are constituted, and workbench 4 is fixedly installed on On ground, material supply printing equipment 2 is arranged on bed piece 1, and digitlization alternating magnetic field generator 3 is arranged on workbench Between 4 and bed piece 1.
Instantiation 1：
Refer to shown in Fig. 1, Fig. 5, Fig. 6 and Fig. 7, a kind of cermet functionally gradient zero in alternating magnetic field of the present invention The step of 3D printing method of part, this method, is as follows：
One：The preparation of mixed slurry, is heated, mixed slurry after metal ceramic powder is uniformly mixed with high polymer binder Melted at 170 DEG C, at room temperature can rapid curing；
The constituent and mass percent of the mixed slurry are as follows：
Metal ceramic powder 60%, high polymer binder 40%；
The constituent and mass percent of metal ceramic powder are as follows：
Metal dust 33%, ceramic powders 67%；
The metal dust：1-90 μm, median particle diameter is 40 μm；
The metal dust material is Cu；
The ceramic powders：1-90 μm, median particle diameter is 40 μm；
The ceramic powders material is Al2O3；
The constituent and mass percent of high polymer binder are as follows：
Paraffin 68%, ethylene-vinyl acetate copolymer 10%, polypropylene 19%, stearic acid 3%.
Two：Data modeling processing, sets up model using three-dimensional software, then carries out slicing treatment, the thickness of synusia is 0.2mm, sets up the three-dimensional data model of part, and corresponding filling route is set according to required function part；
Three：Fused glass pellet under alternating magnetic field, printing shaping is carried out using fused glass pellet technique, according to printing rail Mark sets corresponding alternating magnetic field at the desired position, and the temperature of rotatable duckbill printing extruder head 21 is 175 DEG C, and speed is 14mm/s, the intensity 2.5A of electric current, power frequency 1000HZ, computer controls apparatus of the present invention, and mixed slurry is by material supply Printing equipment 2 delivers to rotatable duckbill printing extruder head 21, and is heated to melting in rotatable duckbill printing extruder head 21 Melt state, then optionally extrusion is deposited on workbench 4, processing workpiece interface profile is formed after quick cooling, is treated as After the completion of type, workbench 4 declines the height of a cross-sectional layers, and rotatable duckbill printing extruder head 21 carries out next layer and beaten again Print, so circulation, are ultimately formed in product, print procedure, and rotatable duckbill printing extruder head 21 at a certain temperature will tool The mixed slurry for having mobility is extruded according to the track of computer settings and speed, melts the work of the metal powder material in magnetic field in road With lower rapid movement, the component consecutive variations in molten road, change alternating current intensity and power frequency changes driving force size, Any locus gradient parameter is controllable, and prints the anglec of rotation of extruder head by changing rotatable duckbill, obtains various The base substrate of wall thickness；
Four：High polymer binder in base substrate is subjected to removing processing, is solvent degreasing first, base substrate is put into three chloroethenes In alkene solution, the temperature of solution is 35 DEG C, and base substrate after drying, is then embedded in alundum (Al2O3) powder by degreasing 9h, then overall It is put into vacuum atmosphere oven and is heat-treated and pre-sintered, rate of rise in temperature is 2 DEG C/min, temperature is 600 DEG C, the time is 3.5h；
Five：Sintering, pre-sintered base substrate is placed in vacuum atmosphere oven and continues to heat, and programming rate is 5.5 DEG C/min, finally The fusing point of the metal material of temperature and soaking time with sintering is relevant, after the completion of sintering, obtains required graded metal part.
Instantiation 2：
Refer to shown in Fig. 1, Fig. 5, Fig. 6 and Fig. 7, a kind of cermet functionally gradient zero in alternating magnetic field of the present invention The step of 3D printing method of part, this method, is as follows：
One：The preparation of mixed slurry, is heated, metal paste after metal ceramic powder is uniformly mixed with high polymer binder Melted at 200 DEG C, at room temperature can rapid curing；
The constituent and mass percent of the mixed slurry are as follows：
Metal ceramic powder 63%, high polymer binder 37%；
The constituent and mass percent of metal ceramic powder are as follows：
Metal dust 35%, ceramic powders 65%；
The metal dust：1-90 μm, median particle diameter is 40 μm；
The metal dust material is Fe；
The ceramic powders：1-90 μm, median particle diameter is 40 μm；
The ceramic powders material is SiC；
The constituent and mass percent of high polymer binder are as follows：
Paraffin 66%, ethylene-vinyl acetate copolymer 11%, polypropylene 20%, stearic acid 3%.
Two：Data modeling processing, sets up model using three-dimensional software, then carries out slicing treatment, the thickness of synusia is 0.22mm, sets up the three-dimensional data model of part, and corresponding filling route is set according to required function part；
Three：Fused glass pellet under alternating magnetic field, printing shaping is carried out using fused glass pellet technique, according to printing rail Mark sets corresponding alternating magnetic field at the desired position, and the temperature of rotatable duckbill printing extruder head 21 is 175 DEG C, and speed is 14mm/s, the intensity 3A of electric current, power frequency 1500HZ, computer controls apparatus of the present invention, and mixed slurry is beaten by material supply Printing equipment puts 2 and delivers to rotatable duckbill printing extruder head 21, and is heated to melting in rotatable duckbill printing extruder head 21 State, then optionally extrusion is deposited on workbench 4, and processing workpiece interface profile is formed after quick cooling, works as shaping After the completion of, workbench 4 declines the height of a cross-sectional layers, and rotatable duckbill printing extruder head 21 carries out next layer and beaten again Print, so circulation, are ultimately formed in product, print procedure, and rotatable duckbill printing extruder head 21 at a certain temperature will tool The mixed slurry for having mobility is extruded according to the track of computer settings and speed, melts the work of the metal powder material in magnetic field in road With lower rapid movement, the component consecutive variations in molten road, change alternating current intensity and power frequency changes driving force size, Any locus gradient parameter is controllable, and prints the anglec of rotation of extruder head by changing rotatable duckbill, obtains various The base substrate of wall thickness；
Four：High polymer binder in base substrate is subjected to removing processing, is solvent degreasing first, base substrate is put into three chloroethenes In alkene solution, the temperature of solution is 45 DEG C, and base substrate after drying, is then embedded in alundum (Al2O3) powder by degreasing 11h, then whole Body, which is put into vacuum atmosphere oven, to be heat-treated and pre-sintered, and rate of rise in temperature is 2.5 DEG C/min, and temperature is 650 DEG C, when Between be 3h；
Five：Sintering, pre-sintered base substrate is placed in vacuum atmosphere oven and continues to heat, and programming rate is 6 DEG C/min, most final temperature The fusing point of the metal material of degree and soaking time with sintering is relevant, after the completion of sintering, obtains required graded metal part.
Refer to shown in Fig. 1, a kind of 3D printing dress of cermet functionally gradient part in alternating magnetic field of the present invention Put：It is flat by XY directions numerical control mobile device 1, numerical control quantitative material extrusion mechanism 2, magnetic field and mobile controller 3 and shaping Platform 4 is constituted, and shaped platform 4 is fixedly installed on the ground, and numerical control quantitative material extrusion mechanism 2 is arranged on XY directions numerical control movement dress Put on 1, magnetic field and mobile controller 3 are arranged on shaped platform 4 between XY directions numerical control mobile device 1.
The operation principle of the present invention：
The metal material with good electric conductivity is produced because of the consecutive variations in magnetic field in material internal in alternating magnetic field Induced-current, it can be seen from Lenz's law, the induced field produced by such a induced-current hinders the change of original magnetic field flux. Therefore, Induced magnetic field can produce power with alternating magnetic field can act power, and power F size is：F=V × M × gradH, wherein, V It is particle volume, M is particle induced magnetism intensity, and grad H are magnetic field gradient, and magnetization M is with input current intensity into just Than；Magnetic field gradient is relevant with the location of particle, coil inside, and Distribution of Magnetic Field is uniform, and gradient is zero, end turn, magnetic field Gradient is maximum.

Claims (1)

1. the step of a kind of 3D printing method of the cermet functionally gradient part in alternating magnetic field, this method, is as follows：
One：The preparation of mixed slurry, is heated after metal ceramic powder is uniformly mixed with high polymer binder, and mixed slurry exists Melted at 160 ~ 200 DEG C, at room temperature can rapid curing；
The constituent and mass percent of the mixed slurry are as follows：
Metal ceramic powder 56-65%, high polymer binder 35-44%；
The constituent and mass percent of metal ceramic powder are as follows：
Metal dust 1-40%, ceramic powders 60-99%；
The metal dust：1-90 μm, median particle diameter is 40 μm；
The metal dust material is Fe or Al or Ag or Mg or Zn or Cu；
The ceramic powders：1-90 μm, median particle diameter is 40 μm；
The ceramic powders material is Al2O3、SiC、SiO2、ZrO2In one kind or wherein several；
The constituent and mass percent of high polymer binder are as follows：
Paraffin 65-70%, ethylene-vinyl acetate copolymer 7-12%, polypropylene 18-23%, stearic acid 1-5%；
Two：Data modeling processing, sets up model using three-dimensional software, then carries out slicing treatment, the thickness of synusia for 0.06 ~ 0.24mm, sets up the three-dimensional data model of part, and corresponding filling route is set according to required function gradient parts；
Three：Fused glass pellet under alternating magnetic field, carries out printing shaping using fused glass pellet technique, is existed according to print track The position needed sets corresponding alternating magnetic field, and rotatable duckbill prints extruder head（21）Temperature be 175 DEG C, speed is 14mm/s, the intensity 0.5A-5A of electric current, power frequency 100-10000HZ, computer control 3D printing device, mixed slurry by Material supply printing equipment（2）Deliver to rotatable duckbill printing extruder head（21）, and print extruder head in rotatable duckbill （21）In be heated to molten condition, then optionally extrusion be deposited on workbench（4）On, processing work is formed after quick cooling Part cross section profile, after the completion of shaping, workbench（4）Decline the height of a cross-sectional layers, rotatable duckbill prints extruder head （21）Next layer of printing is carried out again, and so circulation is ultimately formed in product, print procedure, rotatable duckbill printing extrusion Head（21）The mixed slurry with mobility is extruded according to the track of computer settings and speed at a certain temperature, road is melted Metal powder material is moved rapidly under the influence of a magnetic field, the component consecutive variations in molten road, changes alternating current intensity and electricity Frequency shift driving force size is flowed, it is controllable in any locus gradient parameter, and print crowded by changing rotatable duckbill The anglec of rotation lifted one's head, obtains the base substrate of various wall thickness；
Four：High polymer binder in base substrate is subjected to removing processing, is solvent degreasing first, it is molten that base substrate is put into trichloro ethylene In liquid, the temperature of solution is 30-50 DEG C, and base substrate after drying, is then embedded in alundum (Al2O3) powder by degreasing 8-12h, then whole Body, which is put into vacuum atmosphere oven, to be heat-treated and pre-sintered, and rate of rise in temperature is 1 ~ 3 DEG C/min, and temperature is 500-700 DEG C, the time is 3-4h；
Five：Sintering, pre-sintered base substrate is placed in vacuum atmosphere oven and continues to heat, and programming rate is 4-6 DEG C/min, final temperature The fusing point of metal material with soaking time with sintering is relevant, after the completion of sintering, obtains required functionally gradient part.
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CN105881695A (en) * 2016-05-26 2016-08-24 东莞劲胜精密组件股份有限公司 3D printing method of zirconium dioxide powder material, 3D printing device with binder injection device and binder injection device used for 3D printing method of zirconium dioxide powder material
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