CN108284226A - A kind of electronic package shell 3D printing increasing material manufacturing method - Google Patents
A kind of electronic package shell 3D printing increasing material manufacturing method Download PDFInfo
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- CN108284226A CN108284226A CN201810301297.3A CN201810301297A CN108284226A CN 108284226 A CN108284226 A CN 108284226A CN 201810301297 A CN201810301297 A CN 201810301297A CN 108284226 A CN108284226 A CN 108284226A
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- 239000000463 material Substances 0.000 title claims abstract description 36
- 238000010146 3D printing Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 51
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 230000032798 delamination Effects 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000011812 mixed powder Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 239000004411 aluminium Substances 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004663 powder metallurgy Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 20
- 238000012360 testing method Methods 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 206010068052 Mosaicism Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004100 electronic packaging Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000009715 pressure infiltration Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009716 squeeze casting Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
- B22F12/10—Auxiliary heating means
- B22F12/13—Auxiliary heating means to preheat the material
-
- B22F1/0003—
-
- 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
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- 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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
-
- 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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
-
- 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
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/66—Treatment of workpieces or articles after build-up by mechanical means
-
- 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
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/68—Cleaning or washing
-
- 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
- B22F12/60—Planarisation devices; Compression devices
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE 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
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE 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
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of electronic package shell 3D printing increasing material manufacturing methods, and powder metallurgy raw material are uniformly mixed into using high-volume fractional silicon-carbide particle and aluminium powder, net to shape integral structure SiCp/Al composite material casings using 3D printing increases material manufacturing technology.It is modified pretreatment by carrying out surface to silicon-carbide particle, solves the problems, such as that the wetability between silicon-carbide particle and molten aluminum is poor, contact angle changes into 57 ° by 118 °.Manufactured shell density is small, bending resistance and compression strength are high, thermal conductivity is high, coefficient of thermal expansion is small, uniform ingredients and the defects of flawless, dimensional accuracy and roughness have reached design specification requirement, and guarantee is provided for quick manufacture of batch of aerospace field equipment electronic package shell.
Description
Technical field
The present invention relates to a kind of electronic package shell manufacturing methods, more particularly to a kind of to manufacture electronics using 3D printing technique
The manufacturing method of encapsulating housing.
Background technology
Electronic package shell structure is as shown in Figure 1, it is desirable that encapsulating material is with lightweight, heat superconducting, low bulk and with one
The features such as fixed strength and stiffness, it is respective excellent that high-volume fractional silicon-carbide particle reinforced aluminium-base composite material has both SiC and Al
Point has excellent thermophysical property and mechanical property, and density is relatively low, is ideal electronic package material.
But since the high brittleness of itself hardness is big, it is difficult to be processed into required shape shell by secondary mechanical.Tradition
The preparation process of electronic package shell is to prepare siding material first, then weld together as shell with substrate.Due to base
Weldability is very poor between plate material and high silicon carbide aluminium composite material, and Nickel Plating Treatment is needed before welding, so cost is higher and exists
Big welding stress is easy to cause crack initiation and other airtight sex chromosome mosaicisms.Without pressure or infiltration by squeeze casting and it is stirred casting skill
Art can be with near-net-shape shell, but the composite material consistency prepared by infiltration is relatively low, is stirred SiC when prepared by foundry engieering
The volume fraction of particle is restricted, and is usually no more than 20%.Seriously constrain the application and development of the material.
Invention content
In view of the above technical problems, a kind of electronic package shell 3D printing increasing material manufacturing method of present invention offer, including with
Lower step：
S1 establishes electronic package shell threedimensional model；
S2 formulates increasing material manufacturing scheme according to the threedimensional model of foundation；
S3 pre-processes silicon-carbide particle；
Metallurgical raw material powder is made by mixing in silicon-carbide particle and aluminium powder by S4；
S5 manufactures the shell according to the increasing material manufacturing scheme of formulation on substrate；
S6 detaches the shell from substrate cut；
S7 post-processes shell.
Further, step S1 is specifically included：
S101 establishes the shell threedimensional model using three-dimensional software；
Shell model is carried out format conversion by S102 in three-dimensional software, generates stl file.
Further, step S2 is specifically included：
S201 creates gallery model using Magic softwares；
Stl file comprising Shell model is imported Magic softwares by S202；
S203 repairs Shell model in Magic softwares；
Shell model is oriented in Magic softwares and is placed in suitable position in substrate model by S204；
S205, to model buildings processing support in Magic softwares；
S206 carries out slicing delamination operation to the Shell model and the processing support, and generates CLI format synusia files；
CLI format synusia files are imported filling software by S207；
S208 plans that laser beam scan path fills every layer of slicing layer in filling software, and exports the CLI lattice for including filling information
Formula synusia file；
The CLI format synusia files comprising filling information are imported 3D printing equipment by S209；
S210 sets the Fabrication parameter that the 3D printing equipment uses.
Further, Fabrication parameter described in S210 is specially：
Laser spot diameter is 0.02mm-0.07mm, laser power 0.06kw-0.4kw, laser scanning speed 1m/s-5m/s,
Laser lap rate is 30%-70%, and slicing layer thickness is 0.02mm-0.10mm.
Further, carrying out pretreated concrete operations to SiC particulate in step S3 is：Silicon-carbide particle is heated up with stove
It comes out of the stove to 1100 DEG C of heat preservation 2h and is air-cooled to room temperature.
Further, metallurgical raw material powder technology is made by mixing with Al powder in SiC particulate in step S4 is：
With the percentages of volume fraction, SiC particulate volume fraction is that 40% ~ 63%, average grain diameter is 47 μm, Al powder fractions
It is 30 μm for 60% ~ 37%, average grain diameter, two kinds of powder is put into the rotating speed mixing 2h in V-type batch mixer with 20rpm.
Further, step S5 the specific steps are：
S501 clears up 3D printing equipment working chamber；
S502 corrects scraper levelness；
S503, installation base plate are simultaneously packed into mixed metallurgical raw material powder into powder feeding cylinder；
S504 closes working chamber's door, vacuumizes and pours the argon gas for preventing metal from aoxidizing；
S505, powdering scraper is first the powder for forming a thickness on the flat-pushing substrate to working chamber of mixed-powder；
S506, on filling contour line selective melting substrate of the laser beam by the current layer for including in the CLI formats synusia file
Powder, process current layer；
S507, formation cylinder decline the distance of a slicing layer thickness, and scraper retracts original position, and powder feeding cylinder rises a slicing layer thickness
Distance, powdering scraper send the metallurgical raw material powder of a slicing layer thickness on manufactured current layer upper berth again；
S508, the data that the 3D printing equipment calls in next layer of profile carry out selective laser fusing forming；
S509, the 3D printing equipment judge whether that completing the shell prints, if otherwise return to step S507, if it is
Terminate printing.
Further, step S7 the specific steps are：
S701 takes out together with substrate and the shell from molding room, the residual metallic powder in vibratory cleaning shell；
S702 detaches the shell from substrate, and removes support；
S703 carries out stress relief annealing process to the shell of removal support；
S704 carries out product inspection to the shell post-processed.
Using above-mentioned technical proposal, advantageous effect is caused by the present invention：
The present invention shapes 3D printing using integral structure and manufactures effective solution high-volume fractional SiCp/Al Electronic Packaging shells only
Body manufacturing cost is high, the problem of being difficult to promote and apply, and avoids welding cracking and weld seam has hole.With technique stream
The features such as journey is short, forming efficiency is high, and prepared shell crystal grain is tiny, uniform ingredients.For aerospace field equipment electronic seal
The preparation of dress shell provides batch method for fast mfg.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the structure chart of electronic package shell；
Fig. 2 is middle casing 3D printing increasing material manufacturing method and process flow chart of the present invention；
Fig. 3（a）It is in embodiment before the processing of SiC particle high-temperatures oxidative deactivation, is (b) at SiC particle high-temperature oxidative deactivations
After reason, it is (c) that in figure 1. EDS analysis results are located in position, is (d) that in figure 2. EDS analysis results are located in position；
Fig. 4 is the microscopic structure of shell；
Fig. 5 is fracture apperance of the case material after three point bending test is broken under scanning electron microscope；
Fig. 6 is local fracture apperance amplification.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention：
As shown in Fig. 2, a kind of electronic package shell 3D printing increasing material manufacturing method of the present invention includes the following steps：
S1 establishes electronic package shell threedimensional model；
S2 formulates increasing material manufacturing scheme according to the threedimensional model of foundation；
S3 pre-processes silicon-carbide particle；
Metallurgical raw material powder is made by mixing in silicon-carbide particle and aluminium powder by S4；
S5 manufactures the shell according to the increasing material manufacturing scheme of formulation on substrate；
S6 detaches the shell from substrate cut；
S7 post-processes shell.
Embodiment 1：
In the present embodiment, step S1 is specifically included：
S101 establishes the shell threedimensional model using three-dimensional software；
Shell model is carried out format conversion by S102 in three-dimensional software, generates stl file.
Step S2 is specifically included：
S201 creates gallery model using Magic softwares；
Stl file comprising Shell model is imported Magic softwares by S202；
S203 repairs Shell model in Magic softwares；
Shell model is oriented in Magic softwares and is placed in suitable position in substrate model by S204；
S205, to model buildings processing support in Magic softwares；
S206 carries out slicing delamination operation to the Shell model and the processing support, and generates CLI format synusia files；
CLI format synusia files are imported filling software by S207；
S208 plans that laser beam scan path fills every layer of slicing layer in filling software, and exports the CLI lattice for including filling information
Formula synusia file；
The CLI format synusia files comprising filling information are imported 3D printing equipment by S209；
S210 sets the Fabrication parameter that the 3D printing equipment uses, and in the present embodiment, Fabrication parameter is laser facula
A diameter of 0.04mm, laser power 0.4kw, laser scanning speed 1m/s, laser lap rate are 30%, and slice thickness is
0.04mm。
Carrying out pretreated concrete operations to SiC particulate in step S3 is：Silicon-carbide particle is warming up to 1100 DEG C with stove
Heat preservation 2h, which comes out of the stove, is air-cooled to room temperature.
SiC particulate high-temperature oxydation Passivation Treatment traversing of probe electron microscope SEM patterns, such as Fig. 3 (a) and Fig. 3 (b) institutes
Show.Untreated original SiC grain corner is clear, as shown in Fig. 3 (a)；And after high temperature oxidation process, corner angle are aoxidized blunt
Change, in Surface Realize SiO2Film, as shown in Fig. 3 (b).
The shape of particle has the performance of material important influence.Exist in sharp corner with angular SiC particles
Stronger stress concentration, and the stress concentration in deformation process, it is easy to hole occur in sharp corner and be nucleated and extend to material
Failure.Therefore, should particle be subjected to high-temperature oxydation Passivation Treatment before material preparation, to eliminate too small wedge angle, while high temperature oxygen
Change can improve SiC particles and the wetabilitys of Al between the two.The chemical property of SiC particles is stablized, the contact with Al
Angle is 118 ° (90 ° of ＞).It is that wetability is handled between the two for simplest improvement to carry out oxidation pre-treatment to SiC particles
Method makes particle surface generate one layer of SiO2, SiO2It is reacted with matrix, 4Al+3SiO2→2A12O3+ 3Si, A12O3With
Si is good with Al matrix wetabilitys, and the contact angle of Si and Al are 57 °, to change the wetability of particle and matrix, simultaneously
Moisture, gas and impurity of particle surface layer absorption etc. can be removed and eliminate too small wedge angle, raising prepares the comprehensive of material
Energy.
In the present embodiment, metallurgical raw material powder technology is made by mixing with Al powder in SiC particulate in step S4 is：
SiC particulate volume fraction is 63%, average grain diameter is 47 μm, and Al powder fractions are 37%, average grain diameter is 30 μm, by two
Kind powder is put into the rotating speed mixing 2h in V-type batch mixer with 20rpm.
Step S5 the specific steps are：
S501 clears up 3D printing equipment working chamber, ensures free from foreign meter and other metal powders in working chamber；
S502 corrects scraper levelness；
S503, installation base plate and the metallurgical raw material that mixed high-volume fractional SiC particulate and Al powder are packed into powder feeding cylinder
Powder；
S504 closes working chamber's door, vacuumizes and pours the argon gas for preventing metal from aoxidizing；
S505, powdering scraper is first the powder for forming a thickness on the flat-pushing substrate to working chamber of mixed-powder；
S506, on filling contour line selective melting substrate of the laser beam by the current layer for including in the CLI formats synusia file
Powder, process current layer；
S507, formation cylinder decline the distance of a slicing layer thickness, and scraper retracts original position, and powder feeding cylinder rises a slicing layer thickness
Distance, powdering scraper send the metallurgical raw material powder of a slicing layer thickness on manufactured current layer upper berth again；
S508, the data that the 3D printing equipment calls in next layer of profile carry out selective laser fusing forming；
S509, the 3D printing equipment judge whether that completing the shell prints, if otherwise return to step S507, if it is
Terminate printing.
Step S7 the specific steps are：
S701 takes out together with substrate and the shell from molding room, the residual metallic powder in vibratory cleaning shell；
S702 detaches the shell from substrate, and removes support；
S703 carries out stress relief annealing process to the shell of removal support；
S704 carries out product inspection to the shell post-processed.
After testing, the bending strength of 63vol%SiC/Al case materials is 437MPa, and compression strength is up to 685.1 MPa.
Internal metallographic structure is as shown in figure 4, fracture apperance such as Fig. 5 and Fig. 6 institutes after three point bending test is broken under scanning electron microscope
Show, there are the brittleness generated when caused dimple when Al base fractures and SiC particulate are broken to dissociate step for fracture.Main faults shape
Formula is the brittleness transgranular fracture of SiC particulate, while with the ductile rupture mixed mode of Al matrixes.
Embodiment 2：
As different from Example 1, metallurgical raw material powder work is made by mixing in step S4 in SiC particulate and Al powder by the present embodiment
Skill is：
SiC particulate volume fraction is 56%, average grain diameter is 47 μm, and Al powder fractions are 44%, average grain diameter is 30 μm, by two
Kind powder is put into the rotating speed mixing 2h in V-type batch mixer with 20rpm.
Other steps are same as Example 1.
After testing, the bending strength of 56vol%SiC/Al case materials is 401.6MPa, and compression strength is up to 496.2MPa.
Embodiment 3：
As different from Example 1, metallurgical raw material powder work is made by mixing in step S4 in SiC particulate and Al powder by the present embodiment
Skill is：
SiC particulate volume fraction is 40%, average grain diameter is 47 μm, and Al powder fractions are 60%, average grain diameter is 30 μm, by two
Kind powder is put into the rotating speed mixing 2h in V-type batch mixer with 20rpm.
Other steps are same as Example 1.
After testing, the bending strength of 40vol%SiC/Al case materials is 347.5MPa, and compression strength is up to 350.1MPa.
Table 1 lists 3 specific embodiments and uses 3D printing increasing material manufacturing technique and pressure-free impregnation, Pressure Infiltration, extruding
The performance of different SiC volume fractions aluminium base encapsulating housing materials prepared by casting, powder injection forming and Quickcast techniques
Compare.It can be seen that the superiority of its performance.
1 SiC of tablep/ Al Composite performance comparisons
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the present invention design and
Range is defined.Under the premise of not departing from design concept of the present invention, ordinary people in the field is to technical scheme of the present invention
The all variations and modifications made, should all drop into protection scope of the present invention, the claimed technology contents of the present invention,
It all records in detail in the claims.
Claims (8)
1. a kind of electronic package shell 3D printing increasing material manufacturing method, which is characterized in that include the following steps：
S1 establishes electronic package shell threedimensional model；
S2 formulates 3D printing increasing material manufacturing scheme according to the threedimensional model of foundation；
S3 pre-processes SiC particulate；
Metallurgical raw material powder is made by mixing in SiC particulate and Al powder by S4；
S5 manufactures the shell according to the 3D printing increasing material manufacturing scheme of formulation on substrate；
The shell is cut separation by S6 from the substrate；
S7 post-processes shell.
2. 3D printing increasing material manufacturing method as described in claim 1, which is characterized in that step S1 is specifically included：
S101 establishes the shell dead size threedimensional model using three-dimensional software；
Shell model is carried out format conversion by S102 in three-dimensional software, generates stl file.
3. 3D printing increasing material manufacturing method as claimed in claim 2, which is characterized in that step S2 is specifically included：
S201 creates gallery model using Magic softwares；
The stl file comprising Shell model is imported Magic softwares by S202；
S203 revises reparation Shell model in Magic softwares；
Shell model is oriented in Magic softwares and is placed in suitable position in substrate model by S204；
S205, to model buildings processing support in Magic softwares；
S206 carries out slicing delamination operation to the Shell model and the processing support, and generates CLI format synusia files；
CLI format synusia files are imported filling software by S207；
S208 plans that laser beam scan path fills every layer of slicing layer in filling software, and exports the CLI lattice for including filling information
Formula synusia file；
The CLI format synusia files comprising filling information are imported 3D printing equipment by S209；
S210 sets the Fabrication parameter that the 3D printing equipment uses.
4. 3D printing increasing material manufacturing method as claimed in claim 3, which is characterized in that Fabrication parameter described in S210 is specific
For：
Laser spot diameter is 0.02mm-0.07mm, laser power 0.06kw-0.4kw, laser scanning speed 1m/s-5m/s,
Laser lap rate is 30%-70%, and slicing layer thickness is 0.02mm-0.10mm.
5. 3D printing increasing material manufacturing method as described in claim 1, which is characterized in that in the step S3 to SiC particulate into
The pretreated concrete operations of row are：Silicon-carbide particle is warming up to 1100 DEG C of heat preservation 2h with stove to come out of the stove and be air-cooled to room temperature.
6. 3D printing increasing material manufacturing method as described in claim 1, which is characterized in that in the step S4 by SiC particulate with
Metallurgical raw material powder technology is made by mixing in Al powder：
With the percentages of volume fraction, SiC particulate volume fraction is that 40% ~ 63%, average grain diameter is 47 μm, Al powder fractions
It is 30 μm for 37% ~ 60%, average grain diameter, two kinds of powder is put into the rotating speed mixing 2h in V-type batch mixer with 20rpm.
7. 3D printing increasing material manufacturing method as claimed in claim 4, which is characterized in that the step S5 the specific steps are：
S501 clears up 3D printing equipment working chamber；
S502 corrects scraper levelness；
S503, installation base plate are simultaneously packed into mixed metallurgical raw material powder into powder feeding cylinder；
S504 closes working chamber's door, vacuumizes and pours the argon gas for preventing metal from aoxidizing；
S505, powdering scraper is first the powder for forming a thickness on the flat-pushing substrate to working chamber of mixed-powder；
S506, on filling contour line selective melting substrate of the laser beam by the current layer for including in the CLI formats synusia file
Powder, process current layer；
S507, formation cylinder decline the distance of a slicing layer thickness, and scraper retracts original position, and powder feeding cylinder rises a slicing layer thickness
Distance, powdering scraper send the metallurgical raw material powder of a slicing layer thickness on manufactured current layer upper berth again；
S508, the data that the 3D printing equipment calls in next layer of profile carry out selective laser fusing forming；
S509, the 3D printing equipment judge whether that completing the shell prints, if otherwise return to step S507, if it is
Terminate printing.
8. 3D printing increasing material manufacturing method as described in claim 1, which is characterized in that the step S7 the specific steps are：
S701 takes out with the shell from the molding room, the residual metallic powder in vibratory cleaning shell together with substrate；
S702 detaches the shell from substrate, and removes support；
S703 carries out stress relief annealing process to the shell of removal support；
S704 carries out product inspection to the shell post-processed.
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| CN109482881A (en) * | 2019-01-07 | 2019-03-19 | 常州泰格尔电子材料科技有限公司 | A kind of selective laser sintering preparation SiC/Al composite material structural member method |
| CN110170653A (en) * | 2019-05-29 | 2019-08-27 | 西安工业大学 | One kind is from feeding SiCp/AlSi composite material and preparation method |
| CN110228197A (en) * | 2019-07-22 | 2019-09-13 | 山东创瑞激光科技有限公司 | The method of 3D printing |
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| CN114525434A (en) * | 2022-04-22 | 2022-05-24 | 西安欧中材料科技有限公司 | SiC-induced multiphase reinforced aluminum matrix composite material and preparation method thereof |
| CN114918415A (en) * | 2022-06-02 | 2022-08-19 | 上海天阳钢管有限公司 | Method for manufacturing metal porous layer through 3D printing |
| CN115637346A (en) * | 2022-10-21 | 2023-01-24 | 中国科学院上海硅酸盐研究所 | Al/SiC composite material and preparation method thereof |
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| CN108907190A (en) * | 2018-07-25 | 2018-11-30 | 沈阳精合数控科技开发有限公司 | A kind of 3D printing increasing material manufacturing method of bowl-type thin-walled parts |
| CN108907190B (en) * | 2018-07-25 | 2020-07-31 | 沈阳精合数控科技开发有限公司 | 3D printing additive manufacturing method for bowl-shaped thin-wall part |
| CN109482881A (en) * | 2019-01-07 | 2019-03-19 | 常州泰格尔电子材料科技有限公司 | A kind of selective laser sintering preparation SiC/Al composite material structural member method |
| CN110170653A (en) * | 2019-05-29 | 2019-08-27 | 西安工业大学 | One kind is from feeding SiCp/AlSi composite material and preparation method |
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| CN110405206A (en) * | 2019-07-23 | 2019-11-05 | 同济大学 | A method of aluminium alloy monomer structure is prepared using 3D printing |
| CN114525434A (en) * | 2022-04-22 | 2022-05-24 | 西安欧中材料科技有限公司 | SiC-induced multiphase reinforced aluminum matrix composite material and preparation method thereof |
| CN114918415A (en) * | 2022-06-02 | 2022-08-19 | 上海天阳钢管有限公司 | Method for manufacturing metal porous layer through 3D printing |
| CN115637346A (en) * | 2022-10-21 | 2023-01-24 | 中国科学院上海硅酸盐研究所 | Al/SiC composite material and preparation method thereof |
| CN115637346B (en) * | 2022-10-21 | 2023-11-10 | 中国科学院上海硅酸盐研究所 | Al/SiC composite material and preparation method thereof |
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