CN107876762A - A kind of laser metal 3D printing method for realizing Ni-based function part local solidification tissue customization - Google Patents

A kind of laser metal 3D printing method for realizing Ni-based function part local solidification tissue customization Download PDF

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CN107876762A
CN107876762A CN201711073924.4A CN201711073924A CN107876762A CN 107876762 A CN107876762 A CN 107876762A CN 201711073924 A CN201711073924 A CN 201711073924A CN 107876762 A CN107876762 A CN 107876762A
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printing
technological parameter
function part
customization
solidified structure
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CN107876762B (en
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宋立军
肖辉
李思萌
罗国云
成满平
李言覃
肖文甲
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Hunan 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
    • 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
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • B22F10/368—Temperature or temperature gradient, e.g. temperature of the melt pool
    • 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
    • B22F10/80—Data acquisition or data processing
    • 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
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • 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]
    • 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 laser metal 3D printing method for realizing Ni-based function part local solidification tissue customization.First draw out the corresponding relation figure of nickel-base alloy solidified structure and Solidification Parameters；Solidification Parameters scope according to corresponding to graph of a relation obtains parts locally destination organization；Temperature field of molten pool is calculated using three-dimensional finite element heat transfer model, reproduces above-mentioned Solidification Parameters scope, and then obtain the technological parameter matched with destination organization；Part all sites solidified structure and processing parameter matching are completed by said process；Monolayer slices processing is carried out to part, obtains technological parameter of the individual layer with change in location, until the section for completing all layers of part is set with technological parameter；Set input 3D printing system to carry out 3D printing the technological parameter of customization, obtain with the Ni-based function part for customizing solidified structure.The present invention is by according to parts locally organizational requirements, using the technological parameter of customization, can effectively realize the customization of parts locally solidified structure.

Description

A kind of laser metal 3D printing for realizing Ni-based function part local solidification tissue customization Method
Technical field
The present invention relates to laser metal material processing field, more particularly to one kind to realize Ni-based function part local solidification group Knit the laser metal 3D printing method of customization.
Background technology
The generally existing gradient function structure in industrial quarters and nature, its composition are realized with configuration with spatial position change Its specific function, to adapt to various military services or living environment.At present, gradient function structure mainly has two kinds, i.e., more material gradients Functional part and homogeneity gradient function part.More material gradient functional parts are to utilize the different material of two kinds of (or a variety of) performances Material, by continuously changing the Nomenclature Composition and Structure of Complexes of material, makes interface disappear, and then cause the performance of material with the change of locus And change, such as using Ni-based dual alloy, titanium-based dual alloy and steel-more alloys of titanium-nickel, to realize aircraft engine integral turbine leaf The high fracture strength of disk core and the high high temperature creep strength of Low Cycle Fatigue Strength and disk edge and blade；Another kind is using of the same race The performance difference that the different tissues form of material has, by realizing its gradient performance to the space layout of solidified structure, such as exist Aerospace field, crystal boundary is the source for producing high-temerature creep fracture under hot environment, and solidified structure is regulated to highly oriented post After shape brilliant (being arranged parallel to principal direction of stress) or even monocrystalline, the high-temperature behavior of turbo blade can be effectively improved and extend its clothes The life-span is used as a servant, and during room-temperature applications, tissue modulation can be effectively improved to the room temperature strength of material for the equiaxed grain structure of random orientation And plasticity.
Laser metal 3D printing has the characteristics that thermal source high concentration, the small and heat affected area of dilution are small, and its unique advantage exists In it with the potentiality for being combined excellent material property with accurate manufacturing process, it is extremely suitable for making space structure and answer Miscellaneous, structural constituent space layout function part.
At present, domestic and international research institution has carried out extensive laser metal 3D printing to dissimilar metal FGM and ground Study carefully.Beijing Institute of Aeronautics using Laser Melting Deposition mode manufactured serial titanium alloy high-strength/low strong (TA15/TA2), in strong/high-strength (TC4/ TC11, TA15/TC11), high-strength/high damage tolerance (TC18/TC 21) gradient-structure, and devise serial transition region Novel Titanium Alloy material.Northwestern Polytechnical University have studied Ti/Rene88DT gradient components.It is double that Beijing non-ferrous metal institute realizes titanium-based Alloy TC11/ γ-TiAl, TC11/Ti2AlNb, TA15/Ti2AlNb, Ni-based dual alloy GH163/Rene95, stainless steel pairing Golden SS316L/Stellite31 and more alloy SS316L/ is Ni-based/Ti6Al4V functionally gradient material (FGM)s.Xi'an Communications University have studied The manufacture of Ti6Al4V/CoCrMo functionally gradient material (FGM)s and Cu/W FGMs.Lancaster University of Britain has manufactured SS316L/ The gradient thin-wall parts of Inconel 718.Lyons, France university realizes Fe/Fe-Al functionally gradient material (FGM).India's science and engineering realizes Stellite-21/ austenitic stainless steel bi-material layers light wall pipe parts.Polish military technology university realizes Fe-Al/SS316L stainless steels The preparation of ring.Univ Michigan-Ann Arbor USA realizes the manufacture of Ni/Cr bi-material layers negative temperature coefficient building blocks of functions.However, due to not Foreign material in proportion undergoes in-situ metallurgical process and alloying action, foreign material gradient function under the high temperature action of molten bath The laser metal 3D printing of structure still faces problems, as the hot physical difference of foreign material causes laser metal 3D printing zero Ftractureed inside part caused by complicated thermal stress, dissimilar material joining interface or transition region produce brittle harmful phase, xenogenesis material Expect collaboration heat treatment optimization of function gradient structure etc..Above-mentioned challenge seriously constrains laser metal 3D printing in more material functions Application in functionally gradient material (FGM) preparation.
The performance of material depends on the composition and microscopic structure of material.The material that composition is identical, tissue is different has complete Different performances.By taking Ti60 as an example, equiax crystal is 1.359% in 600 DEG C/160MPa creep compliances, and column crystal is 0.1633%, Equiax crystal creep rupture life is 48h under 600 DEG C/310MPa situations, and column crystal creep rupture life is 354h.For another example, Ni-based entirety The core service temperature relative vane of turbine blade is relatively low, by core Organization layout be tiny equiax crystal after can improve fracture strength And Low Cycle Fatigue Strength, and the tissue modulation of blade is the column crystal parallel to principal direction of stress arrangement even after monocrystalline, can be with Effectively improve high temperature creep strength.And for example soft inside despite one's hard shell gear, the extremely hard flank of tooth are used to resist face impact stress, compared with Soft gear core is used for the vibration for alleviating gear.In fact, also generally existing is this real using same material in nature The structure of existing gradient function.Radial section such as culm in plant mutually realized with fiber reinforcement by spacing gradient base material it is flexible, Intensity, hardness and stress elimination etc. are according to radial and axial different directionality operations.Such as bone, distribution and the high density of bone surface Compact bone substance has very strong anti-pressure anti-torsion song, is distributed in the low-density cancellous bone storage marrow of inside.These natural structures are all It is the product of long-term evolution.
At present, the research about the regulation and control of metal 3D printing solidified structure is relatively fewer.Existing report is mainly by adjusting work Grain size, pattern and analysis are realized in skill parameter and additional temperature field to change bath temperature gradient, setting rate and cooldown rate Go out the control of phase；Or by path planning strategy, change grain growth texture, to realize anisotropic properties.Such as Popovich et al. carries out laser metal 3D printing using with the technological parameter of change in location, by the solidification for obtaining graded Organize to realize the graded of microhardness and tensile property.The studies above is closed for technique-tissue-performance of metal 3D printing System etc. provides good opinion and theoretical foundation, also provides good method and thinking for structure property regulation and control.But due to Physical process during laser metal 3D printing is extremely complex, affecting parameters are numerous, it is desirable to solidified structure and performance completely by Control, which remains, is greatly challenging.At present, still lack effective method and accuracy controlling or customization are carried out to parts locally solidified structure.
The content of the invention
The purpose of the present invention is to propose to a kind of easy to operate, effective laser metal 3D printing method, this method can be realized Ni-based function part local solidification tissue customization.The present invention is achieved by the steps of：
Step 1：CET model formations are changed to equiaxed dendrite according to Laser Processing nickel-base alloy column
A, n, N in formula0AndFor nickel-base alloy relevant parameter, 1.25 × 10 are taken respectively6、3.4、2×1015And 0.66%, with Thermograde G is ordinate, freezing rate R is that abscissa draws out the critical curve that nickel-base alloy CET changes, wherein ordinate G scope is 103-108K/m, abscissa R scope are 10-4-102G-R two-dimensional coordinate systems are divided into two by m/s, the curve Region, wherein critical curve upper left side are columnar dendrite region, and critical curve lower right is equiaxed dendrite region；
Step 2：Using cooldown rate G*R as definite value, from G*R=10-1Rise, G*R values often rise two magnitudes, in step 1 A curve is drawn out in the G-R two-dimensional coordinate systems of acquisition, further according to λ1=80* (G*R)-0.33, wherein λ1For an interdendritic Away from or equiaxed dendrite diameter, unit μm, corresponding λ is marked on curve1Value, and then obtain same in G-R two-dimensional coordinate systems When include dendrite morphology and the solidified structure of dendrite size information selection figure；
Step 3：Destination organization pattern and size according to needed for parts locally, the solidification group obtained from step 2 Knit and thermograde G and freezing rate R scopes corresponding to destination organization are obtained in selection figure；
Step 4：One group of 3D printing technological parameter is inputted into three-dimensional finite element heat transfer model to count temperature field of molten pool Calculate, extract laser and open 1 second successor thermograde G on the moving boundary of molten bath in a flash1And freezing rate R1Value, with step Three G, R scopes obtained are compared, if G1And R1G, R scope are in, obtains corresponding 3D printing technological parameter；If G1And R1G, R scope are not at, the input of 3D printing technological parameter is adjusted repeatedly, until G1And R1G, R scope are in, acquisition meets bar The technological parameter of part；
Step 5：Repeat step three and step 4, until completing Ni-based function part all sites solidified structure and technique The matching of parameter；
Step 6：Monolayer slices processing is carried out to Ni-based function part using Cura Slice Softwares, obtains individual layer with position The 3D printing technological parameter and scanning pattern of change；
Step 7：Section of the repeat step six until completing Ni-based all layers of function part is set with technological parameter；
Step 8：Set input laser metal 3D printing system to carry out 3D printing the technological parameter of customization, had There is the Ni-based function part of local customization solidified structure.
It is described that the progress monolayer slices processing of Ni-based functional part is comprised the following steps in step 5：
1) according to the change of solidified structure in individual layer, it is mapped to the change of Solidification Parameters；
2) laser parameter and scanning pattern according to the change adjusting process parameter generation of Solidification Parameters with change in location.
In step 7, the section of described Ni-based all layers of the function part of completion is set with technique to be referred to obtain part With the laser technical parameterses and scanning pattern of locus graded.
In step 8, described laser metal 3D printing system, including powder feeding formula laser metal 3D printing system and powder Last bed laser metal 3D printing system；Described technological parameter include laser waveform, spot diameter, peak power, sweep speed, Powder sending quantity, repetition rate, overlapping rate and dutycycle.Due to by calculating, having obtained dendrite morphology and dendrite size information Solidified structure selection figure, the present invention, can be effectively real using the technological parameter of customization by according to parts locally organizational requirements The customization of existing parts locally solidified structure, realizes and carries out accuracy controlling to parts locally solidified structure.
Brief description of the drawings
Fig. 1 is the 3D printing sample solidification group for switching to obtain by successively technological parameter in short transverse with this patent method Knit figure；
Fig. 2 designs the 3D printing sample solidified structure for becoming technological parameter and being obtained to be directed to same layer with this patent method Figure.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
The present invention specifically includes following steps：
Step 1：CET model formations are changed to equiaxed dendrite according to Laser Processing nickel-base alloy column
A, n, N in formula0AndFor nickel-base alloy relevant parameter, 1.25 × 10 are taken respectively6、3.4、2×1015And 0.66%, with Thermograde G is ordinate, freezing rate R is that abscissa draws out the critical curve that nickel-base alloy CET changes, wherein ordinate G scope is 103-108K/m, abscissa R scope are 10-4-102G-R two-dimensional coordinate systems are divided into two by m/s, the curve Region, wherein critical curve upper left side are columnar dendrite region, and critical curve lower right is equiaxed dendrite region.
Step 2：Using cooldown rate G*R as definite value, from G*R=10-1Rise, G*R values often rise two magnitudes, in step 1 A curve is drawn out in the G-R two-dimensional coordinate systems of acquisition, further according to λ1=80* (G*R)-0.33, wherein λ1For an interdendritic Away from or equiaxed dendrite diameter, unit μm, corresponding λ is marked on curve1Value, and then obtain same in G-R two-dimensional coordinate systems When include dendrite morphology and the solidified structure of dendrite size information selection figure.
Step 3：Destination organization pattern and size according to needed for parts locally, the solidification group obtained from step 2 Knit and thermograde G and freezing rate R scopes corresponding to destination organization are obtained in selection figure.
Step 4：One group of 3D printing technological parameter is inputted into three-dimensional finite element heat transfer model to count temperature field of molten pool Calculate, extract laser and open 1 second successor thermograde G on the moving boundary of molten bath in a flash1And freezing rate R1Value, with step Three G, R scopes obtained are compared, if G1And R1G, R scope are in, obtains corresponding 3D printing technological parameter；If G1And R1G, R scope are not at, the input of 3D printing technological parameter is adjusted repeatedly, until G1And R1G, R scope are in, acquisition meets bar The technological parameter of part；
Step 5：Repeat step three and step 4, until completing Ni-based function part all sites solidified structure and technique The matching of parameter；
Step 6：Monolayer slices processing is carried out to Ni-based function part using Cura Slice Softwares, obtains individual layer with position The 3D printing technological parameter and scanning pattern of change；
Step 7：Section of the repeat step six until completing Ni-based all layers of function part is set with technological parameter；
Step 8：Set input laser metal 3D printing system to carry out 3D printing the technological parameter of customization, had There is the Ni-based function part of local customization solidified structure.
Fig. 1 for using the method that this patent proposes in the case where successively switching process conditions the 3D printing sample solidification group that is obtained Knit figure.Sample has successively manufacturing feature, and interlamellar spacing is more uniform, and average layer is spaced about 0.6mm (shown in such as Fig. 1 (a)).Explanation Under the process conditions successively switched, it still is able to control effectively to the floor height of sample.In addition, adjacent layer has different solidifications Tissue topography, odd-level are made up of columnar dendrite, and even level is mainly made up of equiaxed dendrite/born of the same parents' crystalline substance, illustrate that the technique can Effectively change Solidification Microstructure Morphology.Fig. 1 (b) and (c) are respectively even level and odd-level typical case's arborescent structure pattern.Fig. 1 (b) is main To be made up of equiaxed dendrite/born of the same parents' crystalline substance of ordered arrangement, and Fig. 1 (c) is made up of the columnar dendrite of high-sequential.Fig. 1 (c) and (e) The respectively high power SEM patterns of respective regions, it can be seen that the arborescent structure of sample is highly uniform, an average interdendritic away from About 4.5 μm, and average equiaxed dendrite diameter is about 3.8 μm.The above results show, can be effectively right using this patent method Accuracy controlling or customization are carried out along the solidified structure of short transverse.
Fig. 2 is become the 3D printing sample that technological parameter obtained for same layer design for the method that is proposed using this patent and coagulated Gu organization chart.Fig. 2 (a) is the overall pattern of sample interface.Macroscopically sample left end has typical banded structure, integral color Relatively deep, tissue is difficult to differentiate, and sample right-hand member color is relatively bright, can distinguish its columnar dendrite form.Fig. 2 (b) and (c) are The low power of sample left end region and high power metallograph, Fig. 2 (d) are that the SEM of sample schemes.There it can be seen that left end tissue is very It is fine and closely woven, mainly it is made up of tiny short cylinder or cellular-like dendrite tissue, there is the brilliant string tissue morphology of born of the same parents, its average spacing is about For 2.9 μm.Fig. 2 (e) and (f) are sample right-hand member low power and high power metallographic structure pattern, and Fig. 2 (g) is SEM patterns.As can be seen that Sample right-hand member is mainly made up of thick columnar dendrite, and a dendritic arm spacing is 12.8 μm, while also has the secondary of prosperity Dendrite, Models For Secondary Dendrite Arm are spaced about 4.3 μm.The above results show, using this patent method can effectively to same layer not Solidified structure with position carries out accuracy controlling or customization.

Claims (4)

  1. A kind of 1. laser metal 3D printing method for realizing Ni-based function part local solidification tissue customization, it is characterised in that including Following steps：
    Step 1：CET model formations are changed to equiaxed dendrite according to Laser Processing nickel-base alloy column：
    A, n, N in formula0AndFor nickel-base alloy relevant parameter, 1.25 × 10 are taken respectively6、3.4、2×1015And 0.66%, with temperature Gradient G is ordinate, freezing rate R is that abscissa draws out the critical curve that nickel-base alloy CET changes, wherein ordinate G's Scope is 103-108K/m, abscissa R scope are 10-4-102G-R two-dimensional coordinate systems are divided into Liang Ge areas by m/s, the curve Domain, wherein critical curve upper left side are columnar dendrite region, and critical curve lower right is equiaxed dendrite region；
    Step 2：Using cooldown rate G*R as definite value, from G*R=10-1Rise, G*R values often rise two magnitudes, are obtained in step 1 G-R two-dimensional coordinate systems in draw out a curve, further according to λ1=80* (G*R)-0.33, wherein λ1For an interdendritic away from or Equiaxed dendrite diameter, unit μm, corresponding λ is marked on curve1Value, and then obtain and wrapped simultaneously in G-R two-dimensional coordinate systems Containing dendrite morphology and the solidified structure of dendrite size information selection figure；
    Step 3：Destination organization pattern and size according to needed for parts locally, the solidified structure choosing obtained from step 2 Select and thermograde G and freezing rate R scopes corresponding to destination organization are obtained in figure；
    Step 4：One group of 3D printing technological parameter is inputted into three-dimensional finite element heat transfer model to calculate temperature field of molten pool, carried Take out laser and open 1 second successor thermograde G on the moving boundary of molten bath in a flash1And freezing rate R1Value, obtained with step 3 G, R scope be compared, if G1And R1G, R scope are in, obtains corresponding 3D printing technological parameter；If G1And R1Do not locate In G, R scope, the input of 3D printing technological parameter is adjusted repeatedly, until G1And R1G, R scope are in, obtains the work for the condition that meets Skill parameter；Step 5：Repeat step three and step 4, join until completing Ni-based function part all sites solidified structure with technique Several matchings；
    Step 5：Repeat step three and step 4, until completing Ni-based function part all sites solidified structure and technological parameter Matching；
    Step 6：Monolayer slices processing is carried out to Ni-based function part using Cura Slice Softwares, obtains individual layer with change in location 3D printing technological parameter and scanning pattern；
    Step 7：Section of the repeat step six until completing Ni-based all layers of function part is set with technological parameter；
    Step 8：Input laser metal 3D printing system is set to carry out 3D printing the technological parameter of customization, acquisition has office Portion customizes the Ni-based function part of solidified structure.
  2. A kind of 2. laser metal 3D printing for realizing Ni-based function part local solidification tissue customization according to claim 1 Method, it is characterised in that：It is described that following step is included to the progress monolayer slices processing of Ni-based functional part in step 6 Suddenly：
    1) according to the change of solidified structure in individual layer, it is mapped to the change of Solidification Parameters；
    2) laser parameter and scanning pattern according to the change adjusting process parameter generation of Solidification Parameters with change in location.
  3. A kind of 3. laser metal 3D printing for realizing Ni-based function part local solidification tissue customization according to claim 1 Method, it is characterised in that：In step 7, the section of described Ni-based all layers of the function part of completion is set with technique to be referred to Obtain laser technical parameterses and scanning pattern of the part with locus graded.
  4. A kind of 4. laser metal 3D printing for realizing Ni-based function part local solidification tissue customization according to claim 1 Method, it is characterised in that：In step 8, described laser metal 3D printing system, including powder feeding formula laser metal 3D printing System and powder bed laser metal 3D printing system；Described technological parameter include laser waveform, spot diameter, peak power, Sweep speed, powder sending quantity, repetition rate, overlapping rate and dutycycle.
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CN109228353A (en) * 2018-08-06 2019-01-18 上海大学 A kind of Dynamic Slicing algorithm without support 3D printing method
CN109261964A (en) * 2018-10-30 2019-01-25 首都航天机械有限公司 A kind of titanium alloy structure part and its Laser Melting Deposition manufacturing process
CN110453167A (en) * 2019-09-02 2019-11-15 铜陵学院 A kind of laser melting layer tissue accuracy control method
CN110935877A (en) * 2019-12-25 2020-03-31 佛山科学技术学院 Method for forming Inconel625 alloy dendritic crystal morphology
CN110961630A (en) * 2019-12-25 2020-04-07 佛山科学技术学院 Method for regulating dendritic crystal morphology of Al-Si alloy
CN110976868A (en) * 2019-12-25 2020-04-10 佛山科学技术学院 Method for dendritic crystal morphology of CoCrMo alloy
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CN112317761B (en) * 2020-10-10 2023-01-10 北京隆源自动成型系统有限公司 Intelligent process for forming linear gradient alloy by SLM (Selective laser melting)

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