CN105562691A - 3D printing preparation method for injection mold - Google Patents
3D printing preparation method for injection mold Download PDFInfo
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- CN105562691A CN105562691A CN201510980138.7A CN201510980138A CN105562691A CN 105562691 A CN105562691 A CN 105562691A CN 201510980138 A CN201510980138 A CN 201510980138A CN 105562691 A CN105562691 A CN 105562691A
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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
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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
- 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
- B22F12/40—Radiation means
- B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
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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
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
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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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/364—Process control of energy beam parameters for post-heating, e.g. remelting
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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
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
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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
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/64—Treatment of workpieces or articles after build-up by thermal means
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/007—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of moulds
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- 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 3D printing preparation method for an injection mold. The 3D printing preparation method comprises the following steps that 1, mixed powder is prepared, and then vacuum induction melting is carried out, wherein the mixed powder is prepared from, by weight percent, 0.4% to 0.5% of C, 0.7% to 0.75% of Si, 0.35% to 0.45% of Mn, 14% to 15.6% of Cr, 0.25% to 0.35% of V and the balance Fe; 2, an atomization powder preparing method is adopted for preparing the powder; 3, a three-dimensional model is established; 4, the injection mold is formed; and 5, the formed injection mold is separated from a substrate, and then the injection mold is placed in a muffle furnace for annealing to improve the plasticity and toughness of the injection mold. According to the 3D printing preparation method, cracking of mold steel in the 3D printing process can be effectively restrained. Meanwhile, C is added to make up ingredient changes caused by element evaporation and carbonization of the injection mold under the action of lasers.
Description
Technical field
The invention belongs to mould steel and increase material preparing technical field, more specifically, relate to a kind of 3D printing preparation method of injection mold.
Background technology
Mould is widely used, the product members formed machining in modern manufacturing industry, nearly all needs to use mould.So Die Industry is the important component part of national new high-tech industry, it is important, valuable technical resource.Wherein, injection mold is as the important process equipment producing various industrial products, and it is a kind of technique being copied moulded plastic products by given shape, and the production in enormous quantities of molded plastic article is become a reality.Therefore, the design level of injection mold, the performance of the height of technology content to plastic products have great significance.
Along with developing rapidly of plastics industry, and plastic products applying at industrial departments such as Aeronautics and Astronautics, electronics, machinery, boats and ships and automobiles, product to the performance of mould and structural requirement also more and more higher.Such as the conformal cooling channel structure of injection mold, cooling water channel is tightly invested mold cavity surface by this channel system, changes, greatly promote cooling effectiveness and the cooling uniformity of mould with die profile change.But the technology such as traditional machined, electric spark cannot complete the manufacture of complicated conformal cooling channel, need badly and seek a kind of new processing method.
3D printing technique is a kind of advanced manufacturing technology occurred late 1980s, and the STRUCTURE DECOMPOSITION of complexity, based on the manufacturing theory successively superposing material, is two dimension manufacture by this technology, can produce structure complicated arbitrarily fast.The nineties in 20th century, 3D printing technique started the quick manufacture being applied to mould, mainly indirect fabrication mould, and as turned over mould mfg. moulding die by silica gel soft mode, the mould of indirect fabrication is in performance, service life all exists limitation.Along with the development of 3D printing technique, laser 3D printing technique use high energy laser beam fusing refining metallic powder, directly produce high-performance complex-shaped close to full compact metal mould.Compared to traditional diamond-making technique, this technology can shorten mold production process flow process, accelerates research and development and manufacture process.
At present, use laser 3D printing technique directly to manufacture injection mold and begin one's study, but forming technology, forming efficiency and stability etc. still can not meet Production requirement.The metallurgical imperfection such as mould steel cracking, low-melting alloy elements vaporization that particularly larger in laser forming process thermal stress gradient causes, seriously constrains the application of 3D printing technique in injection mold field.
In addition, 3D printing technique is because adopting laser selective fusing, sintering metal powder, so have particular/special requirement to the mobility of metal dust, oxygen content and domain size distribution, therefore, adopt the injection mold of the 3D printing technique direct forming existing trade mark still to there is the problem of material and progress aspect, need badly and be optimized at the Composition Design of injection mold, material preparation and process aspect.
Summary of the invention
For above defect or the Improvement requirement of prior art, the invention provides the 3D printing preparation method of injection mold, be intended to the injection mold composition, material and the best forming technology thereof that propose to be suitable for, the object that the injection mold realizing shape and structure complexity manufactures fast.
For achieving the above object, according to the present invention, provide a kind of 3D printing preparation method of injection mold, it is characterized in that, comprise the following steps:
(1) mixed-powder is configured, subsequently mixed-powder is carried out vacuum induction melting, to form mould steel stock, wherein, the percentage by weight of the composition that comprises of described mixed-powder and each composition is as follows: C element 0.4% ~ 0.5%, Si element 0.7% ~ 0.75%, Mn element 0.35% ~ 0.45%, Cr element 14% ~ 15.6%, V element 0.25% ~ 0.35%, surplus is Fe element;
(2) gas-atomized powder method is adopted to carry out powder process to the mould steel stock that step (1) is formed;
(3) set up injection mold threedimensional model on computers, described threedimensional model is changed into STL form and imports in selective laser melting quickly shaping device;
(4) powder that step (2) is obtained is placed in selective laser melting quickly shaping device, and preheating is carried out to the substrate of selective laser melting quickly shaping device, on substrate, carry out injection mold shaping subsequently;
(5) adopt wire cutting technology to be separated from described substrate by the injection mold of shaping, then injection mold is placed in Muffle furnace anneals, to improve plasticity and the toughness of injection mold.
Preferably, in step (2), the medium that gas-atomized powder method adopts is argon gas.
Preferably, in step (2), gained powder is spherical or class is spherical, and powder diameter is distributed in 15 ~ 45 μm, and oxygen content is lower than 800ppm.
Preferably, in step (4), in injection mold forming process, adopt laser remolten scanning strategy, and substrate temperature is at 50 ~ 150 DEG C DEG C, to reduce the thermograde in forming process, reduces the residual stress in injection mold; Wherein, laser remolten scanning strategy refers to after completing first time scanning shaping, second time is for border, the molten bath run-down again of dispersion-strengtherning phase enrichment, then under the effect of laser heat, the dispersion-strengtherning on border, molten bath accompanies the alloy flow of remelting in molten bath, thus the gathering decreased on border, molten bath, be uniformly distributed to realize the disperse of dispersion-strengtherning in mould steel matrix; On the other hand, particle refuse under the effect of second time scanning of first time scanning rear section nodularization, thus the nodularization degree of injection mold can be reduced.
Preferably, in step (4), the lasing light emitter that selective laser melting quickly shaping device adopts is Yb optical-fiber laser, the wavelength of laser is 1070 ± 10nm, shaping power is 200 ~ 300W, spot diameter is 0.1mm, and sweep speed is 500 ~ 800mm/s, and Scan slice thickness is 20 ~ 30 μm.
Preferably, in step (5), annealing temperature is 200 DEG C ~ 350 DEG C, and annealing time is 2 ~ 5 hours.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following beneficial effect:
(1) the present invention adopts vacuum induction melting to prepare the alloy powder being suitable for injection mold in conjunction with aerosolization method, and trace increases mould steel alloy solid solution intensified element Cr targetedly, trace reduces alloy free state element M n and Si, thus effectively suppresses the cracking in mould steel 3D print procedure.Increase C element, to make up its elements vaporization carbonization under laser action and the composition transfer caused simultaneously;
(2) adopt laser remolten scanning strategy in conjunction with basal plate preheating in forming process of the present invention, can effectively alleviate injection mold internal residual stress, thus suppress the generation of crackle, improve product forming quality;
(3) the present invention can the parts of Quick-forming planform complexity, have and manufacture fast, accurately, shorten the manufacturing cycle, the feature reduced costs.
(4) injection mold prepared of the present invention, compared with Sweden S136 injection mold, improves the C element of 0.05%wt ~ 0.15%wt, to make up the loss of its carbonization under high energy laser effect.Improve solid solution in the alloy of 0.5% ~ 2%wt and strengthen element Cr, reduce free state element M n and Si element in alloy simultaneously, reducing amount is respectively 0.05% ~ 0.15%wt and 0.05% ~ 0.10%wt, thus effectively reduces the cracking situation of injection mold in 3D print procedure; Compared with U.S. P20 injection mold, significantly have submitted Cr content, be of value to the corrosion resistance improving injection mold; Compared with Chinese 4Cr13 injection mold, reduce the content of Mn and Si element, improve the content of C and Cr element, will effectively suppress the cracking of mould steel under laser action and the loss of C element.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
With reference to Fig. 1, general thought of the present invention is: carry out vacuum induction melting after preparation mixing mixing, carry out gas-atomized powder subsequently to the alloy of melting; By threedimensional model with STL formatted output, import in selective laser melting quickly shaping device, and aerosolization legal system is obtained in the powder bed of powder loading selective laser melting quickly shaping device.Laser beam obtains the metal structure of two dimension according to the powder in the melting range of the data selection of slicing layer, piles up finally can obtain the three-dimensional injection mold consistent with cad model through layer by layer.Adopt the subsequent treatment process such as Linear cut separation, heat treatment can obtain the injection mold of labyrinth of good performance afterwards.
Embodiment 1
(1) mixed-powder is configured, subsequently mixed-powder is carried out vacuum induction melting, to form mould steel stock, wherein, the percentage by weight of the composition that comprises of described mixed-powder and each composition is as follows: C element 0.4%, Si element 0.75%, Mn element 0.45%, Cr element 14%, V element 0.3%, surplus is Fe element;
(2) adopt argon gas atomization gas-atomized powder is carried out to the alloy after above-mentioned melting, gained powder is spherical or class is spherical, domain size distribution at 15 ~ 30 μm, oxygen content lower than 800ppm, to obtain the powder of good fluidity;
(3) set up parts three-dimensional CAD model on computers, described threedimensional model is changed into STL form and imports in selective laser melting quickly shaping device;
(4) powder that aerosolization is obtained is filled in selective laser melting quickly shaping device, and carries out injection mold shaping on substrate.Forming parameter is: lasing light emitter is Yb optical-fiber laser, and the wavelength of laser is 1070 ± 10nm, laser power 200W, and sweep speed is 500mm/s, and thickness is 20 μm, and laser remolten scanning strategy is aided with substrate temperature 50 DEG C; Under argon shield, according to cad model, three-dimensional is carried out to injection mold powder, after product cooling, remove floating powder on surface, obtain the injection mold of shape consistent with cad model;
(5) adopt wire cutting technology to be separated from described substrate by the injection mold of shaping, then injection mold is placed in Muffle furnace and carries out 200 DEG C, anneal 5 hours, remove injection mold internal stress to strengthen plasticity and the toughness of injection mold.
Embodiment 2
(1) mixed-powder is configured, subsequently mixed-powder is carried out vacuum induction melting, to form mould steel stock, wherein, the percentage by weight of the composition that comprises of described mixed-powder and each composition is as follows: C element 0.45%, Si element 0.725%, Mn element 0.4%, Cr element 14.8%, V element 0.25%, surplus is Fe element;
(2) adopt argon gas atomization gas-atomized powder is carried out to the alloy after above-mentioned melting, gained powder is spherical or class is spherical, domain size distribution at 30 ~ 45 μm, oxygen content lower than 800ppm, to obtain the powder of good fluidity;
(3) set up parts three-dimensional CAD model on computers, described threedimensional model is changed into STL form and imports in selective laser melting quickly shaping device;
(4) powder that aerosolization is obtained is filled in selective laser melting quickly shaping device, and carries out injection mold shaping on substrate.Forming parameter is: lasing light emitter is Yb optical-fiber laser, and the wavelength of laser is 1070 ± 10nm, laser power 250W, and sweep speed is 650mm/s, and thickness is 25 μm, and laser remolten scanning strategy is aided with substrate temperature 100 DEG C; Under argon shield, according to cad model, three-dimensional is carried out to injection mold powder, after product cooling, remove floating powder on surface, obtain the injection mold of shape consistent with cad model;
(5) adopt wire cutting technology to be separated from described substrate by the injection mold of shaping, then injection mold is placed in Muffle furnace and carries out 275 DEG C, anneal 3.5 hours, remove injection mold internal stress to strengthen plasticity and the toughness of injection mold.
Embodiment 3
(1) mixed-powder is configured, subsequently mixed-powder is carried out vacuum induction melting, to form mould steel stock, wherein, the percentage by weight of the composition that comprises of described mixed-powder and each composition is as follows: C element 0.5%, Si element 0.70%, Mn element 0.35%, Cr element 15.6%, V element 0.35%, surplus is Fe element;
(2) adopt argon gas atomization gas-atomized powder is carried out to the alloy after above-mentioned melting, gained powder is spherical or class is spherical, domain size distribution at 20 ~ 40 μm, oxygen content lower than 800ppm, to obtain the powder of good fluidity;
(3) set up parts three-dimensional CAD model on computers, described threedimensional model is changed into STL form and imports in selective laser melting quickly shaping device;
(4) powder that aerosolization is obtained is filled in selective laser melting quickly shaping device, and carries out injection mold shaping on substrate.Forming parameter is: lasing light emitter is Yb optical-fiber laser, and the wavelength of laser is 1070 ± 10nm, laser power 300W, and sweep speed is 800mm/s, and thickness is 30 μm, and laser remolten scanning strategy is aided with substrate temperature 150 DEG C; Under argon shield, according to cad model, three-dimensional is carried out to injection mold powder, after product cooling, remove floating powder on surface, obtain the injection mold of shape consistent with cad model;
(5) adopt wire cutting technology to be separated from described substrate by the injection mold of shaping, then injection mold is placed in Muffle furnace and carries out 350 DEG C, anneal 2 hours, remove injection mold internal stress to strengthen plasticity and the toughness of injection mold.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a 3D printing preparation method for injection mold, is characterized in that, comprise the following steps:
(1) mixed-powder is configured, subsequently mixed-powder is carried out vacuum induction melting, to form mould steel stock, wherein, the percentage by weight of the composition that comprises of described mixed-powder and each composition is as follows: C element 0.4% ~ 0.5%, Si element 0.7% ~ 0.75%, Mn element 0.35% ~ 0.45%, Cr element 14% ~ 15.6%, V element 0.25% ~ 0.35%, surplus is Fe element;
(2) gas-atomized powder method is adopted to carry out powder process to the mould steel stock that step (1) is formed;
(3) set up injection mold threedimensional model on computers, described threedimensional model is changed into STL form and imports in selective laser melting quickly shaping device;
(4) powder that step (2) is obtained is placed in selective laser melting quickly shaping device, and preheating is carried out to the substrate of selective laser melting quickly shaping device, on substrate, carry out injection mold shaping subsequently;
(5) adopt wire cutting technology to be separated from described substrate by the injection mold of shaping, then injection mold is placed in Muffle furnace anneals, to improve plasticity and the toughness of injection mold.
2. the 3D printing preparation method of a kind of injection mold according to claim 1, is characterized in that, in step (2), the medium that gas-atomized powder method adopts is argon gas.
3. the 3D printing preparation method of a kind of injection mold according to claim 1, is characterized in that, in step (2), gained powder is spherical or class is spherical, and powder diameter is distributed in 15 ~ 45 μm, and oxygen content is lower than 800ppm.
4. the 3D printing preparation method of a kind of injection mold according to claim 1, it is characterized in that, in step (4), laser remolten scanning strategy is adopted in injection mold forming process, and substrate temperature is at 50 ~ 150 DEG C, to reduce the thermograde in forming process, reduce the residual stress in injection mold; Wherein, laser remolten scanning strategy refers to after completing first time scanning shaping, second time is for border, the molten bath run-down again of dispersion-strengtherning phase enrichment, then under the effect of laser heat, the dispersion-strengtherning on border, molten bath accompanies the alloy flow of remelting in molten bath, thus the gathering decreased on border, molten bath, be uniformly distributed to realize the disperse of dispersion-strengtherning in mould steel matrix; On the other hand, particle refuse under the effect of second time scanning of first time scanning rear section nodularization, thus the nodularization degree of injection mold can be reduced.
5. the 3D printing preparation method of a kind of injection mold according to claim 1, it is characterized in that, in step (4), the lasing light emitter that selective laser melting quickly shaping device adopts is Yb optical-fiber laser, the wavelength of laser is 1070 ± 10nm, and shaping power is 200 ~ 300W, and spot diameter is 0.1mm, sweep speed is 500 ~ 800mm/s, and Scan slice thickness is 20 ~ 30 μm.
6. the 3D printing preparation method of a kind of injection mold according to claim 1, is characterized in that, in step (5), annealing temperature is 200 DEG C ~ 350 DEG C, and annealing time is 2 ~ 5 hours.
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Cited By (16)
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| CN106735211A (en) * | 2016-12-15 | 2017-05-31 | 武汉工程大学 | The manufacturing process and device of a kind of FGM |
| CN106825566A (en) * | 2017-01-11 | 2017-06-13 | 华南理工大学 | A kind of method that selective laser is melted and molded martensite ag(e)ing steel mold |
| CN106881509A (en) * | 2017-03-20 | 2017-06-23 | 南昌大学 | A kind of 3D printing method for increasing material and spark-erosion sinking based on ultra-sonic welded |
| CN108179295A (en) * | 2017-12-28 | 2018-06-19 | 华中科技大学 | A kind of method for fast mfg of enhanced conformal cooling mold copper |
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| CN108941534A (en) * | 2018-08-02 | 2018-12-07 | 中国地质大学（武汉） | A kind of graphene strengthens 3D printing mold powdered steel and preparation method thereof, application |
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| CN109609862A (en) * | 2019-01-02 | 2019-04-12 | 江西安而泰合金科技有限公司 | A kind of stainless steel material suitable for preparing ventilative steel |
| CN109986724A (en) * | 2019-05-07 | 2019-07-09 | 重庆大学 | Increasing material manufacturing mold with type cooling water channel structure-function combining design technology method |
| CN111036905A (en) * | 2019-12-18 | 2020-04-21 | 同济大学 | Method for improving density and avoiding hole defects by using layer-by-layer repeated laser remelting |
| CN111844629A (en) * | 2019-04-29 | 2020-10-30 | 浙江万豪模塑股份有限公司 | Injection mold for automobile lens and 3D printing method |
| CN114905732A (en) * | 2022-05-23 | 2022-08-16 | 胡新香 | 3D printing anti-grafting forming manufacturing method of injection mold |
| CN115961219A (en) * | 2021-10-12 | 2023-04-14 | 宁波匠心快速成型技术有限公司 | Stainless steel material for 3D printing, and preparation method and application thereof |
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Inventor after: Wei Qingsong Inventor after: Chen Zhiping Inventor after: Zhou Yan Inventor after: Shi Yusheng Inventor after: Wen Shifeng Inventor after: Teng Qing Inventor after: Tian Le Inventor after: Li Wei Inventor after: Zhao Xiao Inventor after: Ye Fuyuan Inventor before: Wei Qingsong Inventor before: Zhou Yan Inventor before: Shi Yusheng Inventor before: Wen Shifeng Inventor before: Teng Qing Inventor before: Tian Le Inventor before: Li Wei Inventor before: Zhao Xiao |
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