CN100432025C - Metal/ ceramic laser sintering product post-processing method - Google Patents
Metal/ ceramic laser sintering product post-processing method Download PDFInfo
- Publication number
- CN100432025C CN100432025C CNB2006101252221A CN200610125222A CN100432025C CN 100432025 C CN100432025 C CN 100432025C CN B2006101252221 A CNB2006101252221 A CN B2006101252221A CN 200610125222 A CN200610125222 A CN 200610125222A CN 100432025 C CN100432025 C CN 100432025C
- Authority
- CN
- China
- Prior art keywords
- product
- piece
- metal
- laser sintering
- sintering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a post-treatment method of metal/ceramic laser sintering piece, which comprises the following steps: degreasing the metal/ceramic laser sintering piece; sintering under high temperature; jacketing the piece; placing in the cool isostatic pressing furnace; compressing; immersing the piece in the silica gel solution; attaching a layer of liquid on the surface evenly; heating the piece; forming closed protective film on the piece surface; proceeding subsequent manufacturing on the element; making the geometrical size and shape of element satisfy the need; combining SLS technique and CIP technique to form complex shaped structure and high-property piece.
Description
Technical field
The invention belongs to the Rapid Prototyping technique field, be specially a kind of post-treating method of metal/ceramic laser sintering product.
Background technology
Selective laser sintering (SLS) technology is the very fast a kind of Rapid Prototyping technique of development in recent years, it adopts laser layering sintering solid powder selectively, and the cured layer of thermal sintering is superposeed, generate the product of desired shape, can form metal, various powders materials such as pottery, macromolecular material.The SLS technology has process-cycle weak point, the product of the complicated shape structure that can be shaped, material use efficiency height (can reach 100%), low cost and other advantages.When utilizing SLS technology form metal/ceramic objects, need to add the lower polymeric powder material of fusing point as binding agent, the SLS prototype that obtains is removed binding agent by degreasing and high temperature sintering successively, and makes and set up preliminary connection between the metal/ceramic particle.Behind the high temperature sintering, prototype has had certain mechanical property, but inside also has a lot of holes, and density is lower, and mechanical property can't reach service requirements fully, must improve its mechanical property to the densification of this porous product.
Isostatic cool pressing (CIP) technology is by applying extraneous pressure, make that powder particle is subjected to displacement, distortion or cracked, shorten intergranular distance, enlarge the contact area between powder particle, the degree of enhanced granule room machine engagement has the pressed compact good uniformity, advantages such as pressed compact, the amount of machining of the complicated shape that can be shaped are few, conservation.These advantages that the isostatic cool pressing technology has can be used for metal/ceramic SLS product is carried out aftertreatment, improve the density and the mechanical property of product.
Summary of the invention
The object of the present invention is to provide a kind of post-treating method of metal/ceramic laser sintering product, simple, the low-consumption high-efficiency of this method technological process.
The post-treating method of a kind of metal/ceramic laser sintering product provided by the invention the steps include:
(1) pending metal/ceramic laser sintering product is carried out skimming treatment and high temperature sintering;
(2) product behind the high temperature sintering is enclosed jacket, put into the isostatic cool pressing stove again, carry out pressure treatment; The method of attached jacket is as follows:
Product is immersed in the silicone rubber solution, after one deck liquid is evenly adhered on the product surface, product is carried out heating, drying handle, make liquid form the protective membrane of sealing on the product surface;
(3) part that near-net-shape is obtained carries out following process, and the part geometry size and dimension is met the requirements.
The present invention combines selective laser sintering in the Rapid Prototyping technique (SLS) and isostatic cool pressing (CIP) technology, and this complex method possesses following advantage:
(1) adopt the SLS technology, the product of the complicated shape structure that can be shaped particularly has complicated curved surface and inner foraminous product.
(2) through isostatic cool pressing, product can obtain uniform density.
(3) because of having had certain density and intensity through the SLS of high temperature sintering product, the production efficiency of isostatic cool pressing (CIP) obviously improves, and can improve 50%～90%.
(4) jacket of isostatic cool pressing (HIP) process employing is very simple, has removed the deviation that the design jacket brings from.
(5) technological process is simple, low-consumption high-efficiency.
Description of drawings
Fig. 1 is the process flow sheet of the selective laser-hot isostatic pressing composite manufacturing method of metal/ceramic product of the present invention, and wherein, Fig. 1 (a) is a laser scanning section place powder; Fig. 1 (b) is the product of laser selective thermal sintering; Fig. 1 (c) is the product behind degreasing and high temperature sintering; Fig. 1 (d) is an isostatic cool pressing; Fig. 1 (e) is final product.
Embodiment
Below in conjunction with accompanying drawing and example detailed process of the present invention is done further detailed elaboration:
(1) pending metal/ceramic laser sintering product (being the SLS product) is carried out skimming treatment and high temperature sintering, its objective is the high polymer binder of removing in the product, make simultaneously to set up between the powder particle to connect, improve the density and the intensity of product.
(2) for after the SLS product behind the high temperature sintering encloses jacket, can put into the isostatic cool pressing stove, carry out pressure treatment.The method of design of jacket is as follows: product is immersed in the jacket solution, after one deck liquid is evenly adhered on the product surface, product is carried out heating, drying handle, make liquid form the protective membrane of sealing on the product surface, play jacket when isostatic cool pressing.The fluent material here need have following characteristics: a) certain wettability is arranged with metal/ceramic, can be attached to the product surface, and can solidify to form the protective membrane of sealing through heating, drying; B) protective membrane of Xing Chenging has good elasticity and tear strength, can not break in the isostatic cool pressing process.
Jacket solution adopts silicone rubber solution, wherein silicon rubber is about 1 with the volume of organic solvent ratio: (0.8-1.5), the volume percent of solidifying agent and silicone rubber solution is 1: 100-2: 100, wherein, organic solvent can adopt the ethyl acetate etc. can be with any organic solvent of silicon rubber dissolved, and solidifying agent can be the conventional employed solidifying agent of silicone rubber solution such as room temperature fatty amine curing agent or the high temperature resistant solidifying agent of Resins, epoxy.
(3) part that near-net-shape is obtained carries out following process, as simple machining or surface treatment, the part geometry size and dimension is met the demands fully.
The preparation of metal/ceramic laser sintering product can be adopted prior art, can adopt following treatment step to carry out:
(1) adopts 3D sculpting software to design part C AD three-dimensional model,, the data message of stl file is transported to the SLS rapid forming system then by saving as stl file after the section software processes.
(2) the powder feeding mechanism one deck that tiles on workplatform is about the powder to be processed (particle diameter is about 10-60 μ m) of 0.02-0.2mm thickness.
(3) adopt semiconductor pumped YAG laser apparatus, optical fiber laser or the CO of laser power more than or equal to 50W
2Laser apparatus, laser facula are 10-250 μ m, and sweep span is 0.04-0.2mm, and sweep velocity is 500-3000mm/s, and the powder that is positioned at this layer section is scanned sintering.
(4) repeat above-mentioned steps (2)-(3), until the prototype of making desired shape.
Essence of the present invention is that isostatic cool pressing (CIP) technology is applied to quick shaping field, and metal selective laser sintered (SLS) product is carried out aftertreatment processing, can improve the density and the intensity of product.Simultaneously the jacket simplicity of design is easily gone during isostatic cool pressing, has removed the design deviation that jacket brought from.Therefore, in conjunction with selective laser sintering (SLS) technology and isostatic cool pressing (CIP) technology, the complicated shape structure that can be shaped, high performance part.
Example 1
(1) at first according to the distortion situation of SLM product through occurring behind the hot isostatic pressing, utilize the CAD 3D model before 3D sculpting software (as UG, Pro/E etc.) is designed the part hot isostatic pressing, save as stl file by section after the software processes then, the data message of stl file is transported to the SLM rapid forming system.
(2) the powder feeding mechanism one deck that tiles on workplatform is about the thick powder of stainless steel that adds binding agent of 0.1mm (particle diameter is about 20 μ m), and binding agent is a Resins, epoxy, content about 4%.
(3) adopt semiconductor pumped YAG laser apparatus or the optical fiber laser of laser power more than or equal to 50W, laser spot diameter is about 50 μ m, and sweep velocity is about 2000mm/s, and sweep span is about 0.1mm, scans being positioned at this layer section powder.
(4) repeat above-mentioned steps (2)-(3), until make an integral body, shape meets the SLS product of demand.
(5) the SLS product is transferred to the vacuum degreasing stove, vacuumize, setting the degreasing process route is: at room temperature be warming up to 200 ℃ through 1 hour, 1.5 hour be warming up to 400 ℃, 2.5 hour be warming up to 460 ℃, be warming up to 750 ℃ in 2 hours, be warming up to 950 ℃ in 1 hour, insulation cools to room temperature with the furnace after half an hour, comes out of the stove.
(6) the SLS product is transferred to vacuum sintering furnace, vacuumize, the setting operational path is: be warming up to 1100 ℃ through 1 hour under the room temperature, be incubated 3 hours, be warming up to 1200 ℃ then half an hour, be incubated 2 hours, cool to room temperature is come out of the stove.
(7) the SLS product behind the high temperature sintering is immersed in the silicone rubber solution, make product surface attachment one deck silicon rubber, shift product to stoving oven, 30 ℃～40 ℃ were dried by the fire 7～9 hours down, made silicon rubber form layer protecting film on the product surface.Wherein, the composition of silicone rubber solution is: the volume fraction of room temperature fatty amine curing agent is 1.5%, and the volume ratio of silicon rubber and ethyl acetate is 1: 1.
(8) whether the check protection film seals.If not complete closed, repeating step (7) is until the protective membrane of product surface formation one deck complete closed.
(9) surface has been adhered to the close and protect film product be transferred to the isostatic cool pressing stove, be medium with mixes liquid oil such as kerosene and gasoline, be forced into 2GPa fast, pressurize 5min.Under the effect of pressure, SLS product density and mechanical property improve greatly, and geometrical dimension and shape all meet the requirements substantially.
(10) last, the part that near-net-shape is obtained carries out following process, and the part geometry size and dimension is met the demands fully.
Example 2
(1) at first according to the distortion situation of SLM product through occurring behind the hot isostatic pressing, utilize the CAD 3D model before 3D sculpting software (as UG, Pro/E etc.) is designed the part hot isostatic pressing, save as stl file by section after the software processes then, the data message of stl file is transported to the SLM rapid forming system.
(2) the powder feeding mechanism one deck that tiles on workplatform is about the thick ceramic powder that adds binding agent of 0.1mm (main component is an aluminum oxide, and particle diameter is about 80 μ m), and binding agent is a Resins, epoxy, content about 5%.
(3) adopt semiconductor pumped YAG laser apparatus or the optical fiber laser of laser power more than or equal to 50W, laser facula is about 50 μ m, and sweep velocity is about 2000mm/s, and sweep span is about 0.1mm, scans being positioned at this layer section powder.
(4) repeat above-mentioned steps (2)-(3), until make an integral body, shape meets the SLS product of demand.
(5) the SLS product is transferred to vacuum oven, vacuumize, carry out degreasing and high temperature sintering and handle.Setting the degreasing process route is: at room temperature be warming up to 200 ℃ through 1 hour, be warming up to 450 ℃ in 1 hour, be warming up to 550 ℃ in 1 hour, be warming up to 1400 ℃ in 3 hours, be incubated and cool to room temperature with the furnace after 6 hours, come out of the stove.
(6) the SLS product behind the high temperature sintering is immersed in the silicon sol solution, make product surface attachment one deck silicon sol, shift product to stoving oven, 80 ℃～100 ℃ were dried by the fire 7～9 hours down, made silicon rubber form layer protecting film on the product surface.Wherein, the composition of silicone rubber solution is: the volume fraction of the high temperature resistant solidifying agent of Resins, epoxy is 1.5%, and the volume ratio of silicon rubber and ethyl acetate is 1: 1.
(7) whether the check protection film seals.If not complete closed, repeating step (7) is until the protective membrane of product surface formation one deck complete closed.
(8) surface has been adhered to the close and protect film product be transferred to the isostatic cool pressing stove, be medium with mixes liquid oil such as kerosene and gasoline, be forced into 3GPa fast, pressurize 6min.Under the effect of pressure, SLS product density and mechanical property improve greatly, and geometrical dimension and shape all meet the requirements substantially.
(9) last, the part that near-net-shape is obtained carries out following process, and the part geometry size and dimension is met the demands fully.
Claims (2)
1, a kind of post-treating method of metal/ceramic laser sintering product, its step comprises:
(1) pending metal/ceramic laser sintering product is carried out skimming treatment and high temperature sintering;
(2) product behind the high temperature sintering is enclosed jacket, put into the isostatic cool pressing stove again, carry out pressure treatment; The method of attached jacket is as follows:
Product is immersed in the silicone rubber solution, after one deck liquid is evenly adhered on the product surface, product is carried out heating, drying handle, make liquid form the protective membrane of sealing on the product surface;
(3) part that near-net-shape is obtained carries out following process, and the part geometry size and dimension is met the requirements.
2, post-treating method according to claim 1 is characterized in that: in the silicone rubber solution, wherein silicon rubber is 1 with the volume of organic solvent ratio: 0.8-1 in the step (2): 1.5, and the volume percent of solidifying agent and silicone rubber solution is 1: 100-2: 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101252221A CN100432025C (en) | 2006-12-01 | 2006-12-01 | Metal/ ceramic laser sintering product post-processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101252221A CN100432025C (en) | 2006-12-01 | 2006-12-01 | Metal/ ceramic laser sintering product post-processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1970503A CN1970503A (en) | 2007-05-30 |
| CN100432025C true CN100432025C (en) | 2008-11-12 |
Family
ID=38111554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101252221A Active CN100432025C (en) | 2006-12-01 | 2006-12-01 | Metal/ ceramic laser sintering product post-processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100432025C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328067B (en) * | 2008-07-16 | 2010-10-27 | 河北工业大学 | Manufacturing method and apparatus of anisotropic functional member |
| CN107617859A (en) * | 2016-12-23 | 2018-01-23 | 合肥盛强数控设备有限公司 | A kind of Digit Control Machine Tool aftertreatment technology based on SLS3D print dies |
| CN109530695A (en) * | 2018-12-20 | 2019-03-29 | 西安铂力特增材技术股份有限公司 | A method of for increasing material manufacturing high-performance metal product |
| CN111203535A (en) * | 2020-01-13 | 2020-05-29 | 无锡英特派金属制品有限公司 | Method for preparing iridium crucible by adopting 3D printing technology |
| CN113909490A (en) * | 2021-09-10 | 2022-01-11 | 华中科技大学 | Metal part and near-net forming method thereof |
| CN113880585B (en) * | 2021-10-29 | 2023-10-27 | 武汉科技大学 | Titanium boride-boron carbide composite ceramic with complex shape and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640667A (en) * | 1995-11-27 | 1997-06-17 | Board Of Regents, The University Of Texas System | Laser-directed fabrication of full-density metal articles using hot isostatic processing |
| US5745834A (en) * | 1995-09-19 | 1998-04-28 | Rockwell International Corporation | Free form fabrication of metallic components |
| CN1752238A (en) * | 2005-09-27 | 2006-03-29 | 华中科技大学 | Method for fast mfg. metal/high-molecular composite material parts |
| CN1861296A (en) * | 2006-06-14 | 2006-11-15 | 华中科技大学 | Method for near-purification formation of parts |
-
2006
- 2006-12-01 CN CNB2006101252221A patent/CN100432025C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5745834A (en) * | 1995-09-19 | 1998-04-28 | Rockwell International Corporation | Free form fabrication of metallic components |
| US5640667A (en) * | 1995-11-27 | 1997-06-17 | Board Of Regents, The University Of Texas System | Laser-directed fabrication of full-density metal articles using hot isostatic processing |
| CN1752238A (en) * | 2005-09-27 | 2006-03-29 | 华中科技大学 | Method for fast mfg. metal/high-molecular composite material parts |
| CN1861296A (en) * | 2006-06-14 | 2006-11-15 | 华中科技大学 | Method for near-purification formation of parts |
Non-Patent Citations (10)
| Title |
|---|
| 湿袋法冷等静压成型工艺. 江崇经.电瓷避雷器，第3期（总145期）期. 1995 |
| 湿袋法冷等静压成型工艺. 江崇经.电瓷避雷器，第3期（总145期）期. 1995 * |
| 用于选择性激光烧结功能件的基体聚合物烧结材料的研究. 黎志冲邓.塑料工业，第32卷第4期. 2004 |
| 用于选择性激光烧结功能件的基体聚合物烧结材料的研究. 黎志冲邓.塑料工业，第32卷第4期. 2004 * |
| 选择性激光烧结间接成型金属件及其在机械工业中的应用. 陈森昌等.机械工程材料，第26卷第8期. 2002 |
| 选择性激光烧结间接成型金属件及其在机械工业中的应用. 陈森昌等.机械工程材料，第26卷第8期. 2002 * |
| 金属粉末选择性激光烧结的后处理工艺分析. 邓琦林邓.航空工艺技术，第1期. 1996 |
| 金属粉末选择性激光烧结的后处理工艺分析. 邓琦林邓.航空工艺技术，第1期. 1996 * |
| 陶瓷粉末选择性激光烧结的后处理工艺分析. 邓琦林等.航天工艺，第1期. 1997 |
| 陶瓷粉末选择性激光烧结的后处理工艺分析. 邓琦林等.航天工艺，第1期. 1997 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1970503A (en) | 2007-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100432025C (en) | Metal/ ceramic laser sintering product post-processing method | |
| Dermeik et al. | Laminated object manufacturing of ceramic‐based materials | |
| CN1970504A (en) | Metal/ ceramic laser sintering product hot isostatic pressing processing method | |
| CN1861296A (en) | Method for near-purification formation of parts | |
| KR20100098507A (en) | Open cell, porous material, and a method of, and mixture for, making same | |
| CN100462333C (en) | Method of preparing SiC base multilayer tubular composite ceramic | |
| Meshalkin et al. | Methods used for the compaction and molding of ceramic matrix composites reinforced with carbon nanotubes | |
| CN108675798A (en) | A kind of silicon nitride ceramics and preparation method thereof | |
| CN108002842B (en) | Preparation method of porous silicon nitride part with complex shape | |
| TW200540289A (en) | Cylindrical sputtering target, ceramic sintered body, and process for producing sintered body | |
| CN108602726B (en) | Method for producing ceramic sintered body, and method and apparatus for producing ceramic molded body | |
| CN115286394A (en) | Preparation method of silicon carbide ceramic material for binder jet printing | |
| CN111836711A (en) | Additive manufacturing method and apparatus | |
| CN113105244A (en) | Extrusion molding 3D printing silicon carbide ceramic and preparation method thereof | |
| CN101391896A (en) | Quick-speed manufacturing method of complicated ceramic | |
| CN110449586A (en) | A kind of method that low pressure injection molding prepares metal honeycomb material | |
| KR101761048B1 (en) | Core for precision casting, production method therefor, and mold for precision casting | |
| CN103586468B (en) | TiAl alloy powder near-net-shaping method | |
| EP4301531A1 (en) | Method for manufacturing a near net shape (nns) component of complex shape using pressure-assisted sintering | |
| CN1334759A (en) | Metal-ceramic laminar-band composite | |
| CN104671751A (en) | Method for preparing closed-pore alumina-based ceramic with controllable pore size | |
| JP2005289744A (en) | Method for manufacturing reaction sintered silicon carbide structure | |
| KR101949072B1 (en) | Porous body, porous bonded body, filtration filter for metal melt, firing jig and manufacturing method of porous body | |
| CN103433486A (en) | Die for preparing silicon carbide silicon base plate framework and method for preparing silicon carbide silicon base plate | |
| JP2007056959A (en) | Method for producing friction member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |