CN115106543A - Temperature-controllable sample base station for metal additive manufacturing - Google Patents
Temperature-controllable sample base station for metal additive manufacturing Download PDFInfo
- Publication number
- CN115106543A CN115106543A CN202210773610.XA CN202210773610A CN115106543A CN 115106543 A CN115106543 A CN 115106543A CN 202210773610 A CN202210773610 A CN 202210773610A CN 115106543 A CN115106543 A CN 115106543A
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- Prior art keywords
- base station
- temperature
- substrate
- additive manufacturing
- heating
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000654 additive Substances 0.000 title claims abstract description 23
- 230000000996 additive effect Effects 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- 230000007774 longterm Effects 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008021 deposition Effects 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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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
- B22F12/30—Platforms or substrates
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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
- B22F12/10—Auxiliary heating means
- B22F12/17—Auxiliary heating means to heat the build chamber or platform
-
- 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
- B22F12/90—Means for process control, e.g. cameras or sensors
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- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Automation & Control Theory (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a brand-new sample preparation base station which can be heated and controlled in temperature, and is specially used for additive manufacturing of various metal parts and structures, the base station can ensure that the temperature of a substrate placed on the base station can reach 1000 ℃ at most, the maximum temperature of the base station can reach 700 ℃ after long-term use, the temperature of the substrate can effectively eliminate residual stress generated in the metal additive manufacturing process, the large deformation of the part in the sample preparation process is avoided, meanwhile, the temperature difference between the substrate and a molten pool can be effectively reduced, the temperature gradient in the molten pool is slowed down, the cooling rate is reduced, and the formation of isometric crystals and balanced microstructures is facilitated. A new way is opened up for controlling the stress deformation and regulating and controlling the microstructure and the mechanical property in the metal additive manufacturing process.
Description
Technical Field
The invention relates to a brand-new sample preparation base station which can be heated and controlled in temperature, and is specially used for additive manufacturing of various metal parts and structures.
Background
Metal additive manufacturing techniques such as laser direct deposition, wire arc additive manufacturing, and plasma additive manufacturing are all stack manufacturing techniques based on micro-molten pool metallurgy. These techniques typically produce melt pools of a few hundred microns to a few millimeters in diameter. When the heat source is removed, the molten pool and the substrateOr a steep temperature gradient exists between solidified solids, so that the metal material is easy to form columnar crystals and textures in the additive manufacturing process, the anisotropy of the mechanical property of the material is caused, and the popularization and the application of the additive manufacturing are limited. In addition, the molten pool will typically be at a very fast rate (10) 3 ～10 6 C/s) solidification and cooling, resulting in the formation of significant residual stresses within the material or component that can cause deformation or cracking of the component. The rapid cooling rate also tends to cause the metal material to form an unbalanced microstructure, which is detrimental to the comprehensive mechanical properties of the material. This is due primarily to the lack of efficient means for preheating the substrate in real time or the low level of preheating (e.g. substrate preheating temperatures below 600 ℃) of existing additive manufacturing techniques. The claim shows that the temperature of the sample preparation base plate can be accurately controlled between room temperature and 1000 ℃ by developing a temperature-controllable sample preparation base plate, the maximum temperature of the base plate can be guaranteed to be above 700 ℃ under the long-term use condition, and the designed maximum temperature is 1000 ℃. The method can effectively slow down the temperature gradient of the molten pool, reduce the cooling rate of the molten pool, thereby reducing the internal stress and deformation, preventing the cracking of parts in the sample preparation process, inhibiting the growth of crystal extension and the formation of columnar crystals, and promoting the formation of equiaxial crystals and balanced microstructures. Meanwhile, the microstructure such as the shape, the size, the orientation, the distribution, the phase structure and the like of grains can be effectively controlled by regulating and controlling the temperature of the substrate, and a technical foundation is laid for manufacturing high-performance metal parts and high-performance parts with gradient microstructures.
The current metal additive manufacturing based on the principle of melt deposition generally lacks an effective substrate preheating device or measure. The reported preheat levels for substrates are also very limited, for example, the maximum preheat temperature is usually below 500 ℃, which is not effective for reducing residual stress and promoting transformation of columnar crystal orientation equiaxed crystal.
Disclosure of Invention
Aiming at the problems, the invention provides a brand-new sample preparation base station which can be heated and has controllable temperature, is specially used for additive manufacturing of various metal parts and structures, and opens up a new way for stress deformation control and microstructure and mechanical property regulation in the metal additive manufacturing process.
The technical effects are realized by the following technical scheme:
a brand-new temperature-controllable heating base station/device is composed of a temperature control unit, high-resistance electric heating alloy wires, a substrate support and a heat insulation/heat preservation enclosing wall, and is equivalent to an open heat treatment furnace; by heating the resistance wires at the bottom and insulating the surrounding heat insulation wall, the base station can ensure that the temperature of the substrate placed on the base station can reach 1000 ℃ at most and 700 ℃ at most after long-term use.
The invention has the beneficial effects that:
the invention ensures that the temperature of the substrate reaches 1000 ℃ at most and 700 ℃ at most after long-term use, and the temperature of the substrate can effectively eliminate residual stress generated in the metal additive manufacturing process, avoid large deformation of a part in the sample preparation process, and improve the quality and the manufacturing stability of the part. Meanwhile, the temperature difference between the substrate and the molten pool can be effectively reduced, the temperature gradient in the molten pool is slowed down, the cooling rate is reduced, the formation of equiaxial crystals and a balanced microstructure is facilitated, the anisotropy degree of the mechanical properties of the part is facilitated to be reduced, and the excellent comprehensive mechanical properties of the material and the part are facilitated to be obtained. The invention can also be used for preparing a sample or a component on the substrate, and after the preparation is finished, the substrate is heated to eliminate the residual stress in the sample or the component or regulate and control the internal microstructure thereof.
Drawings
Fig. 1 is a design diagram of embodiment 1 of the present invention.
Fig. 2 is a diagram of an embodiment 1 of the present invention.
FIG. 3 is a diagram showing the use of embodiment 1 of the present invention.
Detailed Description
The first embodiment is as follows: prior to additive manufacturing, the substrate placed on the stage is preheated as needed to reach a desired fixed temperature-fused deposition additive manufacturing is performed on the substrate to prepare a relevant sample or part while keeping the substrate temperature constant.
Embodiment two: before additive manufacturing, programming the temperature control of a substrate placed on a base table (such as heating/holding temperature, holding time and the like of different stages) according to needs, performing fused deposition additive manufacturing on the substrate to prepare a relevant sample or part, and preparing the sample or part with the microstructure gradient change according to the substrate temperature programming.
The third embodiment is as follows: fused deposition additive manufacturing is performed on a substrate to prepare a relevant sample or part-after the part is prepared, the substrate is heated to a desired temperature to relieve residual stress or alter the microstructure of the sample or part.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A brand-new sample preparation base station which can be heated and has controllable temperature is specially used for additive manufacturing of various metal parts and structures and is characterized in that the brand-new heating base station/device with controllable temperature is composed of a temperature control unit, a high-resistance electric heating alloy wire, a substrate support column and a heat insulation/heat preservation enclosing wall and is equivalent to an open heat treatment furnace; the base station can ensure that the temperature of the substrate placed on the base station can reach 1000 ℃ at most and 700 ℃ at most after long-term use.
2. The system sample base station as claimed in claim 1, wherein the temperature control unit and the high resistance electrothermal alloy wire form a heat source system, and the temperature of the substrate can be monitored and controlled in real time by adjusting and setting parameters of the temperature control unit. The heat insulation/heat preservation enclosing wall and the heat preservation cover plate form a heat preservation system, and a cavity is formed by the heat preservation system and the heat source system, so that the long-term stability of the temperature of the substrate is ensured.
3. The sample preparation base station as claimed in claim 1, wherein the base station support is added to the chamber such that the substrate is placed higher than the resistance wire.
4. The sampling base station as claimed in claim 1, wherein two sets of resistance wire heating modules are provided, which are independent of each other, and can control one set of heating modules or two sets of heating modules to operate simultaneously according to actual heating requirements.
5. An approach for use of the sampling abutment of claim 1, wherein the approach comprises the following categories:
(1) device for preheating substrate in metal additive manufacturing process based on melting deposition principle
(2) Or preparing a sample or part on the substrate, and heating the substrate to eliminate residual stress in the sample or part after the preparation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210773610.XA CN115106543A (en) | 2022-07-01 | 2022-07-01 | Temperature-controllable sample base station for metal additive manufacturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210773610.XA CN115106543A (en) | 2022-07-01 | 2022-07-01 | Temperature-controllable sample base station for metal additive manufacturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115106543A true CN115106543A (en) | 2022-09-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210773610.XA Pending CN115106543A (en) | 2022-07-01 | 2022-07-01 | Temperature-controllable sample base station for metal additive manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115106543A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112276115A (en) * | 2020-11-26 | 2021-01-29 | 上海航天设备制造总厂有限公司 | Heating device for be used for 3D printing apparatus base plate to preheat |
| CN112430811A (en) * | 2020-11-23 | 2021-03-02 | 浙江大学 | Method for laser cladding of copper alloy powder on surface of copper matrix |
| CN112427658A (en) * | 2020-11-23 | 2021-03-02 | 浙江大学 | Preheating and heat-insulating device for laser additive manufacturing |
| CN113414411A (en) * | 2021-06-18 | 2021-09-21 | 武汉大学 | Method for regulating temperature gradient and cooling rate in real time in additive manufacturing process |
| CN113909491A (en) * | 2021-09-26 | 2022-01-11 | 华中科技大学 | EBF additive manufacturing method and system |
| CN216632600U (en) * | 2021-11-18 | 2022-05-31 | 南京前知智能科技有限公司 | Metal 3D printer and substrate heating device thereof |
-
2022
- 2022-07-01 CN CN202210773610.XA patent/CN115106543A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430811A (en) * | 2020-11-23 | 2021-03-02 | 浙江大学 | Method for laser cladding of copper alloy powder on surface of copper matrix |
| CN112427658A (en) * | 2020-11-23 | 2021-03-02 | 浙江大学 | Preheating and heat-insulating device for laser additive manufacturing |
| CN112276115A (en) * | 2020-11-26 | 2021-01-29 | 上海航天设备制造总厂有限公司 | Heating device for be used for 3D printing apparatus base plate to preheat |
| CN113414411A (en) * | 2021-06-18 | 2021-09-21 | 武汉大学 | Method for regulating temperature gradient and cooling rate in real time in additive manufacturing process |
| CN113909491A (en) * | 2021-09-26 | 2022-01-11 | 华中科技大学 | EBF additive manufacturing method and system |
| CN216632600U (en) * | 2021-11-18 | 2022-05-31 | 南京前知智能科技有限公司 | Metal 3D printer and substrate heating device thereof |
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