CN117182072A - Preparation method and equipment of large-section sintered material and large-section sintered material - Google Patents
Preparation method and equipment of large-section sintered material and large-section sintered material Download PDFInfo
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- CN117182072A CN117182072A CN202311163824.6A CN202311163824A CN117182072A CN 117182072 A CN117182072 A CN 117182072A CN 202311163824 A CN202311163824 A CN 202311163824A CN 117182072 A CN117182072 A CN 117182072A
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- sintered material
- sintering
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- 239000000463 material Substances 0.000 title claims abstract description 111
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 99
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012943 hotmelt Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- -1 powder metallurgy Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a preparation method of a large-section sintered material, which comprises the following steps: s1, blank making: pressing the powdery material into a honeycomb sintered material blank; s2, sintering: when the sintered material blank is in a vacuum sintering environment, the sintering temperature of each honeycomb hole is independently controlled until the sintering is completed; when the sintered material blank is in an atmosphere sintering environment, the sintering temperature, air pressure and atmosphere type of each honeycomb hole are independently controlled until the sintering is completed. The large-section sintered material provided by the invention is a sintered material with a honeycomb section. The invention provides a preparation device of a large-section sintered material, which comprises the following components: a container, a built-in tube, and a heating assembly installed inside the built-in tube; the built-in pipe comprises a built-in pipe for vacuum sintering and a built-in pipe for atmosphere sintering, and a plurality of air holes are formed in the middle section of the built-in pipe for atmosphere sintering. The invention can avoid the uneven performance of the large-section sintering material caused by uneven sintering conditions, and further obtain the sintering material with customized performance of each part.
Description
Technical Field
The invention relates to the technical field of preparation of sintered materials, in particular to a preparation method and equipment of a large-section sintered material and the large-section sintered material.
Background
The sintered material is a compact body formed by mixing and compacting powdery materials and then sintering and converting the powdery materials at high temperature, and is a material of a traditional preparation process. Sintering processes have long been used to produce ceramics, powder metallurgy, refractory materials, ultra-high temperature materials, and the like.
During sintering, temperature, atmosphere, gas pressure, etc. can affect the properties of the final sintered material. For large section sintered materials, there must be differences in the environment of the material surface and core during sintering, such as temperature non-uniformities. Resulting in a sintered large section material with inconsistent surface and core properties and even failure to achieve the desired material properties.
Disclosure of Invention
In order to solve the technical problems in the background art, the preparation method and equipment of the large-section sintered material and the large-section sintered material provided by the invention are provided.
The preparation method of the large-section sintered material provided by the invention comprises the following steps:
s1, blank making: pressing the powdery material into a honeycomb sintered material blank;
s2, sintering: when the sintered material blank is in a vacuum sintering environment, the sintering temperature of each honeycomb hole is independently controlled until the sintering is completed;
when the sintered material blank is in an atmosphere sintering environment, the sintering temperature, air pressure and atmosphere type of each honeycomb hole are independently controlled until the sintering is completed.
Preferably, in S2, the vacuum sintering specific sintering method is as follows:
placing the sintered material blank in a vacuum container, inserting an internal pipe into each honeycomb hole of the sintered material blank, and sealing the outer wall of the internal pipe and the inner wall of the honeycomb hole in a hot melt manner, wherein two ends of the internal pipe are positioned outside the container so as to be communicated with the outside; an independently controlled heating assembly is arranged inside each built-in pipe;
the specific sintering method of atmosphere sintering is as follows:
placing the sintered material blank in a container, inserting an internal pipe into each honeycomb hole of the sintered material blank, and arranging a plurality of air holes at the position of the internal pipe positioned in the honeycomb holes, so that the two ends of the internal pipe are positioned outside the container and communicated with the outside; meanwhile, a sealing structure is arranged between the end parts of the two ends of each honeycomb hole and the outer wall of the built-in pipe positioned in the honeycomb hole, an independently controlled heating component is arranged in each built-in pipe, and each built-in pipe is connected with an independently controlled air source and an air pressure monitor for monitoring air pressure.
Preferably, the heating assembly comprises a heating element and a temperature measuring element.
Preferably, the inner tube is a quartz tube.
The large-section sintered material provided by the invention is a honeycomb-shaped section sintered material prepared by adopting the preparation method of the large-section sintered material.
The invention provides a preparation device of a large-section sintered material, which comprises the following components: a container for accommodating the sintered material green body, a built-in tube and a heating assembly installed inside the built-in tube;
the built-in pipe comprises a built-in pipe for vacuum sintering in a vacuum sintering environment and a built-in pipe for atmosphere sintering in an atmosphere sintering environment, and a plurality of air holes are formed in the middle section of the built-in pipe for atmosphere sintering.
Preferably, the container comprises a cylinder body and cover plates arranged at two ends of the cylinder body, a plurality of holes are formed in the cover plates, the number and arrangement mode of the holes are adapted according to the number and arrangement mode of honeycomb holes in the sintered material blank body, and when the sintered material blank body is put into the container, the holes in the cover plates are in one-to-one correspondence with the honeycomb holes in the sintered material blank body.
According to the invention, the sintering material is arranged into a honeycomb structure, and the temperature, the air pressure and the atmosphere in each honeycomb hole can be independently controlled, so that the fine control of the sintering parameters of all parts of the large-section sintering material is realized, and the large-section sintering material with uniform performance can be prepared; in addition, different sintering parameters of different parts can be respectively customized according to requirements in the sintering process, so that the sintering material with customized performance of each part can be obtained. And two built-in pipe structures are designed to adapt to different sintering atmosphere requirements.
In summary, compared with the prior art, the method can avoid uneven performance of the large-section sintered material caused by uneven sintering conditions, and can obtain the sintered material with customized performance of each part.
Drawings
FIG. 1 is a schematic diagram of a sintered material blank in a method for producing a large-section sintered material according to the present invention;
FIG. 2 is a schematic diagram showing the assembly of the heating element and the inner tube in the method for preparing the large-section sintered material according to the present invention;
FIG. 3 is a schematic diagram showing a sintering flow of the sintered material blank in the method for preparing a large-section sintered material according to the present invention;
FIG. 4 is a schematic diagram showing the assembly relationship between the sintered body and the container and the inner tube in the method for preparing the large-section sintered material according to the present invention;
FIG. 5 is a schematic view of the structure of the vacuum sintering inner tube in the large-section sintered material preparation apparatus according to the present invention;
FIG. 6 is a schematic view of the structure of the built-in tube for atmosphere sintering in the large-section sintered material preparing apparatus according to the present invention;
fig. 7 is a schematic structural view of a large-section sintered material preparation apparatus according to the present invention.
Detailed Description
Referring to fig. 1 to 4, the preparation method of the large-section sintered material provided by the invention comprises the following steps:
s1, blank making: the powdery material is pressed into a honeycomb sintered material blank 1, in particular: pouring the powder obtained by uniformly mixing the components in proportion into a mould for pressing to form a honeycomb sintered material blank 1;
s2, sintering: 1. when the sintered material green body 1 is in a vacuum sintering environment, the sintering temperature of each honeycomb hole is independently controlled until the sintering is completed, and the specific method is as follows:
placing the sintered material green body 1 in a container 5, and putting the interior of the container 5 in a vacuum state; inserting an inner tube 3 into each honeycomb hole of the sintered material blank 1, and performing hot melt sealing on the outer wall of the inner tube 3 and the inner wall of the honeycomb hole, wherein two ends of the inner tube 3 are positioned outside the container 5 so as to be communicated with the outside; an independently controlled heating component 2 is arranged inside each built-in pipe 3, so that the temperature of each honeycomb hole can be controlled respectively in the vacuum sintering process;
2. when the sintered material blank 1 is in an atmosphere sintering environment, the sintering temperature, air pressure and atmosphere type of each honeycomb hole are independently controlled until the sintering is completed, and the specific method is as follows:
placing the sintered material blank 1 body in a container 5, inserting an internal pipe 3 into each honeycomb hole of the sintered material blank 1, and opening a plurality of air holes 4 at the position of the internal pipe 3 positioned in the honeycomb holes, so that the two ends of the internal pipe 3 are positioned outside the container 5 and communicated with the outside; meanwhile, a sealing structure is arranged between the end parts of the two ends of each honeycomb hole and the outer wall of the built-in pipe 3 positioned in the honeycomb hole, an independently controlled heating component 2 is arranged in each built-in pipe 3, and each built-in pipe 3 is connected with an independently controlled air source and an air pressure monitor for monitoring air pressure, so that the temperature, the atmosphere and the air pressure of each honeycomb hole can be respectively controlled in the atmosphere sintering process.
In this embodiment, the heating assembly 2 includes a heating element and a temperature measuring element.
In this embodiment, the inner tube 3 is a quartz tube.
From the above, the sintering material is arranged into a honeycomb structure, so that the fine control of sintering parameters of all parts can be realized through the honeycomb holes in the sintering material in the sintering process, and the large-section sintering material with uniform performance can be prepared. Further, in the sintering process, by changing different sintering parameters of different parts, the sintering material with customized performance of each part can be obtained.
In summary, compared with the prior art, the invention can avoid the uneven performance of the large-section sintering material caused by uneven sintering conditions, and can further obtain the sintering material with customized performance at each position.
The large-section sintered material provided by the invention is a honeycomb-shaped section sintered material prepared by adopting the preparation method of the large-section sintered material.
Referring to fig. 5 to 7, the present invention provides an apparatus for preparing a large-section sintered material, comprising: a container 5 for accommodating the sintered material green body, the inner tube 3 and the heating assembly 2 installed inside the inner tube 3;
the inner tube 3 includes a vacuum sintering inner tube 31 for vacuum sintering and an atmosphere sintering inner tube 32 for atmosphere sintering, and a plurality of air holes 4 are formed in the middle section of the atmosphere sintering inner tube 32.
In the vacuum sintering state, the vacuum sintering inner tubes 31 are inserted into the honeycomb holes of the sintered material green body 1 in a one-to-one correspondence, and both ends of the vacuum sintering inner tube 31 are located outside the container 5 to be communicated with the outside.
In the atmosphere sintering state, the built-in pipes 32 for atmosphere sintering are correspondingly inserted into the honeycomb holes of the sintering material blank 1 one by one, both ends of the built-in pipes 32 for atmosphere sintering are positioned outside the container 5 to be communicated with the outside, the area where the air holes 4 are positioned on the built-in pipes 32 for atmosphere sintering are positioned inside the honeycomb holes, and a sealing structure is arranged between the outer walls of the built-in pipes 32 for atmosphere sintering and the ports at both ends of the honeycomb holes so that the atmosphere introduced into the built-in pipes 32 for atmosphere sintering can enter the sintering material blank 1 through the air holes 4; one end of each built-in tube 32 for atmosphere sintering is connected with an independent air source and an air pressure monitor respectively to realize independent control of the temperature, atmosphere and air pressure in each honeycomb hole.
In addition, the container 5 in this embodiment includes a cylinder 51 and cover plates 52 mounted at two ends of the cylinder 51, the cover plates 52 are provided with a plurality of holes, and the number and arrangement of the holes are adapted according to the number and arrangement of the honeycomb holes in the sintered material blank 1, so that when the sintered material blank 1 is loaded into the container 5, the holes on the cover plates 52 correspond to the honeycomb holes in the sintered material blank 1 one by one. In the sintered state, the vacuum built-in pipe 31 or the built-in pipe 32 for atmosphere sintering penetrates into each honeycomb hole of the sintered material green body 1 through the hole in the cover plate 52.
From the above, the invention sets the built-in pipe 3 structure with two specifications to adapt to different sintering atmosphere requirements.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The preparation method of the large-section sintered material is characterized by comprising the following steps of:
s1, blank making: pressing the powdery material into a honeycomb sintered material blank (1);
s2, sintering: when the sintered material blank (1) is in a vacuum sintering environment, the sintering temperature of each honeycomb hole is independently controlled until the sintering is completed;
when the sintered material blank (1) is in an atmosphere sintering environment, the sintering temperature, air pressure and atmosphere type of each honeycomb hole are independently controlled until the sintering is completed.
2. The method for producing a large-section sintered material according to claim 1, wherein in S2, the vacuum sintering is specifically carried out as follows:
placing the sintered material blank (1) in a container (5) and placing the interior of the container (5) in a vacuum state; inserting an inner tube (3) into each honeycomb hole of the sintered material blank body (1), and sealing the outer wall of the inner tube (3) and the inner wall of the honeycomb hole in a hot melt manner, wherein two ends of the inner tube (3) are positioned outside the container (5) so as to be communicated with the outside; an independently controlled heating assembly (2) is arranged inside each built-in pipe (3);
the specific sintering method of atmosphere sintering is as follows:
placing the sintered material blank (1) in a container (5), inserting an internal pipe (3) into each honeycomb hole of the sintered material blank (1), and arranging a plurality of air holes (4) at the position of the internal pipe (3) positioned in the honeycomb holes, so that two ends of the internal pipe (3) are positioned outside the container (5) and communicated with the outside; meanwhile, a sealing structure is arranged between the end parts of the two ends of each honeycomb hole and the outer wall of the built-in pipe (3) positioned in the honeycomb hole, an independently controlled heating component (2) is arranged in each built-in pipe (3), and each built-in pipe (3) is connected with an independently controlled air source and an air pressure monitor for monitoring air pressure.
3. A method of producing a large section sintered material according to claim 2, characterized in that the heating assembly (2) comprises a heating element and a temperature measuring element.
4. A method for the preparation of a large section sintered material according to claim 2, characterized in that the inner tube (3) is a quartz tube.
5. A large-section sintered material characterized in that the large-section sintered material is a sintered material having a honeycomb shape in section produced by the production method of the large-section sintered material according to any one of claims 1 to 4.
6. An apparatus for producing a large-section sintered material, comprising: a container (5) for receiving the sintered material body (1), and a built-in tube (3) and a heating element (2) mounted inside the built-in tube (3);
the inner tube (3) comprises an inner tube (31) for vacuum sintering in a vacuum sintering environment and an inner tube (32) for atmosphere sintering in an atmosphere sintering environment, and a plurality of air holes (4) are formed in the middle section of the inner tube (32) for atmosphere sintering.
7. The equipment for preparing the large-section sintered material according to claim 6, wherein the container (5) comprises a cylinder and cover plates (52) arranged at two ends of the cylinder (51), a plurality of holes are formed in the cover plates (52), and the number and arrangement of the holes are adapted according to the number and arrangement of the honeycomb holes in the sintered material blank (1) so that when the sintered material blank (1) is loaded into the container (5), the holes in the cover plates (52) are in one-to-one correspondence with the honeycomb holes in the sintered material blank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311163824.6A CN117182072A (en) | 2023-09-11 | 2023-09-11 | Preparation method and equipment of large-section sintered material and large-section sintered material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311163824.6A CN117182072A (en) | 2023-09-11 | 2023-09-11 | Preparation method and equipment of large-section sintered material and large-section sintered material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117182072A true CN117182072A (en) | 2023-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311163824.6A Pending CN117182072A (en) | 2023-09-11 | 2023-09-11 | Preparation method and equipment of large-section sintered material and large-section sintered material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117182072A (en) |
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2023
- 2023-09-11 CN CN202311163824.6A patent/CN117182072A/en active Pending
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