CN113387688A - Material for preparing ceramic lift tube, ceramic lift tube and preparation method thereof - Google Patents
Material for preparing ceramic lift tube, ceramic lift tube and preparation method thereof Download PDFInfo
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- CN113387688A CN113387688A CN202010173538.8A CN202010173538A CN113387688A CN 113387688 A CN113387688 A CN 113387688A CN 202010173538 A CN202010173538 A CN 202010173538A CN 113387688 A CN113387688 A CN 113387688A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 56
- 239000000463 material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 5
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 44
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 34
- 239000010431 corundum Substances 0.000 claims abstract description 33
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 14
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical group OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 7
- 239000007767 bonding agent Substances 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
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- 238000005303 weighing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 18
- 229910045601 alloy Inorganic materials 0.000 abstract description 13
- 239000000956 alloy Substances 0.000 abstract description 13
- 230000035939 shock Effects 0.000 abstract description 12
- 238000011049 filling Methods 0.000 abstract description 8
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- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
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- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
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- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
The invention provides a material for preparing a ceramic lift tube, the ceramic lift tube and a preparation method thereof, wherein the material for preparing the ceramic lift tube is prepared from the following raw materials in parts by weight: 45-55 parts of corundum, 35-45 parts of mullite and 5-15 parts of zircon. The ceramic lift tube prepared from the material has the characteristics of high temperature resistance, pressure resistance, erosion resistance, excellent shock resistance and the like, can generate thermal shock to the lift tube in the stages of vacuumizing, filling, pressurizing and pressure maintaining in the anti-gravity casting process of the high-temperature alloy, has good thermal shock resistance by adopting mullite and zirconite, and can ensure that the lift tube is not damaged in the whole experiment process.
Description
Technical Field
The invention relates to the field of refractory materials, in particular to a material for preparing a ceramic lift tube, a method for preparing a high-temperature alloy antigravity cast ceramic lift tube by using the material and the ceramic lift tube prepared by the method.
Background
The great demands of the advanced aeroengine on high thrust and light weight drive the application of complex thin-wall and ultrathin-wall high-temperature alloy castings to be more and more. The solidification change process of the casting in a complex limited space (the inner cavity and the appearance are particularly complex, the wall thickness delta is less than or equal to 1.0mm, and gravity filling is extremely difficult) is difficult to directly describe by the high-temperature alloy structure evolution law and the defect forming mechanism under the traditional gravity condition, which brings challenges for perfect forming and metallurgical quality improvement of high-temperature alloy complex thin-wall castings used on aero-engines. Correspondingly, the requirements on the structure and the performance of the high-temperature alloy casting are higher and higher, and the manufacturing difficulty is increased continuously. The pressure-regulating casting can enable the thin-wall casting to be completely filled with the mold and to be solidified under pressure, and the mechanical property and the internal metallurgical quality of the casting can be improved.
In the antigravity casting process of high-temperature alloy, high-temperature molten metal (about 1500 ℃) is pumped into a formwork through a lift pipe, and due to rapid temperature change and uneven heating, great temperature difference and thermal stress generated by the temperature difference can occur, and the high-temperature molten metal flowing at high speed can erode and corrode the inner wall of the lift pipe. The lift tube is a key component for bearing the transportation of high-temperature metal melt, and the quality and stability of the lift tube are very important. In the process of pressure-regulating casting of the high-temperature alloy, the pressure of the lower tank body can reach 0.6-0.8 MPa, and the lift tube is under the action of great pressure. Therefore, the liquid lift tube for antigravity casting of high-temperature alloy needs to have good high-temperature mechanical properties, particularly thermal shock resistance, impact resistance and molten metal erosion corrosion resistance.
Through the literature search of the prior art, the following findings are found: the Chinese patent with application number 201610645688.8 discloses a formula of a lift tube and a preparation method thereof, the lift tube is prepared by 85-95 wt% of dense corundum, 5-15 wt% of chromium material and 8-15 wt% of bonding agent of the two ingredients, can be used for low-pressure casting and vacuum suction casting of aluminum-magnesium alloy, is suitable for relatively low temperature, and is generally used below 700 ℃. The thermal shock resistance requirement in the antigravity casting process of the high-temperature alloy is high, the use temperature is high, and the liquid lifting tube cannot be applied.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a material for preparing a ceramic lift tube, the ceramic lift tube and a preparation method thereof, and the ceramic lift tube can be used for high-temperature alloy antigravity pressure regulation, counter-pressure and low-pressure casting.
According to a first aspect of the invention, there is provided a material for use in the manufacture of a ceramic lift tube, the material comprising the following raw materials in parts by weight: 45-55 parts of corundum, 35-45 parts of mullite and 5-15 parts of zircon.
Preferably, the corundum component is alpha-Al2O3。
Preferably, the mullite consists of the following components in percentage by mass: al (Al)2O371.8 to 77.2 percent of SiO222.8 to 28.2 percent.
Preferably, the granularity of the mullite is 0.5-3 mm. The mullite with the granularity range can enhance the strength and the shock resistance of the lift tube.
Preferably, the material consists of the following components in parts by weight: 50-55 parts of corundum, 40-45 parts of mullite and 10-15 parts of zircon.
According to a second aspect of the present invention, there is provided a method of manufacturing a ceramic lift tube, comprising,
weighing 45-55 parts of corundum, 35-45 parts of mullite and 5-15 parts of zirconite according to parts by weight, mixing and stirring the raw materials for 2-4 hours to obtain a mixture;
adding a bonding agent into the mixture, fully and uniformly mixing the bonding agent and the mixture, then obtaining a ceramic blank by adopting a mechanical pressing method, drying the ceramic blank, and sintering at 1650-1750 ℃ to obtain the ceramic lift tube.
Preferably, the binding agent is sulfite pulp waste liquor or pure calcium aluminate cement. The binding agent is used for binding the corundum powder and the mullite together.
Preferably, the drying time is 48 to 72 hours.
Compared with the prior art, the invention has at least one of the following beneficial effects:
the ceramic lift tube prepared from the material has the characteristics of high temperature resistance, pressure resistance, erosion resistance, excellent shock resistance and the like, the temperature of a metal liquid can reach 1400 ℃ plus 1550 ℃ in the anti-gravity casting process of the high-temperature alloy, the pressure of a lower tank can reach 0.6-0.8 Mpa, and thermal shock can be generated on the lift tube in the stages of vacuumizing, filling, pressurizing and pressure maintaining.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of a lift tube in a preferred embodiment of the present invention.
The labels in the figures are: 1 is a boss.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
This example provides a material for preparing a ceramic lift tube, where the material for the ceramic lift tube is composed of the following raw materials in parts by weight: 50 parts of corundum, 40 parts of mullite and 10 parts of zirconite, wherein mullite particles are used as aggregate, and the corundum and the mullite are prepared by mixing the corundum, the mullite and the zirconThe granularity is 0.7mm, and the mullite with the granularity can enhance the strength and the shock resistance of the lift tube. Corundum and zircon are used as powder. Wherein the corundum contains alpha-Al as main component2O3The selected mullite consists of the following components in percentage by mass: al (Al)2O375.6% of SiO2The content is 24.4 percent, and the mullite is artificially synthesized by a sintering method.
The ceramic lift tube made of the material can be prepared by the following method, and the specific steps are as follows:
weighing 50 parts of corundum, 40 parts of mullite and 10 parts of zirconite according to the parts by weight, and stirring for about 2 hours by using a stirrer to obtain a mixture.
And step two, taking the sulfurous acid pulp waste liquid as a binding agent, wherein the binding agent is used for binding the corundum powder and the mullite together, adding the sulfurous acid pulp waste liquid accounting for 7% of the total weight of the three ingredients into the mixture obtained in the step one, fully and uniformly mixing the sulfurous acid pulp waste liquid and the mixture, forming by using a machine pressing method to obtain a ceramic blank, drying the ceramic blank for 48 hours, and sintering at 1650 ℃ to obtain the ceramic lift tube.
Example 2
This example provides a material for preparing a ceramic lift tube, where the material for the ceramic lift tube is composed of the following raw materials in parts by weight: 55 parts of corundum, 40 parts of mullite and 5 parts of zirconite, wherein mullite particles are used as aggregate, the granularity of the aggregate is 2mm, and the strength and the shock resistance of the riser tube can be enhanced by selecting the mullite with the granularity. Corundum and zircon are used as powder. Wherein the corundum contains alpha-Al as main component2O3The selected mullite consists of the following components in percentage by mass: al (Al)2O374.5% of SiO2The content was 25.5%. The mullite is artificially synthesized by an electric melting method.
The ceramic lift tube made of the material can be prepared by the following method, and the specific steps are as follows:
step one, weighing 55 parts of corundum, 40 parts of mullite and 5 parts of zircon according to parts by weight, and stirring for about 2 hours by using a stirrer to obtain a mixture.
And step two, taking the sulfurous acid pulp waste liquid as a binding agent, wherein the binding agent is used for binding the corundum powder and the mullite together, adding the sulfurous acid pulp waste liquid accounting for 9 percent of the total weight of the three ingredients into the mixture, fully and uniformly mixing the sulfurous acid pulp waste liquid and the mixture, forming by adopting a machine pressing method to obtain a ceramic blank, drying the ceramic blank for 60 hours, and sintering at 1650 ℃ to obtain the ceramic lift tube.
Example 3
This example provides a material for preparing a ceramic lift tube, where the material for the ceramic lift tube is composed of the following raw materials in parts by weight: 50 parts of corundum, 36 parts of mullite and 14 parts of zirconite, wherein mullite particles are used as aggregate, the granularity of the aggregate is 2.5mm, and the strength and the shock resistance of the riser tube can be enhanced by selecting the mullite with the granularity. Corundum and zircon are used as powder. Wherein the corundum contains alpha-Al as main component2O3The selected mullite consists of the following components in percentage by mass: al (Al)2O3The content is 73.6 percent and SiO2The content was 26.4%. The mullite is artificially synthesized by an electric melting method.
The ceramic lift tube made of the material can be prepared by the following method, and the specific steps are as follows:
weighing 50 parts of corundum, 36 parts of mullite and 14 parts of zircon according to parts by weight, and stirring for about 3 hours by using a stirrer to obtain a mixture.
And step two, taking the sulfurous acid pulp waste liquid as a binding agent, wherein the binding agent is used for binding the corundum powder and the mullite together, adding the sulfurous acid pulp waste liquid accounting for 10% of the total weight of the three ingredients into the mixture, fully and uniformly mixing the sulfurous acid pulp waste liquid and the mixture, forming by adopting a machine pressing method to obtain a ceramic blank, drying the ceramic blank for 60 hours, and sintering at 1720 ℃ to obtain the ceramic lift tube.
Example 4
This example provides a material for making a ceramic lift tube, ceramicThe porcelain lift tube is made of the following raw materials in parts by weight: 46 parts of corundum, 44 parts of mullite and 10 parts of zirconite, wherein mullite particles are used as aggregate, the granularity of the aggregate is 3mm, and the strength and the shock resistance of the riser tube can be enhanced by selecting the mullite with the granularity. Corundum and zircon are used as powder. Wherein the corundum contains alpha-Al as main component2O3The selected mullite consists of the following components in percentage by mass: al (Al)2O376.2% of SiO2The content was 23.8%. The mullite is artificially synthesized by an electric melting method.
The ceramic lift tube made of the material can be prepared by the following method, and the specific steps are as follows:
weighing 46 parts of corundum, 44 parts of mullite and 10 parts of zircon according to parts by weight, and stirring for about 4 hours by using a stirrer to obtain a mixture.
And step two, adopting pure calcium aluminate cement as a binding agent, wherein the binding agent is used for binding corundum powder and mullite together, adding the pure calcium aluminate cement accounting for 8% of the total weight of the three ingredients into the mixture, fully and uniformly mixing the sulfurous acid pulp waste liquid and the mixture, forming by adopting a machine pressing method to obtain a ceramic blank, drying the ceramic blank for 60 hours, and sintering at 1750 ℃ to obtain the ceramic lift tube.
In the experimental process of the antigravity casting of the high-temperature alloy, referring to a structure of a ceramic lift tube shown in figure 1, the lower end of the ceramic lift tube is placed in a crucible to be contacted with molten metal, and a boss 1 at the upper end is connected with a shell. Pressure-controlled casting experiments were carried out on the lift tubes obtained in examples 1 to 2, and the results are shown in the following table:
| serial number | Performance of | Example 1 | Example 2 | Example 3 | Example 4 |
| 1 | Corrosion resistance of lift tube | No obvious corrosion | No obvious corrosion | No obvious corrosion | No obvious corrosion |
| 2 | Pressure resistance of lift tube | Without damage | Without damage | Without damage | Without damage |
| 3 | Shell mold filling result | Good mold filling | Good mold filling | Good mold filling | Good mold filling |
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (8)
1. The material for preparing the ceramic lift tube is characterized by comprising the following components in parts by weight: 45-55 parts of corundum, 35-45 parts of mullite and 5-15 parts of zircon.
2. The material for manufacturing a ceramic lift tube as set forth in claim 1, wherein the corundum component is α -Al2O3。
3. The material for preparing the ceramic lift tube according to claim 1, wherein the mullite consists of the following components in percentage by mass: al (Al)2O371.8 to 77.2 percent of SiO222.8 to 28.2 percent.
4. The material for preparing the ceramic lift tube according to any one of claims 1 to 3, wherein the mullite has a grain size of 0.5-3 mm.
5. The material for preparing the ceramic lift tube of claim 1, wherein the material is composed of the following components in parts by weight: 50-55 parts of corundum, 40-45 parts of mullite and 10-15 parts of zircon.
6. A method of making a ceramic lift tube, using the material of any one of claims 1 to 4, comprising:
weighing 45-55 parts of corundum, 35-45 parts of mullite and 5-15 parts of zirconite according to parts by weight, mixing and stirring the raw materials for 2-4 hours to obtain a mixture;
adding a bonding agent into the mixture, fully and uniformly mixing the bonding agent and the mixture, then obtaining a ceramic blank by adopting a mechanical pressing method, drying the ceramic blank, and sintering at 1650-1750 ℃ to obtain the ceramic lift tube.
7. The method for preparing a ceramic lift tube according to claim 6, wherein the bonding agent is sulfurous acid pulp waste liquid or pure calcium aluminate cement.
8. The method for preparing a ceramic lift tube according to claim 6, wherein the drying time is 48-72 hours.
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| CN202010173538.8A CN113387688A (en) | 2020-03-13 | 2020-03-13 | Material for preparing ceramic lift tube, ceramic lift tube and preparation method thereof |
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| CN202010173538.8A CN113387688A (en) | 2020-03-13 | 2020-03-13 | Material for preparing ceramic lift tube, ceramic lift tube and preparation method thereof |
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