CN108097888B - Preparation method of high-temperature alloy tubular sample - Google Patents
Preparation method of high-temperature alloy tubular sample Download PDFInfo
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- CN108097888B CN108097888B CN201611056570.8A CN201611056570A CN108097888B CN 108097888 B CN108097888 B CN 108097888B CN 201611056570 A CN201611056570 A CN 201611056570A CN 108097888 B CN108097888 B CN 108097888B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
Abstract
the invention aims to provide a preparation method for preparing a high-temperature alloy high-dimensional precision tubular sample, which comprises the steps of preparing the tubular sample by adopting a precision casting process, forming an inner cavity of the tubular sample by using a special ceramic core, pressing a wax mold, preparing a shell, casting, cleaning the shell and removing the core of the combined ceramic core, and finally preparing the tubular sample; the special ceramic core is composed of a ceramic core base and a ceramic tube, wherein the ceramic core base is formed by integrally pressing two mutually vertical solid ceramic column structures, the ceramic tube is a hollow ceramic tube, the outer diameter phi 2 of the ceramic tube is 1-3 mm larger than the inner diameter phi 1, when the ceramic tube is used, the ceramic tube is sleeved on a certain ceramic column of the ceramic core base, and the joint between the ceramic tube and the ceramic core base is bonded and sealed by ceramic slurry. According to the method, a ceramic tube with high stability and creep resistance at high temperature is stably connected with a ceramic core base to form a tubular sample inner cavity, so that the purpose of preparing a tubular sample with high dimensional accuracy and uniform wall thickness is achieved.
Description
Technical Field
the invention belongs to the technical field of casting high-temperature alloy, and particularly provides a preparation method of a high-temperature alloy tubular sample.
Background
With the rapid development of science and technology and the continuous improvement of demand, the requirements of people on turbine blades of aeroengines are more and more strict. The nickel-based superalloy is widely applied to the fields of aviation, aerospace and the like due to high room temperature and high temperature strength, good plasticity and fracture toughness, excellent creep and fatigue resistance, good high temperature structure stability and use reliability, good oxidation resistance and corrosion resistance and the like. However, a single material does not fully satisfy the engine requirements and cooling techniques must be employed. With the increase of the temperature of the turbine inlet, the requirement on the cooling effect of the blade is increasingly increased, the inner cavity structure of the air-cooled blade is increasingly complex, the wall thickness difference of the blade is increased, the thickness of the blade can reach 3-10 mm, and the thickness of the blade is only 0.3-0.8 mm. The difference in thickness and shape will inevitably bring about a difference in performance, that is, a certain dimensional effect. At present, various properties of materials are basically measured by adopting simple plate-type samples, but the difference between the properties and the actual structure of the blade is too large, and the actual properties of different parts of the blade cannot be accurately reflected. The performance of the tubular sample is closer to the actual condition of the blade and can be accurately quantified, but the dimensional deviation of the tubular sample is large, particularly the wall thickness is difficult to be uniform, and the prepared sample cannot accurately reflect the difference of the actual performance brought by the dimensional effect. The invention provides a preparation process method for preparing a tubular sample with high dimensional accuracy and uniform wall thickness.
disclosure of Invention
the invention aims to provide a preparation process method for preparing a high-temperature alloy high-dimensional precision tubular sample, which utilizes a ceramic tube with high stability and creep resistance at high temperature to form stable connection with a ceramic core base so as to form a tubular sample inner cavity, thereby achieving the purpose of preparing the tubular sample with high dimensional precision and uniform wall thickness, and the specific scheme is as follows:
a preparation method of a tubular sample for measuring the performance of high-temperature alloy is characterized by comprising the following steps: preparing a tubular sample by adopting a precision casting process, and forming an inner cavity of the tubular sample by using a special ceramic core; the special ceramic core is composed of a ceramic core base 1 and a ceramic tube 2 (see figures 1 and 2), wherein:
The ceramic core base 1 is a cross-shaped columnar ceramic core (formed by integrally pressing two mutually perpendicular solid ceramic column structures), the ceramic tube 2 is a hollow ceramic tube, the outer diameter phi 2 of the ceramic tube is 1-3 mm larger than the inner diameter phi 1, when the ceramic core base is used, the ceramic tube 2 is sleeved on a certain ceramic column of the ceramic core base 1, and the joint of the ceramic tube 2 and the ceramic column of the ceramic core base 1 is bonded and sealed by ceramic slurry.
as a preferred embodiment:
The ceramic core base 1 is made of alumina material, and the purity of alumina is more than 99 percent; the ceramic tube 2 is a high-purity quartz glass tube, and the purity of quartz is more than 99.9 percent.
The length of the two ceramic columns forming the ceramic core base 1 is 20-40 mm, the section diameters of the two ceramic columns are phi 3 and phi 4 respectively, the value ranges of the phi 3 and the phi 4 are 3-20 mm, and the inner diameter phi 1 of the ceramic tube 2 is 0.1-0.5 mm larger than the section diameter phi 3 or the phi 4 of the ceramic column; the length L of the ceramic tube 2 is 80-250 mm.
The invention relates to a preparation method of a tubular sample for measuring the performance of a high-temperature alloy, which comprises the following specific steps:
1) Preparing a ceramic core base 1 and a ceramic tube 2;
2) Combining the ceramic core base 1 and the ceramic tube 2, and bonding and sealing the joint of the ceramic tube 2 and the ceramic core base 1 by using ceramic slurry;
3) Placing the combined ceramic core in a mould to press a wax mould, and then combining the wax mould with a pouring system;
4) Coating the combined wax mould to prepare a mould shell;
5) carrying out roasting and casting after dewaxing the mould shell, and then cleaning the shell;
6) Removing the core of the sample after shell cleaning;
7) And cleaning the casting to finally prepare the tubular sample.
the ceramic slurry consists of corundum powder and silica sol in a mass ratio of 3.3-3.5:1, and the ceramic tube 2 and the ceramic core base 1 are dried in the air for 10-20 hours after being bonded at the joint.
in the invention, the molding pressure of the tubular wax mold is 0.3-0.6MPa, the injection time is 20-50 seconds, and the pressure maintaining time is 20-60 seconds.
In the invention, the shell manufacturing process is carried out by adopting a high-temperature alloy precision casting process.
In the invention, the sample is cast by adopting the isometric crystal, directional column crystal or single crystal solidification process.
in the invention, the sample is subjected to decortication treatment after being shelled, the decortication medium is an aqueous solution of sodium hydroxide or potassium hydroxide with the concentration of 35-45%, the temperature of 160-190 ℃ and the pressure of 0.3-0.8MPa for 8-20 hours, and then the sample is cleaned and finally dried to obtain the tubular sample.
drawings
FIG. 1 is a schematic view of a ceramic core base construction.
FIG. 2 is a schematic view of the combined structure of the ceramic core (1, ceramic core base 2, ceramic tube).
Fig. 3 shows a prepared wax pattern.
Fig. 4 a tubular specimen prepared.
Detailed Description
As shown in fig. 1 and 2, the ceramic core according to the embodiment of the present invention is composed of a ceramic core base 1 and a ceramic tube 2, wherein the ceramic core base 1 is a cross-shaped cylindrical ceramic core (formed by integrally pressing two mutually perpendicular solid ceramic cylindrical structures), the used material is alumina, and the alumina purity is greater than 99%; the ceramic tube 2 is a high-purity quartz glass tube, and the purity of quartz is more than 99.9 percent.
Example 1
1) preparing a ceramic core, wherein the cross-sectional diameters phi 3 and phi 4 of two mutually perpendicular ceramic columns of a ceramic core base 1 are both 5 millimeters, and the lengths thereof are both 40 millimeters (namely, the lengths a and b in the figure 1 are both 20 millimeters); the inner diameter phi 1 of the ceramic tube 2 is 5.2 mm, the outer diameter phi 2 is 7 mm, and the length L is 200 mm;
2) combining a ceramic core base 1 and a ceramic tube 2, bonding the joint of the ceramic tube 2 and the ceramic core base 1 by using ceramic slurry, wherein the ceramic slurry is composed of corundum powder and silica sol, the mass ratio of the corundum powder to the silica sol is 3.3:1, and drying in the air for 10 hours after bonding;
3) Placing the combined ceramic core in a mould to press a wax mould, wherein the forming pressure of the wax mould is 0.3MPa, the injection time is 20 seconds, the pressure maintaining time is 20 seconds, and the prepared wax mould is shown in figure 3; combining a wax pattern with a gating system;
4) Coating the combined wax mould to prepare a mould shell;
5) dewaxing the mould shell, roasting, and then casting; casting by adopting a single crystal solidification process; cleaning the shell of the sample after casting;
6) performing depoling treatment, wherein the depoling medium is an aqueous solution of potassium hydroxide, the concentration is 35%, the temperature is 190 ℃, the pressure is 0.5MPa, and the time is 20 hours;
7) finally, washing and drying are carried out to obtain a tubular sample, which is shown in figure 4.
the prepared tubular sample has uniform wall thickness and high dimensional precision, and can accurately reflect the difference of actual performance brought by the dimensional effect.
Example 2
1) preparing a ceramic core, wherein the cross-sectional diameters phi 3 and phi 4 of two mutually perpendicular ceramic columns of a ceramic core base 1 are both 8 millimeters, and the lengths of the two ceramic columns are both 20 millimeters; the inner diameter phi 1 of the ceramic tube 2 is 8.1 mm, the outer diameter phi 2 is 10 mm, and the length L is 150 mm;
2) combining the ceramic core base 1 and the ceramic tube 2, bonding the joint of the ceramic tube 2 and the ceramic core base 1 by using ceramic slurry, wherein the ceramic slurry consists of corundum powder and silica sol in a mass ratio of 3.5:1, and drying in the air for 18 hours after bonding;
3) Placing the combined ceramic core in a mould to press a wax mould, wherein the forming pressure of the wax mould is 0.6MPa, the injection time is 50 seconds, the pressure maintaining time is 20 seconds, and the wax mould and a pouring system are combined;
4) coating the combined wax mould to prepare a mould shell;
5) dewaxing the mould shell, roasting, and then casting; the casting adopts an isometric crystal process; cleaning the shell of the sample after casting;
6) Performing depoling treatment, wherein the depoling medium is an aqueous solution of sodium hydroxide, the concentration is 38%, the temperature is 160 ℃, the pressure is 0.8MPa, and the time is 15 hours;
7) and finally, cleaning and drying to obtain the tubular sample.
the prepared tubular sample has uniform wall thickness and high dimensional precision, and can accurately reflect the difference of actual performance brought by the dimensional effect.
Example 3
1) Preparing a ceramic core, wherein the cross-sectional diameters phi 3 and phi 4 of two mutually perpendicular ceramic columns of a ceramic core base 1 are both 10 millimeters, and the lengths of the two ceramic columns are both 40 millimeters; the inner diameter phi 1 of the ceramic tube 2 is 10.5 mm, the outer diameter phi 2 is 13 mm, and the length L is 80 mm;
2) combining the ceramic core base 1 and the ceramic tube 2, bonding the joint of the ceramic tube 2 and the ceramic core base 1 by using ceramic slurry, wherein the ceramic slurry consists of corundum powder and silica sol in a mass ratio of 3.3:1, and drying in the air for 20 hours after bonding;
3) placing the combined ceramic core in a mould to press a wax mould, wherein the forming pressure of the wax mould is 0.4MPa, the injection time is 20 seconds, the pressure maintaining time is 50 seconds, and the wax mould and a pouring system are combined;
4) Coating the combined wax mould to prepare a mould shell;
5) dewaxing the mould shell, roasting, and then casting; the casting adopts a directional process for casting; cleaning the shell of the sample after casting;
6) Performing depoling treatment, wherein the depoling medium is an aqueous solution of sodium hydroxide, the concentration is 45 percent, the temperature is 160 ℃, the pressure is 0.8MPa, and the time is 8 hours;
7) And finally, cleaning and drying to obtain the tubular sample.
The prepared tubular sample has uniform wall thickness and high dimensional precision, and can accurately reflect the difference of actual performance brought by the dimensional effect.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. a preparation method of a tubular sample for measuring the performance of high-temperature alloy is characterized by comprising the following steps: preparing a tubular sample by adopting a precision casting process, and forming an inner cavity of the tubular sample by using a special ceramic core; the special ceramic core is composed of a ceramic core base (1) and a ceramic tube (2), wherein:
the ceramic core base (1) is a cross-shaped columnar ceramic core, the ceramic tube (2) is a hollow ceramic tube, the outer diameter phi 2 of the ceramic tube is 1-3 mm larger than the inner diameter phi 1, and the length L of the ceramic tube (2) is 80-250 mm; the ceramic core base (1) is made of alumina material, and the ceramic tube (2) is a high-purity quartz glass tube;
The method comprises the following specific steps:
1) Preparing a ceramic core base (1) and a ceramic tube (2);
2) combining the ceramic core base (1) with the ceramic tube (2), sleeving the ceramic tube (2) on a certain ceramic column of the ceramic core base (1), and bonding and sealing the joint between the ceramic tube (2) and the ceramic column of the ceramic core base (1) by using ceramic slurry;
3) Placing the combined ceramic core in a mould to press a wax mould, and then combining the wax mould with a pouring system;
4) Coating the combined wax mould to prepare a mould shell;
5) Carrying out roasting and casting after dewaxing the mould shell, and then cleaning the shell;
6) removing the core of the sample after shell cleaning;
7) And cleaning the casting to finally prepare the tubular sample.
2. a method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: the purity of the alumina is more than 99 percent, and the purity of the quartz is more than 99.9 percent.
3. a method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: the length of two ceramic columns on the ceramic core base (1) is 20-40 mm, the section diameters of the two ceramic columns are phi 3 and phi 4 respectively, the value ranges of the phi 3 and the phi 4 are 3-20 mm, and the inner diameter phi 1 of the ceramic tube (2) is 0.1-0.5 mm larger than the section diameter of the ceramic column.
4. A method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: the ceramic slurry consists of corundum powder and silica sol, the mass ratio of the corundum powder to the silica sol is 3.3-3.5:1, and the joint of the ceramic tube (2) and the ceramic core base (1) is dried in the air for 10-20 hours after being bonded by the ceramic slurry.
5. A method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: the molding pressure of the tubular wax mold is 0.3-0.6MPa, the injection time is 20-50 seconds, and the pressure maintaining time is 20-60 seconds.
6. A method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: the shell making process is carried out by adopting a high-temperature alloy precision casting process.
7. A method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: the sample is cast by adopting the isometric crystal, directional column crystal or single crystal solidification process.
8. a method of preparing a tubular specimen for measuring properties of a superalloy as in claim 1, wherein: performing depoling treatment on the sample after cleaning the shell, wherein a depoling medium is an aqueous solution of sodium hydroxide or potassium hydroxide, the concentration is 35-45%, the temperature is 160-190 ℃, the pressure is 0.3-0.8MPa, and the time is 8-20 hours, then cleaning, and finally drying to obtain a tubular sample.
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| CN201611056570.8A CN108097888B (en) | 2016-11-25 | 2016-11-25 | Preparation method of high-temperature alloy tubular sample |
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| CN201611056570.8A CN108097888B (en) | 2016-11-25 | 2016-11-25 | Preparation method of high-temperature alloy tubular sample |
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| CN108097888B true CN108097888B (en) | 2019-12-10 |
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| CN108817317A (en) * | 2018-07-06 | 2018-11-16 | 大连金河铸造有限公司 | A kind of improved ram lumen elongated hole blowhole technique |
| CN109574512A (en) * | 2018-11-29 | 2019-04-05 | 中国科学院金属研究所 | High-temperature alloy casting directional solidification quartz glass tube/column High-Temperature Strengthening method |
| CN113909441A (en) * | 2021-10-13 | 2022-01-11 | 北京航空航天大学 | Preparation method of mechanical property test sample for thin wall of cast high-temperature alloy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941053A (en) * | 2009-07-08 | 2011-01-12 | 中国科学院金属研究所 | Preparation method of plate high-temperature alloy casting with high complexity |
| CN104368801A (en) * | 2014-11-07 | 2015-02-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for removing ceramic core of hollow blade of turbine of aircraft engine |
| CN105014017A (en) * | 2015-07-14 | 2015-11-04 | 中国科学院金属研究所 | Complex structure ceramic core combination technology |
| FR3022811A1 (en) * | 2014-06-30 | 2016-01-01 | Snecma | METHOD FOR MANUFACTURING CORE ASSEMBLY FOR MANUFACTURING A DAWN |
| CN205270751U (en) * | 2015-11-17 | 2016-06-01 | 沈阳明禾石英制品有限责任公司 | A inlay combination formula ceramic core for making combustion engine blade foundry goods |
-
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- 2016-11-25 CN CN201611056570.8A patent/CN108097888B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941053A (en) * | 2009-07-08 | 2011-01-12 | 中国科学院金属研究所 | Preparation method of plate high-temperature alloy casting with high complexity |
| FR3022811A1 (en) * | 2014-06-30 | 2016-01-01 | Snecma | METHOD FOR MANUFACTURING CORE ASSEMBLY FOR MANUFACTURING A DAWN |
| CN104368801A (en) * | 2014-11-07 | 2015-02-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for removing ceramic core of hollow blade of turbine of aircraft engine |
| CN105014017A (en) * | 2015-07-14 | 2015-11-04 | 中国科学院金属研究所 | Complex structure ceramic core combination technology |
| CN205270751U (en) * | 2015-11-17 | 2016-06-01 | 沈阳明禾石英制品有限责任公司 | A inlay combination formula ceramic core for making combustion engine blade foundry goods |
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