CN116448032A - Method for testing minimum casting wall thickness of magnesium-lithium alloy sand mould - Google Patents
Method for testing minimum casting wall thickness of magnesium-lithium alloy sand mould Download PDFInfo
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- CN116448032A CN116448032A CN202310118238.3A CN202310118238A CN116448032A CN 116448032 A CN116448032 A CN 116448032A CN 202310118238 A CN202310118238 A CN 202310118238A CN 116448032 A CN116448032 A CN 116448032A
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- 238000005266 casting Methods 0.000 title claims abstract description 160
- 239000001989 lithium alloy Substances 0.000 title claims abstract description 44
- 229910000733 Li alloy Inorganic materials 0.000 title claims abstract description 40
- GCICAPWZNUIIDV-UHFFFAOYSA-N lithium magnesium Chemical compound [Li].[Mg] GCICAPWZNUIIDV-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004576 sand Substances 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 238000007528 sand casting Methods 0.000 claims abstract description 21
- 238000013461 design Methods 0.000 claims abstract description 16
- 244000035744 Hura crepitans Species 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims 1
- 238000007405 data analysis Methods 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 238000010998 test method Methods 0.000 description 5
- 229910019400 Mg—Li Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000011157 data evaluation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 101150038956 cup-4 gene Proteins 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- UQCVYEFSQYEJOJ-UHFFFAOYSA-N [Mg].[Zn].[Zr] Chemical compound [Mg].[Zn].[Zr] UQCVYEFSQYEJOJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- KBMLJKBBKGNETC-UHFFFAOYSA-N magnesium manganese Chemical compound [Mg].[Mn] KBMLJKBBKGNETC-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a method for testing the minimum casting wall thickness of a magnesium-lithium alloy sand mould, which comprises the following steps: 1) Designing the structure and the size of a sample; 2) Designing the structure and the size of a pouring system; 3) Designing a casting process, and a sand box structure and size; 4) Pouring to obtain a sample casting; 5) And judging according to the corners of the sample castings and the casting length. The magnesium-lithium alloy sand casting obtained by the method can cast minimum wall thickness data, and can well guide the design of the sand magnesium-lithium alloy sand casting and the design of the casting process.
Description
Technical Field
The invention relates to the field of casting technology, in particular to a test method, data analysis and evaluation principle of minimum castable wall thickness of a magnesium-lithium alloy sand casting.
Background
The magnesium alloy is composed of magnesium as base and other elementsAnd (3) alloy. The method is characterized in that: has a low density (1.8 g/cm) 3 Left and right), high strength, large elastic modulus, good heat dissipation, good shock absorption, larger impact load bearing capacity than aluminum alloy, and good corrosion resistance to organic matters and alkali. The main alloy elements are aluminum, zinc, manganese, cerium, thorium, a small amount of zirconium or cadmium, etc. The most widely used is magnesium aluminum alloy, followed by magnesium manganese alloy and magnesium zinc zirconium alloy. The method is mainly used for the industrial departments of aviation, aerospace, transportation, chemical industry, rocket and the like.
The Mg-Li alloy belongs to an ultra-light metal material, the density of the Mg-Li alloy is only 1/2 of that of an aluminum alloy, the density of the Mg-Li alloy is 3/4 of that of a traditional magnesium alloy, and the Mg-Li alloy has the characteristics of low density, specific strength, specific rigidity, higher specific elastic modulus and the like, and has good casting performance and cutting processability. The magnesium-lithium alloy belongs to an emerging ultra-light metal material, is gradually applied to aviation, aerospace, military industry and 3C product industry in recent years, is currently used for processing deformed materials, is rarely used for casting production, is rarely disclosed in the casting process condition, and does not find the minimum castable wall thickness parameter of a magnesium-lithium alloy casting during sand casting, including the minimum castable wall thickness parameter of the magnesium-lithium alloy during casting production in the modes of normal pressure, low pressure and the like.
The minimum castable wall thickness parameter of the cast alloy is one of the basic data for the structural design of the casting and is also an important parameter for the design of the casting process. The minimum wall thickness parameter of common alloy castings is summarized through long-term, large-scale and large-scale production practice, and no test method for determining the minimum wall thickness of castings in actual production, especially no report on the determination method of the minimum castable wall thickness when magnesium-lithium alloy is used for producing sand castings, is found.
Therefore, it is a need for a person skilled in the art to provide a test method for minimum castable wall thickness of magnesium-lithium alloy sand cast castings.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a method for testing the minimum castable wall thickness of a magnesium-lithium alloy sand casting, and provides a test scheme for determining the minimum wall thickness during the design of the magnesium-lithium alloy casting and the design of a casting process.
The technical scheme of the invention is as follows: the invention relates to a method for testing the minimum casting wall thickness of a magnesium-lithium alloy sand mould, which is characterized by comprising the following steps: the method for testing the minimum casting wall thickness of the magnesium-lithium alloy sand mould comprises the following steps of:
1) Designing the structure and the size of a sample;
2) Designing the structure and the size of a pouring system;
3) Designing a casting process, and a sand box structure and size;
4) Pouring to obtain a sample casting;
5) And judging according to the corners of the sample castings and the casting length.
Further, the specific steps of step 1) are as follows: four samples are designed, and the structures and the sizes of the samples are as follows: length x width x height= (100-200) × (20-40) × (2/3/4/5) mm.
Further, the specific steps of step 2) are as follows: the structure and the size of the pouring system are designed, and the pouring system comprises a pouring cup with the diameter of phi 40-phi 100mm, a straight pouring gate with the diameter of phi 20-phi 40mm, a pouring gate nest seat with the diameter of SR (15-25) mm and a transverse pouring gate with the cross section of wide multiplied by high multiplied by (10-30) multiplied by (8-20) mm; the pouring cup is communicated with the cross gate through the sprue and the pouring gate nest seat.
Further, the specific steps of step 3) are as follows:
3.1 Sand box structure and size are: rectangular parallelepiped structure, length x width x height (up/down) = (400-500) × (260-400) × (50-150)/(30-60) mm; the pouring system is arranged in the sand box, and a sample is connected with the cross runner;
3.2 Casting process design: mold hardness: more than or equal to 80; casting temperature and speed: the same or slightly higher than the actual production parameters.
Further, the specific steps of step 5) are as follows:
5.1 When the sample casting is complete and the corners are clear, casting production can be carried out on the casting with the wall thickness;
5.2 If the length of the sample casting is less than 1/2 of the model sample, casting production of the casting with the wall thickness is impossible;
5.3 When the sample casting length exceeds 1/2 of the model sample but is not fully filled, or the sample casting length is complete but the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness of the magnesium-lithium alloy sand casting.
Further, the pouring system further comprises a second exhaust hole communicated with the runner.
According to the test method for the minimum wall thickness of the magnesium-lithium alloy sand casting, provided by the invention, the minimum wall thickness is determined for the magnesium-lithium alloy casting design and the casting process design through the design of the sample structure and the dimension, the casting system, the casting structure and the dimension, the casting process, the data analysis and the evaluation principle. It has the following advantages:
1. the invention provides a test and a judgment method for determining the minimum castable wall thickness of a casting during sand casting of a magnesium-lithium alloy, which are particularly useful for judging the minimum castable wall thickness of the magnesium-lithium alloy under conventional production conditions and process parameters.
2. The invention provides a test scheme which is easy to implement, convenient to analyze and capable of drawing conclusions of the minimum wall thickness of castings with different sizes and structures. The magnesium-lithium alloy sand casting obtained by the method can cast minimum wall thickness data, and can well guide the design of the sand magnesium-lithium alloy sand casting and the design of the casting process.
3. The minimum wall thickness test method for the magnesium-lithium alloy sand casting castings is suitable for the magnesium-lithium alloy sand castings with different sizes and structures, provides important parameter basis for the design of the magnesium-lithium alloy sand casting and the design of casting technology, provides relevant parameter ranges, is convenient for adjustment aiming at different product structures, sizes and production conditions, can be popularized and used, and has important significance for the sand casting production of magnesium-lithium alloy.
Drawings
FIG. 1 is a schematic view of a device in which the present invention is not used;
fig. 2 is a cross-sectional view A-A of fig. 1.
The reference numerals are explained as follows:
1. a sand box; 2. a sample mold; 3. a first exhaust hole; 4. a pouring cup; 5. a cross gate; 6. a second exhaust hole; 7. a sprue; 8. and a pouring gate nest seat.
Detailed Description
The invention is described in further detail below in connection with specific examples:
the invention provides a method for testing the minimum casting wall thickness of a magnesium-lithium alloy sand mould, which comprises the following steps of:
1) Designing the structure and the size of a sample;
four samples are designed, and the structures and the sizes of the samples are as follows: length x width x height= (100-200) × (20-40) × (2/3/4/5) mm;
2) Designing the structure and the size of a pouring system;
the structure and the size of the pouring system are designed, and the pouring system comprises a pouring cup with the diameter of phi 40-phi 100mm, a straight pouring gate with the diameter of phi 20-phi 40mm, a pouring gate nest seat with the diameter of SR (15-25) mm and a transverse pouring gate with the cross section of wide multiplied by high multiplied by (10-30) multiplied by (8-20) mm; the pouring cup is communicated with the runner through the sprue and the pouring nest seat, and the pouring system further comprises a second exhaust hole communicated with the runner.
3) Designing a casting process, and a sand box structure and size;
3.1 Sand box structure and size are: rectangular parallelepiped structure, length x width x height (up/down) = (400-500) × (260-400) × (50-150)/(30-60) mm; the pouring system is arranged in the sand box, and a sample is connected with the cross runner;
3.2 Casting process design: mold hardness: more than or equal to 80; casting temperature and speed: the same or slightly higher than the actual production parameters.
4) Pouring to obtain a sample casting;
5) And judging according to the corners of the sample castings and the casting length.
5.1 When the sample casting is complete and the corners are clear, casting production can be carried out on the casting with the wall thickness;
5.2 If the length of the sample casting is less than 1/2 of the model sample, casting production of the casting with the wall thickness is impossible;
5.3 When the sample casting length exceeds 1/2 of the model sample but is not fully filled, or the sample casting length is complete but the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness of the magnesium-lithium alloy sand casting.
Referring to fig. 1 and 2, the device structure of the specific application embodiment of the invention comprises a sand box 1, wherein a pouring system and a plurality of sample molds 2 communicated with the pouring system are arranged in the sand box 1, the sample molds 2 correspond to samples, the pouring system comprises a pouring cup 4, a straight pouring gate 7, a pouring gate nest 8 and a runner 5, the pouring cup 4 is communicated with the runner 5 through the straight pouring gate 7 and the pouring gate nest 8, and the plurality of sample molds 2 are respectively communicated with the runner 5. In the preferred embodiment, the number of sample molds 2 is 4, the sample molds 2 are uniformly distributed on the runner 5, and the length x width x height= (100-200) × (20-40) × (2/3/4/5) mm of the 4 sample molds 2. Each sample mold 2 is provided with a first vent hole 3. The runner 5 is provided with a second vent hole 6.
The sand box size is: length x width x height (up/down) = (400-500) × (260-400) × (50-150)/(30-60) mm.
The casting system comprises the following dimensions: a pouring cup with phi 40-phi 100mm, a sprue with phi 20-phi 40mm, a pouring nest with SR (15-25) mm and a runner with a cross section of wide x high= (10-30) x (8-20) mm.
The test data analysis and judgment principle is as follows: when the sample casting is complete and the corners are clear, casting production can be carried out on the casting with the wall thickness; when the length of the sample casting is less than 1/2 of that of the model sample, casting production of the casting with the wall thickness cannot be performed; when the sample casting length exceeds 1/2 of the model sample but is not fully filled, or the sample casting length is complete but the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness of the magnesium-lithium alloy sand casting.
The following is a specific application example of the present invention.
Example 1
A method for testing minimum castable wall thickness of a magnesium-lithium alloy sand casting comprises the following steps: sample structure and size, casting system, casting structure and size, casting process, data analysis and judgment principle.
The pouring system, the casting mould structure and the casting process are basic contents, and can be properly adjusted according to the technical requirements and parameters in the invention by referring to the actual practice of the enterprise.
The number of the samples is 4, the width is 20mm, the thickness is 2mm, 3mm, 4mm and 5mm respectively, and the lengths of the samples are adjusted according to the size and the structure of the casting. The test sample of this example was 100mm long for small castings. And (3) manufacturing a die by adopting aluminum alloy, wherein the roughness of the working surface of the die is 1.6-3.2.
The casting process comprises the following steps: green sand (strictly controlling moisture), manual molding, sand hardness of more than or equal to 80, manual air hole pricking, and box clamping for fastening upper and lower casting molds; the casting temperature is the same as or slightly higher than the normal production; the casting speed is the same as that of normal production; parameters such as draft angle, fillet and the like are selected according to the requirements of the conventional casting process.
Unpacking and measuring: and pouring the casting mould for 10 minutes, pouring the casting mould, cooling the casting, taking out and measuring the size of the casting.
Data analysis and evaluation principle: measuring the lengths of the castings of the samples with different wall thicknesses, if the castings of the samples with certain thickness are completely molded and the corners are clear, the castings with the wall thicknesses can be cast by using the existing technological parameters; if the casting length of a sample with a certain thickness is less than 50mm, the casting with the wall thickness cannot be cast by the existing technological parameters; if the length of the cast casting cast by a sample with a certain wall thickness is more than 50mm but less than 100mm, or the length of the cast casting cast by the sample reaches 100mm, but the sample is not full in filling, the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness under the prior technological parameters.
Example 2
A method for testing minimum castable wall thickness of a magnesium-lithium alloy sand casting comprises the following steps: sample structure and size, casting system, casting structure and size, casting process, data analysis and judgment principle.
The pouring system, the casting mould structure and the casting process are basic contents, and can be properly adjusted according to the technical requirements and parameters in the invention by referring to the actual practice of the enterprise.
The number of the samples is 4, the width is 30mm, the thickness is 2mm, 3mm, 4mm and 5mm respectively, and the lengths of the samples are adjusted according to the size and the structure of the casting. The length of the sample is 150mm for the medium-sized casting. And (3) manufacturing a die by adopting aluminum alloy, wherein the roughness of the working surface of the die is 1.6-3.2.
The casting process comprises the following steps: green sand (strictly controlling moisture), manual molding, sand hardness not less than 90, manual air hole pricking, and box clamping for fastening upper and lower casting molds. The casting temperature is the same as or slightly higher than the normal production; the casting speed is the same as that of normal production; parameters such as draft angle, fillet and the like are selected according to the requirements of the conventional casting process.
Unpacking and measuring: and pouring the casting mould for 10 minutes, pouring the casting mould, cooling the casting, taking out and measuring the size of the casting.
Data analysis and evaluation principle: measuring the lengths of the castings of the samples with different wall thicknesses, if the castings of the samples with certain thickness are completely molded and the corners are clear, the castings with the wall thicknesses can be cast by using the existing technological parameters; if the casting length of a cast sample with a certain thickness is less than 75mm, the casting with the wall thickness cannot be cast by the existing technological parameters; if the length of the cast casting cast by the sample with a certain wall thickness is more than 75mm but less than 150mm, or the length of the cast casting cast by the sample reaches 150mm, but the sample is not full in filling, the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness under the prior technological parameters.
Example 3
A method for testing minimum castable wall thickness of a magnesium-lithium alloy sand casting comprises the following steps: sample structure and size, casting system, casting structure and size, casting process, data analysis and judgment principle.
The pouring system, the casting mould structure and the casting process are basic contents, and can be properly adjusted according to the technical requirements and parameters in the invention by referring to the actual practice of the enterprise.
The number of the samples is 4, the width is 40mm, the thickness is 2mm, 3mm, 4mm and 5mm respectively, and the lengths of the samples are adjusted according to the size and the structure of the casting. The length of the sample of this example was 200mm for a large casting. And (3) manufacturing a die by adopting aluminum alloy, wherein the roughness of the working surface of the die is 1.6-3.2.
The casting process comprises the following steps: green sand (strictly controlling moisture), machine molding, sand mold hardness not less than 95, hand or machine air hole pricking, and box clamping to fasten the upper and lower casting mold. The casting temperature is the same as or slightly higher than the normal production; the casting speed is the same as that of normal production; parameters such as draft angle, fillet and the like are selected according to the requirements of the conventional casting process.
Unpacking and measuring: and pouring the casting mould for 15 minutes, pouring the casting mould, cooling the casting, taking out and measuring the size of the casting.
Data analysis and evaluation principle: measuring the lengths of samples with different wall thicknesses, if the castings of the samples with certain thickness are completely molded, and the corners of the samples are clear, the castings with the wall thicknesses can be cast by using the existing technological parameters; if the casting length of a sample with a certain thickness is less than 100mm, the casting with the wall thickness cannot be cast by the existing technological parameters; if the length of the cast casting cast by a sample with a certain wall thickness is more than 100mm but less than 200mm, or the length of the cast casting cast by the sample reaches 200mm, but the sample is not full in filling, the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness under the prior technological parameters.
The technical matters not specifically described in the foregoing embodiments are the same as those in the prior art.
The present invention is not limited to the above-described embodiments, and the present invention can be implemented with the above-described advantageous effects.
The above is only a specific embodiment disclosed in the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention should be defined by the claims.
Claims (6)
1. A method for testing the minimum casting wall thickness of a magnesium-lithium alloy sand mould is characterized by comprising the following steps of: the method for testing the minimum casting wall thickness of the magnesium-lithium alloy sand mould comprises the following steps of:
1) Designing the structure and the size of a sample;
2) Designing the structure and the size of a pouring system;
3) Designing a casting process, and a sand box structure and size;
4) Pouring to obtain a sample casting;
5) And judging according to the corners of the sample castings and the casting length.
2. The method for testing the minimum casting wall thickness of the magnesium-lithium alloy sand mould according to claim 1, which is characterized by comprising the following steps of: the specific steps of the step 1) are as follows: four samples are designed, and the structures and the sizes of the samples are as follows: length x width x height= (100-200) × (20-40) × (2/3/4/5) mm.
3. The method for testing the minimum casting wall thickness of the magnesium-lithium alloy sand mould according to claim 2, which is characterized by comprising the following steps of: the specific steps of the step 2) are as follows: the structure and the size of the pouring system are designed, and the pouring system comprises a pouring cup with the diameter of phi 40-phi 100mm, a straight pouring gate with the diameter of phi 20-phi 40mm, a pouring gate nest seat with the diameter of SR (15-25) mm and a transverse pouring gate with the cross section of wide multiplied by high multiplied by (10-30) multiplied by (8-20) mm; the pouring cup is communicated with the cross gate through the sprue and the pouring gate nest seat.
4. A method for testing the minimum casting wall thickness of a magnesium-lithium alloy sand mould according to claim 3, which is characterized in that: the specific steps of the step 3) are as follows:
3.1 Sand box structure and size are: rectangular parallelepiped structure, length x width x height (up/down) = (400-500) × (260-400) × (50-150)/(30-60) mm; the pouring system is arranged in the sand box, and a sample is connected with the cross runner;
3.2 Casting process design: mold hardness: more than or equal to 80; casting temperature and speed: the same or slightly higher than the actual production parameters.
5. The method for testing the minimum casting wall thickness of the magnesium-lithium alloy sand mould according to claim 4, which is characterized by comprising the following steps of: the specific steps of the step 5) are as follows:
5.1 When the sample casting is complete and the corners are clear, casting production can be carried out on the casting with the wall thickness;
5.2 If the length of the sample casting is less than 1/2 of the model sample, casting production of the casting with the wall thickness is impossible;
5.3 When the sample casting length exceeds 1/2 of the model sample but is not fully filled, or the sample casting length is complete but the corners are not clear, the wall thickness is considered to be the minimum castable wall thickness of the magnesium-lithium alloy sand casting.
6. A method for testing the minimum casting wall thickness of a magnesium-lithium alloy sand mould according to any one of claims 3 to 5, wherein the method comprises the following steps: the gating system further includes a second vent in communication with the runner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310118238.3A CN116448032A (en) | 2023-02-15 | 2023-02-15 | Method for testing minimum casting wall thickness of magnesium-lithium alloy sand mould |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310118238.3A CN116448032A (en) | 2023-02-15 | 2023-02-15 | Method for testing minimum casting wall thickness of magnesium-lithium alloy sand mould |
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| CN202310118238.3A Pending CN116448032A (en) | 2023-02-15 | 2023-02-15 | Method for testing minimum casting wall thickness of magnesium-lithium alloy sand mould |
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- 2023-02-15 CN CN202310118238.3A patent/CN116448032A/en active Pending
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