CN114905006A - Preparation method and preparation system of cast rod - Google Patents
Preparation method and preparation system of cast rod Download PDFInfo
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- CN114905006A CN114905006A CN202110176960.3A CN202110176960A CN114905006A CN 114905006 A CN114905006 A CN 114905006A CN 202110176960 A CN202110176960 A CN 202110176960A CN 114905006 A CN114905006 A CN 114905006A
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- 238000002360 preparation method Methods 0.000 title claims description 22
- 238000005266 casting Methods 0.000 claims abstract description 207
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
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- 238000005260 corrosion Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
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Classifications
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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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
Abstract
It is an object of the present invention to provide a system for preparing a cast rod that solves at least one of the problems of the prior art. Another object of the present invention is to provide a method for manufacturing a cast rod, which can solve at least one aspect of the problems of the prior art. The method for preparing the cast rod for achieving the aim comprises the following steps: providing a mould shell, wherein the mould shell is provided with a casting shell corresponding to a casting system and a casting shell corresponding to a casting, the casting shell is provided with a geometric center, the casting shell comprises a main pouring gate and a branch pouring gate, and the branch pouring gate is used for communicating the main pouring gate with the casting shell, wherein the main pouring gate is configured to be staggered with the geometric center when the mould shell is provided; casting the smelted high-temperature metal into a casting shell through an autonomous pouring channel; cooling to obtain a casting; a plurality of bars are cut and obtained at different locations on the casting.
Description
Technical Field
The invention relates to the field of casting, in particular to a preparation method and a preparation system of a cast rod.
Background
The aeroengine widely adopts cast parts in parts such as a turbine, a combustion chamber, a gas compressor, a mechanical system, a control system and the like, and the cast product has the advantages of two aspects: firstly, the alloy types are complete, and particularly, part of high-strength and difficult-to-deform alloy can only be formed by casting; and secondly, the forming of the parts with complex structures can be realized, the near-net forming is realized, the processing amount is small, the production period is short, and the cost is low.
At the beginning of the design of the casting product, performance data for design needs to be established first and used for calculating the strength of the casting product. Most of castings of the aero-engine are thin-walled complex structures, and most of castings cannot take out standard test bars from a body, so that the mechanical properties of the castings are usually tested by independently casting the test bars (casting bars for short) and adjusting the casting process of the casting bars, so that the microstructure of the casting bars can represent the characteristics of the castings, and then the mechanical properties of the castings are detected after the casting bars are processed, so that the mechanical properties of the castings are reflected.
The characteristics of the casting process determine that different positions on the casting have different solidification speeds due to different temperature fields in the solidification process, so that the microstructure inside the casting is obviously different, such as the grain size, the grain size is related to the solidification speed, the grain size is about small when the solidification speed is higher, and conversely, the grain size is larger when the solidification speed is lower. At present, when the influence of the grain size on the mechanical property is researched, a casting rod with consistent grain size is cast at one time by adopting a mode that the casting rods are uniformly distributed along the circumferential direction and are symmetrically cast, then casting processes such as casting temperature, formwork heat preservation temperature and the like are adjusted, and then casting rods with different grain sizes are cast.
However, the inventors have found that the existing method for preparing the cast rod has the following disadvantages:
1) the grain size cannot be accurately controlled, and because the casting process has high fluctuation, the grain size of the cast rod is difficult to accurately control;
2) only one casting rod with the grain size can be cast at a time, and the production efficiency is low.
Disclosure of Invention
It is an object of the present invention to provide a system for preparing a cast rod that solves at least one of the problems of the prior art.
Another object of the present invention is to provide a method for manufacturing a cast rod, which can solve at least one of the problems of the prior art.
To achieve the foregoing object, a method for producing a cast rod includes the steps of:
providing a formwork, wherein the formwork is provided with a casting shell corresponding to a casting system and a casting shell corresponding to a casting, the casting shell is provided with a geometric center, the casting shell comprises a main pouring gate and a branch pouring gate, the branch pouring gate is used for communicating the main pouring gate with the casting shell, and the main pouring gate and the geometric center are arranged in a staggered manner when the formwork is provided;
casting the smelted high-temperature metal into the casting shell from the main pouring gate;
cooling to obtain a casting;
a plurality of casting bars are cut and obtained at different locations of the casting.
In one or more embodiments, the casting shell is annular, the geometric center is a circle center of the annular shell, and the main pouring gate is arranged eccentrically to the circle center;
wherein the preparation method comprises the following steps:
cooling to obtain an annular casting;
and cutting at different circumferential positions of the annular casting to obtain a plurality of casting bars.
In one or more embodiments, the main runner is provided on an inner peripheral side of the annular housing at a position eccentric from the center of the circle.
In one or more embodiments, the main runner is provided on an outer circumferential side of the annular casing.
In one or more embodiments, the casting shell comprises a first shell and a second shell, the first shell having a larger diameter than the second shell;
the second shell is arranged on the inner peripheral side of the first shell, the main runner is arranged between the first shell and the second shell, the branch runners are respectively communicated with the inner peripheral side wall of the first shell and the outer peripheral side wall of the second shell, and the main runner is arranged at a position eccentric to the circle center of the first shell.
In one or more embodiments, the method of making further comprises:
and adjusting the size difference of the crystal grains of the annular casting at different positions along the circumferential direction by adjusting the distance between the main pouring gate and the circle center.
In one or more embodiments, the method of making further comprises:
the grain size difference of the annular casting at different positions along the circumferential direction is adjusted by adjusting the diameter of the annular shell.
In one or more embodiments, the cross section of the casting shell having a circular ring shape has a trapezoidal shape with a wide top and a narrow bottom.
In one or more embodiments, the step of providing a formwork further comprises:
the mould shell is preheated before casting.
In one or more embodiments, the casting shell further includes a sprue cup disposed at the main runner inlet and a riser disposed on the casting shell.
In one or more embodiments, after the cooling to obtain the casting, the preparation method further comprises:
corroding the surface of the casting;
and detecting the sizes of the crystal grains at different positions of the casting.
To achieve the foregoing and other objects, a system for preparing a casting bar for casting a casting shell having a geometric center includes a main runner and a branch runner communicating the main runner with the casting shell;
wherein the main runner and the branch runners are configured to allow the main runner to be offset from a geometric center of the casting shell.
In one or more embodiments, the preparation system further comprises a tundish disposed at the main runner inlet and a riser disposed on the casting shell.
The advanced effects of the invention comprise one or a combination of the following:
through in this casting system, with the main reasonable distribution who waters with foundry goods casing geometric centre relative position for can obtain the ring shape foundry goods that crystalline grain size uniform gradient distributes through once casting, according to required crystalline grain size, follow relevant position and surely get the mechanical properties test bar, mechanical properties detects after the processing, has promoted the production efficiency to the cast bar. Meanwhile, mechanical property detection is carried out after the casting rods with different crystal grain sizes are processed, and the influence of the crystal grain sizes on the mechanical property is further promoted and researched.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic flow diagram of one embodiment of the present method of making cast bars;
FIG. 2 shows a schematic perspective view of a first embodiment of the present cast bar preparation system;
FIG. 3 is a schematic top view of a first embodiment of the present cast bar preparation system;
FIG. 4 is a schematic cross-sectional view taken along the line A-A in FIG. 3;
FIG. 5 shows a schematic perspective view of a second embodiment of the present cast rod preparation system;
FIG. 6 is a schematic top view of a second embodiment of the present cast bar preparation system;
FIG. 7 is a schematic cross-sectional view taken along the line B-B in FIG. 6;
FIG. 8 shows a schematic perspective view of a third embodiment of the present cast rod preparation system;
FIG. 9 is a schematic top view of a third embodiment of the present cast bar preparation system;
fig. 10 is a schematic sectional view taken along the direction C-C in fig. 9.
Detailed Description
The following discloses a variety of different implementation or examples implementing the subject technology. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present disclosure. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Also, the present application uses specific words to describe embodiments of the application, such as "one embodiment," "an embodiment," and/or "some embodiments" to mean that a particular feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" in various places throughout this specification are not necessarily to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate. The terms "first", "second", and the like are used to define the components, are used only for the convenience of distinguishing the corresponding components, and are not intended to limit the scope of the present application, unless otherwise stated.
It should be noted that, where used, the upper, lower, top, and bottom in the following description are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between various parts of the object.
It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.
To solve at least one aspect of the problems in the prior art, an aspect of the present invention provides a method for manufacturing a cast rod, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method for manufacturing a cast rod, wherein the method for manufacturing a cast rod includes the following steps:
s1: providing a mould shell, and arranging the position of a main pouring gate in the mould shell to be staggered with the geometric center of the casting shell. Specifically, the formwork has a casting shell corresponding to the casting system and a casting shell corresponding to the casting, the casting shell having a geometric center, the casting shell including a main runner and a branch runner, the branch runner communicating the main runner with the casting shell. The form can be prepared by first preparing a mold having a shape conforming to the form to be formed. And pressing a wax mould in the mould and combining the wax mould, wherein the pressed wax mould comprises a part corresponding to the casting shell and a part corresponding to the casting shell, combining the parts together, repeatedly performing multiple operations by adopting the processes of slurry dipping and sand spraying, and then roasting and dewaxing to finally prepare the mould shell.
S2: casting the smelted high-temperature metal into a casting shell through an autonomous pouring channel;
s3: cooling to obtain a casting;
s4: a plurality of bars are cut and obtained at different locations on the casting.
The main pouring gate is arranged at a position staggered with the geometric center of the casting shell, so that an asymmetric temperature field is formed between the casting shell and the casting shell in the molten metal solidification process, and a casting in the casting shell is close to one side of the main pouring gate, so that the temperature is high, the heat dissipation is slow, the cooling speed is slow, and coarse grains are formed; on the contrary, the side far away from the main pouring channel has low temperature, fast heat dissipation and fast cooling speed, and forms fine grains. Therefore, a plurality of casting rods with different grain sizes can be obtained by cutting at different positions of the casting, the problem that the casting rod with one grain size can only be cast at one time in the existing casting process is solved, and the production efficiency of the casting rod is improved. Meanwhile, mechanical property detection is carried out after the casting rods with different grain sizes are processed, so that the influence of the grain sizes on the mechanical property can be further promoted and researched.
To further illustrate the method and system for manufacturing a cast rod according to the present invention, examples 1 to 3 are described below.
FIG. 2 is a schematic perspective view, FIG. 3 is a schematic top view, and FIG. 4 is a schematic cross-sectional view taken along the direction A-A in FIG. 3 of a first embodiment of the present cast rod preparation system. FIG. 5 is a schematic perspective view, FIG. 6 is a schematic top view, and FIG. 7 is a schematic cross-sectional view taken along the direction B-B in FIG. 6 of a second embodiment of the present cast rod preparation system. FIG. 8 is a schematic perspective view, FIG. 9 is a schematic top view, and FIG. 10 is a schematic cross-sectional view of the third embodiment of the present cast rod making system taken along the direction C-C in FIG. 9.
In the cast rod preparation system shown in fig. 2 to 10, the casting shell is annular, and thus the casting obtained by cooling is also annular, and a plurality of cast rods are obtained by cutting at different positions in the circumferential direction of the annular casting. In the circular shell, the geometric center of the shell is the center of the circle, and the main pouring gate is arranged eccentrically to the center of the circle.
It is understood that in other embodiments different from those shown, the casing may be in other suitable shapes, such as rectangular ring, polygonal ring, triangular ring, etc., all without limitation.
First embodiment
As shown in fig. 2 to 4, the formwork 100 employing the first embodiment includes a casting shell 1 corresponding to a casting system and a casting shell 12 corresponding to a casting. The casting shell 1 comprises a main pouring gate 10 and a branch pouring gate 11, the main pouring gate 10 is connected with the casting shell 12 through a plurality of branch pouring gates 11, wherein the casting shell 12 is in a circular ring shape, the main pouring gate 10 is arranged in the inner peripheral side of the circular ring-shaped casting shell 12, the branch pouring gates 11 are communicated with the inner peripheral side of the circular ring-shaped casting shell 12, and the position of the main pouring gate 10 is eccentric with the center of the circular ring-shaped casting shell 12. Wherein, the casting shell also comprises a pouring cup 13 arranged at the inlet of the main pouring gate 10 and a riser 14 arranged on the casting shell 12.
When the mold shell 100 is prepared, an investment casting process is adopted, a mold is firstly prepared, then a wax mold is pressed and combined, slurry dipping and sand pouring are adopted, and after repeated times, roasting and dewaxing are carried out, and finally the mold shell 100 is prepared. Before casting, the mold shell 100 is preheated to 900 ℃ in a heating furnace and is kept warm for 5 hours. The form 100 is then transferred to a casting furnace and evacuated to below 1 Pa. When the cast rod is prepared, the high-temperature alloy K4169 is cast, the K4169 alloy is smelted to 1450 ℃, the high-temperature alloy is cast into the casting shell 12 along the main pouring channel 10 and the branch pouring channel 11 of the pouring cup 13, and the high-temperature alloy is discharged after being cooled.
The casting shell 12 is then cleaned and the main runner 10, branch runners 11 and risers 14 are removed to provide an annular casting, which may be machined. Corroding the surface of the casting with HCl + H 2 O 2 (according to the proportion of 3: 1), the corrosion time is 90 s. The detection shows that the casting is uniformly distributed in a gradient manner from fine grains to coarse grains along the circumferential direction, and the grain size is 2mm to 8 mm. The positions with grain sizes of 2mm, 5mm and 8mm were selected and cut out to obtain 3 cast bars with different grain sizes, and room temperature tensile tests were performed according to ASTM E8/E8M, and the results are shown in Table 1.
| Grain size of cast rod (mm) | Yield strength (MPa) | Tensile strength (MPa) |
| 2 | 950 | 1100 |
| 2 | 960 | 1120 |
| 2 | 945 | 1090 |
| 5 | 920 | 1050 |
| 5 | 915 | 1020 |
| 5 | 930 | 1060 |
| 8 | 880 | 1000 |
| 8 | 865 | 970 |
| 8 | 870 | 990 |
Second embodiment
As shown in fig. 5 to 7, the formwork 200 employing the second embodiment includes a casting housing 2 corresponding to the casting system and a casting housing 22 corresponding to the casting. The casting shell 2 comprises a main pouring gate 20 and a branch pouring gate 21, the main pouring gate 20 is connected with the casting shell 22 through a plurality of branch pouring gates 21, the casting shell 22 is in a circular ring shape, the main pouring gate 20 is arranged on the outer peripheral side of the circular casting shell 22, the branch pouring gates 21 are communicated with the outer peripheral side of the circular casting shell 22, and the position of the main pouring gate 20 is eccentric with the center of the circular casting shell 22. Wherein the casting shell further comprises a pouring cup 23 arranged at the inlet of the main pouring channel 20 and a riser 24 arranged on the casting shell 22.
When the mold shell 200 is prepared, an investment casting process is adopted, a mold is firstly prepared, then a wax mold is pressed and combined, slurry dipping and sand spraying are adopted, and after repeated times, roasting and dewaxing are carried out, and finally the mold shell 200 is prepared. Before casting, the mold shell 200 is preheated to 900 ℃ in a heating furnace and is kept warm for 5 hours. The mold shell 200 is then transferred to a casting furnace and evacuated to below 1 Pa. When the cast rod is prepared, the high-temperature alloy K4169 is cast, the K4169 alloy is smelted to 1450 ℃, the high-temperature alloy is cast into the casting shell 22 from the main pouring channel 20 and the branch pouring channel 21 along the pouring cup 23, and the high-temperature alloy is discharged after being cooled.
The casting shell 22 is then cleaned and the main runner 20, branch runner 21 and risers 24 are removed to provide an annular casting, which may be machined. Corroding the surface of the casting with HCl + H as corrosive liquid 2 O 2 (according to the proportion of 3: 1), the corrosion time is 90 s. The detection shows that the casting is uniformly distributed in a gradient manner from fine grains to coarse grains along the circumferential direction, and the grain size is 1.5mm to 8 mm. The positions of 1.5mm, 5mm and 8mm in grain size were selected and cut out to obtain 3 cast bars having different grain sizes, and room temperature tensile test was performed according to ASTM E8/E8M, and the results are shown in Table 2.
| Grain size (mm) of cast rod | Yield strength (MPa) | Tensile strength (MPa) |
| 1.5 | 970 | 1145 |
| 1.5 | 960 | 1135 |
| 1.5 | 975 | 1150 |
| 5 | 925 | 1040 |
| 5 | 920 | 1010 |
| 5 | 935 | 1030 |
| 8 | 875 | 990 |
| 8 | 855 | 960 |
| 8 | 870 | 990 |
Watch two
Third embodiment
As shown in fig. 8 to 10, the formwork 300 employing the third embodiment includes a casting shell 3 corresponding to the casting system and a casting shell 32 corresponding to the casting. The casting housing 32 includes a first housing 321 and a second housing 322, the first housing 321 having a larger diameter than the second housing 322. The second housing 322 is provided on the inner peripheral side of the first housing 321. The casting shell 3 includes a main runner 30 and a branch runner 31, the main runner 30 is disposed between the first shell 321 and the second shell 322, the branch runner 31 is respectively communicated with an inner peripheral sidewall of the first shell 321 and an outer peripheral sidewall of the second shell 322, and the main runner 30 is located at a position eccentric to a center of the first shell 321. The casting shell 3 further includes a pouring cup 33 disposed at the inlet of the main runner 30 and a riser 34 disposed on the casting shell 32.
When the mold shell 300 is prepared, an investment casting process is adopted, a mold is firstly prepared, then a wax mold is pressed and combined, slurry dipping and sand spraying are adopted, and after repeated times, roasting and dewaxing are carried out, and finally the mold shell 300 is prepared. Before casting, the mold shell 300 is preheated to 900 ℃ in a heating furnace and is kept warm for 5 hours. The form 300 is then transferred to a casting furnace and evacuated to below 1 Pa. When the cast rod is prepared, the high-temperature alloy K4169 is cast, the K4169 alloy is smelted to 1450 ℃, and the high-temperature alloy is cast into the first shell 321 and the second shell 322 from the main pouring gate 30 and the branch pouring gate 31 along the pouring cup 33, cooled and discharged.
The first shell 321 and the second shell 322 are then cleaned, and the main runner 30, the branch runner 31 and the riser 34 are cut off to obtain an annular casting, wherein the cleaning and the cutting off can be in an machining mode. Corroding the surface of the casting with HCl + H as corrosive liquid 2 O 2 (according to the proportion of 3: 1), the corrosion time is 90 s. The detection shows that the casting is uniformly distributed in a gradient manner from fine grains to coarse grains along the circumferential direction, and the grain size is 1mm to 12 mm. The positions of 1mm, 6mm and 12mm in grain size were selected and cut out to obtain 3 cast bars having different grain sizes, and room temperature tensile tests were conducted according to ASTM E8/E8M, and the results are shown in Table 3.
Watch III
The method for producing a cast rod according to any one of the first to third embodiments, further comprising: the size difference of crystal grains at different positions of the cast annular casting along the circumferential direction is adjusted by adjusting the distance between the main pouring gate and the center of the casting shell. As in one particular embodiment, a cast rod having a greater grain size gradient is obtained by increasing the distance between the main runner and the center of the casting shell.
The method for producing a cast rod according to any one of the first to third embodiments, further comprising: the grain size difference of the cast annular casting at different positions along the circumferential direction can be adjusted by adjusting the diameter of the annular casting shell. As in one particular embodiment, a cast rod having a greater grain size gradient is obtained by increasing the diameter size of the annular casting shell.
In the method for producing a cast rod according to any one of the first to third embodiments, the cross section of the annular casting shell has a trapezoidal shape with a wide top and a narrow bottom, and specifically, the cross section is achieved by increasing the taper of the inner and outer side walls of the annular casting, respectively, and preferably, the increased taper is not more than 5 °. The cross section of the casting shell is formed into a trapezoidal structure with a wide upper part and a narrow lower part, so that sequential solidification from bottom to top is formed in the solidification process, feeding is facilitated, and the defect of looseness is avoided.
The method for producing a cast rod according to any one of the first to third embodiments, further comprising: the mold shell is preheated before casting, and if the mold shell is preheated again in a sand embedding box and cast, the cooling speed of the casting can be reduced, and the integral grain size can be increased. In other embodiments, the casting is cooled by tapping the casting after casting is complete, increasing the cooling rate and reducing the overall grain size. In other embodiments, the height of the casting shell can be increased, so that the test bars on the second layer and the third layer can be taken out along the height direction of the casting shell, and the number of the cast bars is doubled and doubled respectively, so as to improve the production efficiency.
The method for producing a cast rod according to any one of the first to third embodiments further includes: and corroding the surface of the casting and detecting the grain sizes of different positions of the casting.
Another aspect of the present invention also provides a system for preparing a cast rod, which may be as described in the first to third embodiments, and includes a main runner and a branch runner, where the main runner and the branch runner are configured to allow the geometric centers of the main runner and the casting shell to be offset, as shown in fig. 2 to 10, and therefore will not be described herein.
The manufacturing method according to one or more embodiments described above is suitable for casting various alloys such as high temperature alloys, stainless steel, titanium alloys, and aluminum alloys.
The cast rod prepared by the preparation method in one or more of the previous embodiments is used for testing the mechanical properties of aeroengine castings.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (13)
1. A preparation method of a cast rod is characterized by comprising the following steps:
providing a formwork, wherein the formwork is provided with a casting shell corresponding to a casting system and a casting shell corresponding to a casting, the casting shell is provided with a geometric center, the casting shell comprises a main pouring gate and a branch pouring gate, the branch pouring gate is used for communicating the main pouring gate with the casting shell, and the main pouring gate and the geometric center are arranged in a staggered manner when the formwork is provided;
casting the smelted high-temperature metal into the casting shell from the main pouring gate;
cooling to obtain a casting;
a plurality of casting bars are cut and obtained at different locations of the casting.
2. The preparation method of the casting rod according to claim 1, wherein the casting shell is annular, the geometric center is the center of the annular shell, and the main pouring gate and the center of the circle are eccentrically arranged;
wherein the preparation method comprises the following steps:
cooling to obtain an annular casting;
and cutting at different positions of the circumferential direction of the annular casting to obtain a plurality of casting rods.
3. The method of preparing a casting bar of claim 2, wherein the main runner is provided at a position eccentric from the center of the circle on an inner peripheral side of the annular housing.
4. A method for producing a cast rod according to claim 2, characterized in that the main runner is provided on an outer peripheral side of the annular casing.
5. A method of preparing a cast rod as claimed in claim 2 wherein the casting shell comprises a first shell and a second shell, the first shell having a larger diameter than the second shell;
the second shell is arranged on the inner peripheral side of the first shell, the main runner is arranged between the first shell and the second shell, the branch runners are respectively communicated with the inner peripheral side wall of the first shell and the outer peripheral side wall of the second shell, and the main runner is arranged at a position eccentric to the circle center of the first shell.
6. A method of making a cast rod according to claim 2 further comprising:
and adjusting the size difference of the crystal grains of the annular casting at different positions along the circumferential direction by adjusting the distance between the main pouring gate and the circle center.
7. A method of making a cast rod according to claim 2, further comprising:
the grain size difference of the annular casting at different positions along the circumferential direction is adjusted by adjusting the diameter of the annular shell.
8. A method for producing a cast rod according to claim 2, wherein the cross section of the casting shell having a ring shape has a trapezoidal shape with a wide top and a narrow bottom.
9. A method of making a cast bar according to claim 1 wherein the step of providing a mold shell further comprises:
the formwork is preheated before casting.
10. The method of preparing a casting bar of claim 1 wherein the casting shell further comprises a sprue cup disposed at the inlet of the main runner and risers disposed on the casting shell.
11. A method of making a cast bar according to claim 1 wherein after said cooling to produce a cast part, said method further comprises:
corroding the surface of the casting;
and detecting the sizes of the crystal grains at different positions of the casting.
12. A system for preparing a casting bar for casting a casting shell having a geometric center, the system comprising a main runner and a branch runner communicating the main runner with the casting shell;
wherein the main runner and the branch runners are configured to allow the main runner to be offset from a geometric center of the casting shell.
13. The system for preparing a casting bar of claim 12 further comprising a sprue cup disposed at the inlet of the main runner and a riser disposed on the casting shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176960.3A CN114905006A (en) | 2021-02-07 | 2021-02-07 | Preparation method and preparation system of cast rod |
Applications Claiming Priority (1)
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