CN110976791A - Self-spinning shunting bag and aluminum alloy casting method - Google Patents
Self-spinning shunting bag and aluminum alloy casting method Download PDFInfo
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- CN110976791A CN110976791A CN201911384395.9A CN201911384395A CN110976791A CN 110976791 A CN110976791 A CN 110976791A CN 201911384395 A CN201911384395 A CN 201911384395A CN 110976791 A CN110976791 A CN 110976791A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/12—Appurtenances, e.g. for sintering, for preventing splashing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a spinning shunting bag and an aluminum alloy casting method, wherein the spinning shunting bag comprises a central part, a shell, a first opening and a second opening, wherein the first opening and the second opening are arranged on the shell, the first opening and the second opening are respectively positioned on the left side and the right side of the shell, the first opening is positioned at the front end or the rear end of the side surface of the shell, and the second opening is positioned at the front end or the rear end of the side surface of the shell, so that liquid alloy flowing out of the shell is spun in a casting mold. According to the self-spinning shunting bag provided by the invention, through the arrangement of the first opening and the second opening, the liquid alloy flowing out along the shell generates a self-spinning effect after contacting the interior of a casting mold, so that the macrosegregation defect of an aluminum alloy cast ingot is improved.
Description
Technical Field
The invention relates to the field of aluminum alloy casting, in particular to a self-spinning shunting bag and an aluminum alloy casting method.
Background
During the solidification process of the aluminum alloy, the solute in the solid-liquid two-phase region is redistributed between the solid phase and the liquid phase due to the chemical potential difference of the solute in the solid phase and the liquid phase, and the solute is unevenly distributed in the ingot (the concentration of the solute is higher or lower relative to the nominal content of the aluminum alloy) under the action of melt convection, namely macrosegregation. Due to the extremely low diffusion rate of the solute in the solid phase, the macro-segregation is difficult to redistribute the solute uniformly in the ingot through the subsequent heat treatment process. The serious macrosegregation defects are inherited to products processed by subsequent ingots, and have very adverse effects on the performance of final products.
In the prior art, the macrosegregation of an ingot is mostly controlled by electromagnetic stirring of a crystallizer. The electromagnetic stirring of the crystallizer generates a magnetic field based on alternating current, the action of the magnetic field generates induced current in the liquid cavity, the induced current generates Lorentz force under the action of the magnetic field, and the melt in the liquid cavity generates a stirring effect under the drive of the Lorentz force, so that the aim of intervening the distribution of solute in the liquid cavity is fulfilled. Obviously, the effect of electromagnetic stirring of the crystallizer on improving the macrosegregation of the cast ingot is very dependent on the installation position of the stirrer. For the existing DC casting tool, in view of the sealing property of the water tank of the crystallizer, it is difficult to additionally install a stirring device on the existing crystallizer on the casting platform. If directly install the agitator crystallizer lower part, because the aluminum alloy casting process, the setting speed is fast, and the liquid cave is shallow, hardly guarantees in the effective active area of liquid cave dropping the agitator, and the stirring effect is difficult to guarantee.
Therefore, how to improve the macrosegregation of the cast ingot and improve the quality of the cast ingot is a technical problem which needs to be solved by the technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a self-spinning shunting bag and an aluminum alloy casting method, which are used for improving the macrosegregation defect of an aluminum alloy cast ingot, and have the advantages of simplicity, practicability, low cost and good effect.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a spin reposition of redundant personnel bag, includes central part, casing and sets up first opening and second opening on the casing, first opening with the second opening is located respectively the left and right sides of casing, just first opening is located the front end or the rear end of casing side, the second opening all is located the front end or the rear end of casing side for the liquid alloy that flows out the casing produces the spin in casting the mould.
Preferably, the housing is square, and the first opening and the second opening are respectively located on two sides of a diagonal line of the housing.
Preferably, the housing is in a zigzag shape, and the first opening and the second opening are respectively located at two ends of the zigzag shape of the housing.
Preferably, the first opening and the second opening are both extension opening parts extending out of a preset length, and the cross section of each extension opening part is square.
An aluminum alloy casting method, which adopts the spinning shunting bag, comprises the following steps:
step S1: determining the geometric structure of the spin shunt bag according to the size specification of the cast ingot;
step S2: determining size parameters of all parts of the spin shunt bag through a numerical simulation technology;
step S3: manufacturing a spin shunt bag according to the geometric structure of the spin shunt bag and the size parameters of each part;
step S4: and casting by adopting the spinning shunting bag to obtain an ingot casting product.
Preferably, the step S3 specifically includes:
and forming the spin shunt bag through thermal coupling according to the geometric structure and the dimensional parameters of all parts of the spin shunt bag.
Preferably, after step S4, the method further includes:
step S5: and checking the macrosegregation condition of the ingot casting product, judging whether the macrosegregation condition of the ingot casting product meets the product requirement, and if not, re-determining the geometric structure and the size parameters of each part of the spinning shunting bag.
Preferably, the ingot in the step S1 is an aluminum alloy DC slab ingot.
The self-spinning shunting bag provided by the invention comprises a central part, a shell, a first opening and a second opening, wherein the first opening and the second opening are arranged on the shell, the first opening and the second opening are respectively positioned on the left side and the right side of the shell, the first opening is positioned at the front end or the rear end of the side surface of the shell, and the second opening is positioned at the front end or the rear end of the side surface of the shell, so that liquid alloy flowing out of the shell can spin in a casting mold. According to the self-spinning shunting bag provided by the invention, through the arrangement of the first opening and the second opening, the liquid alloy flowing out along the shell generates a self-spinning effect after contacting the interior of a casting mold, so that the macrosegregation defect of an aluminum alloy cast ingot is improved.
The invention provides a spinning shunt bag, which comprises the following steps: step S1: determining the geometric structure of the spin shunt bag according to the size specification of the cast ingot; step S2: determining size parameters of all parts of the spin shunt bag through a numerical simulation technology; step S3: manufacturing a spin shunt bag according to the geometric structure of the spin shunt bag and the size parameters of each part; step S4: and casting by adopting the spinning shunting bag to obtain an ingot casting product. The spinning shunting bag provided by the invention is used for driving the melt in the liquid cavity to rotate in the DC casting process of the aluminum alloy flat ingot by designing the spinning shunting bag capable of realizing the spinning of the melt based on the structure, so that the uniformity of the solute distribution in the flat ingot is improved, and the purpose of reducing the macrosegregation degree of the flat ingot is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of one embodiment of a spin shunt bag according to the present invention;
FIG. 2 shows the appearance of a liquid cavity after a spin shunt bag is implemented in the aluminum alloy slab DC casting method provided by the invention;
FIG. 3 shows the melt rotation effect in the liquid cavity after the spin shunt bag is implemented in the aluminum alloy slab DC casting method provided by the invention;
FIG. 4 shows the effect of the spin-shunt bag of the present invention on the rotation of the melt at a cross-section below the liquid level;
FIG. 5 is a flow chart of a method of casting an aluminum alloy provided by the present invention;
wherein: a central part-1, a shell-2, a first opening-3 and a second opening-4.
Detailed Description
The core of the invention is to provide a self-spinning shunting bag and an aluminum alloy casting method, which are used for improving the macrosegregation defect of an aluminum alloy cast ingot, and have the advantages of simplicity, practicability, low cost and good effect.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a spin shunt bag according to an embodiment of the present invention; FIG. 2 shows the appearance of a liquid cavity after a spin shunt bag is implemented in the aluminum alloy slab DC casting method provided by the invention; FIG. 3 shows the melt rotation effect in the liquid cavity after the spin shunt bag is implemented in the aluminum alloy slab DC casting method provided by the invention; FIG. 4 shows the effect of the spin-shunt bag of the present invention on the rotation of the melt at a cross-section below the liquid level; FIG. 5 is a flow chart of a method of casting an aluminum alloy according to the present invention.
In this embodiment, the spin shunt bag comprises a central portion 1 and a shell 2, the central portion 1 is located at the center of the shell 2, the central portion 1 is connected with a submerged nozzle (SEN), and aluminum liquid enters the spin shunt bag from the central portion, namely, the liquid alloy flows into the shell 2 of the spin shunt bag along the central portion 1 and then flows out from an opening.
Furthermore, a first opening 3 and a second opening 4 are arranged on the shell 2, a space for the liquid alloy to spin is formed between the first opening 3 and the casting mold, and a space for the liquid alloy to spin is also formed between the second opening 4 and the casting mold; the first opening 3 and the second opening 4 are respectively positioned at the left side and the right side of the shell 2, namely, the liquid alloy respectively flows out from the left side and the right side of the shell 2, and the liquid alloy flowing out in two directions can realize the self-rotating effect and further improve the mixing effect.
Specifically, the first opening 3 is located at the front or rear end of the side of the shell 2, and the second openings 4 are located at the front or rear end of the side of the shell 2, so that the liquid alloy flowing out of the shell 2 is spun in the casting mold. The above arrangement is to ensure that the liquid alloy has sufficient space to achieve the rotating effect, and the first opening 3 and the second opening 4 are provided at the end of the side of the housing 2.
According to the self-spinning shunting bag provided by the invention, through the arrangement of the first opening 3 and the second opening 4, the liquid alloy flowing out along the shell 2 generates a self-spinning effect after contacting the interior of a casting mold, so that the macrosegregation defect of an aluminum alloy cast ingot is improved.
In addition to the above embodiments, the housing 2 is square, and the first opening 3 and the second opening 4 are respectively located on two sides of a diagonal line of the housing 2, so that the spin directions of the melt on the left and right sides of the housing 2 are opposite.
In addition to the above embodiments, the housing 2 has a zigzag shape, and the first opening 3 and the second opening 4 are located at both ends of the zigzag shape of the housing 2.
On the basis of the above embodiments, the first opening 3 and the second opening 4 are both extended opening portions extending out by a preset length, and the cross section of each extended opening portion is square, that is, the first opening 3 and the second opening 4 both have an extension of a preset length, so that the flow direction of the liquid alloy can be guided, and the melt spinning can be realized.
Besides the spinning shunting bag, the invention also provides an aluminum alloy casting method.
The aluminum alloy casting method comprises the following steps:
step S1: determining the geometric structure of the spin shunt bag according to the size specification of the cast ingot;
step S2: determining size parameters of all parts of the spin shunt bag through a numerical simulation technology, specifically, as shown in fig. 1, the size parameters of all parts comprise sizes a, b, c, d, e and f;
step S3: manufacturing the spin shunt bag according to the geometric structure of the spin shunt bag and the size parameters of each part;
step S4: and (5) casting by adopting a spinning shunting bag to obtain an ingot casting product.
The spinning shunting bag provided by the invention is used for driving the melt in the liquid cavity to rotate in the DC casting process of the aluminum alloy flat ingot by designing the spinning shunting bag capable of realizing the spinning of the melt based on the structure, so that the uniformity of the solute distribution in the flat ingot is improved, and the purpose of reducing the macrosegregation degree of the flat ingot is achieved.
Further, step S3 specifically includes:
according to the geometric structure of the spin shunt bag and the size parameters of each part, the spin shunt bag is formed through thermal coupling, namely, the spin shunt bag is manufactured and formed in a thermal coupling mode.
In addition to the above embodiments, the method further includes, after step S4:
step S5: and (4) detecting the macrosegregation condition of the ingot casting product, judging whether the macrosegregation condition of the ingot casting product meets the product requirement, and if not, re-determining the geometric structure and the size parameters of each part of the spinning shunting bag. The structure and size information of the spin shunt bag can be corrected according to the macrosegregation condition of the cast ingot product, and the macrosegregation problem of the cast ingot can be further improved.
On the basis of the above embodiments, the ingot in step S1 is an aluminum alloy DC slab, that is, the aluminum alloy casting method provided in the present embodiment is mainly used for casting an aluminum alloy DC slab.
The spinning shunting bag and the aluminum alloy casting method provided by the embodiment realize melt spinning based on the structure of the spinning shunting bag based on the generation reason of the macrosegregation of the aluminum alloy slab ingot, so as to improve the macrosegregation defect of the aluminum alloy ingot. Compared with the conventional aluminum alloy DC casting, the self-rotating shunting bag and the aluminum alloy casting method only change the structure of the shunting bag, have low investment, are simple and practical, and are suitable for industrial popularization and use.
The spinning shunting bag and the aluminum alloy casting method provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are merely provided to aid in understanding the aluminum alloy casting method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The self-spinning shunting bag is characterized by comprising a central part (1), a shell (2), and a first opening (3) and a second opening (4) which are arranged on the shell (2), wherein the first opening (3) and the second opening (4) are respectively positioned at the left side and the right side of the shell (2), the first opening (3) is positioned at the front end or the rear end of the side surface of the shell (2), and the second opening (4) is positioned at the front end or the rear end of the side surface of the shell (2), so that liquid alloy flowing out of the shell (2) can spin in a casting die.
2. The spin shunt bag of claim 1, wherein the housing (2) is square, and the first opening (3) and the second opening (4) are located on two diagonal sides of the housing (2).
3. The spin shunt bag according to claim 1, wherein the housing (2) is zigzag-shaped, and the first opening (3) and the second opening (4) are respectively located at two ends of the zigzag-shaped housing (2).
4. A spin shunt bag according to any one of claims 1 to 3, wherein the first opening (3) and the second opening (4) are both extended opening portions extending a predetermined length, and the cross section of the extended opening portions is square.
5. A method of casting an aluminum alloy using the spin-on manifold as defined in any one of claims 1 to 4, comprising the steps of:
step S1: determining the geometric structure of the spin shunt bag according to the size specification of the cast ingot;
step S2: determining size parameters of all parts of the spin shunt bag through a numerical simulation technology;
step S3: manufacturing a spin shunt bag according to the geometric structure of the spin shunt bag and the size parameters of each part;
step S4: and casting by adopting the spinning shunting bag to obtain an ingot casting product.
6. The aluminum alloy casting method as recited in claim 6, wherein the step S3 is specifically:
and forming the spin shunt bag through thermal coupling according to the geometric structure and the dimensional parameters of all parts of the spin shunt bag.
7. The aluminum alloy casting method as recited in claim 5 or 6, further comprising, after the step S4:
step S5: and checking the macrosegregation condition of the ingot casting product, judging whether the macrosegregation condition of the ingot casting product meets the product requirement, and if not, re-determining the geometric structure and the size parameters of each part of the spinning shunting bag.
8. The aluminum alloy casting method as recited in claim 7, wherein the ingot in the step S1 is an aluminum alloy DC slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384395.9A CN110976791A (en) | 2019-12-28 | 2019-12-28 | Self-spinning shunting bag and aluminum alloy casting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384395.9A CN110976791A (en) | 2019-12-28 | 2019-12-28 | Self-spinning shunting bag and aluminum alloy casting method |
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| CN110976791A true CN110976791A (en) | 2020-04-10 |
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| CN208743636U (en) * | 2018-09-13 | 2019-04-16 | 泉州苗亿自动化机械有限公司 | A kind of casting shunting bag |
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2019
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| JPH0570537B2 (en) * | 1988-06-17 | 1993-10-05 | Nippon Steel Corp | |
| US5344478A (en) * | 1993-08-02 | 1994-09-06 | Air Products And Chemicals, Inc. | Vortex dispersing nozzle for liquefied cryogenic inert gases used in blanketing of molten metals exposed to ambient air and method |
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Application publication date: 20200410 |