CN115821086A - Stirring method and stirring equipment for aluminum alloy melting manufacturing - Google Patents
Stirring method and stirring equipment for aluminum alloy melting manufacturing Download PDFInfo
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- CN115821086A CN115821086A CN202211503316.3A CN202211503316A CN115821086A CN 115821086 A CN115821086 A CN 115821086A CN 202211503316 A CN202211503316 A CN 202211503316A CN 115821086 A CN115821086 A CN 115821086A
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- 238000003756 stirring Methods 0.000 title claims abstract description 211
- 238000000034 method Methods 0.000 title claims abstract description 62
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 238000002844 melting Methods 0.000 title claims abstract description 31
- 230000008018 melting Effects 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 79
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 43
- 239000010439 graphite Substances 0.000 claims abstract description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000010907 mechanical stirring Methods 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 description 18
- 239000000956 alloy Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 11
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 8
- 229910000881 Cu alloy Inorganic materials 0.000 description 7
- 238000005070 sampling Methods 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a stirring method and stirring equipment for manufacturing aluminum alloy by melting, wherein the stirring method comprises the steps of adding metal raw materials into molten aluminum according to a specific doping amount, stirring at a specific rotating speed by using a mechanical stirring device with at least two graphite stirring rods so as to accelerate the melting of the metal raw materials and accelerate the improvement of the uniformity of components, and monitoring the stirring effect by detecting the central doping amount and the edge doping amount of the molten aluminum and the difference value of the central doping amount and the edge doping amount so as to increase the stirring until the required stirring degree is reached; the stirring method can realize automatic stirring for aluminum alloy manufacturing in a low-cost mode, saves manpower and material resources, consumes time in the process, and can effectively improve the uniformity of each component in molten aluminum liquid.
Description
Technical Field
The invention belongs to the field of alloy manufacturing, and relates to a stirring method and stirring equipment for aluminum alloy melting manufacturing.
Background
An alloy based on aluminum with a certain amount of other alloying elements added is one of light metal materials. Besides the general characteristics of aluminum, aluminum alloy has some special properties of alloy, such as high specific strength, excellent toughness and fatigue resistance, and good heat resistance, wear resistance and corrosion resistance, due to the difference of the types and amounts of alloying elements, so that the aluminum alloy has a wide application prospect in the fields of aviation, aerospace, transportation and the like, and has become a research hotspot in the cross field of materials and aluminum-based composite materials in recent years.
At present, in the existing casting process of aluminum alloy, metal raw materials for alloying need to be added into molten aluminum liquid in a molten state, and then the metal raw materials are melted and uniformly mixed in the aluminum liquid through stirring, but at present, the existing stirring mode mainly adopts manual stirring, for example, when aluminum-copper alloy is manufactured, a stirring rod is often held by a person in the process to stretch into the aluminum liquid for circular stirring, the stirring is performed once at regular intervals, and the metal raw materials are completely melted through multiple times of stirring. When the operator faces high-temperature aluminum liquid, stirring operation needs to face a harsh working environment, the safety risk is high, the randomness of stirring operation is high, the quality of each batch is easy to fluctuate, manual stirring is used, alloy components are not easily dispersed in the aluminum liquid to be uneven, impurities in air easily enter the aluminum liquid due to time consumption of a process increased by multiple stirring processes, in a word, manual stirring is time-consuming and labor-consuming in the process, the stirring uniformity degree is poor, and the influence on a subsequent casting process is caused.
CN105483418B discloses a device and a method for preparing an aluminum-based composite material by high-temperature stirring, wherein the device and the method enable nano-scale ceramic particles and aluminum alloy to be well compounded to obtain a high-strength and high-plasticity composite material; firstly, melting pure aluminum, adding zinc particles, magnesium particles and copper wires for alloying to obtain an aluminum alloy melt, raising the temperature of the aluminum alloy melt to 950 ℃, then opening an air blower and a motor controller, introducing air into the aluminum alloy melt, stirring by a rotating blade, cooling the aluminum alloy melt to 720 ℃ after stirring, refining by zinc chloride, and finally casting to obtain the aluminum-based composite material;
CN100424205C discloses a method and a device for stirring an aluminum-based alloy liquid, wherein the aluminum-based alloy liquid is stirred by combining conventional rotary electromagnetic stirring with a graphite crucible with straight blades on the inner wall, the aluminum-based alloy liquid is circumferentially moved by the conventional rotary electromagnetic stirring, the aluminum-based alloy liquid on the periphery is continuously moved to the inside and the aluminum-based alloy liquid on the lower part is moved to the upper part by the straight blades on the inner wall of the graphite crucible, so as to prevent the downward precipitation and centrifugal segregation movement of heavy metal liquid drops, obtain the aluminum-based alloy liquid with uniformly distributed insoluble heavy metal component liquid drops, and solve the technical problem of 'generating the segregation of insoluble heavy metal components' in the existing stirring method;
according to the technical scheme, the aluminum liquid is stirred more uniformly, but equipment is required to be complex respectively, so that a technology and a method which are simple in structure and easy to use need to be developed, the manufacturing process and time of aluminum alloy melting are reduced, and the uniformity degree of components can be effectively improved.
Disclosure of Invention
In view of the problems in the prior art, the present invention aims to provide a stirring method and a stirring device for manufacturing an aluminum alloy by melting, wherein the stirring method comprises the steps of adding a metal raw material into a molten aluminum liquid according to a specific doping amount, stirring at a specific rotation speed by using a mechanical stirring device with at least two graphite stirring rods so as to accelerate the melting of the metal raw material and accelerate the improvement of the uniformity of components, and monitoring the stirring effect by detecting the central doping amount and the edge doping amount of the molten aluminum liquid and the difference value of the two doping amounts so as to increase the stirring until the required stirring degree is reached; the stirring method can realize automatic stirring for aluminum alloy manufacturing in a low-cost mode, saves manpower and material resources, consumes time in the process, and can effectively improve the uniformity of each component in molten aluminum liquid.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a stirring method for the melt fabrication of an aluminium alloy, the stirring method comprising the steps of:
(1) Adding metal raw materials into the molten aluminum according to a specific doping amount;
(2) A mechanical stirring device with at least two graphite stirring rods is used for stirring the molten aluminum liquid in the step (1), the stirring speed is set to be 50-65 rpm, and the stirring time is 55-70 min;
(3) After stirring, standing the molten aluminum liquid, detecting the central doping amount and the edge doping amount of the molten aluminum liquid, calculating the difference value of the central doping amount and the edge doping amount, and finishing the stirring process if the central doping amount and the edge doping amount are within the allowable error range; if at least one data is not within the allowable error range, repeating the steps (2) and (3).
According to the stirring method, metal raw materials are added into molten aluminum according to a specific doping amount, a mechanical stirring device with at least two graphite stirring rods is used for stirring at a specific rotating speed so as to accelerate the melting of the metal raw materials and accelerate the improvement of the uniformity of components, and the stirring effect is monitored by detecting the central doping amount and the edge doping amount of the molten aluminum and the difference value of the central doping amount and the edge doping amount so as to increase the stirring until the required stirring degree is reached; the stirring method can realize automatic stirring for aluminum alloy manufacturing in a low-cost mode, saves manpower and material resources, consumes time in the process, and can effectively improve the uniformity of each component in molten aluminum liquid.
When the aluminum alloy is manufactured in a melting mode, the specific stirring rotating speed for stirring by using the mechanical stirring device with at least two graphite stirring rods is limited, when the rotating speed is too high, the graphite stirring rods are abraded greatly, the graphite stirring rods are easily broken, aluminum liquid is splashed, danger is caused, and the stirring quality is influenced; maintaining the stirring speed at 50-65 rpm, preferably 60rpm, and under proper stirring time, fully melting the metal raw materials and making all components in the aluminum liquid more uniform; the stirring time should be matched with the stirring speed, when the stirring speed is within a lower range, the stirring time should be properly prolonged, and if the stirring speed or the stirring time is reduced unilaterally, the melting of metal raw materials and the uniformity of components in the aluminum liquid at different positions are influenced.
In step (2) of the stirring method of the present invention, the stirring speed is 50 to 65rpm, for example, 50rpm, 51rpm, 52rpm, 53rpm, 54rpm, 55rpm, 56rpm, 57rpm, 58rpm, 59rpm, 60rpm, 61rpm, 62rpm, 63rpm, 64rpm or 65rpm, and the stirring time is 50 to 70min, for example, 50min, 51min, 52min, 53min, 54min, 55min, 56min, 57min, 58min, 59min, 60min, 61min, 62min, 63min, 64min, 65min, 66min, 67min, 68min, 69min or 70min, but is not limited to the recited values, and other values not recited in the above range of values are also applicable.
The following technical solutions are preferred technical solutions of the present invention, but not limited to the technical solutions provided by the present invention, and technical objects and advantageous effects of the present invention can be better achieved and achieved by the following technical solutions.
As a preferable technical scheme of the invention, the metal raw material in the step (1) comprises copper.
Preferably, the doping amount in step (1) is 1 to 3wt%, such as 1wt%, 1.2wt%, 1.4wt%, 1.6wt%, 1.8wt%, 2wt%, 2.2wt%, 2.4wt%, 2.6wt%, 2.8wt%, or 3wt%, etc., but is not limited to the recited values, and other unrecited values within the above-mentioned range of values are also applicable.
As a preferable embodiment of the present invention, the molten aluminum in the step (1) is produced in a crucible of a melting furnace, and the volume of the crucible is 300 to 400L, for example, 300L, 310L, 320L, 330L, 340L, 350L, 360L, 370L, 380L, 390L, or 400L, but the volume is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
As a preferable technical scheme of the invention, the mechanical stirring device in the step (2) is a rotating motor with two graphite stirring rods.
In a preferred embodiment of the present invention, in the step (2), the graphite stirring rod is extended into the molten aluminum until the distance between the graphite stirring rod and the bottommost portion of the molten aluminum is 10 to 20cm, and stirring is started, for example, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm, or 20cm, but the present invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
As a preferred technical solution of the present invention, the center doping amount and the edge doping amount in step (3) are sampled at the same level.
In order to facilitate sampling, the sampling position of the central doping amount can be selected at the most central position of the upper part of the aluminum liquid, and the sampling position of the edge doping amount can be selected at the position of the upper part of the aluminum liquid close to the edge of the container, but preferably the central doping amount and the sampling position of the edge doping amount are kept at the same horizontal height, and on the basis, a person skilled in the art can adjust the sampling position according to actual needs.
In a preferred embodiment of the present invention, when the doping amount is 1wt%, the allowable error ranges of the center doping amount and the edge doping amount are within ± 0.1wt%, for example, 0.1wt%, -0.08wt%, -0.06wt%, -0.04wt%, -0.02wt%, 0wt%, 0.02wt%, 0.04wt%, 0.06wt%, 0.08wt%, or 0.1wt%, but not limited to the values listed, and other values not listed in the above-mentioned value ranges are also applicable.
When the allowable error between the center doping amount and the edge doping amount is 0wt%, that is, there is no error, and the measured value is equal to the target doping amount.
Preferably, when the doping amount is 1wt%, the allowable error range of the difference between the center doping amount and the edge doping amount is within ± 0.05wt%, such as-0.05 wt%, -0.04wt%, -0.03wt%, -0.02wt%, -0.01wt%, 0wt%, 0.01wt%, 0.02wt%, 0.03wt%, 0.04wt%, or 0.05wt%, but not limited to the enumerated values, and other unrecited values within the above numerical range are also applicable.
When the allowable error of the difference between the center doping amount and the edge doping amount is 0wt%, that is, there is no error, the measured center doping amount is equal to the measured edge doping amount.
In a second aspect, the invention provides stirring equipment for manufacturing aluminum alloy by melting, which comprises a rotating motor and at least two graphite stirring rods arranged on the rotating motor; the graphite stirring rod is arranged around the central axis of the rotating motor.
In a preferred embodiment of the present invention, the length of the graphite stirring rod is 100% to 120% of the depth of the molten aluminum, for example, 100%, 105%, 110%, 115%, or 120%, but the length is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, the graphite stirring rod is a graphite stirring plate.
Preferably, the graphite stirring plate has a width of 10 to 20cm, for example, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm or 20cm, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
As a preferable technical scheme of the invention, the rotating motor is electrically connected with a timer and is used for automatically controlling the stirring time.
Preferably, a hook is provided at the top of the rotating motor for moving the rotating motor.
Preferably, the rotating motor is provided with a support frame for supporting the rotating motor above the molten aluminum.
Compared with the prior art, the invention at least has the following beneficial effects:
the stirring method saves manpower and material resources, is convenient for realizing the automatic stirring process in the melting and manufacturing of the aluminum alloy, can ensure the complete melting of metal raw materials by monitoring the stirring effect, and can effectively improve the uniformity of each component in the molten aluminum liquid; the stirring method has the advantages of low cost, high safety and good stirring effect, and is suitable for large-scale use in factories.
Drawings
FIG. 1 is a schematic view of a stirring apparatus for melt fabrication of an aluminum alloy according to example 1 of the present invention;
in the figure: 1-rotating motor, 11-turntable, 2-graphite stirring rod, 3-timer, 4-hook, 5-support frame, 6-smelting furnace, 7-crucible and 8-molten aluminum liquid.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitation of the present invention.
Example 1
The embodiment provides a stirring device for aluminum alloy melting manufacturing, the schematic diagram of the stirring device is shown in the figure, and the following can be seen from the figure:
the stirring equipment comprises a rotating motor 1 and two graphite stirring rods 2 arranged on a turntable 11 of the rotating motor 1; the graphite stirring rod 2 is arranged around the central axis of the rotating motor 1; the length of the graphite stirring rod 2 is 100 percent of the depth of the molten aluminum liquid 8; the rotating motor 1 is electrically connected with a timer 3 and is used for automatically controlling the stirring time; the top of the rotating motor 1 is provided with a hook 4 for moving the rotating motor; the rotary motor 1 is provided with a support frame 5 for supporting the rotary motor 1 above a smelting furnace 6, and the graphite stirring rod 2 extends into molten aluminum 8 in a crucible 7 of the smelting furnace 6.
Example 2
The embodiment provides stirring equipment for manufacturing aluminum alloy through melting, which comprises a rotating motor and three graphite stirring plates arranged on a turntable of the rotating motor; the width of the graphite stirring plate is 15cm; the length of the graphite stirring plate is 120% of the depth of the molten aluminum liquid; the graphite stirring plate is arranged around the central axis of the rotating motor, and the width of the graphite stirring plate is parallel to the radial direction of the turntable; the rotating motor is electrically connected with a timer and is used for automatically controlling the stirring time; the top of the rotating motor is provided with a hook for moving the rotating motor; the rotary motor is provided with a support frame for supporting the rotary motor above the smelting furnace, and the graphite stirring plate extends into molten aluminum in a crucible of the smelting furnace.
Application example 1
The application example provides a stirring method for aluminum alloy melting manufacturing, which is particularly used for manufacturing an aluminum-copper alloy, wherein the target doping amount of copper in the aluminum-copper alloy is 1wt%, the stirring method uses the stirring equipment provided by the embodiment 1, and the stirring method comprises the following steps:
(1) Adding copper into molten aluminum in a crucible of a smelting furnace according to the doping amount of 1 wt%;
(2) Extending a graphite stirring rod of the stirring equipment in the embodiment 1 into the molten aluminum in the step (1), enabling the distance between the tail end of the graphite stirring rod and the bottom of the crucible to be 15cm, setting the stirring speed to be 60rpm, and stirring for 60min, and starting stirring;
(3) And after stirring, standing the molten aluminum liquid for 30min, detecting the central doping amount and the edge doping amount of the molten aluminum liquid, and calculating the difference value of the central doping amount and the edge doping amount, wherein the obtained results are listed in Table 1.
Application example 2
The application example provides a stirring method for aluminum alloy melting manufacturing, and the stirring method is completely the same as the application example 1 except that the stirring time is adjusted from 60min to 50min in the step (2).
Application example 3
The application example provides a stirring method for aluminum alloy melt production, and the stirring method is completely the same as the application example 1 except that the stirring time is adjusted from 60min to 70min in the step (2).
Application example 4
The present application example provides a stirring method for melt production of an aluminum alloy, which is identical to application example 1 except that the stirring speed is adjusted from 60rpm to 50rpm in step (2).
Application example 5
The present application example provides a stirring method for melt production of an aluminum alloy, which is completely the same as application example 1 except that the stirring speed is adjusted from 60rpm to 50rpm and the stirring time is adjusted from 60min to 70min in step (2).
Application example 6
The application example provides a stirring method for manufacturing an aluminum alloy by melting, and is particularly used for manufacturing an aluminum-copper alloy, the target doping amount of copper in the aluminum-copper alloy is 3wt%, the stirring method uses the stirring equipment provided by the embodiment 1, and the stirring method comprises the following steps:
(1) Adding copper into molten aluminum in a crucible of a smelting furnace according to the doping amount of 3 wt%;
(2) Extending a graphite stirring plate of the stirring equipment in the embodiment 2 into the molten aluminum in the step (1), enabling the distance between the tail end of a graphite stirring rod and the bottom of a crucible to be 10cm, setting the stirring speed to be 65rpm, and stirring for 60min, and starting stirring;
(3) After stirring, standing the molten aluminum liquid for 40min, detecting the central doping amount and the edge doping amount of the molten aluminum liquid, calculating the difference value of the central doping amount and the edge doping amount, and finishing the stirring process if the central doping amount and the edge doping amount are within the allowable error range; if at least one data is not in the allowable error range, repeating the steps (2) and (3) until the central doping amount, the edge doping amount and the difference value between the central doping amount and the edge doping amount are in the allowable error range, and completing stirring; the data results of this procedure are reported in table 2.
Application comparative example 1
The present application comparative example provides a stirring method for melt production of an aluminum alloy, which is identical to application example 1 except that the stirring time is adjusted from 60min to 40min in step (2).
Comparative application example 2
The present application comparative example provides a stirring method for melt production of an aluminum alloy, which is identical to application example 1 except that the stirring time is adjusted from 60min to 80min in step (2).
Comparative application example 3
The comparative example of the present application provides a stirring method for melt production of an aluminum alloy, which is identical to application example 1 except that the stirring speed in step (2) was adjusted from 60rpm to 40rpm
Application comparative example 4
The present comparative application example provides a stirring method for melt production of an aluminum alloy, which is identical to application example 1 except that the stirring speed was adjusted from 60rpm to 75rpm in step (2).
Comparative application example 5
The application comparative example provides a stirring method for aluminum alloy melting manufacturing, particularly for manufacturing of aluminum-copper alloy, the target doping amount of copper in the aluminum-copper alloy is 1wt%, the stirring method is manually stirred, and the stirring method comprises the following steps:
(1) Adding copper into molten aluminum in a crucible of a smelting furnace according to the doping amount of 1 wt%;
(2) An operator holds a stirring rod by hand and extends into the molten aluminum liquid to stir in a winding mode, the stirring is carried out once every 30min, each stirring is carried out for 15min, the stirring is carried out for three times totally until all the added copper is melted, and the stirring process takes 105min;
(3) And after stirring, standing the molten aluminum liquid for 30min, detecting the central doping amount and the edge doping amount of the molten aluminum liquid, and calculating the difference value of the central doping amount and the edge doping amount, wherein the obtained results are listed in Table 1.
TABLE 1
TABLE 2
Note: the "difference (wt%)" in tables 1 and 2 represents a difference between the center doping amount and the edge doping amount; the stirring rotation speed of comparative example 5 applied in Table 1 is "-" representing the unspecific rotation speed at the time of manual stirring.
As can be seen from table 1: when stirring equipment is used for stirring aluminum-copper molten aluminum with the doping amount of 1wt%, when the stirring speed is less than 60rpm and the stirring time is less than 60min, the content of alloy components in the aluminum liquid is increased along with the increase of one of the alloy components, but the content is less than the proportion amount, when the stirring speed is 60rpm and the stirring time is 60min, the alloy components in the aluminum liquid reach the required value, on the basis, the stirring speed or the stirring time is increased, the alloy components basically have no obvious change, in addition, the stirring speed is reduced, and the stirring time required for completely melting the alloy components in the aluminum liquid is increased; compared with manual stirring, the time spent on melting alloy components in the aluminum liquid is reduced by using stirring equipment, and the difference between the doping amount of the alloy in the center of the aluminum liquid and the doping amount at the edge of the aluminum liquid is also reduced;
as can be seen from table 2: under the same parameter setting, the stirring equipment is used for setting the doping amount of 3wt% of aluminum-copper molten aluminum liquid to be stirred for multiple times, and the difference value of the doping amount of the alloy components in the center and the doping amount at the edge of the aluminum liquid is within the error range.
From the above, the stirring method provided by the invention can realize automatic stirring for aluminum alloy manufacturing in a low-cost manner, save manpower and material resources and process time, and can effectively improve the uniformity of each component in molten aluminum.
The present invention is described in detail with reference to the above embodiments, but the present invention is not limited to the above detailed structural features, that is, the present invention is not meant to be implemented only by relying on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention can be made, and the same should be considered as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (10)
1. A stirring method for manufacturing an aluminum alloy by melting is characterized by comprising the following steps:
(1) Adding metal raw materials into the molten aluminum according to a specific doping amount;
(2) A mechanical stirring device with at least two graphite stirring rods is used for stirring the molten aluminum liquid in the step (1), the stirring speed is set to be 50-65 rpm, and the stirring time is set to be 50-70 min;
(3) After stirring, standing the molten aluminum liquid, detecting the central doping amount and the edge doping amount of the molten aluminum liquid, calculating the difference value of the central doping amount and the edge doping amount, and finishing the stirring process if the central doping amount and the edge doping amount are within the allowable error range; if at least one data is not within the allowable error range, repeating the steps (2) and (3).
2. The stirring method for melt fabrication of aluminum alloy according to claim 1, wherein the metal raw material of step (1) comprises copper;
preferably, the doping amount in the step (1) is 1 to 3wt%.
3. The stirring method for the molten production of aluminum alloy according to claim 1 or 2, wherein the molten aluminum in the step (1) is produced in a crucible of a melting furnace, and the volume of the crucible is 300 to 400L.
4. The stirring method for the melt fabrication of aluminum alloy according to any one of claims 1 to 3, wherein the mechanical stirring device of step (2) is a rotating motor with two graphite stirring rods.
5. The stirring method for the melting production of aluminum alloy according to any one of claims 1 to 4, wherein in the step (2), the graphite stirring rod is extended into the molten aluminum until the distance between the graphite stirring rod and the bottommost part of the molten aluminum is 10-20 cm, and stirring is started.
6. The stirring method for the melt fabrication of aluminum alloy according to any one of claims 1 to 5, wherein the center doping amount and the edge doping amount of step (3) are sampled at the same level.
7. The stirring method for melt fabrication of an aluminum alloy according to any one of claims 1 to 6, wherein when the doping amount is 1wt%, the allowable error ranges of the center doping amount and the edge doping amount are within ± 0.1 wt%;
preferably, when the doping amount is 1wt%, the allowable error range of the difference between the center doping amount and the edge doping amount is ± 0.05wt% and less.
8. The stirring equipment for manufacturing the aluminum alloy through melting is characterized by comprising a rotating motor and at least two graphite stirring rods arranged on the rotating motor; the graphite stirring rod is arranged around the central axis of the rotating motor.
9. The stirring equipment for melting and manufacturing the aluminum alloy according to claim 8, wherein the length of the graphite stirring rod is 100-120% of the depth of the molten aluminum;
preferably, the graphite stirring rod is a graphite stirring plate;
preferably, the width of the graphite stirring plate is 10-20 cm.
10. The stirring equipment for the melting and manufacturing of the aluminum alloy according to claim 8 or 9, wherein the rotating motor is electrically connected with a timer for automatically controlling the stirring time;
preferably, a hook is arranged at the top of the rotating motor and used for moving the rotating motor;
preferably, the rotating motor is provided with a support frame for supporting the rotating motor above the molten aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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