CN117328000A - Preparation method of aluminum and aluminum alloy refiner - Google Patents
Preparation method of aluminum and aluminum alloy refiner Download PDFInfo
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- CN117328000A CN117328000A CN202311238419.6A CN202311238419A CN117328000A CN 117328000 A CN117328000 A CN 117328000A CN 202311238419 A CN202311238419 A CN 202311238419A CN 117328000 A CN117328000 A CN 117328000A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 59
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 23
- 230000000903 blocking effect Effects 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 28
- 239000000956 alloy Substances 0.000 abstract description 28
- 239000002245 particle Substances 0.000 abstract description 17
- 238000007670 refining Methods 0.000 abstract description 17
- 239000012535 impurity Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- -1 aluminum titanium boron Chemical compound 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008520 organization Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 36
- 238000005266 casting Methods 0.000 description 12
- 238000005096 rolling process Methods 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000007872 degassing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910033181 TiB2 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of metal processing, and provides a preparation method of an aluminum and aluminum alloy refiner. The method is used for solving the problems of low refining efficiency and unstable product performance of the existing aluminum and aluminum alloy refiner. The invention processes the refiner alloy wire through large-angle deformation, not only can effectively eliminate the existence of refiner particles in a cluster form and ensure that the effective particles in the refiner are uniformly dispersed in a matrix, thereby obviously improving the refining efficiency of the refiner, but also can crush impurities in the refiner alloy, reduce the size and improve the dispersibility of the impurities in the matrix, thereby reducing the harmfulness of the impurities and improving the quality standard of the refiner. The technology has the advantages of simple process, low cost, strong universality, high refining efficiency, stable organization and the like. The method is suitable for not only conventional aluminum titanium boron refiners, but also aluminum titanium carbon, aluminum niobium boron and other alloy refiners.
Description
Technical Field
The invention relates to the technical field of metal processing, in particular to a preparation method of an aluminum and aluminum alloy refiner.
Background
Grain refinement is one of the important means for improving the strength and toughness of aluminum and aluminum alloys, and has become an indispensable important process in the modern aluminum processing industry. The grain refiner is the most widely used method in industry, and plays a great promoting role in improving the production efficiency and the product quality and promoting the development of the aluminum processing industry. In summary, the role of the aluminum grain refiner is as follows: (1) improving the strength and toughness of the aluminum alloy. The smaller the grain size of the aluminum alloy, the higher the strength and the better the toughness. The high strength is because the grains are fine, the more grains are per unit area, the larger the total area of the grain boundary is, and the more grains are oriented around each grain; the toughness is good because the unit volume of grains is more, deformation can occur in more grains, and the deformation is relatively uniform, so that stress concentration is reduced, and the metal cannot be broken even if subjected to large plastic deformation. Among the methods of metal strengthening, grain refinement is therefore the only effective method to enhance strength and toughness, while other methods generally reduce toughness while increasing strength. (2) eliminating columnar crystal and feather-like crystal structures. (3) Reducing the internal shrinkage cavity, shrinkage porosity, air holes, hot cracks and segregation tendency and improving the internal quality of the aluminum product. (4) The ductility of the aluminum product is improved, greater flexibility is brought to plastic deformation in the subsequent processing of casting, and surface defects in the processing process are reduced. (5) In the process of rolling the aluminum profile, the rolling speed and the productivity can be improved on the premise of ensuring the product quality, and the service lives of the rolling die and auxiliary equipment can be prolonged. (6) The surface treatment process of the aluminum product is improved, and the surface quality is improved.
The grain refiner generally exists in the form of an aluminum alloy and acts by feeding aluminum as a carrier into the molten aluminum bath. Therefore, the aluminum grain refiner belongs to an aluminum intermediate alloy, is positioned at the middle stream of an industrial chain, and the upstream raw materials mainly comprise aluminum ingots and fluoride salts; the downstream is mainly aluminum materials obtained by various processing modes such as extrusion, flat rolling, forging and the like, such as aluminum plates, aluminum strips, aluminum foils, aluminum profiles and the like.
From the beginning of the 20 th century, aluminum and aluminum alloy grain refiners consisted of salt solvents of elements Ti, B, nb, zr. The 1960 s English man first uses Al-5Ti-1B for refining aluminum and aluminum alloy, and the addition of the Al-Ti-B alloy can basically solve the defects of feather-like crystals, cracks, segregation and the like in aluminum alloy cast ingots, thereby being the most widely applied refiner at present. On the basis, the refiner of Al-5Ti-0.2B, al-3Ti-1B, al-3Ti-3B and the like are also industrially applied. Meanwhile, since the discovery of TiC capable of effectively refining grains by a plug Bo La (Cibula) in 1949, al-Ti-C master alloy grain refiner containing TiC grains has also been developed and used in industry. In addition, intermediate alloys containing Nb and rare earth element-modified Al-Ti-B and Al-Ti-C alloys are also industrially used to varying degrees.
Currently, aluminum refiners are manufactured by adding various salts and other additional materials to an aluminum melt for high temperature reaction, then slagging off to remove impurities, then casting to solid the melt, and then rolling or extruding into wire products for industrial use. Because of the nature of the casting process, the effective particles (such as TiB2 or TiC) in the aluminium refiner are pushed to the grain boundaries during solidification, and although subsequent rolling or extrusion can disperse these particles to some extent in the length direction, the particles in the refiner as a whole are still clustered. The clustered particles are easy to gather and precipitate in the aluminum alloy casting process, and the refining capacity and the refining efficiency are reduced, so that the adding amount of the refiner needs to be increased, and unnecessary waste is caused. In addition, when used for deforming aluminum alloys, the particle clusters scratch the product surface during the subsequent rolling process, causing waste products. Therefore, in the high-quality refiner, the clusters of particles are required to be small, and preferably the particle monomers are uniformly dispersed in the aluminum matrix, so that the refining efficiency can be improved, the adding amount of the refiner can be reduced, and the problems of slag and the like caused by excessive refiner can be solved. On the other hand, since salts produce a large amount of slag at high temperature, the specific gravity of the slag is close to that of the aluminum melt, and it is difficult to clean the slag in the melt during the production process. These slag may enter the ingot during the subsequent casting process as inclusions. These inclusions can continue to form defects in the casting, particularly in the case of wrought alloys, product surface defects during rolling and the like. Therefore, there is a strict regulation on the size of inclusions in the standard of aluminum refiners. Reducing the size of inclusions in the refiner is important to improve product grade. In summary, a key technique for producing high quality refiners is to disperse and homogenize the effective particles therein with few and small inclusions, thereby improving refining efficiency and reducing costs.
Disclosure of Invention
The invention aims to provide a preparation method of an aluminum and aluminum alloy refiner, which solves the problems of low refining efficiency and unstable product performance of the existing aluminum alloy refiner. The specific method is to further process the existing refiner, and the product with excellent performance is produced by adopting a mechanized, automatic, low-cost and easy-to-industrialize method.
The technical scheme of the invention is as follows: the preparation method of aluminum and aluminum alloy refiner improves the existing aluminum and aluminum alloy refiner based on a preparation device of aluminum and aluminum alloy refiner; the preparation device of the aluminum and aluminum alloy refiner comprises a pressing wheel 2, a feeding wheel 3, a feeding shoe 5, a trough 7 and a blocking block 8; the circumferential side of the feeding wheel 3 is provided with a trough 7, and the pinch roller 2 is tangentially arranged with the feeding wheel 3; the feeding wheel 3 is a driving wheel, and the pressing wheel 2 is a driven wheel; the feeding shoe 5 is fixed on the outer side of the feeding wheel 3, one end of the feeding shoe is externally fixed with a blocking block 8, and the blocking block 8 is positioned in the horizontal tangential direction of the trough 7; the material cavity die 9 is arranged on one side of the feeding wheel 3, and forms a cylindrical space with an inlet and an outlet together with the blocking block 8, the material groove 7 and the feeding shoe 5, so as to ensure that the material flowing out of the material groove 7 and the blocking block 8 enters the material cavity die 9; the outer side of the material cavity die 9 is fixed with a product die 11;
the raw material wire 1 is led into the feeding wheel 3, under the co-rotation action of the pressing wheel 2 and the feeding wheel 3, the raw material wire 1 enters the trough 7 and forms relative motion with the feeding shoe 5, and the block 8 arranged on the horizontal tangential direction of the trough 7 changes the flow direction of the raw material wire 1; the raw material wire 1 is deformed and then enters a material cavity die 9 for homogenizing and tempering, the temperature is regulated to be within the range of 200-400 ℃, and the finished wire 14 is obtained through a product die 11.
The cavity die 9 is equipped with a heating system or a cooling system.
The central angle between the blocking block 8 and the tangent point of the pinch roller 2 and the feeding wheel 3 is 90 degrees.
The diameter of the feeding wheel 3 is larger than that of the pressing wheel 2.
The feeding shoe 5 is provided with a wear-resistant lining 6 on the feeding wheel 3 side.
The preparation device of the aluminum and aluminum alloy refiner is used for carrying out single or multiple processing on the raw material wire 1; the processing times are not more than 5 times.
The number of processing times is not more than 3.
The invention has the beneficial effects that: the alloy refiner wire obtained by the preparation method provided by the invention has the advantages that the section of the wire is unchanged, but under the action of large deformation, the original primary aluminum phase is obviously refined, meanwhile, the original refiner particle clusters in the alloy are crushed, the effective particle phase is dispersed, and a large number of particles are extruded into the primary aluminum phase, so that the dispersed and uniform effective particles are formed. In addition, the original impurities in the alloy refiner wire are crushed to form fine particles, and the fine particles are dispersed in the refiner alloy wire, so that the quality of the refiner product can be improved.
Drawings
FIG. 1 is a schematic diagram of an apparatus for producing an aluminum alloy refiner according to the present invention.
FIG. 2 (a) is a microstructure of a prior art Al-5Ti-B refiner product and FIG. 2 (B) is a microstructure of an Al-5Ti-B refiner product treated according to the invention.
FIG. 3 (a) is a microstructure of an AA6013 aluminum alloy treated with a prior art Al-5Ti-B refiner product and FIG. 3 (B) is a microstructure of an AA6013 aluminum alloy treated with an Al-5Ti-B refiner product of the invention.
FIG. 4 (a) is a microstructure of an A356.2 aluminum alloy treated with a prior art Al-5Ti-B refiner product and FIG. 4 (B) is a microstructure of an A356.2 aluminum alloy treated with an Al-5Ti-B refiner product of the invention.
In the figure: 1-raw material wire; 2-pressing wheels; 3-a feeding wheel; 4-a cleaner; 5-a feed shoe; 6-a wear-resistant lining; 7-a trough; 8-blocking; 9, material cavity mold; 10-a block supporting seat; 11-product mold; 12-a mold support base; 13-mold outer insert; 14-finished wire.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention, and are not limiting of the claims of the invention. The scope of the invention is not limited by the following examples.
According to the preparation method of the aluminum and aluminum alloy refiner, the refiner with ultrahigh refining efficiency is obtained through large-angle deformation. The core of the method is that the existing refiner alloy wire is subjected to deep processing, clusters of refiner particles can be effectively eliminated, and effective particles in the refiner are uniformly dispersed in a matrix, so that the refining efficiency of the refiner is obviously improved, meanwhile, impurities in the refiner alloy can be crushed, the size of the impurities is reduced, the dispersibility of the impurities in the matrix is improved, the harmfulness of the impurities is reduced, and the quality standard of the refiner is improved.
The technology has the advantages of simple process, low cost, strong universality, high refining efficiency, stable organization and the like. The method is suitable for not only conventional aluminum titanium boron refiners, but also aluminum titanium carbon, aluminum niobium boron and other alloy refiners.
FIG. 1 is a schematic diagram of an apparatus for producing aluminum and aluminum alloy refiners.
The existing refiner alloy wire (round wire with a diameter of about 10 mm) is introduced into a feeding wheel 3 with special grooves, under the action of the common rotation of a pressing wheel 2 and the feeding wheel 3, the refiner alloy wire enters a trough 7 and causes larger shearing rate difference and larger friction force, so that the temperature of the refiner alloy wire is rapidly increased, a blocking block 8 is placed in the horizontal tangential direction of the trough, the effect of the blocking block 8 is to force the flowing direction of the refiner alloy wire to change by 90 degrees or other angles, so that large deformation is generated, and then the deformed alloy enters a material cavity die 9 to be quenched and tempered, and then a new finished wire 14 is formed through a product die 11.
In the manufacturing method of the present invention, the feed wheel 3 is a driving wheel, and functions to continuously convey the raw material wire 1 and to generate sufficient shearing force and friction force so that the raw material wire continuously moves and generates a temperature rise. The design size of the feed wheel should therefore be relatively large, typically 100 to 300 mm in diameter. The pinch roller 2 is a driven wheel, and the function of the pinch roller is to ensure that the feeding wire rod can smoothly enter the trough 7 without bearing great force and moment. Therefore, the design size of the pinch roller is smaller, and the diameter is generally smaller than 100 mm. In order to ensure that the feed wire is able to withstand sufficient shear and friction forces, a feed shoe 5 with a wear lining 6 is provided along the trough 7 on one side of the feed wheel 3. In operation, the feed shoe 5 is stationary, which provides a large shear force. The gap between the wear-resistant lining 6 and the trough 7 can be adjusted to ensure that the raw material wire can be deformed smoothly. In the direction along the horizontal diameter of the feeding wheel 3, a block is arranged in the trough 7 to change the flow direction of the raw material wire rod so as to realize large-angle deformation. Generally, a 90 degree deformation is best, a mechanical construction is easy to achieve, but other angles can be achieved by changing the angle of the block 8. The deformed material enters a cavity die 9 and has the functions of tempering and temperature adjustment. Since the linear speeds of the alloys are different when the alloys are deformed at a large angle, a mixing process is generated after the alloys enter the cavity die 9, and the quality adjustment of the materials is realized. Meanwhile, the cavity die 9 can be heated or cooled according to the materials, so that the materials enter the product die 11 at the optimal temperature, and the final finished wire 14 is manufactured through the product die 11. The design of the product die 11 is similar to a conventional extrusion die design. The cross section of the product treated according to the invention may be the same as or different from the cross section of the raw wire 1. It is apparent that the refiner wire may be processed either a single time or multiple times. However, the number of processing times is generally not more than 5 times, preferably not more than 3 times. Excessive processing times cannot further improve the refining efficiency, and also increase the production cost.
In a particular embodiment of the invention, the feedstock wire 1 is pressed into a trough 7 on the feed wheel 3 by the combined rotation of the pinch roller 2 and the feed wheel 3. A feeding shoe 5 is arranged beside the feeding wheel 3, and a wear-resistant lining 6 matched with the trough 7 is arranged on the feeding shoe 5. The raw material wire 1 is compressed in the trough 7 along the tangential direction of the feeding wheel 3, and the temperature of the raw material wire 1 is gradually increased by the increasing friction and pressure. A blocking block 8 and a blocking block supporting seat 10 are arranged in the horizontal tangential direction of the trough 7. When the wire is rotated on the block 8, its temperature is in the range of 250-500 ℃. At this time, the flow direction of the wire 1 is changed from the tangential direction along the feed wheel 3 to the radial direction along the feed wheel 3 by the block 8. Then enters the cavity die 9, is subjected to tempering and temperature adjustment in the cavity die 9, immediately enters a product die 11 formed by combining a die supporting seat 12 and a die outer insert 13, and finally forms a finished wire 14. To clean the feed wheel 3 and the chute 7 of residual material, a cleaner 4 is mounted on the feed wheel 3.
FIG. 2 is a microstructure of an Al-5Ti-B refiner product, wherein FIG. 2 (a) is a microstructure of a prior art Al-5Ti-B refiner product and FIG. 2 (B) is a microstructure of an Al-5Ti-B refiner product treated by the technique of the present invention. Obviously, in the conventional product, as shown in FIG. 2 (a), the phenomenon of small square-shaped TiB2 clusters is serious, and many inclusions without fixed shapes exist. After the technical treatment of the invention, the cluster phenomenon is obviously reduced and basically eliminated, most of particles are in a dispersed state, and the inclusions become fine.
Example 1 is a grain refinement implementation in which a refiner is used in wrought aluminum alloys. The casting production steps are as follows: (1) The AA6013 aluminum ingot is put into a melting furnace, heated to be melted, kept stand at 730 ℃ for 30 minutes, then the alloy melt is subjected to in-furnace degassing, the temperature is regulated to 700 ℃ after the degassing and deslagging treatment by a rotary blowing method, and then 0.2 percent of the refiner manufactured by the invention is added and is gently stirred uniformly. Wait half an hour for casting. (2) The melt was quantified and transferred to a billet caster with adjusted working conditions for casting to produce a round ingot with a diameter of 100 mm. (3) carrying out solid solution treatment on the cast ingot. The temperature of the solution treatment was 540℃and the time was 6 hours. The extrusion was directly carried out at the end of the solution treatment, and the extrusion ratio was 50. The extruded product was a round bar with a diameter of 14 mm. (4) The grain size analysis was performed by sampling on a round bar cross section having a diameter of 14 mm.
FIG. 3 is a microstructure of a round bar of 14 mm diameter in cross section, wherein FIG. 3 (a) is a microstructure of an AA6013 aluminum alloy treated with a prior art Al-5Ti-B refiner product and FIG. 3 (B) is a microstructure of an AA6013 aluminum alloy treated with an Al-5Ti-B refiner product of the invention. Obviously, the AA6013 aluminum alloy treated with the existing Al-5Ti-B refiner has a slightly more added amount of 2.0kg/t, and the primary phase grain size of aluminum is slightly larger and reaches 145 mu m. However, the AA6013 aluminum alloy treated by the Al-5Ti-B refiner of the invention has less refiner added in an amount of 1.7kg/t, and the primary phase grain size of the aluminum is smaller and can be 125 μm.
Example 2 is a grain refinement implementation in which a refiner is used in a cast aluminum alloy. The casting production steps are as follows: (1) Putting an A356.2 aluminum ingot into a furnace, heating to melt the aluminum ingot, standing at 730 ℃ for 30 minutes, degassing the alloy melt in the furnace, degassing by a rotary blowing method, deslagging, regulating the temperature to 700 ℃, adding 0.2% of the refiner, slightly stirring uniformly, and waiting for half an hour for casting. (2) The melt was dosed and poured into a metal mold preheated to 200 c and adjusted for casting to produce a round cast rod with a diameter of 20 mm. (3) The grain size analysis was performed by sampling on a round bar cross section of 20 mm in diameter.
FIG. 4 is a microstructure of a round bar of 14 mm diameter in cross section, wherein FIG. 4 (a) is a microstructure of an A356.2 aluminum alloy treated with a prior art Al-5Ti-B refiner product and FIG. 4 (B) is a microstructure of an A356.2 aluminum alloy treated with an Al-5Ti-B refiner product of the invention. Obviously, the AA6013 aluminum alloy treated by the existing Al-5Ti-B refiner has a slightly more adding amount which reaches 2.1kg/t, and the primary phase grain size of aluminum is slightly larger and reaches 243 mu m. However, the AA6013 aluminum alloy treated by the Al-5Ti-B refiner of the invention has less refiner, the addition amount is only 1.8kg/t, and the grain size of the primary phase of aluminum is smaller and reaches 157 mu m.
Table 1 is refinement efficiency analysis data. From the calculation data, the refiner treated by the method can obviously improve the refining efficiency no matter the refiner is a wrought alloy or a cast alloy. For AA6013 wrought alloy, the refining efficiency is improved by about 100%. For the a356.2 cast alloy, the refining efficiency was improved by about 400%. Therefore, the method provided by the patent has remarkable effect.
Table 1 refinement efficiency analysis data
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The preparation method of the aluminum and aluminum alloy refiner is characterized in that the existing aluminum and aluminum alloy refiner is improved based on a preparation device of the aluminum and aluminum alloy refiner; the preparation device of the aluminum and aluminum alloy refiner comprises a pressing wheel (2), a feeding wheel (3), a feeding shoe (5), a trough (7) and a blocking block (8); a trough (7) is arranged on the circumferential side of the feeding wheel (3), and the pinch roller (2) is tangentially arranged with the feeding wheel (3); the feeding wheel (3) is a driving wheel, and the pressing wheel (2) is a driven wheel; the feeding shoe (5) is fixed on the outer side of the feeding wheel (3), one end of the feeding shoe is externally fixed with a blocking block (8), and the blocking block (8) is positioned in the horizontal tangential direction of the trough (7); the material cavity die (9) is arranged on one side of the feeding wheel (3), and forms a cylindrical space with an inlet and an outlet together with the blocking block (8), the material groove (7) and the feeding shoe (5), so that materials flowing out of the material groove (7) and the blocking block (8) are ensured to enter the material cavity die (9); a product mould (11) is fixed at the outer side of the material cavity mould (9);
the raw material wire (1) is led into the feeding wheel (3), under the action of the common rotation of the pressing wheel (2) and the feeding wheel (3), the raw material wire (1) enters the trough (7) and forms relative motion with the feeding shoe (5), and the blocking block (8) arranged on the horizontal tangential direction of the trough (7) changes the flow direction of the raw material wire (1); the raw material wire (1) enters a material cavity die (9) for homogenizing and tempering after being deformed, the temperature is adjusted to be within the range of 200-400 ℃, and the finished wire (14) is obtained through a product die (11).
2. The method for producing aluminum and aluminum alloy refiners according to claim 1, characterized in that the cavity mold (9) is equipped with a heating system or a cooling system.
3. The method for preparing the aluminum and aluminum alloy refiner according to claim 1 or 2, wherein the central angle between the blocking block (8) and the contact point of the pressing wheel (2) and the feeding wheel (3) is 90 degrees.
4. A method of producing aluminium and aluminium alloy refiners according to claim 3, characterized in that the diameter of the feed wheel (3) is larger than the diameter of the pinch wheel (2).
5. The method for producing aluminum and aluminum alloy refiners according to claim 1, 2 or 4, characterized in that the feed shoe (5) is provided with a wear-resistant lining (6) on the feed wheel (3) side.
6. The method for producing aluminum and aluminum alloy refiner according to claim 5, wherein the aluminum and aluminum alloy refiner producing apparatus performs single or multiple processing of the raw wire (1); the processing times are not more than 5 times.
7. The method of producing aluminum and aluminum alloy refiners according to claim 6, wherein the number of processing times is not more than 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311238419.6A CN117328000A (en) | 2023-09-25 | 2023-09-25 | Preparation method of aluminum and aluminum alloy refiner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311238419.6A CN117328000A (en) | 2023-09-25 | 2023-09-25 | Preparation method of aluminum and aluminum alloy refiner |
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| CN117328000A true CN117328000A (en) | 2024-01-02 |
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| CN202311238419.6A Pending CN117328000A (en) | 2023-09-25 | 2023-09-25 | Preparation method of aluminum and aluminum alloy refiner |
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- 2023-09-25 CN CN202311238419.6A patent/CN117328000A/en active Pending
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