CN111647782A - Regenerated aluminum alloy and preparation method thereof - Google Patents
Regenerated aluminum alloy and preparation method thereof Download PDFInfo
- Publication number
- CN111647782A CN111647782A CN202010565961.2A CN202010565961A CN111647782A CN 111647782 A CN111647782 A CN 111647782A CN 202010565961 A CN202010565961 A CN 202010565961A CN 111647782 A CN111647782 A CN 111647782A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- temperature
- alloy
- vibration
- melt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000956 alloy Substances 0.000 claims abstract description 41
- 238000005266 casting Methods 0.000 claims abstract description 37
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 36
- 238000001125 extrusion Methods 0.000 claims abstract description 35
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 22
- 239000000155 melt Substances 0.000 claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 12
- 238000007670 refining Methods 0.000 claims abstract description 7
- 229910018084 Al-Fe Inorganic materials 0.000 claims abstract description 4
- 229910018131 Al-Mn Inorganic materials 0.000 claims abstract description 4
- 229910018125 Al-Si Inorganic materials 0.000 claims abstract description 4
- 229910018192 Al—Fe Inorganic materials 0.000 claims abstract description 4
- 229910018461 Al—Mn Inorganic materials 0.000 claims abstract description 4
- 229910018520 Al—Si Inorganic materials 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 3
- 238000002844 melting Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 description 13
- 239000012071 phase Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000005070 sampling Methods 0.000 description 5
- 238000007872 degassing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009716 squeeze casting Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 210000001787 dendrite Anatomy 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010118 rheocasting Methods 0.000 description 1
- -1 scrapped automobiles Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the field of aluminum alloy, and relates to a regenerated aluminum alloy and a preparation method thereof. The regenerated aluminum alloy mainly comprises the following components: 6.5-17% of Si, 1-5% of Fe, 0.5-1.5% of Mn, 0-1% of impurity elements and the balance of Al. The preparation method of the recycled aluminum alloy comprises the following steps: melting waste aluminum materials, adjusting the components of aluminum liquid by adding intermediate alloys such as Al-Fe, Al-Si, Al-Mn and the like and pure Al to meet the component requirements, refining, preserving heat, pouring, applying mechanical vibration to a melt, and performing rheo-extrusion casting when the temperature is reduced to a semi-solid temperature range to finally obtain the regenerated aluminum alloy. The invention prepares a recycled aluminum alloy with good comprehensive performance and guaranteed utilization through mechanical vibration and rheo-extrusion casting, and the preparation method has the advantages of simple process, low cost and the like.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy, and particularly relates to a regenerated aluminum alloy and a preparation method thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The aluminum alloy has the advantages of low density, high strength, good plasticity, excellent heat conductivity, electric conductivity, corrosion resistance and the like, so that the aluminum alloy is widely applied to various fields of aerospace, transportation, buildings, automobiles and the like. With the rapid development of economy, the consumption of aluminum alloy is increased year by year, and the aluminum alloy becomes the second largest metal material next to steel. Under the large environment that the energy is increasingly in shortage and the environmental protection policy is increasingly strict, the recycling of the aluminum alloy is greatly promoted.
Leftover materials, scrapped products and waste products after the end of service life generated in the manufacturing of aluminum and aluminum alloy products are collectively called waste aluminum scraps, and the waste aluminum scraps comprise process leftover materials, scrapped automobiles, waste ring-pull cans, waste aluminum alloy doors and windows and the like. The waste aluminum impurities are wide in source, high in impurity content and the like, so that the problems that the recycled aluminum alloy product is degraded in use, low in added value and the like are caused, and the waste of resource and energy is generated. Therefore, it is an urgent need for those skilled in the art to improve the comprehensive properties of the secondary aluminum alloy and achieve the guaranteed utilization thereof.
The regenerated aluminum alloy has large crystal grains, segregation of components, casting defects such as air holes, shrinkage porosity and the like, and the alloy performance is seriously influenced, so that the rejection rate of the material is higher. In addition, Fe element has been considered as the most harmful impurity element in aluminum alloys, and the content gradually increases as the number of life cycles of secondary aluminum increases. Because the solid solubility of Fe in aluminum is only 0.05 wt.%, most of Fe forms a thick, long and narrow needle-shaped brittle Fe-rich phase in an aluminum matrix, and a severe cutting effect is generated on the aluminum alloy matrix, so that the plasticity, toughness and the like of the aluminum alloy product are obviously reduced.
Disclosure of Invention
In order to overcome the problems, the invention provides a regenerated aluminum alloy with good comprehensive performance, which has excellent comprehensive mechanical properties, higher strength, no precious metal, low cost and better economic benefit.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides a regenerated aluminum alloy, which comprises the following chemical components in percentage by mass: 6.5-17% of Si, 1-5% of Fe, 0.5-1.5% of Mn, and the balance of Al and inevitable impurities.
The element Si is usually used as a basic element in the aluminum alloy, and the fluidity and the corrosion resistance of the aluminum alloy can be greatly improved by adding a proper amount of Si. The Fe element is added, and when the formed Fe-rich compound is in the forms of Chinese characters, branches and the like, the Fe-rich compound is often used as a matrix strengthening phase, so that the wear resistance, the high-temperature performance and the mechanical property of the alloy can be improved. The addition of Mn can effectively improve the appearance of the Fe-rich phase, the Mn element is similar to the Fe element in atomic size and is easy to form a replacement solid solution with Fe, the Mn element is added into the Fe-containing Al-Si alloy to replace Fe in the Fe-rich phase, and the crystal structure and the dominant growth orientation of the Fe-rich phase are changed, so that the acicular Fe-rich phase is eliminated.
In a second aspect of the present invention, there is provided a method for producing a recycled aluminum alloy, comprising:
melting the waste aluminum material, adding intermediate alloy and pure Al into the waste aluminum material to enable the chemical composition of the waste aluminum material to reach the target content, and refining, preserving heat and stirring the waste aluminum material after the waste aluminum material is uniformly melted;
applying mechanical vibration in the solidification and cooling process, and cooling to a semi-solid temperature range for rheo-extrusion casting;
the target content is that the secondary aluminum alloy consists of the following chemical components in percentage by mass: 6.5-17% of Si, 1-5% of Fe, 0.5-1.5% of Mn, and the balance of Al and inevitable impurities.
The method applies mechanical vibration in the process of solidifying and cooling the melt, the mechanical vibration promotes nucleation of the metal liquid, breaks dendritic crystals (grain refinement), reduces alloy segregation (homogenized structure), promotes separation and floating of slag gas (degassing and impurity removal, melt purification), enhances feeding of the metal liquid (density improvement) and the like, and simultaneously influences the shape, size and distribution of a second phase in the alloy, so that the metallographic structure of the casting is improved, and the comprehensive performance of the casting is improved.
Meanwhile, rheologic extrusion casting is adopted when the melt is cooled to a semi-solid temperature range. The rheo-extrusion casting forming process integrates the dual advantages of extrusion casting and semi-solid processing techniques. The viscosity of the semi-solid metal is higher than that of the liquid metal, and the semi-solid metal is filled in a laminar flow mode, so that the entrainment of gas can be reduced and even eliminated, the gas inclusion is reduced, and the porosity is reduced. The semi-solid metal already contains a certain fraction of solid phase spherical particles during casting, so that the probability of shrinkage cavity and shrinkage porosity can be reduced. The squeeze casting is solidified under higher pressure and generates plastic deformation, so that the micro shrinkage porosity and macro shrinkage cavity can be effectively reduced, the crystal grains can be refined, and the surface quality of the alloy can be improved.
The invention has the beneficial effects that:
(1) the invention provides a regenerated aluminum alloy material, which can realize the guaranteed utilization of regenerated aluminum alloy, has excellent comprehensive mechanical property, tensile strength of 363MPa and elongation of 2.45 percent, and has strength superior to that of the conventional common regenerated aluminum alloy.
(2) The invention adopts a new casting technology, namely mechanical vibration and rheo-extrusion casting. The method is characterized in that the semisolid slurry is prepared under the optimal mechanical vibration condition, and then rheo-extrusion casting is carried out.
(3) The casting technology of the invention can effectively refine the size distribution of the secondary aluminum alloy grains and the second phase, and unnecessary impurities are introduced without adding excessive alloy elements.
(4) The preparation method of the regenerated aluminum alloy is simple, short in flow, low in energy consumption and low in cost, and the regenerated aluminum alloy with excellent comprehensive performance can be obtained without special equipment.
(5) The method is simple, low in cost, strong in practicability and easy to popularize.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a photograph of the metallographic structure of the alloy of example 1 of the invention (a) the microstructure of a gravity cast alloy; (b) mechanical vibration + rheo-extrusion casting of the alloy microstructure.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Interpretation of terms
In the present application, pure Al, Al-10Fe, Al-10Mn, and Al-30Si are all in terms of mass fraction.
A secondary aluminum alloy comprises the following chemical components in percentage by mass: 6.5-17% of Si, 1-5% of Fe, 0.5-1.5% of Mnand the balance of Al and inevitable impurities.
The preparation method of the regenerated aluminum alloy is innovative, simple in process and short in preparation flow, and comprises the following steps: smelting, mechanical vibration and rheo-extrusion casting.
In some embodiments, the waste aluminum material is melted, the components of the aluminum melt are adjusted according to the content requirements of the Si, the Fe and the Mn, and then Al-Fe, Al-Si, Al-Mn intermediate alloy and pure Al are added according to the proportion. After the raw materials are all melted, refining, preserving heat and stirring the melt. The Fe-rich phase has the characteristics of high hardness, good thermal stability and the like, so that the wear resistance and the heat resistance of the alloy can be greatly improved, and the appearance and the size of the Fe-rich phase can be improved to be beneficial.
In some embodiments, the preheating temperature of the pure Al, Al-Fe, Al-Si and Al-Mn intermediate alloy is 200-220 ℃ and the preheating time is 20-30 min.
In some embodiments, the alloy melt is poured into a vibration sample cup when the temperature is reduced to 600-700 ℃. The preheating temperature of the vibration sample cup is 500-600 ℃.
In some embodiments, mechanical vibration is applied to the melt during solidification and cooling, and the melt is kept at the temperature 20-100 ℃ above the solidus temperature and continuously vibrated. Under the mechanical vibration condition, because the temperature of vibration appearance cup wall is less than the liquid phase temperature of fuse-element and produces the subcooling, form a large amount of crystal nuclei, the fuse-element convection current that the vibration produced simultaneously makes the crystal nuclei on the cup wall drop free, gets into inside the fuse-element, and temperature fluctuation and convection current will make free crystal nuclei take place to proliferate in the fuse-element that arouses by the vibration. The vibration brings the melt with higher temperature inside to the surface and the cup wall, and the overcooling is generated to form crystal nucleus. In addition, convection exacerbates structural and energy fluctuations within the melt, greatly increasing the probability of cluster aggregation into nuclei. The convection generated by mechanical vibration enables crystal nuclei generated by supercooling to be dissociated in the whole melt, so that the growth heat transfer and mass transfer states in all directions tend to be consistent, and the generation of dendrites is inhibited; on the other hand, due to the action of convection and crystal nucleus movement, the concentration gradient and the temperature gradient of the front edge of the crystal grain are changed, so that the overcooling of the components of the front edge of the crystal grain is reduced, and the growth of dendrites is inhibited. In addition, mechanical vibration is applied in the alloy solidification process, slag gas separation and floating can be promoted, metal liquid feeding is enhanced, and the like, macroscopic and microscopic defects of castings are reduced, and the quality of the castings is improved. Meanwhile, the mechanical vibration has certain influence on the form, size and distribution of the second phase in the alloy. Therefore, the mechanical vibration can effectively refine alloy grains, improve the second phase in the alloy and improve the quality of a casting, thereby improving the performance of the alloy, and the method is a simple and effective process method.
In some embodiments, the mechanical vibration has a vibration frequency of 10 to 60Hz, an amplitude of 0.1 to 1.0mm, and a vibration time of 1 to 20 min. Wherein the vibration time is the vibration time in the alloy heat preservation process.
In some embodiments, the melt is cast into an extrusion die and allowed to air cool to room temperature after rheo-casting.
The rheo-squeeze casting forming process combines the dual advantages of squeeze casting and semi-solid processing techniques. Because the extrusion casting is solidified under higher pressure, the workpiece also generates certain plastic deformation, so that the micro shrinkage porosity and macro shrinkage cavity in the casting can be effectively eliminated, the alloy crystal grains can be effectively refined, and the casting has good mechanical property and surface quality. In addition, the extrusion casting technology is an efficient and accurate forming technology, riser feeding is not needed, the process is simple, and the metal utilization rate is high. The semi-solid processing temperature is lower than that of the liquid state, the solidification shrinkage is small, so that the casting porosity is less (or no), the mold filling is stable, the air hole defect and the oxide inclusion are less (or no), and the casting quality of the alloy is improved. The lower semi-solid processing temperature is beneficial to prolonging the service life of the die and has a plurality of unique advantages of net forming, high quality, high performance, low energy consumption, low cost and the like. Therefore, mechanical vibration and rheo-extrusion casting would be a very effective process to improve the properties of recycled aluminum alloys.
In some embodiments, the pouring temperature of the rheo-extrusion casting is 570-630 ℃, the injection specific pressure is 100-200 MPa, the extrusion speed is 1-2 m/s, and the pressure maintaining time is 10-60 s.
In some embodiments, the preheating temperature of the rheo-extrusion casting die is 150-250 ℃, and the preheating temperature is kept until the rheo-extrusion casting is finished.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
(1) The alloy comprises the following components in percentage by mass: 7% of Si, 0.6% of Fe, 0.3% of Mn, and the balance of Al and inevitable impurities. Putting 1kg of cleaned, sorted and preheated aluminum scrap into a well-type resistance furnace, heating to 800 ℃, stirring after the aluminum scrap is completely melted, sampling from the middle part of a melt by using a sampling spoon, and testing alloy components, wherein the mass percent is as follows: 11% of Si, 0.5% of Cu, 1% of Mg, 0.7% of Ni, and the balance of Al and inevitable impurities. Adding the following elements according to the required quality of the target alloy components: 430g of pure Al, 94g of Al-10Fe and 47g of Al-10Mn, stirring after the added ingredients are completely melted, cooling to 720 ℃, refining the melt, degassing, removing impurities, standing for 20 minutes, stirring, and then cooling to 650 ℃.
(2) Pouring the melt into a vibration sample cup, starting vibration when the temperature is reduced to 630 ℃, preserving heat when the temperature is reduced to 605 ℃, and stopping vibration for 3 min. Wherein the preheating temperature of the vibration sample cup is 550 ℃, the vibration frequency is 30HZ, and the amplitude is 0.6 mm.
(3) And pouring the vibrated melt into an extrusion die, and performing rheologic extrusion casting to obtain the regenerated aluminum alloy material. Wherein the pouring temperature is 600 ℃, the injection specific pressure is 150MPa, the extrusion speed is 1.5m/s, the pressure maintaining time is 15s, and the extrusion die is preheated to 200 ℃.
Example 2
(1) The alloy comprises the following components in percentage by mass: 12% of Si, 1.0% of Fe, 0.5% of Mn, and the balance of Al and inevitable impurities. Putting 1kg of cleaned, sorted and preheated aluminum scrap into a well-type resistance furnace, heating to 800 ℃, stirring after the aluminum scrap is completely melted, sampling from the middle part of a melt by using a sampling spoon, and testing alloy components, wherein the mass percent is as follows: 11% of Si, 0.5% of Cu, 1% of Mg, 0.7% of Ni, and the balance of Al and inevitable impurities. Adding the following elements according to the required quality of the target alloy components: 25.4g of pure Al, 218.8g of Al-30Si, 146.4g of Al-10Fe and 73.2g of Al-10Mn, stirring after the added ingredients are completely melted, cooling to 720 ℃, refining the melt, degassing, removing impurities, standing for 20 minutes, stirring, and then cooling to 630 ℃.
(2) Pouring the melt into a vibration sample cup, starting vibration when the temperature is reduced to 610 ℃, preserving the temperature when the temperature is reduced to 580 ℃, and stopping the vibration for 5 min. Wherein the preheating of the vibration sample cup is 500 ℃, the vibration frequency is 40HZ, and the amplitude is 0.6 mm.
(3) And pouring the vibrated melt into an extrusion die, and performing rheologic extrusion casting to obtain the regenerated aluminum alloy material. Wherein the pouring temperature is 580 ℃, the injection specific pressure is 100MPa, the extrusion speed is 1.02m/s, the pressure maintaining time is 15s, and the extrusion die is preheated to 150 ℃.
Example 3
(1) The alloy comprises the following components in percentage by mass: 16% of Si, 2.0% of Fe, 2.0% of Mn, and the balance of Al and inevitable impurities. 0.1kg of waste aluminum materials subjected to cleaning, sorting and preheating treatment is put into a well-type resistance furnace, heated to 800 ℃, stirred after being completely melted, sampled from the middle part of a melt by a sampling spoon, and used for testing alloy components, wherein the mass percentages are as follows: 11% of Si, 0.5% of Cu, 1% of Mg, 0.7% of Ni, and the balance of Al and inevitable impurities. According to the requirements of target alloy components, the mass of the added elements is 78g of pure Al, 1028g of Al-30Si, 402g of Al-10Fe and 402g of Al-10 Mn. Stirring after the added ingredients are completely melted, cooling to 720 ℃, refining the melt, degassing, removing impurities, standing for 20 minutes, stirring, and then cooling to 680 ℃.
(2) Pouring the melt into a vibration sample cup, starting vibration when the temperature is reduced to 650 ℃, preserving the temperature when the temperature is reduced to 620 ℃, and stopping the vibration for 2 min. Wherein the preheating of the vibration sample cup is 500 ℃, the vibration frequency is 40HZ, and the amplitude is 0.6 mm.
(3) And pouring the vibrated melt into an extrusion die, and performing rheologic extrusion casting to obtain the regenerated aluminum alloy material. Wherein the pouring temperature is 620 ℃, the injection specific pressure is 170MPa, the extrusion speed is 1.2m/s, the pressure maintaining time is 15s, and the extrusion die is preheated to 250 ℃.
TABLE 1 mechanical Properties (as-cast condition) of respective regenerated aluminum alloy materials in examples
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The secondary aluminum alloy is characterized by comprising the following chemical components in percentage by mass: 6.5-17% of Si, 1-5% of Fe, 0.5-1.5% of Mn, and the balance of Al and inevitable impurities.
2. The secondary aluminum alloy according to claim 1, which comprises the following chemical components in percentage by mass: 6.5-11.5% of Si, 1-3% of Fe, 0.5-1% of Mn, and the balance of Al and inevitable impurities.
3. The secondary aluminum alloy according to claim 1, which comprises the following chemical components in percentage by mass: 11.5-17% of Si, 3-5% of Fe, 1-1.5% of Mn, and the balance of Al and inevitable impurities.
4. A preparation method of a recycled aluminum alloy is characterized by comprising the following steps:
melting the waste aluminum material, adding intermediate alloy and pure Al into the waste aluminum material to enable the chemical composition of the waste aluminum material to reach the target content, and refining, preserving heat and stirring the waste aluminum material after the waste aluminum material is uniformly melted;
applying mechanical vibration in the solidification and cooling process, and cooling to a semi-solid temperature range for rheo-extrusion casting;
the target content is that the secondary aluminum alloy consists of the following chemical components in percentage by mass: 6.5-17% of Si, 1-5% of Fe, 0.5-1.5% of Mn, and the balance of Al and inevitable impurities.
5. The method for producing a recycled aluminum alloy as claimed in claim 1, wherein the master alloy is one or more of Al-Fe, Al-Si, and Al-Mn;
or the preheating temperature of the intermediate alloy and the pure Al is 200-220 ℃, and the preheating time is 20-30 min.
6. The method for preparing recycled aluminum alloy as claimed in claim 4, wherein the melt is kept warm for 30min after the raw materials are all melted, and the alloy melt is stirred during the keeping warm process.
7. The method for producing a recycled aluminum alloy as claimed in claim 4, wherein the solidification cooling is performed until the melt temperature is 600 to 700 ℃, the mechanical vibration is applied, and the vibration is continued while maintaining the temperature until the melt temperature is lowered to 20 to 100 ℃ above the solidus temperature.
8. The method for producing a recycled aluminum alloy as claimed in claim 4, wherein the mechanical vibration has a frequency of 10 to 60Hz, an amplitude of 0.1 to 1.0mm, and a vibration time of 1 to 20 min;
or the preheating temperature of the vibration sample cup is 500-600 ℃.
9. The method for producing a recycled aluminum alloy as claimed in claim 4, wherein the casting temperature in the rheo-extrusion casting is 570 to 630 ℃, the injection specific pressure is 100 to 200MPa, the extrusion speed is 1 to 2m/s, and the pressure holding time is 10 to 60 s.
10. The method for preparing the recycled aluminum alloy as claimed in claim 4, wherein the preheating temperature of the rheo-extrusion casting die is 150-250 ℃, the preheating temperature is kept until the rheo-extrusion casting is finished, and the obtained recycled aluminum material is air-cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010565961.2A CN111647782A (en) | 2020-06-19 | 2020-06-19 | Regenerated aluminum alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010565961.2A CN111647782A (en) | 2020-06-19 | 2020-06-19 | Regenerated aluminum alloy and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111647782A true CN111647782A (en) | 2020-09-11 |
Family
ID=72340938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010565961.2A Pending CN111647782A (en) | 2020-06-19 | 2020-06-19 | Regenerated aluminum alloy and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111647782A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113234949A (en) * | 2021-05-12 | 2021-08-10 | 南昌大学 | Method for preparing regenerated wrought aluminum alloy from waste aluminum alloy |
| CN113667864A (en) * | 2021-08-30 | 2021-11-19 | 合肥工业大学 | Preparation process of Al-Si-Mg-B-Mn casting alloy with excellent fluidity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147769B1 (en) * | 1983-12-19 | 1990-10-17 | Sumitomo Electric Industries Limited | Dispersion-strengthened heat- and wear-resistant aluminum alloy and process for producing same |
| CA2360673A1 (en) * | 1999-01-21 | 2000-07-27 | Aluminium Pechiney | Hypereutectic aluminium-silicon alloy product for semisolid forming |
| CN108796317A (en) * | 2018-06-25 | 2018-11-13 | 苏州慧驰轻合金精密成型科技有限公司 | Suitable for new-energy automobile can semi-solid squeeze casting aluminium alloy and preparation method |
| CN108998687A (en) * | 2018-07-25 | 2018-12-14 | 广东省材料与加工研究所 | A kind of Fe-riched phase alterant and preparation method thereof and Modification Manners |
-
2020
- 2020-06-19 CN CN202010565961.2A patent/CN111647782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147769B1 (en) * | 1983-12-19 | 1990-10-17 | Sumitomo Electric Industries Limited | Dispersion-strengthened heat- and wear-resistant aluminum alloy and process for producing same |
| CA2360673A1 (en) * | 1999-01-21 | 2000-07-27 | Aluminium Pechiney | Hypereutectic aluminium-silicon alloy product for semisolid forming |
| CN108796317A (en) * | 2018-06-25 | 2018-11-13 | 苏州慧驰轻合金精密成型科技有限公司 | Suitable for new-energy automobile can semi-solid squeeze casting aluminium alloy and preparation method |
| CN108998687A (en) * | 2018-07-25 | 2018-12-14 | 广东省材料与加工研究所 | A kind of Fe-riched phase alterant and preparation method thereof and Modification Manners |
Non-Patent Citations (4)
| Title |
|---|
| 厉衡隆等: "《铝冶炼生产技术手册 下》", 31 July 2011, 冶金工业出版社 * |
| 向凌霄: "《原铝及其合金的熔铸生产问答》", 28 February 2011, 冶金工业出版社 * |
| 吴树森等: "《铝、镁合金熔炼与成形加工技术》", 31 March 2012, 机械工业出版社 * |
| 机械工人应知考核题解丛书编审委员会: "《铸造工应知考核题解》", 30 April 1999, 机械工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113234949A (en) * | 2021-05-12 | 2021-08-10 | 南昌大学 | Method for preparing regenerated wrought aluminum alloy from waste aluminum alloy |
| CN113234949B (en) * | 2021-05-12 | 2022-10-11 | 南昌大学 | Method for preparing regenerated wrought aluminum alloy from waste aluminum alloy |
| CN113667864A (en) * | 2021-08-30 | 2021-11-19 | 合肥工业大学 | Preparation process of Al-Si-Mg-B-Mn casting alloy with excellent fluidity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102127665B (en) | Al-Zn-Mg-Cu-Sc-Zr-RE alloy capable of being used as ultrahigh-strength cast aluminum alloy | |
| Thanabumrungkul et al. | Industrial development of gas induced semi-solid process | |
| CN110218885A (en) | A kind of high tough extrusion casint aluminium alloy and preparation method thereof | |
| GUO et al. | Effects of rheoforming on microstructures and mechanical properties of 7075 wrought aluminum alloy | |
| CN113061787A (en) | High-strength high-toughness Al-Si-Cu-Mg-Cr-Mn-Ti series casting alloy and preparation method thereof | |
| CN114457263B (en) | High-strength high-toughness high-heat-conductivity die-casting aluminum alloy and manufacturing method thereof | |
| CN110643862A (en) | Aluminum alloy for new energy automobile battery shell and pressure casting preparation method thereof | |
| CN106609331A (en) | High-plasticity die-cast magnesium alloy and forming method thereof | |
| CN106676346A (en) | Aluminum alloy material capable of being anodized and suitable for semi-solid forming and preparing method of aluminum alloy material | |
| CN110129638A (en) | A kind of changeable sectional crush profile of space flight aluminium alloy and preparation method thereof | |
| CN102758109A (en) | High-strength wear-resisting heat-resisting aluminium alloy material and preparation process thereof | |
| CN114351017B (en) | Casting method and application of high-toughness high-heat-conductivity aluminum alloy ingot | |
| CN112626400A (en) | High-toughness aluminum alloy and preparation method thereof | |
| CN110373574A (en) | A kind of nearly cocrystallizing type high-strength temperature-resistant Al-Ce line aluminium alloy and preparation method | |
| CN104532078A (en) | AHS aluminum alloy and aluminum alloy extruded rod thereof | |
| CN111647782A (en) | Regenerated aluminum alloy and preparation method thereof | |
| CN103589926A (en) | Hot-extruded magnesium alloy and preparation method thereof | |
| Yang et al. | Preparation of semisolid A356 alloy slurry with larger capacity cast by serpentine channel | |
| CN109881057A (en) | A kind of high-strength and high ductility material and preparation method thereof | |
| CN111041291B (en) | High-strength aluminum alloy material and preparation method thereof | |
| CN111607726B (en) | Rare earth magnesium alloy and preparation method thereof | |
| CN113444911A (en) | High-strength high-toughness Al-Mg- (Al-Ti-Nb-B) alloy and preparation method thereof | |
| CN102719703B (en) | Multi-component zinc-aluminium alloy capable of enhancing comprehensive chemical properties | |
| CN115927936B (en) | High-strength and high-toughness aluminum alloy and preparation method thereof | |
| CN115786783B (en) | Semi-solid die-casting aluminum alloy and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200911 |
|
| RJ01 | Rejection of invention patent application after publication |