CN114717454A - Al-Si series aluminum alloy liquid and preparation method thereof - Google Patents
Al-Si series aluminum alloy liquid and preparation method thereof Download PDFInfo
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- CN114717454A CN114717454A CN202210385472.8A CN202210385472A CN114717454A CN 114717454 A CN114717454 A CN 114717454A CN 202210385472 A CN202210385472 A CN 202210385472A CN 114717454 A CN114717454 A CN 114717454A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 95
- 239000007788 liquid Substances 0.000 title claims abstract description 88
- 229910018125 Al-Si Inorganic materials 0.000 title claims abstract description 22
- 229910018520 Al—Si Inorganic materials 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000005266 casting Methods 0.000 claims abstract description 33
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 32
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052714 tellurium Inorganic materials 0.000 claims abstract description 32
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims abstract description 32
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000011777 magnesium Substances 0.000 claims abstract description 30
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 30
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 30
- 239000010703 silicon Substances 0.000 claims abstract description 30
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 30
- 239000011701 zinc Substances 0.000 claims abstract description 30
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 29
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 24
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 24
- 238000007670 refining Methods 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000001103 potassium chloride Substances 0.000 claims description 12
- 235000011164 potassium chloride Nutrition 0.000 claims description 12
- 239000011780 sodium chloride Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- 238000010116 semi-solid metal casting Methods 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 210000001787 dendrite Anatomy 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- C22C21/04—Modified aluminium-silicon alloys
-
- 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
-
- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of aluminum alloy materials, and particularly relates to an Al-Si series aluminum alloy liquid, which consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and comprises the following components in percentage by mass: 4.8 to 6.2 percent of silicon, 0.40 to 0.65 percent of magnesium, 1.2 to 1.8 percent of zinc, 0.10 to 0.25 percent of stibium, 0.2 to 0.8 percent of rhenium, 0.05 to 0.10 percent of tellurium and the balance of aluminum. The aluminum alloy liquid can be directly used for semi-solid casting without secondary smelting, so that the production efficiency is improved, the strength is ensured, the elongation is improved, and the casting forming effect is better.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to Al-Si series aluminum alloy liquid and a preparation method thereof.
Background
Aluminum alloy is an alloy based on aluminum with a certain amount of other alloying elements added, and is one of light metal materials. In addition to the general characteristics of aluminum, aluminum alloys have certain alloy specific characteristics due to the variety and amount of alloying elements added. The aluminum alloy has the density of 2.63-2.85 g/cm3, high strength (sigma b of 110-650 MPa), specific strength close to high alloy steel, specific stiffness higher than that of steel, good casting performance and plastic processing performance, good electric conductivity and heat conductivity, good corrosion resistance and weldability, can be used as a structural material, and has wide application in aerospace, transportation, construction, electromechanics, lightening and daily necessities.
Present aluminium alloy semisolid state casting enterprise all need oneself to smelt the aluminium ingot, just can carry out subsequent casting processing, and can not directly use the aluminium alloy liquid of aluminium ingot manufacturing enterprise preparation, equal to add more and once smelt the cost, and to the casting enterprise with the aluminium ingot manufacturing enterprise in the circumstances in an industrial park, be fit for very much carrying aluminium alloy liquid through the transportation package, consequently need urgently that the technical scheme of this application solves above-mentioned problem.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the Al-Si series aluminum alloy liquid which can be directly used for semi-solid casting without secondary smelting, so that the production efficiency is improved, the strength is ensured, the elongation is improved, and the casting forming effect is better.
The invention is realized in such a way, and on one hand, the invention provides an Al-Si series aluminum alloy liquid which consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and comprises the following components in percentage by mass: 4.8 to 6.2 percent of silicon, 0.40 to 0.65 percent of magnesium, 1.2 to 1.8 percent of zinc, 0.10 to 0.25 percent of stibium, 0.2 to 0.8 percent of rhenium, 0.05 to 0.10 percent of tellurium and the balance of aluminum.
In some embodiments, the aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the compositions in percentage by mass are as follows: 4.8% of silicon, 0.40% of magnesium, 1.2% of zinc, 0.10% of antimony, 0.2% of rhenium, 0.05% of tellurium and the balance of aluminum.
In some embodiments, the aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the compositions in percentage by mass are as follows: 5.5% of silicon, 0.52% of magnesium, 1.5% of zinc, 0.15% of antimony, 0.5% of rhenium, 0.07% of tellurium and the balance of aluminum.
In some embodiments, the aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the components in percentage by mass are as follows: 6.2% of silicon, 0.65% of magnesium, 1.8% of zinc, 0.20% of antimony, 0.6% of rhenium, 0.08% of tellurium and the balance of aluminum.
In some embodiments, the aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the compositions in percentage by mass are as follows: 6.2% of silicon, 0.65% of magnesium, 1.8% of zinc, 0.25% of antimony, 0.8% of rhenium, 0.10% of tellurium and the balance of aluminum.
On the other hand, the preparation method of the Al-Si series aluminum alloy liquid comprises the following steps:
1) proportioning raw materials according to the percentage of the aluminum alloy liquid of any one of claims 1 to 5, filling the raw materials which are not easy to oxidize on the upper part of the electric furnace, and heating to 730 ℃ and 740 ℃ for smelting after the electric furnace is filled with the raw materials, wherein the heating speed is 100 ℃/min;
2) when the raw materials in the electric furnace are melted and an oxide film appears, uniformly scattering a powdery covering agent on the surface of the electric furnace, wherein the thickness of the covering agent is 2-4mm, and keeping the heating time for 2-5 min;
3) introducing argon into the electric furnace for protection, skimming the scum on the surface of the electric furnace, then spraying a refining agent through a spraying machine to refine the aluminum alloy liquid in the electric furnace, stirring the aluminum alloy liquid in the electric furnace by adopting a stirring rod, refining for 5-10 minutes at the temperature of 710-720 ℃, then carrying out ultrasonic vibration treatment for 2 minutes, and skimming the scum on the surface of the electric furnace after standing;
4) and (3) injecting the aluminum alloy liquid obtained in the step 3) into a vacuum aluminum water transfer ladle to realize the transportation of the aluminum alloy liquid.
In some embodiments, the covering agent in step 2) adopts potassium chloride and sodium chloride, wherein the molar mass ratio of the potassium chloride to the sodium chloride is 1: 1.
In some embodiments, the refining agent in the step 3) accounts for 0.5-0.7% of the mass of the whole aluminum alloy liquid.
In some embodiments, the aluminum alloy liquid of the vacuum molten aluminum transporting package in the step 4) is used for a workpiece prepared by a semi-solid metal casting process, and the solid fraction of the aluminum alloy liquid is 0.5-0.6 during casting.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the added antimony, rhenium and tellurium can have obvious refining effect on alpha (Al) and eutectic structures, and also have better refining and purifying effects, so that the mechanical property of the alloy can be obviously improved, the effective modification time is long, the elongation of the material is effectively improved, the material obtained by the preparation method of the aluminum alloy liquid can be directly used for semi-solid casting without secondary smelting, the casting forming effect is better, the solidification shrinkage of the casting is reduced, the size precision of the casting is high, the appearance quality is good, the machining amount is reduced, and even the casting without machining allowance can be obtained; the columnar crystal and the coarse dendrite in the conventional casting are eliminated, the casting has fine and compact structure and uniform distribution, and the macrosegregation does not exist; the metal mold filling is stable, free of turbulence and splashing, low in mold filling temperature and capable of prolonging the service life of the mold; the casting process is simplified, the energy consumption is reduced, the labor condition is improved, and the production efficiency is high due to the high solidification speed; further improving the mechanical property of the casting.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are commercially available, and are not indicated by manufacturers.
Example 1
The aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and comprises the following components in percentage by mass: 4.8% of silicon, 0.40% of magnesium, 1.2% of zinc, 0.10% of antimony, 0.2% of rhenium, 0.05% of tellurium and the balance of aluminum.
The preparation method of the Al-Si series aluminum alloy liquid comprises the following steps:
1) proportioning according to the raw material percentage of the aluminum alloy liquid, filling the raw material which is not easy to oxidize at the upper part of the electric furnace, and heating to 730-;
2) when the raw materials in the electric furnace are melted and an oxide film appears, uniformly scattering a powdery covering agent on the surface of the electric furnace, wherein the thickness of the covering agent is 2-4mm, and keeping the heating time for 2-5 min;
3) introducing argon into the electric furnace for protection, skimming the scum on the surface of the electric furnace, then spraying a refining agent through a spraying machine to refine the aluminum alloy liquid in the electric furnace, stirring the aluminum alloy liquid in the electric furnace by adopting a stirring rod, refining for 5-10 minutes at the temperature of 710-720 ℃, then carrying out ultrasonic vibration treatment for 2 minutes, and skimming the scum on the surface of the electric furnace after standing;
4) and (4) injecting the aluminum alloy liquid obtained in the step 3) into a vacuum aluminum water transfer ladle to realize the transportation of the aluminum alloy liquid.
Wherein, the covering agent in the step 2) adopts potassium chloride and sodium chloride, wherein the molar mass ratio of the potassium chloride to the sodium chloride is 1: 1.
In the step 3), the refining agent accounts for 0.5-0.7% of the mass of the whole aluminum alloy liquid.
And 4) applying the aluminum alloy liquid of the vacuum aluminum water transfer ladle in the step 4) to a workpiece prepared by adopting a semi-solid metal casting process, wherein the solid phase ratio of the aluminum alloy liquid is 0.5-0.6 during casting.
Example 2
The aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and comprises the following components in percentage by mass: 5.5% of silicon, 0.52% of magnesium, 1.5% of zinc, 0.15% of antimony, 0.5% of rhenium, 0.07% of tellurium and the balance of aluminum.
The preparation method of the Al-Si series aluminum alloy liquid comprises the following steps:
1) proportioning according to the raw material percentage of the aluminum alloy liquid, filling the raw material which is not easy to oxidize at the upper part of the electric furnace, and heating to 730-;
2) when the raw materials in the electric furnace are melted and an oxide film appears, uniformly scattering a powdery covering agent on the surface of the electric furnace, wherein the thickness of the covering agent is 2-4mm, and keeping the heating time for 2-5 min;
3) introducing argon into the electric furnace for protection, removing scum on the surface of the electric furnace, spraying a refining agent through a spraying machine to refine the aluminum alloy liquid in the electric furnace, stirring the aluminum alloy liquid in the electric furnace by using a stirring rod, refining for 5-10 minutes at the temperature of 710-;
4) and (3) injecting the aluminum alloy liquid obtained in the step 3) into a vacuum aluminum water transfer ladle to realize the transportation of the aluminum alloy liquid.
Wherein, the covering agent in the step 2) adopts potassium chloride and sodium chloride, wherein the molar mass ratio of the potassium chloride to the sodium chloride is 1: 1.
In the step 3), the refining agent accounts for 0.5-0.7% of the mass of the whole aluminum alloy liquid.
And 4) applying the aluminum alloy liquid of the vacuum aluminum water transfer ladle in the step 4) to a workpiece prepared by adopting a semi-solid metal casting process, wherein the solid phase ratio of the aluminum alloy liquid is 0.5-0.6 during casting.
Example 3
The aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and comprises the following components in percentage by mass: 6.2% of silicon, 0.65% of magnesium, 1.8% of zinc, 0.20% of antimony, 0.6% of rhenium, 0.08% of tellurium and the balance of aluminum.
The preparation method of the Al-Si series aluminum alloy liquid comprises the following steps:
1) proportioning according to the raw material percentage of the aluminum alloy liquid, filling the raw material which is not easy to oxidize at the upper part of the electric furnace, and heating to 730-;
2) when the raw materials in the electric furnace are melted and an oxide film appears, uniformly scattering a powdery covering agent on the surface of the electric furnace, wherein the thickness of the covering agent is 2-4mm, and keeping the heating time for 2-5 min;
3) introducing argon into the electric furnace for protection, removing scum on the surface of the electric furnace, spraying a refining agent through a spraying machine to refine the aluminum alloy liquid in the electric furnace, stirring the aluminum alloy liquid in the electric furnace by using a stirring rod, refining for 5-10 minutes at the temperature of 710-;
4) and (4) injecting the aluminum alloy liquid obtained in the step 3) into a vacuum aluminum water transfer ladle to realize the transportation of the aluminum alloy liquid.
Wherein, the covering agent in the step 2) adopts potassium chloride and sodium chloride, wherein the molar mass ratio of the potassium chloride to the sodium chloride is 1: 1.
In the step 3), the refining agent accounts for 0.5-0.7% of the mass of the whole aluminum alloy liquid.
And 4) applying the aluminum alloy liquid of the vacuum aluminum water transfer ladle in the step 4) to a workpiece prepared by adopting a semi-solid metal casting process, wherein the solid phase ratio of the aluminum alloy liquid is 0.5-0.6 during casting.
Example 4
The aluminum alloy liquid consists of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and comprises the following components in percentage by mass: 6.2% of silicon, 0.65% of magnesium, 1.8% of zinc, 0.25% of antimony, 0.8% of rhenium, 0.10% of tellurium and the balance of aluminum.
The preparation method of the Al-Si series aluminum alloy liquid comprises the following steps:
1) proportioning according to the raw material percentage of the aluminum alloy liquid, filling the raw material which is not easy to oxidize at the upper part of the electric furnace, and heating to 730-;
2) when the raw materials in the electric furnace are melted and an oxide film appears, uniformly scattering a powdery covering agent on the surface of the electric furnace, wherein the thickness of the covering agent is 2-4mm, and keeping the heating time for 2-5 min;
3) introducing argon into the electric furnace for protection, removing scum on the surface of the electric furnace, spraying a refining agent through a spraying machine to refine the aluminum alloy liquid in the electric furnace, stirring the aluminum alloy liquid in the electric furnace by using a stirring rod, refining for 5-10 minutes at the temperature of 710-;
4) and (3) injecting the aluminum alloy liquid obtained in the step 3) into a vacuum aluminum water transfer ladle to realize the transportation of the aluminum alloy liquid.
Wherein, the covering agent in the step 2) adopts potassium chloride and sodium chloride, wherein the molar mass ratio of the potassium chloride to the sodium chloride is 1: 1.
In the step 3), the refining agent accounts for 0.5-0.7% of the mass of the whole aluminum alloy liquid.
And 4) applying the aluminum alloy liquid of the vacuum aluminum water transfer ladle in the step 4) to a workpiece prepared by adopting a semi-solid metal casting process, wherein the solid phase ratio of the aluminum alloy liquid is 0.5-0.6 during casting.
Examples of the experiments
Mechanical properties of the workpieces manufactured by the semi-solid metal casting process using the aluminum alloy liquid obtained in examples 1 to 4 and the conventional Al — Si aluminum alloy workpiece having alloy No. ZL101 were tested, in which a tensile test was performed according to the specification of GB/T228.1 and a hardness test was performed according to the specification of GB/T231.1.
The results of the experiment are shown in the following table:
compared with the existing Al-Si aluminum alloy of ZL101, the Al-Si aluminum alloy liquid has the advantages that the mechanical property is obviously improved, certain mechanical strength is ensured, the elongation is higher, and the semi-solid aluminum alloy liquid is more favorable for casting.
The added antimony, rhenium and tellurium can have obvious refining effect on alpha (Al) and eutectic structures, and also have better refining and purifying effects, so that the mechanical property of the alloy can be obviously improved, the effective modification time is long, the elongation of the material is effectively improved, the material obtained by the preparation method of the aluminum alloy liquid can be directly used for semi-solid casting without secondary smelting, the casting forming effect is better, the solidification shrinkage of the casting is reduced, the size precision of the casting is high, the appearance quality is good, the machining amount is reduced, and even the casting without machining allowance can be obtained; the columnar crystal and the coarse dendrite in the conventional casting are eliminated, the casting has fine and compact structure and uniform distribution, and the macrosegregation does not exist; the metal mold filling is stable, free of turbulence and splashing, low in mold filling temperature and capable of prolonging the service life of the mold; the casting process is simplified, the energy consumption is reduced, the labor condition is improved, and the solidification speed is high, so that the production efficiency is high; further improving the mechanical property of the casting.
Although specific embodiments of the invention have been described in detail, those skilled in the art will appreciate. Various modifications and substitutions of those details may be made in light of the overall teachings of the disclosure, and such changes are intended to be within the scope of the present invention. The full scope of the invention is given by the appended claims and any equivalents thereof.
Claims (9)
1. An Al-Si series aluminum alloy liquid is characterized by comprising silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the components in percentage by mass are as follows: 4.8 to 6.2 percent of silicon, 0.40 to 0.65 percent of magnesium, 1.2 to 1.8 percent of zinc, 0.10 to 0.25 percent of stibium, 0.2 to 0.8 percent of rhenium, 0.05 to 0.10 percent of tellurium and the balance of aluminum.
2. The Al-Si series aluminum alloy liquid according to claim 1, wherein the aluminum alloy liquid is composed of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the composition is, in terms of mass percent: 4.8% of silicon, 0.40% of magnesium, 1.2% of zinc, 0.10% of antimony, 0.2% of rhenium, 0.05% of tellurium and the balance of aluminum.
3. The Al-Si series aluminum alloy liquid according to claim 1, wherein the aluminum alloy liquid is composed of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the composition is, in terms of mass percent: 5.5% of silicon, 0.52% of magnesium, 1.5% of zinc, 0.15% of antimony, 0.5% of rhenium, 0.07% of tellurium and the balance of aluminum.
4. The Al-Si series aluminum alloy liquid according to claim 1, wherein the aluminum alloy liquid is composed of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the composition is, in terms of mass percent: 6.2% of silicon, 0.65% of magnesium, 1.8% of zinc, 0.20% of antimony, 0.6% of rhenium, 0.08% of tellurium and the balance of aluminum.
5. The Al-Si series aluminum alloy liquid according to claim 1, wherein the aluminum alloy liquid is composed of silicon, magnesium, zinc, antimony, rhenium, tellurium and aluminum, and the composition is, in terms of mass percent: 6.2% of silicon, 0.65% of magnesium, 1.8% of zinc, 0.25% of antimony, 0.8% of rhenium, 0.10% of tellurium and the balance of aluminum.
6. A preparation method of Al-Si series aluminum alloy liquid is characterized by comprising the following steps:
1) proportioning raw materials according to the percentage of the aluminum alloy liquid of any one of claims 1 to 5, filling the raw materials which are not easy to oxidize on the upper part of the electric furnace, and heating to 730 ℃ and 740 ℃ for smelting after the electric furnace is filled with the raw materials, wherein the heating speed is 100 ℃/min;
2) when the raw materials in the electric furnace are melted and an oxide film appears, uniformly scattering a powdery covering agent on the surface of the electric furnace, wherein the thickness of the covering agent is 2-4mm, and keeping the heating time for 2-5 min;
3) introducing argon into the electric furnace for protection, skimming the scum on the surface of the electric furnace, then spraying a refining agent through a spraying machine to refine the aluminum alloy liquid in the electric furnace, stirring the aluminum alloy liquid in the electric furnace by adopting a stirring rod, refining for 5-10 minutes at the temperature of 710-720 ℃, then carrying out ultrasonic vibration treatment for 2 minutes, and skimming the scum on the surface of the electric furnace after standing;
4) and (3) injecting the aluminum alloy liquid obtained in the step 3) into a vacuum aluminum water transfer ladle to realize the transportation of the aluminum alloy liquid.
7. The method of producing an Al-Si based aluminum alloy liquid according to claim 6, wherein the covering agent in the step 2) is potassium chloride and sodium chloride, and a molar mass ratio of potassium chloride to sodium chloride is 1: 1.
8. The method of producing an Al-Si based aluminum alloy liquid according to claim 6, wherein the refining agent in the step 3) accounts for 0.5 to 0.7% by mass of the entire aluminum alloy liquid.
9. The method for preparing Al-Si series aluminum alloy liquid according to claim 6, wherein the aluminum alloy liquid of the vacuum molten aluminum transporting ladle in the step 4) is used for a workpiece prepared by a semi-solid metal casting process, and the solid fraction of the aluminum alloy liquid is 0.5 to 0.6 during casting.
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| CN104561690A (en) * | 2015-01-26 | 2015-04-29 | 上海交通大学 | High-plasticity cast aluminum alloy and extrusion casting preparation method thereof |
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