CN108179329B - Method for improving microalloying effect of rare earth elements in cast aluminum-silicon alloy - Google Patents
Method for improving microalloying effect of rare earth elements in cast aluminum-silicon alloy Download PDFInfo
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- CN108179329B CN108179329B CN201711260156.3A CN201711260156A CN108179329B CN 108179329 B CN108179329 B CN 108179329B CN 201711260156 A CN201711260156 A CN 201711260156A CN 108179329 B CN108179329 B CN 108179329B
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- 229910000676 Si alloy Inorganic materials 0.000 title claims abstract description 35
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 title claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- 239000010703 silicon Substances 0.000 claims abstract description 26
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 23
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 23
- 239000011777 magnesium Substances 0.000 claims abstract description 23
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 11
- 239000010936 titanium Substances 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011812 mixed powder Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000011164 primary particle Substances 0.000 claims abstract description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- 229910052746 lanthanum Inorganic materials 0.000 claims description 8
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims 1
- 229910018138 Al-Y Inorganic materials 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- ZWOQODLNWUDJFT-UHFFFAOYSA-N aluminum lanthanum Chemical compound [Al].[La] ZWOQODLNWUDJFT-UHFFFAOYSA-N 0.000 description 5
- RFEISCHXNDRNLV-UHFFFAOYSA-N aluminum yttrium Chemical compound [Al].[Y] RFEISCHXNDRNLV-UHFFFAOYSA-N 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 238000004321 preservation Methods 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- VRAIHTAYLFXSJJ-UHFFFAOYSA-N alumane Chemical compound [AlH3].[AlH3] VRAIHTAYLFXSJJ-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum-silicon-yttrium Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005551 mechanical alloying Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
Classifications
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- 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
-
- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
- C22F1/043—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 of alloys with silicon as the next major constituent
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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)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A method for improving the microalloying effect of rare earth elements in cast aluminum-silicon alloy is characterized by comprising the following steps: firstly, controlling the primary particle size of silicon, magnesium and titanium powder added into molten aluminum in the preparation process of casting aluminum-silicon alloy to be 10-20 mu m; secondly, adding silicon, magnesium and titanium powder in batches after mixing, preserving heat when the temperature is respectively raised to 720 ℃, 740 ℃ and 760 ℃, then respectively adding 40%, 40% and 20% of the silicon, magnesium and titanium mixed powder at constant temperature, stirring for 5-10 minutes each time, and then continuing to raise the temperature; thirdly, adding rare earth elements after the last batch of silicon, magnesium and titanium mixed powder is added and the temperature is kept for 10 minutes. The cast aluminum-silicon alloy prepared by the invention realizes better consideration of high conductivity and high strength, and the conductivity of the cast aluminum-silicon alloy is maintained at 40% IACS and above while the tensile strength is not lower than 340 MPa.
Description
Technical Field
The invention belongs to the technical field of cast aluminum alloy, and relates to a microalloying method for cast aluminum-silicon alloy, in particular to a method for improving the microalloying effect of rare earth elements in cast aluminum-silicon alloy.
Background
Cast aluminum-silicon alloy is one of the most commonly used electrical materials in the electrical appliance industry at present. With the continuous development of the cast aluminum electrical components towards miniaturization and light weight, the structure of the cast aluminum electrical components presents the characteristics of thin wall, special shape, complexity and the like, and not only the cast aluminum-silicon alloy has high requirements on the strength, but also the cast aluminum-silicon alloy has higher and higher requirements on the conductivity.
For example, the rare earth lanthanum-alloyed aluminum-silicon alloy and the preparation method thereof proposed by kukomo et al of the university of south chang in patent CN103469027A control the silicon content in the aluminum-silicon alloy to 9.0 ~ 13.5.5%, and add 0.08 ~ 0.45.45% lanthanum as simple substance lanthanum or aluminum-lanthanum intermediate alloy at 770 ~ 790 ℃ and keep the temperature for 5 ~ 8 minutes and then perform intermittent ultrasonic treatment, which proves that the addition of the rare earth lanthanum can effectively improve the mechanical properties and the corresponding conductivity of the aluminum alloy, and for example, luguanghua et al in the paper "research on the structure and performance of multicomponent composite microalloyed aluminum alloy" propose that the addition of 0.15wt% La and 0.20wt% Y by compounding, and refine the crystal grains in the alloy by T6 heat treatment, which improves the hardness and conductivity of the cast aluminum-silicon alloy, however, the aluminum-silicon alloy obtained by these methods still meets the requirements of more and more stringent mechanical casting voltage, and is not easy to be added to be subjected to the remelting, and is not suitable for the problem of the casting of the extra-high electrical and is often caused by the additional mechanical melting and remelting of the added elements.
According to literature reference, no effective method for improving the microalloying effect of rare earth elements in cast aluminum-silicon alloy is available at present, and the application of the cast aluminum-silicon alloy in high-voltage-grade cast aluminum electrical components is limited to a certain extent.
Disclosure of Invention
The invention aims to provide a method for improving the rare earth element micro-alloying effect in cast aluminum-silicon alloy aiming at the problem that the conductivity and strength of the cast aluminum-silicon alloy are difficult to meet the use requirements of high-voltage-grade cast aluminum electrical components because the added rare earth element cannot achieve the expected micro-alloying effect at present.
The technical scheme of the invention is as follows:
a method for improving the microalloying effect of rare earth elements in cast aluminum-silicon alloy is characterized by comprising the following steps: firstly, controlling the primary particle size of silicon, magnesium and titanium powder added in molten aluminum in the preparation process of casting aluminum-silicon alloy to be 10-20 mu m; secondly, adding silicon, magnesium and titanium powder in batches after mixing, preserving heat when the temperature is respectively raised to 720 ℃, 740 ℃ and 760 ℃, then respectively adding 40%, 40% and 20% of the silicon, magnesium and titanium mixed powder at constant temperature, stirring for 5-10 minutes each time, and then continuing to raise the temperature; thirdly, adding rare earth elements after the last batch of silicon, magnesium and titanium mixed powder is added and the temperature is kept for 10 minutes.
The mass percentages of the added silicon, magnesium and titanium in the whole aluminum-silicon alloy casting are 6.5-7.0% of silicon, 0.3-0.4% of magnesium and 0.1 ~ 0.2.2% of titanium.
The added silicon, magnesium and titanium powder is preferably mixed by a ball milling method, and the ball milling parameters are conventional parameters.
The types and the contents of the added rare earth elements account for 0.1-0.2% of lanthanum and 0.1-0.2% of yttrium in the whole aluminum-silicon alloy casting by mass percent.
The added rare earth elements are added in the form of aluminum lanthanum intermediate alloy and aluminum yttrium intermediate alloy.
Argon is introduced into the casting aluminum-silicon alloy in the whole preparation process for protection.
After the cast aluminum-silicon alloy is formed, T6 heat treatment is used in a matching mode, namely solution treatment at 530 +/-5 ℃ and with heat preservation time of 6h and water cooling at 80 +/-5 ℃ and aging treatment at 150 +/-5 ℃ and with heat preservation time of 5h and air cooling.
The invention has the beneficial effects that:
1. according to the invention, by controlling the original grain sizes of the silicon, magnesium and titanium powder and adopting a batch component adding method and the like, the original structure components of the aluminum-silicon alloy are more uniform, the effective exertion of the microalloying effect of the rare earth elements is facilitated, the impurities in the cast aluminum-silicon alloy are reduced, the prepared microalloyed aluminum-silicon alloy of the rare earth elements realizes better high conductivity and high strength, and the conductivity is maintained at 40% IACS or above while the tensile strength is not lower than 340 MPa.
2. The cast aluminum electrical component produced by the method of the invention obviously improves the internal defects of the casting due to the enhancement of the rare earth micro-alloying effect.
3. The invention can be used for manufacturing cast aluminum parts such as conductors, circuit breakers and the like in ultra-high voltage gas insulated fully-closed combined electrical appliances, and obviously reduces the dependence of the products on foreign countries.
Detailed Description
The present invention is further described with reference to the following examples, which are not intended to limit the present invention, and those skilled in the art can make various modifications or improvements based on the basic idea of the present invention, but within the scope of the present invention as long as they do not depart from the basic idea of the present invention.
A method for improving the microalloying effect of rare earth elements in cast aluminum-silicon alloy comprises the steps of firstly controlling the original grain diameter of silicon, magnesium and titanium powder added in aluminum liquid in the process of casting aluminum-silicon alloy preparation to be 10-20 mu m, wherein the mass fraction of silicon, magnesium and titanium is 6.5-7.0%, 0.3-0.4% and 0.1 ~.2%, secondly, mixing the silicon, magnesium and titanium powder (preferably by a ball milling method, so that a certain degree of mechanical alloying effect is achieved on the basis of ensuring uniform mixing), then adding the silicon, magnesium and titanium powder in batches, keeping the temperature when the temperature is respectively raised to 720 ℃ and 740 ℃, keeping the temperature when the temperature is respectively raised to be 740 ℃, then respectively adding 40%, 40% and 20% of silicon, magnesium and titanium mixed powder at a constant temperature, continuously raising the temperature after stirring for 5-10 minutes each time, thirdly, adding rare earth elements in the form of aluminum-lanthanum intermediate alloy and aluminum-yttrium after the last batch of silicon, keeping the mixed powder at the constant temperature and keeping the temperature for 5-10 minutes, and keeping the contents of silicon, lanthanum and lanthanum in the aluminum-silicon-yttrium to be respectively 0.84 ℃, keeping the heat treatment time of aluminum-0.84 ℃ and keeping the conductivity of aluminum-0.5% of aluminum-2% of aluminum-0.5% of aluminum-0.4% of aluminum-5% of aluminum-2% of aluminum-aluminum.
The following table shows the cast aluminum-silicon alloy prepared according to the method of the present invention and its measured performance index.
In specific implementation, the aluminum-lanthanum intermediate alloy and the aluminum-yttrium intermediate alloy can be directly purchased from the market, and can also be prepared by the aluminum-lanthanum intermediate alloy adopting Al-10La and the aluminum-yttrium intermediate alloy adopting Al-5Y.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (5)
1. A method for improving the microalloying effect of rare earth elements in cast aluminum-silicon alloy is characterized by comprising the following steps: firstly, controlling the primary particle size of silicon, magnesium and titanium powder added into aluminum liquid in the preparation process of casting aluminum-silicon alloy to be 10-20 mu m; secondly, adding silicon, magnesium and titanium powder in batches after mixing, preserving heat when the temperature is respectively raised to 720 ℃, 740 ℃ and 760 ℃, then respectively adding 40%, 40% and 20% of the silicon, magnesium and titanium mixed powder at a constant temperature, and continuously raising the temperature after stirring for 5-10 minutes each time; thirdly, adding rare earth elements after the last batch of silicon, magnesium and titanium mixed powder is added and the temperature is kept for 10 minutes; the types of the rare earth elements and the mass percentages of the rare earth elements in the aluminum-silicon alloy are 0.1-0.2% of lanthanum and 0.1-0.2% of yttrium; and argon is introduced for protection in the whole preparation process.
2. The method according to claim 1, wherein the silicon, magnesium and titanium are added in an amount of 6.5 to 7.0% by mass, 0.3 to 0.4% by mass and 0.1 to 0.1 ~ 0.2.2% by mass based on the aluminum-silicon alloy.
3. The method as set forth in claim 1, wherein the added silicon, magnesium and titanium powder mixture is prepared by a ball milling method.
4. The method as set forth in claim 1, wherein the rare earth element is added in the form of an Al-La master alloy or an Al-Y master alloy.
5. The method according to claim 1, wherein the cast Al-Si alloy is shaped and then heat treated using T6, i.e. solution treatment with water cooling at 530 + -5 ℃ for 6 hours, at 80 + -5 ℃ and aging treatment with air cooling at 150 + -5 ℃ for 5 hours.
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| CN201711260156.3A CN108179329B (en) | 2017-12-04 | 2017-12-04 | Method for improving microalloying effect of rare earth elements in cast aluminum-silicon alloy |
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| CN108179329B true CN108179329B (en) | 2020-01-03 |
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| CN112143945B (en) * | 2020-09-23 | 2021-12-17 | 上海耀鸿科技股份有限公司 | High-strength and high-toughness cast aluminum-silicon alloy containing multiple composite rare earth elements and preparation method thereof |
| CN112941376A (en) * | 2021-01-26 | 2021-06-11 | 佛山职业技术学院 | Alloy conductor material and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545061A (en) * | 2009-04-30 | 2009-09-30 | 武汉泛洲中越合金有限公司 | Multivariate interalloy and smelting method thereof |
| CN103789582A (en) * | 2014-01-09 | 2014-05-14 | 马鞍山市恒毅机械制造有限公司 | Special aluminium-silicon-magnesium alloy material for car wheel hubs and preparation method thereof |
| CN104946940A (en) * | 2014-03-27 | 2015-09-30 | 比亚迪股份有限公司 | Die casting aluminum alloy and preparation method thereof |
| CN105543586A (en) * | 2016-03-08 | 2016-05-04 | 北京工业大学 | Er-containing cast aluminum-silicon alloy with high impact toughness |
| CN106834818A (en) * | 2017-03-20 | 2017-06-13 | 中信戴卡股份有限公司 | A kind of aluminum alloy materials and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050199318A1 (en) * | 2003-06-24 | 2005-09-15 | Doty Herbert W. | Castable aluminum alloy |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545061A (en) * | 2009-04-30 | 2009-09-30 | 武汉泛洲中越合金有限公司 | Multivariate interalloy and smelting method thereof |
| CN103789582A (en) * | 2014-01-09 | 2014-05-14 | 马鞍山市恒毅机械制造有限公司 | Special aluminium-silicon-magnesium alloy material for car wheel hubs and preparation method thereof |
| CN104946940A (en) * | 2014-03-27 | 2015-09-30 | 比亚迪股份有限公司 | Die casting aluminum alloy and preparation method thereof |
| CN105543586A (en) * | 2016-03-08 | 2016-05-04 | 北京工业大学 | Er-containing cast aluminum-silicon alloy with high impact toughness |
| CN106834818A (en) * | 2017-03-20 | 2017-06-13 | 中信戴卡股份有限公司 | A kind of aluminum alloy materials and preparation method thereof |
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