CN108559875B - High-strength heat-resistant aluminum alloy material for engine piston and preparation method thereof - Google Patents
High-strength heat-resistant aluminum alloy material for engine piston and preparation method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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Abstract
The invention provides a high-strength heat-resistant aluminum alloy material for an engine piston, which consists of the following elements in percentage by weight: 0.2 to 2 percent of zirconium Zr, 6 to 13 percent of yttrium Y, 0.5 to 3 percent of iron Fe, 0.8 to 2 percent of silicon Si, 0.1 to 0.3 percent of magnesium Mg0.05 to 0.08 percent of titanium Ti, 0.01 to 0.15 percent of boron B and the balance of Al. The invention also provides a preparation method of the high-strength heat-resistant aluminum alloy material for the engine piston. The heat-resistant aluminum alloy has good casting performance and mechanical property, and the tensile strength reaches 330 MPa. The material also has good heat resistance, and a heat resistance experiment shows that after the material is heated for 1 hour at 280 ℃, the strength does not decrease and increase reversely; after heating at 400 ℃ for 1 hour, the strength remained unchanged.
Description
Technical Field
The invention relates to a heat-resistant aluminum alloy for an automobile engine piston, in particular to a high-strength heat-resistant aluminum alloy piston material and a preparation method thereof, and belongs to the field of automobile engine manufacturing.
Background
The aluminum alloy has the excellent characteristics of small density, high specific strength, good elasticity, good impact resistance, corrosion resistance, high heat conductivity, easy surface coloring, recoverability and the like, and is widely applied to the industries of aerospace, transportation, energy power and the like. Particularly, in the automobile industry, with the development of automobile lightweight technology, the high-performance aluminum alloy is used for replacing the traditional cast iron part in the automobile, and is the main means for the lightweight of the automobile at present. The working temperature of the piston of the automobile engine generally requires more than 230 ℃, and the piston must have good impact toughness and fatigue performance. Therefore, the development of a high-temperature resistant aluminum alloy material is urgently needed to meet the performance requirements of the piston of the automobile engine.
Through search, the application number is 201310348355.5, the patent discloses an aluminum alloy for engine pistons and a preparation method thereof, and the aluminum alloy comprises the following elements in percentage by mass: si8.5-12.5, Cu1.8-2.4, Mg0.6-1.2, Ni1.2-1.6, Zn0.15-0.25, Mn0.1-0.2, Zr0.4-0.8, Cr0.05-0.1, Fe0.03-0.05, Ti0.04-0.08, B0.01-0.02, Li0.025-0.035, In0.02-0.03, Bi0.015-0.025, La0.04-0.06, Tm0.02-0.04, and the rest is aluminum. The patent takes Si, Cu, Ni, Mg and the like as main alloying elements, and B, Li, In, Bi, La, Tm and the like as micro alloying elements, plays the role of each element, realizes the alloying effect, improves the mechanical strength, the wear resistance, the high temperature, the dimensional stability and other properties of the alloy, and can meet the requirements of a high-power engine piston on piston materials with higher mechanical load and thermal load.
However, the components of the above patents are complex, and the components of the patents cannot be well controlled in large-scale industrial production, which increases the operation difficulty of actual production. In addition, complex interactions between the elements often occur, and the composition fluctuation has an unpredictable effect on the performance of the material. In addition, the main added elements are Si, Cu, Mg, Ni and Zr, and the principle is that the strength of the material is further improved by precipitation strengthening generated by heat treatment. Since the precipitation strengthening effect of Mg and Si is unstable at high temperatures and is liable to decompose, Zr element is added to further improve the heat resistance of the alloy. However, Zr is likely to be severely segregated in Al to form a segregation-free zone, which adversely affects mechanical properties.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-strength heat-resistant aluminum alloy material for an engine piston and a preparation method thereof, wherein the aluminum alloy has good casting performance, mechanical property and heat resistance.
According to one aspect of the invention, a high-strength heat-resistant aluminum alloy material for an engine piston is provided, which comprises the following elements in percentage by weight: 0.2 to 2 percent of zirconium Zr, 6 to 13 percent of yttrium Y, 0.5 to 3 percent of iron Fe, 0.8 to 2 percent of silicon Si, 0.1 to 0.3 percent of magnesium Mg0.05 to 0.08 percent of titanium Ti, 0.01 to 0.015 percent of boron B and the balance of Al.
Preferably, the aluminum alloy material consists of the following elements in percentage by weight: 1 to 2 percent of zirconium Zr, 10 to 13 percent of yttrium Y, 2 to 3 percent of iron Fe, 0.8 to 2 percent of silicon Si, 0.1 to 0.3 percent of magnesium Mg0.05 to 0.08 percent of titanium Ti, 0.01 to 0.15 percent of boron B and the balance of Al.
According to another aspect of the invention, a preparation method of the high-strength heat-resistant aluminum alloy material for the engine piston is provided, and the method comprises the following steps: preparing alloy raw materials according to a stoichiometric ratio, putting the raw materials into a smelting furnace, heating, degassing and smelting, slagging, removing slag, and finally pouring to form a Y-shaped ingot.
Specifically, the method comprises the following steps:
putting an industrial pure aluminum ingot into a smelting furnace for melting, and controlling the temperature of aluminum liquid to be between 720 and 750 ℃;
adding Al-Zr intermediate alloy, Al-Y intermediate alloy, Al-Fe intermediate alloy, Al-Si intermediate alloy, Al-Mg intermediate alloy and Al-Ti-B intermediate alloy refiner into the aluminum liquid, standing, and fully stirring the aluminum liquid to ensure that the components are uniform;
then controlling the temperature of the aluminum liquid at 720-750 ℃, deslagging, degassing and refining;
and after refining treatment, removing slag on the surface of the aluminum by using a slag removing rake, pouring the slag into a mold to obtain an alloy ingot, and performing heat treatment on the alloy ingot at the temperature of 280-550 ℃ to obtain the high-strength heat-resistant aluminum alloy material.
Preferably, each of the above-mentioned added master alloys has at least one of the following characteristics:
-said Al-Zr master alloy, wherein the content of Zr is 6.54 wt.%;
-said Al-Y master alloy, wherein the content of Y is 20 wt.%;
-said Al-Fe master alloy, wherein the content of Fe is 20 wt.%;
-said Al-Si master alloy, wherein the content of Si is 10 wt.%;
-said Al-Mg master alloy, wherein the content of Mg is 5 wt.%.
Preferably, the Al-Ti-B intermediate alloy refiner is Al-5Ti-1B intermediate alloy refiner, wherein the mass percentage is.
Preferably, the mold can be a Y-shaped graphite mold, and the mold is dried in a drying furnace at 300 ℃ in advance.
Preferably, the heat treatment time is 6-15 h.
Preferably, the heat treatment means: performing a heat treatment in a heat treatment furnace, wherein: the temperature range of the solution heat treatment is 500-550 ℃, the time is 3-6 hours, the temperature range of the aging heat treatment is 280-330 ℃, and the time is 4-6 hours.
Preferably, the standing time is 30 minutes or more.
Preferably, the aluminum ingot has a purity of 99.7% or more.
The iron content of conventional aluminum alloys is generally strictly controlled because iron forms Al with aluminum3Fe and other brittle iron phases with needle-like morphology cause stress concentration in the matrix, and reduce the processability and mechanical properties. However, the iron phase tends to have excellent heat resistance. 0.5-3 wt.% of Fe is added into the alloy, and the shape of the iron phase is changed from needle shape to Chinese character shape by utilizing the modification effect of rare earth Y on the iron phase. Therefore, the alloy disclosed by the invention has high strength, good mechanical property and heat resistance.
In the aluminum alloy material, Zr element mainly plays a role in refining the interlayer spacing of Al-Y eutectic crystal and improving Al3The effect of heat resistance of the Y eutectic phase.
The Mg and Si added in the invention not only form solid solution strengthening in aluminum matrix and aging strengthening after heat treatment, but also combine with Al, Y and Si elements to form complex heat-resistant phase.
More specifically, the material of the invention utilizes eutectic reaction of rare earth Y and Al to form α -Al3Y binary eutectic structure. Al in as-cast alloy11Ce3The phase has extremely high thermal stability and, in addition, due to the presence of a large amount of Al in its structure3The Y intermetallic compound greatly improves the strength and the wear resistance of the material. The material still has higher strength and heat resistance even if the subsequent heat treatment is not carried out. Zr is mainly distributed in the intermetallic compound in the material, and the addition of Zr refines the eutectic lamellar spacing, so that no obvious segregation phenomenon exists.
In addition, the invention is characterized in that 0.5-3% of Fe is added. It is known that Fe is a harmful impurity element in aluminum alloy, and forms a brittle needle-like phase with Al, and when Si, Cu, Ni and other elements are contained in the aluminum alloy, the composition and morphology of the iron phase become more complex. However, in actual industrial production, because the cost of the primary aluminum ingot is high, a large amount of secondary aluminum ingots or secondary aluminum ingots are generally used. And the secondary aluminum ingot contains higher Fe content. However, Fe can improve the heat resistance in the aluminum alloy, refine the crystal grains of the aluminum alloy and change harmful Fe element into alloy element, which is another innovation point of the invention. The rare earth is a surface active element and an excellent alterant, so the rare earth Y can change the iron phase form from a harmful needle-like phase to a Chinese character form, thereby improving the mechanical property of the rare earth.
Furthermore, the invention simultaneously considers the casting performance of the material. Because the Al-Y binary eutectic reaction occurs at about 640 ℃, the temperature is obviously higher than the eutectic reaction temperature of Al-Si series alloy. Theoretical calculation and experiments prove that a large amount of solidification latent heat is released due to the Al-Y binary eutectic reaction, and the high eutectic temperature and the solidification latent heat are beneficial to the metal liquid to have good fluidity, so that the casting performance of the material is ensured.
Another significant feature of the present invention is that Y is the current most cost effective, lightweight rare earth element. The automobile light-weight automobile accords with the development trend of the current automobile light-weight.
Compared with the prior art, the invention has the following beneficial effects:
1. the high-strength heat-resistant aluminum alloy material provided by the invention has good casting performance, the casting performance of the material is evaluated through a thermal cracking test, and industrial X-rays show that the casting structure does not contain obvious defects, so that the series of materials are proved to have good casting performance. The good casting performance of the invention comes from a large amount of solidification latent heat released when Al-Y forms eutectic, and the rare earth element can reduce the surface tension of the liquid surface, thereby improving the fluidity and the mold filling capability of the aluminum liquid.
2. The high-strength heat-resistant aluminum alloy material is used as an automobile engine piston, so that the service life of an automobile engine can be greatly prolonged. The engine piston prepared by the material through one-step casting molding technology can greatly shorten the time of heat treatment and improve the production efficiency.
3. The piston of the engine cast by the material can use industrial secondary aluminum (usually containing a certain amount of Fe and Si impurities), and the utilization rate of resources is improved.
In conclusion, the invention provides the rare earth yttrium alloyed high-strength heat-resistant aluminum alloy piston material, the heat-resistant aluminum alloy has good casting performance and mechanical property, and the tensile strength reaches 330 MPa. The material also has good heat resistance, and a heat resistance experiment shows that after the material is heated for 1 hour at 280 ℃, the strength does not decrease and increase reversely; after heating at 400 ℃ for 1 hour, the strength remained unchanged. The material can stably run for at least 30 years at 210 ℃, and the heat resistance of the material is obviously superior to that of the Al-Si hypereutectic alloy adopted by the existing aluminum alloy piston.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The high-strength heat-resistant aluminum alloy material for the engine piston in the embodiment comprises the following elements in percentage by weight: 0.2% of Zr, 8% of Y, 0.5% of Fe0, 0.1% of Mg0.8% of Si, 0.05% of Ti0.01% of B and the balance of Al.
The high-strength heat-resistant aluminum alloy material for the engine piston comprises the following steps:
selecting Al99.7 percent of industrial pure aluminum, placing the industrial pure aluminum in a smelting furnace to be molten into aluminum liquid, and heating the aluminum liquid to 720-750 ℃;
respectively weighing intermediate alloys according to the formula of 0.2 percent of Zr, 0.5 percent of Y8 percent of Fe0.5 percent of Mg0.1 percent of Si, 0.8 percent of Ti0.05 percent of Si and 0.01 percent of B and putting the intermediate alloys into aluminum liquid; after standing for 30 minutes, fully stirring the aluminum liquid by using a graphite rod to ensure that the components are uniform;
controlling the temperature of the aluminum liquid to be about 730 ℃, deslagging, degassing and refining the melt by using high-purity argon to obtain aluminum alloy liquid, and pouring the aluminum alloy liquid into a Y-shaped graphite mold and a hot cracking test mold, wherein the Y-shaped graphite mold is dried in a drying furnace at 300 ℃ in advance.
The defects of the castings are detected by industrial X-rays, and then the castings are subjected to heat treatment in a heat treatment furnace, wherein the solution heat treatment temperature is 500 ℃ and the time is 3 hours, and the aging heat treatment temperature is 280 ℃ and the time is 4 hours.
On the one hand, the high-strength heat-resistant aluminum alloy material for the engine piston prepared by the embodiment is Al3The Y binary intermetallic compound has better heat resistance and the function of strengthening the aluminum alloy, and improves the strength and the heat resistance of the material. On the other hand, Mg and Si play a role in solid solution and aging strengthening, and the strength of the material is further improved. The X-ray results show that the casting has no obvious defects. The tensile strength is 250MPa, and the strength does not decrease and inversely increases after the heating is carried out for 1 hour at 280 ℃; after heating at 400 ℃ for 1 hour, the strength residual rate reached 95%.
Example 2
The high-strength heat-resistant aluminum alloy material for the engine piston in the embodiment comprises the following elements in percentage by weight: 0.4% of Zr, 10% of Y, 1% of Fe, 0.2% of Mg0.2%, 1% of Si, 0.06% of Ti0.012% of B and the balance of Al.
The high-strength heat-resistant aluminum alloy material for the engine piston comprises the following steps:
selecting Al99.7 percent of industrial pure aluminum, placing the industrial pure aluminum in a smelting furnace to be molten into aluminum liquid, and heating the aluminum liquid to 720-750 ℃;
respectively weighing intermediate alloys according to the formula of 0.4 percent of Zr, 0.78 percent of Y10 percent, 1 percent of Fe, 0.2 percent of Mg0.2 percent, 0.06 percent of Si1 percent, 0.06 percent of Ti0 and 0.012 percent of B, and putting the intermediate alloys into aluminum liquid; after standing for 30 minutes, fully stirring the aluminum liquid by using a graphite rod to ensure that the components are uniform;
controlling the temperature of the aluminum liquid to be about 730 ℃, deslagging, degassing and refining the melt by using high-purity argon to obtain aluminum alloy liquid, and pouring the aluminum alloy liquid into a Y-shaped graphite mold and a hot cracking test mold.
The defects of the castings are detected by industrial X-rays, and then the castings are subjected to heat treatment in a heat treatment furnace, wherein the solution heat treatment temperature is 500 ℃, the time is 4 hours, and the aging heat treatment temperature is 280 ℃, the time is 6 hours.
The X-ray result of the high-strength heat-resistant aluminum alloy material for the engine piston prepared by the embodiment shows that the casting has no obvious defects. The tensile strength is 280MPa through mechanical property detection, and the strength does not decrease and inversely increases after the heating is carried out for 1 hour at 280 ℃; after heating at 400 ℃ for 1 hour, the strength residual rate is higher than 97%.
Example 3
The high-strength heat-resistant aluminum alloy material for the engine piston in the embodiment comprises the following elements in percentage by weight: zr0.6%, Y13%, Fe 3%, Mg0.3%, Si 2%, Ti0.08%, B0.016% and the balance of Al.
The high-strength heat-resistant aluminum alloy material for the engine piston comprises the following steps:
selecting Al99.7% industrial pure aluminum, placing the industrial pure aluminum in a smelting furnace to be molten into aluminum liquid, and heating the aluminum liquid to 720-750 ℃;
weighing intermediate alloys according to the formula of Zr0.6%, Y13%, Fe 3%, Mg0.3%, Si 2%, Ti0.08% and B0.016%, and placing the intermediate alloys into aluminum liquid; after standing for 30 minutes, fully stirring the aluminum liquid by using a graphite rod to ensure that the components are uniform;
controlling the temperature of the aluminum liquid to be about 730 ℃, deslagging, degassing and refining the melt by using high-purity argon to obtain aluminum alloy liquid, and pouring the aluminum alloy liquid into a Y-shaped graphite mold and a hot cracking test mold.
The defects of the castings are detected by industrial X-rays, and then the castings are subjected to heat treatment in a heat treatment furnace, wherein the temperature of the solution heat treatment is 500 ℃, the time is 6 hours, and the temperature of the aging heat treatment is 280 ℃, the time is 6 hours.
The X-ray result of the high-strength heat-resistant aluminum alloy material for the engine piston prepared by the embodiment shows that the casting has no obvious defects. The tensile strength is 330MPa through mechanical property detection, and the strength does not decrease and inversely increases after the heating is carried out for 1 hour at 280 ℃; after heating at 400 ℃ for 1 hour, the strength residual rate reached 98%.
Example 4
The high-strength heat-resistant aluminum alloy material for the engine piston in the embodiment comprises the following elements in percentage by weight: 2% of Zr, 6% of Y, 2.5% of Fe, 0.3% of Mg0.3%, 2% of Si, 0.08% of Ti0.016% of B and the balance of Al. The material was prepared in the same manner as in example 1 above.
The heat resistance experiment of the material obtained in the embodiment shows that the strength does not decrease or increase reversely after the material is heated for 1 hour at 280 ℃; after heating at 410 ℃ for 1 hour, the strength remained unchanged.
Example 5
The high-strength heat-resistant aluminum alloy material for the engine piston in the embodiment comprises the following elements in percentage by weight: 1% of Zr, 11% of Y, 2% of Fe, 0.3% of Mg0.3%, 2% of Si, 0.08% of Ti0, 0.016% of B and the balance of Al. The material was prepared in the same manner as in example 1 above.
The heat resistance experiment of the material obtained in the embodiment shows that the strength does not decrease or increase reversely after the material is heated for 1 hour at 280 ℃; after heating at 400 ℃ for 1 hour, the strength remained unchanged.
In conclusion, the heat-resistant aluminum alloy has good casting performance and mechanical property, and the tensile strength reaches 330 MPa. The material also has good heat resistance, and a heat resistance experiment shows that after the material is heated for 1 hour at 280 ℃, the strength does not decrease and increase reversely; after heating at 400 ℃ for 1 hour, the strength remained unchanged.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and various examples can be obtained by changing the contents of the elements and the conditions of the preparation parameters in the present invention, and those skilled in the art can make various modifications or alterations within the scope of the claims without affecting the essence of the present invention.
Claims (10)
1. A high-strength heat-resistant aluminum alloy material for an engine piston is characterized by comprising the following elements in percentage by weight: 0.2 to 2 percent of zirconium Zr, 6 to 13 percent of yttrium Y, 0.5 to 3 percent of iron Fe, 0.8 to 2 percent of silicon Si, 0.1 to 0.3 percent of magnesium Mg0.05 to 0.08 percent of titanium Ti, 0.01 to 0.15 percent of boron B and the balance of Al;
the high-strength heat-resistant aluminum alloy material for the engine piston is prepared by the following method:
putting an industrial pure aluminum ingot into a smelting furnace for melting, and controlling the temperature of aluminum liquid to be between 720 and 750 ℃;
adding Al-Zr intermediate alloy, Al-Y intermediate alloy, Al-Fe intermediate alloy, Al-Si intermediate alloy, Al-Mg intermediate alloy and Al-Ti-B intermediate alloy refiner into the aluminum liquid, standing, and fully stirring the aluminum liquid to ensure that the components are uniform;
then controlling the temperature of the aluminum liquid at 720-750 ℃, deslagging, degassing and refining;
and after refining treatment, removing slag on the surface of the aluminum by using a slag removing rake, pouring the slag into a mold to obtain an alloy ingot, and performing heat treatment on the alloy ingot at the temperature of 280-550 ℃ to obtain the high-strength heat-resistant aluminum alloy material.
2. The high-strength heat-resistant aluminum alloy material for the engine piston as claimed in claim 1, which is composed of the following elements in percentage by weight: 1 to 2 percent of zirconium Zr, 10 to 13 percent of yttrium Y, 2 to 3 percent of iron Fe, 0.8 to 2 percent of silicon Si, 0.1 to 0.3 percent of magnesium Mg0.05 to 0.08 percent of titanium Ti, 0.01 to 0.15 percent of boron B and the balance of Al.
3. The high-strength heat-resistant aluminum alloy material for engine pistons as claimed in claim 1 or 2, wherein the material is formed into α -Al by eutectic reaction of rare earth Y and Al3Y binary eutectic structure.
4. A method for producing a high-strength heat-resistant aluminum alloy material for an engine piston as recited in any one of claims 1 to 3, characterized by comprising the steps of:
putting an industrial pure aluminum ingot into a smelting furnace for melting, and controlling the temperature of aluminum liquid to be between 720 and 750 ℃;
adding Al-Zr intermediate alloy, Al-Y intermediate alloy, Al-Fe intermediate alloy, Al-Si intermediate alloy, Al-Mg intermediate alloy and Al-Ti-B intermediate alloy refiner into the aluminum liquid, standing, and fully stirring the aluminum liquid to ensure that the components are uniform;
then controlling the temperature of the aluminum liquid at 720-750 ℃, deslagging, degassing and refining;
and after refining treatment, removing slag on the surface of the aluminum by using a slag removing rake, pouring the slag into a mold to obtain an alloy ingot, and performing heat treatment on the alloy ingot at the temperature of 280-550 ℃ to obtain the high-strength heat-resistant aluminum alloy material.
5. The method of claim 4, wherein each of the above-mentioned added master alloys has at least one of the following characteristics:
-said Al-Zr master alloy, wherein the content of Zr is 6.54 wt.%;
-said Al-Y master alloy, wherein the content of Y is 20 wt.%;
-said Al-Fe master alloy, wherein the content of Fe is 20 wt.%;
-said Al-Si master alloy, wherein the content of Si is 10 wt.%;
-said Al-Mg master alloy, wherein the content of Mg is 5 wt.%.
6. The preparation method of the high-strength heat-resistant aluminum alloy material for the engine piston as recited in claim 4, wherein the Al-Ti-B intermediate alloy refiner is Al-5Ti-1B intermediate alloy refiner in percentage by mass.
7. The method for producing a high-strength heat-resistant aluminum alloy material for an engine piston as recited in claim 4, wherein said standing is performed for 30 minutes or more.
8. The preparation method of the high-strength heat-resistant aluminum alloy material for the engine piston as claimed in claim 4, wherein the heat treatment is carried out for 6-15 hours.
9. The method for preparing the high-strength heat-resistant aluminum alloy material for the engine piston as recited in claim 4, wherein the heat treatment is: carrying out solution heat treatment and aging heat treatment in a heat treatment furnace, wherein: the temperature range of the solution heat treatment is 500-550 ℃, the time is 3-6 hours, the temperature range of the aging heat treatment is 280-330 ℃, and the time is 4-6 hours.
10. The method for producing a high-strength heat-resistant aluminum alloy material for an engine piston as recited in any one of claims 4 to 9, wherein the purity of the aluminum ingot is 99.7% or more.
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| CN113136505B (en) * | 2021-03-15 | 2022-04-26 | 上海交通大学 | High-strength and high-toughness heat-resistant aluminum alloy armature material and preparation method thereof |
| CN113802034B (en) * | 2021-08-23 | 2022-12-02 | 合肥工业大学 | Heat-resistant aluminum alloy for piston, preparation method and performance |
| CN114381635B (en) * | 2022-01-18 | 2022-11-11 | 广西大学 | Aluminum alloy containing rare earth grain refiner for battery tray and preparation method thereof |
| CN115821122B (en) * | 2022-11-21 | 2024-04-05 | 安徽中科春谷激光产业技术研究院有限公司 | Block nano-stacking fault aluminum alloy material and preparation and cold rolling methods thereof |
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