CN113174516B - Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof - Google Patents

Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof Download PDF

Info

Publication number
CN113174516B
CN113174516B CN202110417014.3A CN202110417014A CN113174516B CN 113174516 B CN113174516 B CN 113174516B CN 202110417014 A CN202110417014 A CN 202110417014A CN 113174516 B CN113174516 B CN 113174516B
Authority
CN
China
Prior art keywords
aluminum
scandium
silicon alloy
strength
containing high
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.)
Active
Application number
CN202110417014.3A
Other languages
Chinese (zh)
Other versions
CN113174516A (en
Inventor
姜峰
叶凯
樊伊兵
王玺
叶鹏程
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jialuminium New Materials Co ltd
Original Assignee
Zhejiang Jialuminium New Materials Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Jialuminium New Materials Co ltd filed Critical Zhejiang Jialuminium New Materials Co ltd
Priority to CN202110417014.3A priority Critical patent/CN113174516B/en
Publication of CN113174516A publication Critical patent/CN113174516A/en
Application granted granted Critical
Publication of CN113174516B publication Critical patent/CN113174516B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • C22C1/03Making non-ferrous alloys by melting using master alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043Changing 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

Abstract

The invention relates to a scandium-containing high-strength and high-toughness aluminum-silicon alloy, which comprises the following components in percentage by weight: sc 0.15-0.2%, Si: 9.5-11.5%, Mg: 0.1-0.35%, Mn: 0.08-0.3%, Zn: 0.01-0.2 percent of scandium-containing high-strength aluminum-silicon alloy, 0.2-1.0 percent of Co, and the balance of Al and inevitable impurities, wherein the scandium-containing high-strength aluminum-silicon alloy has a composition proportion relation satisfying the following formulas (1) and (2): less than or equal to 0.8 ({ Mn } + { Zn })/{ Mg } < 1.0 … … (1); { Co }/{ Mg } > 1.5 … … (2); wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy. According to the scandium-containing high-strength and high-toughness aluminum-silicon alloy, scandium, manganese, zinc and cobalt elements are added into the aluminum-silicon alloy, and the percentage contents of { Mn }, { Zn }, { Mg } and { Co } are strictly controlled, so that the effect of refining aluminum dendrites and eutectic silicon can be achieved, the strength and toughness of the aluminum-silicon alloy are remarkably improved, and meanwhile, the precipitation of unbalanced items of alloy elements is overcome through an effective heat treatment process. Through the regulation and control of the components of the material, the alloy generates a natural aging effect within room temperature aging time.

Description

Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof
Technical Field
The invention relates to an aluminum-silicon alloy and a preparation process thereof, in particular to a scandium-containing high-strength high-toughness aluminum-silicon alloy and a preparation process thereof.
Background
The high-performance aluminum alloy is a necessary basis for realizing lightweight of modern transportation tools, and has great demand in national defense equipment. In the current global automobile manufacturing industry, the average dosage of aluminum alloy of each automobile exceeds 120kg, which accounts for about 10 percent of the total weight of the whole automobile, and the oil consumption can be reduced by 0.7L/100km when the weight of the automobile is reduced by 100kg, so that the lightweight design becomes the most key index for the design of the current fuel oil type and new energy vehicles, and the trend of replacing steel with aluminum is continuously increased. In recent years, die-cast aluminum alloys have been widely used in the automobile industry to replace heavier materials of the same type, however, commercial aluminum alloys cannot provide yield strength of 200MPa or more and ultimate tensile strength of 330MPa or more, and satisfactory ductility in an as-cast state, and most of aluminum alloys are produced by heat treatment, which results in large cost consumption, and thus, higher requirements are placed on the alloy material and the production process thereof.
The aluminum-silicon die casting alloy has wide application because of small crystallization temperature interval, large silicon phase solidification crystallization latent heat and specific heat capacity, small linear shrinkage, good flowing property and filling property, and small hot cracking and loosening tendency. Under actual casting conditions, namely unbalanced solidification, primary alpha-Al in a hypoeutectic aluminum-silicon alloy microstructure is in a coarse dendritic shape, and the alloy performance is seriously influenced by a lamellar eutectic Si phase and a needle-shaped Fe-rich phase (such as beta-Al 5 FeSi). Therefore, the aluminum-silicon alloy alpha-Al crystal grain can be refined in industrial production, and the eutectic Si and the Fe-rich phase are modified and modified to be more widely applied.
Scandium has a strong grain refining effect on aluminum and aluminum alloy, and the effect is more obvious than other transition group elements. The aluminum alloy is alloyed in a trace amount, so that the strength, toughness, corrosion resistance and welding performance of the alloy can be effectively improved. The scandium-containing aluminum alloy becomes a new-generation lightweight structural material for aviation, aerospace and ships after aluminum-lithium alloy. How to use scandium to improve the microstructure of hypoeutectic aluminum-silicon alloy, refine the crystalline grains and modify the eutectic silicon form in the aluminum-silicon alloy, improve the toughness of the hypoeutectic aluminum-silicon alloy and is of great importance for expanding the application range of the hypoeutectic aluminum-silicon alloy.
The invention aims to develop a high-strength scandium-containing die-casting aluminum-silicon alloy to solve the problems.
Disclosure of Invention
The invention aims to solve the problems of low strength, poor toughness and insufficient ductility of commercial aluminum alloy in an as-cast state in the prior art, and provides a scandium-containing high-toughness aluminum-silicon alloy.
The second purpose of the invention is to provide a preparation process of the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the scandium-containing high-strength and high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc 0.15-0.2%, Si: 9.5-11.5%, Mg: 0.1-0.35%, Mn: 0.08-0.3%, Zn: 0.01-0.2 percent of scandium-containing high-strength aluminum-silicon alloy, 0.2-1.0 percent of Co, and the balance of Al and inevitable impurities, wherein the scandium-containing high-strength aluminum-silicon alloy has a composition proportion relation satisfying the following formulas (1) and (2):
0.8≤({Mn}+{Zn})/{Mg}≤1.0……(1);
{Co}/{Mg}≧1.5……(2);
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
The alloying degree of the ultrahigh-strength aluminum alloy is relatively high, so that the alloy is extremely easy to generate element segregation in the solidification process, and the coarse eutectic structures are gathered at the crystal points due to the nonequilibrium crystallization effect generated when the alloy is rapidly cooled. Meanwhile, the rapid cooling of the alloy can generate strong internal stress in the matrix. Both the precipitation of non-equilibrium terms and the generation of internal stresses can cause a decrease in the workability of the material, affecting the properties of the final alloy article (strength, toughness and corrosion resistance)
According to the scandium-containing high-strength and high-toughness aluminum-silicon alloy, scandium, manganese, zinc and cobalt elements are added into the aluminum-silicon alloy, and the percentage contents of { Mn }, { Zn }, { Mg } and { Co } are strictly controlled, so that the effect of refining aluminum dendrites and eutectic silicon can be achieved, the strength and toughness of the aluminum-silicon alloy are remarkably improved, and meanwhile, the precipitation of unbalanced items of alloy elements is overcome through an effective heat treatment process. The alloy can generate natural aging effect within room temperature aging time through the component regulation and control of the material.
Wherein the content range epsilon (0.8-1.0) of ({ Mn } + { Zn })/{ Mg }, the inventor of the application finds that the total content of ({ Mn } + { Zn }) and the ratio corresponding to the { Mg } content have obvious influence on the comprehensive performance of the scandium-containing high-strength and high-toughness aluminum-silicon alloy. When the total content of { Mn } + { Zn }) is too low, the effect of solving the high strength and toughness cannot be achieved, but the { Mg } content is also correlated, and considering that the content of ({ Mn } + { Zn }) is influenced by the { Mg } content.
The addition of Co (cobalt) improves the strength better. Therefore, from the viewpoint of improving the alloy characteristics, the higher the amount of Co added, the better. However, since the solid solubility of Co in the aluminum matrix is relatively small, excessive addition is of no significance. If the content of Co is too small, it is difficult to effectively achieve the strength target of the present invention. Therefore, the content of Co must be controlled to 0.2 to 1.0%. And the dosage of the cobalt is also required to be related to the content of the { Mg }, and the content of the Co (cobalt) is influenced by the content of the { Mg }.
Preferably, the scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc 0.16-0.18%, Si: 10.5-11.0%, Mg: 0.15-0.30%, Mn: 0.1-0.20%, Zn: 0.05 to 0.10 percent of scandium-containing high-strength aluminum-silicon alloy, 0.4 to 0.6 percent of Co, and the balance of Al and inevitable impurities, wherein the scandium-containing high-strength aluminum-silicon alloy has a composition proportion relation satisfying the following formulas (1) and (2):
({Mn}+{Zn})/{Mg}=1……(1);
{Co}/{Mg}≧2.0……(2);
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
Preferably, the scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc is 0.18%, Si: 10.0%, Mg: 0.2%, Mn: 0.195%, Zn: 0.05%, Co 0.5%, and the balance Al and unavoidable impurities.
Preferably, any one or more elements of Fe, Cr, Zr and Ti are further included, and the total amount thereof is 1.0wt% or less.
Preferably, the total amount of any one or more of Fe, Cr, Zr and Ti is 0.4 to 0.6 wt%.
The other elements may contain Fe, Cr, Zr, and Ti, as the case may be. Fe, Cr, Zr and Ti have the functions of refining the cast crystal grains and slowing down element segregation; when one or more of Fe, Cr, Zr and Ti elements are contained, the total content is preferably 0.01 wt% or more in order to sufficiently exhibit the above-mentioned various effects. However, when the content of each element is too large, the hot workability or cold workability is likely to be lowered, and the raw material cost is likely to be increased. Therefore, the total content of these elements is preferably controlled to 1.0wt% or less.
Preferably, it has an average grain diameter of 8 to 12 μm. As a result of the detailed investigation by the present inventors, if the final average crystal grain size is 8 μm or more and 12 μm or less, the above-mentioned desired objects of the present invention for toughness and strength can be satisfied at the same time.
A preparation process of scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following steps:
step S1 smelting: putting a pure aluminum ingot into a melter, heating to 750 ℃ with the temperature increased to 730 plus materials, spreading a layer of covering agent after the aluminum block is half-melted, after the aluminum liquid is completely melted, heating to 820 ℃ with the temperature increased to 800 plus materials, sequentially putting aluminum silicon and aluminum manganese in proportion during the heating process, after the temperature is increased to 820 ℃ with the temperature increased to 800 plus materials, sequentially adding aluminum scandium and aluminum cobalt in proportion, uniformly stirring and preserving the temperature for 30-45min after melting, cooling to 720 ℃ with the temperature increased to 700 plus materials, adding pure magnesium ingot and zinc ingot, uniformly stirring and refining, degassing by using a rotary blowing high-purity argon method after refining for 15-30min, deslagging after degassing time is 15-30min, preserving the temperature and standing for 15-20min with the temperature increased to 680 plus materials, detecting chemical components, and finishing casting after the component contents reach standards to obtain mixed aluminum liquid;
step S2 die casting: carrying out standard extrusion casting on the smelted mixed aluminum liquid, controlling the temperature of the aluminum liquid at 660-690 ℃, and controlling the temperature of a mold at 200-220 ℃;
step S3 heat treatment: the casting is subjected to solution treatment at 440-450 ℃ for 4-6h, and then artificial aging at 150-160 ℃ for 4-12h or natural aging for 12-24h is selected.
Preferably, in step S1, the heating rate of the heating process is 1.5-2.0 deg.C/min.
Preferably, the heat treatment in the step S3 adopts artificial aging treatment, and the treatment time is 6-8 h.
Preferably, the heat treatment in the step S3 adopts natural aging treatment, and the treatment time is 16-20 h.
In the embodiment of the invention, the performances after different aging treatment modes are as follows: after the artificial aging treatment, the tensile strength is 340-360 Mpa, the yield strength is more than or equal to 220MP, and the elongation is 4-5%; after natural aging treatment, the tensile strength is 320-350 MPa, the yield strength is more than or equal to 180MPa, and the elongation is 6-8%. After artificial aging, the strength performance of the material is improved to some extent compared with natural aging, but the elongation is reduced to some extent.
The invention has the beneficial effects that: according to the scandium-containing high-strength and high-toughness aluminum-silicon alloy, scandium, manganese, zinc and cobalt elements are added into the aluminum-silicon alloy, and the percentage contents of { Mn }, { Zn }, { Mg } and { Co } are strictly controlled, so that the effect of refining aluminum dendrites and eutectic silicon can be achieved, the strength and toughness of the aluminum-silicon alloy are remarkably improved, and meanwhile, the precipitation of unbalanced items of alloy elements is overcome through an effective heat treatment process. The alloy can generate natural aging effect within room temperature aging time through the component regulation and control of the material.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
Example 1:
the scandium-containing high-strength and high-toughness aluminum-silicon alloy comprises the following components in percentage by weight: sc is 0.15%, Si: 9.5%, Mg: 0.1%, Mn: 0.08%, Zn: 0.01 percent of scandium, 0.2 percent of Co, and the balance of Al and inevitable impurities, and the scandium-containing high-strength and high-toughness aluminum-silicon alloy has the composition proportion relation satisfying the following formulas (1) and (2):
0.8 ≦ ({ Mn } + { Zn })/{ Mg } ≦ 1.0 … … (1), specifically ({ Mn } + { Zn })/{ Mg } ═ 0.9;
{ Co }/{ Mg } > 1.5 … … (2); specifically, { Co }/{ Mg } ═ 2;
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
The high-toughness scandium-containing aluminum-silicon alloy of example 1 had an average crystal grain diameter of 8 to 12 μm. The preparation process comprises the following steps:
step S1 smelting: putting a pure aluminum ingot into a melter, heating to 740-;
step S2 die casting: carrying out standard extrusion casting on the smelted mixed aluminum liquid, controlling the temperature of the aluminum liquid at 660-670 ℃, and controlling the temperature of a die at 200-210 ℃;
step S3 heat treatment: the casting is subjected to solution treatment for 6h at 440 ℃, and then artificial aging for 12h at 150 ℃ is selected. In step S1, the heating rates in the heating process are all 1.5 ℃/min.
The scandium-containing high-toughness Al-Si alloy in example 1 has a tensile strength of 342MPa, a yield strength of 232MP and an elongation of 4.2%
Example 2:
the scandium-containing high-strength and high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc is 0.2%, and Si: 11.5%, Mg: 0.35%, Mn: 0.3%, Zn: 0.05 percent, Co 1.0 percent and the balance of Al and inevitable impurities, and the scandium-containing high-strength high-toughness aluminum-silicon alloy has the composition proportion relation satisfying the following formulas (1) and (2):
less than or equal to 0.8 ({ Mn } + { Zn })/{ Mg } < 1.0 … … (1); specifically ({ Mn } + { Zn })/{ Mg } ═ 1.0;
{ Co }/{ Mg } > 1.5 … … (2); specifically, { Co }/{ Mg } -, 2.858;
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
The scandium-containing high-toughness aluminum-silicon alloy of example 2 had an average crystal grain diameter of 8 to 12 μm. The preparation process comprises the following steps:
step S1 smelting: putting a pure aluminum ingot into a melter, heating to 740-;
step S2 die casting: carrying out standard extrusion casting on the smelted mixed aluminum liquid, controlling the temperature of the aluminum liquid at 680-690 ℃ and controlling the temperature of a die at 210-220 ℃;
step S3 heat treatment: the casting is subjected to solution treatment for 4h at 450 ℃, and then artificial aging for 4h at 160 ℃ is selected.
The scandium-containing high-strength and high-toughness Al-Si alloy in example 2 has a tensile strength of 352MPa, a yield strength of 236MP and an elongation of 4.49%
Example 3:
the scandium-containing high-strength and high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
the scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc is 0.16%, Si: 10.5%, Mg: 0.15%, Mn: 0.1%, Zn: 0.05 percent of scandium, 0.4 percent of Co and the balance of Al and inevitable impurities, and the scandium-containing high-strength and high-toughness aluminum-silicon alloy has the composition proportion relation satisfying the following formulas (1) and (2):
({Mn}+{Zn})/{Mg}=1……(1);
{Co}/{Mg}=2.667……(2);
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
Example 3 had an average grain diameter of 8-12 μm. The preparation process comprises the following steps: step S1 smelting: putting a pure aluminum ingot into a melter, heating to 740-;
step S2 die casting: carrying out standard extrusion casting on the smelted mixed aluminum liquid, controlling the temperature of the aluminum liquid at 660 ℃ and controlling the temperature of a mould at 220 ℃;
step S3 heat treatment: the casting is subjected to solution treatment for 4h at 450 ℃, and natural aging is selected for 12 h.
The scandium-containing high-strength and high-toughness Al-Si alloy in example 3 has a tensile strength of 328MPa, a yield strength of 186MP and an elongation of 6.9%
Example 4:
the scandium-containing high-strength and high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc is 0.18%, Si: 11.0%, Mg: 0.20%, Mn: 0.1%, Zn: 0.10 percent of scandium, 0.6 percent of Co0.6 percent, and the balance of Al and inevitable impurities, wherein the scandium-containing high-strength and high-toughness aluminum-silicon alloy has a composition proportion relation satisfying the following formulas (1) and (2):
({Mn}+{Zn})/{Mg}=1……(1);
{Co}/{Mg}=3.0……(2);
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
The scandium-containing high-toughness aluminum-silicon alloy of example 4 had an average crystal grain diameter of 8 to 12 μm. The preparation process comprises the following steps:
step S1 smelting: putting a pure aluminum ingot into a melter, heating to 745 ℃ and 750 ℃, spraying a layer of covering agent after the aluminum block is semi-molten, after the aluminum liquid is completely molten, heating to 810 ℃ and 820 ℃, sequentially adding aluminum silicon and aluminum manganese according to the proportion in the heating process, when the temperature is increased to 810 ℃ and 820 ℃, sequentially adding aluminum scandium and aluminum cobalt according to the proportion, uniformly stirring and preserving heat for 40-45min after melting, cooling to 710 ℃ and 720 ℃, adding a pure magnesium ingot and a zinc ingot, uniformly stirring and refining, degassing by using a rotary blowing high-purity argon method after refining for 25-30min, deslagging after degassing for 25-30min, preserving heat at 680 ℃ and 690 ℃ for 15-20min, carrying out chemical component detection, and finishing casting after the component content reaches the standard to obtain mixed aluminum liquid;
step S2 die casting: carrying out standard extrusion casting on the smelted mixed aluminum liquid, controlling the temperature of the aluminum liquid at 680-690 ℃ and controlling the temperature of a die at 210-220 ℃;
step S3 heat treatment: the casting is subjected to solution treatment for 4 hours at 450 ℃, and then natural aging is selected for 24 hours.
The scandium-containing high-strength and high-toughness Al-Si alloy in example 4 has a tensile strength of 332MPa, a yield strength of 196MP and an elongation of 7.29%
Example 5:
the scandium-containing high-strength and high-toughness aluminum-silicon alloy comprises the following components in percentage by weight: sc is 0.18%, Si: 10.0%, Mg: 0.2%, Mn: 0.195%, Zn: 0.05%, Co 0.5%, and the balance Al and unavoidable impurities.
The preparation process is the same as in example 1.
The scandium-containing high-strength aluminum-silicon alloy of example 5 had a tensile strength of 352MPa, a yield strength of 232MP, and an elongation of 4.6%
Example 6:
basically, the method is the same as the method in example 1, except that the method further comprises the following steps: fe. The total amount of Cr was 0.4 wt%, 0.2% each.
The scandium-containing high-strength and high-toughness Al-Si alloy in example 6 has a tensile strength of 353MPa, a yield strength of 235MP and an elongation of 4.35%
Example 7
Basically, the method is the same as the method in example 1, except that the method further comprises the following steps: zr and Ti, the total amount being 0.6wt%, 0.3% each.
The scandium-containing high-strength and high-toughness Al-Si alloy in example 7 has a tensile strength of 355MPa, a yield strength of 234MP and an elongation of 4.3%
Example 8
Basically, the method is the same as the method in example 1, except that the method further comprises the following steps: fe. Cr, Zr and Ti, the total amount being 1.0wt%
The scandium-containing high-strength and high-toughness Al-Si alloy in example 8 has a tensile strength of 360MPa, a yield strength of 242MP and an elongation of 4.6%
The alloying degree of the ultrahigh-strength aluminum alloy is relatively high, so that the alloy is extremely easy to generate element segregation in the solidification process, and the coarse eutectic structures are gathered at the crystal points due to the nonequilibrium crystallization effect generated when the alloy is rapidly cooled. Meanwhile, the rapid cooling of the alloy can generate strong internal stress in the matrix. Both the precipitation of non-equilibrium terms and the generation of internal stresses can cause a decrease in the workability of the material, affecting the properties of the final alloy article (strength, toughness and corrosion resistance)
According to the scandium-containing high-strength and high-toughness aluminum-silicon alloy, scandium, manganese, zinc and cobalt elements are added into the aluminum-silicon alloy, and the percentage contents of { Mn }, { Zn }, { Mg } and { Co } are strictly controlled, so that the effect of refining aluminum dendrites and eutectic silicon can be achieved, the strength and toughness of the aluminum-silicon alloy are remarkably improved, and meanwhile, the precipitation of unbalanced items of alloy elements is overcome through an effective heat treatment process. The alloy can generate natural aging effect within room temperature aging time through the component regulation and control of the material.
Wherein the content range epsilon (0.8-1.0) of ({ Mn } + { Zn })/{ Mg }, the inventor of the application finds that the total content of ({ Mn } + { Zn }) and the ratio corresponding to the { Mg } content have obvious influence on the comprehensive performance of the scandium-containing high-strength and high-toughness aluminum-silicon alloy. When the total content of { Mn } + { Zn }) is too low, the effect of solving the high strength and toughness cannot be achieved, but the { Mg } content is also correlated, and considering that the content of ({ Mn } + { Zn }) is influenced by the { Mg } content.
The addition of Co (cobalt) improves the strength better. Therefore, from the viewpoint of improving the alloy characteristics, the higher the amount of Co added, the better. However, since the solid solubility of Co in the aluminum matrix is relatively small, excessive addition is of no significance. If the content of Co is too small, it is difficult to effectively achieve the strength target of the present invention. Therefore, the content of Co must be controlled to 0.2 to 1.0%. And the dosage of the cobalt is also required to be related to the content of the { Mg }, and the content of the Co (cobalt) is influenced by the content of the { Mg }.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims (10)

1. A scandium-containing high-strength high-toughness aluminum-silicon alloy is characterized in that: the scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc 0.15-0.2%, Si: 9.5-11.5%, Mg: 0.1-0.35%, Mn: 0.08-0.3%, Zn: 0.01-0.2 percent of scandium-containing high-strength aluminum-silicon alloy, 0.2-1.0 percent of Co, and the balance of Al and inevitable impurities, wherein the scandium-containing high-strength aluminum-silicon alloy has a composition proportion relation satisfying the following formulas (1) and (2):
0.8≤({Mn}+{Zn})/{Mg}≤1.0 ……(1);
{Co}/{Mg}≧1.5 ……(2);
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
2. The scandium-containing high-toughness aluminum-silicon alloy according to claim 1, wherein: the scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc 0.16-0.18%, Si: 10.5-11.0%, Mg: 0.15-0.30%, Mn: 0.1-0.20%, Zn: 0.05 to 0.10 percent of scandium-containing high-strength aluminum-silicon alloy, 0.4 to 0.6 percent of Co, and the balance of Al and inevitable impurities, wherein the scandium-containing high-strength aluminum-silicon alloy has a composition proportion relation satisfying the following formulas (1) and (2):
({Mn}+{Zn})/{Mg}=1 ……(1);
{Co}/{Mg}≧2.0 ……(2);
wherein { Mn }, { Zn }, { Mg } and { Co } respectively represent the weight percentages of Mn, Zn, Mg and Co in the scandium-containing high-strength and high-toughness aluminum-silicon alloy.
3. The scandium-containing high-toughness aluminum-silicon alloy according to claim 1, wherein: the scandium-containing high-strength high-toughness aluminum-silicon alloy comprises the following components in percentage by weight:
sc is 0.18%, Si: 10.0%, Mg: 0.2%, Mn: 0.195%, Zn: 0.05%, Co 0.5%, and the balance Al and unavoidable impurities.
4. The scandium-containing high-toughness aluminum-silicon alloy according to claim 1, wherein: further comprises one or more elements selected from Fe, Cr, Zr and Ti, and the total amount thereof is 1.0wt% or less.
5. The scandium-containing high-toughness aluminum-silicon alloy according to claim 3, wherein: fe. One or more elements selected from Cr, Zr and Ti in a total amount of 0.4 to 0.6 wt%.
6. The scandium-containing high-toughness aluminum-silicon alloy according to claim 1, wherein: has an average grain diameter of 8 to 12 μm.
7. A preparation process of the scandium-containing high-strength high-toughness aluminum-silicon alloy in any one of claims 1 to 6, which is characterized by comprising the following steps:
step S1 smelting: putting a pure aluminum ingot into a melter, heating to 750 ℃ with the temperature increased to 730 plus materials, spreading a layer of covering agent after the aluminum block is half-melted, after the aluminum liquid is completely melted, heating to 820 ℃ with the temperature increased to 800 plus materials, sequentially putting aluminum silicon and aluminum manganese in proportion during the heating process, after the temperature is increased to 820 ℃ with the temperature increased to 800 plus materials, sequentially adding aluminum scandium and aluminum cobalt in proportion, uniformly stirring and preserving the temperature for 30-45min after melting, cooling to 720 ℃ with the temperature increased to 700 plus materials, adding pure magnesium ingot and zinc ingot, uniformly stirring and refining, degassing by using a rotary blowing high-purity argon method after refining for 15-30min, deslagging after degassing time is 15-30min, preserving the temperature and standing for 15-20min with the temperature increased to 680 plus materials, detecting chemical components, and finishing casting after the component contents reach standards to obtain mixed aluminum liquid;
step S2 die casting: carrying out standard extrusion casting on the smelted mixed aluminum liquid, controlling the temperature of the aluminum liquid at 660-690 ℃, and controlling the temperature of a mold at 200-220 ℃;
step S3 heat treatment: the casting is subjected to solution treatment at 440-450 ℃ for 4-6h, and then artificial aging at 150-160 ℃ for 4-12h or natural aging for 12-24h is selected.
8. The preparation process of the scandium-containing high-strength high-toughness aluminum-silicon alloy according to claim 7, which is characterized in that: in step S1, the heating rates in the heating process are all 1.5-2.0 ℃/min.
9. The preparation process of the scandium-containing high-strength high-toughness aluminum-silicon alloy according to claim 7, which is characterized in that: and step S3, the heat treatment adopts artificial aging treatment, and the treatment time is 6-8 h.
10. The preparation process of the scandium-containing high-strength high-toughness aluminum-silicon alloy according to claim 7, which is characterized in that: and step S3, natural aging treatment is adopted for the heat treatment, and the treatment time is 16-20 h.
CN202110417014.3A 2021-04-19 2021-04-19 Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof Active CN113174516B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110417014.3A CN113174516B (en) 2021-04-19 2021-04-19 Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110417014.3A CN113174516B (en) 2021-04-19 2021-04-19 Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof

Publications (2)

Publication Number Publication Date
CN113174516A CN113174516A (en) 2021-07-27
CN113174516B true CN113174516B (en) 2021-11-26

Family

ID=76923668

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110417014.3A Active CN113174516B (en) 2021-04-19 2021-04-19 Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof

Country Status (1)

Country Link
CN (1) CN113174516B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113930646B (en) * 2021-12-13 2022-03-11 宁波合力科技股份有限公司 Treatment-free aluminum alloy and preparation method thereof
CN115418536A (en) * 2022-09-27 2022-12-02 杭州福贤新材料有限公司 Yttrium-zirconium modified high-strength corrosion-resistant aluminum-silicon alloy and preparation process thereof
CN115433857A (en) * 2022-09-27 2022-12-06 浙江极铝新材料有限公司 Lightweight aluminum-silicon alloy with good plasticity and preparation process thereof
CN115572865A (en) * 2022-09-27 2023-01-06 杭州福贤新材料有限公司 Yttrium-containing antioxidant high-strength aluminum-silicon alloy and preparation process thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112176231A (en) * 2020-10-20 2021-01-05 苏州有色金属研究院有限公司 High-strength and high-toughness die-casting aluminum alloy for automobile structural member and preparation method and application thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1586243A1 (en) * 1988-04-11 1995-04-10 М.Б. Альтман Alloy on the base of aluminium
US20070246132A1 (en) * 2006-03-27 2007-10-25 Dasgupta Rathindra Squeeze cast rear suspension components using ADC12-T4 aluminum alloy
US10370742B2 (en) * 2013-03-14 2019-08-06 Brunswick Corporation Hypereutectic aluminum-silicon cast alloys having unique microstructure
CN103421991B (en) * 2013-09-04 2016-06-08 安徽江淮汽车股份有限公司 A kind of Composite metamorphic cast aluminum alloy and its preparation method and application
RU2576707C2 (en) * 2014-06-05 2016-03-10 Общество с ограниченной ответственностью "КиК" Aluminium-based cast alloy
CN109097639B (en) * 2018-08-03 2020-10-30 江苏理工学院 High-strength high-toughness scandium-containing aluminum-silicon alloy and preparation method thereof
CN109136674B (en) * 2018-11-09 2021-07-06 广州埃烯金属科技有限公司 Graphene rare earth scandium synergistically enhanced Al-Si-Mg cast aluminum alloy and preparation method thereof
CN109972004A (en) * 2019-04-09 2019-07-05 广西大学 A kind of rare earth Sc Modification on Al-Si-Mg alloy and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112176231A (en) * 2020-10-20 2021-01-05 苏州有色金属研究院有限公司 High-strength and high-toughness die-casting aluminum alloy for automobile structural member and preparation method and application thereof

Also Published As

Publication number Publication date
CN113174516A (en) 2021-07-27

Similar Documents

Publication Publication Date Title
CN113174516B (en) Scandium-containing high-strength high-toughness aluminum-silicon alloy and preparation process thereof
CN108754256B (en) Non-heat treatment reinforced high-strength high-toughness die-casting aluminum-magnesium-silicon alloy and preparation method thereof
CN115287506B (en) Heat treatment-free high-strength and high-toughness cast aluminum alloy, and preparation method and application thereof
CN108300884B (en) A kind of hypoeutectic Al-Mg2The rotten and thinning method of Si alloy
KR20160011136A (en) Magnesium alloy having improved corrosion resistance and method for manufacturing magnesium alloy member using the same
CN115261683B (en) Water quenching-free high-strength and high-toughness cast Al-Si alloy and preparation method thereof
CN113564435A (en) High-strength cast aluminum alloy and preparation method thereof
CN115261684A (en) Cast Al-Si alloy and preparation method thereof
CN112048649A (en) Aluminum alloy, preparation method thereof and automobile casting
CN111074111A (en) High-strength cast aluminum-silicon alloy and manufacturing method thereof
CN101649405B (en) Al-Mg-Mn-Zr-Sr alloy and preparation method thereof
CN115433857A (en) Lightweight aluminum-silicon alloy with good plasticity and preparation process thereof
CN107937764B (en) Liquid die forging high-strength and high-toughness aluminum alloy and liquid die forging method thereof
CN109881061A (en) High-strength high corrosion-resistant magnesium alloy of one kind and preparation method thereof
CN115961186A (en) Die-casting aluminum alloy material and preparation method and application thereof
CN109943758B (en) High-strength high-toughness heat-resistant die-casting Mg-Er alloy and preparation method thereof
CN108396205B (en) Aluminum alloy material and preparation method thereof
CN113718144B (en) High-plasticity high-elastic-modulus aluminum-silicon casting alloy and preparation method and application thereof
CN113322402B (en) High-strength corrosion-resistant wrought magnesium alloy
CN103484742A (en) High-strength damping magnesium alloy
CN114525437A (en) Corrosion-resistant high-performance magnesium alloy with low alloy content and preparation method thereof
CN110195181B (en) Die-casting magnesium alloy with high-temperature heat resistance and manufacturing method thereof
CN112695234A (en) Corrosion-resistant aluminum alloy and preparation method thereof
CN110079714B (en) Non-heat-treatment-strengthened high-strength high-toughness die-casting aluminum-magnesium-copper alloy and preparation method thereof
CN117026036B (en) High-heat-conductivity high-strength wrought magnesium alloy and preparation method 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
GR01 Patent grant
GR01 Patent grant
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Jiang Feng

Inventor after: Ye Kai

Inventor after: Fan Yibing

Inventor after: Wang Xi

Inventor after: Ye Pengcheng

Inventor before: Jiang Feng

Inventor before: Ye Kai

Inventor before: Fan Yibing

Inventor before: Wang Xi

Inventor before: Ye Pengcheng

PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A high strength and toughness aluminum silicon alloy containing scandium and its preparation process

Effective date of registration: 20230311

Granted publication date: 20211126

Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd.

Pledgor: ZHEJIANG JIALUMINIUM NEW MATERIALS Co.,Ltd.

Registration number: Y2023330000498

PC01 Cancellation of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Granted publication date: 20211126

Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd.

Pledgor: ZHEJIANG JIALUMINIUM NEW MATERIALS Co.,Ltd.

Registration number: Y2023330000498