A TiB with broadened peak duration region 2p Al-Mg-Si ceramic-aluminum alloy, its preparation method and applications

Abstract

The application provides a TiB 2p / Al-Mg-Si porcelain duralumin alloy, a preparation method and application thereof, the method comprises the following steps: component design; smelting: simultaneously heating and melting Al-5%TiB2 precursor and Al-3%B intermediate alloy, ultrasonic vibration treatment, heat preservation, alloying, refining, pouring; solid solution treatment; and the TiB 2p / Al-Mg-Si porcelain duralumin alloy is prepared after artificial aging treatment. Compared with the pure alloy, the TiB 2p / Al-Mg-Si porcelain duralumin alloy of the application has the peak aging region widening effect, the process window of artificial aging is widened, and the best mechanical property and electrical conductivity are obtained.

Description

Technical Field

[0001] This invention relates to new materials technology, and more particularly to a TiB material with a broadened peak aging region. 2p Al-Mg-Si ceramic-coated aluminum alloy, its preparation method and applications. Background Technology

[0002] Aluminum, as a good conductor, is widely used in applications such as power transmission lines. However, pure aluminum has low strength, resulting in a low safety factor in harsh service environments. Adding alloying elements to aluminum can typically improve strength, but it reduces electrical conductivity. Therefore, using low-alloyed 6xxx (Al-Mg-Si) aluminum alloys can serve as a compromise, ensuring sufficient strength without severely compromising conductivity. Al-Mg-Si alloys are heat-treatable aluminum alloys that significantly improve strength through a solution-aging process that precipitates fine, dispersed strengthening phases. During solution treatment, most alloying elements dissolve back into the aluminum matrix, followed by artificial aging, causing precipitation, growth, and coarsening. This precipitation strengthening process not only improves strength but also electrical conductivity. However, this process exhibits a peak aging state, meaning the strength peaks with aging time. This is because there is an optimal size during the growth and coarsening of the precipitated phases that maximizes strength. For Al-Mg-Si alloys, the diffusion rate of dissolved Mg and Si atoms is extremely fast, and the peak aging region in conventional aging methods is very narrow, resulting in a narrow process window and thus failing to obtain optimal performance.

[0003] Metallic materials contain numerous crystal defects, including vacancies, dislocations, and stacking faults, which can be controlled through processing techniques to alter the material's properties. Adding sparingly soluble TiB2 ceramic particles to Al-Mg-Si alloys forms TiB... 2p / Al-Mg-Si ceramic-aluminum alloys can not only form a large number of particle / matrix phase interface defects, but also generate a large number of thermal mismatch dislocations through solid solution-aging process. These defects will become rapid diffusion channels for solid solution atoms, thereby affecting their precipitation behavior. Summary of the Invention

[0004] The purpose of this invention is to address the problem in traditional Al-Mg-Si alloys where the diffusion rates of dissolved Mg and Si atoms are extremely fast, resulting in a very narrow peak aging region in conventional aging methods. This narrows the process window and prevents the achievement of optimal performance. The invention proposes a TiB alloy with a broadened peak aging region. 2p A method for preparing Al-Mg-Si ceramic-aluminum alloys is described. This method involves adding sparingly soluble TiB2 ceramic particles to an Al-Mg-Si alloy to regulate the precipitation behavior of the dispersed strengthening phase during artificial aging, thereby obtaining a TiB2 alloy with a broadened peak aging region. 2p / Al-Mg-Si ceramic-coated aluminum alloy has a simple process and low cost, and the prepared ceramic-coated aluminum alloy has excellent mechanical properties and electrical conductivity.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a TiB with a broadened peak aging region. 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy includes the following steps:

[0006] Step (1) Composition design: TiB2 ceramic particles are used to regulate the peak aging region broadening behavior of Al-Mg-Si alloy. The Mg content in the Al-Mg-Si alloy is 0.6%-0.8% and the Si content is 0.3%-0.9% (unless otherwise specified, % in this invention refers to mass fraction, the same below); two Al-Mg-Si alloys are preferred: a) high Si and low Mg, Al-0.6Mg-0.9Si; b) high Mg and low Si, Al-0.8Mg-0.3Si.

[0007] Step (2) Melting: a. Al-5%TiB2 precursor (the second phase is TiB2 ceramic phase particles, the B / Ti stoichiometric ratio is 1.6-1.7, and the excess Ti element exists in the form of Al3Ti intermetallic compound and solid-solution Ti atoms) and Al-3%B master alloy (the second phase is AlB2 ceramic phase particles) are mixed according to a B / Ti stoichiometric ratio of 2.0-2.1, and placed in a graphite clay crucible. The mixture is then heated to 750-780℃ in a pit-type crucible melting furnace and stirred to allow it to melt. a) Mix thoroughly; b) Apply ultrasonic vibration for 3-5 minutes to accelerate the reaction; c) Hold at the temperature for 20-30 minutes to ensure a complete reaction; d) Alloy the mixture using Al-10%Mg master alloy and Al-12%Si master alloy; e) Refine the melt by introducing high-purity argon gas for 3-10 minutes; f) Apply ultrasonic vibration for 3-5 minutes to disperse the distribution of ceramic particles; g) Pour the melt into a steel mold at a temperature of 720-750℃ to prepare a ceramic-aluminum alloy ingot.

[0008] Step (3) Solution treatment: Heat the ceramic-coated aluminum alloy ingot to 550-570℃ for solution treatment, hold for 720-1440 min, and then quench in water at room temperature.

[0009] Step (4) Artificial aging: After water quenching, the water is quickly sent to an aging furnace for artificial aging treatment. The temperature is 188-192℃ and the time is 0-210 min, with the preferred time being 60-210 min.

[0010] Furthermore, the Al-5%TiB2 precursor mentioned in step (2) is an Al-TiB2 base material produced in industrial ton-scale; the alkali metal content of the high metallurgical quality Al-3%B master alloy is less than 0.1%.

[0011] Furthermore, in step (2), the contents of Ti and B elements in the Al-5%TiB2 precursor are 3.5-3.6% and 1.4-1.5%, respectively.

[0012] Furthermore, the total TiB2 particle content in the ceramic-aluminum alloy ingot described in step (2) is 3.5% to 4.5%, preferably 4%.

[0013] Furthermore, in step (2), the mass fraction of Al-10%Mg master alloy added to the ceramic-aluminum alloy ingot is 6.2%-8.3%; and the mass fraction of Al-12%Si master alloy added is 2.5%-7.5%.

[0014] Furthermore, in step (2), when the Al-Mg-Si alloy is an Al-0.6Mg-0.9Si alloy, the mass fractions of Al-10%Mg master alloy and Al-12%Si master alloy added are 6.0-6.2% and 7.3-7.5%, respectively.

[0015] Furthermore, in step (2), when the Al-Mg-Si alloy is an Al-0.8Mg-0.3Si alloy, the mass fractions of Al-10%Mg master alloy and Al-12%Si master alloy added are 8.1-8.3% and 2.3-2.5%, respectively.

[0016] Furthermore, the Fe content of the ceramic-aluminum alloy ingot prepared in step (2) is less than 0.2%, and the content of each other impurity is less than 0.1%.

[0017] Furthermore, in step (2), all raw materials must be dried in a drying oven for 30 to 60 minutes before smelting.

[0018] Furthermore, the order of adding raw materials in step (2) is as follows: Al-3%B master alloy and Al-5%TiB2 precursor are heated simultaneously, and Al-10%Mg and Al-12%Si master alloy are added after the heat preservation reaction is completed, so as to eliminate the influence of alloying on the reaction.

[0019] Another object of the present invention discloses a TiB with a broadened peak aging region. 2p The Al-Mg-Si ceramic-coated aluminum alloy, prepared by the above method, compared with the pure alloy, whether it is a high-Si low-Mg system or a high-Mg low-Si system, the addition of TiB2 ceramic particles not only advances the peak aging, but also maintains the peak aging state for a longer time, that is, obtains the peak aging region broadening effect, widens the process window of artificial aging, and obtains the best mechanical properties and electrical conductivity.

[0020] Furthermore, the TiB with a widened peak duration region 2p The Al-Mg-Si ceramic-coated aluminum alloy comprises the following components by weight:

[0021] TiB2 3.5–4.5%;

[0022] Mg 0.6–0.8%;

[0023] Si 0.3-0.9%;

[0024] The Fe content of impurities is less than 0.2%;

[0025] The content of each other impurity is less than 0.1%;

[0026] The balance is Al.

[0027] Furthermore, the preferred TiB with a broadened peak aging region 2p The / Al-Mg-Si ceramic-aluminum alloy is TiB2 / Al-0.6Mg-0.9Si, and includes the following components by weight:

[0028] TiB2 / Al-0.6Mg-0.9Si:

[0029] TiB2 4%;

[0030] Mg 0.6%;

[0031] Si 0.9%;

[0032] The Fe content of impurities is less than 0.2%;

[0033] The content of each other impurity is less than 0.1%;

[0034] The balance is Al.

[0035] Furthermore, the preferred TiB with a broadened peak aging region 2p The / Al-Mg-Si ceramic-aluminum alloy is TiB2 / Al-0.8Mg-0.3Si, and includes the following components by weight:

[0036] TiB2 / Al-0.8Mg-0.3Si:

[0037] TiB2 4%;

[0038] Mg 0.8%;

[0039] Si 0.3%;

[0040] The Fe content of impurities is less than 0.2%;

[0041] The content of each other impurity is less than 0.1%;

[0042] The balance is Al.

[0043] Furthermore, the TiB2 content is preferably 4%.

[0044] Another object of the present invention discloses a TiB with a broadened peak aging region. 2p Applications of Al-Mg-Si ceramic-aluminum alloy in the field of power transmission conductors.

[0045] The present invention broadens the peak aging region of TiB 2p The Al-Mg-Si ceramic-coated aluminum alloy, its preparation method, and its applications have the following advantages compared with existing technologies:

[0046] 1) The TiB peak aging region broadened by this invention 2p Al-Mg-Si ceramic-coated aluminum alloys are closely integrated with traditional aluminum alloy manufacturing processes, making them easy to promote and cost-effective for large-scale mass production.

[0047] 2) The TiB peak aging region broadened by this invention 2p Compared to pure alloys, Al-Mg-Si ceramic-coated aluminum alloys exhibit earlier peak aging with the addition of TiB2 ceramic particles, and the peak aging state is maintained for a longer period, resulting in a broadened peak aging region. This expands the process window for artificial aging and yields optimal mechanical properties and electrical conductivity.

[0048] Among them, the high-Si, low-Mg system TiB2 / Al-0.6Mg-0.9Si has a peak hardness greater than 120HV0.2 and an electrical conductivity greater than 45% IACS; the high-Mg, low-Si system TiB2 / Al-0.8Mg-0.3Si has a peak hardness greater than 100HV0.2 and an electrical conductivity greater than 47% IACS.

[0049] 3) The TiB peak aging region broadened by this invention 2p / Al-Mg-Si ceramic-aluminum alloys can not only form a large number of particle / matrix phase interface defects, but also generate a large number of CTE dislocations through solid solution-aging process. These defects will become rapid diffusion channels for solid solution atoms, thereby affecting their precipitation behavior.

[0050] In this invention, P represents particle. Attached Figure Description

[0051] Figure 1 TiB prepared for control examples and examples 2p The results of differential scanning calorimetry (DSC) tests were performed on Al-Mg-Si ceramic-aluminum alloys. Figure (a) shows the Al-0.6Mg-0.9Si alloy and TiB alloy. 2pThe DSC curves of Al-0.6Mg-0.9Si ceramic-aluminum alloys are shown in Figure (b), and the curves of Al-0.8Mg-0.3Si alloys and TiB alloys are shown in Figure (b). 2p DSC curve of Al-0.8Mg-0.3Si ceramic-coated aluminum alloy.

[0052] Figure 2 TiB prepared for control examples and examples 2p The aging hardening curves of Al-Mg-Si ceramic-aluminum alloys are shown in Figure (a), where Al-0.6Mg-0.9Si alloy and TiB alloy are shown in Figure (a). 2p The age hardening curves of Al-0.6Mg-0.9Si ceramic-aluminum alloys are shown in Figure (b), and the curves of Al-0.8Mg-0.3Si alloys and TiB alloys are also shown in Figure (b). 2p Age hardening curve of Al-0.8Mg-0.3Si ceramic-aluminum alloy.

[0053] Figure 3 TiB prepared for control examples and examples 2p The conductivity-aging time curves of Al-Mg-Si ceramic-aluminum alloys are shown in Figure (a), where Figure (a) shows the conductivity-aging time curves of Al-0.6Mg-0.9Si alloy and TiB alloy. 2p The conductivity-aging time curves of Al-0.6Mg-0.9Si ceramic-aluminum alloys are shown in Figure (b), while those of Al-0.8Mg-0.3Si alloys and TiB alloys are shown in Figure (b). 2p Electrical conductivity-aging time curve of Al-0.8Mg-0.3Si ceramic-aluminum alloy.

[0054] Figure 4 TiB prepared in Example 1 2p Transmission electron microscopy (TEM) images of / Al-Mg-Si ceramic-aluminum alloys, showing TiB 2p CTE dislocation configuration near TiB2 ceramic particles in Al-0.6Mg-0.9Si ceramic-aluminum alloy.

[0055] Figure 5 for Figure 4 Distribution of precipitates near the middle dislocation.

[0056] Figure 6 The image shows a transmission electron microscope (TEM) image of Al-0.6Mg-0.9Si, revealing the dispersed distribution of precipitated phases in the alloy. Detailed Implementation

[0057] The present invention will be further described below with reference to the embodiments:

[0058] Compare with Example 1

[0059] This comparative example discloses a method for preparing an Al-0.6Mg-0.9Si alloy, comprising the following steps:

[0060] Step (1) Raw material preparation: 1) Industrial pure aluminum (purity > 99.7%), mass fraction of 86.3%; 2) Al-10%Mg master alloy, mass fraction of 6.2%; 3) Al-12%Si master alloy, mass fraction of 7.5%; 4) The raw materials are dried in a drying oven for 30 minutes at 200℃ before smelting.

[0061] Step (2) Melting: 1) Place industrial pure aluminum into a graphite clay crucible and heat it to 750°C in a pit-type crucible melting furnace; 2) Alloy it with Al-10%Mg master alloy and Al-12%Si master alloy; 3) Refine it by introducing high-purity argon gas into the melt for 5 minutes; 4) Refine the melt by applying ultrasonic vibration treatment for 3 minutes; 5) Pour the melt into a steel mold when the temperature is 720°C.

[0062] Step (3) Solution treatment: Cut the ingot into small samples, put them in a muffle furnace and heat to 560°C for solution treatment, hold for 720 minutes, and then quench in water at room temperature.

[0063] Step (4) Artificial aging: After water quenching, the water is quickly sent to an aging furnace for artificial aging treatment at a temperature of 190℃ for 0, 30, 60, 90, 120, 150, 180, and 210 min.

[0064] Compare with Example 2

[0065] This comparative example discloses a method for preparing an Al-0.8Mg-0.3Si alloy, comprising the following steps:

[0066] Step (1) Raw material preparation: 1) Industrial pure aluminum (purity > 99.7%), mass fraction of 89.2%; 2) Al-10%Mg master alloy, mass fraction of 8.3%; 3) Al-12%Si master alloy, mass fraction of 2.5%; 4) The raw materials are dried in a drying oven for 30 minutes at 200℃ before smelting.

[0067] Step (2) Melting: 1) Place industrial pure aluminum into a graphite clay crucible and heat it to 750°C in a pit-type crucible melting furnace; 2) Alloy it with Al-10%Mg master alloy and Al-12%Si master alloy; 3) Refine it by introducing high-purity argon gas into the melt for 5 minutes; 4) Refine the melt by applying ultrasonic vibration treatment for 3 minutes; 5) Pour the melt into a steel mold when the temperature is 720°C.

[0068] Step (3) Solution treatment: Cut the ingot into small samples, put them in a muffle furnace and heat to 560°C for solution treatment, hold for 720 minutes, and then quench in water at room temperature.

[0069] Step (4) Artificial aging: After water quenching, the water is quickly sent to an aging furnace for artificial aging treatment at a temperature of 190℃ for 0, 30, 60, 90, 120, 150, 180, and 210 min.

[0070] Example 1

[0071] This embodiment discloses a TiB with broadened peak aging region. 2p The preparation method of Al-0.6Mg-0.9Si ceramic-aluminum alloy includes the following steps:

[0072] Step (1) Raw material preparation: 1) Al-5%TiB2 precursor, mass fraction of 77.3%; 2) Al-3%B master alloy, mass fraction of 7.7%; 3) Al-10%Mg master alloy, mass fraction of 6.2%; 4) Al-12%Si master alloy, mass fraction of 7.5%; 5) Industrial pure aluminum (purity >99.7%), mass fraction of 1.3%; 6) The raw materials are dried in a drying oven for 30 minutes at 200℃ before smelting.

[0073] Step (2) Melting: 1) Place the Al-5%TiB2 precursor and Al-3%B master alloy into a graphite clay crucible and heat to 750℃ in a pit-type crucible melting furnace to melt them, stirring to ensure thorough mixing; 2) Apply ultrasonic vibration treatment for 3 minutes to accelerate the reaction; 3) Hold at the temperature for 30 minutes to ensure sufficient reaction; 4) Add Al-10%Mg master alloy and Al-12%Si master alloy to alloy them; 5) Pass high-purity argon gas into the melt for refining for 5 minutes; 6) Apply ultrasonic vibration treatment for 3 minutes to disperse the distribution of ceramic particles; 7) Pour the melt into a steel mold when the melt temperature is 720-750℃.

[0074] Step (3) Solution treatment: Cut the ingot into small samples, put them in a muffle furnace and heat to 560°C for solution treatment, hold for 720 minutes, and then quench in water at room temperature.

[0075] Step (4) Artificial aging: After water quenching, the water is quickly sent to an aging furnace for artificial aging treatment at a temperature of 190℃ for 0, 30, 60, 90, 120, 150, 180, and 210 min.

[0076] Example 2

[0077] This embodiment discloses a TiB with broadened peak aging region. 2p The preparation method of Al-0.8Mg-0.3Si ceramic-aluminum alloy includes the following steps:

[0078] Step (1) Raw material preparation: 1) Al-5%TiB2 precursor, mass fraction of 77.3%; 2) Al-3%B master alloy, mass fraction of 7.7%; 3) Al-10%Mg master alloy, mass fraction of 8.3%; 4) Al-12%Si master alloy, mass fraction of 2.5%; 5) Industrial pure aluminum (purity >99.7%), mass fraction of 4.2%; 6) The raw materials are dried in a drying oven for 30 minutes at 200℃ before smelting.

[0079] Step (2) Melting: 1) Place the Al-5%TiB2 precursor and Al-3%B master alloy into a graphite clay crucible and heat to 750℃ in a pit-type crucible melting furnace to melt them, stirring to ensure thorough mixing; 2) Apply ultrasonic vibration treatment for 3 minutes to accelerate the reaction; 3) Hold at the temperature for 30 minutes to ensure sufficient reaction; 4) Add Al-10%Mg master alloy and Al-12%Si master alloy to alloy them; 5) Pass high-purity argon gas into the melt for refining for 5 minutes; 6) Apply ultrasonic vibration treatment for 3 minutes to disperse the distribution of ceramic particles; 7) Pour the melt into a steel mold when the melt temperature is 720-750℃.

[0080] Step (3) Solution treatment: Cut the ingot into small samples, put them in a muffle furnace and heat to 560°C for solution treatment, hold for 720 minutes, and then quench in water at room temperature.

[0081] Step (4) Artificial aging: After water quenching, the water is quickly sent to an aging furnace for artificial aging treatment at a temperature of 190℃ for 0, 30, 60, 90, 120, 150, 180, and 210 min.

[0082] Combining Comparative Example 1, Comparative Example 2, Example 1, and Example 2, their DSC curves, age-hardening curves, conductivity-aging time curves, and precipitate distributions are as follows: Figures 1-6 As shown:

[0083] Figure 1 It is the prepared TiB 2p The results of differential scanning calorimetry (DSC) tests were performed on Al-Mg-Si ceramic-aluminum alloys. Figure (a) shows the Al-0.6Mg-0.9Si alloy and TiB alloy. 2p The DSC curves of Al-0.6Mg-0.9Si ceramic-aluminum alloys are shown in Figure (b), and the curves of Al-0.8Mg-0.3Si alloys and TiB alloys are shown in Figure (b). 2pThe DSC curves of the Al-0.8Mg-0.3Si ceramic-coated aluminum alloy are shown in the figure. It can be seen from the figure that the introduction of TiB2 ceramic particles does not affect the forward shift of the exothermic peak in the Al-0.6Mg-0.9Si alloy, but it leads to a significant forward shift of the exothermic peak in the Al-0.8Mg-0.3Si alloy, indicating that the addition of TiB2 ceramic particles has a significant impact on the diffusion of Mg.

[0084] Figure 2 It is the prepared TiB 2p The aging hardening curves of Al-Mg-Si ceramic-aluminum alloys are shown in Figure (a), where Al-0.6Mg-0.9Si alloy and TiB alloy are shown in Figure (a). 2p The age hardening curves of Al-0.6Mg-0.9Si ceramic-aluminum alloys are shown in Figure (b), and the curves of Al-0.8Mg-0.3Si alloys and TiB alloys are also shown in Figure (b). 2p The aging hardening curves of the Al-0.8Mg-0.3Si ceramic-coated aluminum alloy are shown in the figure. As can be seen from the figure, compared with the alloy, whether it is a high-Si low-Mg system or a high-Mg low-Si system, the addition of TiB2 ceramic particles not only advances the peak aging, but also maintains the peak aging state for a longer time, that is, it achieves the peak aging region broadening effect and expands the process window for artificial aging.

[0085] Figure 3 It is the prepared TiB 2p The conductivity-aging time curves of Al-Mg-Si ceramic-aluminum alloys are shown in Figure (a), where Figure (a) shows the conductivity-aging time curves of Al-0.6Mg-0.9Si alloy and TiB alloy. 2p The conductivity-aging time curves of Al-0.6Mg-0.9Si ceramic-aluminum alloys are shown in Figure (b), while those of Al-0.8Mg-0.3Si alloys and TiB alloys are shown in Figure (b). 2p The electrical conductivity-aging time curves of the Al-0.8Mg-0.3Si ceramic-aluminum alloy are shown in the figure. It can be seen from the figure that the electrical conductivity of both the alloy and the ceramic-aluminum alloy gradually increases and then tends to stabilize with increasing aging time.

[0086] Figure 4 It is the prepared TiB 2p Transmission electron microscopy (TEM) images of / Al-Mg-Si ceramic-aluminum alloys, showing TiB 2p CTE dislocation configuration near TiB2 ceramic particles in Al-0.6Mg-0.9Si ceramic-aluminum alloy. Figure 5 Showing Figure 4 Precipitate distribution near intermediate dislocations Figure 6 The dispersed distribution of precipitated phases in the Al-0.6Mg-0.9Si alloy is shown.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A TiB with broadened peak duration region 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, Includes the following steps: Step (1) Composition design: TiB2 ceramic particles were used to regulate the peak aging region broadening behavior of Al-Mg-Si alloys. The content of Mg in Al-Mg-Si alloys was 0.6%-0.8% and that of Si was 0.3%-0.9%. Step (2) Melting: a. Al-5%TiB2 precursor and Al-3%B master alloy are mixed in a B / Ti stoichiometric ratio of 2.0~2.1 and placed in a graphite clay crucible. The mixture is then heated to 750~780℃ in a pit-type crucible melting furnace and stirred to ensure thorough mixing; b. Ultrasonic vibration is applied for 3~5 min to accelerate the reaction; c. The mixture is held at this temperature for 20~30 min to ensure a complete reaction; d. Al-10%Mg master alloy and Al-12%Si master alloy are used to alloy the mixture; e. High-purity argon gas is introduced into the melt for refining for 3~10 min; f. Ultrasonic vibration is applied for 3~5 min to disperse the distribution of ceramic particles; g. The melt is poured into a steel mold at a temperature of 720~750℃ to obtain a ceramic-coated aluminum alloy ingot. Step (3) Solution treatment: Heat the ceramic-coated aluminum alloy ingot to 550~570℃ for solution treatment, hold for 720~1440 min, and then quench in water at room temperature. Step (4) Artificial aging: After water quenching, the water is quickly sent to an aging furnace for artificial aging treatment at a temperature of 188~192℃ for 60~210min.

2. The TiB with broadened peak aging region according to claim 1 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, In step (2), the contents of Ti and B elements in the Al-5%TiB2 precursor are 3.5~3.6% and 1.4~1.5%, respectively.

3. The TiB with broadened peak aging region according to claim 1 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, The total TiB2 particle content in the ceramic-aluminum alloy ingot in step (2) is 3.5-4.5%.

4. The TiB with broadened peak aging region according to claim 1 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, In step (2), the mass fraction of Al-10%Mg master alloy added to the ceramic-aluminum alloy ingot is 6.2%-8.3%; the mass fraction of Al-12%Si master alloy added is 2.5%-7.5%.

5. The TiB with broadened peak aging region according to claim 1 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, In step (2), when the Al-Mg-Si alloy is an Al-0.6Mg-0.9Si alloy, the mass fractions of Al-10%Mg master alloy and Al-12%Si master alloy added are 6.0~6.2% and 7.3~7.5%, respectively.

6. The TiB with broadened peak aging region according to claim 1 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, In step (2), when the Al-Mg-Si alloy is an Al-0.8Mg-0.3Si alloy, the mass fractions of Al-10%Mg master alloy and Al-12%Si master alloy added are 8.1~8.3% and 2.3~2.5%, respectively.

7. The TiB with broadened peak aging region according to claim 1 2p The preparation method of Al-Mg-Si ceramic-aluminum alloy is characterized by, In step (2), all raw materials must be dried in a drying oven for 30-60 minutes before smelting.

8. A TiB with broadened peak aging region 2p The Al-Mg-Si ceramic-aluminum alloy is prepared by the preparation method described in any one of claims 1-7.

9. A TiB with a broadened peak aging region as described in claim 8 2p Applications of Al-Mg-Si ceramic-aluminum alloy in the field of power transmission conductors.

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