CN112281031A - Al-Mg-Si series multi-element aluminum alloy plate and preparation method thereof - Google Patents
Al-Mg-Si series multi-element aluminum alloy plate and preparation method thereof Download PDFInfo
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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Abstract
The invention belongs to the technical field of aluminum alloy manufacturing, and relates to an Al-Mg-Si series multi-element aluminum alloy plate and a preparation method thereof, wherein the Al-Mg-Si series multi-element aluminum alloy plate is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, La: 0.15-0.35%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al, and solves the problems that the yield strength loss of the existing 6-series aluminum alloy material is serious, and the safety of an automobile anti-collision system is affected.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy manufacturing, relates to an Al-Mg-Si series multi-element aluminum alloy plate and a preparation method thereof, and particularly relates to an Al-Mg-Si series multi-element aluminum alloy plate for an automobile anti-collision system and a preparation method thereof.
Background
With the development of lightweight automobiles, aluminum alloys are increasingly being used in the automotive industry. The aluminum alloy has the advantages of small density, good corrosion resistance, easy processing and the like, and also has certain energy absorption performance, wherein the 6-series aluminum alloy has better energy absorption effect, so that the 6-series aluminum alloy is mostly adopted in the automobile anti-collision system. Because the anti-collision system is in a heat exposure environment for a long time, the mechanical property of the anti-collision system is reduced, the service performance of the anti-collision system is reduced, and the safety coefficient of an automobile is reduced. The aluminum alloy extruded section of the anti-collision box is required to be placed for 1000 hours at the temperature of 150 ℃ in a whole factory, and the yield strength reduction amount of the aluminum alloy extruded section is not higher than 10 MPa. At present, the performance of the extruded section bar does not meet the requirements after the extruded section bar is processed at 150 ℃ for 1000 h.
Aiming at the problem that after the 6-series aluminum alloy material of the automobile anti-collision system is treated at 150 ℃ for 1000h, the yield strength loss is serious, and the safety of the automobile anti-collision system is influenced, a novel Al-Mg-Si-X alloy is designed, the structural form of the alloy is changed by adjusting the alloy components and the production process, the long-term thermal stability of the alloy is improved, the performances of an aluminum alloy extruded section, bending and the like are ensured, the application range of the aluminum alloy is expanded, and the aluminum alloy has strong scientific significance and practical significance for realizing the light weight goal.
Disclosure of Invention
In view of the above, the invention provides an Al-Mg-Si series multi-element aluminum alloy plate and a preparation method thereof, aiming at solving the problem that the yield strength loss of the existing 6 series aluminum alloy material is serious and the safety of an automobile anti-collision system is affected.
In order to achieve the aim, the invention provides an Al-Mg-Si series multi-element aluminum alloy plate which is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, X is less than or equal to 0.50%, single impurities are less than or equal to 0.05%, the total amount of the impurities is less than or equal to 0.15%, and the balance is Al, wherein X is one or more of Zr and La.
Further, the paint is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, Zr: 0.10-0.50%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al.
Further, the paint is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, La: 0.10-0.50%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al.
Further, the paint is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, La: 0.15-0.35%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al.
A preparation method of an Al-Mg-Si series multi-element aluminum alloy plate comprises the following steps:
A. proportioning aluminum alloy raw materials according to weight percentage, heating a smelting furnace to 600-700 ℃, adding aluminum ingots, adding Si ingots, Al-Mn intermediate alloys and Al-Zr intermediate alloys after the aluminum ingots collapse, heating the smelting furnace to 750-800 ℃, adding Mg ingots after the aluminum ingots are fully melted, uniformly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 40-60 mm/min, and the water flow is 3.3m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
A preparation method of an Al-Mg-Si series multi-element aluminum alloy plate comprises the following steps:
A. proportioning aluminum alloy raw materials according to weight percentage, heating a smelting furnace to 600-730 DEG CThen, adding an aluminum ingot, adding a Si ingot, an Al-Mn intermediate alloy and an Al-La intermediate alloy after the aluminum ingot is collapsed, raising the temperature of a smelting furnace to 750-800 ℃, fully melting, adding a Mg ingot, uniformly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 50-70 mm/min, and the water flow is 3.3-4.3 m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
The invention has the beneficial effects that:
1. the invention discloses a preparation method of an Al-Mg-Si series multi-element aluminum alloy plate, which comprises the following aging precipitation sequences of aluminum alloy: alpha supersaturated solid solution, GP zone, beta' phase, beta (Mg)2Si) phase. The beta' phase which is coherent with the matrix is precipitated initially, so that the strengthening effect is realized, and the alloy strength is improved. With the prolonging of the heat preservation time, the dispersed phase beta 'is diffused and grown to form a semi-coherent beta' phase, and a stable beta phase is formed in the later period, so that the strength of the alloy is reduced. Zr and Al form dispersed and fine ZrAl3The particles, in cooperation with the matrix, can effectively block the movement of grain boundaries and the growth of crystal grains, and the ZrAl3The particles have good thermal stability and are not easy to coarsen and grow in the heat treatment and heat preservation process. Rare earth La forms a second phase with Si to reduce the concentration of Si which can movably diffuse, and the interaction of La and Si reduces the migration rate of Si atoms to influence beta (Mg)2Si) phase is formed and grown, in addition, the rare earth La can improve the beta phase precipitation activation energy, postpone the inhibition of beta phase precipitation and improve the phenomenon of the strength reduction of the Al-Mg-Si alloy in the long-term heat treatment process.
2. According to the preparation method of the Al-Mg-Si series multi-element aluminum alloy plate, disclosed by the invention, the aluminum alloy material with excellent long-term thermal stability can be produced by adjusting the alloy components and comparing the mechanical properties and long-term thermal stability of different alloy components. On the basis of ensuring the bending and crushing performance of the existing alloy, the long-term thermal stability of the alloy is improved, and the application range of the 6-series aluminum alloy is expanded. By adjusting the alloy components, the microscopic grains of the alloy are refined, and the subsequent processing performance of the alloy is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a microscopic grain diagram of an aluminum alloy sheet prepared in example 1 of the present invention;
FIG. 2 is a microscopic grain diagram of an aluminum alloy sheet prepared in example 2 of the present invention;
FIG. 3 is a microscopic crystal grain diagram of an aluminum alloy sheet prepared by comparative example of the present invention;
FIG. 4 is a microscopic grain diagram of an aluminum alloy sheet prepared in example 3 of the present invention;
FIG. 5 is a microscopic grain diagram of the aluminum alloy sheet prepared in example 4 of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example 1
A preparation method of an Al-Mg-Si series multi-element aluminum alloy plate comprises the following steps:
A. the aluminum alloy raw material is prepared according to the weight percentage, and is prepared from the following element components in percentage by weight: si: 1.0%, Fe: 0.50%, Cu: 0.30%, Mn: 0.20%, Mg: 1.0%, Cr: 0.20%, Zn: 0.10%, Zr: 0.35 percent, less than or equal to 0.05 percent of single impurity, less than or equal to 0.15 percent of impurity in total, and the balance of Al; heating a smelting furnace to 600-700 ℃, adding an aluminum ingot, adding a Si ingot, an Al-Mn intermediate alloy and an Al-Zr intermediate alloy after the aluminum ingot collapses, heating the smelting furnace to 750-800 ℃, fully melting, adding an Mg ingot,then evenly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 40-60 mm/min, and the water flow is 3.3m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
Example 2
A preparation method of an Al-Mg-Si series multi-element aluminum alloy plate comprises the following steps:
A. the aluminum alloy raw material is prepared according to the weight percentage, and is prepared from the following element components in percentage by weight: si: 1.0%, Fe: 0.50%, Cu: 0.30%, Mn: 0.20%, Mg: 1.0%, Cr: 0.20%, Zn: 0.10%, La: 0.35 percent, less than or equal to 0.05 percent of single impurity, less than or equal to 0.15 percent of impurity in total, and the balance of Al; heating a smelting furnace to 600-730 ℃, adding an aluminum ingot, adding a Si ingot, an Al-Mn intermediate alloy and an Al-La intermediate alloy after the aluminum ingot is collapsed, heating the smelting furnace to 750-800 ℃, fully melting, adding an Mg ingot, uniformly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 50-70 mm/min, and the water flow is 3.3-4.3 m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
Comparative example
A preparation method of an Al-Mg-Si aluminum alloy plate comprises the following steps:
A. the aluminum alloy raw material is prepared according to the weight percentage, and is prepared from the following element components in percentage by weight: si: 1.0%, Fe: 0.50%, Cu: 0.30%, Mn: 0.20%, Mg: 1.0%, Cr: 0.20%, Zn: 0.10 percent, less than or equal to 0.05 percent of single impurity, less than or equal to 0.15 percent of impurity in total, and the balance of Al; heating a smelting furnace to 600-730 ℃, adding an aluminum ingot, adding a Si ingot and an Al-Mn intermediate alloy after the aluminum ingot collapses, heating the smelting furnace to 750-800 ℃, fully melting, adding a Mg ingot, uniformly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 50-70 mm/min, and the water flow is 3.3-4.3 m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
The mechanical properties of the aluminum alloy sheets T6 prepared in examples 1-2 and comparative example after aging are compared and shown in Table 1
TABLE 1
| Yield strength/MPa | Tensile strength/MPa | Elongation after break/% | |
| Comparative example | 203 | 220 | 12 |
| Example 1 | 205 | 223 | 13 |
| Example 2 | 208 | 230 | 12 |
The mechanical properties of the aluminum alloy sheets prepared in examples 1-2 and comparative examples after long-term thermal stabilization are compared and shown in Table 2
TABLE 2
| Yield strength/MPa | Tensile strength/MPa | Elongation after break/% | |
| Comparative example | 184.1 | 213.2 | 11.6 |
| Example 1 | 193.3 | 220.9 | 14.7 |
| Example 2 | 203.2 | 222 | 13.3 |
The strength decrease after long-term thermal stabilization of the aluminum alloy sheets prepared in examples 1-2 and comparative example is shown in Table 3
TABLE 3
| Yield strength reduction/MPa | |
| Comparative example | 18.9 |
| Example 1 | 11.7 |
| Example 2 | 4.8 |
Fig. 1 to 3 are the microscopic crystal grains of the alloy prepared in the embodiment compared with the existing alloy, the crystal grains of the alloy prepared in the embodiment are obviously smaller than those of the existing alloy, and the existing alloy crystal grains are refined by adding Zr and La elements into the existing alloy. The refinement of the crystal grains can improve the strength of the alloy and improve the processing performance of the alloy.
The grain size of the alloy prepared in the embodiment 2 is smaller than that of the alloy prepared in the embodiment 1, and the refining effect of adding La element in the existing alloy is better than that of adding Zr element.
The addition of La forms a second phase containing La with a certain strengthening effect, but La reacts with Si element to consume the strengthening phase Mg2Si atoms and strengthening phases in Si are reduced, the Al-Mg-Si alloy is weakened, the two phases are offset, and the artificial aging performance of the alloy prepared in the embodiment is similar to that of the existing alloy, as shown in Table 1.
As shown in Table 3, the alloy prepared in example 2 exhibited the lowest decrease in yield strength after 150 ℃ for 1000 hours.
Example 3
Example 3 differs from example 2 in that the La element content is: 0.15 percent.
Example 4
Example 4 differs from example 2 in that the La element content is: 0.50 percent.
A comparison of mechanical properties of T6 of the aluminum alloy sheets prepared in example 3, example 2 and example 4 after aging is shown in Table 4
TABLE 4
| Yield strength/MPa | Tensile strength/MPa | Elongation after break/% | |
| Example 3 | 206.7 | 225 | 11 |
| Example 2 | 208 | 230 | 12 |
| Example 4 | 216.9 | 235 | 14 |
A comparison of the mechanical properties of the aluminium alloy sheets prepared in example 3, example 2 and example 4 after long-term thermal stabilization is shown in Table 5
TABLE 5
| Yield strength/MPa | Tensile strength/MPa | Elongation after break/% | |
| Example 3 | 200 | 219 | 12.3 |
| Example 2 | 203.2 | 222 | 13.3 |
| Example 4 | 208 | 230 | 16 |
The strength decrease after long-term thermal stabilization of the aluminum alloy sheets prepared in examples 3, 2 and 4 is shown in Table 6
TABLE 6
| Yield strength reduction/MPa | |
| Example 3 | 6.7 |
| Example 2 | 4.8 |
| Example 4 | 8.9 |
Fig. 4, 2 and 5 are microscopic grain comparisons of different La contents with prior alloys. The microscopic grain size of the alloy prepared in the embodiment 3 is not much different from that of the existing alloy, and the grain refining effect of wt (La) less than 0.20 percent is not obvious enough; the grain size of the alloy prepared in the embodiment 2 is obviously reduced, and the grain refining effect is obvious; the content of La element is increased and the grain size of the alloy prepared in example 4 is increased, but the grain size is significantly reduced compared to the existing alloy.
Table 4 compares the T6 properties of alloys with different La content. The T6 strength properties gradually improved with increasing La content. Table 6 shows the yield strength reduction of alloys with different La contents after 150 ℃ 1000h treatment, wherein the yield strength reduction of the alloy prepared in example 2 is the least and the thermal stability effect is the best.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (6)
1. An Al-Mg-Si series multi-element aluminum alloy plate is characterized by being prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, X is less than or equal to 0.50%, single impurities are less than or equal to 0.05%, the total amount of the impurities is less than or equal to 0.15%, and the balance is Al, wherein X is one or more of Zr and La.
2. The Al-Mg-Si-based multi-element aluminum alloy sheet according to claim 1, which is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, Zr: 0.10-0.50%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al.
3. The Al-Mg-Si-based multi-element aluminum alloy sheet according to claim 1, which is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, La: 0.10-0.50%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al.
4. The Al-Mg-Si-based multi-element aluminum alloy sheet according to claim 1, which is prepared from the following element components in percentage by weight: si: 0.50-1.0%, Fe is less than or equal to 0.50%, Cu is less than or equal to 0.30%, Mn is less than or equal to 0.20%, Mg: 0.50-1.0%, Cr is less than or equal to 0.20%, Zn is less than or equal to 0.10%, La: 0.15-0.35%, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of impurity in total, and the balance of Al.
5. The method for producing an Al-Mg-Si-based multi-element aluminum alloy sheet according to claim 2, comprising the steps of:
A. proportioning aluminum alloy raw materials according to weight percentage, heating a smelting furnace to 600-700 ℃, adding aluminum ingots, adding Si ingots, Al-Mn intermediate alloys and Al-Zr intermediate alloys after the aluminum ingots collapse, heating the smelting furnace to 750-800 ℃, adding Mg ingots after the aluminum ingots are fully melted, uniformly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 40-60 mm/min, and the water flow is 3.3m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
6. The method for producing an Al-Mg-Si-based multi-element aluminum alloy sheet according to claim 3, comprising the steps of:
A. the method comprises the steps of proportioning aluminum alloy raw materials according to weight percentage, heating a smelting furnace to 600-730 ℃, adding an aluminum ingot, adding a Si ingot, an Al-Mn intermediate alloy and an Al-La intermediate alloy after the aluminum ingot collapses, heating the smelting furnace to 750-800 ℃, adding a Mg ingot after the aluminum ingot is fully melted, uniformly stirring, degassing, refining, standing, slagging off, carrying out semi-continuous casting, adding Al-Ti-B wires at an aluminum outlet, wherein the casting speed is 50-70 mm/min, and the water flow is 3.3-4.3 m3/h；
B. Cutting off the head and the tail of the cast aluminum alloy ingot and milling off a crust layer on the surface of the aluminum alloy ingot;
C. carrying out homogenization heat treatment on the aluminum alloy cast ingot in a push type heating furnace, wherein the homogenization heat treatment process comprises the following steps: heating the aluminum alloy ingot to 550 ℃, preserving heat for 8 hours and discharging;
D. extruding the homogenized cast ingot into a profile, and carrying out solution quenching by adopting an online water mist quenching mode;
E. and (3) carrying out T6 aging on the aluminum alloy plate after the solution quenching, wherein the aging system is 200 ℃ multiplied by 6h, and then carrying out long-term thermal stability test at 150 ℃ multiplied by 1000 h.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113293316A (en) * | 2021-04-16 | 2021-08-24 | 中国科学院金属研究所 | Method for efficiently improving refining capacity of Al-5Ti-1B intermediate alloy |
| CN113684401A (en) * | 2021-08-25 | 2021-11-23 | 航桥新材料科技（滨州）有限公司 | Aluminum alloy for high-service transmission shaft and preparation method thereof |
| CN115094278A (en) * | 2022-05-11 | 2022-09-23 | 宁波信泰机械有限公司 | 6-series aluminum alloy material with good thermal stability and preparation method thereof |
| CN115572870A (en) * | 2022-10-25 | 2023-01-06 | 祁阳宏泰铝业有限公司 | Enhanced 606X-series aluminum alloy, preparation method thereof and section processing method |
| CN117587301A (en) * | 2023-10-13 | 2024-02-23 | 广东豪美技术创新研究院有限公司 | High-strength high-conductivity Al-Si-Mg aluminum alloy and preparation method thereof |
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