CN116377292A - High Si-Cu-based aluminum alloy suitable for multiple solid solution strengthening treatments and preparation method and application thereof - Google Patents
High Si-Cu-based aluminum alloy suitable for multiple solid solution strengthening treatments and preparation method and application thereof Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 54
- 238000011282 treatment Methods 0.000 title claims abstract description 48
- 229910018594 Si-Cu Inorganic materials 0.000 title claims abstract description 40
- 229910008465 Si—Cu Inorganic materials 0.000 title claims abstract description 40
- 238000005728 strengthening Methods 0.000 title claims abstract description 25
- 239000006104 solid solution Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 50
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 46
- 230000032683 aging Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052718 tin Inorganic materials 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 238000007670 refining Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 11
- 238000005303 weighing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000676 Si alloy Inorganic materials 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A high Si-Cu-based aluminum alloy suitable for multiple solid solution strengthening treatments, a preparation method and application thereof. The invention belongs to the field of aluminum alloy. The invention aims to solve the technical problems of long ageing strengthening period and limited heat treatment process for ageing strengthening of the existing aluminum alloy material. The alloy of the invention comprises the following components in percentage by mass: si:9.5 to 11.0 percent of Cu:1.5 to 2.0 percent of Mn:0.15 to 0.2 percent of Sn:0.05 to 0.15 percent, and the balance of Al and unavoidable impurities. The alloy provided by the invention can be suitable for various solid solution strengthening treatments, and can obtain higher mechanical properties after short-time aging strengthening.
Description
Technical Field
The invention belongs to the field of aluminum alloy, and particularly relates to a high Si-Cu-based aluminum alloy suitable for multiple solid solution strengthening treatments, and a preparation method and application thereof.
Background
As an important lightweight metal structural material, the aluminum-silicon alloy has higher specific strength, good formability and corrosion resistance and is widely applied to the fields of automobiles, aerospace, communication equipment and the like. However, the heat treatment period of the part of the heat-treatable reinforced aluminum-silicon alloy is long, so that the application of the heat-treatable reinforced aluminum-silicon alloy is limited. Among them, the problem of slow aging response rate of Al-Si-Cu alloy is particularly serious. Researchers In the related field find that the ageing response rate of Al-Si-Cu alloy can be remarkably accelerated by introducing elements such as Ge, in, sc and the like. However, these elements are quite expensive and cannot be widely used in actual production processes.
In addition, the effect of accelerating aging strengthening for these elements is limited to the traditional T6 heat treatment process (namely water quenching after solution treatment), and the use effect of the aluminum alloy material requiring air cooling after solution treatment is not clear. Therefore, there is a need to develop an Al-Si-Cu alloy material that can accommodate a variety of solution strengthening treatments while having the ability to rapidly age strengthen and control alloy costs.
Disclosure of Invention
The invention provides a high Si-Cu-based aluminum alloy suitable for multiple solid solution strengthening treatments and a preparation method and application thereof, aiming at solving the technical problems of long ageing strengthening period and relatively limited heat treatment process for ageing strengthening of the existing aluminum alloy material.
One of the purposes of the invention is to provide a high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments, wherein the high Si-Cu-based aluminum alloy comprises the following components in percentage by mass:
si:9.5 to 11.0 percent of Cu:1.5 to 2.0 percent of Mn:0.15 to 0.2 percent of Sn:0.05 to 0.15 percent, and the balance of Al and unavoidable impurities.
Further defined, the high Si-Cu-based aluminum alloy comprises the following components in percentage by mass:
si:9.5 to 10.5 percent of Cu:1.0 to 2.0 percent of Mn:0.1 to 0.2 percent of Sn:0.05 to 0.20 percent, and the balance of Al and unavoidable impurities.
Further defined, the impurity content is less than or equal to 0.2wt.%.
The second object of the invention is to provide a preparation method of high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments, which comprises the following steps:
step 1: melting an Al ingot and an Al-20Si alloy at 750-800 ℃, adding an Al-10Mn and Al-50Cu intermediate alloy after melting, standing for 20-30 min, cooling to 730-740 ℃, adding pure Sn, stirring uniformly, adding a refining agent, introducing high-purity argon, and preserving heat for 10-20 min to obtain an alloy melt;
step 2: and (3) injecting the alloy melt into an iron mold preheated to 250-300 ℃ at 700-720 ℃ for casting and forming to obtain the high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments.
Further defined, the refining agent in step 1 is C 2 Cl 6 And KF.
The third object of the present invention is to provide a solution treatment method of a high Si-Cu-based aluminum alloy obtained by the above method, which comprises the steps of:
the high Si-Cu-based aluminum alloy is subjected to solution treatment at 500-530 ℃ for 8-14 h, and then is subjected to water quenching or air cooling.
Further limiting, carrying out solution treatment at 510-525 ℃ for 8-10 h.
The invention also provides an aging treatment method of the high Si-Cu-based aluminum alloy after solution treatment according to the method, which comprises the following steps:
and immediately performing aging treatment at 160-200 ℃ for 10-90 h after the solution treatment to obtain the high-strength high-Si-Cu-based aluminum alloy.
Further, the aging treatment is carried out at 160 to 180 ℃ for 10 to 80 hours immediately after the solution treatment.
The fifth object of the invention is to provide a high-strength high-Si-Cu-based aluminum alloy after aging treatment according to the method, wherein the room-temperature yield strength of the high-strength high-Si-Cu-based aluminum alloy is up to 183MPa, and the tensile strength is up to 245MPa.
The invention aims at providing an application of a high-strength high-Si-Cu-based aluminum alloy in the fields of automobiles, aerospace and communication equipment.
Compared with the prior art, the invention has the advantages that:
(1) According to the invention, sn element is introduced through a microalloying thought, and because the combination energy of Sn and vacancies is large, sn and vacancies can be strongly combined in the cooling process after solution treatment, and vacancies are released in the aging process, so that the diffusion and migration of Cu element are accelerated, and finally, the effect of rapid aging strengthening is achieved.
(2) According to the invention, the contents of elements in the alloy are adjusted, so that the contents of Si and Cu are purposefully improved, and the ageing strengthening capability of the alloy after Sn is introduced under different application requirements is synergistically improved. The invention further enriches and improves the strengthening effect of introducing Sn element by regulating alloy composition under the air cooling condition, and improves the morphology of the eutectic silicon phase by effectively refining the morphology of the eutectic silicon phase and the morphology and distribution of the primary alpha-Al crystal grains, thereby effectively reducing and improving the morphology and distribution of harmful impurity phases, and further obviously improving the mechanical property of the alloy after short-time aging strengthening.
Drawings
FIG. 1 is an optical mirror diagram of an as-cast alloy in example 3 and comparative example 2, wherein (a) is comparative example 2 and (b) is example 3;
FIG. 2 is a graph showing the hardness characterization of the alloy of example 1 and comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, methods and apparatus used, without any particular description, are those conventional in the art and are commercially available to those skilled in the art.
The terms "comprising," "including," "having," "containing," or any other variation thereof, as used in the following embodiments, are intended to cover a non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.
When an equivalent, concentration, or other value or parameter is expressed as a range, preferred range, or a range bounded by a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when ranges of "1 to 5" are disclosed, the described ranges should be construed to include ranges of "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a numerical range is described herein, unless otherwise indicated, the range is intended to include its endpoints and all integers and fractions within the range. In the present specification and claims, the range limitations may be combined and/or interchanged, such ranges including all the sub-ranges contained therein if not expressly stated.
The indefinite articles "a" and "an" preceding an element or component of the invention are not limited to the requirement (i.e. the number of occurrences) of the element or component. Thus, the use of "a" or "an" should be interpreted as including one or at least one, and the singular reference of an element or component includes the plural reference unless the amount clearly dictates otherwise.
Reference to "one embodiment" or "an embodiment" of the present invention means that a particular feature, structure, or characteristic may be included in at least one implementation of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1: the preparation method of the high-strength high-Si-Cu-based aluminum alloy comprises the following steps:
step 1:
firstly, weighing the following elements: si:10.5wt.%, cu:1.5wt.% Mn:0.20wt.%, sn:0.05wt.%, the unavoidable impurity content is less than or equal to 0.2wt.%, and the balance is Al;
then, melting the Al ingot and the Al-20Si alloy at 800 ℃, adding the Al-10Mn intermediate alloy and the Al-50Cu intermediate alloy after melting, and standing for 25min;
then cooling to 730 ℃, then adding pure Sn, stirring uniformly, and then adding refining agent C 2 Cl 6 And KF, and introducing high-purity (purity is 99.999%) argon, and preserving heat for 10min to obtain alloy melt.
Step 2:
and (3) injecting the alloy melt into an iron mold preheated to 280 ℃ at 710 ℃ for casting and forming to obtain the high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments.
Step 3:
and (3) carrying out solution treatment on the high Si-Cu-based aluminum alloy obtained in the step (2) at the temperature of 515 ℃ for 8 hours, and then carrying out water quenching.
Step 4:
and (3) immediately carrying out aging treatment on the sample subjected to water quenching in the step (3) at 170 ℃ for 24 hours to obtain the high-strength high-Si-Cu-based aluminum alloy.
Example 2: the preparation method of the high-strength high-Si-Cu-based aluminum alloy comprises the following steps:
step 1:
firstly, weighing the following elements: si:10.5wt.%, cu:1.5wt.% Mn:0.20wt.%, sn:0.05wt.%, the unavoidable impurity content is less than or equal to 0.2wt.%, and the balance is Al;
then, melting the Al ingot and the Al-20Si alloy at 800 ℃, adding the Al-10Mn intermediate alloy and the Al-50Cu intermediate alloy after melting, and standing for 25min;
then cooling to 730 ℃, then adding pure Sn, stirring uniformly, and then adding refining agent C 2 Cl 6 And KF, and introducing high-purity (purity is 99.999%) argon, and preserving heat for 10min to obtain alloy melt。
Step 2:
and (3) injecting the alloy melt into an iron mold preheated to 280 ℃ at 710 ℃ for casting and forming to obtain the high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments.
Step 3:
and (3) carrying out solution treatment on the high Si-Cu-based aluminum alloy obtained in the step (2) at the temperature of 515 ℃ for 8 hours, and then carrying out water quenching.
Step 4:
and (3) immediately carrying out aging treatment on the sample subjected to water quenching in the step (3) at 170 ℃ for 10 hours to obtain the high-strength high-Si-Cu-based aluminum alloy.
Example 3: the preparation method of the high-strength high-Si-Cu-based aluminum alloy comprises the following steps:
step 1:
firstly, weighing the following elements: si:10.5wt.%, cu:1.5wt.% Mn:0.20wt.%, sn:0.05wt.%, the unavoidable impurity content is less than or equal to 0.2wt.%, and the balance is Al;
then, melting the Al ingot and the Al-20Si alloy at 800 ℃, adding the Al-10Mn intermediate alloy and the Al-50Cu intermediate alloy after melting, and standing for 25min;
then cooling to 730 ℃, then adding pure Sn, stirring uniformly, and then adding refining agent C 2 Cl 6 And KF, and introducing high-purity (purity is 99.999%) argon, and preserving heat for 10min to obtain alloy melt.
Step 2:
and (3) injecting the alloy melt into an iron mold preheated to 280 ℃ at 710 ℃ for casting and forming to obtain the high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments.
Step 3:
and (3) carrying out solution treatment on the high Si-Cu-based aluminum alloy obtained in the step (2) at the temperature of 515 ℃ for 8 hours, and then carrying out air cooling.
Step 4:
and (3) immediately carrying out aging treatment on the sample subjected to air cooling in the step (3) at the temperature of 170 ℃ for 30 hours to obtain the high-strength high-Si-Cu-based aluminum alloy.
Comparative example 1: the preparation method of the aluminum alloy of the comparative example comprises the following steps:
step 1:
firstly, weighing the following elements: si:10.5wt.%, cu:1.5wt.% Mn:0.20wt.%, the unavoidable impurity content is less than or equal to 0.2wt.%, and the balance is Al;
then, melting the Al ingot and the Al-20Si alloy at 800 ℃, adding the Al-10Mn intermediate alloy and the Al-50Cu intermediate alloy after melting, and standing for 25min;
then cooling to 730 ℃, then adding pure Sn, stirring uniformly, and then adding refining agent C 2 Cl 6 And KF, and introducing high-purity (purity is 99.999%) argon, and preserving heat for 10min to obtain alloy melt.
Step 2:
and (3) injecting the alloy melt into an iron mold preheated to 280 ℃ at 710 ℃ for casting and forming to obtain the aluminum alloy.
Step 3:
and (3) carrying out solution treatment on the aluminum alloy obtained in the step (2) at 515 ℃ for 8 hours, and then carrying out water quenching.
Step 4:
and (3) immediately carrying out aging treatment on the sample subjected to water quenching in the step (3) at 170 ℃ for 48 hours to obtain the aluminum alloy.
Comparative example 2: the preparation method of the aluminum alloy of the comparative example comprises the following steps:
step 1:
firstly, weighing the following elements: si:10.5wt.%, cu:1.5wt.% Mn:0.20wt.%, the unavoidable impurity content is less than or equal to 0.2wt.%, and the balance is Al;
then, melting the Al ingot and the Al-20Si alloy at 800 ℃, adding the Al-10Mn intermediate alloy and the Al-50Cu intermediate alloy after melting, and standing for 25min;
then cooling to 730 ℃, then adding pure Sn, stirring uniformly, and then adding refining agent C 2 Cl 6 And KF, and introducing high-purity (purity is 99.999%) argon, and preserving heat for 10min to obtain alloy melt.
Step 2:
and (3) injecting the alloy melt into an iron mold preheated to 280 ℃ at 710 ℃ for casting and forming to obtain the aluminum alloy.
Step 3:
and (3) carrying out solution treatment on the aluminum alloy obtained in the step (2) at 515 ℃ for 8 hours, and then carrying out air cooling.
Step 4:
and (3) immediately carrying out aging treatment on the sample subjected to air cooling in the step (3) at 170 ℃ for 70 hours to obtain the aluminum alloy.
Detection test
Mechanical properties of the aluminum alloys obtained in examples 1 to 3 and comparative examples 1 to 2 were examined according to the standard GB/T228-2010, and the test results are shown in Table 1.
TABLE 1 mechanical Properties of alloys after solid solution+aging
The aluminum alloys obtained in examples 1 to 3 and comparative examples 1 to 2 were subjected to hardness test in accordance with the standard GB/T228-2010, and the test results are shown in Table 2.
TABLE 2 hardness of alloys after solid solution+aging
| Example 1 | Example 2 | Comparative example 1 | Example 3 | Comparative example 2 | |
| Peak hardness at aging/Hv | 93.5 | 93 | 79 | 84 | 80 |
In the foregoing, the present invention is merely preferred embodiments, which are based on different implementations of the overall concept of the invention, and the protection scope of the invention is not limited thereto, and any changes or substitutions easily come within the technical scope of the present invention as those skilled in the art should not fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. A high Si-Cu-based aluminum alloy suitable for multiple solid solution strengthening treatments is characterized by comprising the following components in percentage by mass:
si:9.5 to 11.0 percent of Cu:1.5 to 2.0 percent of Mn:0.15 to 0.2 percent of Sn:0.05 to 0.15 percent, and the balance of Al and unavoidable impurities.
2. The high Si-Cu-based aluminum alloy of claim 1, wherein it is composed of, by mass fraction:
si:9.5 to 10.5 percent of Cu:1.0 to 2.0 percent of Mn:0.1 to 0.2 percent of Sn:0.05 to 0.20 percent, and the balance of Al and unavoidable impurities.
3. The method for producing a high si—cu-based aluminum alloy according to claim 1 or 2, characterized by comprising the steps of:
step 1: melting an Al ingot and an Al-20Si alloy at 750-800 ℃, adding an Al-10Mn and Al-50Cu intermediate alloy after melting, standing for 20-30 min, cooling to 730-740 ℃, adding pure Sn, stirring uniformly, adding a refining agent, introducing high-purity argon, and preserving heat for 10-20 min to obtain an alloy melt;
step 2: and (3) injecting the alloy melt into an iron mold preheated to 250-300 ℃ at 700-720 ℃ for casting and forming to obtain the high Si-Cu-based aluminum alloy suitable for various solid solution strengthening treatments.
4. A method according to claim 3, wherein the refining agent in step 1 is C 2 Cl 6 And KF.
5. A solution treatment method of a high Si-Cu-based aluminum alloy obtained by the method as claimed in claim 3 or 4, characterized by comprising the steps of:
the high Si-Cu-based aluminum alloy is subjected to solution treatment at 500-530 ℃ for 8-14 h, and then is subjected to water quenching or air cooling.
6. The method according to claim 5, wherein the solution treatment is performed by maintaining the temperature at 510 to 525 ℃ for 8 to 10 hours.
7. The aging treatment method of a high si—cu-based aluminum alloy after solution treatment by the method as claimed in claim 5 or 6, characterized by comprising the steps of:
and immediately performing aging treatment at 160-200 ℃ for 10-90 h after the solution treatment to obtain the high-strength high-Si-Cu-based aluminum alloy.
8. The method according to claim 7, wherein the aging treatment is performed at 160 to 180 ℃ for 10 to 80 hours immediately after the solution treatment.
9. The high-strength high-Si-Cu-based aluminum alloy after aging treatment by the method of claim 7 or 8, wherein the room temperature yield strength is up to 183MPa and the tensile strength is up to 245MPa.
10. Use of the high strength high Si-Cu based aluminum alloy of claim 9 in automotive, aerospace and communication equipment applications.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220032A (en) * | 2015-11-11 | 2016-01-06 | 太仓海嘉车辆配件有限公司 | A kind of aluminium alloy for high strength and endurance quality support and preparation method thereof |
| WO2016161908A1 (en) * | 2015-04-10 | 2016-10-13 | 上海交通大学 | Non-heat-treated self-strengthening aluminum-silicon alloy and preparation process thereof |
| CN107217182A (en) * | 2017-06-08 | 2017-09-29 | 江苏华晟电气科技有限公司 | The manufacture method of aluminium alloy oil pump case and its aluminium alloy oil pump case of manufacture |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161908A1 (en) * | 2015-04-10 | 2016-10-13 | 上海交通大学 | Non-heat-treated self-strengthening aluminum-silicon alloy and preparation process thereof |
| CN105220032A (en) * | 2015-11-11 | 2016-01-06 | 太仓海嘉车辆配件有限公司 | A kind of aluminium alloy for high strength and endurance quality support and preparation method thereof |
| CN107217182A (en) * | 2017-06-08 | 2017-09-29 | 江苏华晟电气科技有限公司 | The manufacture method of aluminium alloy oil pump case and its aluminium alloy oil pump case of manufacture |
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