CN114622150A - Cast aluminum alloy heat treatment method - Google Patents
Cast aluminum alloy heat treatment method Download PDFInfo
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- CN114622150A CN114622150A CN202011463803.2A CN202011463803A CN114622150A CN 114622150 A CN114622150 A CN 114622150A CN 202011463803 A CN202011463803 A CN 202011463803A CN 114622150 A CN114622150 A CN 114622150A
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- aluminum alloy
- cast aluminum
- heating
- heating furnace
- cooling
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 84
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 239000000243 solution Substances 0.000 claims abstract description 15
- 238000010791 quenching Methods 0.000 claims abstract description 14
- 230000000171 quenching effect Effects 0.000 claims abstract description 14
- 230000032683 aging Effects 0.000 claims abstract description 11
- 239000006104 solid solution Substances 0.000 claims abstract description 8
- 238000007664 blowing Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002035 prolonged 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
- 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
- C22F1/053—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 zinc as the next major constituent
-
- 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
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
A heat treatment method for cast aluminum alloy comprises the following steps: s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours; s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, blowing air by using a fan, and cooling to room temperature at a cooling rate of 20 ℃/min; s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 150-160 ℃ at the heating rate of 5 ℃/min, preserving heat for 5h, putting the heated part into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace. According to the invention, the cooling mode after the solution treatment is changed from water cooling to air cooling, so that the elongation is improved and the deformation is greatly reduced on the premise of ensuring that the hardness and the strength of the cast aluminum alloy after the heat treatment are similar to those of the cast aluminum alloy treated by the water cooling.
Description
Technical Field
The invention relates to the field of aluminum alloy heat treatment, in particular to a cast aluminum alloy heat treatment method.
Background
The aluminum has small density, good plasticity, excellent electrical conductivity and thermal conductivity, and good corrosion resistance, and is protected by a naturally formed compact oxide film on the surface. The cast aluminum alloy is an alloy formed by adding other metal elements or nonmetal elements on the basis of pure aluminum through casting. By carrying out heat treatment such as solid solution, aging and the like on the cast aluminum alloy, not only can the basic performance of pure aluminum be maintained, but also the cast aluminum alloy has good comprehensive performance due to the effect of alloying heat treatment. At present, cast aluminum alloy is widely applied to the fields of military affairs, industry, agriculture, transportation and the like.
In the prior art, cast aluminum alloy is heated to a certain fixed temperature for solution treatment, after the temperature is kept for a period of time, the cast aluminum alloy is rapidly cooled to room temperature through a water cooling mode, and then the cast aluminum alloy is heated to a certain temperature for artificial aging to improve the comprehensive properties of the cast aluminum alloy, such as strength, hardness, elongation and the like.
After the cast aluminum alloy workpiece is subjected to solution treatment and is rapidly cooled by water cooling, a large deformation amount is generated, so that a large margin is reserved before the cast aluminum alloy workpiece is subjected to heat treatment such as solution treatment and aging, a large amount of margin is removed by machining after the heat treatment such as solution treatment and aging, the machining time is prolonged, and the cost is increased.
Disclosure of Invention
The invention provides a heat treatment method for cast aluminum alloy with small deformation, which aims to solve the problem of large deformation caused by water cooling after the solution treatment of the cast aluminum alloy.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a heat treatment method for cast aluminum alloy comprises the following steps:
s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours;
s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, blowing air by using a fan, and cooling to room temperature at a cooling rate of 20 ℃/min;
s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 150-160 ℃ at the heating rate of 5 ℃/min, preserving heat for 5h, putting the heated part into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace.
Preferably, the content ratio of each component of the cast aluminum alloy is as follows: zn: 3.5% -4.5%, Mg: 1.5% -2.2%, Mn: 0.2% -0.6%, Ti: 0.2 to 0.4 percent of Fe, less than or equal to 0.5 percent of Fe and the balance of Al.
The invention can obtain the following technical effects:
by changing the cooling mode after the solution treatment from water cooling to air cooling, the elongation is improved and the deformation is greatly reduced on the premise of ensuring that the hardness and the strength of the cast aluminum alloy after the heat treatment are similar to those of the cast aluminum alloy treated by the water cooling.
Drawings
FIG. 1 is a flow chart of a method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
The selected cast aluminum alloy comprises the following components in percentage by weight: zn: 3.5% -4.5%, Mg: 1.5% -2.2%, Mn: 0.2% -0.6%, Ti: 0.2 to 0.4 percent of Fe, less than or equal to 0.5 percent of Fe and the balance of Al.
Example 1:
a heat treatment method for cast aluminum alloy comprises the following steps:
s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours;
s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, blowing air by using a fan, and cooling to room temperature at a cooling rate of 20 ℃/min;
s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 150 ℃ at the heating rate of 5 ℃/min, preserving heat for 5 hours, putting into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace.
Example 2:
a heat treatment method for cast aluminum alloy comprises the following steps:
s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours;
s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, blowing air by using a fan, and cooling to room temperature at a cooling rate of 20 ℃/min;
s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 160 ℃ at the heating rate of 5 ℃/min, preserving heat for 5 hours, putting into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace.
Example 3:
a heat treatment method for cast aluminum alloy comprises the following steps:
s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours;
s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, blowing air by using a fan, and cooling to room temperature at a cooling rate of 20 ℃/min;
s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 155 ℃ at the heating rate of 5 ℃/min, preserving heat for 5 hours, putting into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace.
Comparative example:
a heat treatment method for cast aluminum alloy comprises the following steps:
s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours;
s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, putting the cast aluminum alloy part, the test bar or the test block into water, and cooling the cast aluminum alloy part, the test bar or the test block to room temperature at a cooling rate of 400 ℃/min;
s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 150-160 ℃ at the heating rate of 5 ℃/min, preserving heat for 5h, putting the heated part into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace.
After the same cast aluminum alloy test block is subjected to heat treatment in examples 1 to 3 or comparative examples, the mechanical properties of each test block are as follows:
as shown in the data in the table, compared with the prior art, the invention can ensure that the hardness and the strength of the cast aluminum alloy after heat treatment are similar, improve the elongation percentage, greatly reduce the deformation to 1/20 which is about the original deformation, effectively reduce the time required by subsequent machining and reduce the cost.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (2)
1. A heat treatment method for cast aluminum alloy is characterized by comprising the following steps:
s1, solid solution: putting the cast aluminum alloy part, the test bar or the test block into a heating furnace, heating to 535 ℃ at a heating rate of 4.5 ℃/min, and keeping the temperature for 8 hours;
s2, quenching: taking the cast aluminum alloy part, the test bar or the test block subjected to the solution treatment out of the heating furnace, blowing air by using a fan, and cooling to room temperature at a cooling rate of 20 ℃/min;
s3, aging: and (3) putting the cast aluminum alloy part, the test bar or the test block after quenching treatment into a heating furnace, heating to 150-160 ℃ at the heating rate of 5 ℃/min, preserving heat for 5h, putting the heated part into the heating furnace after preserving heat, and cooling to room temperature along with the heating furnace.
2. The method for heat treatment of the cast aluminum alloy according to claim 1, wherein the cast aluminum alloy comprises the following components in percentage by weight: zn: 3.5% -4.5%, Mg: 1.5% -2.2%, Mn: 0.2% -0.6%, Ti: 0.2 to 0.4 percent of Fe, less than or equal to 0.5 percent of Fe and the balance of Al.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463803.2A CN114622150A (en) | 2020-12-14 | 2020-12-14 | Cast aluminum alloy heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463803.2A CN114622150A (en) | 2020-12-14 | 2020-12-14 | Cast aluminum alloy heat treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114622150A true CN114622150A (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011463803.2A Pending CN114622150A (en) | 2020-12-14 | 2020-12-14 | Cast aluminum alloy heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114622150A (en) |
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2020
- 2020-12-14 CN CN202011463803.2A patent/CN114622150A/en active Pending
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