CN115747682A - Homogenizing method of 2196 aluminum alloy - Google Patents
Homogenizing method of 2196 aluminum alloy Download PDFInfo
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- CN115747682A CN115747682A CN202211548389.4A CN202211548389A CN115747682A CN 115747682 A CN115747682 A CN 115747682A CN 202211548389 A CN202211548389 A CN 202211548389A CN 115747682 A CN115747682 A CN 115747682A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 238000000265 homogenisation Methods 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000002791 soaking Methods 0.000 claims description 3
- 238000011534 incubation Methods 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 32
- 239000000956 alloy Substances 0.000 abstract description 32
- 238000005204 segregation Methods 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 8
- 238000000137 annealing Methods 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- 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
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Abstract
The invention provides a homogenizing method of 2196 aluminum alloy, which comprises the following steps: preheating 2196 aluminum alloy to 280-300 ℃ in a heating furnace, heating the obtained aluminum alloy to 380-420 ℃ and preserving heat, heating the obtained aluminum alloy to 490-530 ℃ and preserving heat, and finally cooling to obtain the homogenized aluminum alloy. The homogenizing method of the 2196 aluminum alloy provided by the application avoids serious element segregation of the 2196 aluminum alloy through preheating, twice annealing homogenizing treatment and cooling treatment and temperature limitation, and ensures sufficient homogenization of chemical components of the alloy.
Description
Technical Field
The invention relates to the technical field of aluminum alloys, in particular to a homogenizing method of a 2196 aluminum alloy.
Background
2196 the alloy is a wrought alloy with the highest ageing strengthening effect, and has the characteristics of low density, high strength, good processability, etc. The alloy mainly contains Mn, mg, ag, zr, cu and other elements, however, due to the high alloying degree of 2196, the Cu element is easy to enrich in the grain boundary in the solidification process, and the problems of serious dendrite segregation, and nonuniform chemical components and tissue distribution in the grain boundary and the grain boundary exist, which can seriously reduce the plasticity of the alloy, deteriorate the hot-working performance, reduce the strength and the plasticity of an alloy product, and increase the anisotropy and the corrosion sensitivity. Therefore, in order to eliminate the influence of alloy structure defects on the subsequent processing performance of the alloy, reasonable homogenization heat treatment needs to be carried out before the alloy is subjected to thermal deformation.
Homogenizing heat treatment is an extremely important process for preparing and applying the alloy. However, there is currently no suitable homogenization heat treatment process for 2196 alloys. Therefore, the uniform heat treatment process for the 2196 alloy is of great significance for avoiding serious element microsegregation.
Disclosure of Invention
The invention aims to provide a homogenizing method of 2196 aluminum alloy, which can avoid serious element microsegregation and ensure the full homogenization of alloy chemical components.
In view of the above, the present application provides a method for homogenizing 2196 aluminum alloy, comprising the steps of:
a) Adding 2196 aluminum alloy into a heating furnace, wherein the temperature of the heating furnace is 280-300 ℃;
b) Heating the 2196 aluminum alloy obtained in the step A) to 380-420 ℃, and preserving the heat for 9.0-11.0 h;
c) Heating the 2196 aluminum alloy obtained in the step B) to 490-530 ℃, and preserving the heat for 23.0-25.0 h;
d) Cooling the 2196 aluminum alloy obtained in the step C).
Preferably, the heating furnace is a soaking furnace.
Preferably, in the step B), the heat preservation time is 9.5-10.5 h.
Preferably, in the step C), the heat preservation time is 23.5-24.5 h.
Preferably, the cooling mode is air cooling.
Preferably, thermocouples for measuring the temperature of the 2196 aluminum alloy are arranged at two ends of the 2196 aluminum alloy.
Preferably, the 2196 aluminum alloy is provided with a drill hole for placing the thermocouple, the diameter of the drill hole is 5 mm-10 mm, and the depth of the drill hole is 30 mm-50 mm.
Preferably, in step B), the heating temperature is 385-405 ℃.
Preferably, in the step C), the heating temperature is 495-515 ℃.
The application provides a homogenizing method of 2196 aluminum alloy, which comprises the following steps: preheating 2196 aluminum alloy to 280-300 ℃ in a heating furnace, heating the obtained aluminum alloy to 380-420 ℃ and preserving heat, heating the obtained aluminum alloy to 490-530 ℃ and preserving heat, and finally cooling to obtain the homogenized aluminum alloy. The homogenizing method of the 2196 aluminum alloy avoids serious element segregation of the 2196 aluminum alloy through preheating, twice annealing homogenizing treatment and cooling treatment and temperature limitation, and ensures full homogenization of chemical components of the alloy.
Drawings
FIG. 1 is an SEM photograph of a homogenized 2196 aluminum alloy of example 1 of the present invention;
FIG. 2 is an SEM photograph of a homogenized 2196 aluminum alloy of example 2 of the present invention;
FIG. 3 is an SEM photograph of a homogenized 2196 aluminum alloy of example 3 of the present invention;
FIG. 4 is an SEM photograph of a homogenized 2196 aluminum alloy of comparative example 1 of the present invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
In view of the problems of micro segregation of elements and poor component uniformity in the homogenization heat treatment of the 2196 aluminum alloy in the prior art, the application provides a homogenization method of the 2196 aluminum alloy, which realizes homogenization heat treatment by preheating the 2196 aluminum alloy, carrying out twice homogenization annealing at different temperatures and cooling, avoids serious element segregation and ensures the homogenization of chemical components of the alloy. Specifically, the application provides a homogenizing method of 2196 aluminum alloy, which comprises the following steps:
a) Adding 2196 aluminum alloy into a heating furnace, wherein the temperature of the heating furnace is 280-300 ℃;
b) Heating the 2196 aluminum alloy obtained in the step A) to 380-420 ℃, and preserving the heat for 9.0-11.0 h;
c) Heating the 2196 aluminum alloy obtained in the step B) to 490-530 ℃, and preserving the heat for 23.0-25.0 h;
d) Cooling the 2196 aluminum alloy obtained in the step C).
In the process of homogenizing 2196 aluminum alloy, the aluminum alloy is firstly put into a heating furnace for preheating, wherein the preheating temperature is 280-300 ℃, and more specifically, the preheating temperature is 285-295 ℃. The heating furnace is a soaking pit furnace, and the temperature control precision is +/-5 ℃.
The method comprises the following steps of carrying out primary homogenization heat treatment on the preheated 2196 aluminum alloy, namely heating the 2196 aluminum alloy to 380-420 ℃, and keeping the temperature for 9.0-11.0 h; more specifically, the heating temperature is 385-405 ℃, and the heat preservation temperature is 9.5-10.5 h; the temperature of the first-stage homogenization heat treatment is mainly directed to the uniformity distribution of the zirconium-containing precipitates, and if the first-stage temperature is not in this range, the uniformity distribution of the zirconium precipitates is affected.
According to the invention, the 2196 aluminum alloy is subjected to secondary homogenization heat treatment, the temperature of the secondary homogenization heat treatment is 490-530 ℃, and the temperature is kept for 23.0-25.0 h; specifically, the temperature of the second-stage homogenization heat treatment is 495-515 ℃, and the heat preservation time is 23.5-24.5 h. The temperature of the second-stage homogenization heat treatment is mainly directed at the uniformity distribution of copper and lithium elements, and if the temperature of the second stage is lower than the range, the homogenization degree of the copper and lithium elements is influenced, and if the temperature of the second stage is higher than the range, overburning may be generated.
In the application, in the homogenization treatment process, thermocouples for measuring the temperature of 2196 aluminum alloy are arranged at two ends of 2196 aluminum alloy, a drill hole for placing the thermocouple is formed in the 2196 aluminum alloy, the diameter of the drill hole is 5-10 mm, and the depth of the drill hole is 30-50 mm; and the gap between the drilling hole and the thermocouple joint is sealed by adopting a silicon felt cotton plug.
For further understanding of the present invention, the following examples are provided to illustrate the homogenization method of 2196 aluminum alloy, and the scope of the present invention is not limited by the following examples.
Example 1
The homogenization heat treatment process of the alloy provided by the embodiment comprises the following steps:
step one, when the temperature of a heating furnace is 285 ℃,2196 alloy is loaded into the heating furnace;
step two, the temperature of the first-stage homogenization heat treatment is 385-390 ℃, and the heat preservation time is 10 hours;
thirdly, the temperature of the second-stage homogenization heat treatment is 496-501 ℃, and the heat preservation time is 24 hours;
the fourth step: and (5) air cooling after discharging.
In the method for homogenizing 2196 alloy provided in this embodiment, severe element segregation of 2196 alloy is avoided by two-stage homogenization treatment and cooling treatment, and sufficient homogenization of alloy chemical composition is ensured, as shown in fig. 1.
Example 2
The homogenization heat treatment process of the alloy provided by the embodiment comprises the following steps:
step one, when the temperature of a heating furnace is 291 ℃,2196 alloy is loaded into the heating furnace;
step two, the temperature of the first-stage homogenization heat treatment is 397-402 ℃, and the heat preservation time is 10 hours;
thirdly, the temperature of the second-stage homogenization heat treatment is 510-515 ℃, and the heat preservation time is 24 hours;
the fourth step: and (5) air cooling after discharging.
In the method for homogenizing 2196 alloy provided by the embodiment, severe element segregation of 2196 alloy is avoided and sufficient homogenization of alloy chemical components is ensured by two-stage homogenization treatment and cooling treatment, as shown in fig. 2.
Example 3
The homogenization heat treatment process of the alloy provided by the embodiment comprises the following steps:
step one, when the temperature of a heating furnace is 285 ℃,2196 alloy is loaded into the heating furnace;
step two, the temperature of the first-stage homogenization heat treatment is 412-417 ℃, and the heat preservation time is 10 hours;
thirdly, the temperature of the second-stage homogenization heat treatment is 517-522 ℃, and the heat preservation time is 24 hours;
the fourth step: and (5) air cooling after discharging.
In the method for homogenizing 2196 alloy provided in this embodiment, severe element segregation of 2196 alloy is avoided by two-stage homogenization treatment and cooling treatment, and sufficient homogenization of alloy chemical composition is ensured, as shown in fig. 3.
Comparative example 1
The homogenization heat treatment process of the alloy provided by the comparative example comprises the following steps:
step one, when the temperature of a heating furnace is 295 ℃,2196 alloy is filled into the heating furnace;
step two, the temperature of the first-stage homogenization heat treatment is 368-373 ℃, and the heat preservation time is 10 hours;
thirdly, the temperature of the second-stage homogenization heat treatment is 537-542 ℃, and the heat preservation time is 24 hours;
the fourth step: and (5) air cooling after discharging.
The two-stage homogenization treatment process adopted by the comparative example is out of the process range provided by the application, and generates more serious element segregation and overburning phenomenon, as shown in fig. 4.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method of homogenizing a 2196 aluminum alloy, comprising the steps of:
a) Adding 2196 aluminum alloy into a heating furnace, wherein the temperature of the heating furnace is 280-300 ℃;
b) Heating the 2196 aluminum alloy obtained in the step A) to 380-420 ℃, and preserving the heat for 9.0-11.0 h;
c) Heating the 2196 aluminum alloy obtained in the step B) to 490-530 ℃, and preserving the heat for 23.0-25.0 h;
d) Cooling the 2196 aluminum alloy obtained in the step C).
2. The homogenization method according to claim 1, wherein the heating furnace is a soaking furnace.
3. The homogenization method according to claim 1, wherein the incubation time in step B) is 9.5 to 10.5 hours.
4. The homogenization method according to claim 1, wherein the incubation time in step C) is 23.5 to 24.5 hours.
5. The homogenization method of claim 1, wherein the cooling is air cooling.
6. The homogenization method of claim 1, wherein both ends of the 2196 aluminum alloy are provided with thermocouples for measuring the temperature of the 2196 aluminum alloy.
7. The homogenization method of claim 6, wherein the 2196 aluminum alloy is provided with a bore hole for placing the thermocouple, and the diameter of the bore hole is 5mm to 10mm, and the depth of the bore hole is 30mm to 50mm.
8. The homogenization method according to claim 1, wherein the heating temperature in step B) is 385 to 405 ℃.
9. The homogenization method according to claim 1, wherein the heating temperature in step C) is from 495 ℃ to 515 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211548389.4A CN115747682A (en) | 2022-12-05 | 2022-12-05 | Homogenizing method of 2196 aluminum alloy |
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| CN202211548389.4A CN115747682A (en) | 2022-12-05 | 2022-12-05 | Homogenizing method of 2196 aluminum alloy |
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| CN110331351A (en) * | 2019-08-21 | 2019-10-15 | 中南大学 | A kind of preparation method of Al-Cu-Li system aluminium lithium alloy plate |
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2022
- 2022-12-05 CN CN202211548389.4A patent/CN115747682A/en active Pending
Patent Citations (7)
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| CN110331351A (en) * | 2019-08-21 | 2019-10-15 | 中南大学 | A kind of preparation method of Al-Cu-Li system aluminium lithium alloy plate |
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