CN118166297A - Method for improving anisotropy of Al-Cu-Li alloy plate - Google Patents
Method for improving anisotropy of Al-Cu-Li alloy plate Download PDFInfo
- Publication number
- CN118166297A CN118166297A CN202410455026.9A CN202410455026A CN118166297A CN 118166297 A CN118166297 A CN 118166297A CN 202410455026 A CN202410455026 A CN 202410455026A CN 118166297 A CN118166297 A CN 118166297A
- Authority
- CN
- China
- Prior art keywords
- anisotropy
- alloy
- percent
- improving
- solution treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000001989 lithium alloy Substances 0.000 title claims abstract description 46
- 229910017539 Cu-Li Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010791 quenching Methods 0.000 claims description 39
- 230000000171 quenching effect Effects 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 229910045601 alloy Inorganic materials 0.000 claims description 23
- 239000000956 alloy Substances 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 21
- 238000005097 cold rolling Methods 0.000 claims description 19
- 230000032683 aging Effects 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 10
- 229910001148 Al-Li alloy Inorganic materials 0.000 description 3
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 208000000785 Invasive Pulmonary Aspergillosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Metal Rolling (AREA)
Abstract
The invention belongs to the field of processing of Al-Cu-Li alloy plates, and particularly discloses a method for improving anisotropy of an Al-Cu-Li alloy plate, which comprises the following steps: the process disclosed by the invention can be used for improving the anisotropy of the Al-Cu-Li alloy plate, is simple and convenient to operate, and is suitable for practical production and application.
Description
Technical Field
The invention belongs to the field of processing of Al-Cu-Li alloy plates, and particularly relates to a method for improving anisotropy of an Al-Cu-Li alloy plate.
Background
Lithium aluminum (Al-Li) alloys have a number of advantages over conventional high strength aluminum alloys, including lower density, higher specific strength, specific modulus, and better corrosion resistance. These characteristics make aluminum-lithium alloys very popular in aerospace applications, which are generally considered ideal structural materials for aerospace vehicles. However, early generations of aluminum lithium alloys developed had limitations associated with poor plasticity, toughness, and significant anisotropy, which made them unsuitable for the design and manufacturing requirements of many aerospace components, and the anisotropy of the alloy had to be reduced in order to meet the service requirements under different conditions. The adjustment of alloy components and the adjustment of strengthening process are main methods for improving the alloy performance.
The anisotropy of mechanical properties in Al-Cu-Li alloys is one of the main reasons for the limited applications of Al-Cu-Li alloys. The anisotropy is improved in the existing mode such as cross rolling, and the cross rolling is found to have little contribution to the anisotropy and cannot ensure the strength; after the cross-cold rolling pre-deformation, the anisotropy of the alloy is improved. But the key aerospace alloy parts are not required to have strength and the performance difference in all directions can not be excessive.
Disclosure of Invention
The invention aims at solving the problem of large anisotropy gap of the mechanical properties of the existing Al-Cu-Li alloy and provides a method for improving the anisotropy of an Al-Cu-Li alloy plate.
The aim of the invention is achieved by the following technical scheme:
a method for improving the anisotropy of an Al-Cu-Li alloy plate comprises the steps of sequentially carrying out solution treatment, pre-deformation treatment and artificial aging treatment on the Al-Cu-Li alloy plate.
Further, the solution treatment is as follows: and (3) preserving heat for 1h at 510-530 ℃ under the condition that the alloy plate is placed, then carrying out water quenching to room temperature, wherein the quenching transfer time is less than 3s, the artificial aging temperature is 150 ℃ and the time is 10-300 h.
Further, after the solution treatment, the alloy sheet is rotated by 0-90 degrees along the rolling direction to perform cold rolling, and the reduction of the cold rolling pass is 3-15%.
Preferably, after the solution treatment, the alloy sheet is rotated by 0-45 degrees along the rolling direction for cold rolling, and the reduction of the cold rolling pass is 3-10%.
Further, the artificial aging treatment comprises the following steps: aging at 150 ℃ for 10-300 h, and then quenching to room temperature.
Further, the Al-Cu-Li alloy comprises the following components in percentage by mass: the Al-Cu-Li alloy is characterized by comprising the following components in percentage by mass: 3.0 to 4.5 percent of Cu, 0.8 to 1.8 percent of Li, 0.08 to 0.16 percent of Zr0.2 to 0.5 percent of Mg, 0.4 to 0.6 percent of Zn and 0.1 to 0.2 percent of In. The total amount of impurity elements is less than or equal to 0.15 percent, and the balance is Al.
Further, the thickness of the Al-Cu-Li alloy plate is 0.5-5 mm.
The invention has the beneficial effects that:
(1) The invention adopts the pre-deformation treatment along different rolling directions to cold-roll the Al-Cu-Li alloy plate subjected to the solution treatment by rotating for 0-90 degrees along the rolling direction, thereby improving the strength and the anisotropism of the Al-Cu-Li alloy plate.
(2) The invention optimizes the pre-deformation amount of the pre-deformation treatment, and different pre-deformation amounts provide different dislocation amounts, thereby improving the strength and the anisotropism of the Al-Cu-Li alloy plate.
Detailed Description
The invention is further described below with reference to examples and comparative examples, wherein the Al-Cu-Li alloy sheet comprises the following components in percentage by mass: 3.0 to 4.5 percent of Cu, 0.8 to 1.8 percent of Li, 0.08 to 0.16 percent of Zr, 0.2 to 0.5 percent of Mg, 0.4 to 0.6 percent of Zn and 0.1 to 0.2 percent of In. The total amount of impurity elements is less than or equal to 0.15 percent, and the balance is Al.
Example 1
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy plate by 0 degree along the rolling direction for cold rolling, wherein the added pre-deformation amount is 3%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 2
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 0 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 15%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 3
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 45 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 3%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 4
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 45 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 8%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 5
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 45 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 10%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 6
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 45 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 15%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 7
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy plate by 90 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 3%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Example 8
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 90 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 15%, and finally, aging for 20 hours at 150 ℃ and then quenching with water to room temperature to obtain a sample.
Comparative example 1
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample after the solution treatment to room temperature, wherein the quenching transfer time is less than 3s; and (3) carrying out water quenching to room temperature after aging for 20 hours at 150 ℃ to obtain a sample.
Comparative example 2
The Al-Cu-Li alloy is rolled to 2.5mm by a cross rolling mode, and is subjected to primary hot rolling at 490 ℃ along the rolling direction, is rotated by 90 degrees and is subjected to secondary hot rolling at 490 ℃ again, and the pressing amount is controlled to be the same for two times. Carrying out solution treatment at 515 ℃/1h, carrying out water quenching on the sample after solution treatment to room temperature, wherein the quenching transfer time is less than 3s, and finally carrying out water quenching to room temperature after aging for 20h at 150 ℃ to obtain the sample.
Comparative example 3
Carrying out solution treatment on an Al-Cu-Li alloy plate with the thickness of 2.5mm at 515 ℃/1h, and carrying out water quenching on a sample to room temperature after the solution treatment, wherein the quenching transfer time is less than 3s; and (3) rotating the alloy sheet by 0 degree along the rolling direction for cold rolling, wherein the added pre-deformation amount is 1.5%, then rotating the alloy sheet by 90 degrees along the rolling direction for cold rolling, wherein the added pre-deformation amount is 1.5%, and finally aging for 20 hours at 150 ℃ and then quenching the alloy sheet with water to room temperature to obtain a sample.
The tensile samples of the examples and the comparative examples are selected in a linear cutting mode and have three directions of 0 degree, 45 degrees and 90 degrees with the rolling direction. The plane anisotropy Index (IPA) is generally calculated as follows:
wherein SMax is the maximum value of yield strength in different directions; SMin is the minimum of yield strength in different directions; SMid is the yield strength between maximum and minimum values in different directions, N is the number of test directions, where n=3. The prepared examples and comparative examples of Al-Cu-Li alloys were tested three times according to the measurement method of room temperature tensile test of metallic materials of GB/T228.1-2010, each sample was tested to ensure accurate experimental data, and the yield strengths and plane anisotropy Indexes (IPAs) of the above-mentioned examples and comparative examples of Al-Cu-Li alloys are shown in Table 1.
TABLE 1 yield strength and in-plane anisotropy Index (IPA) for inventive and comparative examples
From comparison of the results of the yield strength tests of examples 1 to 8 and comparative examples, it is evident that the anisotropy of the mechanical properties of the alloy of the examples can be significantly improved in the examples of the present invention as compared with the comparative examples. Wherein examples 3-6 are again compared with each other, example 3 is a preferred embodiment of the present invention.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (7)
1. A method for improving the anisotropy of an Al-Cu-Li alloy plate is characterized in that the Al-Cu-Li alloy plate is subjected to solution treatment, pre-deformation and artificial aging treatment.
2. The method for improving the anisotropy of an Al-Cu-Li alloy sheet according to claim 1, wherein the solution treatment is carried out at 510-530 ℃, the temperature is kept for 1h, then water quenching is carried out to room temperature, and the quenching transfer time is less than 3s.
3. The method for improving anisotropy of Al-Cu-Li alloy sheet according to claim 1, wherein the pre-deformation treatment is to rotate the alloy sheet by 0 ° to 90 ° in the rolling direction for cold rolling after the solution treatment, and the reduction amount by cold rolling pass is 3% to 15%.
4. The method for improving anisotropy of an Al-Cu-Li alloy sheet according to claim 1, wherein the pre-deformation treatment is to rotate the alloy sheet by 0 ° to 45 ° in the rolling direction for cold rolling, respectively, after the solution treatment, and the cold rolling pass reduction is 3% to 10%.
5. The method for improving the anisotropy of an Al-Cu-Li alloy sheet according to claim 1, wherein the artificial aging is water quenching to room temperature after aging for 10 to 300 hours at 150 ℃.
6. The method for improving the anisotropy of the Al-Cu-Li alloy sheet according to claim 1, wherein the Al-Cu-Li alloy comprises the following components in percentage by mass: the method is characterized in that: the Al-Cu-Li alloy comprises the following components in percentage by mass: 3.0 to 4.5 percent of Cu, 0.8 to 1.8 percent of Li and Zr
0.08 To 0.16 percent, 0.2 to 0.5 percent of Mg, 0.4 to 0.6 percent of Zn, 0.1 to 0.2 percent of In, less than or equal to 0.15 percent of impurity element and the balance of Al.
7. The method for improving anisotropy of an Al-Cu-Li alloy sheet as defined in claim 1, wherein the Al-Cu-Li alloy sheet has a thickness of 0.5 to 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410455026.9A CN118166297A (en) | 2024-04-16 | 2024-04-16 | Method for improving anisotropy of Al-Cu-Li alloy plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410455026.9A CN118166297A (en) | 2024-04-16 | 2024-04-16 | Method for improving anisotropy of Al-Cu-Li alloy plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118166297A true CN118166297A (en) | 2024-06-11 |
Family
ID=91348513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410455026.9A Pending CN118166297A (en) | 2024-04-16 | 2024-04-16 | Method for improving anisotropy of Al-Cu-Li alloy plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118166297A (en) |
-
2024
- 2024-04-16 CN CN202410455026.9A patent/CN118166297A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5354954B2 (en) | Aluminum alloy plate for press forming | |
| CN110055479B (en) | 800 MPa-grade high-conductivity copper-chromium-zirconium alloy and preparation method thereof | |
| CN113106291B (en) | Tin-phosphor bronze strip with excellent comprehensive performance and preparation method thereof | |
| CN113106290B (en) | High-performance tin-phosphor bronze strip and preparation method thereof | |
| CN114855026B (en) | High-performance precipitation strengthening type copper alloy and preparation method thereof | |
| CN114592142A (en) | Medium-strength high-toughness titanium alloy with yield strength of 800MPa for ocean engineering and preparation process thereof | |
| CN118166297A (en) | Method for improving anisotropy of Al-Cu-Li alloy plate | |
| CN111441020B (en) | Method for preparing TC4 titanium alloy sputtering target material at low cost | |
| CN114525433B (en) | Finished product annealing treatment method of aluminum alloy plate strip for new energy battery | |
| CN113802027B (en) | Titanium bronze and preparation method thereof | |
| CN114438428B (en) | Preparation method of corrosion-resistant aluminum alloy | |
| CN112342433B (en) | High-thermal-stability equiaxial nanocrystalline Ti-Zr-W alloy and preparation method thereof | |
| CN113088841B (en) | Method for regulating and controlling creep anisotropy of cold-rolled pre-deformation alloy | |
| CN112063889B (en) | High-thermal-stability equiaxed nanocrystalline Ti6Al4V-Cr alloy and preparation method thereof | |
| CN110629084B (en) | Preparation method and product of high-thermal-conductivity wrought aluminum alloy | |
| CN112342431A (en) | High-thermal-stability equiaxial nanocrystalline Ti6Al4V-Cu alloy and preparation method thereof | |
| CN112195366A (en) | High-thermal-stability equiaxial nanocrystalline Ti-Zr-Ag alloy and preparation method thereof | |
| CN115323227B (en) | Aluminum alloy photovoltaic module frame and preparation method thereof | |
| Li et al. | Investigation on work softening behavior of aluminum and its alloys with iron | |
| CN112251638B (en) | High-thermal-stability equiaxial nanocrystalline Ti-Cu alloy and preparation method thereof | |
| CN115109964B (en) | High-strength conductive high-temperature softening resistant Cu-Ni-Si alloy and preparation method thereof | |
| CN112195365B (en) | High-thermal-stability equiaxial nanocrystalline Ti-Zr-Fe alloy and preparation method thereof | |
| CN115074577B (en) | Nickel strap and preparation method thereof | |
| CN112063891B (en) | High-thermal-stability equiaxial nanocrystalline Ti-Zr-Cr alloy and preparation method thereof | |
| CN109371283B (en) | High-strength high-toughness Ti5Mo5V5Cr3Al titanium alloy and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |