CN1966736A - Process for preparing nano-crystalline aluminium materials - Google Patents
Process for preparing nano-crystalline aluminium materials Download PDFInfo
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- CN1966736A CN1966736A CN 200510047727 CN200510047727A CN1966736A CN 1966736 A CN1966736 A CN 1966736A CN 200510047727 CN200510047727 CN 200510047727 CN 200510047727 A CN200510047727 A CN 200510047727A CN 1966736 A CN1966736 A CN 1966736A
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- Prior art keywords
- nano
- rolling
- crystalline aluminium
- aluminium materials
- preparing nano
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 title claims abstract description 21
- 239000004411 aluminium Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005097 cold rolling Methods 0.000 claims abstract description 6
- 238000005098 hot rolling Methods 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 239000002159 nanocrystal Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract 1
- 235000010210 aluminium Nutrition 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 5
- 239000007769 metal material Substances 0.000 description 4
- 239000002707 nanocrystalline material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for producing nano-crystal aluminium material. It adopts the general industrial aluminium material, and is carried out as the following steps: (1) hot-rolling, (2) pyro-annealing at 400-500DEG C for 2-5, and (3) deep cold rolling to deformation over 90% to obtain the nano-crystal aluminium material. The invention has the characteristics of wide raw material source, simple method, and simple operation. The invention can produce large scaled samples and is fit for industrialization.
Description
Technical field
The present invention relates to the rolling technique of nanocrystalline and metallic substance, specifically a kind of method for preparing nano-crystalline aluminium materials.
Background technology
In existing new and high technology, the someone thinks that nanocrystalline material will become structured material, need make big sample, present method is difficult to accomplish, therefore its mechanical property great majority can only be measured Vickers' hardness, are difficult to do the standard tensile performance test, and the application of structured material aspect is restricted.In recent years, Russia R.Z.Valiev advocates (R.Z.Valiev, etal. Prog.Mater Sci., 45 (2000) 103-189)) prepare nano crystal metal material with degree of depth cold working method, find after only having done forging test: its weave construction is very inhomogeneous, thinks that all traditional complete processings all are not suitable for preparing nanocrystalline material.But in fact, the severe rolling method prepares nano-crystalline aluminium materials and has not yet to see report.
Summary of the invention
In order to overcome above-mentioned deficiency, the method for preparing nano-crystalline aluminium materials that the range of choice that the purpose of this invention is to provide a kind of material is wide, method simple, suitable for industrial requires.
To achieve these goals, technical scheme of the present invention is to select the general industry metallic substance, operation as follows: 1) hot rolling; 2) high temperature annealing, temperature are in 300～350 ℃ of scopes, and the time is 2～5 hours; 3) deep cold rolling, cold roller and deformed degree are more than 90%, obtain nano-crystalline aluminium materials.
The present invention has following advantage:
1. the range of choice of material is wide.But because the equal rolling processing of any aluminium, the method that could prepare nanocrystalline material with the special material of prior art is compared, and the usefulness traditional technology that the present invention has broken R.Z.Valiev can not be made the view of nano material.
2. method is simple, is convenient to operation.Because since 40, the cold working of producing steel the fifties is a lot, technical maturity, the present invention is suitable for conventional calendering process, it does not relate to some problems that other technologies are brought, and as the stability of powder technology, presses and ties density etc., so very convenient.
3. can make big size sample, the suitable for industrial requirement.Adopt the present invention can satisfy user's required (only relevant) with the rolling mill that uses with conventional thermal treatment, hot rolling and the cold rolling sample size of producing.Sample size can be done the standard tensile performance test.
4. the present invention adopts traditional technology, so cost is low.
Embodiment
Embodiment 1
Operation as follows:
1. hot rolling: select fine aluminium (present embodiment employing purity is 99% Φ 20 fine aluminiums), described fine aluminium is rolled to 4 mm thick;
2. thermal treatment: high temperature annealing, high temperature to 300 ℃ kept 2 hours;
3. cold rolling: 4 mm thick pure aluminum materials are cold rolled to 0.8 millimeter, and it is cold roller and deformed to be 98% by length computation, promptly obtains nanocrystalline pure aluminum material.
The embodiment of the invention can be made the nanocrystalline fine aluminium of [0.8 * 35mm * long arbitrarily], and by X ray and TEM (transmission electron microscope) analysis, crystal grain of the present invention has reached the nanoscale scope, and the grain fineness number test result sees Table 1.
Table 1 is embodiment 1 a grain fineness number test result
| Grain fineness number (on average) * | Testing method | Measuring unit |
| 78nm | X ray | Metal Inst., Chinese Academy of Sciences |
Wherein:
*Deducted unrelieved stress effect in the sample.
The inventive method has 3 characteristics:
(1) adopts common material (fine aluminium); (2) common process technology (rolling), grain-size of the present invention are less than the special processing of R.Z.Valiev, i.e. (Sever Plastic Deformation, abbreviation: SPD), the sample that adopts the SPD method to use is generally Φ 20 * (70～100) mm in degree of depth viscous deformation
3(3) can make large sample.Sample of the present invention just can be done the standard tensile test.As long as the ability of cold working equipment is enough big, big more a lot of nano material all may be made.
Embodiment 2
Difference from Example 1 is:
1. hot rolling: select general industry metallic substance such as general industry technology fine aluminium (present embodiment adopts Φ 30), described fine aluminium is rolled to 4 mm thick;
2. thermal treatment: high temperature annealing, high temperature to 350 ℃ kept 5 hours;
3. cold rolling: 4 mm thick pure aluminum materials are cold rolled to 1.0 millimeters, and it is cold roller and deformed to be 95% by length computation, promptly obtains nanocrystalline pure aluminum material.
The embodiment of the invention can be made the nanocrystalline fine aluminium of [1.0 * 45mm * long arbitrarily], and by X ray and TEM (transmission electron microscope) analysis, crystal grain of the present invention has reached the nanoscale scope, and the grain fineness number test result sees Table 2.
Table 2 is embodiment 2 grain fineness number test results
| Grain fineness number (on average) * | Testing method | Measuring unit |
| 80nm | X ray | Metal Inst., Chinese Academy of Sciences |
Wherein:
*Deducted unrelieved stress effect in the sample.
Claims (1)
1. a method for preparing nano-crystalline aluminium materials is selected the general industry aluminum, it is characterized in that: operation as follows: 1) hot rolling; 2) high temperature annealing, temperature are in 300～350 ℃ of scopes, and the time is 2～5 hours; 3) deep cold rolling, cold roller and deformed degree are more than 90%, obtain nano-crystalline aluminium materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047727 CN1966736A (en) | 2005-11-16 | 2005-11-16 | Process for preparing nano-crystalline aluminium materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047727 CN1966736A (en) | 2005-11-16 | 2005-11-16 | Process for preparing nano-crystalline aluminium materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1966736A true CN1966736A (en) | 2007-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510047727 Pending CN1966736A (en) | 2005-11-16 | 2005-11-16 | Process for preparing nano-crystalline aluminium materials |
Country Status (1)
| Country | Link |
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| CN (1) | CN1966736A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104087773A (en) * | 2014-07-07 | 2014-10-08 | 北京理工大学 | Preparation method of nanocrystalline aluminum |
| CN105586550A (en) * | 2014-10-21 | 2016-05-18 | 中国科学院金属研究所 | Nanocrystalline aluminum material and application thereof |
-
2005
- 2005-11-16 CN CN 200510047727 patent/CN1966736A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104087773A (en) * | 2014-07-07 | 2014-10-08 | 北京理工大学 | Preparation method of nanocrystalline aluminum |
| CN105586550A (en) * | 2014-10-21 | 2016-05-18 | 中国科学院金属研究所 | Nanocrystalline aluminum material and application thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |