CN101660034B - Preparation method of texture controllable fine grain metal material based on large strain deformation and recrystallization - Google Patents
Preparation method of texture controllable fine grain metal material based on large strain deformation and recrystallization Download PDFInfo
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- CN101660034B CN101660034B CN2009101835873A CN200910183587A CN101660034B CN 101660034 B CN101660034 B CN 101660034B CN 2009101835873 A CN2009101835873 A CN 2009101835873A CN 200910183587 A CN200910183587 A CN 200910183587A CN 101660034 B CN101660034 B CN 101660034B
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- 239000007769 metal material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000001953 recrystallisation Methods 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 57
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000007669 thermal treatment Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 16
- 230000001419 dependent effect Effects 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 239000012467 final product Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 14
- 239000013078 crystal Substances 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 14
- 239000004411 aluminium Substances 0.000 description 12
- 238000001228 spectrum Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000010899 nucleation Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 229910001344 5052 aluminium alloy Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Abstract
A preparation method of texture controllable fine grain metal material based on large strain deformation and recrystallization includes large strain predeformation and recrystallization heat treatment. The preparation method is characterized in that the large strain predeformation includes that blanks are firstly subject to rolling by multi-pair rolling wheels, so that the blanks get thinner and deformation degree of the blanks rolled by multi-pair rolling wheels is not less than 50%; secondly an equal channel angular pressing mould is arranged at the outlet of the last pair of rolling wheel, so that the thinner blanks after rolling carry out ECAP deformation; and the recrystallization heat treatment includes that the blanks after the large strain deformation are fed into a thermal treatment furnace, temperature is maintained to be 150-500 DEG C for 0.5-2h, and then air cooling is carried out. The invention combines the advantages of the multi-pair wheel rolling technology and the equal channel angular pressing technology and can realize energy-saving, high-efficiency, continuous and uniform large strain deformation processing of metal material; and the prepared metal material has the characteristics of small grain crystal, strength and hardness far higher than supply state and wonderful texture orientation and the like.
Description
Technical field
The present invention relates to a kind of method of modifying of metallic substance, especially a kind of deflection that combines is greater than 10% the metallic substance denaturation method of answering shape and recrystallize technology in advance, specifically a kind of preparation method of the texture controllable fine grain metal material based on large strain deformation and recrystallization.
Background technology
As everyone knows, the metallic substance after the predeformation being carried out recrystallize thermal treatment, is to obtain the most effectively one of processing method of fine crystalline metal material.When other conditions were identical, the grain fineness number of recrystallize was directly related with the predeformation degree of metallic substance.When degree of deformation 2% when following because lattice distortion is very little, be not enough to cause recrystallize, so grain size is constant substantially; When degree of deformation in 2%～10% scope, little and extremely inhomogeneous because of deflection, nucleation rate is low, the crystal grain behind the recrystallize is very thick; After degree of deformation surpassed 10%, along with the increase of degree of deformation, lattice distortion increased, and nucleation rate improves thereupon, and crystal grain is by refinement behind the recrystallize.Therefore, for the technology of intending obtaining fine crystalline metal material, realize that the big strain predeformation processing of metallic substance is vital link by recrystallize.Simultaneously, reasonably the texture orientation has decisive influence to the punching performance of metallic substance, magnetic property etc.
At present, the technology of realization metal material large-strain deformation processing mainly comprises many to rolling wheel rolling technology and equal channel angular extrusion technique (Equal Channel Angular Pressing is called for short ECAP).Wherein, many rolling wheel rolling technology is had can realize the quantity-produced feature, but exist the dependent variable that material is applied limited, be difficult to realize that the square section is equal to big strain (dependent variable on its top layer is big and the dependent variable of heart portion is little) and to the low deficiency that waits of texture orientation controlling ability of shape-changing material; And for the ECAP technology, though can be under the situation that does not change material shape metallic substance being implemented the square section be equal to big strain processing and can regulate and control the orientation of modulated structure, but this technology is because limited extruding punch stroke, and it is defined as a kind of discontinuous, low production efficiency, expensive large strain deformation working method.Although since the mid-90 in 20th century, domestic and international many research institutions and scholar just continuously ECAP technology have done some useful explorations, are not difficult to industrial applications but all fundamentally solve the related gordian technique of continuous ECAP deformation processing or still rest on the laboratory study stage.
Therefore, up to the present, do not obtain a kind of preparation method as yet based on the texture controllable fine grain metal material of large strain deformation and recrystallization for actual industrial production.
Summary of the invention
The objective of the invention is to be difficult to obtain the problem of the tiny metallic substance of the controlled crystal grain of texture at present big strain processing and subsequent heat treatment, invent a kind of preparation method of the texture controllable fine grain metal material based on large strain deformation and recrystallization, to obtain grained material and the XRD spectrum (being X-ray diffraction spectrum) of material is close with perfect condition.
Technical scheme of the present invention is:
A kind of preparation method of the texture controllable fine grain metal material based on large strain deformation and recrystallization, comprise big strain predeformation and recrystallize thermal treatment, it is characterized in that described big strain predeformation be make blank at first through too much to rolling wheel rolling attenuation, make simultaneously through too much deflection and be not less than 0.4 the blank of rolling wheel rolling; Secondly equal channel angular extrusion die is installed in the end a pair of rolling exit of taking turns, and makes through the rolling blank that rolls after thin of taking turns directly to enter under rolling wheel drive and carry out big shear strain in the described extrusion mould and obtain big strain predeformation blank to realize the square section and be equal to big strain and the texture orientation of blank changed; Described recrystallize thermal treatment is that the blank that obtains through aforementioned big strain predeformation method is sent in the heat treatment furnace, under 150～500 ℃, and insulation 0.5～2h, air cooling gets final product then.
Rolling take turns synchronous rotation or asynchronous rotation are taken turns and descended to described rolling take turns centering last rolling.
Beneficial effect of the present invention:
(1) the present invention combines many advantages to rolling wheel rolling technology and equal channel angular extrusion technique, has realized metallic substance is carried out the big strain predeformation of even successive, with deflection＞50% of the metallic substance of method of the present invention processing.
(2) in the predeformation process, by adopting integrated structure, being about to continuous rolling combines with waiting channel deformation, utilize the motivating force of continuous rolling to be the energy, reduce by 88.5% in the time of can making energy consumption (obtaining the energy that the unit strain amount is consumed) many to rolling wheel rolling than independent use, strain efficient (obtaining the time that the unit strain amount is consumed) has improved 35.0% than manying to rolling wheel rolling technology, and the strain homogeneity on the square section has improved 198%, improved 84.9% man-hour than using the ECAP technology to add separately when manying to rolling wheel rolling than single crafty use.
(3) the present invention has very strong ability of regulation and control to the texture orientation of metallic substance, composes very near (Fig. 1) through facts have proved the XRD that the XRD that adopts the prepared metallic substance of the inventive method composes under (being X-ray diffraction spectrum) and its perfect condition.
(4) adopt the grain size of the prepared metallic substance of the present invention can reach 1～2 micron, subgrain size reaches about 50 nanometers, and its yield strength can improve more than 60% than original blank, and hardness can improve 40～90% than original blank.
Description of drawings
Fig. 1 is the fine aluminium standard x RD spectrogram originally in the embodiment of the invention.
Fig. 2 is the XRD spectra without the industrial aluminum of the inventive method processing.
Fig. 3 is the XRD spectra of the industrial aluminum after the inventive method is handled.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 3.
A kind of preparation method of the texture controllable fine grain metal material based on large strain deformation and recrystallization, comprise big strain predeformation and recrystallize thermal treatment, described big strain predeformation be make blank at first through too much to rolling wheel rolling attenuation, make simultaneously through too much dependent variable and be not less than 0.4 (volume under pressure is that the attenuation amount is not less than 50%) the blank of rolling wheel rolling; Secondly equal channel angular extrusion die is installed in the end a pair of rolling exit of taking turns, make through the rolling blank that rolls after thin of taking turns and under rolling wheel drive, directly enter and carry out big shear strain in the described extrusion mould and obtain big strain predeformation blank to realize the square section and be equal to big strain and the texture orientation of blank changed, described rolling the wheel to forming by upper and lower rolling the wheel, and upper and lower rolling the wheel with fast reverse rotation or friction speed reverse rotation, and the distance between upper and lower rolling the wheel is adjustable, rolling with the blank that satisfies different size; Described recrystallize thermal treatment is that the blank that obtains through aforementioned big strain predeformation method is sent in the heat treatment furnace, under 150～500 ℃, and insulation 0.5～2h, air cooling gets final product then.
Below be according to the example of method of the present invention based on the texture controllable fine grain metal material preparation of large strain deformation and recrystallization, but be not limited only to these examples, for the blank of heterogeneity,, all can reach purpose of the present invention as long as adopt the method for the invention.
Embodiment 1: blank adopts the annealed state commercial-purity aluminium, wherein rolling dependent variable 1.75 (volume under pressure 80%), and ECAP dependent variable 0.8 is heat-treated under 200 ℃, insulation 1h, air cooling.Prepared commercial-purity aluminium, its grain size reach 1～2 micron, and subgrain size is about 50 nanometers, and its yield strength improves more than 60% than original blank, and hardness improves 50% than original blank.
Embodiment 2: blank adopts the annealed state commercial-purity aluminium, wherein rolling dependent variable 0.4 (volume under pressure 50%), and ECAP dependent variable 0.8 is heat-treated under 500 ℃, insulation 1h, air cooling.Prepared commercial-purity aluminium has good texture orientation, and the standard x RD of its XRD spectrum (Fig. 3) and fine aluminium composes very near (Fig. 1), as can be seen from Figure 2, and without the XRD of commercial-purity aluminium and the having a long way to go of standard x RD spectrum (Fig. 1) of the present invention's processing.
Embodiment 3: blank adopts annealed state 5052 aluminium alloys, rolling dependent variable 0.4 (volume under pressure 50%), and ECAP dependent variable 0.8 is heat-treated under 500 ℃, insulation 1.5h, air cooling.5052 prepared aluminium alloys have good texture orientation, and its XRD spectrum is very approaching with the XRD spectrum of desirable commercial-purity aluminium.
Embodiment 4: blank adopts the annealed state commercial-purity aluminium, wherein rolling dependent variable 1.75 (volume under pressure 80%), and ECAP dependent variable 0.5 is heat-treated under 150 ℃, insulation 0.5h, air cooling.Prepared commercial-purity aluminium, its grain size reach 2～3 microns, and subgrain size is about 60 nanometers, and its yield strength improves more than 50% than original blank, and hardness improves 40% than original blank.
Embodiment 5: blank adopts the annealed state commercial-purity aluminium, wherein rolling dependent variable 1.75 (volume under pressure 80%), and ECAP dependent variable 0.5 is heat-treated under 300 ℃, insulation 2h, air cooling.Prepared commercial-purity aluminium, its grain size reach 2～3 microns, and subgrain size is about 55 nanometers, and its yield strength improves more than 55% than original blank, and hardness improves 45% than original blank.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (2)
1. preparation method based on the texture controllable fine grain metal material of large strain deformation and recrystallization, comprise big strain predeformation and recrystallize thermal treatment, it is characterized in that described big strain predeformation is to make blank at first through too much to rolling wheel rolling attenuation, make simultaneously through too much dependent variable and be not less than 40%, make the attenuation amount of blank be not less than 50% the blank of rolling wheel rolling; Secondly equal channel angular extrusion die is installed in the end a pair of rolling exit of taking turns, and makes from the rolling blank that rolls after thin of taking turns directly to enter under rolling wheel drive and carry out big shear strain the described extrusion mould and obtain big strain predeformation blank to realize the square section and be equal to big strain and the texture orientation of blank changed; Described recrystallize thermal treatment is that the blank that obtains through aforementioned big strain predeformation method is sent in the heat treatment furnace, under 150～500 ℃, and insulation 0.5～2h, air cooling gets final product then.
2. preparation method according to claim 1 is characterized in that described rolling take turns centering last rolling take turns and descend rolling take turns synchronous rotation or asynchronous rotation.
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| CN101994094B (en) * | 2010-09-30 | 2013-05-08 | 江苏大学 | Method for preparing rutile-type TiO2 thin film at room temperature |
| US20160122840A1 (en) * | 2014-11-05 | 2016-05-05 | General Electric Company | Methods for processing nanostructured ferritic alloys, and articles produced thereby |
| CN108240943A (en) * | 2016-12-24 | 2018-07-03 | 青海大学 | A kind of method with nano impress detection cold rolled metal thin plate normal strain uniformity |
| CN108034909B (en) * | 2017-12-14 | 2019-05-31 | 中南大学 | A kind of preparation method of 2050 aluminium lithium alloy fine grain plate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888108A (en) * | 2006-07-26 | 2007-01-03 | 哈尔滨工业大学 | Cariaceous high-damping deformation magnesium alloy and its prepn process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888108A (en) * | 2006-07-26 | 2007-01-03 | 哈尔滨工业大学 | Cariaceous high-damping deformation magnesium alloy and its prepn process |
Non-Patent Citations (1)
| Title |
|---|
| M.Eddahbi etal.Comparison of the microstructure and thermal stability of an AZ31 alloy processed by ECAP and large strain hot rolling.《Materials Science & Engineering》.2005,308-311. * |
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Denomination of invention: Preparation Method of Textured Controllable Fine Grain Metal Materials Based on Large Strain Deformation Recrystallization Effective date of registration: 20230526 Granted publication date: 20110330 Pledgee: Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Zhouzhuang sub branch Pledgor: JIANGYIN HENGYE FORGING Co.,Ltd. Registration number: Y2023980041962 |
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Granted publication date: 20110330 Pledgee: Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Zhouzhuang sub branch Pledgor: JIANGYIN HENGYE FORGING Co.,Ltd. Registration number: Y2023980041962 |
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Denomination of invention: Preparation method of texture controlled fine-grained metal materials based on large strain deformation recrystallization Granted publication date: 20110330 Pledgee: Bank of Communications Ltd. Wuxi branch Pledgor: JIANGYIN HENGYE FORGING Co.,Ltd. Registration number: Y2024980024855 |