CN108681629A - A kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire - Google Patents
A kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire Download PDFInfo
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 139
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- 229910000831 Steel Inorganic materials 0.000 claims description 10
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Abstract
The present invention relates to a kind of prediction of yield strength methods of cold drawing commercial-purity aluminium conducting wire, including obtain the radial crystallite dimension and texture volume fraction of the commercial-purity aluminium conducting wire of different distortion amount respectively；Obtain refined crystalline strengthening and texture strengthening；The step of obtaining the yield strength of commercial-purity aluminium conducting wire, advantages of the present invention：The relationship that the present invention passes through acquisition texture volume fraction and deflection, radial crystallite dimension and the relationship of deflection predict the yield strength of commercial-purity aluminium conducting wire, the intensity of final commercial-purity aluminium conducting wire can be directly predicted by crystallite dimension and deflection, so as to according to the intensity of the final aluminum conductor of the prediction of strength of initial aluminium bar, greatly avoid product quality unqualified, also simplify prediction technique, different initial aluminium bars are carried out rationally to utilize the product for producing specified mechanical property, technological design can be designed and produced to mechanical property in commercial-purity aluminium conducting wire industrial production and play important directive function.
Description
Technical field
The present invention relates to a kind of prediction of yield strength methods of cold drawing commercial-purity aluminium conducting wire.
Background technology
With the fast development of world economy, national electricity demand is also increasing year by year.However, usually power plant to use
The distance at electric end farther out, needs long distance delivery electric power.Aerial condutor is the important load that electric energy is conveyed from power generation end to receiving end
Body.In traditional structure structural metallic materials, aluminium is to be most suitable for being used as the conductor material of conducting wire, it have high specific strength, it is low at
Originally, good mechanical property and electric conductivity, thus obtain extensive use in overhead transmission line field.Wherein, commercial-purity aluminium exists
Application in overhead transmission line is especially extensive.For example, countries in the world use wide steel-cored aluminium strand (aluminum at present
Conductor steel reinforced, ACSR) and aluminum stranded wire of aluminum alloy core (aluminum conductor alloy
Reinforced, ACAR) outer layer be made of commercial-purity aluminium conducting wire.
Technical pure aluminum steel needs to bear certain load, such as wind load, dead weight during being on active service, and intensity is to evaluate its property
The good and bad important performance indexes of energy.Because the intensity of technical pure aluminum steel directly determines its military service security reliability.Technical pure aluminum steel
It is usually made by the drawing of multi-pass of technical pure aluminium bar, whether its final strength is related to product qualified, has an effect on aluminium
The other performance of line.Therefore, the prediction of strength of technical pure aluminum steel is an important problem in science.Aluminum current and aluminium alloy conductor
Heterogeneous microstructure develops in material cold drawing process and strengthening mechanism obtains extensive concern, but still has no at present
Research report in terms of commercial-purity aluminium conducting wire prediction of strength.There are many specifications for commercial-purity aluminium conducting wire, such as
3.5mm, 4.0mm etc. require the intensity of different size aluminum conductor in design, during actual processing, if can basis
The intensity of the final aluminum conductor of prediction of strength of initial aluminium bar, then can greatly avoid product quality unqualified, especially intensity
It is unqualified, different initial aluminium bars are carried out rationally to utilize the product for producing specified mechanical property.
Invention content
The technical problem to be solved in the present invention is to provide a kind of prediction of yield strength side of cold drawing commercial-purity aluminium conducting wire
Method, the commercial-purity aluminium conducting wire for solving existing varying strength index need to adjust the intensity of aluminium bar and the technology of cold-drawing process repeatedly
Problem.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：A kind of cold drawing technical pure
The prediction of yield strength method of aluminum conductor, includes the following steps successively：
Step 1：The radial crystallite dimension and texture volume fraction of the commercial-purity aluminium conducting wire of different distortion amount are obtained respectively；
Step 2：The relationship of radial crystallite dimension and deflection is obtained according to the radial crystallite dimension of step 1 acquisition,
And calculate the refined crystalline strengthening of commercial-purity aluminium conducting wire caused by radial crystallite dimension, according to step 1 obtain texture volume fraction come
The relationship of texture volume fraction and deflection is obtained, and the texture for calculating commercial-purity aluminium conducting wire caused by texture volume fraction is strong
Change；
Step 3：The refined crystalline strengthening and texture strengthening obtained according to step 2 is strong come the surrender for obtaining commercial-purity aluminium conducting wire
Degree.
Preferential, the deflection is indicated using conducting wire radial section shrinking percentage, and deflection passes through
It calculates,
Wherein：ε is deflection；AiFor the aluminum steel cross-sectional area after i passage drawings；A0For original aluminium bar cross-sectional area.
Preferential, the radial crystallite dimension in step 1 passes through
di=(1-0.01 εi)1/2·d0It calculates and obtains,
Wherein：diIt is ε for deflectioniWhen corresponding radial crystallite dimension, d0For the crystallite dimension of initial aluminium bar.
Preferential, the texture volume fraction in step 1 passes through
It calculates and obtains,
Wherein：f＜ iii ＞For<iii>The volume fraction of texture；S＜ iii ＞For<iii>The region area of orientation；S0For Statistical Area
The domain gross area.
Preferential, the initial aluminium bar is the technical pure aluminium bar that processing is rolled in continuous casting and rolling or casting-, and miscellaneous in initial aluminium bar
Matter content is 0.001~0.50wt.%.
Preferential, the radial crystallite dimension of initial aluminium bar is obtained by metallographic microscope or scanning electron microscope analysis.
Preferential, the refined crystalline strengthening in step 2 passes through
σHP=σ0+k·d-1/2It calculates and obtains,
Wherein：σHPFor refined crystalline strengthening, σ0It is coefficient for Pai Nali, k, d is radial crystallite dimension.
Preferential, the texture strengthening in step 2 passes through
σt=a1+b1·ε2It calculates and obtains,
Wherein：σtFor texture strengthening, a1、b1It is coefficient, ε is deflection.
Preferential, the yield strength of the commercial-purity aluminium conducting wire in step 3 is strong by refined crystalline strengthening in step 2 and texture
The adduction of change obtains.
In conclusion advantages of the present invention：Since in commercial-purity aluminium conductor material, grain shape, size and orientation are
The principal element of the movement and proliferation of dislocation is influenced, move distance of the dislocation relative to crystal boundary, thus meeting are reduced after crystal grain refinement
The resistance of deformation of metal is promoted, texture represents the crystal orientation of most crystal grain, and crystal orientation difference can also produce the movement of dislocation
Life significantly affects, to which the yield strength of commercial-purity aluminium conducting wire material is mainly made of refined crystalline strengthening and texture strengthening effect, and right
In commercial-purity aluminium conducting wire, shape, orientation and the size of crystal grain are influenced by deforming, and deflection is bigger, in radial directions
Crystal grain is more tiny, and when being axially stretched along wire rod, the inhibition of crystal boundary On Dislocation Motion is stronger, and resistance of deformation is bigger, this
Outside, deflection is bigger, and gauge or diameter of wire is thinner, is acted on by circumferential stress and axial tension, and crystal grain is more intended to rotation to shape
At<111>Texture,<111>Orientation is to be orientated firmly, has larger contribution to resistance of deformation, and therefore, the present invention is by obtaining texture body
The relationship of the relationship of fraction and deflection, radial crystallite dimension and deflection predicts the yield strength of commercial-purity aluminium conducting wire,
The intensity that final commercial-purity aluminium conducting wire can be directly predicted by crystallite dimension and deflection, so as to according to the intensity of initial aluminium bar
It predicts the intensity of final aluminum conductor, greatly avoids product quality unqualified, also simplify prediction technique, to different initial aluminium bars
Carry out rationally using producing the product of specified mechanical property, can to mechanical property design in commercial-purity aluminium conducting wire industrial production and
Process design plays important directive function.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is that the commercial-purity aluminium conducting wire that the present invention uses axially transmits structure observation and radial direction EBSD distribution of orientations figures；
Fig. 2 is the signal of the commercial-purity aluminium conducting wire texture volume fraction statistical result for the different distortion amount that the present invention uses
Figure；
Fig. 3 (a) is the present invention<111>The relation schematic diagram of texture volume fraction and deflection, Fig. 3 (b) are different distortion
The commercial-purity aluminium conducting wire texture strengthening of amount and the relation schematic diagram of deflection；
Fig. 4 is the signal of the refined crystalline strengthening Hall-Petch fitting a straight lines of the commercial-purity aluminium conducting wire of different distortion amount of the present invention
Figure；
Fig. 5 is the relation schematic diagram of commercial-purity aluminium the conducting wire radial direction crystallite dimension and deflection of different distortion amount of the present invention；
Fig. 6 is the contrast schematic diagram for the intensity results that the intensity that theoretical calculation of the present invention obtains is obtained with actual test.
Specific implementation mode
Fig. 1 is the different distortion amount commercial-purity aluminium conducting wire that the present invention establishes commercial-purity aluminium conducting wire prediction of yield strength method
Microstructure, as shown in Fig. 1 a, Fig. 1 b and Fig. 1 c, the results showed that, with the increase of drawing deformation amount, crystal grain is axially
It is obviously elongated, in addition, the number of dislocations of intra-die is less, this is because aluminium is high stacking fault energy material, in deformation process
Dislocation is easy to happen commutative Banach aglebra, is replied so as to cause dislocation；Different distortion amount industry aluminum conductor radial direction microstructure uses
EBSD is characterized, as shown in Fig. 1 d, Fig. 1 e and Fig. 1 f, the results showed that, radial crystal grain is equiax crystal, and with drawing deformation
Amount increases, and radial crystallite dimension is gradually reduced, in addition, can be seen that from distribution of orientations situation, commercial-purity aluminium conducting wire radial direction crystal grain is deposited
<001>With<111>Two kinds of orientations, in original aluminium bar,<001>The crystal grain of orientation is more, as deflection increases,<
001>Crystal grain quantity is orientated to reduce,<111>Crystal grain quantity is orientated to increase, therefore,<001>The crystal grain of orientation is increasingly turned to<111>
It is orientated, at deformation initial stage<001>Texture is Main Texture, deforms the later stage<111>Texture is Main Texture.
The present invention in conjunction with EBSD distribution of orientations figure and formula 1 by counting<111>Texture and<001>The volume of texture point
Number, statistical result as shown in Fig. 2, with deflection increase,<111>Texture volume fraction is increased to from initial 9.8%
76.0%, and it is corresponding<001>Texture volume fraction drops to 24.0% from 90.2%.
Formula 1：
Wherein, f＜ iii ＞For<iii>The volume fraction of texture；S＜ iii ＞For<iii>The region area of orientation；S0For Statistical Area
The domain gross area.
Therefore, the present invention includes following successively by a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire
Step：
Step 1：The radial crystallite dimension and texture volume fraction of the commercial-purity aluminium conducting wire of different distortion amount are obtained respectively；
Step 2：The relationship of radial crystallite dimension and deflection is obtained according to the radial crystallite dimension of step 1 acquisition,
And calculate the refined crystalline strengthening of commercial-purity aluminium conducting wire caused by radial crystallite dimension, according to step 1 obtain texture volume fraction come
The relationship of texture volume fraction and deflection is obtained, and the texture for calculating commercial-purity aluminium conducting wire caused by texture volume fraction is strong
Change；
Step 3：The refined crystalline strengthening and texture strengthening obtained according to step 2 is strong come the surrender for obtaining commercial-purity aluminium conducting wire
Degree.
The intensity that final commercial-purity aluminium conducting wire is directly predicted by crystallite dimension and deflection, so as to according to initial aluminium bar
The final aluminum conductor of prediction of strength intensity, greatly avoid product quality unqualified, also simplify prediction technique, at the beginning of difference
Beginning aluminium bar carries out rationally using the product for producing specified mechanical property, can be to mechanical property in commercial-purity aluminium conducting wire industrial production
It designs and produces technological design and plays important directive function.
In addition, the aluminium bar in the present embodiment includes：The Fe of the Si of the Al of 99.6wt.%, 0.11wt.%, 0.25wt.%,
Other chemical compositions of the Cu and 0.03wt.% of 0.01wt.%, aluminium bar is prepared by the processing of multiple passage cold-drawn wire to be had not
With the commercial-purity aluminium conducting wire material of deflection, deflection is indicated using conducting wire radial section shrinking percentage, and deflection is counted by formula 2
It calculates
Formula 2：
Wherein：ε is deflection；AiFor the aluminum steel cross-sectional area after i passage drawings；A0For original aluminium bar cross-sectional area.
The present embodiment quantitatively calculates the refined crystalline strengthening of different distortion amount commercial-purity aluminium conducting wire and texture strengthening is as follows：
For the commercial-purity aluminium conducting wire material prepared by different distortion amount, it is assumed that in its yield strength lifting process
Each strengthening mechanism is mutual indepedent, then the calculating of formula 3 may be used in the yield strength of the metal material with texture,
Formula 3：σYS=σ0+σg+σd+σss+σp+σt,
Wherein, σYSFor the yield strength of commercial-purity aluminium conducting wire, σ0For Pai Nali, σHPFor refined crystalline strengthening, σdFor dislocation strengthening,
σssFor solution strengthening, σpFor precipitation strength, σtFor texture strengthening.
The present embodiment using commercial-purity aluminium conducting wire, thus solution strengthening and it is precipitation hardened without the concern for.In addition,
Fig. 1 shows that commercial-purity aluminium conducting wire Dislocations level of density is relatively low, so dislocation strengthening can also ignore, therefore, by formula 3
It can be indicated with formula 4：
Formula 4：σYS=σHP+σt,
Distribution of orientations in Fig. 1 the result shows that, there are two kinds of texture inside drawing state commercial-purity aluminium conducting wire：<001>Texture and<
111>Texture, thus it can be assumed that the overall strength of commercial-purity aluminium conducting wire is by all<001>Be orientated crystal grain contribution intensity and
It is all<111>It is orientated the synthesis of crystal grain contribution intensity, then, the overall strength of commercial-purity aluminium conducting wire can be expressed as such as 5 institute of formula
Show：
Formula 5：σYS=f001 ＞ of ＜·σ001 ＞ of ＜+f111 ＞ of ＜·σ111 ＞ of ＜,
Wherein, f001 ＞ of ＜And f111 ＞ of ＜It is respectively<001>Texture and<111>The volume fraction of texture；σ001 ＞ of ＜And σ111 ＞ of ＜Point
It does not indicate<001>Be orientated and<111>It is orientated the intensity that crystal grain is contributed.
According to Schmidt law,<001>The saturation resolving shear stress of the crystal grain of orientation is τ001 ＞ of ＜,<111>The crystal grain of orientation
Saturation resolving shear stress is τ111 ＞ of ＜), and calculated by formula 6 and formula 7：
Formula 6：τ001 ＞ of ＜=σ001 ＞ of ＜·Ω001 ＞ of ＜,
Formula 7：τ111 ＞ of ＜=σ111 ＞ of ＜·Ω111 ＞ of ＜
Wherein：Ω001 ＞ of ＜For<001>Schmidt's factor of orientation, Ω111 ＞ of ＜For<111>Schmidt's factor of orientation, this reality
It applies in example, Ω001 ＞ of ＜It is 0.408, Ω111 ＞ of ＜It is 0.272.
The material used in being studied due to the present embodiment is polycrystalline commercial-purity aluminium conducting wire material, thus<001>Be orientated and<
111>The critical saturation resolving shear stress being orientated is equal with the critical saturation resolving shear stress value of aluminum steel, therefore：
Formula 8：
Furthermore it is possible to define a parameter, orientation factor is set as formula 9,
Formula 9：
Also, the critical saturation resolved shear stress (τ of commercial-purity aluminium conducting wireHP) acquisition can be calculated with formula 10,
Formula 10：
In formula, M0=3.06 are the orientation factor of the polycrystalline commercial-purity aluminium of no TEXTURE STATE, therefore obtain formula 11：
Formula 11：
According to formula 4 and formula 11, the intensity increment caused by texture can pass through 12 table of formula inside commercial-purity aluminium conducting wire
It is shown as：
Formula 12：
The reinforcing effect of commercial-purity aluminium conducting wire caused by texture strengthening and refined crystalline strengthening can be calculated.
In addition, originally applying example has counted the commercial-purity aluminium that deflection is respectively 0,24.6%, 65.6%, 83.1% and 90.2%
The radial crystallite dimension of conducting wire,<001>With<111>Texture volume fraction；And result calculates orientation factor according to the above discussion,
Texture strengthening and refined crystalline strengthening are as a result, the numerical value used in all calculating is listed in table one：
Table one
Then, the present embodiment is established prediction commercial-purity aluminium conducting wire yield strength method and is as follows：
According to formula 4 it is found that the yield strength of commercial-purity aluminium conducting wire mainly by refined crystalline strengthening and texture strengthening effect plus
And composition, texture volume fraction increase with deflection shown in changing rule such as Fig. 3 (a), with the volume of the increase texture of deflection
Linear relationship is presented in score, and shown in the relationship of texture strengthening and deflection such as Fig. 3 (b), second-degree parabola relationship is presented, because
This, texture strengthening and deformation magnitude relation are fitted by formula 13：
Formula 13：σt=a1+b1·ε2,
Shown in matched curve such as Fig. 3 (b), a is obtained1=-18.0MPa, b1=4.0 × 10-3MPa。
According to materialogy principle, refined crystalline strengthening meets Hall-Petch relationships, i.e., is fitted by formula 14：
Formula 14：σHP=σ0+k·d-1/2,
As shown in figure 4, fitting obtains σ0=34.57MPa k=91.26MPa μm1/2。
In commercial-purity aluminium conducting wire drawing process, the diametrical size of internal grain is directly related with deflection, because
Stress for drawing process wire rod is based on hoop pressure stress and axial tension stress.This is just to establish wire rod radially to put down
Equal crystallite dimension is laid a good foundation with deformation magnitude relation.For this purpose, according to the relationship of crystallite dimension and deflection, it is strong to establish fine grain
Change the relationship with deflection.Since while aluminum steel diameter reduces, radial crystallite dimension is also reducing.It has been illustrated above
It crosses, deflection is the ratio of radial area change.In the ideal case, i.e., when wire rod is constituted there are one crystal grain, this area is just
It is the cross sections product of single crystal grain, it is proportional to the diameter square of crystal grain.In polycrystalline, radial crystallite dimension and aluminium
Thus the proportional relationship of linear diameter derives that the relationship such as formula 15 of radial crystallite dimension and deflection indicates：
Formula 15：di=(1-0.01 εi)1/2·d0,
Wherein, diIt is ε for deflectioniWhen corresponding radial crystallite dimension, d0For aluminium bar crystallite dimension.
As shown in figure 5, the radial crystallite dimension being calculated by formula 15 is accorded with the radial crystallite dimension that test obtains
It closes preferably, illustrates the relationship that above-mentioned establishing equation radial direction crystallite dimension and deflection may be used, therefore formula 15 is substituted into public affairs
Formula 14 obtains formula 16：
Formula 16：σHP=σ0+k·d-1/2=σ0+k·[(1-0.01·εi)1/2·d0]-1/2,
Then formula 16 and formula 13 are substituted into formula 4 and obtains formula 17：
Formula 17：σUTS=σt+σHP
=a1+b1·ε2+σ0+k·[(1-0.01·ε)1/2·d0]-1/2,
Finally, formula 13, formula 14 are fitted obtained numerical value and bring formula 17 into, thus can directly set up industry
The functional relation of fine aluminium conductor material yield strength and deflection, functional relation are indicated by formula 18：
Formula 18：σYS=16.57+0.004 ε2+91.26163·[(1-0.01·ε)1/2·d0]-1/2,
In the case of can be used for known initial commercial fine aluminium pole stock average grain size by formula 18, different distortion is predicted
Measure the yield strength of commercial-purity aluminium conducting wire.
In addition, in order to verify the accuracy and correctness of the above method, the present embodiment has chosen two kinds with identical initial
Aluminium bar crystallite dimension (1.6 μm) but the commercial-purity aluminium conducting wire processed by different drawing deformation paths, as a result as shown in Fig. 6 (a),
Pass through the intensity knot for the relation curve and actual test acquisition for obtaining commercial-purity aluminium conducting wire intensity and deflection that formula 18 calculates
Fruit meets preferably.As long as this also illustrates that initial aluminium bar crystallite dimension is consistent, after the processing of identical deflection, intensity is basic
Unanimously.Final commercial-purity aluminium conducting wire intensity is related with initial aluminium bar crystallite dimension and total deflection, with deformation processing path without
It closes.
In addition, having chosen a kind of commercial-purity aluminium conducting wire progress model verification of initial aluminium bar crystallite dimension bigger, pass through table
It is 2.0 μm that sign, which obtains aluminium bar radial direction crystallite dimension, therefore, by the d in 2.0 μm of replacements to formula 180Formula 19 is obtained,
Formula 19：σYS=16.57+0.004 ε2+91.26163·[(1-0.01·ε)1/2·2]-1/2,
As shown in Fig. 6 (b), data fit that the data that are obtained through formula (19) the Fitting Calculation are obtained with actual test compared with
It is good, therefore, it can be deduced that can predict final different size (different distortion amount) work using the radial crystallite dimension of initial aluminium bar
The intensity of industry fine aluminium conducting wire.
In addition to above preferred embodiment, the present invention also has other embodiments, those skilled in the art can be according to this
Various changes and variants are made in invention, without departing from the spirit of the present invention, should all belong to appended claims of the present invention and determine
The range of justice.
Claims (9)
1. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire, it is characterised in that：Include the following steps successively：
Step 1：The radial crystallite dimension and texture volume fraction of the commercial-purity aluminium conducting wire of different distortion amount are obtained respectively；
Step 2：The relationship of radial crystallite dimension and deflection is obtained according to the radial crystallite dimension of step 1 acquisition, and is counted
The refined crystalline strengthening for calculating commercial-purity aluminium conducting wire caused by radial crystallite dimension is obtained according to the texture volume fraction of step 1 acquisition
The relationship of texture volume fraction and deflection, and calculate the texture strengthening of commercial-purity aluminium conducting wire caused by texture volume fraction；
Step 3：The yield strength of commercial-purity aluminium conducting wire is obtained according to the refined crystalline strengthening of step 2 acquisition and texture strengthening.
2. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 1, it is characterised in that：
The deflection is indicated using conducting wire radial section shrinking percentage, and deflection passes through
It calculates,
Wherein：ε is deflection；AiFor the aluminum steel cross-sectional area after i passage drawings；A0For original aluminium bar cross-sectional area.
3. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 1, it is characterised in that：
Radial crystallite dimension in step 1 passes through
di=(1-0.01 εi)1/2·d0It calculates and obtains,
Wherein：diIt is ε for deflectioniWhen corresponding radial crystallite dimension, d0For the crystallite dimension of initial aluminium bar.
4. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 1, it is characterised in that：
Texture volume fraction in step 1 passes through
It calculates and obtains,
Wherein：f＜ iii ＞For<iii>The volume fraction of texture；S＜ iii ＞For<iii>The region area of orientation；S0It is total for statistical regions
Area.
5. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 3, it is characterised in that：
The initial aluminium bar is the technical pure aluminium bar that processing is rolled in continuous casting and rolling or casting-, and the impurity content in initial aluminium bar be 0.001~
0.50wt.%.
6. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 5, it is characterised in that：
The radial crystallite dimension of initial aluminium bar is obtained by metallographic microscope or scanning electron microscope analysis.
7. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 1, it is characterised in that：
Refined crystalline strengthening in step 2 passes through
σHP=σ0+k·d-1/2It calculates and obtains,
Wherein：σHPFor refined crystalline strengthening, σ0It is coefficient for Pai Nali, k, d is radial crystallite dimension.
8. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 7, it is characterised in that：
Texture strengthening in step 2 passes through
σt=a1+b1·ε2It calculates and obtains,
Wherein：σtFor texture strengthening, a1、b1It is coefficient, ε is deflection.
9. a kind of prediction of yield strength method of cold drawing commercial-purity aluminium conducting wire according to claim 8, it is characterised in that：
The yield strength of commercial-purity aluminium conducting wire in step 3 is obtained by the adduction of refined crystalline strengthening and texture strengthening in step 2.
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Cited By (2)
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| CN111914438A (en) * | 2020-08-27 | 2020-11-10 | 浙江华电器材检测研究所有限公司 | Prediction formula and prediction method for yield strength of aged pure aluminum wire or aluminum alloy wire |
| CN112733330A (en) * | 2020-12-22 | 2021-04-30 | 武汉理工大学 | Method for predicting thermal deformation behavior and yield strength after forming of aluminum alloy |
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| CN101046682A (en) * | 2007-04-28 | 2007-10-03 | 武汉科技大学 | Method for predicting hot-rolling Nb-containing band steel organization and mechanical properties |
| CN102234716A (en) * | 2011-08-03 | 2011-11-09 | 天津大学 | Method for predicting dynamic recrystallization microstructure evolution in thermal deformation process of pure copper |
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| CN101046682A (en) * | 2007-04-28 | 2007-10-03 | 武汉科技大学 | Method for predicting hot-rolling Nb-containing band steel organization and mechanical properties |
| CN102234716A (en) * | 2011-08-03 | 2011-11-09 | 天津大学 | Method for predicting dynamic recrystallization microstructure evolution in thermal deformation process of pure copper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111914438A (en) * | 2020-08-27 | 2020-11-10 | 浙江华电器材检测研究所有限公司 | Prediction formula and prediction method for yield strength of aged pure aluminum wire or aluminum alloy wire |
| CN112733330A (en) * | 2020-12-22 | 2021-04-30 | 武汉理工大学 | Method for predicting thermal deformation behavior and yield strength after forming of aluminum alloy |
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| CN108681629B (en) | 2023-12-15 |
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