CN103602934A - Frequency spectrum harmonic wave processing method for improving dimensional stability of aluminum matrix composite material - Google Patents
Frequency spectrum harmonic wave processing method for improving dimensional stability of aluminum matrix composite material Download PDFInfo
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- CN103602934A CN103602934A CN201310565105.7A CN201310565105A CN103602934A CN 103602934 A CN103602934 A CN 103602934A CN 201310565105 A CN201310565105 A CN 201310565105A CN 103602934 A CN103602934 A CN 103602934A
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- 239000011159 matrix material Substances 0.000 title claims abstract description 48
- 238000001228 spectrum Methods 0.000 title claims abstract description 36
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000003672 processing method Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 42
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 230000032683 aging Effects 0.000 claims description 35
- 230000002787 reinforcement Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000035882 stress Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000009191 jumping Effects 0.000 abstract 1
- 239000011156 metal matrix composite Substances 0.000 abstract 1
- 238000010183 spectrum analysis Methods 0.000 abstract 1
- 238000003878 thermal aging Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 23
- 230000001351 cycling effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 8
- 229910010271 silicon carbide Inorganic materials 0.000 description 8
- 230000004087 circulation Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
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Abstract
The invention belongs to the field of metal matrix composite materials, and relates to a frequency spectrum harmonic wave processing method for improving the dimensional stability of an aluminum matrix composite material. The method is characterized by comprising the following operation steps: the method comprises the steps of performing frequency spectrum analysis on the aluminum matrix composite by using a Fourier analysis method, preferably selecting five harmonic frequencies with the best effect and two alternative harmonic frequencies, applying proper energy to perform treatment for proper time according to the five harmonic frequencies in sequence, automatically jumping to treat the next frequency if a resonance frequency exists, and superposing multi-directional dynamic stress generated by vibration and residual stress in multi-dimensional distribution to cause plastic deformation, thereby achieving the purposes of reducing peak residual stress and homogenizing residual stress and improving size stability. The method greatly overcomes the defects of low efficiency, long construction period, large energy consumption and high cost of the traditional thermal aging treatment, and has the advantages of small occupied area, portable and portable equipment and no limitation of the size of the workpiece.
Description
Technical field
The invention belongs to metal-base composites field, relate to a kind of frequency spectrum harmonic management method that improves aluminum matrix composite dimensional stability.
Technical background
The aluminum matrix composite the present invention relates to is high body part silicon-carbide particle/aluminium base (being abbreviated as SiCp/Al) matrix material, it has good mechanics and the physicalies such as higher specific rigidity, specific tenacity, Young's modulus, wear resistance, low thermal coefficient of expansion and high heat conductance, and low cost of manufacture, its performance is compared with traditional aluminium alloy, titanium alloy and carbon steel to be had clear superiority (specific modulus can reach three times of aluminium alloy, 40% of the not enough aluminium alloy of thermal expansivity, density is 38% of carbon steel, and thermal conductivity is nearly 40 times of titanium alloy).This material has broad application prospects in fields such as aerospace, military affairs, automobile, electronics, sports, and on the aerospace precision instrument of Yi China and military electronic devices and components, obtains short run application, and obtains significant Application effect.
Because high body part SiCp/Al matrix material is usually applied in precision instrumentation, precision instrumentation requires very harsh to the unrelieved stress of material and dimensional stability.The main dimensional stabilizing method of current high body part SiCp/Al matrix material is thermal life method, different thermal life temperature, time all the dimensional stability of material impact, treatment process also can reduce the dimensional stability of material improperly, and common thermal life treatment process also exists energy consumption high, discharge high, cost is high, efficiency is low, the drawback such as long in time limit, therefore find a kind of environmental friendliness, cost is low, efficiency is high, the novel method that technique is easy to control is that high body part SiCp/Al matrix material is applied and even the key point of large-scale application in precision instrumentation.
Summary of the invention
The object of the invention is: the novel method that environmental friendliness, cost are low, efficiency is high that provides a kind of high body part SiCp/Al matrix material size stabilization to process.
The present invention takes following technical scheme:
A kind of frequency spectrum harmonic wave aging treatment method that improves aluminum matrix composite dimensional stability, it is characterized in that: first step: select suitable vibrator, vibrator is fastened on and with fixture, is fixed on the platform that vibrator is housed on workpiece or by sample with cramp frame; Second step: aluminum matrix composite is carried out to Fourier analysis, find 5 harmonic frequencies and 2 alternative harmonic frequencies and sort in rotating speed 6000rpm; Third step: select suitable time of vibration; The 4th step is carried out oscillating aging processing according to the harmonic frequency of choosing and time of vibration above successively to aluminum matrix composite.
In described first step, choose the vibrator that exciting force is 35 ~ 80KN.
In described second step, the rotating speed of vibrator is at 3000 ~ 6000rpm, and precision frequency stabilization is: 1rpm.
In described third step, the time of vibration treatment is chosen 2 ~ 30 minutes, and vibration number is chosen 1 ~ 3 time, and after the vibration of having carried out each frequency, automatic search enters next frequency and vibrates.
The aluminum matrix composite using is high body part SiCp/Al matrix material, and the content of reinforcement SiC is 45% ~ 70%, SiC even particle distribution.
Advantage of the present invention is: this treatment process is compared with traditional treatment method, have that production efficiency is high, cost is low, environmentally friendly, energy consumption is little, floor space is little, the light portable of equipment, be not subject to the restriction of workpiece volume size, the advantages such as unrelieved stress declines obviously, and dimensional stabilizing property improvement is remarkably productive.
Accompanying drawing explanation
Fig. 1 is without high body part (55%) SiCp/Al composite temperature and the strain temporal evolution curve of crossing frequency spectrum harmonic wave ageing treatment;
Fig. 2 is high body part (55%) SiCp/Al composite temperature and strain temporal evolution curve through frequency spectrum harmonic wave ageing treatment;
Fig. 3 is not for passing through and process frequency spectrum harmonic wave high body part of ageing treatment (55%) SiCp/Al composite temperature and strain temporal evolution dotted line comparison diagram;
Fig. 4 is high body part (45%) SiCp/Al composite material parts front elevation;
Fig. 5 is high body part (45%) SiCp/Al composite material parts reverse side figure;
Fig. 6 is that high body part (45%) SiCp/Al composite material parts unrelieved stress before and after frequency spectrum harmonic wave ageing treatment changes dotted line comparison diagram;
Fig. 7 is the U-shaped sample plane figure of high body part SiCp/Al matrix material;
Fig. 8 is not process and process frequency spectrum harmonic wave ageing treatment cold cycling detection front and back planeness cylindricality comparison diagram of high body part (65%) SiCp/Al matrix material;
Fig. 9 is not process and process frequency spectrum harmonic wave ageing treatment cold cycling detection front and back parallelism cylindricality comparison diagram of high body part (65%) SiCp/Al matrix material;
Figure 10 is not process and process frequency spectrum harmonic wave ageing treatment cold cycling detection front and back verticality cylindricality comparison diagram of high body part (65%) SiCp/Al matrix material;
Figure 11 is not process and process frequency spectrum harmonic wave ageing treatment cold cycling detection front and back planeness cylindricality comparison diagram of high body part (70%) SiCp/Al matrix material;
Figure 12 is not process and process frequency spectrum harmonic wave ageing treatment cold cycling detection front and back parallelism cylindricality comparison diagram of high body part (70%) SiCp/Al matrix material;
Figure 13 is not process and process frequency spectrum harmonic wave ageing treatment cold cycling detection front and back verticality cylindricality comparison diagram of high body part (70%) SiCp/Al matrix material;
Figure 14 be high body part (65%) SiCp/Al matrix material not through and through once, twice, three times frequency spectrum harmonic wave ageing treatment cold cycling detect before and after planeness cylindricality comparison diagrams;
Figure 15 be high body part (65%) SiCp/Al matrix material not through and through once, twice, three times frequency spectrum harmonic wave ageing treatment cold cycling detect before and after parallelism cylindricality comparison diagrams;
Figure 16 be high body part (65%) SiCp/Al matrix material not through and through once, twice, three times frequency spectrum harmonic wave ageing treatment cold cycling detect before and after verticality cylindricality comparison diagrams.
Embodiment
The present embodiment chosen material is high body part SiCp/Al(55%) matrix material, reinforcement SiC uniform particles is distributed in Al matrix, and sample is bar, and diameter is 5mm, and length is 25mm.
Specific implementation method: first, batch to be tested is carried out to frequency spectrum harmonic wave ageing treatment, concrete treatment step: first step, choose the vibrator that exciting force is 65KN, sample is fixed on the shaking platform that this vibrator is housed.Second step, finds out five optimum excited frequencies and two alternative excited frequencies by Fourier analysis, vibrates rotating speed respectively: 4048rpm, 4278rpm, 4408rpm, 4575rpm, 4720rpm, 4905rpm, 5134rpm.Third step, time of vibration is 18min, 16min, 16min, 14min, 14min, 14min, 12min successively, carries out vibration treatment.For another Lot sample contrasting, do not process; Secondly, processing and untreated sample are carried out to dimensional stability detection, detection is in thermal dilatometer DIL402C(Δ L resolving power: 0.125nm) on instrument, carry out, sample on this instrument online through 7 hot and cold circulations, circulating temperature scope is-10 ~ 50 ℃, heating-cooling speed is 4 ℃/min, and concrete data refer to Fig. 1, Fig. 2, Fig. 3; Finally, the data in comparison diagram 1, Fig. 2, Fig. 3.Sample is online more than process detects after strain amount, dimensional stability that size fluctuation amplitude is less is higher, and result shows: the specimen size stability through frequency spectrum harmonic wave ageing treatment improves significantly.
The present embodiment chosen material is high body part SiCp/Al(45%) matrix material, reinforcement SiC is evenly distributed in Al matrix, and experiment part is shown in Fig. 4, Fig. 5.
Specific implementation method: first, be uniformly distributed and choose 7 points on 4, parts drawing, and measure their unrelieved stress; Secondly, part is carried out to harmonic wave ageing treatment, concrete treatment step: first step, choose the vibrator that exciting force is 35KN, sample is fixed on the shaking platform that this vibrator is housed.Second step, finds out five optimum excited frequencies and two alternative excited frequencies by Fourier analysis, vibrates rotating speed respectively: 3000rpm, 3298rpm, 3487rpm, 3613rpm, 3852rpm, 3996rpm, 4207rpm.Third step, time of vibration is 22min, 20min, 20min, 18min, 18min, 16min, 16min successively, carries out vibration treatment; The unrelieved stress of 7 points again, choosing on same position measurement.Specific experiment data are in Table 1; Finally, according to data in table 1, make Fig. 6, by Fig. 6, we can find out, after frequency spectrum harmonic wave ageing treatment, have reached the object that reduces part peak value unrelieved stress and homogenizing unrelieved stress.Because frequency spectrum harmonic wave ageing treatment does not change the tissue of material, so the reduction of unrelieved stress and homogenizing can be improved the dimensional stability of material.
Table 1: unrelieved stress numerical value contrast before and after part frequency spectrum harmonic wave ageing treatment
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Before processing | 62.93 | 0.56 | -34.73 | 9.59 | 25.33 | 16.34 | 60.71 |
| After processing | 14.21 | 16.24 | 17.96 | -19.78 | -15.78 | 17.2 | 27.08 |
The present embodiment chosen material is high body part SiCp/Al(65%) matrix material, reinforcement SiC is evenly distributed in Al matrix, and U-shaped experimental sample is shown in Fig. 7.
Specific implementation method: first, measure the planeness of U-shaped sample, parallelism, verticality record; Secondly, a collection of U-shaped sample is carried out to frequency spectrum ageing treatment, treatment step is as follows: concrete treatment step: first step, choose the vibrator that exciting force is 50KN, and sample is fixed on the shaking platform that this vibrator is housed.Second step, finds out five optimum excited frequencies and two alternative excited frequencies by Fourier analysis, vibrates rotating speed respectively: 4496rpm, 4617rpm, 4735rpm, 4891rpm, 5113rpm, 5261rpm, 5428rpm.Third step, time of vibration is 30min, 30min, 28min, 26min, 26min, 24min, 24min successively, carries out vibration treatment; Again, by process with without the U-shaped sample of crossing frequency spectrum harmonic wave ageing treatment, carry out cold cycling detection, cycle index is 7 times, and the temperature range of circulation is-10 ~ 50 ℃, and heating-cooling speed is 4 ℃/min; Finally, after cold cycling detects, measure the planeness of U-shaped sample, parallelism, verticality.To process with without the U-shaped sample plane degree of crossing frequency spectrum harmonic wave ageing treatment, parallelism, the variable quantity of verticality contrasts, and as Fig. 8,9,10 results show through high body part SiCp/Al matrix material variable quantity of frequency spectrum harmonic wave ageing treatment littlely, dimensional stability is better.
The present embodiment chosen material is high body part SiCp/Al(70%) matrix material, reinforcement SiC is evenly distributed in Al matrix, and U-shaped experimental sample is shown in Fig. 7.
Specific implementation method: first, measure the planeness of U-shaped sample, parallelism, verticality record; Secondly, a collection of U-shaped sample is carried out to frequency spectrum ageing treatment, treatment step is as follows: concrete treatment step: first step, choose the vibrator that exciting force is 80KN, and sample is fixed on the shaking platform that this vibrator is housed.Second step, finds out five optimum excited frequencies and two alternative excited frequencies by Fourier analysis, vibrates rotating speed respectively: 4936rpm, 5167rpm, 5321rpm, 5519rpm, 5705rpm, 5861rpm, 6000rpm.Third step, time of vibration is that 12min, 10min, 8min, 6min, 4min, 4min, 2min carry out vibration treatment successively; Again, by process with without the U-shaped sample of crossing frequency spectrum harmonic wave ageing treatment, carry out cold cycling detection, cycle index is 7 times, and the temperature range of circulation is-10 ~ 50 ℃, and heating-cooling speed is 4 ℃/min; Finally, after cold cycling detects, measure the planeness of U-shaped sample, parallelism, verticality.To process with without the U-shaped sample plane degree of crossing frequency spectrum harmonic wave ageing treatment, parallelism, the variable quantity of verticality contrasts, and as Figure 11,12,13 results show through high body part SiCp/Al matrix material variable quantity of frequency spectrum harmonic wave ageing treatment littlely, dimensional stability is better.
The present embodiment chosen material is high body part SiCp/Al(65%) matrix material, reinforcement SiC is evenly distributed in Al matrix, and U-shaped experimental sample is shown in Fig. 7.
First, measure the planeness of two batches of U-shaped samples, parallelism, verticality record; Secondly, to these two batches U-shaped samples, use the frequency spectrum harmonic wave ageing treatment condition in embodiment 3 to carry out respectively twice and three processing; Again, the U-shaped sample through twice, three times frequency spectrum harmonic wave ageing treatment is carried out to cold cycling detection, cycle index is 7 times, the temperature range of circulation is-10 ~ 50 ℃, and heating-cooling speed is 4 ℃/min, and the planeness of two batches of U-shaped samples of survey record, parallelism, verticality; Finally, this testing data is compared with together with experimental data in embodiment 3, as Figure 14,15,16.Result show through frequency spectrum harmonic wave ageing treatment once, twice, three times ratios are less without high body part SiCp/Al matrix material variable quantity of crossing frequency spectrum harmonic wave ageing treatment, dimensional stability is better.
Claims (5)
1. a frequency spectrum harmonic wave aging treatment method that improves aluminum matrix composite dimensional stability, it is characterized in that: first step: select suitable vibrator, vibrator is fastened on and with fixture, is fixed on the platform that vibrator is housed on workpiece or by sample with cramp frame; Second step: aluminum matrix composite is carried out to Fourier analysis, also sort with 5 harmonic frequencies of interior searching and 2 alternative harmonic frequencies at rotating speed 6000rpm; Third step: select suitable time of vibration; The 4th step is carried out oscillating aging processing according to the harmonic frequency of choosing and time of vibration above successively to aluminum matrix composite.
2. aluminum matrix composite dimensional stabilizing method according to claim 1, is characterized in that: in first step, choose the vibrator that exciting force is 35 ~ 80KN.
3. aluminum matrix composite dimensional stabilizing method according to claim 1, is characterized in that: in second step, the rotating speed of vibrator is controlled within the scope of 3000 ~ 6000rpm, precision frequency stabilization is: 1rpm.
4. aluminum matrix composite dimensional stabilizing method according to claim 1, it is characterized in that: in third step, the time of vibration treatment is chosen 2 ~ 30 minutes, vibration number is chosen 1 ~ 3 time, and after the vibration of having carried out each frequency, automatic search enters next frequency and vibrates.
5. aluminum matrix composite dimensional stabilizing method according to claim 1, is characterized in that: the aluminum matrix composite using is high body part SiCp/Al matrix material, and the content of reinforcement SiC is 45% ~ 70%, SiC even particle distribution.
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Cited By (2)
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| CN109016563A (en) * | 2018-07-25 | 2018-12-18 | 西南交通大学 | A kind of device and method for eliminating residual stress of composites control curing deformation |
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