CN104313384B - Preparation method of in-situ Al3Ti intermetallic compound particle reinforced aluminum-based composite material - Google Patents
Preparation method of in-situ Al3Ti intermetallic compound particle reinforced aluminum-based composite material Download PDFInfo
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Abstract
The invention relates to a preparation method of an in-situ generated Al3Ti intermetallic compound particle reinforced aluminum-based composite material. The preparation method is characterized by comprising the following steps: firstly, roasting potassium fluotitanate powder for 2-3 hours at 250-300 DEG C; putting an aluminum-silicon alloy into a graphite crucible to be heated to 760-800 DEG C and insulting for 10-15 minutes; immersing a preheated ultrasonic amplitude transformer into a melt, and adding the powder which accounts for 2-10wt.% of the aluminum-silicon alloy into the aluminum-silicon alloy melt every 10-15 seconds while carrying out ultrasonic treatment for 3-5 minutes; and cooling the melt to 710-720 DEG C and continuously carrying out ultrasonic treatment on the melt for 1-2 minutes at a power of 700-800W. The organization structure of the obtained aluminum-based composite material is remarkably improved, wherein the crystalline grains become small, the silicon phase becomes small fibriform from original strip, short rod and grain and the generated Al3Ti reinforcing phase is small-block-like and granular and is relatively diffused in distribution.
Description
Technical field
The present invention relates to one kind situ Al is prepared under ultrasonic wave added3The method of Ti particle enhanced aluminum-based composite materials.
Background technology
In-situ synthesized is the main method for preparing particles reiforced metal-base composition at present, and it is in certain condition
Under, by the chemical reaction between element or between element and compound, one or more height of in-situ preparation are hard in Metal Substrate
Degree, the ceramics of high elastic modulus or intermetallic compound strengthen the purpose of parent metal so as to reach as enhancing phase.Close original position
Aluminum-base composite is turned into because strengthening the advantages of phase size is small, heat endurance is good and matrix wetability is good, interface cohesion is firm into method
An important development direction in material.Al3Ti is a kind of ideal In-sltu reinforcement particle, with density it is low, fusing point is high,
The advantages of elastic modelling quantity is high, high-temperature oxidation resistance is good, the difference of thermal coefficient of expansion and matrix alloy is small.But if with traditional
When mechanical agitation methods prepare composite, tissue and performance are not ideal enough, and in metal-base composites preparation process
Applying high-energy ultrasonic can significantly improve the wetability of enhancing particle and matrix, and thinning microstructure improves the performance of material, and to matrix
Tissue also has degasification, slagging-off effect, and equipment is simple, and pollution is few.Therefore, by high-energy ultrasonic treatment and traditional cast form work
Skill is combined to be paid close attention to by many researchers.
The content of the invention
It is an object of the invention to provide a kind of fabricated in situ Al3The method of Ti particle enhanced aluminum-based composite materials.
Preparation technology of the present invention is：Potassium fluotitanate powder is toasted into 2~3h at 250~300 DEG C first；By aluminium
Silicon alloy is put into graphite crucible and is heated to 760~800 DEG C, is incubated 10~15min;Preheated ultrasonic amplitude transformer is immersed
To in melt, 600~700W is respectively in ultrasonic power and frequency, under conditions of 20kHz, 3~5min of ultrasound, ultrasonic is same
When with the addition speed of 0.4~1.4g/s by the potassium fluotitanate powder after baking by the wt.% of mass number 2~10 for accounting for alusil alloy
It is added in Al-Si alloy melt；Melt is cooled to 710~720 DEG C, with the power of 700~800W, is continued to ultrasonic melt 1
~2min, is poured into metal pattern, sampling to be cooled after refining slagging-off.
The aluminum matrix composite institutional framework that the present invention is obtained is significantly improved：Crystal grain diminishes, and silicon is by original length
Strip, corynebacterium and graininess become tiny threadiness, the Al of generation3Ti enhancings mutually in tiny block, graininess, distribution compared with
Disperse.This largely improves the mechanical property of casting.This process costs is low, easy to operate, safe and reliable.
Brief description of the drawings
Fig. 1 is the situ Al of preparation under the conditions of embodiment of the present invention 23The optics of Ti particle enhanced aluminum-based composite materials shows
Micro-assembly robot pattern.
Specific embodiment
The present invention will be described further by following embodiment.
Fabricated in situ described in this embodiment prepares aluminum matrix composite, is anti-by additional ultrasonic wave added and original position
Preparation should be combined, the ultrasound of different parameters is applied with different temperatures and time period to melt.
Embodiment 1.
Potassium fluotitanate powder is toasted into 3h at 250 DEG C first；Alusil alloy is put into 760 are heated in graphite crucible
DEG C, it is incubated 10min;Preheated ultrasonic amplitude transformer is immersed in melt, 600W is respectively in ultrasonic power and frequency,
Under conditions of 20kHz, ultrasonic 3min is pressed the potassium fluotitanate powder after baking with the addition speed of 1.4g/s while ultrasonic
The mass number 4wt.% for accounting for alusil alloy is added in Al-Si alloy melt；Melt is cooled to 710 DEG C, with the power of 750W,
Continue, to ultrasonic melt 1min, to be poured into metal pattern after refining slagging-off, sampling to be cooled.
Embodiment 2.
Potassium fluotitanate powder is toasted into 2h at 300 DEG C first；Alusil alloy is put into 780 are heated in graphite crucible
DEG C, it is incubated 15min;Preheated ultrasonic amplitude transformer is immersed in melt, 700W is respectively in ultrasonic power and frequency,
Under conditions of 20kHz, ultrasonic 4min is pressed the potassium fluotitanate powder after baking with the addition speed of 0.4g/s while ultrasonic
The wt.% of mass number 10 for accounting for alusil alloy is added in Al-Si alloy melt；Melt is cooled to 720 DEG C, with the work(of 800W
Rate, continues, to ultrasonic melt 2min, to be poured into metal pattern after refining slagging-off, sampling to be cooled.
Embodiment 3.
Potassium fluotitanate powder is toasted into 2h at 250 DEG C first；Alusil alloy is put into 780 are heated in graphite crucible
DEG C, it is incubated 10min;Preheated ultrasonic amplitude transformer is immersed in melt, 600W is respectively in ultrasonic power and frequency,
Under conditions of 20kHz, ultrasonic 3min is pressed the potassium fluotitanate powder after baking with the addition speed of 0.4g/s while ultrasonic
The mass number 2wt.% for accounting for alusil alloy is added in Al-Si alloy melt；Melt is cooled to 710 DEG C, with the power of 700W,
Continue, to ultrasonic melt 1min, to be poured into metal pattern after refining slagging-off, sampling to be cooled.
Embodiment 4.
Potassium fluotitanate powder is toasted into 3h at 300 DEG C first；Alusil alloy is put into 800 are heated in graphite crucible
DEG C, it is incubated 15min;Preheated ultrasonic amplitude transformer is immersed in melt, 650W is respectively in ultrasonic power and frequency,
Under conditions of 20kHz, ultrasonic 5min is pressed the potassium fluotitanate powder after baking with the addition speed of 1.4g/s while ultrasonic
The mass number 6wt.% for accounting for alusil alloy is added in Al-Si alloy melt；Melt is cooled to 720 DEG C, with the power of 750W,
Continue, to ultrasonic melt 2min, to be poured into metal pattern after refining slagging-off, sampling to be cooled.
Accompanying drawing 1 is the situ Al of preparation under the conditions of embodiment of the present invention 23The optics of Ti particle enhanced aluminum-based composite materials
Displaing micro tissue topography, visible in figure, the aluminum matrix composite microscopic structure for being obtained is significantly improved, crystal grain refinement,
Become compared with rounding, silicon becomes tiny threadiness, and the Al for generating by original strip, corynebacterium and graininess3Ti
Enhancing is in mutually tiny bulk, graininess, is distributed compared with disperse, and this greatly increases the mechanical property of casting.
Claims (1)
1. a kind of in-situ preparation Al3The preparation method of Ti intermetallic compound particle reinforced aluminum matrix composites, it is characterized in that first
Potassium fluotitanate powder is toasted into 2~3h at 250~300 DEG C；Alusil alloy is put into 760~800 are heated in graphite crucible
DEG C, it is incubated 10~15min;Preheated ultrasonic amplitude transformer is immersed in melt, in 600~700W of ultrasonic power and frequency
3~5min of ultrasound under conditions of 20kHz, with the addition speed of 0.4~1.4g/s by the potassium fluotitanate after baking while ultrasonic
Powder is added in Al-Si alloy melt by the 2~6wt.% of mass number for accounting for alusil alloy；Melt is cooled to 710~720 DEG C,
With the power of 700~800W, continue, to 1~2min of ultrasonic melt, to be poured into metal pattern after refining slagging-off.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104789810B (en) * | 2015-03-04 | 2017-04-05 | 南昌大学 | A kind of situ Al3The preparation method of Ti particle REINFORCED Al Si Cu composite material semi-solid state slurries |
| CN104962772B (en) * | 2015-06-02 | 2017-07-11 | 南昌大学 | One kind prepares situ Al3The method of Ti particle REINFORCED Al Si Cu composites |
| CN109797318B (en) * | 2019-04-01 | 2021-08-20 | 重庆大学 | Preparation of Al3Method for Ti reinforcing aluminum-based material |
| CN110747361A (en) * | 2019-11-20 | 2020-02-04 | 中南大学 | Preparation method of titanium boride reinforced aluminum-based composite material based on ultrasonic and mechanical stirring |
| CN112195358A (en) * | 2020-10-14 | 2021-01-08 | 广东省科学院材料与加工研究所 | Aluminum-based alloy, aluminum-based composite material, and preparation method and application thereof |
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| CN1632146A (en) * | 2004-12-31 | 2005-06-29 | 清华大学 | Preparation of aluminium titanium carbide intermediate alloy grain refiner in the ultrasonic field |
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| CN102586635A (en) * | 2011-12-13 | 2012-07-18 | 南昌大学 | Preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry |
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| AU5148596A (en) * | 1995-03-31 | 1996-10-16 | Merck Patent Gmbh | Tib2 particulate ceramic reinforced al-alloy metal-matrix co mposites |
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| CN1632146A (en) * | 2004-12-31 | 2005-06-29 | 清华大学 | Preparation of aluminium titanium carbide intermediate alloy grain refiner in the ultrasonic field |
| CN102296196A (en) * | 2011-09-26 | 2011-12-28 | 江苏大学 | Cross-scale in-situ particle reinforced aluminum matrix composite material and preparation method thereof |
| CN102586635A (en) * | 2011-12-13 | 2012-07-18 | 南昌大学 | Preparation method of situ Al2O3-particle reinforced Al-Si-Cu composite material semi-solid slurry |
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Effective date of registration: 20201010 Address after: Dan Ji Zhen Ma Zhuang Cun, Tongshan District, Xuzhou City, Jiangsu Province Patentee after: TONGSHAN COUNTY FENGHUA INDUSTRY & TRADE Co.,Ltd. Address before: 999 No. 330000 Jiangxi province Nanchang Honggutan University Avenue Patentee before: Nanchang University |