CN103981391B - Magnesium borate crystal whisker and carborundum particle reinforced aluminum matrix composites and preparation method - Google Patents
Magnesium borate crystal whisker and carborundum particle reinforced aluminum matrix composites and preparation method Download PDFInfo
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Abstract
The present invention relates to material technology field, specifically relate to a kind of magnesium borate crystal whisker and carborundum particle and mix two-phase reinforced aluminum matrix composites and preparation method. Magnesium borate crystal whisker of the present invention and carborundum particle reinforced aluminum matrix composites volume fraction proportioning: magnesium borate crystal whisker 3% (volume fraction); Carborundum particle 3% (volume fraction); Surplus is aluminium alloy. Preparation method of the present invention is: the preparation of Combination reinforcement; Stirring casting method preparation mixes type aluminum matrix composite ingot casting; Hot extrusion ingot blank. Beneficial effect of the present invention: the present invention has prepared magnesium borate crystal whisker by rational design technology and carborundum particle mixes the aluminum matrix composite that two-phase strengthens, improve the serious problem of carborundum particle sedimentation phenomenon in preparation process, improve the dispersiveness of whisker in composite, whisker and particle have played synergistic enhancing effect in composite, have effectively improved the mechanical property of aluminum matrix composite.
Description
Technical field
The present invention relates to new material technology field, specifically relate to a kind of magnesium borate crystal whisker and carborundum particle and mixTwo-phase reinforced aluminum matrix composites and preparation method.
Background technology
More to the composite research of single carborundum particle and the enhancing of single magnesium borate crystal whisker at present. But to boric acidThe aluminum matrix composite research that magnesium whisker and carborundum particle mix enhancing there is not yet report. Jin Pei roc seminar is to antifungin crystalline substancePreparation technology and the performance of the magnesium base composite material that must strengthen have been carried out comprehensive research, find that the introducing of magnesium borate crystal whisker hasEffect raising mechanical property and the friction and wear behavior of magnesium base composite material, the stability under high temperature improves, but thisThe composite that research makes is high-volume fractional, and the technique of employing is vacuum pressure THROUGH METHOD, and matrix is magnesium alloy. WithShi Ben seminar utilizes stirring casting method to prepare the aluminum matrix composite that low volume fraction magnesium borate crystal whisker strengthens, compositeFriction and wear behavior compare matrix alloy and improve, but whisker is tighter at the middle agglomeration of matrix alloyHeavy, therefore solve the dispersion problem of whisker in matrix alloy, be to improve low volume fraction magnesium borate crystal whisker reinforced aluminium base againThe key of condensation material mechanical property.
The aluminum-base composite material that Xiao Daihong and Huang Baiyun research shows to utilize carborundum particle prepared by stirring casting method to strengthenThough expect that its hardness of relative matrix alloy and anti-wear performance have had significantly raising, tensile property obviously reduces. This be mainly byHave sharp-pointed corner in carborundum particle, the hot mispairing between particle and matrix is simultaneously larger, therefore in sharp-pointed forward position, cornerCan produce huge internal stress, cause serious stress to concentrate, in the time that composite is subject to external force, wedge angle position very easily scratches baseBody, thus micro-crack produced, and micro-crack constantly germinates diffusion, thereby the tensile property of composite is sharply reduced. Profit simultaneouslyWhile preparing composite with stirring casting method there is sedimentation in particle, causes Local enrichment, and the performance that improves composite also canCause adverse effect.
Lv Yingbin etc. utilize salt-mixture reaction in-situ method to prepare SiC, TiB2It is aluminium base multiple that two-phase miscellaneous granules strengthensCondensation material, compares with the composite that single particle strengthens, and due to the synergistic enhancing effect that mixes of particle, makes hybrid composite manner materialElastic modelling quantity and the tensile property of material have had obvious lifting. And the sedimentation phenomenon of silicon-carbide particle has obtained significantlySuppress, make the dispersion of particle in composite be tending towards even. Byung-ChulKo and Yeon-ChulYoo utilize powder smeltingGold legal system is for the SiCw of a series of different proportionings and the aluminum matrix composite of SiCp enhancing, to the mechanical property research of compositeShow, in the time that the proportioning of SiCw and SiCp is 1:1, composite can obtain the highest intensity.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency existing for prior art, and a kind of magnesium borate crystal whisker and carbon are providedSiClx particulate reinforcement aluminum matrix composite and preparation method.
Preparation method of the present invention is: the preparation of Combination reinforcement; Stirring casting method preparation mixes type aluminum-base composite materialMaterial ingot casting; Hot extrusion ingot blank.
Magnesium borate crystal whisker of the present invention and carborundum particle reinforced aluminum matrix composites volume fraction proportioning:
Magnesium borate crystal whisker 3% (volume fraction);
Carborundum particle 3% (volume fraction);
Surplus is aluminium alloy;
Aluminium alloy is: 6000 series alloys, alloy designations is 6061, chemical composition (mass percent wt%): Mg-0.86%,Si-0.65%,Cu-0.25%,Mn-0.15%,Zn-0.25%,Cr-0.15%,Ti-0.15%,Fe-0.7%Al-Surplus.
Preparation method of the present invention comprises the steps:
(1) preparation process of mixed type reinforcement
(1.1) calculating of matrix and reinforcement and weighing;
First 6061 aluminium ingots are weighed, then according to the Mass Calculation of aluminium ingot and weigh magnesium borate crystal whisker and carborundum grainSon, makes the volume fraction of two kinds of reinforcements respectively account for 3%;
(1.2) the mixed powder of reinforcement grinds;
By admixed together to load weighted magnesium borate crystal whisker and carborundum particle, hand lapping 30 minutes, makes two kinds of increasingsStrong body tentatively mixes, and makes macroscopic view reunion carry out preliminary dispersion to whisker and particle together;
(1.3) ultrasonic dispersion;
To mix in the large capacity beaker of latter two reinforcement powder transfer to, and add appropriate alcohol, be that alcohol willReinforcement powder fully floods, and beaker is put into ultrasonic vessel and carry out ultrasonic dispersion 40 minutes;
(1.4) dry
Mixing reinforcement powder after ultrasonic is put into a vertical drying oven, 80 DEG C of temperature constant, horizontal blast, to powderDry 24 hours;
(2) stirring casting method is prepared as cast condition composite ingot casting step
(2.1) melting aluminum alloy;
Will be in advance load weighted 6061 aluminium alloy cast ingots put into a steel crucible, be heated to 750 DEG C with medium-frequency induction furnace, treatAfter aluminium alloy melts completely, medium-frequency induction furnace power is turned down, and temperature of aluminum liquid is controlled to 640 DEG C, make aluminium liquid keep halfSolid-state;
(2.2) mechanical agitation;
Agitator is inserted in aluminium liquid, makes it occupy crucible center, turn on agitator, makes its rotating speed be controlled at 350r/Min, now produces a whirlpool on aluminium liquid surface, and mixing reinforcement powder is joined in whirlpool slowly, and it is rolled up with whirlpoolEnter in aluminium liquid, after reinforcement powder adds completely, then continue to stir 20 minutes;
(2.3) ultrasonic processing;
One power ultrasonic generator is inserted in aluminium liquid, medium-frequency induction furnace power is tuned up simultaneously, again by temperatureBe elevated to 750 DEG C, open ultrasonic wave, continue ultrasonic 10 minutes;
(2.4) casting
After ultrasonic, close electric induction furnace, execute Composite Melt and slightly do coolingly, be then cast to one preheated in advanceGraphite jig in, mold preheating temperature is 300 DEG C, obtains as cast condition composite ingot casting after cooling;
(3) hot extrusion ingot blank step
Hot extrusion is carried out on the horizontal light-alloy extruder of 200t section bar; Lubricated mould before extruding, heating ingot blank temperature arrives400～450 DEG C of scopes, extrusion die is heated to 400 DEG C; The ingot blank heating is pushed to recipient, after insulation 40min, start to squeezePress, extrusion ratio is 10:1, extruding rate is 0.6m/min, recipient diameter is φ 90mm, extrusion axis under the effect of main plunger,Force ingot blank in recipient to flow out nib; Be processed into bar by above hot extrusion process, preparation completes.
A kind of magnesium borate crystal whisker of the present invention and carborundum particle reinforced aluminum matrix composites and preparation method and prior artThe following beneficial effect of having compared: a kind of magnesium borate crystal whisker of the present invention and carborundum particle enhancing aluminum-base composite material and preparation methodTo carry out improved preparation technology for enhancement method in aluminum matrix composite. Prepare antifungin by rational design technologyWhisker and carborundum particle mix the aluminum matrix composite that two-phase strengthens. Improve carborundum particle sedimentation in preparation process existingResemble serious problem, improved the dispersiveness of whisker in composite, whisker and particle have played collaborative in compositeEnhancement effect, has improved the mechanical property of aluminum matrix composite effectively.
Due to magnesium borate crystal whisker and aluminum substrate wetability bad, in the aluminium liquid of melting be difficult for disperse, agglomeration is serious,Carborundum particle sedimentation phenomenon in aluminium liquid is serious simultaneously, can cause Local enrichment, thereby cause the aluminum-base composite of single enhancingMaterial property is not ideal enough. The present invention, by rational technological design, adopts whisker and carborundum particle two-phase to mix enhancing sideFormula, has improved the dispersiveness of whisker in aluminum substrate effectively, has delayed carborundum particle sinking in aluminium liquid in preparation processReduction of speed degree, has eliminated the enrichment phenomenon of carborundum particle, has effectively improved the mechanical property of composite. The present invention adopts and stirsMix casting and prepare magnesium borate crystal whisker and carborundum particle and mix the aluminum matrix composite that two-phase strengthens, cast in mechanical agitationThe group that the characteristic (particle and aluminum substrate have good wetability) of easily disperseing in aluminium liquid by particle in journey is broken up whiskerPoly-, the introducing of whisker has simultaneously increased the dynamic viscosity of aluminum melt, thereby has delayed the sinking speed of particle. Divide by signAnalyse, find carborundum particle and whisker favorable dispersibility in matrix alloy, compare the aluminum-base composite material that single whisker strengthensMaterial, in hybrid composite, whisker has better dispersiveness, and the sedimentation phenomenon of carborundum particle has obtained effectivelyInhibition, in composite, almost do not find particle rich region. Interaction between particle and whisker makes them at matrixMiddle dispersion is more even, effectively raises the mechanical property of composite.
Detailed description of the invention
Below in conjunction with embodiment to a kind of magnesium borate crystal whisker of the present invention and carborundum particle reinforced aluminum matrix composites and systemPreparation Method technical scheme is further described.
Embodiment 1.
The proportioning of a kind of magnesium borate crystal whisker and carborundum particle reinforced aluminum matrix composites is: magnesium borate crystal whisker and carborundumThe volume fraction of two kinds of reinforcements of particle respectively accounts for 3%, and surplus is aluminium alloy; Wherein aluminium alloy is: 6000 series alloys, alloyThe trade mark is 6061, and mass percent wt% is: Mg-0.86%, and Si-0.65%, Cu-0.25%, Mn-0.15%, Zn-0.25%,Cr-0.15%, Ti-0.15%, Fe-0.7%Al-surplus.
The preparation side of a kind of magnesium borate crystal whisker and carborundum particle reinforced aluminum matrix composites comprises the steps:
(1) preparation process of mixed type reinforcement:
(1.1) calculating of matrix and reinforcement and weighing
First 6061 aluminium ingots are weighed, then according to the Mass Calculation of aluminium ingot and weigh magnesium borate crystal whisker and carborundum grainSon, makes the volume fraction of two kinds of reinforcements respectively account for 3%;
(1.2) the mixed powder of reinforcement grinds
By admixed together to load weighted magnesium borate crystal whisker and carborundum particle, hand lapping 30 minutes, makes two kinds of increasingsStrong body tentatively mixes, and makes macroscopic view reunion carry out preliminary dispersion to whisker and particle together;
(1.3) ultrasonic dispersion
To mix in the large capacity beaker of latter two reinforcement powder transfer to, and add appropriate alcohol, be that alcohol willReinforcement powder fully floods, and beaker is put into ultrasonic vessel and carry out ultrasonic dispersion 40 minutes;
(1.4) dry
Mixing reinforcement powder after ultrasonic is put into a vertical drying oven, 80 DEG C of temperature constant, horizontal blast, to powderDry 24 hours;
(2) stirring casting method is prepared as cast condition composite ingot casting step
(2.1) melting aluminum alloy;
Will be in advance load weighted 6061 aluminium alloy cast ingots put into a steel crucible, be heated to 750 DEG C with medium-frequency induction furnace, treatAfter aluminium alloy melts completely, medium-frequency induction furnace power is turned down, and temperature of aluminum liquid is controlled to 640 DEG C, make aluminium liquid keep halfSolid-state;
(2.2) mechanical agitation;
Agitator is inserted in aluminium liquid, makes it occupy crucible center, turn on agitator, makes its rotating speed be controlled at 350r/Min, now produces a whirlpool on aluminium liquid surface, and mixing reinforcement powder is joined in whirlpool slowly, and it is rolled up with whirlpoolEnter in aluminium liquid, after reinforcement powder adds completely, then continue to stir 20 minutes;
(2.3) ultrasonic processing;
One power ultrasonic generator is inserted in aluminium liquid, medium-frequency induction furnace power is tuned up simultaneously, again by temperatureBe elevated to 750 DEG C, open ultrasonic wave, continue ultrasonic 10 minutes;
(2.4) casting
After ultrasonic, close electric induction furnace, execute Composite Melt and slightly do coolingly, be then cast to one preheated in advanceGraphite jig in, mold preheating temperature is 300 DEG C, obtains as cast condition composite ingot casting after cooling;
(3) hot extrusion ingot blank step
Hot extrusion is carried out on the horizontal light-alloy extruder of 200t section bar; Lubricated mould before extruding, heating ingot blank temperature arrives400 DEG C, extrusion die is heated to 400 DEG C; The ingot blank heating is pushed to recipient, after insulation 40min, start extruding, extrusion ratioFor 10:1, extruding rate is 0.6m/min, and recipient diameter is φ 90mm, and extrusion axis, under the effect of main plunger, forces extrudingIn cylinder, ingot blank flows out nib; Be processed into bar by above hot extrusion process, preparation completes.
The aluminium alloy key property using in the present invention is (under room temperature):
Elastic modelling quantity: 69GPa
Tensile strength: 124MPa
Proof strength of non-proportional: 116MPa
Percentage elongation: 25.0%
The magnesium borate crystal whisker key property using in the present invention is:
Average length: 10 ~ 50 μ m
Average diameter: 0.2 ~ 6 μ m
Density: 2.91g/cm3
Hot strength: 3.92GPa
Elastic modelling quantity: 264.6GPa
Carborundum particle key property used in the present invention:
Average diameter: 10 μ m
Density: 3.2g/cm3
Elastic modelling quantity: 450GPa
Thermal coefficient of expansion: 8.0 × 10-6/℃
The performance that mixes type aluminum matrix composite (under room temperature) of preparing in the present invention:
Tensile strength: 245Mpa
Elastic modelling quantity: 117.3GPa
Density: 2.71～2.73g/cm3
Percentage elongation: 10.2%
That in the present invention, prepares mixes the performance of type aluminum matrix composite at 150 DEG C of temperature:
Tensile strength: 196MPa
Proof strength of non-proportional: 182MPa
Elongation after fracture: 12.3%
That in the present invention, prepares mixes the performance of type aluminum matrix composite at 250 DEG C of temperature:
Tensile strength: 132MPa
Proof strength of non-proportional: 129MPa
Elongation after fracture: 15.4%.
Embodiment 2.
Magnesium borate crystal whisker of the present invention mixes two-phase reinforced aluminum matrix composites proportioning and embodiment 1 phase with carborundum particleWith. The preparation side that magnesium borate crystal whisker and carborundum particle mix two-phase reinforced aluminum matrix composites comprises the steps:
(1) preparation process of mixed type reinforcement:
(1.1) calculating of matrix and reinforcement and weighing
First 6061 aluminium ingots are weighed, then according to the Mass Calculation of aluminium ingot and weigh magnesium borate crystal whisker and carborundum grainSon, makes the volume fraction of two kinds of reinforcements respectively account for 3%;
(1.2) the mixed powder of reinforcement grinds
By admixed together to load weighted magnesium borate crystal whisker and carborundum particle, hand lapping 30 minutes, makes two kinds of increasingsStrong body tentatively mixes, and makes macroscopic view reunion carry out preliminary dispersion to whisker and particle together;
(1.3) ultrasonic dispersion
To mix in the large capacity beaker of latter two reinforcement powder transfer to, and add appropriate alcohol, be that alcohol willReinforcement powder fully floods, and beaker is put into ultrasonic vessel and carry out ultrasonic dispersion 40 minutes;
(1.4) dry
Mixing reinforcement powder after ultrasonic is put into a vertical drying oven, 80 DEG C of temperature constant, horizontal blast, to powderDry 24 hours;
(2) stirring casting method is prepared as cast condition composite ingot casting step
(2.1) melting aluminum alloy;
Will be in advance load weighted 6061 aluminium alloy cast ingots put into a steel crucible, be heated to 750 DEG C with medium-frequency induction furnace, treatAfter aluminium alloy melts completely, medium-frequency induction furnace power is turned down, and temperature of aluminum liquid is controlled to 640 DEG C, make aluminium liquid keep halfSolid-state;
(2.2) mechanical agitation;
Agitator is inserted in aluminium liquid, makes it occupy crucible center, turn on agitator, makes its rotating speed be controlled at 350r/Min, now produces a whirlpool on aluminium liquid surface, and mixing reinforcement powder is joined in whirlpool slowly, and it is rolled up with whirlpoolEnter in aluminium liquid, after reinforcement powder adds completely, then continue to stir 20 minutes;
(2.3) ultrasonic processing;
One power ultrasonic generator is inserted in aluminium liquid, medium-frequency induction furnace power is tuned up simultaneously, again by temperatureBe elevated to 750 DEG C, open ultrasonic wave, continue ultrasonic 10 minutes;
(2.4) casting
After ultrasonic, close electric induction furnace, execute Composite Melt and slightly do coolingly, be then cast to one preheated in advanceGraphite jig in, mold preheating temperature is 300 DEG C, obtains as cast condition composite ingot casting after cooling;
(3) hot extrusion ingot blank step
Hot extrusion is carried out on the horizontal light-alloy extruder of 200t section bar; Lubricated mould before extruding, heating ingot blank temperature arrives425 DEG C, extrusion die is heated to 400 DEG C; The ingot blank heating is pushed to recipient, after insulation 40min, start extruding, extrusion ratioFor 10:1, extruding rate is 0.6m/min, and recipient diameter is φ 90mm, and extrusion axis, under the effect of main plunger, forces extrudingIn cylinder, ingot blank flows out nib; Be processed into bar by above hot extrusion process, preparation completes.
Embodiment 3.
Magnesium borate crystal whisker of the present invention mixes two-phase reinforced aluminum matrix composites proportioning and embodiment 1 phase with carborundum particleWith. The preparation side that magnesium borate crystal whisker and carborundum particle mix two-phase reinforced aluminum matrix composites comprises the steps:
(1) preparation process of mixed type reinforcement:
(1.1) calculating of matrix and reinforcement and weighing
First 6061 aluminium ingots are weighed, then according to the Mass Calculation of aluminium ingot and weigh magnesium borate crystal whisker and carborundum grainSon, makes the volume fraction of two kinds of reinforcements respectively account for 3%;
(1.2) the mixed powder of reinforcement grinds
By admixed together to load weighted magnesium borate crystal whisker and carborundum particle, hand lapping 30 minutes, makes two kinds of increasingsStrong body tentatively mixes, and makes macroscopic view reunion carry out preliminary dispersion to whisker and particle together;
(1.3) ultrasonic dispersion
To mix in the large capacity beaker of latter two reinforcement powder transfer to, and add appropriate alcohol, be that alcohol willReinforcement powder fully floods, and beaker is put into ultrasonic vessel and carry out ultrasonic dispersion 40 minutes;
(1.4) dry
Mixing reinforcement powder after ultrasonic is put into a vertical drying oven, 80 DEG C of temperature constant, horizontal blast, to powderDry 24 hours;
(2) stirring casting method is prepared as cast condition composite ingot casting step
(2.1) melting aluminum alloy;
Will be in advance load weighted 6061 aluminium alloy cast ingots put into a steel crucible, be heated to 750 DEG C with medium-frequency induction furnace, treatAfter aluminium alloy melts completely, medium-frequency induction furnace power is turned down, and temperature of aluminum liquid is controlled to 640 DEG C, make aluminium liquid keep halfSolid-state;
(2.2) mechanical agitation;
Agitator is inserted in aluminium liquid, makes it occupy crucible center, turn on agitator, makes its rotating speed be controlled at 350r/Min, now produces a whirlpool on aluminium liquid surface, and mixing reinforcement powder is joined in whirlpool slowly, and it is rolled up with whirlpoolEnter in aluminium liquid, after reinforcement powder adds completely, then continue to stir 20 minutes;
(2.3) ultrasonic processing;
One power ultrasonic generator is inserted in aluminium liquid, medium-frequency induction furnace power is tuned up simultaneously, again by temperatureBe elevated to 750 DEG C, open ultrasonic wave, continue ultrasonic 10 minutes;
(2.4) casting
After ultrasonic, close electric induction furnace, execute Composite Melt and slightly do coolingly, be then cast to one preheated in advanceGraphite jig in, mold preheating temperature is 300 DEG C, obtains as cast condition composite ingot casting after cooling;
(3) hot extrusion ingot blank step
Hot extrusion is carried out on the horizontal light-alloy extruder of 200t section bar; Lubricated mould before extruding, heating ingot blank temperature arrives450 DEG C, extrusion die is heated to 400 DEG C; The ingot blank heating is pushed to recipient, after insulation 40min, start extruding, extrusion ratioFor 10:1, extruding rate is 0.6m/min, and recipient diameter is φ 90mm, and extrusion axis, under the effect of main plunger, forces extrudingIn cylinder, ingot blank flows out nib; Be processed into bar by above hot extrusion process, preparation completes.
Claims (1)
1. magnesium borate crystal whisker and a carborundum particle reinforced aluminum matrix composites, is characterized in that: magnesium borate crystal whisker and carbonizationThe volume fraction of two kinds of reinforcements of silicon particle respectively accounts for 3%, and surplus is aluminium alloy; Wherein aluminium alloy is: 6000 series alloys, closeThe gold trade mark is 6061, and mass percent wt% is: Mg-0.86%, Si-0.65%, Cu-0.25%, Mn-0.15%, Zn-0.25%, Cr-0.15%, Ti-0.15%, Fe-0.7%Al-surplus;
Described magnesium borate crystal whisker and carborundum particle reinforced aluminum matrix composites are made by being prepared as follows method:
(1) preparation process of mixed type reinforcement:
(1.1) calculating of matrix and reinforcement and weighing
First 6061 aluminium ingots are weighed, then according to the Mass Calculation of aluminium ingot and weigh magnesium borate crystal whisker and carborundum particle,Make the volume fraction of two kinds of reinforcements respectively account for 3%;
(1.2) the mixed powder of reinforcement grinds
By admixed together to load weighted magnesium borate crystal whisker and carborundum particle, hand lapping 30 minutes, makes two kinds of reinforcementsPreliminary mixing, and make macroscopic view reunion carry out preliminary dispersion to whisker and particle together;
(1.3) ultrasonic dispersion
To mix in the large capacity beaker of latter two reinforcement powder transfer to, and add appropriate alcohol, alcohol will be strengthenedBody powder fully floods, and beaker is put into ultrasonic vessel and carry out ultrasonic dispersion 40 minutes;
(1.4) dry
Mixing reinforcement powder after ultrasonic is put into a vertical drying oven, 80 DEG C of temperature constant, horizontal blast, carries out powderDry 24 hours;
(2) stirring casting method is prepared as cast condition composite ingot casting step
(2.1) melting aluminum alloy;
Will be in advance load weighted 6061 aluminium alloy cast ingots put into a steel crucible, be heated to 750 DEG C with medium-frequency induction furnace, treat that aluminium closesAfter gold melts completely, medium-frequency induction furnace power is turned down, and temperature of aluminum liquid is controlled to 640 DEG C, make aluminium liquid keep semisolid;
(2.2) mechanical agitation;
Agitator is inserted in aluminium liquid, makes it occupy crucible center, turn on agitator, makes its rotating speed be controlled at 350r/min,Now produce a whirlpool on aluminium liquid surface, mixing reinforcement powder is joined in whirlpool slowly, it is rolled into whirlpoolIn aluminium liquid, after reinforcement powder adds completely, then continue to stir 20 minutes;
(2.3) ultrasonic processing;
One power ultrasonic generator is inserted in aluminium liquid, medium-frequency induction furnace power is tuned up simultaneously, again temperature is raiseTo 750 DEG C, open ultrasonic wave, continue ultrasonic 10 minutes;
(2.4) casting
After ultrasonic, close electric induction furnace, Composite Melt is slightly done cooling, be then cast to a prior preheated stoneIn China ink mould, mold preheating temperature is 300 DEG C, obtains as cast condition composite ingot casting after cooling;
(3) hot extrusion ingot blank step
Hot extrusion is carried out on the horizontal light-alloy extruder of 200t section bar; Lubricated mould before extruding, heating ingot blank temperature to 400～450 DEG C of scopes, extrusion die is heated to 400 DEG C; The ingot blank heating is pushed to recipient, after insulation 40min, start extruding, squeezePressure ratio is 10:1, and extruding rate is 0.6m/min, and recipient diameter is φ 90mm, and extrusion axis, under the effect of main plunger, forcesIn recipient, ingot blank flows out nib; Be processed into bar by above hot extrusion process, preparation completes.
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| CN104233018B (en) * | 2014-08-26 | 2017-02-15 | 盐城市鑫洋电热材料有限公司 | Reinforced aluminum alloy and preparation method thereof |
| CN105385876B (en) * | 2014-11-27 | 2017-07-28 | 哈尔滨工业大学 | Nano SiC granule strengthens the shaped device and forming method of 7075 aluminum matrix composite semi solid slurries |
| CN109396401A (en) * | 2018-10-31 | 2019-03-01 | 宁波华源精特金属制品有限公司 | A kind of automatic pedal |
| CN110863160A (en) * | 2019-11-11 | 2020-03-06 | 中国科学院上海硅酸盐研究所 | SIALON whisker reinforced aluminum matrix composite material and preparation method thereof |
| CN113523005B (en) * | 2021-07-12 | 2022-09-13 | 福建祥鑫轻合金制造有限公司 | Extrusion method of low-volume-fraction ceramic particle reinforced aluminum-based composite bar |
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