CN106756352B - Raw Cr in one kind2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material - Google Patents
Raw Cr in one kind2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C23/00—Alloys based on magnesium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1005—Pretreatment of the non-metallic additives
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- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
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- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
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Abstract
The present invention discloses raw Cr in one kind2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, belong to field of metal matrix composite, using B2O3Powder, Cr2O3Powder is raw material, and well mixed, drying, compacting obtain mixed-powder base, and mixed-powder base is added portionwise into CO2Raw reaction in being carried out in magnesium or magnesium alloy fused mass under gas shield, it is stirred while reaction, after interior raw reaction terminates, adds C2Cl6And MgCO3Admixture refining agent carry out degasification, deslagging refining；Compounding flux is stood, remove surface residual debris after pour into mold, obtain interior raw Cr2B and MgO diphase particles strengthen magnesium-based composite material；Magnesium-based composite material involved in the present invention, there is the Cr of interior life2The interface compatibility of B and MgO particles and matrix is good, and enhancing particle size is controllable, and enhancing distributed mutually is uniform, and the features such as Gao Biqiang, high elastic modulus, technique is simple, is adapted to large-scale production.
Description
Technical field
The present invention relates to raw Cr in one kind2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, belong to gold
Metal-matrix composite material technical field.
Background technology
The density of magnesium is 1.8g/cm3, it is most light nonferrous materials, magnesium and magnesium alloy have high specific strength, Gao Bigang
The characteristic such as degree, preferable electrical and thermal conductivity, good damping shock absorption and capability of electromagnetic shielding, shaping easy to process, navigates in space flight
The fields such as sky, automobile, electronics, communication are widely used.But intensity and the not high, high-temperature creep resistance of rigidity due to magnesium alloy
The shortcomings of and wearing no resistance, limits its application.For the application for improving the performance of magnesium alloy, expanding magnesium alloy, draw
It is an important developing direction to enter particulates reinforcements to carry out complex intensifying to magnesium alloy.
The preparation method of magnesium-based composite material mainly has two kinds at present, when the method for additional particle, such as stirring casting, pressure
Power infusion process, powder metallurgic method etc., these production technologies have additional enhancing, and grain graininess is larger, particle is combined with basal body interface
The deficiencies of bad, particle agglomeration, poor composite materials property；Second, interior life（Fabricated in situ）Particle preparation magnesium-based composite wood
The method of material, the composite of preparation has tiny enhancing particle, surface no-pollution, particle and matrix is compatible, material is comprehensive
Can be good the features such as.The present invention is raw Cr in one kind2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, Cr2B
Have the advantages that high intensity, high rigidity, high elastic modulus, low thermal coefficient of expansion, high-melting-point and heat endurance are good with MgO particles,
The Cr of interior life in magnesium or magnesium alloy2B and MgO particle dispersions are distributed in magnesium matrix, Cr2B and MgO particles are tiny and be evenly distributed,
Clean surface and matrix are well combined no interfacial reaction, and obtained magnesium-based composite material has lightweight, high-strength, high elastic modulus
The features such as, technique is simple, is adapted to large-scale production.
The content of the invention
It is an object of the invention to provide raw Cr in one kind2B and MgO diphase particles strengthen the preparation side of magnesium-based composite material
Method, the preparation method technique is simple, cost is low, and endogenetic particle content and size are controllable, and particle is tiny and Dispersed precipitate is in melt
In, it is clean not generate accessory substance, melt in course of reaction, and obtained composite has lightweight, high-strength, high elastic modulus and good
Good resistance to elevated temperatures and anti-wear performance.
The technical scheme is that：By B2O3Powder, Cr2O3Powder is well mixed, dry, compacting obtains mixed-powder
Base, mixed-powder base is added in CO in batches2In magnesium or magnesium alloy fused mass under gas shield, it is stirred simultaneously；It is interior
After raw reaction terminates, add refining agent and carry out degasification, deslagging refining, compounding flux is stood, remove surface residual debris after pour into casting
Mould, obtain interior raw Cr2B and MgO diphase particles strengthen magnesium-based composite material, comprise the following steps that：
（1）It is prepared by mixed-powder：According to B2O3Powder and Cr2O3The mol ratio of powder is 1:2 ratio, by B2O3Powder and
Cr2O3Powder batch mixing 1~4 hour in batch mixer, then dried 2~4 hours at a temperature of 200~250 DEG C in drying box
Obtain mixed-powder；
（2）Mixed-powder pressed compact：By step（1）The mixed-powder forcing press of acquisition enters under 50~400MPa pressure
Row compacting obtains mixed-powder base；
（3）Magnesium or magnesium alloy melting and heat preservation：By magnesium or magnesium alloy in CO2750~850 DEG C of fusings are heated under gas shield
And 10~30min is incubated, obtain magnesium or magnesium alloy fused mass；
（4）By step（2）The mixed-powder base of acquisition is added in CO in batches2Step under gas shield（3）Magnesium or
In magnesium alloy fused mass, the temperature for controlling reaction is 750~850 DEG C, while is stirred with 100~500r/min mixing speed, is entered
Raw reaction, 70~90min of stirring reaction, is obtained containing Cr after slagging-off in row2The compounding flux of B and MgO diphase particles；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds at 700~740 DEG C into melt
Enter refining agent, addition is the 0.2~1.0% of compounding flux quality, and 5~15min of stirring carries out degasification, deslagging refining, obtains essence
The compounding flux of refining；
（6）Casting forming：By step（5）In obtained compounding flux stand 5~20min at 700~740 DEG C, remove residual
It is cast to after slag in the mold of 200~400 DEG C of preheatings, obtains interior raw Cr2B and MgO biphase ceramic granules strengthen magnesium-based composite wood
Material.
Step（1）The B2O3Powder and Cr2O3The granularity of powder is 100~400 mesh.
Step（3）Described in magnesium or magnesium alloy be one kind in pure magnesium, cast magnesium alloy or wrought magnesium alloy.
Step（4）The mixed-powder addition accounts for the 3.4%~17.16% of magnesium or quality of magnesium alloy.
Step（4）Described in mixed-powder base be equally divided into five batches and be added in magnesium or magnesium alloy fused mass, every time between
It is 5~15min every the time.
Step（5）Described in refining agent be C2Cl6And MgCO3Mixture, wherein C2Cl6And MgCO3Mass ratio be 4 ︰
6。
The interior raw Cr that the present invention obtains2In B and MgO biphase ceramic granules enhancing magnesium-based composite material, Cr2B and MgO two-phases
The size of particle is 90~245nm, Cr2B granular mass percentage compositions are 2~9%, the weight/mass percentage composition of MgO particles is 3.14
~14.13%.
Inventive principle
（1）Cr2The interior raw reaction principle of B and MgO particles
In CO2Under gas shield, by B2O3With Cr2O3Mixing base be added to 750~850 DEG C of magnesium or magnesium alloy fused mass
In, B2O3MgO particles, activity [B] atom, while active [B] atom and Cr are obtained with fusant reaction2O3Reaction obtains B2O3With
Cr2B particles, Cr2The interior raw course of reaction of B and MgO particles is as follows：
Combined reaction is：（3）
It can be obtained according to thermodynamics handbook（1）~（3）Three reaction Gibbs free energys and temperature between relation be：
When temperature is at 750~850 DEG C,（4）~（6）FormulaRespectively less than 0, illustrate that reaction can be carried out.
（2）Cr in composite2B and content of MgO control principle
Pass through（3）Formula can establish the magnesium of reaction consumption or the quality of magnesium alloy respectively, add the quality of mixed-powder base, obtain
Obtain the gross mass of composite and interior life (Cr2B+MgO) the mass fraction of particle（）It
Between relational expression：
（7）
（7）In formula：
When the magnesium or the quality of magnesium alloy weighed is n (quality c, n ＞ c for including reaction consumption magnesium), adds mixed-powder
The quality of base is M（y+z）When, quality n+addition mixed-powder base of the gross mass m of composite=weigh magnesium or magnesium alloy
Mass M, i.e.,：
SoObtain：
（8）
If adding mixing base quality and accounting for, to weigh the percentage of magnesium or quality of magnesium alloy be a, then:
（9）
Because 5.14wt.%≤x≤23.13wt.%, therefore 3.4%≤a≤17.16%；
It is 8% to consider the burn out rate in melting and course of reaction, therefore the quality for actually weighing magnesium or magnesium alloy is：
（10）
（3）Interior raw Cr2B, MgO particle mean sizes R control principle
In the present invention, the Cr of interior life2The average-size of B and MgO particles is controllable, is closed in mixed-powder base and magnesium or magnesium
On the premise of golden melt fully reacts, interior raw Cr2B, the average-size R of MgO particles is mainly the matter by addition mixed-powder base
M, reaction temperature T, reaction time t and mixing speed V are measured to control.
M addition is mainly that have impact on the viscosity size of melt so as to influence the average-size of endogenetic particle；T is mainly
Reaction severe degree and particle growth speed are influenceed so as to influence the average-size of endogenetic particle；T is to influence endogenetic particle to grow up
Factor；V speed have impact on the degree of crushing of matrix dendrite and break up the degree of endogenetic particle reunion so as to influenceing interior life
The average-size of grain, the average-size of endogenetic particle increases with reaction temperature, mixing speed reduces, adds mixed-powder base quality
Increase and the reaction time extends and increased, its correlation is：
(11)
（11）In formula：
Beneficial effects of the present invention
（1）Two-phase is prepared using interior raw reaction method（Cr2B、MgO）Particle reinforced magnesium base compound material, overcome outer addition
The problems such as particle and matrix wetability be poor, interfacial reaction difficult control.
（2）Cr2Content, the size of B and MgO particulates reinforcements are controllable, are evenly distributed in the base, are combined with matrix good
Good, interfacial cleanliness；The Cr of interior life2B and MgO particles are remarkably improved intensity, hardness, modulus of elasticity and the height of magnesium-based composite material
Warm mechanical property.
Brief description of the drawings
Fig. 1 is the process chart of the embodiment of the present invention 1.
Embodiment
Embodiment 1
Raw Cr in one kind described in the present embodiment2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, specifically
Step is as follows：
（1）It is prepared by mixed-powder：Weigh the B of the mesh of 30g granularities 100~1502O3Powder and the mesh of 131g granularities 100~150
Cr2O3Powder, wherein B are 1 with Cr mol ratios:2, batch mixing 1 hour in batch mixer, then with 200 DEG C of temperature in drying box
Dry 2 hours, obtain mixed-powder；
（2）The pressed compact of mixed-powder：By step（1）The mixed-powder of acquisition is carried out with forcing press under 50MPa pressure
Compacting obtains mixed-powder base；
（3）The melting of magnesium alloy：Weigh 5114.4g ZM1 magnesium alloys, the weight/mass percentage composition of magnesium is in the alloy
94.5%, the amount according to magnesium needed for raw reaction in calculating is 93.07g, in CO2Under gas shield, the ZM1 magnesium alloys that will weigh
It is heated to 750 DEG C to melt and be incubated 10min, obtains ZM1 magnesium alloy fused mass；
（4）Interior raw Cr2B and MgO diphase particles：3.4% ratio of quality of magnesium alloy is accounted for according to mixed-powder, takes step
（2）The mixed-powder base of acquisition is simultaneously equally divided into 5 times, is once added to step every 5min（3）ZM1 magnesium alloy fused mass in enter
The reaction of row endogenetic particle, reaction temperature are 750 DEG C, stir 70min during the course of the reaction with 100r/min mixing speed, interior
Raw reaction has been carried out, and magnesium alloy fused mass temperature is maintained at into 700 DEG C, obtained after slagging-off with Cr2The compound of B and MgO particles melts
Body；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds C into melt at 700 DEG C2Cl6
And MgCO3Admixture refining agent, addition is the 0.2% of compounding flux quality, C in admixture refining agent2Cl6And MgCO3Quality
Than for 4 ︰ 6, and degasification, deslagging refining are carried out with graphite rod stirring 5min, the compounding flux refined；
（6）The casting forming of magnesium-based composite material：By step（5）In compounding flux 700 DEG C stand 5min after pour into a mould
Into the mold of 200 DEG C of preheatings, the interior raw Cr that gross mass is 4943.16g is obtained2B and MgO biphase ceramic granules enhancing magnesium-based is answered
Condensation material, wherein Cr2The mass fraction of B particles is that the mass fraction of 2%, MgO particles is 3.14%, Cr2B and MgO particles are averaged
Size is 105nm.
Embodiment 2
Raw Cr in one kind described in the present embodiment2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, specifically
Step is as follows：
（1）It is prepared by mixed-powder：Weigh the B that 70g granularities are 150~200 mesh2O3Powder and 306g granularities are 150~200
Purpose Cr2O3Powder, wherein B are 1 with Cr mol ratios:2, batch mixing 2 hours in batch mixer, then 220 DEG C of dryings in drying box
2.5 hours, obtain mixed-powder；
（2）The pressed compact of mixed-powder：By step（1）The mixed-powder of acquisition is carried out with forcing press under 150MPa pressure
Compacting obtains mixed-powder base；
（3）The melting of magnesium alloy：Weighing 5971.76g ZM5 magnesium alloys, the weight/mass percentage composition of magnesium is 91% in the alloy,
Amount according to raw reaction consumption magnesium in calculating is 217.4g, in CO2Under gas shield, the ZM5 magnesium alloys weighed are heated to
780 DEG C melt and are incubated 20min, obtain ZM5 magnesium alloy fused mass；
（4）Interior raw Cr2B and MgO diphase particles：6.8% ratio for weighing quality of magnesium alloy is accounted for according to mixed-powder, is taken
Step（2）The mixed-powder base of acquisition is simultaneously equally divided into 5 times, is once added to step every 12min（3）ZM5 magnesium alloys melt
The reaction of endogenetic particle is carried out in body, reaction temperature is 780 DEG C, is stirred during the course of the reaction with 200r/min mixing speed
75min, interior raw reaction have carried out, magnesium alloy fused mass temperature are maintained at into 720 DEG C, obtained after slagging-off with Cr2B and MgO particles
Compounding flux；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds C into melt at 720 DEG C2Cl6
And MgCO3Admixture refining agent, addition is the 0.5% of compounding flux quality, C in admixture refining agent2Cl6And MgCO3Quality
Than for 4 ︰ 6, and degasification, deslagging refining are carried out with graphite rod stirring 8min, the compounding flux refined；
（6）The casting forming of magnesium-based composite material：By step（5）In compounding flux 720 DEG C stand 10min after pour into a mould
Into the mold of 270 DEG C of preheatings, the interior raw Cr that gross mass is 5905.4g is obtained2B and MgO biphase ceramic granules enhancing magnesium-based is answered
Condensation material, wherein Cr2The mass fraction of B particles is that the mass fraction of 3.9%, MgO particles is 6.1%, Cr2B and MgO particles are put down
Equal size is 95nm.
Embodiment 3
Raw Cr in one kind described in the present embodiment2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, specifically
Step is as follows：
（1）It is prepared by mixed-powder：Weigh the B that 144g granularities are 230~300 mesh2O3Powder and 629g granularities are 230~300
Purpose Cr2O3Powder, wherein B are 1 with Cr mol ratios:2, batch mixing 3 hours in batch mixer, then with 240 DEG C in drying box
Temperature is dried 3 hours, obtains mixed-powder；
（2）The pressed compact of mixed-powder：By step（1）The mixed-powder of acquisition is carried out with forcing press under 300MPa pressure
Compacting obtains mixed-powder base；
（3）The melting of magnesium alloy：Weighing 7387.9g ZM10 magnesium alloys, the weight/mass percentage composition of magnesium is 89% in the alloy,
Amount according to raw reaction consumption magnesium in calculating is 446.8g, in CO2Under gas shield, the ZM10 magnesium alloys weighed are heated to
800 DEG C melt and are incubated 25min, obtain ZM10 magnesium alloy fused mass；
（4）Interior raw Cr2B and MgO diphase particles：11.3% ratio for claiming quality of magnesium alloy is accounted for according to mixed-powder, takes step
Suddenly（2）The mixed-powder base of acquisition is simultaneously equally divided into 5 times, is added to step per septum secundum 13min（3）The ZM10 magnesium alloys of acquisition melt
The reaction of endogenetic particle is carried out in body, reaction temperature is 800 DEG C, is stirred during the course of the reaction with 350r/min mixing speed
80min, interior raw reaction have carried out, magnesium alloy fused mass temperature are maintained at into 730 DEG C, obtained after slagging-off with Cr2B and MgO particles
Compounding flux；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds C into melt at 730 DEG C2Cl6
And MgCO3Admixture refining agent, addition is the 0.7% of compounding flux quality, C in admixture refining agent2Cl6And MgCO3Quality
Than for 4 ︰ 6, and degasification, deslagging refining are carried out with graphite rod stirring 11min, the compounding flux refined；
（6）The casting forming of magnesium-based composite material：By step（5）In compounding flux 730 DEG C stand 15min after pour into a mould
Into the mold of 340 DEG C of preheatings, the interior raw Cr that gross mass is 7613.7g is obtained2B and MgO biphase ceramic granules enhancing magnesium-based is answered
Condensation material, wherein Cr2The mass fraction of B particles is that the mass fraction of 6.2%, MgO particles is 9.8%, Cr2B and MgO particles are put down
Equal size is 90nm.
Embodiment 4
Raw Cr in one kind described in the present embodiment2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, specifically
Step is as follows：
（1）It is prepared by mixed-powder：Weigh the B that 300g granularities are 300~400 mesh2O3Powder and 1309g granularities be 300~
The Cr of 400 mesh2O3Powder, wherein B are 1 with Cr mol ratios:2, batch mixing 4 hours in batch mixer, then with 250 in drying box
DEG C temperature dry 4 hours, obtain mixed-powder；
（2）The pressed compact of mixed-powder：By step（1）The mixed-powder of acquisition is carried out with forcing press under 400MPa pressure
Compacting obtains mixed-powder base；
（3）The melting of magnesium alloy：Weigh 10126.58g AZ61M magnesium alloys, the weight/mass percentage composition of magnesium is in the alloy
98%, the amount according to raw reaction consumption magnesium in calculating is 930.21g, in CO2Under gas shield, the AZ61M magnesium alloys that will weigh
It is heated to 850 DEG C to melt and be incubated 30min, obtains AZ61M magnesium alloy fused mass；
（4）Interior raw Cr2B and MgO diphase particles：17.16% ratio of quality of magnesium alloy is accounted for according to mixed-powder, takes step
Suddenly（2）The mixed-powder base of acquisition is simultaneously equally divided into 5 times, is added to step per septum secundum 15min（3）The AZ61M magnesium alloys of acquisition
The reaction of endogenetic particle is carried out in melt, reaction temperature is 850 DEG C, is stirred during the course of the reaction with 500r/min mixing speed
90min, interior raw reaction have carried out, magnesium alloy fused mass temperature are maintained at into 740 DEG C, obtained after slagging-off with Cr2B and MgO particles
Compounding flux；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds C into melt at 740 DEG C2Cl6
And MgCO3Admixture refining agent, addition is the 1.0% of compounding flux quality, C in admixture refining agent2Cl6And MgCO3Quality
Than for 4 ︰ 6, and degasification, deslagging refining are carried out with graphite rod stirring 15min, the compounding flux refined；
（6）The casting forming of magnesium-based composite material：By step（3）In Composite Melt 740 DEG C stand 20min after
It is poured into the mold of 400 DEG C of preheatings, obtains the interior raw Cr that gross mass is 10985.46g2B and MgO biphase ceramic granules strengthen
Magnesium-based composite material, wherein Cr2The mass fraction of B particles is that the mass fraction of 9%, MgO particles is 14.13%, Cr2B and MgO
The average-size of grain is 245nm.
Embodiment 5
Raw Cr in one kind described in the present embodiment2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, specifically
Step is as follows：
（1）It is prepared by mixed-powder：Weigh the B that 50g granularities are 200~230 mesh2O3Powder and 218g granularities are 200~230
Purpose Cr2O3Powder, wherein B are 1 with Cr mol ratios:2, batch mixing 1.5 hours in batch mixer, then in drying box 210 DEG C it is dry
Dry 3.5 hours, obtain mixed-powder；
（2）The pressed compact of mixed-powder：By step（1）The mixed-powder of acquisition is carried out with forcing press under 100MPa pressure
Compacting obtains mixed-powder base；
（3）The melting of pure magnesium：5461.13g pure magnesiums are weighed, the purity of the pure magnesium is 99.8%, according to meter
The amount of raw reaction consumption magnesium is 155g in calculation, in CO2Under gas shield, the pure magnesium weighed is heated to 770 DEG C of fusings
And 15min is incubated, obtain pure magnesium melt；
（4）Interior raw Cr2B and MgO diphase particles：5.3% ratio for weighing pure magnesium quality is accounted for according to mixed-powder,
Take step（2）The mixed-powder base of acquisition is simultaneously equally divided into 5 times, is once added to step every 11min（3）The technical pure of acquisition
The reaction of endogenetic particle is carried out in Serum Magnesium, reaction temperature is 770 DEG C, is stirred during the course of the reaction with 150r/min mixing speed
85min is mixed, interior raw reaction has carried out, pure magnesium melt temperature is maintained at into 710 DEG C, obtained after slagging-off with Cr2B and MgO
The compounding flux of particle；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds C into melt at 710 DEG C2Cl6
And MgCO3Admixture refining agent, addition is the 0.3% of compounding flux quality, C in admixture refining agent2Cl6And MgCO3Quality
Than for 4 ︰ 6, and degasification, deslagging refining are carried out with graphite rod stirring 8min, the compounding flux refined；
（6）The casting forming of magnesium-based composite material：By step（5）In compounding flux 710 DEG C stand 8min after pour into a mould
Into the mold of 240 DEG C of preheatings, the interior raw Cr that gross mass is 5324.6g is obtained2B and MgO biphase ceramic granules enhancing magnesium-based is answered
Condensation material, wherein Cr2The mass fraction of B particles is that the mass fraction of 3.1%, MgO particles is 4.9%, Cr2B and MgO particles are put down
Equal size is 154nm.
Above in association with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (4)
1. raw Cr in one kind2B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, it is characterised in that specific steps
Including：
（1）It is prepared by mixed-powder：According to B2O3Powder and Cr2O3The mol ratio of powder is 1:2 ratio, by B2O3Powder and Cr2O3
Powder batch mixing 1~4 hour, then dried 2~4 hours at a temperature of 200~250 DEG C and obtain mixed-powder, the B2O3Powder
And Cr2O3The granularity of powder is 100~400 mesh；
（2）Mixed-powder pressed compact：By step（1）The mixed-powder of acquisition is suppressed under 50~400MPa pressure and mixed
Close powder base；
（3）Magnesium or magnesium alloy melting and heat preservation：By magnesium or magnesium alloy in CO2750~850 DEG C are heated under gas shield to melt and protect
10~30min of temperature, obtains magnesium or magnesium alloy fused mass；
（4）By step（2）The mixed-powder base of acquisition is added in CO in batches2Step under gas shield（3）Magnesium or magnesium alloy
In melt, mixed-powder addition accounts for the 3.4%~17.16% of magnesium or quality of magnesium alloy, and controlling reaction temperature is 750~850 DEG C,
Stirred simultaneously with 100~500r/min mixing speed, raw reaction, 70~90min of stirring reaction, is contained after slagging-off in progress
There is Cr2The compounding flux of B and MgO diphase particles；
（5）Melt refines：By step（4）The temperature control of the compounding flux of gained adds essence into melt at 700~740 DEG C
Agent is refined, addition is the 0.2~1.0% of compounding flux quality, and 5~15min of stirring carries out degasification, deslagging refining, refined
Compounding flux；
（6）Casting forming：By step（5）In obtained compounding flux stand 5~20min at 700~740 DEG C, after removing residue
It is cast in the mold of 200~400 DEG C of preheatings, obtains interior raw Cr2B and MgO biphase ceramic granules strengthen magnesium-based composite material.
2. interior raw Cr according to claim 12B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, its feature
It is, step（3）Described in magnesium or magnesium alloy be one kind in pure magnesium, cast magnesium alloy or wrought magnesium alloy.
3. interior raw Cr according to claim 12B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, its feature
It is, step（4）Described in mixed-powder base be equally divided into five batches and be added in magnesium or magnesium alloy fused mass, during each interval
Between be 5~15min.
4. interior raw Cr according to claim 12B and MgO diphase particles strengthen the preparation method of magnesium-based composite material, its feature
It is, step（5）Described in refining agent be C2Cl6And MgCO3Mixture, wherein C2Cl6And MgCO3Mass ratio be 4 ︰ 6.
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| US6290748B1 (en) * | 1995-03-31 | 2001-09-18 | Merck Pateng Gmbh | TiB2 particulate ceramic reinforced Al-alloy metal-matrix composites |
| CN103014474A (en) * | 2012-12-18 | 2013-04-03 | 江苏新亚特钢锻造有限公司 | Oxide particle reinforced laser cladding nickel-base alloy powder and preparation method thereof |
| CN103045916A (en) * | 2012-12-26 | 2013-04-17 | 四川材料与工艺研究所 | Composite shielding material and preparation method thereof |
| CN105603279A (en) * | 2016-01-27 | 2016-05-25 | 国网山东省电力公司莱阳市供电公司 | Chromium diboride-enhanced magnesium alloy wire for cable and preparation method and application of magnesium alloy wire |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290748B1 (en) * | 1995-03-31 | 2001-09-18 | Merck Pateng Gmbh | TiB2 particulate ceramic reinforced Al-alloy metal-matrix composites |
| CN103014474A (en) * | 2012-12-18 | 2013-04-03 | 江苏新亚特钢锻造有限公司 | Oxide particle reinforced laser cladding nickel-base alloy powder and preparation method thereof |
| CN103045916A (en) * | 2012-12-26 | 2013-04-17 | 四川材料与工艺研究所 | Composite shielding material and preparation method thereof |
| CN105603279A (en) * | 2016-01-27 | 2016-05-25 | 国网山东省电力公司莱阳市供电公司 | Chromium diboride-enhanced magnesium alloy wire for cable and preparation method and application of magnesium alloy wire |
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