CN108359823B - A kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy - Google Patents
A kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy Download PDFInfo
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- CN108359823B CN108359823B CN201810314755.7A CN201810314755A CN108359823B CN 108359823 B CN108359823 B CN 108359823B CN 201810314755 A CN201810314755 A CN 201810314755A CN 108359823 B CN108359823 B CN 108359823B
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- 239000000956 alloy Substances 0.000 title claims abstract description 35
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 229910018134 Al-Mg Inorganic materials 0.000 title claims abstract description 25
- 229910018467 Al—Mg Inorganic materials 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 69
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 14
- 238000001192 hot extrusion Methods 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 8
- 238000000713 high-energy ball milling Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 239000011812 mixed powder Substances 0.000 claims abstract description 4
- 238000002161 passivation Methods 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 238000004886 process control Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004663 powder metallurgy Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000011777 magnesium Substances 0.000 description 25
- 239000000463 material Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229910001234 light alloy Inorganic materials 0.000 description 3
- 238000005551 mechanical alloying Methods 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Abstract
The invention belongs to field of powder metallurgy, and in particular to a kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy.Technical scheme is as follows: including the following steps: to weigh Al powder and Mg powder, wherein the atomic ratio of alloy shared by solute Mg atom is 0-8at.%；Ball milling is sufficiently mixed under the low speed of service powder 6 hours first with planetary ball mill, and revolving speed is 180-220 revs/min；Then again at high running speeds to mixed-powder ball milling 36 hours, revolving speed is 480-520 revs/min, Non-intermittent during high-energy ball milling；Passivation Treatment is pressed into powder base；500 DEG C are heated to, then keeps the temperature 2 minutes at 500 DEG C, after keeping the temperature, the powder base of heating is moved into immediately in the extrusion die of preheating and powder base is hot extruded into the hot extrusion pressure bar for diameter 6mm；Heat treatment.Alloy prepared by the present invention has the advantages that low-density, high intensity, high elastic modulus, ultra-fine microstructure and cleaning granular boundary.
Description
Technical field
The invention belongs to field of powder metallurgy, and in particular to a kind of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy
Preparation method.
Background technique
Al-Mg alloy is answered extensively because of its low-density, excellent corrosion resistance, welding performance and good comprehensive mechanical property
For aerospace, marine ship and auto industry.However, since the solid solution that the intensity of the alloy mostlys come from Mg element is strong
Change, so, the intensity of alloy and the concentration for the solute Mg atom being dissolved in Al matrix are closely related.But traditional ingot casting smelting
In 5~6wt.% (mass percent) left and right, which is only capable of mentioning Mg constituent content in the Al-Mg light-alloy of golden method preparation
Increase for limited intensity；In addition, the addition of Mg element also reduces the elasticity modulus of Al.It therefore, is expansion Al-Mg light-alloy
Application range and meet some extreme Service Environments, its intensity and modulus need to be improved.
Refinement crystal grain and addition/introducing the second phase fine particle are strengthening material and the classical way for improving its modulus.Base
In such understanding and understanding, the crystallite dimension of Al-Mg light-alloy is refine to Ultra-fine Grained (100 nanometers of < average grain sizes
1 micron of <) range and thereto introduce Nano grade the second ceramic phase particle will certainly significantly improve material intensity and
Elasticity modulus.The method of known refinement cast metals material microstructure specifically include that Static Recrystallization (room temperature or cold deformation+
Heat treatment), dynamic recrystallization (temperature or thermal deformation) and severe plastic deformation (waiting channel pressings and high pressure torsion) etc..Using above-mentioned
Method prepares super fine crystal material, and material is generally required to have high plastic deformation ability.However, for ingot casting Al-Mg alloy,
The plastic deformation ability of alloy is dissolved Mg atom content by it and is limited, after solute Mg atom content is more than 5.5wt.%, modeling
Property deformability sharply declines, and leads to not carry out necessary deformation processing to it to obtain hyperfine structure.If containing again to high magnesium
Second Phase Particle is added in amount ingot casting Al-Mg alloy, the deformability of alloy can become even worse, and it is even more impossible to carry out plasticity change to it
Shape processing.Therefore, high-strength high-elasticity modulus Second Phase Particle dispersion-strengtherning Ultra-fine Grained Al-Mg alloy is difficult with conventional method
To prepare.
The exploitation that traditional Second Phase Particle strengthens Al-Mg composite material is related to Semi-solid Stirring casting, stirring casting, ultrasound
Assisted casting and pressure-free impregnation etc..Common Second Phase Particle includes: SiC, Al2O3And B4C particle etc..It has following insufficient:
1) microstructure of Al-Mg alloy substrate is coarse.
2) Second Phase Particle size is larger and small volume.
3) Second Phase Particle is easy to reunite and forms particle clusters.
4) alloy substrate and granular boundary, which easily react, generates brittlement phase.
5) strength of materials and elasticity modulus are still relatively low.
Mechanic Alloying Technology can realize the severe plastic deformation and repeatedly of metal ductility powder using superpower mechanical energy
Powder fracture, cold welding, after certain time mechanical alloying, the microstructure of metal powder can be refined to nano-scale.Machine
Tool alloying can not only realize the nanosizing of metal powder, moreover it is possible to efficiently, equably disperse the second phase nano particle to nano junction
In structure metal powder.In conjunction with traditional powder metallurgy consolidation means (such as sintering, hot pressing, warm and hot forging and hot extrusion), machinery is closed
Aurification metal powder can be used to prepare hyperfine structure metal sample and components.
Summary of the invention
The present invention provides a kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy, closes in conjunction with machinery
Aurification technology and reaction in-situ principle, are prepared for MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy in situ, the alloy have low-density,
The advantages of high intensity, high elastic modulus, ultra-fine microstructure and cleaning granular boundary.
Technical scheme is as follows:
A kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy, includes the following steps:
A. Al powder and Mg powder are weighed with precision balance, wherein the atomic ratio of alloy shared by solute Mg atom is 0-
8at.%；Select 1wt.% stearic acid as process control agent, to prevent and avoid the excessive cold welding of powder；
B. load weighted Al powder and Mg powder are put into the ball grinder equipped with stainless steel abrading-ball, the stainless steel abrading-ball is 5
The steel ball of a diameter 20mm and 10 diameter 16mm；Wherein, total matter of the gross mass of Al powder and Mg powder and the stainless steel abrading-ball
The ratio of amount is 5:1；
C. in the glove box full of argon gas, operation is sealed to the ball grinder equipped with stainless steel abrading-ball and powder；
D. it is sufficiently mixed under the low speed of service with planetary ball mill powder 6 hours first, revolving speed is 180-220 revs/min
Clock；Then again at high running speeds to mixed-powder ball milling 36 hours, revolving speed is 480-520 revs/min, nothing during high-energy ball milling
Intermittently；
E. after high-energy ball milling, processing is passivated to the powder after ball milling in standard glove box, followed by liquid
Powder after passivation is pressed into powder base under atmospheric environment by press；Powder base is the circle of diameter 28-30mm and high 25-35mm
Column；
F. in the glove box full of argon gas that powder base is fast using the hydraulic press for being furnished with induction heating system and glove box
Fast induction heating then keeps the temperature 2 minutes at 500 DEG C to 500 DEG C, after keeping the temperature, immediately moves into the powder base of heating
The hot extrusion pressure bar for diameter 6mm is hot extruded into the extrusion die of preheating and by powder base；
G. hot extrusion pressure bar is placed in the 350-550 DEG C of heat treatment for carrying out 1-10 hours；The heat treatment parameter of use are as follows: heating
10 DEG C/min of rate, after being raised to the heat treatment temperature of setting, at such a temperature keep the temperature 5 hours, to soaking time after, stand
Quenched into the water.
The present invention is the high activity using oxygen-containing metastable state Al-Mg alloy powder and magnesium elements, under the conditions of hot activation, Mg
MgO nano particle is generated with O reaction in-situ.It is engaged in material science research and design of material developer is easy to think in the present invention
It slightly expands, can obtain and material system of the material of the present invention without essential distinction on the basis of thinking.So protection of the invention
Point will be covered: 1, utilizing the alloy powder of Al containing magnesium and internal oxidition/external oxidation method preparation MgO dispersion-strengtherning Al alloy material and Al base
Composite material.2, using quickly solidifying oxygen-containing polynary Al alloy powder (containing magnesium) preparation MgO dispersion-strengtherning Al alloy material and Al
Based composites.3, using different oxygen sources (metal oxide, process control agent or oxygen molecule) and the alloy powder of Al containing magnesium or
The element powders of identical element ingredient carry out mechanical alloying to prepare MgO dispersion-strengtherning Al alloy material and Al base composite wood
Material.
The invention has the benefit that
1, oxygen source is rich and varied, for example process control agent, is adsorbed on the oxygen molecule of powder particle surface or can be restored by Mg
Metal oxide etc..
2, the process conditions, parameter of in-situ preparation MgO are easily realized and equipment is simple, are suitble to the production requirement of scale.
3, alloy has the features such as low-density, high intensity, high elastic modulus and high microstructure stability.
4, it can be used to prepare the Ultra-fine Grained Al-Mg based composites containing high MgO volume fraction.
5, reference is provided to prepare high-performance superfine crystalline substance Al-Mg based composites.
Detailed description of the invention
Fig. 1 is the microhardness of Al-Mg alloy sample with the variation relation figure of Mg content and heat treatment temperature, when heat treatment
Between be 5 hours；
Fig. 2 is that the scanning transmission electron microscope of the Ultra-fine Grained Al-2.5at.%Mg alloy of 500 DEG C of heat treatment 5 hours is shone
Piece and corresponding Mg, O element map；Wherein: (a), (b) be scanning transmission electron microscope photo, (c) be Mg element map,
It (d) is O element map.
Specific embodiment
A kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy, includes the following steps:
A. Al powder and Mg powder are weighed with precision balance, wherein the atomic ratio of alloy shared by solute Mg atom is respectively
0at.%, 2.5at.%, 5at.%, 7.5at.%；Select 1wt.% stearic acid as process control agent, to prevent and avoid powder
The excessive cold welding in end；
B. load weighted Al powder and Mg powder are respectively put into the ball grinder equipped with stainless steel abrading-ball, the stainless steel abrading-ball
For the steel ball of 5 diameter 20mm and 10 diameter 16mm；Wherein, the gross mass of Al powder and Mg powder and the stainless steel abrading-ball is total
The ratio of quality is 5:1；
C. in the glove box full of argon gas, operation is sealed to the ball grinder equipped with stainless steel abrading-ball and powder；
D. it is sufficiently mixed under the low speed of service with planetary ball mill powder 6 hours first, revolving speed is 200 revs/min；So
Afterwards again at high running speeds to mixed-powder ball milling 36 hours, revolving speed is 500 revs/min, Non-intermittent during high-energy ball milling；
E. after high-energy ball milling, processing is passivated to the powder after ball milling in standard glove box, followed by liquid
Powder after passivation is pressed into powder base under atmospheric environment by press；Powder base is the cylinder of diameter 30mm and high 25mm；
F. in the glove box full of argon gas that powder base is fast using the hydraulic press for being furnished with induction heating system and glove box
Fast induction heating then keeps the temperature 2 minutes at 500 DEG C to 500 DEG C, after keeping the temperature, immediately moves into the powder base of heating
The hot extrusion pressure bar for diameter 6mm is hot extruded into the extrusion die of preheating and by powder base；
G. hot extrusion sample is cut from the hot extrusion pressure bar of heterogeneity respectively, and part hot extrusion sample is placed in 350-
The heat treatment of 550 DEG C of progress 5 hours；The heat treatment parameter of use are as follows: 10 DEG C/min of heating rate, be raised to the heat treatment of setting
After temperature, at such a temperature keep the temperature 5 hours, to soaking time after, be immediately placed in water carry out quenching obtain qtenched sample:
H. using epoxy resin and curing agent the hot extrusion sample of every kind of ingredient and qtenched sample edge at diameter 30mm and
The cylinder of a height of 15mm inlays sample；After cylinder edge sample hardening, mechanical grinding and polishing treatment are carried out to it；Mechanical grinding process
In, it is successively polished first using #300, #600, #1200, #2000 and #5000SiC sand paper, then with 5 μm of diamond
Suspension is for further processing, and finally uses the SiO of 50nm2Suspension makees last finishing polish processing, polished machine when finishing polish
Velocity of rotation is 150 revs/min；
I. the microhardness of cylinder edge sample in h step is measured, each cylinder edge sample at least measures 10 data points, lower pressure
For 25g, the load time is 15 seconds, and the hardness number of measurement is as shown in Figure 1 with the variation relation of annealing temperature and cylinder edge sample ingredient；
J. the Ultra-fine Grained Al-2.5at.%Mg alloy of 500 DEG C of heat treatment 5 hours is characterized with scanning transmission electron microscope
Sample, shown in (a) in the electromicroscopic photograph such as Fig. 2 of acquisition, (b)；(c) and (d) confirms the presence of nano-MgO particle in Fig. 2.
The preparation method of material of the present invention is related to mechanical alloying, powder compact hot extrusion and heat treatment, belongs to powder smelting
Golden collar domain.So can realize equifinality using obtained oxygen-containing Al-Mg alloyed powder is quickly solidified.Further, since Mg is extremely living
It sprinkles, can be reacted with the metal oxide in-situ preparation nano-MgO particle of reduction activation after it or with added metal oxide
Generate complex oxide.These are all in-situ preparation nano particles containing magnesium, are substantially no different with the present invention.In addition, the present invention selects
Relatively simple binary Al-Mg alloy has been selected as matrix, as scientific research personnel and engineers and technicians, it is easy to expect adding
Extra elements form polynary Al alloy substrate into binary Al-Mg alloy.Above situation can be on the basis of inventive idea
Simple expand is carried out to achieve that.
Claims (1)
1. a kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy, which is characterized in that including walking as follows
It is rapid:
A. Al powder and Mg powder are weighed with precision balance, wherein the atomic ratio of alloy shared by solute Mg atom is 2.5-8at.%；
Select 1wt.% stearic acid as process control agent, to prevent and avoid the excessive cold welding of powder；
B. load weighted Al powder and Mg powder are put into the ball grinder equipped with stainless steel abrading-ball, the stainless steel abrading-ball is 5 straight
The steel ball of 20 mm and 10 16 mm of diameter of diameter；Wherein, the gross mass of the gross mass of Al powder and Mg powder and the stainless steel abrading-ball
Ratio be 5:1；
C. in the glove box full of argon gas, operation is sealed to the ball grinder equipped with stainless steel abrading-ball and powder；
D. it is sufficiently mixed under the low speed of service with planetary ball mill powder 6 hours first, revolving speed is 180-220 revs/min；So
Afterwards again at high running speeds to mixed-powder ball milling 36 hours, revolving speed is 480-520 revs/min, Non-intermittent during high-energy ball milling；
E. after high-energy ball milling, processing is passivated to the powder after ball milling in standard glove box, followed by hydraulic press
The powder after passivation is pressed into powder base under atmospheric environment；Powder base is the cylinder of diameter 28-30mm and high 25-35mm；
F. using the hydraulic press for being furnished with induction heating system and glove box, powder base is quickly felt in the glove box full of argon gas
500 °C should be heated to, then keeps the temperature 2 minutes under 500 °C, after keeping the temperature, the powder base of heating is moved into preheating immediately
Extrusion die in and powder base is hot extruded into the hot extrusion pressure bar for diameter 6mm；
G. hot extrusion pressure bar is placed in the 350-550 °C of heat treatment for carrying out 1-10 hours；The heat treatment parameter of use are as follows: heating rate
10 °C/minute, after being raised to the heat treatment temperature of setting, at such a temperature keep the temperature 5 hours, to soaking time after, put immediately
Enter in water and is quenched.
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| CN201810314755.7A CN108359823B (en) | 2018-04-10 | 2018-04-10 | A kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy |
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| CN201810314755.7A CN108359823B (en) | 2018-04-10 | 2018-04-10 | A kind of preparation method of in-situ preparation MgO dispersion-strengtherning Ultra-fine Grained Al-Mg alloy |
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| EP0353297A4 (en) * | 1988-01-27 | 1990-10-10 | The Dow Chemical Company | A self-reinforced silicon nitride ceramic of high fracture toughness and a method of preparing the same |
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| CN102747254A (en) * | 2012-07-27 | 2012-10-24 | 哈尔滨工业大学 | Reinforced intragranular aluminum matrix composites with nano ceramic particles added externally and preparation process thereof |
| CN102745727A (en) * | 2012-06-13 | 2012-10-24 | 上海大学 | Method for preparing Mg/Al layered double hydroxides through using serpentine |
| CN104630517B (en) * | 2015-01-30 | 2016-08-17 | 华南理工大学 | The preparation method of the aluminum matrix composite that a kind of in-situ particle strengthens |
| CN107502800A (en) * | 2017-09-08 | 2017-12-22 | 燕山大学 | A kind of preparation method of the magnesium-based composite material of nano-MgO particle enhancing |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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