CN107815571A - A kind of preparation technology of the rare earth aluminum alloy material with good corrosion resistance - Google Patents
A kind of preparation technology of the rare earth aluminum alloy material with good corrosion resistance Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The invention discloses a kind of preparation technology of the rare earth aluminum alloy material with good corrosion resistance, belong to technical field of aluminium alloy preparation.Described rare earth aluminum alloy material, including the following raw material：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, refining agent, grain refiner, described rare earth aluminum alloy material are by melting, refining, skimming, made of the step such as casting.Using the technique of the present invention, the decay resistance of rare earth aluminum alloy material is remarkably improved.
Description
Technical field
The invention belongs to technical field of aluminium alloy preparation, and in particular to a kind of rare earth aluminium with good corrosion resistance closes
The preparation technology of golden material.
Background technology
Aluminium alloy is most widely used a kind of non-ferrous metal structural material in industry, and it is in Aeronautics and Astronautics, automobile, machine
It is used widely in tool manufacture, ship and chemical industry.With the rapid development of science and technology and industrial economy, aluminium alloy
Demand it is increasing, therefore the research of aluminium alloy also therewith deeply.The extensive use of aluminium alloy promotes aluminium alloy in electric power
The development of industry, while the application field of aluminium alloy has been widened in the development of power industry again.
Base components-power cable of power industry, it is the resource for conveying and distributing electric energy, its basic structure is by line
Core, insulating barrier, screen layer and the part of protective layer four composition.Wherein, core is the current-carrying part of power cable, for conveying electricity
Can, it is the major part of power cable；Insulating barrier by between core and the earth and out of phase core electric equipment compartment each other every
From guarantee electrical energy transportation, it is indispensable part in power cable structure；Protective layer be protect power cable from
The intrusion of introduced contaminants and moisture, and prevent external force from directly damaging power cable.Because copper has good electric conductivity, therefore
Copper is widely used in the core of power cable.With the increasingly scarcity of copper resource, and the content of aluminium is very abundant, therefore replaces copper with aluminium
The concern of researcher is received, aluminium alloy becomes the focus of research as cable conductor at present.
Aluminium alloy cable substitutes copper cable and is increasingly becoming a kind of trend, and is widely applied.Aluminium of the prior art closes
Golden conductor material, has all done in electrical property, decay resistance, mechanical performance, processing characteristics, creep-resistant property etc. and has largely ground
Study carefully and improve, but the electric property under the decay resistance for aluminium alloy cable at low ambient temperatures, and cryogenic conditions
Have much room for improvement with tensile property.
A kind of Chinese patent literature " rare earth aluminium alloy and preparation method thereof (patent No.：ZL201510434656.9 it is) " open
A kind of rare earth aluminium alloy and preparation method thereof.Rare earth aluminium alloy in the invention, by weight percentage, including following component：
1.1-1.3wt% Cu；0.9-1.1wt% V；1.3-1.4wt% Mn；0.45-0.55wt% Sn；0.12-
0.14wt% Cr；0.85-0.98wt% Pr；0.45-0.66wt% Er；Surplus is aluminium.Rare earth aluminium in the invention closes
Gold utensil have it is excellent process, machinery, electric property, but there is tensile strength, elongation at break are relatively low, corrosion resistance is poor
Problem.
The content of the invention
It is an object of the invention to provide a kind of preparation technology of the rare earth aluminum alloy material with good corrosion resistance, with
Solve in a kind of Chinese patent literature " rare earth aluminium alloy and preparation method thereof (patent No.：ZL201510434656.9 it is) " disclosed
On the basis of aluminium alloy formula, how to optimize component, dosage, method etc., improve the tensile strength of aluminium alloy, elongation at break and resistance to
Corrosivity.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of preparation technology of the rare earth aluminum alloy material with good corrosion resistance, comprises the following steps：
S1：Add aluminium in electromagnetic induction furnace, rise temperature makes its fusing to 850-900 DEG C, and addition is wrapped up with aluminium foil
The silicon of weight ratio, manganese, copper, the melting of lanthanum powder, and alloy melt is stirred, after stirring 12-14min, carry out at degasification
Reason, stand, be then ultrasonically treated, obtain aluminium-silicon-manganese-copper-lanthanum alloy intermediate, the temperature of supersound process is 780-800
DEG C, ultrasonic power 20-25KW, processing time 26-35min；Prepared using identical method among aluminium-titanium-carbon-cerium alloy
Body；Grain refiner is made in aluminium-silicon-manganese-copper-lanthanum alloy intermediate and aluminium-titanium-carbon-cerium alloy intermediate by weight, institute
The size for stating grain refiner is less than 15 μm；
S2：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten are put into by weight
Melted in smelting furnace, obtain molten aluminium alloy；
S3：After molten aluminium alloy is warming up into 745-760 DEG C, the grain refiner stirring of parts by weight is added；
S4：The refining agent of parts by weight is added in the liquation of gained in step s3, while is passed through inert gas, is stirred continuously
Refined, it is 730-750 DEG C to control refining temperature, and liquation is carried out after refining to take off Slag treatment, then cools down, stands 30-
40min；
S5：The molten aluminium alloy of gained in step S3 is subjected to casting；
S6：460-510 DEG C, 6-10h solution treatment are carried out to casting, the rare earth aluminium with good corrosion resistance is made
Alloy material.
Further, described rare earth aluminum alloy material, in units of parts by weight, including following raw material：Aluminium 1200-1850
Part, copper 12-19 parts, vanadium 5-8 parts, manganese 2-6 parts, tin 4-8 parts, chromium 1-3 parts, rare earth element 20-38 parts, titanium carbide 10-15 parts, carbon
Change tungsten 8-12 parts, tungsten silicide 7-9 parts, tungsten 3-5 parts, refining agent 15-20 parts, grain refiner 26-35 parts.
Further, described rare earth aluminum alloy material, in units of parts by weight, including following raw material：1620 parts of aluminium, copper
16 parts, 7 parts of vanadium, 5 parts of manganese, 7 parts of tin, 2 parts of chromium, 32 parts of rare earth element, 14 parts of titanium carbide, 10 parts of tungsten carbide, 8 parts of tungsten silicide, tungsten 4
Part, 18 parts of refining agent, 30 parts of grain refiner.
The invention has the advantages that：
(1) it is the tensile strength of aluminium alloy made from embodiment 1-3, disconnected from embodiment 1-3 and the data of comparative example 8
Split elongation and corrosion resistance is significantly higher than the tensile strength of aluminium alloy, elongation at break and corrosion resistance made from comparative example 8；
Simultaneously from embodiment 1-3 data, embodiment 1 is optimum embodiment.
(2) from embodiment 1 and comparative example 1-7 data, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, crystalline substance
Grain fining agent serves synergy in aluminium alloy is prepared, and significantly improves tensile strength, the extension at break of aluminum alloy materials
Rate and corrosion resistance；This is：Rare earth element belongs to typical metallic element, and activity is strong, at high temperature easily with being dissolved in aluminium liquid
Nonmetallic inclusion element interaction, pass through chemically react generation compound.Rare Earth Elements of Praseodymium, erbium, samarium, dysprosium, holmium, yttrium add
Add, rare earth hydride can be generated with hydrogen, will not assemble to form bubble with hydrogen existing for compound form, effectively inhibit bubble
Appearance, reduce pin hole rate in aluminium, there is certain dehydrogenation, refining and catharsis, so as to improve the tension of aluminum alloy materials
Intensity, elongation at break and corrosion resistance；Molten aluminium alloy after melting is carried out to the change of nano silicon carbide and nanometer tungsten carbide
Matter processing, the nanometer forming core and nano titanium carbide formed with nano-scale and high surface particle in molten aluminium alloy and
Nanometer tungsten carbide particle dispersion is evenly distributed on matrix, and it has high rigidity, high-melting-point, high temperature resistant, size small and the spread
The characteristics of high, increase the core amounts of forming core in crystallization process, reduce crystallite dimension, refined crystal grain, nano titanium carbide,
Dispersion hardening during the high surface and crystal grain thinning of nanometer tungsten carbide, tungsten silicide and tungsten powder, effectively raise aluminium conjunction
The hardness and toughness of gold, so as to improve tensile strength, elongation at break and corrosion resistance；Grain refiner can hinder crystal grain
Growth so that aluminum grain refinement, be advantageous to crack initiation position and expansion path in aluminium alloy fracture process and change
Become so that aluminium alloy obtains toughening, so as to improve the tensile strength of aluminum alloy materials, elongation at break；Meanwhile grain refiner with
The rare earth element of this formula is used together, and can be enabled aluminum alloy to intensity and be significantly improved, this is relevant with to its Grain Refinement Effect, makes
Open grain structure is recovering with being effectively controlled in recrystallization process, after homogenizing annealing, obtains the fine grain group of dispersion-strengtherning
Knit, so as to strengthen tensile strength and corrosion resistance.
(3) rare earth element in the present invention, titanium carbide, tungsten carbide, tungsten silicide, tungsten, grain refiner be as reinforcement system,
Embodiment 1-3 by control rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, grain refiner weight ratio be (20-
38):(10-15):(8-12):(7-9):(3-5):(26-35), realize and system is used as using rare earth element in whole reinforcement system
Leading role raw material, it is while brilliant using nano titanium carbide, nanometer tungsten carbide, the high surface of tungsten silicide and tungsten powder and refinement
Dispersion hardening performance during grain, grain refiner can hinder the growth of crystal grain so that aluminum grain refinement, be advantageous to aluminium
Crack initiation position and expansion path change during alloy fracture so that aluminium alloy obtains toughening.So that whole mend
Strong system applies in the rare earth aluminum alloy material of the present invention tensile strength, the extension at break that can effectively improve aluminum alloy materials
Rate and corrosion resistance.
Embodiment
For ease of more fully understanding the present invention, it is illustrated by following instance, these examples belong to the protection of the present invention
Scope, but do not limit the scope of the invention.
In embodiment, the rare earth aluminum alloy material with good corrosion resistance, in units of parts by weight, including
Following raw material：Aluminium 1200-1850 parts, copper 12-19 parts, vanadium 5-8 parts, manganese 2-6 parts, tin 4-8 parts, chromium 1-3 parts, rare earth element 20-
38 parts, titanium carbide 10-15 parts, tungsten carbide 8-12 parts, tungsten silicide 7-9 parts, tungsten 3-5 parts, refining agent 15-20 parts, grain refiner
26-35 parts；
The rare earth element is in units of parts by weight, including following raw material：Praseodymium 7-9 parts, erbium 2-6 parts, samarium 1-3 parts, dysprosium 3-5
Part, holmium 5-8 parts, yttrium 2-7 parts；
The refining agent is in units of parts by weight, including following raw material：Sodium chloride 10-20 parts, sodium fluoride 8-16 parts, graphite
5-7 parts, calcirm-fluoride 3-6 parts；
The grain refiner is in units of parts by weight, including following raw material：Aluminium-silicon-manganese-copper-lanthanum alloy intermediate 7-
15 parts, aluminium-titanium-carbon-cerium alloy intermediate 3-6 parts；Aluminium, silicon, manganese, copper, the lanthanum of the aluminium-silicon-manganese-copper-lanthanum alloy intermediate
Weight ratio be (75-86):(1.2-3.8):(2.2-7):(1.3-5):(0.9-1.2)；Among the aluminium-titanium-carbon-cerium alloy
Aluminium, titanium, carbon, the weight ratio of cerium of body are (85-98):(1.2-1.9):(0.6-1.2):(0.3-0.5)；
The preparation technology of the rare earth aluminum alloy material with good corrosion resistance, comprises the following steps：
S1：Add aluminium in electromagnetic induction furnace, rise temperature makes its fusing to 850-900 DEG C, and addition is wrapped up with aluminium foil
The silicon of weight ratio, manganese, copper, the melting of lanthanum powder, and alloy melt is stirred, after stirring 12-14min, carry out at degasification
Reason, stand, be then ultrasonically treated, obtain aluminium-silicon-manganese-copper-lanthanum alloy intermediate, the temperature of supersound process is 780-800
DEG C, ultrasonic power 20-25KW, processing time 26-35min；Prepared using identical method among aluminium-titanium-carbon-cerium alloy
Body；Grain refiner is made in aluminium-silicon-manganese-copper-lanthanum alloy intermediate and aluminium-titanium-carbon-cerium alloy intermediate by weight, institute
The size for stating grain refiner is less than 15 μm；
S2：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten are put into by weight
Melted in smelting furnace, obtain molten aluminium alloy；
S3：After molten aluminium alloy is warming up into 745-760 DEG C, the grain refiner stirring of parts by weight is added；
S4：The refining agent of parts by weight is added in the liquation of gained in step s3, while is passed through inert gas, is stirred continuously
Refined, it is 730-750 DEG C to control refining temperature, and liquation is carried out after refining to take off Slag treatment, then cools down, stands 30-
40min；
S5：The molten aluminium alloy of gained in step S3 is subjected to casting；
S6：460-510 DEG C, 6-10h solution treatment are carried out to casting, the rare earth aluminium with good corrosion resistance is made
Alloy material.
Below by more specific embodiment, the present invention will be described.
Embodiment 1
A kind of rare earth aluminum alloy material with good corrosion resistance, in units of parts by weight, including following raw material：Aluminium
1620 parts, 16 parts of copper, 7 parts of vanadium, 5 parts of manganese, 7 parts of tin, 2 parts of chromium, 32 parts of rare earth element, 14 parts of titanium carbide, 10 parts of tungsten carbide, silication
8 parts of tungsten, 4 parts of tungsten, 18 parts of refining agent, 30 parts of grain refiner；
The rare earth element is in units of parts by weight, including following raw material：8 parts of praseodymium, 4 parts of erbium, 2 parts of samarium, 4 parts of dysprosium, holmium 7
Part, 6 parts of yttrium；
The refining agent is in units of parts by weight, including following raw material：16 parts of sodium chloride, 15 parts of sodium fluoride, 6 parts of graphite,
5 parts of calcirm-fluoride；
The grain refiner is in units of parts by weight, including following raw material：Aluminium-silicon-manganese-copper-lanthanum alloy intermediate 12
Part, aluminium-titanium-carbon -5 parts of cerium alloy intermediate；Aluminium, silicon, manganese, copper, the weight of lanthanum of the aluminium-silicon-manganese-copper-lanthanum alloy intermediate
Amount is than being 82:3:5:4:1；Aluminium, titanium, carbon, the weight ratio of cerium of the aluminium-titanium-carbon-cerium alloy intermediate are 94:1.6:1:
0.4；
The preparation technology of the rare earth aluminum alloy material with good corrosion resistance, comprises the following steps：
S1：Add aluminium in electromagnetic induction furnace, rise temperature makes its fusing, the weight that addition is wrapped up with aluminium foil to 885 DEG C
The silicon of part ratio, manganese, copper, the melting of lanthanum powder, and alloy melt is stirred, after stirring 13min, degassing processing is carried out, is stood,
Then it is ultrasonically treated, obtains aluminium-silicon-manganese-copper-lanthanum alloy intermediate, the temperature of supersound process is 790 DEG C, ultrasonic power
For 24KW, processing time 30min；Aluminium-titanium-carbon-cerium alloy intermediate is prepared using identical method；By aluminium-silicon-manganese-copper-
Grain refiner, the chi of the grain refiner is made in lanthanum alloy intermediate and aluminium-titanium-carbon-cerium alloy intermediate by weight
Very little is less than 15 μm；
S2：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten are put into by weight
Melted in smelting furnace, obtain molten aluminium alloy；
S3：After molten aluminium alloy is warming up into 750 DEG C, the grain refiner stirring of parts by weight is added；
S4：The refining agent of parts by weight is added in the liquation of gained in step s3, while is passed through inert gas, is stirred continuously
Refined, it is 745 DEG C to control refining temperature, and liquation is carried out after refining to take off Slag treatment, then cools down, stands 35min；
S5：The molten aluminium alloy of gained in step S3 is subjected to casting；
S6：500 DEG C, 9h solution treatment are carried out to casting, the rare earth aluminium alloy material with good corrosion resistance is made
Material.
Embodiment 2
A kind of rare earth aluminum alloy material with good corrosion resistance, in units of parts by weight, including following raw material：Aluminium
1200 parts, 19 parts of copper, 8 parts of vanadium, 6 parts of manganese, 8 parts of tin, 3 parts of chromium, 20 parts of rare earth element, 10 parts of titanium carbide, 8 parts of tungsten carbide, silication
7 parts of tungsten, 3 parts of tungsten, 15 parts of refining agent, 26 parts of grain refiner；
The rare earth element is in units of parts by weight, including following raw material：7 parts of praseodymium, 6 parts of erbium, 1 part of samarium, 5 parts of dysprosium, holmium 5
Part, 7 parts of yttrium；
The refining agent is in units of parts by weight, including following raw material：20 parts of sodium chloride, 8 parts of sodium fluoride, 7 parts of graphite, fluorine
Change 3 parts of calcium；
The grain refiner is in units of parts by weight, including following raw material：Aluminium-silicon-manganese-copper-lanthanum alloy intermediate 7
Part, aluminium-titanium-carbon -6 parts of cerium alloy intermediate；Aluminium, silicon, manganese, copper, the weight of lanthanum of the aluminium-silicon-manganese-copper-lanthanum alloy intermediate
Amount is than being 75:1.2:7:5:1.2；Aluminium, titanium, carbon, the weight ratio of cerium of the aluminium-titanium-carbon-cerium alloy intermediate are 98:1.9:
0.6:0.3；
The preparation technology of the rare earth aluminum alloy material with good corrosion resistance, comprises the following steps：
S1：Add aluminium in electromagnetic induction furnace, rise temperature makes its fusing, the weight that addition is wrapped up with aluminium foil to 850 DEG C
The silicon of part ratio, manganese, copper, the melting of lanthanum powder, and alloy melt is stirred, after stirring 14min, degassing processing is carried out, is stood,
Then it is ultrasonically treated, obtains aluminium-silicon-manganese-copper-lanthanum alloy intermediate, the temperature of supersound process is 780 DEG C, ultrasonic power
For 20KW, processing time 35min；Aluminium-titanium-carbon-cerium alloy intermediate is prepared using identical method；By aluminium-silicon-manganese-copper-
Grain refiner, the chi of the grain refiner is made in lanthanum alloy intermediate and aluminium-titanium-carbon-cerium alloy intermediate by weight
Very little is less than 15 μm；
S2：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten are put into by weight
Melted in smelting furnace, obtain molten aluminium alloy；
S3：After molten aluminium alloy is warming up into 745 DEG C, the grain refiner stirring of parts by weight is added；
S4：The refining agent of parts by weight is added in the liquation of gained in step s3, while is passed through inert gas, is stirred continuously
Refined, it is 730 DEG C to control refining temperature, and liquation is carried out after refining to take off Slag treatment, then cools down, stands 40min；
S5：The molten aluminium alloy of gained in step S3 is subjected to casting；
S6：460 DEG C, 10h solution treatment are carried out to casting, the rare earth aluminium alloy material with good corrosion resistance is made
Material.
Embodiment 3
A kind of rare earth aluminum alloy material with good corrosion resistance, in units of parts by weight, including following raw material：Aluminium
1850 parts, 12 parts of copper, 5 parts of vanadium, 2 parts of manganese, 4 parts of tin, 1 part of chromium, 38 parts of rare earth element, 15 parts of titanium carbide, 12 parts of tungsten carbide, silication
9 parts of tungsten, 5 parts of tungsten, 20 parts of refining agent, 35 parts of grain refiner；
The rare earth element is in units of parts by weight, including following raw material：9 parts of praseodymium, 2 parts of erbium, 3 parts of samarium, 3 parts of dysprosium, holmium 8
Part, 2 parts of yttrium；
The refining agent is in units of parts by weight, including following raw material：10 parts of sodium chloride, 16 parts of sodium fluoride, 5 parts of graphite,
6 parts of calcirm-fluoride；
The grain refiner is in units of parts by weight, including following raw material：Aluminium-silicon-manganese-copper-lanthanum alloy intermediate 15
Part, aluminium-titanium-carbon -3 parts of cerium alloy intermediate；Aluminium, silicon, manganese, copper, the weight of lanthanum of the aluminium-silicon-manganese-copper-lanthanum alloy intermediate
Amount is than being 86:3.8:2.2:1.3:0.9；Aluminium, titanium, carbon, the weight ratio of cerium of the aluminium-titanium-carbon-cerium alloy intermediate are 85:
1.2:1.2:0.5；
The preparation technology of the rare earth aluminum alloy material with good corrosion resistance, comprises the following steps：
S1：Add aluminium in electromagnetic induction furnace, rise temperature makes its fusing, the weight that addition is wrapped up with aluminium foil to 900 DEG C
The silicon of part ratio, manganese, copper, the melting of lanthanum powder, and alloy melt is stirred, after stirring 12-14min, degassing processing is carried out, it is quiet
Put, be then ultrasonically treated, obtain aluminium-silicon-manganese-copper-lanthanum alloy intermediate, the temperature of supersound process is 800 DEG C, ultrasonic work(
Rate is 25KW, processing time 26min；Aluminium-titanium-carbon-cerium alloy intermediate is prepared using identical method；By aluminium-silicon-manganese-
Grain refiner is made in copper-lanthanum alloy intermediate and aluminium-titanium-carbon-cerium alloy intermediate by weight, the grain refiner
Size is less than 15 μm；
S2：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten are put into by weight
Melted in smelting furnace, obtain molten aluminium alloy；
S3：After molten aluminium alloy is warming up into 760 DEG C, the grain refiner stirring of parts by weight is added；
S4：The refining agent of parts by weight is added in the liquation of gained in step s3, while is passed through inert gas, is stirred continuously
Refined, it is 750 DEG C to control refining temperature, and liquation is carried out after refining to take off Slag treatment, then cools down, stands 3min；
S5：The molten aluminium alloy of gained in step S3 is subjected to casting；
S6：510 DEG C, 6h solution treatment are carried out to casting, the rare earth aluminium alloy material with good corrosion resistance is made
Material.
Comparative example 1
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, grain refiner in the raw material of aluminum alloy materials.
Comparative example 2
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack rare earth element in the raw material of aluminum alloy materials.
Comparative example 3
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack titanium carbide in the raw material of aluminum alloy materials.
Comparative example 4
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack tungsten carbide in the raw material of aluminum alloy materials.
Comparative example 5
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack tungsten silicide in the raw material of aluminum alloy materials.
Comparative example 6
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack tungsten in the raw material of aluminum alloy materials.
Comparative example 7
It is essentially identical with the preparation technology of embodiment 1, have only the difference is that preparing the rare earth with good corrosion resistance
Lack grain refiner in the raw material of aluminum alloy materials.
Comparative example 8
Using a kind of Chinese patent literature " rare earth aluminium alloy and preparation method thereof (patent No.：ZL201510434656.9)”
Embodiment 1-6 technique prepares aluminium alloy.
Performance test is carried out to aluminium alloy made from embodiment 1-3 and comparative example 1-8 as the method for comparative example 8, as a result such as
Shown in following table.
As seen from the above table：(1) from embodiment 1-3 and the data of comparative example 8, aluminium alloy made from embodiment 1-3
Tensile strength, elongation at break and corrosion resistance are significantly higher than the tensile strength of aluminium alloy, elongation at break made from comparative example 8
And corrosion resistance；Simultaneously from embodiment 1-3 data, embodiment 1 is optimum embodiment.
(2) from embodiment 1 and comparative example 1-7 data, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, crystalline substance
Grain fining agent serves synergy in aluminium alloy is prepared, and significantly improves tensile strength, the extension at break of aluminum alloy materials
Rate and corrosion resistance；This is：Rare earth element belongs to typical metallic element, and activity is strong, at high temperature easily with being dissolved in aluminium liquid
Nonmetallic inclusion element interaction, pass through chemically react generation compound.Rare Earth Elements of Praseodymium, erbium, samarium, dysprosium, holmium, yttrium add
Add, rare earth hydride can be generated with hydrogen, will not assemble to form bubble with hydrogen existing for compound form, effectively inhibit bubble
Appearance, reduce pin hole rate in aluminium, there is certain dehydrogenation, refining and catharsis, so as to improve the tension of aluminum alloy materials
Intensity, elongation at break and corrosion resistance；Molten aluminium alloy after melting is carried out to the change of nano silicon carbide and nanometer tungsten carbide
Matter processing, the nanometer forming core and nano titanium carbide formed with nano-scale and high surface particle in molten aluminium alloy and
Nanometer tungsten carbide particle dispersion is evenly distributed on matrix, and it has high rigidity, high-melting-point, high temperature resistant, size small and the spread
The characteristics of high, increase the core amounts of forming core in crystallization process, reduce crystallite dimension, refined crystal grain, nano titanium carbide,
Dispersion hardening during the high surface and crystal grain thinning of nanometer tungsten carbide, tungsten silicide and tungsten powder, effectively raise aluminium conjunction
The hardness and toughness of gold, so as to improve tensile strength, elongation at break and corrosion resistance；Grain refiner can hinder crystal grain
Growth so that aluminum grain refinement, be advantageous to crack initiation position and expansion path in aluminium alloy fracture process and change
Become so that aluminium alloy obtains toughening, so as to improve the tensile strength of aluminum alloy materials, elongation at break；Meanwhile grain refiner with
The rare earth element of this formula is used together, and can be enabled aluminum alloy to intensity and be significantly improved, this is relevant with to its Grain Refinement Effect, makes
Open grain structure is recovering with being effectively controlled in recrystallization process, after homogenizing annealing, obtains the fine grain group of dispersion-strengtherning
Knit, so as to strengthen tensile strength and corrosion resistance.
Rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, grain refiner in the present invention is real as reinforcement system
Apply a 1-3 by control rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, grain refiner weight ratio be (20-38):
(10-15):(8-12):(7-9):(3-5):(26-35), realize and be used as the master of system using rare earth element in whole reinforcement system
Effect raw material is led, while utilizes the high surface and crystal grain thinning mistake of nano titanium carbide, nanometer tungsten carbide, tungsten silicide and tungsten powder
Dispersion hardening performance in journey, grain refiner can hinder the growth of crystal grain so that aluminum grain refinement, be advantageous to aluminium alloy
Crack initiation position and expansion path change in fracture process so that aluminium alloy obtains toughening.So that whole reinforcing body
System apply in the rare earth aluminum alloy material of the present invention can effectively improve the tensile strength of aluminum alloy materials, elongation at break and
Corrosion resistance.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (3)
1. a kind of preparation technology of the rare earth aluminum alloy material with good corrosion resistance, it is characterised in that including following step
Suddenly：
S1：Add aluminium in electromagnetic induction furnace, rise temperature makes its fusing, the weight that addition is wrapped up with aluminium foil to 850-900 DEG C
The silicon of part ratio, manganese, copper, the melting of lanthanum powder, and alloy melt is stirred, after stirring 12-14min, degassing processing is carried out, it is quiet
Put, be then ultrasonically treated, obtain aluminium-silicon-manganese-copper-lanthanum alloy intermediate, the temperature of supersound process is 780-800 DEG C, is surpassed
Acoustical power is 20-25KW, processing time 26-35min；Aluminium-titanium-carbon-cerium alloy intermediate is prepared using identical method；Will
Grain refiner, the crystalline substance is made in aluminium-silicon-manganese-copper-lanthanum alloy intermediate and aluminium-titanium-carbon-cerium alloy intermediate by weight
The size of grain fining agent is less than 15 μm；
S2：Aluminium, copper, vanadium, manganese, tin, chromium, rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten are put into melting by weight
Melted in stove, obtain molten aluminium alloy；
S3：After molten aluminium alloy is warming up into 745-760 DEG C, the grain refiner stirring of parts by weight is added；
S4：The refining agent of parts by weight is added in the liquation of gained in step s3, while is passed through inert gas, is stirred continuously progress
Refining, it is 730-750 DEG C to control refining temperature, and liquation is carried out after refining to take off Slag treatment, then cools down, stands 30-40min；
S5：The molten aluminium alloy of gained in step S3 is subjected to casting；
S6：460-510 DEG C, 6-10h solution treatment are carried out to casting, the rare earth aluminium alloy with good corrosion resistance is made
Material.
2. the preparation technology of the rare earth aluminum alloy material according to claim 1 with good corrosion resistance, its feature
It is, described rare earth aluminum alloy material, in units of parts by weight, including following raw material：Aluminium 1200-1850 parts, copper 12-19
Part, vanadium 5-8 parts, manganese 2-6 parts, tin 4-8 parts, chromium 1-3 parts, rare earth element 20-38 parts, titanium carbide 10-15 parts, tungsten carbide 8-12
Part, tungsten silicide 7-9 parts, tungsten 3-5 parts, refining agent 15-20 parts, grain refiner 26-35 parts.
3. the preparation technology of the rare earth aluminum alloy material according to claim 2 with good corrosion resistance, its feature
It is, described rare earth aluminum alloy material, in units of parts by weight, including following raw material：1620 parts of aluminium, 16 parts of copper, 7 parts of vanadium,
5 parts of manganese, 7 parts of tin, 2 parts of chromium, 32 parts of rare earth element, 14 parts of titanium carbide, 10 parts of tungsten carbide, 8 parts of tungsten silicide, 4 parts of tungsten, refining agent 18
Part, 30 parts of grain refiner.
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| CN109485920A (en) * | 2018-09-29 | 2019-03-19 | 镇江宝海船舶五金有限公司 | A kind of preparation method of the ship anchor chains of anti-corrosion abrasion-resistant |
| CN109825747A (en) * | 2019-01-21 | 2019-05-31 | 广东精美特种型材有限公司 | A kind of high Squeezing ground Cutting free bismuth-containing aluminium alloy of low cost and preparation method thereof |
| CN113355564A (en) * | 2021-05-29 | 2021-09-07 | 安徽佳之合新材料科技有限公司 | Corrosion-resistant aluminum alloy material and application thereof in aluminum alloy railing |
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