CN108103368A - The tough as-cast aluminum alloy of novel high-strength and preparation method - Google Patents

The tough as-cast aluminum alloy of novel high-strength and preparation method Download PDF

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CN108103368A
CN108103368A CN201711273974.7A CN201711273974A CN108103368A CN 108103368 A CN108103368 A CN 108103368A CN 201711273974 A CN201711273974 A CN 201711273974A CN 108103368 A CN108103368 A CN 108103368A
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alloy
aluminium alloy
refining
cast
tough
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CN201711273974.7A
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Chinese (zh)
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邱丰
李强
姜启川
常芳
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吉林大学
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Priority to CN2017104365041 priority Critical
Priority to CN201710436504.1A priority patent/CN107254610A/en
Application filed by 吉林大学 filed Critical 吉林大学
Publication of CN108103368A publication Critical patent/CN108103368A/en

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Abstract

The present invention relates to the tough as-cast aluminum alloy of novel high-strength and preparation method, including following four step:(1) aluminium alloy matches somebody with somebody when melting;(2) alloy refining;(3) micro reinforced by nanoparticles aluminium alloy;(4) aluminium alloy casting.Technical solution of the present invention be designed by al alloy component, melting, refining, then add in micro nanometer TiB2、NbB2, TiC particle strengthening aluminium alloys, and strictly control the content of Fe, Ti, Zn impurity element, prepare a kind of new high tough as-cast aluminum alloy not being heat-treated.The as-cast aluminum alloy prepared by this technique shows excellent intensity and plasticity.The product can be used for preparing large aluminum alloy structural member, without Overheating Treatment, frocks, man-hour, artificial, the reduction energy energy consumption when largely saving is heat-treated and needed for heat treatment post-equalization, simplify the technological process of production of aluminum alloy junction component, reduce manufacturing cost, there is important application value.

Description

The tough as-cast aluminum alloy of novel high-strength and preparation method

Technical field

The present invention relates to aluminium alloy processing and preparation fields, and in particular to a kind of tough as-cast aluminum alloy of novel high-strength and preparation Method.

Background technology

At present, with the fast development of China's automobile industry, pursue lighter, theory faster, more environmentally friendly and be increasingly becoming vapour The core strategic of garage's industry.There is an urgent need to advanced, lightweight, the vehicle key parts of high-strength tenacity for automobile autonomous innovation Material and manufacturing technology.And it is current, in China's automobile industry, most of white body is steel.Although steel have, intensity is high, The features such as impact resistance is preferable, but its density is larger, it is difficult to realize the lightweight of automobile.And aluminium alloy is as a kind of density It is low, specific strength is high, the preferable alloy of corrosion resistance, will gradually replace part steel stamping parts, become lightweight development it is important Component.Steel are replaced using aluminium alloy, can at most make integral body loss of weight nearly 50%.So aluminium alloy structure The production and research and development of part and its material, the research and development of especially large complicated aluminum alloy junction component and its material are most important, relation To passenger car lightweight development process, technological innovation and light-weighted success or failure, there is important realistic meaning.Part research and development early period The large complicated aluminum alloy junction component that can be applied to passenger car is mostly die casting, and general die casting can not be heat-treated, therefore intensity It is relatively low, plasticity is poor, the requirement of the plasticity and security needed for body structural member can not be met.Other casting methods such as vacuum Die casting, low pressure casting part and tilted casting part, although these types of method can be heat-treated, follow-up heat treatment process is more Complexity, and under high temperature heat-treatable aluminum alloy deformation it is serious, subsequently also need to be corrected aluminum alloy junction component after heat treatment, It can further increase to energy consumption, frock, man-hour, artificial requirement, extend the manufacturing cycle, increase manufacturing cost.Based on Upper reason, current automobile manufacturing industries are badly in need of a kind of new tough as-cast aluminum alloy of height without subsequent heat treatment.Nanometer TiB2、NbB2, TiC ceramic particles there is high-melting-point, high rigidity, good corrosion resistance and very high electrical conductivity, and Size is small, and quantity is more, is all significantly improved by ceramics particle strengthened aluminum alloy materials its intensity, plasticity.Relatively low pottery Porcelain granule content can obtain strengthens effect well, and, but also preparation process is easy, cost is easily controllable for this.By nanometer The as-cast aluminum alloy that grain is strengthened is used directly for the preparation of structural member, and any subsequent heat treatment technique is not required, significantly simplifies The production technology of aluminium alloy.Technical solution of the present invention be designed by al alloy component, melting, refining, then add in Nano-ceramic particle reinforced aluminium alloy, while the content of Fe, Ti, Zn impurity element is strictly controlled, it prepares a kind of new without heat The tough as-cast aluminum alloy of height of processing.The intensity and plasticity of aluminium alloy prepared by the preparation method being related to by this patent have larger The raising of degree, this programme can be to avoid large aluminum alloy component heat treatment process, a large amount of schools after saving heat treatment and heat treatment Just required frock, man-hour, manually, while reduce energy energy consumption, for simplify alloy production technique, reduce cost have it is important Application value.

The content of the invention

Problem to be solved by this invention is to provide a kind of tough as-cast aluminum alloy of novel high-strength and preparation method.

The purpose of the present invention can be achieved through the following technical solutions:

A kind of tough as-cast aluminum alloy of novel high-strength and preparation method, comprise the following steps:

(1) Step 1: aluminium alloy matches somebody with somebody when melting:

With fine aluminium, Al-Si12Intermediate alloy, pure magnesium, fine copper are material preparation.

It is according to the ingredient of aluminium alloy:Si:9.30wt.%~10.5wt.%;Mg:0.39wt.%~2.70wt.%; Cu:0.00wt.%~1.00wt.%;Zn:≤ 0.15wt.%;Ti:≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al prepares aluminium alloy.The raw material for preparing aluminium alloy is added to together in dry smelting furnace, is heated to temperature as 1003- Melting 0.5h~1h under the conditions of 1023K, obtains molten aluminium alloy;

(2) Step 2: alloy refining:

Smelting molten aluminum goes to holding furnace heat preservation, then carries out furnace refining, under the conditions of temperature is 1003-1023K, Rotation is blown to pop one's head in and stretches into heat preservation furnace bottom, chlorine is passed through to molten aluminum from rotation air blowing probe and argon gas is refined, blow 5-10min is handled, measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter.

(3) Step 3: micro reinforced by nanoparticles aluminium alloy:

The 30wt.%TiB containing interior raw nano-ceramic particle is separately added into after gas purification melt2/Al、 30wt.%NbB2/ Al, 30wt.%TiC/Al intermediate alloys.Wherein nanometer TiB2、NbB2, the TiC ceramic particle amounts of being actually added into be 0.02-0.3wt.%, mechanical agitation 2-5min;Ultrasonic probe is dropped into 100mm below liquid level and keeps the temperature 3-8min;Then Ultrasonic equipment is opened, is uniformly dispersed to hybrid alloys liquid using 3-10min, aided nano particle is ultrasonically treated.It is ultrasonically treated Aluminium alloy afterwards adds in 0.05-0.10wt.% aluminum refining agents and carries out refinery by de-gassing, skim, stand 5-10min;By most Afterwards except the molten aluminum of Slag treatment can directly cast;

(4) Step 4: aluminium alloy casting:

Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, the thickness of plate strand is 20mm, Casting is controlled at 973-1003K;

Preferably, refining agent ingredient described in step 3 is:35-50wt.%KCl, 30-40wt.%MgCl2、5- 10wt.%AlF3, 10-15wt.%Na3AlF6,5-10wt.%Mg3N2, 2-5wt.%Na2CO3, 2-5wt.%C2Cl6

Preferably, the material of metal type dies is in step 4:45# steel.The size of metal type dies is:200mm× 150mm×20mm。

The advantageous effect of the invention is:The present invention relates to the tough as-cast aluminum alloy of novel high-strength and preparation method, including with Lower four steps:(1) aluminium alloy matches somebody with somebody when melting;(2) alloy refining;(3) micro reinforced by nanoparticles aluminium alloy;(4) aluminium Alloy casting.Technical solution of the present invention be designed by al alloy component, melting, refining, then add in micro Nanometer TiB2、NbB2, TiC particle strengthening aluminium alloys, and strictly control the content of Fe, Ti, Zn impurity element, prepare a kind of new The tough as-cast aluminum alloy of height that type is not heat-treated.The as-cast aluminum alloy prepared by this technique shows excellent intensity and modeling Property.The product can be used for preparing large aluminum alloy structural member, without Overheating Treatment, a large amount of schools when saving heat treatment and after heat treatment Just required frock, man-hour, manually, energy energy consumption is reduced, simplify the technological process of production of aluminum alloy junction component, reduce and be prepared into This, has important application value.

Specific embodiment

Technological means, character of innovation, reached purpose to realize the present invention are easy to understand, with reference to specific reality Mode is applied, the present invention is further explained.

Embodiment 1:

A kind of tough as-cast aluminum alloy of novel high-strength and preparation method of this example, comprise the following steps:

(1) Step 1: aluminium alloy matches somebody with somebody when melting:With fine aluminium, Al-Si12Intermediate alloy, pure magnesium, fine copper are material preparation. It is according to the ingredient of aluminium alloy:Si:9.80wt.%;Mg:0.39wt.%;Cu:1.00wt.%;Zn:≤ 0.15wt.%;Ti: ≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al, prepares aluminium alloy.The raw material for preparing aluminium alloy is added to together dry In dry smelting furnace, temperature is heated to as melting 0.5h under the conditions of 1023K, obtains molten aluminium alloy;

(2) Step 2: alloy refining:Smelting molten aluminum goes to holding furnace heat preservation, furnace refining is then carried out, in temperature It spends under the conditions of 1023K, rotation to be blown to pop one's head in and stretches into heat preservation furnace bottom, chlorine and argon is passed through from rotation air blowing probe to molten aluminum Gas is refined, and blow processing 5min, measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter.

(3) Step 3: micro reinforced by nanoparticles aluminium alloy:

The 30wt.%TiB containing interior raw nano-ceramic particle is separately added into after gas purification melt2It is closed among/Al Gold.Wherein nanometer TiB2The ceramic particle amount of being actually added into is 0.3wt.%, mechanical agitation 5min;Ultrasonic probe is dropped into liquid 100mm below face simultaneously keeps the temperature 5min;Later on ultrasonic equipment receives hybrid alloys liquid using 10min, auxiliary is ultrasonically treated Rice grain is uniformly dispersed.Aluminium alloy after supersound process add in 0.10wt.% aluminum refining agents carry out refinery by de-gassing, skim, Stand 10min;It can directly cast by the molten aluminum for finally removing Slag treatment;

(4) Step 4: aluminium alloy casting:

Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, the thickness of plate strand is 20mm, Casting is controlled at 1003K;

Wherein, refining agent ingredient described in step 3 is:35wt.%KCl, 45wt.%MgCl2, 5wt.%AlF3、 5wt.%Na3AlF6,5wt.%Mg3N2, 3wt.%Na2CO3, 2wt.%C2Cl6

Wherein, the material of metal type dies is in step 4:45# steel.The size of metal type dies is:200mm×150mm ×20mm。

In the example 1, by 0.3wt.%TiB2The Al-Si of reinforced by nanoparticles processing10-Cu1-Mg0.39Aluminium alloy, Good mechanical performance under its as cast condition:Yield strength is 135.5MPa, tensile strength 271.6MPa, elongation percentage 13.0%. As shown in table 1.

Embodiment 2:

A kind of tough as-cast aluminum alloy of novel high-strength and preparation method of this example, comprise the following steps:

(1) Step 1: aluminium alloy matches somebody with somebody when melting:With fine aluminium, Al-Si12Intermediate alloy, pure magnesium, fine copper are material preparation. It is according to the ingredient of aluminium alloy:Si:10.2wt.%;Mg:0.39wt.%;Cu:1.00wt.%;Zn:≤ 0.15wt.%;Ti: ≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al, prepares aluminium alloy.The raw material for preparing aluminium alloy is added to together dry In dry smelting furnace, temperature is heated to as melting 1h under the conditions of 1003K, obtains molten aluminium alloy;

(2) Step 2: alloy refining:Smelting molten aluminum goes to holding furnace heat preservation, furnace refining is then carried out, in temperature It spends under the conditions of 1003K, rotation to be blown to pop one's head in and stretches into heat preservation furnace bottom, chlorine and argon is passed through from rotation air blowing probe to molten aluminum Gas is refined, and blow processing 8min, measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter.

(3) Step 3: micro reinforced by nanoparticles aluminium alloy:

The 30wt.%NbB containing interior raw nano-ceramic particle is separately added into after gas purification melt2It is closed among/Al Gold.Wherein nanometer NbB2The ceramic particle amount of being actually added into is 0.3wt.%, mechanical agitation 5min;Ultrasonic probe is dropped into liquid 100mm below face simultaneously keeps the temperature 8min;Later on ultrasonic equipment receives hybrid alloys liquid using 5min, auxiliary is ultrasonically treated Rice grain is uniformly dispersed.Aluminium alloy after supersound process add in 0.05wt.% aluminum refining agents carry out refinery by de-gassing, skim, Stand 5min;It can directly cast by the molten aluminum for finally removing Slag treatment;

(4) Step 4: aluminium alloy casting:

Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, the thickness of plate strand is 20mm, Casting is controlled at 973K;

Wherein, refining agent ingredient described in step 3 is:45wt.%KCl, 30wt.%MgCl2, 5wt.%AlF3、 11wt.%Na3AlF6,5wt.%Mg3N2, 2wt.%Na2CO3, 2wt.%C2Cl6

Wherein, the material of metal type dies is in step 4:45# steel.The size of metal type dies is:200mm×150mm ×20mm。

In the example 2, by 0.3wt.%NbB2The Al-Si of reinforced by nanoparticles processing10-Cu1-Mg0.39Aluminium alloy, Good mechanical performance under its as cast condition:Yield strength is 141.7MPa, tensile strength 276.8MPa, elongation percentage 12.4%. As shown in table 1.

Embodiment 3:

A kind of tough as-cast aluminum alloy of novel high-strength and preparation method of this example, comprise the following steps:

(1) Step 1: aluminium alloy matches somebody with somebody when melting:With fine aluminium, Al-Si12Intermediate alloy, pure magnesium are material preparation.According to The ingredient of aluminium alloy is:Si:9.30wt.%;Mg:2.60wt.%;;Zn:≤ 0.15wt.%;Ti:≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al, prepares aluminium alloy.The raw material for preparing aluminium alloy is added to together in dry smelting furnace, heated It is melting 0.5h under the conditions of 1023K to temperature, obtains molten aluminium alloy;

(2) Step 2: alloy refining:

Smelting molten aluminum goes to holding furnace heat preservation, then carries out furnace refining, under the conditions of temperature is 1023K, will revolve Turn to blow to pop one's head in and stretch into heat preservation furnace bottom, be passed through chlorine to molten aluminum from rotation air blowing probe and argon gas is refined, air blowing processing 10min measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter.

(3) Step 3: micro reinforced by nanoparticles aluminium alloy:

The 30wt.%NbB containing interior raw nano-ceramic particle is separately added into after gas purification melt2It is closed among/Al Gold.Wherein nanometer NbB2The ceramic particle amount of being actually added into is 0.02wt.%, mechanical agitation 3min;Ultrasonic probe is dropped to 100mm below liquid level simultaneously keeps the temperature 5min;Later on ultrasonic equipment to hybrid alloys liquid using 5min is ultrasonically treated, aids in Nano particle is uniformly dispersed.Aluminium alloy after supersound process adds in 0.05wt.% aluminum refining agents and carries out refinery by de-gassing, takes off Slag stands 6min;It can directly cast by the molten aluminum for finally removing Slag treatment;

(4) Step 4: aluminium alloy casting:

Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, the thickness of plate strand is 20mm, Casting is controlled at 1003K;

Wherein, refining agent ingredient described in step 3 is:40wt.%KCl, 35wt.%MgCl2, 6wt.%AlF3、 10wt.%Na3AlF6,5wt.%Mg3N2, 2wt.%Na2CO3, 2wt.%C2Cl6

Wherein, the material of metal type dies is in step 4:45# steel.The size of metal type dies is:200mm×150mm ×20mm。

In the example 3, by 0.02wt.%NbB2The Al-Si of reinforced by nanoparticles processing10-Mg2.6Aluminium alloy, casting Good mechanical performance under state:Yield strength is 187.9MPa, tensile strength 269.2MPa, elongation percentage 9.8%.Such as table 1 It is shown.

Embodiment 4:

A kind of tough as-cast aluminum alloy of novel high-strength and preparation method of this example, comprise the following steps:

(1) Step 1: aluminium alloy matches somebody with somebody when melting:

With fine aluminium, Al-Si12Intermediate alloy, pure magnesium are material preparation.

It is according to the ingredient of aluminium alloy:Si:10.5wt.%;Mg:2.70wt.%;Zn:≤ 0.15wt.%;Ti:≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al, prepares aluminium alloy.The raw material for preparing aluminium alloy is added to drying together Smelting furnace in, be heated to temperature as melting 0.5h under the conditions of 1023K, obtain molten aluminium alloy;

(2) Step 2: alloy refining:

Smelting molten aluminum goes to holding furnace heat preservation, then carries out furnace refining, under the conditions of temperature is 1023K, will revolve Turn to blow to pop one's head in and stretch into heat preservation furnace bottom, be passed through chlorine to molten aluminum from rotation air blowing probe and argon gas is refined, air blowing processing 10min measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter.

(3) Step 3: micro reinforced by nanoparticles aluminium alloy:

It is separately added among the 30wt.%TiC/Al containing interior raw nano-ceramic particle and closes after gas purification melt Gold.Wherein the nano TiC ceramic particle amount of being actually added into is 0.02wt.%, mechanical agitation 2min;Ultrasonic probe is dropped into liquid 100mm below face simultaneously keeps the temperature 6min;Later on ultrasonic equipment receives hybrid alloys liquid using 3min, auxiliary is ultrasonically treated Rice grain is uniformly dispersed.Aluminium alloy after supersound process add in 0.10wt.% aluminum refining agents carry out refinery by de-gassing, skim, Stand 10min;It can directly cast by the molten aluminum for finally removing Slag treatment;

(4) Step 4: aluminium alloy casting:

Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, the thickness of plate strand is 20mm, Casting is controlled at 1003K;

Wherein, in 30wt.%TiC/Al intermediate alloys described in step 3 TiC nano particles Ti/C=1:1.

Wherein, refining agent ingredient described in step 3 is:40wt.%KCl, 30wt.%MgCl2, 6wt.%AlF3、 10wt.%Na3AlF6,6wt.%Mg3N2, 4wt.%Na2CO3, 4wt.%C2Cl6

Wherein, the material of metal type dies is in step 4:45# steel.The size of metal type dies is:200mm×150mm ×20mm。

In the example 4, by the Al-Si of 0.3wt.%TiC reinforced by nanoparticles processing10-Mg2.6Aluminium alloy, as cast condition Under good mechanical performance:Yield strength is 181.0MPa, tensile strength 277.2MPa, elongation percentage 9.1%.Such as 1 institute of table Show.

Embodiment 5:

A kind of tough as-cast aluminum alloy of novel high-strength and preparation method of this example, comprise the following steps:

(1) Step 1: aluminium alloy matches somebody with somebody when melting:

With fine aluminium, Al-Si12Intermediate alloy, pure magnesium, fine copper are material preparation.

It is according to the ingredient of aluminium alloy:Si:9.5wt.%;Mg:2.60wt.%;Zn:≤ 0.15wt.%;Ti:≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al, prepares aluminium alloy.The raw material for preparing aluminium alloy is added to drying together Smelting furnace in, be heated to temperature as melting 1h under the conditions of 1003K, obtain molten aluminium alloy;

(2) Step 2: alloy refining:

Smelting molten aluminum goes to holding furnace heat preservation, then carries out furnace refining, under the conditions of temperature is 1003K, will revolve Turn to blow to pop one's head in and stretch into heat preservation furnace bottom, be passed through chlorine to molten aluminum from rotation air blowing probe and argon gas is refined, air blowing processing 6min measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter.

(3) Step 3: micro reinforced by nanoparticles aluminium alloy:

The 30wt.%TiB containing interior raw nano-ceramic particle is separately added into after gas purification melt2It is closed among/Al Gold.Wherein nanometer TiB2The ceramic particle amount of being actually added into is 0.02wt.%, mechanical agitation 5min;Ultrasonic probe is dropped to 100mm below liquid level simultaneously keeps the temperature 3min;Later on ultrasonic equipment to hybrid alloys liquid using 3min is ultrasonically treated, aids in Nano particle is uniformly dispersed.Aluminium alloy after supersound process adds in 0.10wt.% aluminum refining agents and carries out refinery by de-gassing, takes off Slag stands 8min;It can directly cast by the molten aluminum for finally removing Slag treatment;

(4) Step 4: aluminium alloy casting:

Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, the thickness of plate strand is 20mm, Casting is controlled at 973K;

Wherein, refining agent ingredient described in step 3 is:40wt.%KCl, 32wt.%MgCl2, 8wt.%AlF3、 6wt.%Na3AlF6,9wt.%Mg3N2, 2wt.%Na2CO3, 3wt.%C2Cl6

Wherein, the material of metal type dies is in step 4:45# steel.The size of metal type dies is:200mm×150mm ×20mm。

In the example 5, by 0.3wt.%TiB2The Al-Si of reinforced by nanoparticles processing9.5-Mg2.6Aluminium alloy, casting Good mechanical performance under state:Yield strength is 189.2MPa, tensile strength 282.7MPa, elongation percentage 10.2%.Such as table 1 It is shown.

Table 1 is different-alloy ingredient in example 1-5, different refinery practice, at different micro reinforced by nanoparticles aluminium alloys The yield strength of aluminium alloy under science and engineering skill, tensile strength, extension rate score.

Table 1

Sample Yield strength (MPa) Tensile strength (MPa) Elongation percentage (%) Embodiment 1 135.5 271.6 13.0 Embodiment 2 141.7 276.8 12.4 Embodiment 3 187.9 269.2 9.8 Embodiment 4 181.0 277.2 9.1 Embodiment 5 189.2 282.7 10.2

The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (3)

1. a kind of tough as-cast aluminum alloy of novel high-strength and preparation method, it is characterised in that:Comprise the following steps:
(1) aluminium alloy matches somebody with somebody when melting:With fine aluminium, Al-Si12Intermediate alloy, pure magnesium, fine copper are material preparation, according to aluminium alloy Ingredient be:Si:9.30wt.%~10.5wt.%;Mg:0.39wt.%~2.70wt.%;Cu:0.00wt.%~ 1.00wt.%;Zn:≤ 0.15wt.%;Ti:≤ 0.10wt.%;Fe:≤ 0.10wt.%;Surplus is Al, prepares aluminium alloy;It will The raw material for preparing aluminium alloy is added to together in dry smelting furnace, is heated to temperature as melting 0.5h under the conditions of 1003-1023K ~1h, obtains molten aluminium alloy;
(2) alloy refining:Smelting molten aluminum goes to holding furnace heat preservation, then carries out furnace refining, is 1003- in temperature Under the conditions of 1023K, will rotation blow probe stretch into heat preservation furnace bottom, from rotation blow probe to molten aluminum be passed through chlorine and argon gas into Row refining, blow processing 5-10min, measures the liquid hydrogen content of molten aluminum during refining using online hydrogen meter;
(3) micro reinforced by nanoparticles aluminium alloy:It is separately added into after gas purification melt containing interior raw nano-ceramic particle 30wt.%TiB2/ Al, 30wt.%NbB2/ Al, 30wt.%TiC/Al intermediate alloys;Wherein nanometer TiB2、NbB2, TiC pottery The porcelain particle amount of being actually added into is 0.02-0.3wt.%, mechanical agitation 2-5min;Ultrasonic probe is dropped to below liquid level 100mm simultaneously keeps the temperature 3-8min;Later on ultrasonic equipment, to hybrid alloys liquid using supersound process 3-10min, aided nano Particle is uniformly dispersed;Aluminium alloy after supersound process adds in 0.05-0.10wt.% aluminum refining agents and carries out refinery by de-gassing, takes off Slag stands 5-10min;It can directly cast by the molten aluminum for finally removing Slag treatment;
(4) aluminium alloy casting:Molten aluminum is cast in a series of metal type dies into plate aluminium alloy strand, plate strand Thickness for 20mm, cast controlled at 973-1003K.
2. the tough as-cast aluminum alloy of novel high-strength according to claim 1 and preparation method, it is characterised in that:Institute in step 3 Stating refining agent ingredient is:35-50wt.%KCl, 30-40wt.%MgCl2, 5-10wt.%AlF3, 10-15wt.%Na3AlF6、 5-10wt.%Mg3N2, 2-5wt.%Na2CO3, 2-5wt.%C2Cl6
3. the tough as-cast aluminum alloy of novel high-strength according to claim 1 and preparation method, it is characterised in that:It is golden in step 4 The material of genotype mold is:45# steel;The size of metal type dies is:200mm×150mm×20mm.
CN201711273974.7A 2017-06-12 2017-12-06 The tough as-cast aluminum alloy of novel high-strength and preparation method CN108103368A (en)

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CN201711273967.7A CN108080811B (en) 2017-06-12 2017-12-06 Micro-nano TiC-TiB2Granular aluminum alloy welding wire rod
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