CN108251719A - A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf - Google Patents
A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf Download PDFInfo
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- CN108251719A CN108251719A CN201711349150.3A CN201711349150A CN108251719A CN 108251719 A CN108251719 A CN 108251719A CN 201711349150 A CN201711349150 A CN 201711349150A CN 108251719 A CN108251719 A CN 108251719A
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- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- 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
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- 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
- C22F1/053—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 zinc as the next major constituent
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Abstract
The invention discloses a kind of die casting high intensity its processing technologys containing Ca and Hf aluminium yittrium alloy.By weight percentage, the chemical composition of alloy is：Y:0.8‑2.0wt.%,Ba:0.6‑0.8wt.%,Zn:2.5‑3.2wt.%,Ca:0.6‑1.5wt.%,Cu:0.4‑0.9wt.%,Zr:0.1‑0.2wt.%,Hf:0.2‑0.5wt.%,Er:0.6 0.8wt.%, surplus are aluminium.The aluminium yittrium alloy material has good casting character, the compression casting being suitable under the protective atmosphere of thin-walled parts.Casting requirement is particularly suitble to have the lightweight structural material of lightweight feature, there are huge market prospects.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of aluminium yittrium alloy.
Background technology
It is added in aluminium using yttrium as alloying element, is formed aluminium yittrium alloy.Yttrium can improve aluminium alloy elasticity modulus.Generally
For, 1wt.% yttriums are often added into aluminium alloy, elasticity modulus can then rise about 7.3%.Aluminium yittrium alloy is mainly aircraft and boat
Empty space equipment and develop, therefore be also mainly used in aerospace field, be also applied to ordnance and used by nuclear reactor material, it is smooth
In terms of gram armor-piercing bullet, torpedo and other weapons structural members.Aluminium yittrium alloy can be on military aircraft, seating plane and helicopter
It uses, is mainly used for fuselage ring, hatch door, fuel tank etc..Aircraft is manufactured using aluminium yittrium alloy, weight can mitigate
12.6wt.%, conservation of fuel 5.3%, aircraft manufacturing cost can decline 2.1%, can be reduced per the annual flight expense of airplane
2.5%.As the new century is to energy saving and environmentally friendly requirement, application of the aluminium yittrium alloy in Aeronautics and Astronautics and auto industry can be more next
It is more extensive.
Aluminium yittrium alloy is good with following features (1) intensity.Replace conventional high-strength aluminum alloy that can make architecture quality with it
Mitigate 10-20%, rigidity improves 15-20%.(2) it is damping good.With aluminium alloy, steel, iron phase than with relatively low elasticity modulus,
Under similary stress condition, the work of deformation of bigger can be consumed.With noise reduction, shock-absorbing function, larger impact shock load can be born.
(3) aluminium yittrium alloy capability of electromagnetic shielding and heat conductivility are relatively good.Suitable for the clamshell of electronic product, such as phone housing.Aluminium yttrium
The non-ferrous metals such as alloy and aluminium, copper equally have non-spark, are suitble to do mining equiment and powder operation equipment.(4) aluminium yttrium closes
Gold utensil has higher dimensional stability.Due to phase transformation and caused by change in size close to zero, be suitble to do model, fixture and electronics
Product outer cover.(5) dynamic viscosity of aluminium yittrium alloy is low.Identical liquid condition lower charging type speed is much larger than aluminium alloy.In addition,
Alloy melting point is low, specific heat capacity and latent heat of phase change are small, therefore it melts less energy consumption, and setting rate is fast.
But barium and calcium are added in aluminium yittrium alloy, active element is both belonged to, is easy under atmospheric environment and oxygen
Either nitrogen carries out violent reaction and generates burning or explosion gas.In aluminium yittrium alloy smelting process, aluminium yttrium in order to prevent
The oxidizing fire of melt, tradition in generally use protective gas or flux protection melting.（1）Gas shield melting：Gas is protected
Shield melting is typically referred to fill inert gas in aluminium yittrium alloy bath surface in fusion process or can be reacted with aluminium yittrium alloy
The gas of the fine and close protective film of generation, so as to completely cut off the oxygen in air.(2) flux protection melting：The flux of smelting aluminum yittrium alloy
There is covering effect.The flux of melting forms continuous, complete coating by the effect of surface tension in bath surface.Isolation
Air prevents aluminium yittrium alloy and oxygen in air, moisture from reacting, it is therefore prevented that aoxidize.But the use of both methods all because
There is the defects of being difficult to avoid that and be restricted in it.Such as it is also easy to produce toxic gas pollution environment and flux is caused to be mingled with and damage
Evil alloy property.And flux is mingled with and easily becomes the source of corrosion of product in use, accelerated material corrosion, reduces and uses
Service life.In addition, villaumite and villiaumite in flux are volatile at high temperature to generate certain strong corrosive gases, workshop, equipment are destroyed
And ecological environment.
Aluminium-alloy pressure-casting is using additional pressure, by the certain temperature gradient of mold, allows casting by setting
Direction solidification is solidified, obtains the supplement of melt in time with sharp casting.Along with board, mold reasonably designs, stoker, the person of pouring
Correct operation, can just cast out ideal casting.But when aluminium yittrium alloy fills type and feeding is cast, melt cast
And turbulent flow is easily generated in cavity filling process, make the easy volume gas of aluminium alloy and oxidation, thus easily generate in aluminium alloy castings pin hole,
Stomata and the defects of be mingled with.
The present invention provides a kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf, and final products are closed with existing aluminium yttrium
The mechanical property of gold.The aluminium yittrium alloy has low liquid-solid phase solidification temperature range, and hot cracking tendency is big when can solve to cast, casting
Cavity and loose apparent is made, melt treatment is extensive, of poor quality, hot cracking tendency is big, casting character is poor, product yield rate is low,
The technical barriers such as elevated temperature strength is low, waste product material and slag charge reuse difference.Meanwhile the aluminium yittrium alloy material is suitable for thin-walled parts
Compression casting under protective atmosphere is particularly suitble to casting requirement to have the lightweight structural material of lightweight feature, has huge
Market prospects.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of die casting high intensity and is closed containing Ca and Hf aluminium yttrium
Gold.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf.By weight percentage, the composition of alloy is：Y:0.8-
2.0wt.%,Ba:0.6-0.8wt.%,Zn:2.5-3.2wt.%,Ca:0.6-1.5wt.%, Cu:0.4-0.9wt.%,Zr:0.1-
0.2wt.%,Hf:0.2-0.5wt.%,Er:0.6-0.8wt.%, surplus are aluminium.The aluminium yittrium alloy fusion process because volatilization and
The weight for forming the reasons such as clinker and losing is in 2.0-5.0wt.% or so.
The preparation method of above-mentioned aluminium yittrium alloy, includes the following steps：As above the raw material matched is added under atmospheric environment
Electric induction furnace in, and using silicon carbide crucible.Sensing heating forms alloy solution to 700-800 degree, and utilizes electromagnetic agitation
Effect is sufficiently stirred 10 minutes or so.Alloy liquid in the heat preservation of 700-800 degree is stood and is cast to heat top same level after ten minutes
Semi-continuous casting is carried out in equipment, ingot casting moves down speed as 8-10m/min.The ingot casting can regard cast raw material and be used for follow-up work
The compression casting of sequence prepares the aluminium yittrium alloy casting of complicated shape.Vacuum solid solution handles 460 degree, 2.1 hours；At vacuum aging
130 degree, 3.2 hours of reason.
Compared with prior art, the present invention has the advantages that：
（1）The present situation that patent of the present invention can't fully meet existing demand for the casting character of aluminum current yittrium alloy provides
A kind of novel materialogy solution.By novel materialogy method come element species and content in preferred alloy, institute
Product the shortcomings that can not only substantially reducing alloying element usage amount, extraordinary casting character and excellent can also be obtained
Yield of alloy.
（2）The aluminium yittrium alloy has and its excellent flame retardant property under atmospheric environment during smelting.Its mechanism is in aluminium
Specific alloying element is added in yittrium alloy fusion process to influence the thermodynamical reaction of alloy oxidation and dynamic process, is formed
Dense oxidation film and nitride film with protective effect achieve the purpose that prevent alloy vigorous oxidation and nitridation.
（3）The aluminium yittrium alloy casting character that this patent proposes is very excellent.And with good fluidity, filling performance is favourable,
The advantages that shrinkage cavity formability is small, and molten metal is inspiratory small.It can produce the thin of high dimensional accuracy and low surface roughness
Wall casting, die casting wall thickness can reach the casting that minimum wall thickness (MINI W.) is 1mm, can cast out the aperture of a diameter of 0.5mm or so, and general
Aluminium alloy can only cast out minimum wall thickness (MINI W.) for 4mm, the casting of minimum-value aperture 2mm under the conditions of compression casting.
（4）The aluminium alloy is refined crystal grain after yttrium is added in.In addition, the alloy has low liquid-solid phase solidification temperature
Range is spent, the technical barriers such as hot cracking tendency during casting is big, and casting cavity is low with loose apparent product yield rate can be solved.It smelts
Processing method is simple, and production cost is reduced to equipment requirement than relatively low.So that alloy service life is further improved,
Convenient for industrializing large-scale application.
（5）The material has higher than the mechanical property of common aluminium alloy at room temperature：Yield strength is 650-680MPa, tension
Intensity is 740-790MPa, elongation percentage 8-15%.The aluminium yittrium alloy in fusion process because volatilize and form the reasons such as clinker and
The weight of loss is less than 3.0wt.% or so.
Specific embodiment
Embodiment 1
A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf.By weight percentage, the chemical composition of alloy is：Y:
1.6wt.%,Ba:0.7wt.%,Zn:2.9wt.%,Ca:0.8wt.%,Cu:0.5wt.%,Zr:0.1wt.%,Hf:0.3wt.%,Er:
0.7wt.%, surplus are aluminium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace under atmospheric environment,
And using silicon carbide crucible.Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes left sides using galvanomagnetic-effect to 710 degree
It is right.Alloy liquid is cast in 710 degree of heat preservations in the same level equipment of heat top for 10 minutes and carries out semi-continuous casting, ingot casting moves down speed
It spends for 10m/min.The ingot casting can prepare the aluminium yttrium of complicated shape as cast raw material for the compression casting of subsequent handling
Alloy-steel casting.The last heat treatment procedure of these casting is：Vacuum solid solution handles 460 degree, 2.1 hours；Vacuum aging processing 130
Degree, 3.2 hours.The material has higher than the mechanical property of common aluminium alloy at room temperature：Yield strength is 678MPa, tensile strength
For 768MPa, elongation percentage 8.9%.The aluminium yittrium alloy is in fusion process because of the weight for volatilizing and forming the reasons such as clinker and losing
Amount is less than 3.0wt.% or so.
Embodiment 2
A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf.By weight percentage, the chemical composition of alloy is：Y:
1.6wt.%,Ba:0.7wt.%,Zn:2.8wt.%,Ca:0.8wt.%,Cu:0.6wt.%,Zr:0.1wt.%,Hf:0.4wt.%,Er:
0.7wt.%, surplus are aluminium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace under atmospheric environment,
And using silicon carbide crucible.Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes left sides using galvanomagnetic-effect to 740 degree
It is right.Alloy liquid is cast in 740 degree of heat preservations in the same level equipment of heat top for 10 minutes and carries out semi-continuous casting, ingot casting moves down speed
It spends for 9m/min.The ingot casting can be closed as cast raw material for the compression casting of subsequent handling to prepare the aluminium yttrium of complicated shape
Golden casting.The last heat treatment procedure of these casting is：Vacuum solid solution handles 460 degree, 2.1 hours；Vacuum aging processing 130
Degree, 3.2 hours.The material has higher than the mechanical property of common aluminium alloy at room temperature：Yield strength is 653MPa, tensile strength
For 756MPa, elongation percentage 10.5%.The aluminium yittrium alloy is in fusion process because of the weight for volatilizing and forming the reasons such as clinker and losing
Amount is less than 3.0wt.% or so.
Embodiment 3
A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf.By weight percentage, the chemical composition of alloy is：Y:
1.5wt.%,Ba:0.6wt.%,Zn:3.1wt.%,Ca:1.2wt.%,Cu:0.8wt.%,Zr:0.1wt.%,Hf:0.4wt.%,Er:
0.6wt.%, surplus are aluminium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace under atmospheric environment,
And using silicon carbide crucible.Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes left sides using galvanomagnetic-effect to 790 degree
It is right.Alloy liquid is cast in 790 degree of heat preservations in the same level equipment of heat top for 10 minutes and carries out semi-continuous casting, ingot casting moves down speed
It spends for 10m/min.The ingot casting can prepare the aluminium yttrium of complicated shape as cast raw material for the compression casting of subsequent handling
Alloy-steel casting.The last heat treatment procedure of these casting is：Vacuum solid solution handles 460 degree, 2.1 hours；Vacuum aging processing 130
Degree, 3.2 hours.The material has higher than the mechanical property of common aluminium alloy at room temperature：Yield strength is 662MPa, tensile strength
For 776MPa, elongation percentage 9.4%.The aluminium yittrium alloy is in fusion process because of the weight for volatilizing and forming the reasons such as clinker and losing
Amount is less than 3.0wt.% or so.
Claims (3)
1. a kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf, it is characterised in that by weight percentage, alloy chemistry into
It is divided into：Y:0.8-2.0wt.%,Ba:0.6-0.8wt.%,Zn:2.5-3.2wt.%,Ca:0.6-1.5wt.%, Cu:0.4-
0.9wt.%,Zr:0.1-0.2wt.%,Hf:0.2-0.5wt.%,Er:0.6-0.8wt.%, surplus are aluminium.
2. die casting high intensity aluminium yittrium alloy containing Ca and Hf according to claim 1, it is characterised in that the preparation method of alloy
It comprises the following steps：As above the raw material matched is added in the electric induction furnace under atmospheric environment, and using silicon carbide crucible；Sense
It should be heated to 700-800 degree and form alloy solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；By alloy liquid
It stands to be cast to after ten minutes in the same level equipment of heat top in the heat preservation of 700-800 degree and carries out semi-continuous casting, ingot casting moves down speed
For 8-10m/min.
3. die casting high intensity aluminium yittrium alloy containing Ca and Hf according to claim 1, it is characterised in that include following processing step
Suddenly：The ingot casting can prepare the aluminium yittrium alloy casting of complicated shape as cast raw material for the compression casting of subsequent handling；
The last heat treatment procedure of these casting is：Vacuum solid solution handles 460 degree, 2.1 hours；Vacuum aging handles 130 degree, and 3.2 is small
When.
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| CN201711349150.3A CN108251719A (en) | 2017-12-15 | 2017-12-15 | A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf |
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| CN201711349150.3A CN108251719A (en) | 2017-12-15 | 2017-12-15 | A kind of die casting high intensity aluminium yittrium alloy containing Ca and Hf |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837436A (en) * | 2019-03-29 | 2019-06-04 | 华中科技大学 | A kind of wheel pack alloy and preparation method thereof and product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837436A (en) * | 2019-03-29 | 2019-06-04 | 华中科技大学 | A kind of wheel pack alloy and preparation method thereof and product |
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Application publication date: 20180706 |