CN108251709A - Die casting contains Ca and Re aluminium alloys and its processing technology with high heat conduction - Google Patents
Die casting contains Ca and Re aluminium alloys and its processing technology with high heat conduction Download PDFInfo
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- CN108251709A CN108251709A CN201810220006.8A CN201810220006A CN108251709A CN 108251709 A CN108251709 A CN 108251709A CN 201810220006 A CN201810220006 A CN 201810220006A CN 108251709 A CN108251709 A CN 108251709A
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- casting
- alloy
- die casting
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- aluminium
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses die casting high heat conductions to contain Ca and Re aluminium alloys and its processing technology.According to weight percent, the ingredient of the alloy is：Ca:0.6‑1.5wt.%,Re:1.6‑3.2wt.%；In:3.0‑4.5wt.%,Sc:0.8 1.5wt.%, Mn:0.4‑0.8wt.%,Be:0.2 0.5wt.%, surplus are aluminium.The kalzium metal has excellent die casting performance, and with excellent heat conductivility.It is expected that the development of even entire Die Casting Industry and its technology has positive meaning with being promoted to aluminum alloy die-casting technological.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of kalzium metal.
Background technology
Aluminium alloy is the new material inexpensive, energy saving, of fine quality that domestic and international application is increasingly extensive in recent decades.It has anti-
Tensile strength and hardness are high, damping and amortization is good, wearability is good, friction coefficient is small, friction Temperature Rise is low, material is of low cost etc. excellent with manufacturing
Point.Meanwhile die casting also is cannot be only used for good processing performance, apply also for sand mold, metal mold, graphite mould, continuous casting
Deng.Cast aluminium alloy gold is to fill casting mold with molten metal, obtains the aluminium alloy of variously-shaped part blank.Cast aluminium alloy gold has
Complex-shaped part can be made in good casting character；Huge optional equipment is not needed to；With saving metal, reduce
It cost, the advantages that reducing work hours, is used widely in aircraft industry and civilian industry.With low-density, specific strength is higher, resists
Corrosion and casting manufacturability are good, and the advantages that small is limited by structural design of fittings.Most of be heat-treated is strengthened with reaching
Alloy eliminates the purpose of casting internal stress, stabilizing tissue and accessory size.
Aluminium alloy is widely used in fascia, seat support, gear box casing, direction control system by developed country
On the parts such as component, engine bonnet, car door, engine cylinder body, frame.Auto parts and components, Ke Yixian are manufactured with aluminium alloy
It writes and mitigates car weight, reduce oil consumption, reduce exhaust emissions amount, improve the integrated level of parts, improve flexibility of Automobile Design etc..
Aluminium alloy compression casting is most light in all diecasting alloys, is the light weight material in automobile of pole competitiveness, a large amount of aluminum alloy spare part
It is produced, to replace modeling, aluminium alloy or even steel components.With the development of technology, aluminium alloy is in the application of automotive field
Range can be wider.
The progress of new technology has pushed the development of the material technologies such as the smelting of aluminium, alloying, simultaneously because aluminium alloy makes
It is constantly challenged with field, new requirement is constantly proposed, therefore aluminium alloy is also evolving to the performance of aluminium and aluminium alloy
To adapt to the needs of industrial development.Although China's aluminium alloy compression casting industry has very big resources advantage, most at present
Aluminium alloy compression casting enterprise, using traditional aluminium diecasting alloy.The die-casting process of this kind of traditional material is largely led to
Process goal could finally be realized by crossing a large amount of, macrocyclic repetition test modification.Therefore in casting mold development cycle, cast design matter
Processing quality measured and its realized etc. is relatively difficult to guarantee so that enterprise also can not obtain bigger in market with keen competition
Breakthrough.
High-quality die-casting aluminium alloy is developed for promoting China's independent research fine work new material, captures international fine work green wood
Expect that market has facilitation.The innovation and optimization of bottom property are carried out with aluminium alloy to conventional cast, to aluminium alloy compression casting work
The development of the even entire Die Casting Industry of skill and its technology has positive meaning with being promoted.Oneself external die casting through exploitation is with novel
Aluminium alloy casting character and heat transfer property can't be satisfactory.Exploitation, which has suitable die-casting material high heat conduction aluminium alloy, two
Kind method, one kind are to add in alloying element to strengthen matrix by solution strengthening, and another kind is by adding in second-phase strength phase
Form aluminum matrix composite.Ca and Re adds in aluminium alloy the casting character that can greatly improve aluminium alloy as alloy element
And heat transfer property.With the rapid industrial development in our country, exploitation die casting novel aluminum alloy has become inevitable.
But Ca belongs to active element, be easy to carry out violent reaction with oxygen or nitrogen under atmospheric environment and
Generate burning or explosion.During aluminum alloy smelting, the oxidizing fire of aluminium calcium melt, is usually adopted in traditional in order to prevent
With protective gas or flux protection melting.But the use of both methods all because its exist be difficult to avoid that the defects of due to by
To limitation.Such as it is also easy to produce toxic gas pollution environment and flux is caused to be mingled with and damages alloy property.And flux is mingled with appearance
Easily become the source of corrosion of product in use, accelerated material corrosion reduces the service life.In addition, villaumite in flux and
Villiaumite is volatile at high temperature to generate certain strong corrosive gases, destroys workshop, equipment and ecological environment.Currently advanced is fire-retardant
Method is the fire-retardant method of alloy, and mechanism is that specific alloying element is added during aluminium alloy smelting to influence alloy oxidation
Thermodynamical reaction and dynamic process, form dense oxidation film and nitride film with protective effect, reach and prevent alloy acute
Strong oxidation and the purpose of nitridation, and the tendency of oxidizing fire of the kalzium metal during following process substantially reduces, so as to
Improve the process safety of kalzium metal.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, provide one kind can under 700-800 degree atmospheric conditions into
The die casting of row melting contains Ca and Re aluminium alloys and its processing technology with high heat conduction.And it is finally produced in the alloy of this temperature range melting
Product not only have excellent die casting performance, and heat transfer property is also significantly larger than existing aluminium alloy.This method, which also has, to be produced into
This is low, the characteristics of convenient for large-scale production.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of die casting high heat conduction aluminium alloy containing Ca and Re.By weight percentage, the composition of alloy is：Ca: 0.6-
1.5wt.%,Re:1.6-3.2wt.%；In:3.0-4.5wt.%,Sc:0.8-1.5wt.%, Mn:0.4-0.8wt.%, Be:0.2-
0.5wt.%, surplus are aluminium.The kalzium metal is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing exists
1.0-3.0wt.% or so.
The preparation method of above-mentioned die casting high heat conduction aluminium alloy containing Ca and Re, includes the following steps：The original that will as above match
Material is added in the electric induction furnace of atmosphere protection, and using silicon carbide crucible；Sensing heating is molten to 700-800 degree formation alloy
Liquid, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is stood after ten minutes in the heat preservation of 700-800 degree
It is cast in the same level equipment of heat top and carries out semi-continuous casting into required side's ingot and billet, ingot casting moves down speed as 5-10m/
min.The ingot casting can prepare the kalzium metal 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 250 degree, 2.4 hours；Vacuum aging handles 180 degree, and 1.9 is small
When.
Compared with prior art, the present invention has the advantages that：
（1）Patent of the present invention is carried for the state bad currently used for the cold chamber die casting performance and heat transfer property of aluminium diecasting alloy
A kind of novel materialogy solution is supplied.The alloy has extremely excellent flame retardant property, can reach in 700-800 temperature
5 hours are stood without significantly burning under atmospheric environment in the range of degree.It is molten being stirred, blowing etc. to liquid alloy
In body processing procedure, after its skin covering of the surface is destroyed because being vigorously stirred, energy rapid regeneration successfully hinders the burning of alloy.It and should
Kalzium metal is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 3.0wt.% or so.
（2）The novel aluminium diecasting alloy of this patent design has good fluidity, and filling performance is favourable, shrinkage cavity formability
It is small, the advantages that molten metal is inspiratory small.With low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast,
Casting cavity is low with loose apparent product yield rate to wait technical barriers.Although existing aluminium diecasting alloy is easy to die casting, but right
For thin wall of the thickness less than 1mm, casting fluidity is insufficient.Common problem is that yields is low, appearance of surface
Quality defect, surface is susceptible to the casting flaws such as streamline trace, spot, loose, it is difficult to ensure that product surface is bright and clean smooth
Quality requirement, and very big surface dressing work load is brought, increase production cost.Die casting aluminium provided by the invention closes
Gold, not only significantly improves the die casting yield rate of aluminum products, but also successfully can be less than the ultrathin aluminium of 0.08mm by die casting thickness
Product.
（3）The product also has excellent mechanical property, and tensile strength can reach 500-620Mpa, and conventional cast is used
The tensile strength of aluminium alloy maintains below 320Mpa.At room temperature, the heat transfer coefficient of the material is 120-140W/mK.And
The heat transfer coefficient of common aluminium diecasting alloy is generally less than 90W/mK in addition, the material is reduced than the density of traditional acieral
4-5% or so.
Specific embodiment
Embodiment 1
One kind is in 750 degree of melting die casting high heat conduction aluminium alloy containing Ca and Re.By weight percentage, the chemical composition of alloy
For：Ca: 0.9wt.%,Re:1.8wt.%；In:3.6wt.%,Sc:0.9wt.%, Mn:0.5wt.%, Be:0.3wt.%, surplus are
Aluminium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and uses silicon carbide earthenware
Crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect to 750 degree；By aluminium alloy
Body 750 degree of heat preservations stand be cast to after ten minutes in the same level equipment of heat top carry out semi-continuous casting into required side's ingot and
Billet, ingot casting move down speed as 6m/min.The ingot casting can be prepared as cast raw material for the compression casting of subsequent handling
The kalzium metal casting of complicated shape；The last heat treatment procedure of these casting is：Vacuum solid solution handles 250 degree, 2.4 hours；
Vacuum aging processing 180 degree, 1.9 hours.
The novel aluminium diecasting alloy of this patent design has good fluidity, and filling performance is favourable, shrinkage cavity formability is small,
The advantages that molten metal is inspiratory small.With low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, casting
Empty and loose apparent product yield rate is low to wait technical barriers.Although existing aluminium diecasting alloy is easy to die casting, but for thickness
For thin wall of the degree less than 1mm, casting fluidity is insufficient.Common problem is that yields is low, presentation quality of surface
Not good enough, surface is susceptible to the casting flaws such as streamline trace, spot, loose, it is difficult to ensure that the bright and clean smooth quality of product surface
It is required that and bring very big surface dressing work load, increase production cost.Pack alloy provided by the invention, no
It only significantly improves the die casting yield rate of aluminum products, and successfully can be less than the ultrathin aluminum products of 0.08mm by die casting thickness.
The product also has excellent mechanical property, and tensile strength can reach 594Mpa, and the tension of conventional cast aluminium alloy is strong
Degree maintains below 320Mpa.At room temperature, the heat transfer coefficient of the material is 128W/mK.And common aluminium diecasting alloy
Heat transfer coefficient is generally less than 90W/mK in addition, the material reduces by 4.2% or so than the density of traditional acieral.And the aluminium calcium
Alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 1.6wt.% or so.
Embodiment 2
One kind is in 770 degree of melting die casting high heat conduction aluminium alloy containing Ca and Re.By weight percentage, the chemical composition of alloy
For：Ca: 1.0wt.%,Re:2.5wt.%；In:3.6wt.%,Sc:0.9wt.%, Mn:0.5wt.%, Be:0.3wt.%, surplus are
Aluminium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and uses silicon carbide earthenware
Crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect to 770 degree；By aluminium alloy
Body 770 degree of heat preservations stand be cast to after ten minutes in the same level equipment of heat top carry out semi-continuous casting into required side's ingot and
Billet, ingot casting move down speed as 8m/min.The ingot casting can be prepared as cast raw material for the compression casting of subsequent handling
The kalzium metal casting of complicated shape；The last heat treatment procedure of these casting is：Vacuum solid solution handles 250 degree, 2.4 hours；
Vacuum aging processing 180 degree, 1.9 hours.
The novel aluminium diecasting alloy of this patent design has good fluidity, and filling performance is favourable, shrinkage cavity formability is small,
The advantages that molten metal is inspiratory small.With low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, casting
Empty and loose apparent product yield rate is low to wait technical barriers.Although existing aluminium diecasting alloy is easy to die casting, but for thickness
For thin wall of the degree less than 1mm, casting fluidity is insufficient.Common problem is that yields is low, presentation quality of surface
Not good enough, surface is susceptible to the casting flaws such as streamline trace, spot, loose, it is difficult to ensure that the bright and clean smooth quality of product surface
It is required that and bring very big surface dressing work load, increase production cost.Pack alloy provided by the invention, no
It only significantly improves the die casting yield rate of aluminum products, and successfully can be less than the ultrathin aluminum products of 0.08mm by die casting thickness.
The product also has excellent mechanical property, and tensile strength can reach 594Mpa, and the tension of conventional cast aluminium alloy is strong
Degree maintains below 320Mpa.At room temperature, the heat transfer coefficient of the material is 135W/mK.And common aluminium diecasting alloy
Heat transfer coefficient is generally less than 90W/mK in addition, the material reduces by 4.8% or so than the density of traditional acieral.And the aluminium calcium
Alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 1.3wt.% or so.
Embodiment 3
One kind is in 790 degree of melting die casting high heat conduction aluminium alloy containing Ca and Re.By weight percentage, the chemical composition of alloy
For：Ca: 1.2wt.%,Re:2.6wt.%；In:3.8wt.%,Sc:1.2wt.%, Mn:0.6wt.%, Be:0.3wt.%, surplus are
Aluminium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and uses silicon carbide earthenware
Crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect to 790 degree；By aluminium alloy
Body 790 degree of heat preservations stand be cast to after ten minutes in the same level equipment of heat top carry out semi-continuous casting into required side's ingot and
Billet, ingot casting move down speed as 8m/min.The ingot casting can be prepared as cast raw material for the compression casting of subsequent handling
The kalzium metal casting of complicated shape；The last heat treatment procedure of these casting is：Vacuum solid solution handles 250 degree, 2.4 hours；
Vacuum aging processing 180 degree, 1.9 hours.
The novel aluminium diecasting alloy of this patent design has good fluidity, and filling performance is favourable, shrinkage cavity formability is small,
The advantages that molten metal is inspiratory small.With low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, casting
Empty and loose apparent product yield rate is low to wait technical barriers.Although existing aluminium diecasting alloy is easy to die casting, but for thickness
For thin wall of the degree less than 1mm, casting fluidity is insufficient.Common problem is that yields is low, presentation quality of surface
Not good enough, surface is susceptible to the casting flaws such as streamline trace, spot, loose, it is difficult to ensure that the bright and clean smooth quality of product surface
It is required that and bring very big surface dressing work load, increase production cost.Pack alloy provided by the invention, no
It only significantly improves the die casting yield rate of aluminum products, and successfully can be less than the ultrathin aluminum products of 0.08mm by die casting thickness.
The product also has excellent mechanical property, and tensile strength can reach 608Mpa, and the tension of conventional cast aluminium alloy is strong
Degree maintains below 320Mpa.At room temperature, the heat transfer coefficient of the material is 138W/mK.And common aluminium diecasting alloy
Heat transfer coefficient is generally less than 90W/mK in addition, the material reduces by 4.2% or so than the density of traditional acieral.And the aluminium calcium
Alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 2.6wt.% or so.
Claims (3)
1. a kind of die casting high heat conduction aluminium alloy containing Ca and Re；According to weight percent, the ingredient of the alloy is：Ca: 0.6-
1.5wt.%,Re:1.6-3.2wt.%；In:3.0-4.5wt.%,Sc:0.8-1.5wt.%, Mn:0.4-0.8wt.%, Be:0.2-
0.5wt.%, surplus are aluminium.
2. die casting high heat conduction aluminium alloy containing Ca and Re according to claim 1, it is characterised in that include the following steps：It will be as
The raw material of upper proportioning is added in the electric induction furnace of atmosphere protection, and using silicon carbide crucible；Sensing heating is to 700-800 degree shapes
It is sufficiently stirred 10 minutes or so into alloy solution, and using electromagnetic agitation effect；Alloy liquid in 700-800 degree is kept the temperature and is stood
It is cast to after ten minutes in the same level equipment of heat top and carries out semi-continuous casting into required billet, ingot casting moves down speed as 5-
10m/min。
3. die casting high heat conduction aluminium alloy containing Ca and Re according to claim 1, it is characterised in that include following procedure of processing：
The ingot casting can prepare the kalzium metal casting of complicated shape as cast raw material for the compression casting of subsequent handling；These
The last heat treatment procedure of casting is：Vacuum solid solution handles 250 degree, 2.4 hours；Vacuum aging processing 180 degree, 1.9 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810220006.8A CN108251709A (en) | 2018-03-16 | 2018-03-16 | Die casting contains Ca and Re aluminium alloys and its processing technology with high heat conduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810220006.8A CN108251709A (en) | 2018-03-16 | 2018-03-16 | Die casting contains Ca and Re aluminium alloys and its processing technology with high heat conduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108251709A true CN108251709A (en) | 2018-07-06 |
Family
ID=62747101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810220006.8A Withdrawn CN108251709A (en) | 2018-03-16 | 2018-03-16 | Die casting contains Ca and Re aluminium alloys and its processing technology with high heat conduction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108251709A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111500883A (en) * | 2020-04-24 | 2020-08-07 | 福建省南平铝业股份有限公司 | Method for reducing oxidation inclusion degree in aluminum alloy casting |
-
2018
- 2018-03-16 CN CN201810220006.8A patent/CN108251709A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111500883A (en) * | 2020-04-24 | 2020-08-07 | 福建省南平铝业股份有限公司 | Method for reducing oxidation inclusion degree in aluminum alloy casting |
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Application publication date: 20180706 |
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