CN109161754A - Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment - Google Patents
Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment Download PDFInfo
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- CN109161754A CN109161754A CN201811283937.9A CN201811283937A CN109161754A CN 109161754 A CN109161754 A CN 109161754A CN 201811283937 A CN201811283937 A CN 201811283937A CN 109161754 A CN109161754 A CN 109161754A
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- magnesium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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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
Abstract
The invention discloses semi-solid state extrusion cast form part magnesium alloy and techniques under a kind of atmospheric environment.According to weight percent, the ingredient of the alloy are as follows: Sn:5.0-8.0wt.%, Sc:0.2-0.4wt.%, Bi:1.5-1.8wt.%, Ti:0.4-0.6wt.%, Te:0.1-0.2wt.%, In:2.0-2.5wt.%, Ru:0.2-0.5wt.%, Cd:1.5-2.0wt.%, surplus are magnesium.The material is that the fire-retardant of magnesium alloy provides a kind of different and tradition addition Ca, the materialogy solution of Be, Zn and rare earth element, and the alloy is other than with excellent casting character, moreover it is possible to which the mechanics for reaching conventional magnesium alloy is horizontal.Current existing antiflaming magnesium alloy mechanical property status ideal not to the utmost is overcome completely.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of magnesium alloy.
Background technique
Magnesium is a kind of metal very light, and specific gravity is about the 2/3 of aluminium, the 1/4 of iron.Other element groups are added by base of magnesium
At magnesium alloy, there is a series of excellent mechanical properties, physical property and chemical property, such as: density is small, and specific strength is high,
Elasticity modulus is big, and absorb shock resistance is good, absorbs impact that load-carrying ability is bigger than aluminium alloy, and the corrosive nature of resistance to organic matter and alkali is good.In addition,
Magnesium alloy is also equipped with electromagnetic shielding, machinability and processing cost is low, machining energy is only aluminium alloy 70% and well
The advantages that being easily recycled.Thus, magnesium alloy is known as 21 century green engineering material as most light engineering metal material.No
Only application field is extensive, has become one of the developing direction of the following new material.
Since 20th century, magnesium alloy is just applied in aerospace field.The Service Environment of Flight Vehicle Structure part is more
Add badly, does not require nothing more than construction material light weight, also require its comprehensive mechanical property with higher.Since magnesium alloy can be big
The big aerodynamics performance for improving aircraft and its substantially reduced construction weight of energy, many aerospace components are mostly by magnesium
Alloy production.In field of traffic, magnesium alloy by developed country be widely used in fascia, seat support, gear box casing,
On the components such as direction control system component, engine bonnet, car door, engine cylinder body, frame.Automobile zero is manufactured with magnesium alloy
Component can significantly mitigate car weight, reduce oil consumption, reduce exhaust emissions amount, improve the integrated level of components, improve Automobile Design
Flexibility etc..
In Material Field, has so big potentiality as magnesium alloy there are no any other material and wide answer
Use field.Magnesium is one of the most abundant light metal alloy of reserves, crustal abundance 2% on the earth.According to US Geological Survey
(USGS) data announced in 2015 are shown, the explored magnesite resource amount in the whole world is up to 12,000,000,000 tons, 2,400,000,000 tons of reserves.Contain
Country abundant includes: Russian (6.5 hundred million tons, account for total amount 27%)；Chinese (500,000,000 tons, account for total amount 21%)；South Korea's (4.5 hundred million tons).
As one of magnesium resource country the most abundant in the world, magnesium resource ore type is complete, widely distributed for China.In view of international competing
The status for increasingly fierce today and many metal resources tending to be exhausted is striven, accelerating exploitation magnesium alloy materials is that realization is sustainable
One of important measures of development.
However, although magnesium alloy have light weight, fusing point is low, be easy smelting processing the characteristics of, magnesium alloy chemical activity
The characteristics of make magnesium alloy be easy to happen burning when smelting and aoxidize.For a long time, the smelting of magnesium alloy can pass through
Inhibit contact of the Serum Magnesium with air using low melting point salt or the method for gas shield.And allow to obtaining magnesium alloy
While matallurgical products, the use of expensive argon gas is prevented, has reduced production cost.However, it is necessary to see: (1) in eutectic
In point molten-salt growth method, the fused salt (often alkali metal, alkaline-earth metal and its chloride and fluoride) of addition low melting point comes in crucible
Form the coating of magnesium alloy.Although this method is simple and easy, a large amount of gas (such as Cl excitatory can be generated2, HCl,
HF etc.) and pollute environment.Furthermore casting when flux addition will lead to magnesium alloy generation be mingled with, low-alloyed machinery drops
Performance and corrosion resistance.Moreover, flux is easy and this when adding rare earth element or other active elements in alloy
A little elements react and lead to the loss of these addition element.(2) gas protection method uses SF6, SO2And CO2, but it
The shortcomings that be obviously.SF first6It is CO to the ability that atmospheric warming effect warms223900 times, and need complexity
Transport and sealing device and transmission device.SO2Gas relies on and Serum Magnesium reaction generates fine and close MgS, MgO and MgSO4Film into
Isolation of the row to air, excessive SO2Acid rain can be formed to air born pollution unavoidably by escaping into air.Thus gas is protected
It defends the doctrine and challenge inevitably also is produced to environmental protection.
It is the method by alloying that state-of-the-art magnesium alloy, which smelts flame-retarded technology, at present, adds alloy member in the magnesium alloy
Element when melting can in air oxygen or nitrogen react generate one layer of fine and close protective film.Thus pressing down
While having made air and Serum Magnesium contact, the initiation temperature of magnesium alloy is improved, makes not generating burning when melting and casting.But
It is that, although these antiflaming magnesium alloys have excellent flame retardant property, such material is also in mechanical property and object so far
Rationality can on have many deficiencies, and therefore and seriously hinder the industrialization process and market occupancy volume of such material.Thus open
China's magnesium alloy production technology can also be pushed not only while solving industry problems significantly by sending out antiflaming magnesium alloy of new generation
It is promoted.
Summary of the invention
The purpose of the present invention is to overcome the deficiency in the prior art, provides semi-solid state extrusion cast form under a kind of atmospheric environment
Part magnesium alloy and technique.
To achieve the goals above, the present invention adopts the following technical scheme:
Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment.By weight percentage, the group of alloy
As Sn:5.0-8.0wt.%, Sc:0.2-0.4wt.%, Bi:1.5-1.8wt.%, Ti:0.4-0.6wt.%, Te:0.1-
0.2wt.%, In:2.0-2.5wt.%, Ru:0.2-0.5wt.%, Cd:1.5-2.0wt.%, surplus are magnesium.
Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of above-mentioned atmospheric environment, including following smelting step
(under protective atmosphere) and procedure of processing (under atmospheric environment): the raw material as above matched is added to the electric induction furnace of argon gas protection
It is interior, and use silicon carbide crucible；Induction heating forms alloy melt to 800 degree, and is sufficiently stirred 15 using electromagnetic agitation effect
Minute or so；Alloy melt is cast in waterglass or graphite jig after 800 degree of heat preservations stand 15 minutes and is cast
Molding.The magnesium alloy that magnesium alloy ingot is heated to be formed in 460-520 degree in iron crucible semisolid under atmospheric environment melts
Slurry, and die casting machine is used to be injected into preheating smoothly as in the mold cavity of 150-250 degree；After the completion of casting, shaping dope is opened
Press is squeezed；The work pressure used is referred to as 2400KN, mold clamping force 1600KN, extrusion speed 25-30mm/s, forms ratio
Pressure is 90-105MPa, dwell time 10-15s, soaking time 15-20s.
Compared with prior art, the invention has the following beneficial effects:
(1) the fire-retardant problem of magnesium alloy is a problem of industry of great industrial value.Since magnesium alloy is too active,
It must be using the method for protection melting when melting.In addition, due to frictional heat generation or outer fire in as structural member use process
In the case where can also catch fire, be commonly called as magnesium fire.Although being promoted at present by adding Ca, Be, Zn and rare earth element in magnesium
The ignition temperature of magnesium alloy, that is, firing point, but inevitably there is the disadvantages of poor mechanical property in these alloys.This is specially
Benefit is exactly a kind of solution of the novel flame-retardant magnesium alloy proposed to solve these problems.Pass through advanced design of material
Technology further promotes the mechanical property of magnesium alloy while guaranteeing alloy flame retardant property.
(2) fire retardancy of alloy depends on the ability that skin covering of the surface hinders reactive material to pass through, that is, the cause of skin covering of the surface
Bulkfactor (volume of oxide/consumption metal volume).For aluminium alloy, the compacting factor of skin covering of the surface is 1.28, because
And aluminium alloy the problem of not burning in melting.But for magnesium alloy, the consistency coefficient for forming magnesia is
0.79, thus the magnesium oxide films are loose.And since the heating conduction of the film and magnesium alloy fused mass is poor, surface oxidation generates heat cannot
Export in time, causes bath surface temperature to steeply rise, and accelerates the progress of burning, or even generate explosion.Present patent application is protected
Original loose magnesium oxide films are changed into fine and close complex oxide, nitrogen by advanced design of material by the antiflaming magnesium alloy of shield
The dense film of compound and their compounds, consistency coefficient are 1.25-1.30.Due to can effectively spread over magnesium alloy
Bath surface plays and inhibits air and melt contacts, achieved the purpose that fire-retardant.Even if, should under the conditions of intensively stirred
Magnesium alloy fused mass surface moment generates new smooth surface film, and liquid film surface is without combustion phenomena.Thus in the temperature of 460-520 degree
It spends in range, which can show excellent flame retardant property under the conditions of not outer plus protectant under semisolid.
In addition, the initiation temperature of the alloy is 750-800 degree, the specific ingredient depending on alloy.
(new technology of 3 Semi-solid Process as field of material processing is a kind of newly net forming technology.It directly will be partly solid
State alloy casting, shortens processing flow.Using with flame retardant property and the alloy can have excellent die casting under semisolid
The magnesium alloy of forming ability can not only reduce the high disadvantage of traditional magnesium alloy processing cost, can also expand the more industry necks of magnesium alloy
Domain is widely used.The antiflaming magnesium alloy can overcome conventional cast under the specific processing conditions of this patent institute completely
The technical issues of often occurring in semi-solid forming with AZ80 magnesium alloy, including Surface Wrinkle in iron (Mg alloy castings concave-convex surface
It is uneven), cold shut (molten metal and oxidation film separate and unmelted be combined), (gas contained in magnesium alloy fused mass is being cast stomata
Middle precipitation pore-forming), it is loose (due to cast(ing) surface and the asynchronous solid-liquid volume differences of solidified inside not caused by), be mingled with that (traditional magnesium closes
Golden melt viscosity coefficient is big and causes oxide cannot the emersion from melt in time).In mold preheating temperature 150-250 degree, at
Type, which compares, presses 90-105MPa, under the Die Casting Condition of dwell time 10-15s, can overcome completely traditional magnesium alloy in press casting procedure
The above-mentioned technical problem occurred.While improving product qualification rate, but also cast temperature and Die Casting Condition have significantly
Simplify.Production cost can be not only reduced, but also such product has more competitive advantage on the market.
(4) solidification temperature range of the alloy is broad (460-520 degree), and alloy flowability is good.In process of setting,
Solid-liquid two-phase state can be kept in sizable temperature range.It, can after mold temperature is heated within the scope of 150-250 degree
Die casting is effectively performed.Gained casting not only distributed components, and the flame retardant property that is shown in press casting procedure nor
It is often prominent.The dense oxidation film of cast(ing) surface is very thin, the workload of demoulding and the maintenance of reduction surface after being conducive to die casting.The material
The mechanics that material has traditional magnesium alloy is horizontal: elasticity modulus 72-74GPa, yield strength 115-132MPa, tensile strength are
140-158MPa, elongation percentage 8-10%.And the fine and close protective film of the alloy surface can also play common magnesium alloy do not have it is resistance to
Corrosive power is typically maintained in 6-8 using product service life prepared by the material, and the service life of common magnesium alloy is only
Have 4 years or so.
Specific embodiment
Embodiment 1
Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment.By weight percentage, the group of alloy
As Sn:5.0wt.%, Sc:0.2wt.%, Bi:1.5wt.%, Ti:0.4wt.%, Te:0.1wt.%, In:2.0wt.%, Ru:
0.2wt.%, Cd:1.5wt.%, surplus are magnesium.Under a kind of above-mentioned atmospheric environment semi-solid state extrusion cast form part magnesium alloy and
Technique, including following smelting step (under protective atmosphere) and procedure of processing (under atmospheric environment): the raw material as above matched is added
In the electric induction furnace protected to argon gas, and use silicon carbide crucible；Induction heating forms alloy melt to 800 degree, and utilizes electricity
Magnetic agitation effects are sufficiently stirred 15 minutes or so；Alloy melt is cast to after 800 degree of heat preservations stand 15 minutes waterglass or
Casting and forming is carried out in person's graphite jig.Magnesium alloy ingot is heated in 460-520 degree in iron crucible under atmospheric environment
The magnesium alloy molten slurry of semisolid is formed, and die casting machine is used to be injected into preheating smoothly as in the mold cavity of 150-250 degree；It pours
After the completion of casting, opens forming hydraulic press and squeezed；The work pressure used is referred to as 2400KN, mold clamping force 1600KN, squeezes speed
Degree is 25-30mm/s, and molding is 90-105MPa, dwell time 10-15s, soaking time 15-20s than pressure.
Original loose magnesium oxide films are changed into fine and close oxidase complex by advanced design of material by the antiflaming magnesium alloy
Object, the dense film of nitride and their compounds, consistency coefficient are 1.28.Due to can effectively spread over magnesium alloy
Bath surface plays and inhibits air and melt contacts, achieved the purpose that fire-retardant.Even if, should under the conditions of intensively stirred
Magnesium alloy fused mass surface moment generates new smooth surface film, and liquid film surface is without combustion phenomena.The initiation temperature of the alloy is
760 degree, thus within the temperature range of 480-510 degree, which can add protectant outer under semisolid
Excellent flame retardant property is shown under part.The solidification temperature range of the alloy is broad (480-510 degree), and alloy flowability is good.
In process of setting, solid-liquid two-phase state can be kept in sizable temperature range, die casting can be effectively performed.The material
The mechanics that material has traditional magnesium alloy is horizontal, and the fine and close protective film of the alloy surface can also play what common magnesium alloy did not had
Corrosion resistance.
Embodiment 2
Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment.By weight percentage, the group of alloy
As Sn:8.0wt.%, Sc:0.4wt.%, Bi:1.8wt.%, Ti:0.6wt.%, Te:0.2wt.%, In:2.5wt.%, Ru:
0.5wt.%, Cd:2.0wt.%, surplus are magnesium.Under a kind of above-mentioned atmospheric environment semi-solid state extrusion cast form part magnesium alloy and
Technique, including following smelting step (under protective atmosphere) and procedure of processing (under atmospheric environment): the raw material as above matched is added
In the electric induction furnace protected to argon gas, and use silicon carbide crucible；Induction heating forms alloy melt to 800 degree, and utilizes electricity
Magnetic agitation effects are sufficiently stirred 15 minutes or so；Alloy melt is cast to after 800 degree of heat preservations stand 15 minutes waterglass or
Casting and forming is carried out in person's graphite jig.Magnesium alloy ingot is heated in 460-520 degree in iron crucible under atmospheric environment
The magnesium alloy molten slurry of semisolid is formed, and die casting machine is used to be injected into preheating smoothly as in the mold cavity of 150-250 degree；It pours
After the completion of casting, opens forming hydraulic press and squeezed；The work pressure used is referred to as 2400KN, mold clamping force 1600KN, squeezes speed
Degree is 25-30mm/s, and molding is 90-105MPa, dwell time 10-15s, soaking time 15-20s than pressure.
Original loose magnesium oxide films are changed into fine and close oxidase complex by advanced design of material by the antiflaming magnesium alloy
Object, the dense film of nitride and their compounds, consistency coefficient are 1.28.Due to can effectively spread over magnesium alloy
Bath surface plays and inhibits air and melt contacts, achieved the purpose that fire-retardant.Even if, should under the conditions of intensively stirred
Magnesium alloy fused mass surface moment generates new smooth surface film, and liquid film surface is without combustion phenomena.The initiation temperature of the alloy is
760 degree, thus within the temperature range of 470-510 degree, which can add protectant outer under semisolid
Excellent flame retardant property is shown under part.The solidification temperature range of the alloy is broad (470-510 degree), and alloy flowability is good.
In process of setting, solid-liquid two-phase state can be kept in sizable temperature range, die casting can be effectively performed.The material
The mechanics that material has traditional magnesium alloy is horizontal, and the fine and close protective film of the alloy surface can also play what common magnesium alloy did not had
Corrosion resistance.
Embodiment 3
Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment.By weight percentage, the group of alloy
As Sn:5.2wt.%, Sc:0.3wt.%, Bi:1.6wt.%, Ti:0.5wt.%, Te:0.1wt.%, In:2.4wt.%, Ru:
0.3wt.%, Cd:1.8wt.%, surplus are magnesium.Under a kind of above-mentioned atmospheric environment semi-solid state extrusion cast form part magnesium alloy and
Technique, including following smelting step (under protective atmosphere) and procedure of processing (under atmospheric environment): the raw material as above matched is added
In the electric induction furnace protected to argon gas, and use silicon carbide crucible；Induction heating forms alloy melt to 800 degree, and utilizes electricity
Magnetic agitation effects are sufficiently stirred 15 minutes or so；Alloy melt is cast to after 800 degree of heat preservations stand 15 minutes waterglass or
Casting and forming is carried out in person's graphite jig.Magnesium alloy ingot is heated in 460-520 degree in iron crucible under atmospheric environment
The magnesium alloy molten slurry of semisolid is formed, and die casting machine is used to be injected into preheating smoothly as in the mold cavity of 150-250 degree；It pours
After the completion of casting, opens forming hydraulic press and squeezed；The work pressure used is referred to as 2400KN, mold clamping force 1600KN, squeezes speed
Degree is 25-30mm/s, and molding is 90-105MPa, dwell time 10-15s, soaking time 15-20s than pressure.
Original loose magnesium oxide films are changed into fine and close oxidase complex by advanced design of material by the antiflaming magnesium alloy
Object, the dense film of nitride and their compounds, consistency coefficient are 1.29.Due to can effectively spread over magnesium alloy
Bath surface plays and inhibits air and melt contacts, achieved the purpose that fire-retardant.Even if, should under the conditions of intensively stirred
Magnesium alloy fused mass surface moment generates new smooth surface film, and liquid film surface is without combustion phenomena.The initiation temperature of the alloy is
790 degree, thus within the temperature range of 465-518 degree, which can add protectant outer under semisolid
Excellent flame retardant property is shown under part.The solidification temperature range of the alloy is broad (465-518 degree), and alloy flowability is good.
In process of setting, solid-liquid two-phase state can be kept in sizable temperature range, die casting can be effectively performed.The material
The mechanics that material has traditional magnesium alloy is horizontal, and the fine and close protective film of the alloy surface can also play what common magnesium alloy did not had
Corrosion resistance.
Claims (3)
1. semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment；According to weight percent, the alloy
Ingredient are as follows: Sn:5.0-8.0wt.%, Sc:0.2-0.4wt.%, Bi:1.5-1.8wt.%, Ti:0.4-0.6wt.%, Te:0.1-
0.2wt.%,In:2.0-
2.5wt.%, Ru:0.2-0.5wt.%, Cd:1.5-2.0wt.%, surplus are magnesium.
2. semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment according to claim 1, special
Sign is to include smelting step under following protective atmosphere: the raw material as above matched is added in the electric induction furnace of argon gas protection,
And use silicon carbide crucible；Induction heating forms alloy melt to 800 degree, and is sufficiently stirred 15 minutes using electromagnetic agitation effect
Left and right；Alloy melt is cast in waterglass or graphite jig after 800 degree of heat preservations stand 15 minutes and carries out casting and forming.
3. semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment according to claim 1, special
Sign is comprising procedure of processing under following atmospheric environment: magnesium alloy ingot being heated to 460- in iron crucible under atmospheric environment
The magnesium alloy molten slurry of semisolid is formed in 520 degree, and die casting machine is used to be injected into preheating smoothly as the mould type of 150-250 degree
It is intracavitary；After the completion of casting, opens forming hydraulic press and squeezed；The work pressure used is referred to as 2400KN, mold clamping force 1600KN,
Extrusion speed is 25-30mm/s, and molding is 90-105MPa, dwell time 10-15s, soaking time 15-20s than pressure.
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| CN201811283937.9A CN109161754A (en) | 2018-10-31 | 2018-10-31 | Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110157966A (en) * | 2019-05-09 | 2019-08-23 | 宁夏中太镁业科技有限公司 | A kind of magnesium alloy pot and its manufacturing method |
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| CN105132775A (en) * | 2015-09-10 | 2015-12-09 | 苏州莱特复合材料有限公司 | Light composite magnesium-based alloy material and preparation method thereof |
| CN107523724A (en) * | 2017-09-11 | 2017-12-29 | 广州宇智科技有限公司 | Magnesium lithium alloy and its processing technology with high thermal conductivity alpha+beta containing two-phase |
| CN108330364A (en) * | 2018-03-14 | 2018-07-27 | 广州宇智科技有限公司 | Have the die casting Mg-Ca-Ru magnesium alloys of resistance to oxidation feature |
| WO2018154124A1 (en) * | 2017-02-24 | 2018-08-30 | Innomaq 21, S.L. | Method for the economic manufacture of light components |
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| CN104001895A (en) * | 2014-05-21 | 2014-08-27 | 上海交通大学 | Semi-solid rheological squeeze casting forming method of flame retardant magnesium alloy |
| CN105132775A (en) * | 2015-09-10 | 2015-12-09 | 苏州莱特复合材料有限公司 | Light composite magnesium-based alloy material and preparation method thereof |
| WO2018154124A1 (en) * | 2017-02-24 | 2018-08-30 | Innomaq 21, S.L. | Method for the economic manufacture of light components |
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| CN108330364A (en) * | 2018-03-14 | 2018-07-27 | 广州宇智科技有限公司 | Have the die casting Mg-Ca-Ru magnesium alloys of resistance to oxidation feature |
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Application publication date: 20190108 |