CN110144501A - A kind of long-acting rotten silumin and its modification process - Google Patents
A kind of long-acting rotten silumin and its modification process Download PDFInfo
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- CN110144501A CN110144501A CN201910403025.9A CN201910403025A CN110144501A CN 110144501 A CN110144501 A CN 110144501A CN 201910403025 A CN201910403025 A CN 201910403025A CN 110144501 A CN110144501 A CN 110144501A
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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
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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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
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
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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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
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Abstract
The invention discloses a kind of long-acting rotten silumins and its modification process, the silumin includes following component by weight percentage, 13.5~15.5wt.%Si, 0.55~0.65 wt.%Mg, 4.0~5.0 wt.%Cu, the wt.% of Mn≤0.5, the wt.% of Zn≤1.0wt.%, Fe≤1.3wt.%, Ni≤0.5, Sn≤0.3 wt.%, surplus Al.The modification process includes the following steps: the shove charge melting that feeds intake, and once adds alterant, secondary addition alterant, smelting furnace degasification, refinement.It can get modifying-refining by this Modification Manners to work well, and go bad effective time up to 50 hours or more silumins in liquid, the product for removing secondary smelting, energy saving from can be provided for client.
Description
Technical field
The invention belongs to technical field of alloy material, more particularly to a kind of long-acting rotten silumin and its rotten place
Reason method.
Background technique
With the continuous development of aluminium alloy technology, the field of aluminum alloy materials application is increasingly extensive, different technologies field pair
The demand type of extraordinary aluminum alloy materials is more and more.
The especially high-tech areas such as safety fittings, high-accuracy electromechanical equipment, space flight and aviation of automobile high-speed operating, to quality
Gently, the material demand haveing excellent performance such as corrosion-resistant, wear-resistant, antifatigue increasingly increases, and quality requirements also more become stringent.To want
Conventional aluminum alloy materials must be surmounted by asking the tissue, crystal grain, air-tightness of material itself.
The rotten use of extraordinary aluminium alloy alloy is more prevalent, and for the alloy modification of part aluminium silicon systems column, rotten has
Effect property is more demanding, if cannot timely cast after melting, is merely able to first store in the form of aluminium ingot and transport, to guarantee its change
Matter effect.Secondary smelting is also wanted when in use, is wasted time very much and the energy, and the fundamental policy of national energy conservation and emission reduction is not met.
Liquid aluminium alloy element has been at active state, and rotten validity period is very short.Therefore, how to provide one kind can be in liquid
The aluminium alloy solution for keeping rotten validity for a long time, the liquid aluminium alloy for removing secondary smelting, energy saving from is provided for client
Product is a urgent problem to be solved.
Summary of the invention
In view of this, the present invention provides it is a kind of liquid be able to maintain for a long time go bad validity silumin and
Its modification process.
The first aspect of the invention is discussed below: a kind of long-acting rotten silumin.
A kind of long-acting rotten silumin, includes following component by weight percentage: 13.5~15.5wt.%
Si, the Mg of 0.55~0.65 wt.%, the Cu of 4.0~5.0 wt.%, Mn≤0.5 wt.%, Zn≤1.0wt.%, Fe≤
The wt.% of wt.%, Sn≤0.3 of 1.3wt.%, Ni≤0.5, surplus are that this silumin of Al. proportion has heat-conductive characteristic good,
Thermal expansion coefficient is low, satisfactory mechanical property, is easy to accurate machining, the long advantage of liquid deteriorating time.
The second aspect of the invention, a kind of modification process of long-acting rotten silumin is discussed below.
The following steps are included:
1) feed intake shove charge melting: by raw material aluminium alloy needed for the melting silumin, aluminium ingot, aluminium silicon ratio by weight is put into
In smelting furnace, molten aluminum in smelting furnace is heated to 810 DEG C~830 DEG C and is kept the temperature, adjusts aluminium according to each element content required by product
Liquid ingredient stirs 20~30min；
2) once add alterant: the additional amount of alterant be 1-2kg/ ton aluminium, stir 20min~30min, standing 20~
30min；
3) secondary addition alterant: the additional amount of alterant be 2~4kg/ ton aluminium, stir 10~20min, again standing 20~
30min carries out the correction of copper and magnesium, and each element ingredient reaches requirement, and heat preservation stands 30~40min, and it is molten to form silumin
Liquid；
4) degasification smelting furnace degasification: is carried out to above-mentioned silumin solution；
5) refine: when temperature of aluminum liquid is 780 DEG C~800 DEG C, electromagnetic agitation, the phosphor-copper for putting into 1kg/ tons of aluminium while stirring is closed
Gold；Then artificial stirring 2min, electromagnetic agitation 5min, heat preservation stand 20min to get silumin solution.
Further, in the step 1 of the modification process of the long-acting rotten silumin of above-mentioned one kind, the raw material aluminium is closed
Gold is B390 aluminium alloy, and the molten aluminum holding temperature is 820 DEG C, and the mixing time is 25min.B390 aluminium alloy is in the market
The cast aluminium alloy gold of mass production, reasonable price are easily obtained.High melt and molten aluminum, which is sufficiently stirred, can enable silicon abundant
Dissolution, and is evenly distributed in molten aluminum, avoids the segregation of silicon, reduces the aggregation of silicon, so as to improve primary silicon and Eutectic Silicon in Al-Si Cast Alloys
Form, size and distribution.
Further, in the step 2 of the modification process of the long-acting rotten silumin of above-mentioned one kind, the alterant
Additional amount is 1.5kg/ tons of aluminium, and the mixing time is 25min, and the time of repose is 25min.Phosphor-copper alterant is in aluminium alloy
AlP fine crystal nuclear species is formed in liquid, the effect for refining crystal grain is fine, effectively continues deteriorating time and also grows.
Further, in the step 3 of the modification process of the long-acting rotten silumin of above-mentioned one kind, the alterant
Additional amount is 3kg/ tons of aluminium, and mixing time 15min, time of repose 25min, keeps the temperature time of repose 35min again.Because phosphor-copper becomes
The deterroration of matter agent is high, and air-breathing is nervous, rotten abundant in order to guarantee, therefore is added in two times.
Further, in the step 4 of the modification process of the long-acting rotten silumin of above-mentioned one kind, the smelting furnace degasification
Method are as follows: nitrogen blowing degassing processing is carried out to silumin solution, the nitrogen flow is 2m2/ h, nitrogen pressure are
0.30Mpa, degasification time 10min.Hydrogen-free bubble is obtained by being blown into inert gas into aluminium alloy solution, then utilizes these
Minute bubbles adsorbed hydrogen and oxide inclusion in floating-upward process, and be entrained to diecasting alloys liquid level and realize degasification and remove slag.
Further, in the step of modification process of the long-acting rotten silumin of above-mentioned one kind (5), the molten aluminum temperature
Degree is 790 DEG C.Suitable refining temperature can save fuel and working hour, while thinning effect is excellent.
Further, the modification process of the long-acting rotten silumin of above-mentioned one kind, the alterant are that phosphorus content is
8%~10% phosphor copper.The phosphor-copper market supply of this content is abundant, at low cost, excellent effect, is suitable for industrialized production.
Further, the modification process of the long-acting rotten silumin of above-mentioned one kind, the smelting furnace are electric furnace.Using use
Electro-smelting aluminium alloy, operating procedure is simple, and melting efficiency is high, and power savings are good, and stove ambient temperature is low, flue dust is few, operation
Environment is good, responds national energy conservation and emission reduction policy.
Further, the modification process of the long-acting rotten silumin of above-mentioned one kind, the casting of subsequent aluminium alloy ingots
Method the following steps are included:
(1) it puts soup: opening fire door, be slowly lifted electric furnace, molten aluminum is made at the uniform velocity to flow into chute；
(2) online degasification: molten aluminum is made to flow through getter, getter is passed through argon gas into molten aluminum by graphite rotator, according to molten aluminum
The difference of pressure between middle hydrogen and argon gas removes the hydrogen in molten aluminum；
(3) it filters: molten aluminum being made successively to pass through the foamed ceramic filter plate of 40ppi and 60ppi, filter the impurity in molten aluminum；
(4) cast: by above-mentioned silumin solution left standstill 30min, controlling cast temperature is 690 DEG C~720 DEG C, will be above-mentioned
Molten aluminum is cast in the mold preheated by 260~280 DEG C, and after the completion of casting, mold is cooled fast to 110- with 3-6 DEG C/s
Demoulded after 130 DEG C, after natural cooling after the high-silicon alloy ingot.
By the tensile strength of silumin obtained by above-mentioned casting method, yield strength, elongation percentage is all met the requirements, machine
Tool is functional, is easy to accurate machining.
The invention has the benefit that
1. new material element proportion is fine, heat-conductive characteristic is good, and thermal expansion coefficient is low, satisfactory mechanical property, is easy to accurate machine and adds
Work.
2. Modification of New Material thinning effect is good, and liquid rotten effective time is long, reaches 50 hours or more.
3. process flow is simple and efficient, at low cost, energy-saving and emission-reduction.
Detailed description of the invention
Attached drawing 1, which is that silumin solution is rotten, neutralizes the rotten sampling analysis table completed before heat preservation；
The sampling analysis table that attached drawing 2 is 1-6 hours after silumin solution is rotten；
The sampling analysis table that attached drawing 3 is 10.5-18 hours after silumin solution is rotten；
The sampling analysis table that attached drawing 4 is 24-40.5 hours after silumin solution is rotten；
The sampling analysis table that attached drawing 5 is 45-52.5 hours after silumin solution is rotten.
Specific embodiment
Below will be by several specific embodiments, the present invention is furture elucidated, these embodiments simply to illustrate that problem,
It is not a kind of limitation.
Embodiment 1
A kind of long-acting rotten silumin, includes following component by weight percentage: 13.5wt.%Si, 0.55wt.%
Mg, 4.0wt.%Cu, 0.2 wt.% Mn, 0.5wt.% Zn, 0.7wt.% Fe, 0.2 wt.% Ni, 0.1 wt.% Sn, surplus are
Al。
Embodiment 2
A kind of long-acting rotten silumin, includes following component by weight percentage: 14.5wt.%Si, 0.6wt.%
Mg, 4.5wt.%Cu, 0.35 wt.% Mn, 0.75wt.% Zn, 1.0wt.% Fe, 0.35 wt.% Ni, 0.2wt.% Sn, surplus
For Al.
Embodiment 3
A kind of long-acting rotten silumin, includes following component by weight percentage: 15.5wt.%Si, 0.65wt.%
Mg, 5.0wt.%Cu, 0.5 wt.% Mn, 1.0wt.% Zn, 1.3wt.% Fe, 0.5 wt.% Ni, 0.3wt.% Sn, surplus are
Al。
Embodiment 4
A kind of modification process of long-acting rotten silumin.
This technique is the following steps are included: by raw material aluminium alloy needed for silumin described in the melting embodiment of the present invention 1
B390, aluminium ingot, aluminium silicon ingot, by weight ratio put into electric furnace, molten aluminum in smelting furnace are heated to 810 DEG C and is kept the temperature, according to product
Required each element content adjusts molten aluminum ingredient, stirs 20min.It is closed by the phosphor-copper that the amount of 1.0kg/ tons of aluminium adds phosphorous 8%
Gold stirs 20min, stands 20min.Phosphorous 8% phosphor copper is then added by the amount of 2kg/ tons of aluminium, stirs 10min, again
20min is stood, while carry out the correction of copper and magnesium, each element ingredient reaches requirement, and heat preservation stands 30min, forms high silicon
Aluminium alloy solution.Nitrogen blowing degassing processing is carried out to above-mentioned silumin solution, the nitrogen flow is 2m3/ h, nitrogen pressure
Power is 0.30Mpa, degasification time 10min.When temperature of aluminum liquid is 780 DEG C, electromagnetic agitation puts into 1kg/ tons of aluminium while stirring
The phosphor copper of amount；Then artificial stirring 2min, electromagnetic agitation 5min, heat preservation stand 20min to get silumin solution.
Embodiment 5
A kind of modification process of long-acting rotten silumin.
This technique is the following steps are included: by raw material aluminium alloy needed for silumin described in the melting embodiment of the present invention 2
B390, aluminium ingot, aluminium silicon ingot, by weight ratio put into electric furnace, molten aluminum in smelting furnace are heated to 820 DEG C and is kept the temperature, according to product
Required each element content adjusts molten aluminum ingredient, stirs 25min.It is closed by the phosphor-copper that the amount of 1.5kg/ tons of aluminium adds phosphorous 9%
Gold stirs 25min, stands 25min.Phosphorous 9% phosphor copper is then added by the amount of 3kg/ tons of aluminium, stirs 15min, again
25min is stood, while carry out the correction of copper and magnesium, each element ingredient reaches requirement, and heat preservation stands 35min, forms high silicon
Aluminium alloy solution.Nitrogen blowing degassing processing is carried out to above-mentioned silumin solution, the nitrogen flow is 2m2/ h, nitrogen pressure
Power is 0.30Mpa, degasification time 10min.When temperature of aluminum liquid is 790 DEG C, electromagnetic agitation puts into 1kg/ tons of aluminium while stirring
Phosphor copper；Then artificial stirring 2min, electromagnetic agitation 5min, heat preservation stand 20min to get silumin solution.
Embodiment 6
A kind of modification process of long-acting rotten silumin.
This technique is the following steps are included: by raw material aluminium alloy needed for silumin described in the melting embodiment of the present invention 3
B390, aluminium ingot, aluminium silicon ingot, by weight ratio put into electric furnace, molten aluminum in smelting furnace are heated to 830 DEG C and is kept the temperature, according to product
Required each element content adjusts molten aluminum ingredient, stirs 30min.It is closed by the phosphor-copper that the amount of 2.0kg/ tons of aluminium adds phosphorous 10%
Gold stirs 30min, stands 30min.Phosphorous 9% phosphor copper is then added by the amount of 4.0kg/ tons of aluminium, stirs 20min, then
Secondary standing 30min, while carry out the correction of copper and magnesium, each element ingredient reaches requirement, and heat preservation stands 40min, is formed high
Silico-aluminum solution.Nitrogen blowing degassing processing is carried out to above-mentioned silumin solution, the nitrogen flow is 2m3/ h, nitrogen
Pressure is 0.30Mpa, degasification time 10min.When temperature of aluminum liquid is 800 DEG C, electromagnetic agitation puts into 1kg/ tons of aluminium while stirring
Phosphor copper；Then artificial stirring 2min, electromagnetic agitation 5min, heat preservation stand 20min to get silumin solution.
Embodiment 7
A kind of casting method of long-acting rotten silumin.
The silumin solution that embodiment 5 is obtained carries out the processing of following steps:
(1) it puts soup: opening fire door, be slowly lifted electric furnace, molten aluminum is made at the uniform velocity to flow into chute；
(2) online degasification: molten aluminum is made to flow through getter, getter is passed through argon gas into molten aluminum by graphite rotator, according to molten aluminum
The difference of pressure between middle hydrogen and argon gas removes the hydrogen in molten aluminum；
(3) it filters: molten aluminum being made successively to pass through the foamed ceramic filter plate of 40ppi and 60ppi, filter the impurity in molten aluminum；
(4) cast: by above-mentioned silumin solution left standstill 30min, controlling cast temperature is 690 DEG C DEG C, and above-mentioned molten aluminum is poured
It casts onto the mold preheated by 260 DEG C, after the completion of casting, is demoulded after mold is cooled fast to 110 DEG C with 3 DEG C/s, it is natural
The high-silicon alloy ingot is obtained after after cooling.
Gained aluminium alloy ingots is tested by pull-rod, tensile strength 210mp, yield strength 209mpa, elongation percentage 0.94, mechanics
Performance is met the requirements, satisfactory mechanical property, is easy to accurate machining.
Embodiment 8
A kind of casting method of long-acting rotten silumin.
The silumin solution that embodiment 5 is obtained carries out the processing of following steps:
(1) it puts soup: opening fire door, be slowly lifted electric furnace, molten aluminum is made at the uniform velocity to flow into chute；
(2) online degasification: molten aluminum is made to flow through getter, getter is passed through argon gas into molten aluminum by graphite rotator, according to molten aluminum
The difference of pressure between middle hydrogen and argon gas removes the hydrogen in molten aluminum；
(3) it filters: molten aluminum being made successively to pass through the foamed ceramic filter plate of 40ppi and 60ppi, filter the impurity in molten aluminum；
(4) cast: by above-mentioned silumin solution left standstill 30min, controlling cast temperature is 700 DEG C, and above-mentioned molten aluminum is cast
Into the mold by 270 DEG C of preheatings, after the completion of casting, demoulded after mold is cooled fast to 120 DEG C with 5 DEG C/s, it is naturally cold
But the high-silicon alloy ingot is obtained after after.
Gained aluminium alloy ingots is tested by pull-rod, tensile strength 212mp, yield strength 211mpa, elongation percentage 0.95, mechanics
Performance is met the requirements, satisfactory mechanical property, is easy to accurate machining.
Embodiment 9
A kind of casting method of long-acting rotten silumin.
The silumin solution that embodiment 5 is obtained carries out the processing of following steps:
(1) it puts soup: opening fire door, be slowly lifted electric furnace, molten aluminum is made at the uniform velocity to flow into chute；
(2) online degasification: molten aluminum is made to flow through getter, getter is passed through argon gas into molten aluminum by graphite rotator, according to molten aluminum
The difference of pressure between middle hydrogen and argon gas removes the hydrogen in molten aluminum；
(3) it filters: molten aluminum being made successively to pass through the foamed ceramic filter plate of 40ppi and 60ppi, filter the impurity in molten aluminum；
(4) cast: by above-mentioned silumin solution left standstill 30min, controlling cast temperature is 720 DEG C, and above-mentioned molten aluminum is cast
Into the mold by 280 DEG C of preheatings, after the completion of casting, demoulded after mold is cooled fast to 130 DEG C with 6 DEG C/s, it is naturally cold
But the high-silicon alloy ingot is obtained after after.
Gained aluminium alloy ingots is tested by pull-rod, tensile strength 211mp, yield strength 210mpa, elongation percentage 0.945, power
It learns performance to meet the requirements, satisfactory mechanical property is easy to accurate machining.
Embodiment 10
Embodiment 5 is a kind of embodiment of optimum condition of the invention, and the present embodiment is molten with the silumin that embodiment 5 obtains
0-50 hours sample detections are carried out for liquid.
The silumin solution that above-described embodiment 5 obtains is transferred to crucible, is kept the temperature at 730 DEG C~770 DEG C, every 1.5
Hour is sampled, and samples 36 times altogether, samples aluminium ingot and mushroom sample, analysis ingredient, judges aluminium ingot section deterioration, and record
Temperature when sampling.As a result as shown in Figs. 1-5, wherein Fig. 1 completes to keep the temperature for the rotten neutralization of above-mentioned silumin solution is rotten
Preceding sampling analysis table, data and pattern in table show it is rotten neutralize it is rotten complete heat preservation before, modification effect is lasting, gained aluminium
Ingot section metamorphic rank is 1 grade.Fig. 2 is the rotten latter 1-6 hours sampling analysis tables of above-mentioned silumin solution, the number in table
After showing rotten 1-6 hour with pattern, modification effect is lasting, and gained aluminium ingot section metamorphic rank is 1 grade.Fig. 3 is above-mentioned height
Rotten 10.5-18 hour sampling analysis tables of silico-aluminum solution, data and pattern in table show and go bad 10.5-18 hours
Afterwards, modification effect is lasting, and gained aluminium ingot section metamorphic rank is 1 grade.Fig. 4 is the rotten 24-40.5 of above-mentioned silumin solution
Hour sampling analysis table, data and pattern in table shows go bad 24-40.5 hours after, modification effect is lasting, gained aluminium ingot
Section metamorphic rank is 1 grade.Fig. 5 is rotten 45-52.5 hours sampling analysis tables of above-mentioned silumin solution, the number in table
After showing rotten 45-52.5 hour with pattern, modification effect is lasting, and gained aluminium ingot section metamorphic rank is 1 grade.
The experimental results showed that, this modification process modifying-refining works well above, and rotten effective time is long, and it is small to reach 50
When more than.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as of the invention
Protection.
Claims (10)
1. a kind of long-acting rotten silumin, which is characterized in that include following component by weight percentage: 13.5~
15.5wt.%Si, 0.55~0.65wt.%Mg, 4.0~5.0 wt.%Cu, Mn≤0.5wt.%, Zn≤1.0wt.%, Fe≤
1.3wt.%, Ni≤0.5 wt.%, Sn≤0.3wt.%, surplus Al.
2. the modification process of the long-acting rotten silumin of one kind according to claim 1, which is characterized in that including with
Lower step:
(1) feed intake shove charge melting: raw material aluminium alloy needed for the melting silumin, aluminium ingot, aluminium silicon ratio by weight are thrown
Enter in smelting furnace, the molten aluminum in smelting furnace is heated to 810 DEG C~830 DEG C and keeps the temperature, according to each element content tune required by product
Whole molten aluminum ingredient stirs 20~30min；
(2) it adds alterant: alterant being added for the first time, additional amount is 1-2kg/ tons of aluminium, stirs 20min~30min, stands 20
~30min；
(3) secondary addition alterant: second of addition alterant, additional amount are 2~4kg/ tons of aluminium, stir 10~20min, again
20~30min is stood, the correction of copper and magnesium is carried out, each element ingredient is made to reach requirement, heat preservation stands 30~40min；
(4) degasification smelting furnace degasification: is carried out to above-mentioned silumin solution with getter；
(5) refine: when temperature of aluminum liquid is 780 DEG C~800 DEG C, electromagnetic agitation puts into the alterant of 1kg/ tons of aluminium while stirring；
Then artificial stirring 2min, electromagnetic agitation 5min, heat preservation stand 20min to get silumin solution.
3. the modification process of the long-acting rotten silumin of one kind according to claim 2, which is characterized in that step
(1) in, the raw material aluminium alloy is B390 aluminium alloy, and the molten aluminum holding temperature is 820 DEG C, and the mixing time is
25min。
4. the modification process of the long-acting rotten silumin of one kind according to claim 3, which is characterized in that step
(2) in, the additional amount of the alterant is 1.5kg/ tons of aluminium, and the mixing time is 25min, and the time of repose is 25min.
5. the modification process of the long-acting rotten silumin of one kind according to claim 3, which is characterized in that step
(3) in, the alterant additional amount is 3kg/ tons of aluminium, and mixing time 15min, time of repose 25min, keeps the temperature time of repose again
35min。
6. the modification process of the long-acting rotten silumin of one kind according to claim 3, which is characterized in that step
(4) in, the method for the smelting furnace degasification are as follows: nitrogen blowing degassing processing is carried out to silumin solution, the nitrogen flow is
2m3/ h, nitrogen pressure 0.30Mpa, degasification time 10min.
7. the modification process of the long-acting rotten silumin of one kind according to claim 3, which is characterized in that step
(5) in, the temperature of aluminum liquid is 790 DEG C.
8. according to the modification process of the long-acting rotten silumin of one kind described in claim 2-7, which is characterized in that described
Alterant is phosphor copper, and the phosphorus content of the phosphor copper is 8%~10%.
9. the modification process of the long-acting rotten silumin of one kind according to claim 8, which is characterized in that described molten
Furnace is electric furnace.
10. the silumin ingot of the modification process of the long-acting rotten silumin of one kind according to claim 9
Casting method, which is characterized in that further comprising the steps of after Metamorphism treatment:
(1) it puts soup: opening fire door, be slowly lifted electric furnace, silumin solution is made at the uniform velocity to flow into chute；
(2) online degasification: molten aluminum is made to flow through getter, getter is passed through argon gas into molten aluminum by graphite rotator, according to molten aluminum
The difference of pressure between middle hydrogen and argon gas removes the hydrogen in molten aluminum；
(3) it filters: molten aluminum being made successively to pass through the foamed ceramic filter plate of 40ppi and 60ppi, filter the impurity in molten aluminum；
(4) cast: by above-mentioned silumin solution left standstill 30min, controlling cast temperature is 690 DEG C~720 DEG C, will be above-mentioned
Molten aluminum is cast in the mold preheated by 260~280 DEG C, and after the completion of casting, mold is cooled fast to 110- with 3-6 DEG C/s
It is demoulded after 130 DEG C, the silumin ingot is obtained after natural cooling.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115141959A (en) * | 2021-07-28 | 2022-10-04 | 中南大学 | High-wear-resistance high-strength and high-toughness aluminum-silicon alloy and preparation method thereof |
| CN116970831A (en) * | 2023-09-13 | 2023-10-31 | 四川航天职业技术学院(四川航天高级技工学校) | Refining method of high-silicon aluminum alloy |
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| CN115141959A (en) * | 2021-07-28 | 2022-10-04 | 中南大学 | High-wear-resistance high-strength and high-toughness aluminum-silicon alloy and preparation method thereof |
| CN115141959B (en) * | 2021-07-28 | 2023-09-22 | 中南大学 | High-wear-resistance high-strength and high-toughness aluminum-silicon alloy and preparation method thereof |
| CN116970831A (en) * | 2023-09-13 | 2023-10-31 | 四川航天职业技术学院(四川航天高级技工学校) | Refining method of high-silicon aluminum alloy |
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