CN109593994A - Add the method that Rare-Earth Ce element reduces aluminum matrix composite hot cracking tendency - Google Patents
Add the method that Rare-Earth Ce element reduces aluminum matrix composite hot cracking tendency Download PDFInfo
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- CN109593994A CN109593994A CN201910081857.3A CN201910081857A CN109593994A CN 109593994 A CN109593994 A CN 109593994A CN 201910081857 A CN201910081857 A CN 201910081857A CN 109593994 A CN109593994 A CN 109593994A
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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
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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
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
- C22C1/1052—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites by mixing and casting metal matrix composites with reaction
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of methods that addition Rare-Earth Ce element reduces aluminum matrix composite hot cracking tendency.Using ZL205A alloy as basis material, micro-nano particle TiB is prepared first with in-situ authigenic melt technology2Enhance ZL205A composite material, then to containing TiB2The Rare-Earth Ce element of addition 0.2% in the Composite Melt of particle, to reduce the hot cracking tendency of aluminum matrix composite.The present invention can reduce 5TiB in the case where not reducing its intensity and toughness2The hot cracking tendency of/ZL205A composite material, has refined the crystal grain of the series composite materials, improves the performance of its material, improves the service life of material.
Description
Technical field
The present invention relates to high-intensitive, toughness aluminum matrix composite hot cracking tendency research fields, and in particular to a kind of addition
The method of Rare-Earth Ce element reduction aluminum matrix composite hot cracking tendency.
Background technique
Aluminum matrix composite has high-intensitive, high tenacity, the excellent performances such as corrosion resistance.Because of aluminum matrix composite density
Lower, so light weight, intensity is high, is suitble to do stress members.Therefore it is widely used in space flight, automobile, ship at this stage
Equal fields, such as fuselage of big aircraft, undercarriage etc. are useful for the aluminum matrix composite of ZL205A series.But in the material
In the forming process of material, in casting and welding process, when material solidification, the defects of being easy to produce hot tearing, segregation, stomata.
Wherein hot cracking tendency influences the performance of material very big, reduces the service life of material, results even in material failure sometimes
It must to cause very huge economic loss and people's property loss, therefore study the hot cracking tendency for how reducing material to have very much
It wants.
Summary of the invention
Incline to solve the above problems, reducing aluminum matrix composite hot tearing the present invention provides a kind of addition Rare-Earth Ce element
The method of tropism, this method can improve the intensity and toughness of material with refiner material crystal grain.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A method of addition Rare-Earth Ce element reduces aluminum matrix composite hot cracking tendency, comprising the following specific steps
S1,5TiB is prepared using in-situ authigenic melt technology2/ ZL205A composite material；
S11, the 5% of ZL205A alloy mass is calculated first as TiB2The quality of particle calculates potassium fluoborate according to this equation
With the respective quality of potassium fluotitanate and fine aluminium, potassium fluoborate and potassium fluotitanate powder are uniformly mixed, are then placed in 250 DEG C of guarantor
Two hours are kept the temperature in warm furnace, then it is bundled into several parcels with aluminium-foil paper；
6KBF4+3K2TiF6+ 10Al=9KAlF4+K3AlF6+3TiB2
S12, the crucible that preparatory load weighted ZL205A alloy is put into preheating insulation in the holding furnace for be previously placed in 300 DEG C or so
Interior melting, after alloy is completely melt, temperature maintains 850 DEG C, and the potassium fluoborate (KBF for using In Aluminium Foil Packing is added4) and fluorine titanium
Sour potassium (K2TiF6), it is pressed into alloy melt, is not stirred with bell jar, keep the temperature 1 hour.
S13, when metal bath temperature is down to 750 DEG C, remove metal bath the surface residual salt and slag that have reacted, specifically
Method, residual salt and slag are removed using tipping, crucible is tilted into just metal bath first and is not flowed out, at this time surface
A part of residual salt be poured out, go out remaining residual salt and slag along the outside wooden dipper of four wall of crucible with iron spoon later；
Deslagging agent is added, metal bath is refined, specific method, slagging-off is added for carbon trichloride in the deslagging agent used
The amount of agent is the 10% of potassium fluoborate and potassium fluotitanate gross mass, is added in two portions, 5% is added every time, and stirs 30 ~ 60 every time
Second, 10 ~ 20 minutes then are kept the temperature at 750 DEG C, is finally removed the gred, according to said method twice to metal bath refining；
S2, quality is accounted for containing TiB20.2% Rare-Earth Ce element of the composite material quality of particle and according to total chemical reaction side
Formula calculates and load weighted fine aluminium is added in metal bath together, and in-furnace temperature is increased to 800 DEG C of heat preservations, 30 minutes left sides
It is right；It after Rare-Earth Ce fusing, need to be stirred with graphite rod, stir 1 ~ 2 time, metal bath 30 ~ 60 seconds need to be stirred every time, mixing time
Between be divided into 10 ~ 20 minutes, then keep the temperature 30 minutes at 750 DEG C；It comes out of the stove when metal bath temperature drops to 740 DEG C, stirs again
After mixing 10 ~ 30 seconds, removes surface slag and oxide skin is adopted when metal bath temperature is dropped to greater than 10 DEG C of cast temperature or so
With being poured in the mold of preheating insulation in the holding furnace for being previously placed in 250 DEG C.
Further, in the step S12, the temperature of melting is 850 DEG C, and wherein the ZL205A alloy of melting need to meet state
Family's standard.
The invention has the following advantages:
(1) 5TiB can be effectively reduced2The hot cracking tendency of/ZL205A composite material, has refined the crystalline substance of the series composite materials
Grain, improves the performance of its material；
(2) composite material prepared with this method, crystal grain become tiny, are mingled with less, stomata reduction；
(3) this method is easy to operate, and ingredient is easy, can practicality it is stronger；
(4) preparation cost of composite material can be reduced；
(5) service life of material can be improved.
Detailed description of the invention
Fig. 1 is addition 5TiB2The SEM microstructure picture of/ZL205A composite material.
Fig. 2 is 5 TiB for adding 0.2% Rare-Earth Ce element2The SEM microstructure picture of/ZL205A composite material.
Fig. 3 is the hot cracking tendency test experiments result for not adding Rare-Earth Ce element.
Fig. 4 is the hot cracking tendency test experiments result for adding 0.2% Rare-Earth Ce element.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Embodiment
This embodiment carries out composite material hot cracking tendency test experiments twice, be respectively do not added in composite material it is dilute
The hot cracking tendency test experiments of the Rare-Earth Ce element of the hot cracking tendency test experiments and addition 0.2% of native Ce element.It is real twice
It tests and compares, the validity of the inventive method is better illustrated with this.0.2% to the effect that is added in composite material below
The detailed process of the hot cracking tendency test experiments of Rare-Earth Ce element:
Step 1, the ZL205A alloy for weighing certain mass first, then calculating the 5% of ZL205A alloy mass is TiB2Particle
Quality；
Step 2, the quality for calculating and weighing potassium fluoborate and potassium fluotitanate according to following total chemical equation, total chemistry
Equation is as follows:
6KBF4+3K2TiF6+ 10Al=9KAlF4+K3AlF6+3TiB2
Relative molecular mass: 756 720 270 210
X(KBF4) X(K2TiF6) X(fine aluminium)X(alloy mass) x5%
Calculate TiB2The quality of particle is the 5% of ZL205A alloy mass, thus chemical equation, lists proportion expression:
Calculate the respective quality of potassium fluoborate and potassium fluotitanate and fine aluminium；
Potassium fluoborate and potassium fluotitanate powder are uniformly mixed by step 3, are then placed in 250 DEG C of holding furnace and are kept the temperature two hours,
It is bundled into several parcels with aluminium-foil paper after taking-up；
Step 4 first has to preheating crucible into 300 DEG C or so, then preparatory load weighted ZL205A alloy is put into crucible and is heated
850 DEG C are warming up to, is completely melt to alloy；
Step 5, after alloy is completely melt, the obtained aluminium foil parcel of step 3 is added at 850 DEG C, is pressed into conjunction with bell jar
It in golden melt, does not stir, keeps the temperature 1 hour；
Step 6 drops to 750 DEG C to temperature, removes residual salt and slag, comprises the concrete steps that: crucible is tilted to just metal bath
It does not flow out, a part of residual salt on surface is poured out at this time, then goes out remaining residual salt along the outside wooden dipper of four wall of crucible with iron spoon
And slag；
Deslagging agent (carbon trichloride) is added into metal bath in step 7, and the amount of addition is potassium fluoborate and potassium fluotitanate gross mass
10%, be added in two portions, 5% be added every time, every time stir 30 ~ 60 seconds, then crucible is put into furnace in 750 DEG C of heat preservation 10-
It 20 minutes, then removes the gred, refines so twice；
After step 8, slagging-off, quality is accounted for containing TiB20.2% Rare-Earth Ce element of the composite material quality of particle and according to total
Chemical equation calculates and load weighted fine aluminium is added in metal bath together, and in-furnace temperature is increased to 800 DEG C of guarantors
Temperature 30 minutes or so；
Step 9, after Rare-Earth Ce fusing after, need to be stirred with graphite rod, metal bath need to be stirred 30 ~ 60 seconds, stir 1 ~ 2 time, stirring
Time interval is 10 ~ 20 minutes, then keeps the temperature 30 minutes at 750 DEG C；
Step 10 is come out of the stove when metal bath temperature drops to 740 DEG C, is finally stirred 10 ~ 30 seconds, is then removed surface slag and oxygen
Change skin, prepares casting when metal bath temperature drops to 720 DEG C；
Metal bath containing Rare-Earth Ce element is poured into CRC(constraining rod method of testing by step 11) mold carries out experiment test；
Step 12, about be poured after 10 minutes or so, open CRC mold, check position and the width of fire check.
The result that the hot cracking tendency test experiments that the present embodiment adds 0.2% Rare-Earth Ce element obtain is shown in Fig. 4;It does not add
The hot cracking tendency test experiments result of Rare-Earth Ce element is shown in Fig. 3.
According to the hot cracking tendency of following formula assessment material:
HTS=∑ (f
location
×f
length
×f
crack
)
In formulaf location --- Crack Parameters position
f length --- the length parameter of bar where crackle
f crack --- crack width parameter
Crack width parameter be actual crack most width from；The length parameter of bar refers to from most quarter butt to longest where crackle
The length parameter of four bars of bar is successively are as follows: 32,16,8,4；Crack Parameters position refers to that cracking parameter in root is 1,
It is 3 that position, which cracks parameter, among bar, and cracking parameter in bulb is 2.
5 TiB are calculated by Fig. 32The hot cracking tendency value of/ZL205A composite material are as follows:
HTS=1.348X4X1=5.392
5 TiB of 0.2% Rare-Earth Ce element of addition are calculated by Fig. 42The hot cracking tendency value of/ZL205A composite material are as follows:
HTS=0.499x4x1=1.996
The hot cracking tendency value of two groups of experimental materials is compared, it can be found that the Rare-Earth Ce element of addition 0.2% can effectively reduce
5 TiB2The hot cracking tendency of/ZL205A composite material.
Microstructure observation is carried out to the material of hot cracking tendency test experiments twice:
Fig. 1 is 5TiB2The SEM microstructure picture of/ZL205A composite material.
Fig. 2 is 5 TiB for adding 0.2% Rare-Earth Ce element2The SEM microstructure picture of/ZL205A composite material.
It is compared and is found by two figures, hence it is evident that Fig. 2 crystal grain is refined, and illustrates to add Rare-Earth Ce element to the crystal grain of composite material
Play refining effect.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of method that addition Rare-Earth Ce element reduces aluminum matrix composite hot cracking tendency, which is characterized in that including following
Specific steps:
S1,5TiB is prepared using in-situ authigenic melt technology2/ ZL205A composite material；
S11, it is calculated according to following chemical equation and weighs required potassium fluoborate (KBF4), potassium fluotitanate (K2TiF6) and
Fine aluminium, and by weighed potassium fluoborate (KBF4) and potassium fluotitanate (K2TiF6) be uniformly mixed；
6KBF4+3K2TiF6+ 10Al=9KAlF4+K3AlF6+3TiB2
S12, preparatory load weighted ZL205A alloy is put into melting in the crucible preheated in the holding furnace for be previously placed in 300 DEG C,
After alloy is completely melt, temperature maintains 850 DEG C, and weighed potassium fluoborate and potassium fluotitanate is added；
S13, when metal bath temperature is down to 750 DEG C, remove metal bath the surface residual salt and slag that have reacted, and be added and remove
Slag agent, refines metal bath；
S2, it is calculated load weighted Rare-Earth Ce element and according to total chemical equation and load weighted fine aluminium is added together
It in the metal bath refined to the step S13, is sufficiently stirred with graphite rod, drops to 740 to metal bath temperature
DEG C when come out of the stove, be sufficiently stirred, finally poured in the mold of preheating insulation using being previously placed in 250 DEG C of holding furnace again
Note.
2. method according to claim 1, which is characterized in that in the step S11, by potassium fluoborate (KBF4) and fluotitanic acid
Potassium (K2TiF6) after mixing, it is put into holding furnace and keeps the temperature two hours at 250 DEG C, take out, and it is bundled into aluminium-foil paper several
Parcel.
3. method according to claim 1, which is characterized in that in the step S12, the temperature of melting is 850 DEG C, wherein melting
The ZL205A alloy of refining need to meet national standard.
4. method according to claim 1, which is characterized in that, will be with the potassium fluoborate of aluminium foil paper wrapper in the step S12
(KBF4) and potassium fluotitanate (K2TiF6) when being added to alloy melt, be pressed into alloy melt, do not stirred with bell jar, heat preservation 1
Hour.
5. method according to claim 1, which is characterized in that in the step S13, remove residual salt using tipping and melt
Crucible is tilted to just metal bath first and not flowed out by slag, and a part of residual salt on surface is poured out at this time, uses iron spoon later
Go out remaining residual salt and slag along the outside wooden dipper of four wall of crucible.
6. method according to claim 1, which is characterized in that in the step S13, the deslagging agent used for carbon trichloride,
The amount that deslagging agent is added is the 10% of potassium fluoborate and potassium fluotitanate gross mass, is added in two portions, 5% is added every time, and stir every time
It mixes 30 ~ 60 seconds, then keeps the temperature 10 ~ 20 minutes at 750 DEG C, finally remove the gred, according to said method twice to metal bath refining.
7. method according to claim 1, which is characterized in that in the step S2, the content of Rare-Earth Ce element is containing TiB2?
The 0.2% of the composite material quality of grain, wherein the purity of Rare-Earth Ce need to be greater than 99.5%.
8. method according to claim 1, which is characterized in that in the step S2, needing after addition Rare-Earth Ce element will be in furnace
Temperature is increased to 800 DEG C and keeps the temperature 30 minutes or so.
9. method according to claim 1, which is characterized in that in the step S2, metal bath 1 ~ 2 need to be stirred with graphite rod
Secondary, 30 ~ 60 seconds every time, mixing time interval was 10 ~ 20 minutes, then kept the temperature 30 minutes at 750 DEG C, then Temperature fall.
10. method according to claim 1, which is characterized in that in the step S2, after being again stirring for 10 ~ 30 seconds, remove table
Face slag and oxide skin are poured when metal bath temperature is dropped to greater than 10 DEG C of cast temperature or so.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807701A (en) * | 2022-05-09 | 2022-07-29 | 内蒙古工业大学 | Novel cerium-containing high-temperature-resistant cast aluminum alloy and preparation method thereof |
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| CN108356259A (en) * | 2018-01-31 | 2018-08-03 | 上海交通大学 | A kind of nanometer of aluminum matrix composite powder and preparation method thereof |
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2019
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Application publication date: 20190409 |