CN108677067A - Anticorodal silk material and preparation method thereof - Google Patents

Anticorodal silk material and preparation method thereof Download PDF

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Publication number
CN108677067A
CN108677067A CN201810489477.9A CN201810489477A CN108677067A CN 108677067 A CN108677067 A CN 108677067A CN 201810489477 A CN201810489477 A CN 201810489477A CN 108677067 A CN108677067 A CN 108677067A
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aluminium alloy
alloy
silk material
preparation
anticorodal
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CN108677067B (en
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王晓明
朱胜
邱六
韩国峰
常青
任智强
赵阳
周超极
陈永星
张雨豪
梁广
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Academy of Armored Forces of PLA
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Arc Welding In General (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a kind of anticorodal silk materials and preparation method thereof, and each component and its weight percent relative to the silk material gross weight are in aluminium alloy silk material：Si 11.5%~12.5%, Cr 0.3%~0.35%, Er 0.2%~0.3%, surplus are Al and inevitable impurity.It is significantly improved using the cladding layer corrosion resisting property that the silk material of the present invention is prepared in aluminum alloy surface using electric arc cladding forming technology, compared with traditional Al Si serial alloy welding wires, the charge-transfer resistance that its ac impedance spectroscopy measures improves about 20%, corrosion potential improves about 15%, anti-corrosion capability of the alloy under the high salt mist environment of high temperature and humidity is strong, and can effectively mitigate aluminium alloy matrix surface scuffing, realize the efficient reparation of damage component.

Description

Anticorodal silk material and preparation method thereof
Technical field
The present invention relates to a kind of aluminum alloy materials, and in particular to a kind of anticorodal and preparation method thereof, aluminium close Spun gold material and preparation method thereof.
Background technology
Aluminium alloy has the series of advantages such as density is low, specific strength specific stiffness is high, electrical and thermal conductivity is good, is widely used in boat The fields such as sky, space flight, machinery and automobile making.Under the use of high-frequency high intensity and the operating environment of the high salt fog of high temperature and humidity Under how to control the generation of aluminum alloy materials corrosion phenomenon and become new research to maintain mechanical equipment to operate steadily in the long term Hot spot.
Welding cladding is an important branch of fast shaping technology, can be used for alloy surface is modified and defect Forming is repaired, and overlay and matrix are metallurgical binding, bond strength is high, and heat input is big, and forming efficiency is high.Due to aluminium alloy material Material is widely used, and Welded silk material has also obtained most commonly used application in welding field.However as technology requirement Raising, common Al-Si silk materials have been unable to meet the demand of production, need to be improved to meet skill alusil alloy silk material Art requirement.
Chinese patent literature CN 105200257A（Application number 201510685535.1）It is rotten to disclose a kind of rare earth Er The method of hypoeutectic al-si alloy, after melting, addition refining agent carries out refining degasification to alusil alloy, and Er elements are then added, Heat preservation is stood at a temperature of 720 DEG C, at a certain temperature castable；Er elements are added with alloy form, and Er elements are in alloy Mass percentage in melt is controlled in 0.05%~0.5wt.%.The document describes, and is added in hypoeutectic al-si alloy Suitable to add the pattern and size for changing eutectic silicon after Er, silicon mutually becomes tiny graininess from coarse lamellar, And the average area of common reciever has dropped 80%, generates apparent modification effect.Er also removes aluminium alloy with dehydrogenation Gas, the effect for reducing oxide inclusion, improve the tissue of alloy, promote its mechanical property.
Chinese patent literature CN 105543586A（Application number 201610130553.8）Disclose a kind of HI high impact containing Er Toughness cast Al-Si alloy, each alloy compositions and its weight percent are in alloy：The content of Si is 6.7~7.3%, Mg's The content that the content that the content that content is 0.32~0.40%, Ti is 0.08~0.15%, Er is 0.08~0.25%, B is The content of 0.005%, Fe are not more than 0.13%, and surplus is the impurity that Al and total amount are no more than 0.02%.The invention adds dilute Earth elements Er and Ti, crystal grain are refined, and impact flexibility (ak) is obviously improved.
Alusil alloy disclosed in above-mentioned two parts of documents, due to the addition of Er elements, mechanical property is improved, still The corrosion resistance of alloy material is unknown.
Invention content
Technical problem to be solved by the invention is to provide a kind of anticorodal, aluminium alloy silk material, use aluminium alloy The cladding layer and respective preparation method that silk material is welded.
Realize that the technical solution of the object of the invention is a kind of anticorodal silk material, in aluminium alloy silk material each component and It is relative to the weight percent of the silk material gross weight：Si 11.5%~12.5%, Cr 0.3%~0.35%, Er 0.2%~ 0.3%, surplus is Al and inevitable impurity.
A kind of preparation method of anticorodal silk material as described above, includes the following steps：
1. raw material descale, cleaning, drying, sealing are for use.
2. weighing the desired amount of fine aluminium, pure silicon, pure chromium and Al-Er alloys by the chemical composition of aluminium alloy silk material.
3. by step 2. in the raw material that weigh be sequentially placed into according to the sequence of fusing point from high to low the water-cooled copper of smelting furnace In mould, vacuum arc melting furnace vacuumizes, under argon gas protective condition, molten alloy.
4. refining agent is blown into refining treatment in aluminium alloy with nitrogen.
5. aluminium alloy is sent into heat extruder, bar is made by heat extruder, bar is fitted into softening tank and anneals, from It is so cooling.
6. being silk material by gained bar temperature drawing.
7. aluminium alloy silk material is made after heat preservation.
Above-mentioned steps 4. in refining agent used be KCl, C2Cl6In one kind.
Above-mentioned steps 5. in bar be fitted into softening tank and anneal 2~4 hours at 400 DEG C~550 DEG C, then natural cooling To 200~250 DEG C.
Above-mentioned steps 7. in keep the temperature 6~15 hours at a temperature of 140~200 DEG C.
A kind of aluminium alloy, each component and its weight percent relative to the aluminium alloy gross weight are in aluminium alloy：Si 11.5%~12.5%, Cr 0.3%~0.35%, Er 0.2%~0.3%, surplus are Al and inevitable impurity.
A kind of preparation method of aluminium alloy as described above, includes the following steps：
1. raw material descale, cleaning, drying, sealing are for use.
2. weighing the desired amount of fine aluminium, pure silicon, pure chromium and Al-Er alloys by the chemical composition of aluminium alloy silk material.
3. by step 2. in the raw material that weigh be sequentially placed into according to the sequence of fusing point from high to low the water-cooled copper of smelting furnace In mould, vacuum arc melting furnace vacuumizes, under argon gas protective condition, molten alloy.
4. furnace cooling obtains aluminium alloy cast ingot.
Step 3. in be added raw material before pure titanium is added in water cooled copper mould.
Above-mentioned steps are 3. under argon gas protective condition when molten alloy, and each smelting time is 120~180s, per minor tick Time is 150~210s, alloy striking melting 2~4 times repeatedly.
A kind of cladding layer obtained by above-mentioned aluminium alloy silk material welding.
The present invention has the effect of positive：（1）The aluminium alloy of the present invention divides in common Al-Si systems alloy to be added one after another Cr, Er element：
The content of Si is 12% in Al-Si systems alloy（Weight percentage, similarly hereinafter）, it is at this time al-si eutectic alloy, as-cast structure For dendroid arborescent structure, α-Al respectively account for half with eutectic structure, and even tissue distribution, without blocky primary silicon, tensile strength is about For 200MPa, elongation percentage 2.31%.
Cr elements are first added into Al-Si systems alloy, the content of Cr elements is in 0.3%~0.35%, Al-Si systems alloy Eutectic Silicon in Al-Si Cast Alloys desmachyme becomes interrupted, Dispersed precipitate rod-short, and fine particle shape AlCr is formed in tissue2Phase, in aluminium silicon wafer It is precipitated at boundary, the tensile strength of alloy improves 15Mpa or more at this time, and elongation percentage slightly improves；The lower eutectic silicon of hardness obtains To refinement, for silicon crystal grain Dispersed precipitate in alloy, the higher Al-Cr phases of hardness of formation make hardness improve about 10%.
Then rare earth element er is added in Al-Si-Cr systems alloy, the addition that Er contents are 0.2%~0.3%, Er refines Grain structure improves intensity, and the tensile strength of alloy is increased to 230MPa at this time, and elongation percentage improves 10%, and microhardness improves about 20%。
The present invention adds micro alloying element on the basis of Al-Si eutectic alloys, and orientation improves its property, obtains height Strong anti-corrosion alloy material.
（2）Al-Si-Cr-Er systems alloy prepared by the present invention is prepared into silk through hot extrusion-drawing, using electric arc cladding at The corrosion resisting property of the cladding layer that shape technology is prepared in aluminum alloy surface, welding gained cladding layer is high, with traditional Al-Si systems alloy Welding wire is compared, and the charge-transfer resistance that ac impedance spectroscopy measures improves about 20%, and corrosion potential improves about 15%, and alloy exists Anti-corrosion capability under the high salt mist environment of high temperature and humidity is strong, and can effectively mitigate aluminium alloy matrix surface scuffing, realizes damage component Efficiently repair.
Description of the drawings
Fig. 1 is that the tissue topography SEM of each alloy cast ingot schemes, and the A figures in Fig. 1 are the SEM figures of Al-12Si alloys, and B figures are The SEM of Al-12Si-0.3Cr alloys schemes, and C figures and D figures are SEM of the Al-12Si-0.3Cr-0.2Er alloys under different multiplying Figure.
Fig. 2 is the cladding layer Alloy At Room Temperature quasi-static tensile engineering stress strain curve of test example 1.
Fig. 3 is the XRD phase structure calibration results of the cladding layer alloy of test example example 1.
Fig. 4 is the polarization curve of the cladding layer alloy of test example 1.
Specific implementation mode
（Embodiment 1 is to embodiment 7）
Each component and its weight percent relative to the aluminium alloy gross weight are in anticorodal：Si 11.5%~ 12.5%, Cr 0.3%~0.35%, Er 0.2%~0.3%, surplus are Al and inevitable impurity.
Each component and its weight relative to the aluminium alloy gross weight in embodiment 1 to the anticorodal of embodiment 7 Amount percentage see the table below 1.
The component and weight percent of 1 aluminium alloy of table（wt%）
Impurity in upper table is inevitable impurity.
By taking the aluminium alloy of embodiment 1 as an example, the preparation method of the aluminium alloy of the present invention is illustrated.
The preparation method of the aluminium alloy of embodiment 1 includes the following steps：
1. raw material pre-treatment：The materials such as blocky or sheet Al, Si, Cr, Al-Er alloy are polished with abrasive machine respectively and remove table Surface oxidation film；The material for eliminating oxidation film is cleaned by ultrasonic respectively, sonification medium is acetone and alcohol（In the present embodiment Volume ratio 1:1）, each material clean 15~30 minutes, cleaning is finished dries in drying box, is used in combination tweezers to place it in fresh-keeping It is sealed in bag for use.
2. dispensing：By the chemical composition of the aluminium alloy of embodiment 1 the desired amount of fine aluminium, pure silicon, pure is weighed with electronic balance Chromium and Al-Er alloys.
3. aluminum alloy vacuum electric arc melting：Smelting equipment uses WK-II type vacuum arc melting furnaces, is added before raw material in water Pure titanium is added in cold copper mold, to reduce the oxidation of metal in fusion process.
By step 2. in the raw material that weigh be sequentially placed into according to the sequence of fusing point from high to low the water cooled copper mould of smelting furnace In, and big bulk material is made to be placed in most surface layer as possible, to reduce the splashing that gun body stirring in fusion process causes element, avoid The gap of practical melting and design element mass percent covers bell, tightens knob after material is placed.
The applying argon gas repeatedly in vacuum arc melting furnace, mechanical vacuumizing to 4.5 × 10-3Pa, thoroughly to eliminate vacuum chamber Interior oxygen after vacuumizing every time, melts pure titanium oxygen uptake in water cooled copper mould, is finally filled with high-purity argon gas to 10-2Mpa.It is protected in argon gas Under the conditions of shield, molten alloy, each smelting time is 120~180s, and each interval time is 180s, alloy striking melting repeatedly 3 times, to reduce element segregation, it is sufficiently mixed composition of alloy element.
4. it is 30g that furnace cooling, which obtains quality, specification is the aluminium alloy cast ingot of the round button shape of Φ 30mm, is as implemented The aluminium alloy of example 1.
Remaining is same as Example 1 to the preparation method of the aluminium alloy of embodiment 7 for embodiment 2, the difference is that step 2. when dispensing, the desired amount of fine aluminium, pure silicon, pure chromium and Al-Er are weighed according to the chemical composition of the corresponding aluminium alloy of each embodiment Alloy.
Using the 200 type ring border electronic scanner microscopes of Quangta of FEI Co.（SEM）To alloy structure carry out observation and Analysis, alloy sample includes Al-12Si alloys, Al-12Si-0.3Cr alloys, Al-12Si-0.3Cr-0.2Er alloys.
Tensile strength Rm (MPa), elongation percentage A (%) press the mark of metal usable material chamber temperature stretching test method GB/T228-2002 Standard is detected.
Microhardness（HV）The standard that GB/T4340.2-1999 is tested by metal Vickers is detected.
See Fig. 1, the A figures in Fig. 1 are the SEM figures of Al-12Si alloys, and B figures are the SEM figures of Al-12Si-0.3Cr alloys, C Figure is that SEM of the Al-12Si-0.3Cr-0.2Er alloys under different multiplying schemes with D figures.
Schemed from SEM it can be found that the content of Si is 12% in Al-12Si systems alloy（Weight percentage, similarly hereinafter）, at this time For al-si eutectic alloy, as-cast structure is dendroid arborescent structure, and α-Al respectively account for half, even tissue distribution with eutectic structure. Strength of alloy is about 200MPa, elongation percentage 2.31% at this time.
Cr elements are added into Al-12Si systems alloy, the content of Cr elements is 0.3%, obtains Al-12Si-0.3Cr alloys. The Eutectic Silicon in Al-Si Cast Alloys desmachyme in Al-12Si systems alloy becomes interrupted, Dispersed precipitate rod-short at this time, and tiny is formed in tissue Granular AlCr2Phase is precipitated in aluminium silicon grain boundaries.The tensile strength of alloy improves 15Mpa or more at this time, and elongation percentage slightly improves； The lower eutectic silicon of hardness is refined, and silicon crystal grain Dispersed precipitate is in alloy, compared to Al-12Si alloys, due to being formed Hardness higher Al-Cr phases so that Al-12Si-0.3Cr alloy rigidities improve about 10%.
Rare earth element er is added in Al-12Si-0.3Cr systems alloy, Er contents are 0.2%, obtain Al-12Si-0.3Cr- 0.2Er alloys.The cenotype Al-Cr phases formed after trace Cr and rare earth element er and Al is added3Er Dispersed precipitates are in grain boundaries, energy Enough pinning dislocations and sub boundary, have refined grain structure, improve intensity.The tensile strength of alloy is increased to 230MPa at this time, prolongs It stretches rate and improves 10%, compared to Al-12Si alloys, microhardness 92.4HV improves about 20%.
The mechanics properties testing result of embodiment 1 to 7 alloy of embodiment see the table below 2.
The mechanics properties testing result of 2 alloy of table
（The preparation method of embodiment 8, aluminium alloy silk material）
Aluminium alloy silk material, each aluminium alloy silk material are prepared using hot extrusion-temperature drawing process（That is aluminium alloy welding wire）Chemical composition It is identical as aluminium alloy cast ingot, therefore specific ingredient is shown in Table 1.
Preparation method includes the following steps：
1. raw material pre-treatment：The materials such as blocky or sheet Al, Si, Cr, Al-Er alloy are polished with abrasive machine respectively and remove table Surface oxidation film；The material for eliminating oxidation film is cleaned by ultrasonic respectively, sonification medium is acetone and alcohol（In the present embodiment Volume ratio 1:1）, each material clean 15~30 minutes, cleaning is finished dries in drying box, is used in combination tweezers to place it in fresh-keeping It is sealed in bag for use.
2. dispensing：The desired amount of fine aluminium, pure silicon, pure chromium and Al-Er are weighed by the chemical composition of the aluminium alloy of embodiment 1 to close Gold.
3. aluminum alloy vacuum electric arc melting：Smelting equipment uses WK-II type vacuum arc melting furnaces, is added before raw material in water Pure titanium is added in cold copper mold, to reduce the oxidation of metal in fusion process.
By step 2. in the raw material that weigh be sequentially placed into according to the sequence of fusing point from high to low the water cooled copper mould of smelting furnace In, and big bulk material is made to be placed in most surface layer as possible, to reduce the splashing that gun body stirring in fusion process causes element, avoid The gap of practical melting and design element mass percent covers bell, tightens knob after material is placed.
The applying argon gas repeatedly in vacuum arc melting furnace, mechanical vacuumizing to 4.5 × 10-3Pa, thoroughly to eliminate vacuum chamber Interior oxygen after vacuumizing every time, melts pure titanium oxygen uptake in water cooled copper mould, is finally filled with high-purity argon gas to 10-2Mpa.It is protected in argon gas Under the conditions of shield, molten alloy, each smelting time is 120~180s, and each interval time is 180s, alloy striking melting repeatedly 3 times, to reduce element segregation, it is sufficiently mixed composition of alloy element.
4. refining agent is blown into refining treatment in aluminium alloy with nitrogen, the additive amount of refining agent is aluminium alloy weight 0.15%~0.3%, it is uniformly mixing to obtain aluminium alloy.The refining agent is KCl, C2Cl6In one kind.
5. aluminium alloy is sent into heat extruder, the bar of a diameter of 8mm is made up of heat extruder, bar is packed into softening At 400 DEG C~550 DEG C in slot（It is 500 DEG C in the present embodiment）Lower annealing 2~4 hours（It is 3h in the present embodiment）, natural cooling To 200~250 DEG C.
6. by the silk material that gained bar temperature drawing is diameter 1.6mm；300~400 DEG C of furnace temperature of annealing, time 3~4 when drawing Hour, tensile speed 1.5m/min.
7. keeping the temperature 6~15 hours at a temperature of 140~200 DEG C, aluminium alloy silk material is made.
According to the method described above, the corresponding aluminum-alloy wire of aluminum alloy chemical composition of embodiment 1 to embodiment 7 is made respectively Material.
（Embodiment 9, the preparation method of cladding layer）
It is real using state key is remanufactured when preparing cladding layer for the aluminium alloy silk material being prepared Following the procedure of Example 8 The digital 0 DC pulse MIG welding cladding forming techniques of TPS-400 of Fronius for testing outside Longitudinal Magnetic-field Has in room, use system The welding wire obtained obtains overlay to aluminium alloy welding.
（Test example）
Test object：The cladding layer that aluminium alloy welding wire welds made from aluminium alloy cast ingot using embodiment 1.
Sample prepares：It is respectively that 10mm × 5mm × 5mm is tried that cladding layer sample, which is respectively cut as size, using wire cutting The sample and standard tensile specimen of sample, Φ 3mm × 6mm, are cleaned by ultrasonic, grinding and polishing respectively later.
Test method and result：
（1）Tension test is carried out to tensile sample using omnipotent mechanics machine, obtains stress-strain diagram such as Fig. 2.
It is 230MPa, elongation percentage 3.4%, microhardness 92.4HV, comprehensive mechanical property to measure cladding layer sample tensile strength Rm It can be excellent.
（2）Using 2400 type X-ray diffractometers of Rigaku/max（XRD）Analyze the phase structure of cladding layer, sweep speed For 8 °/min, angular range is 10 °~100 °, and the XRD calibration results for being compared to obtain alloy phase structure according to pdf cards are as schemed Shown in 3.
From the figure 3, it may be seen that with the addition of Cr elements, the higher AlCr of hardness is formed with matrix Al2Phase, the phase Dispersed precipitate The hardness of alloy is significantly improved, rare earth element er forms Al after being added3Er phases show as the ball being distributed along crystal boundary in interrupted shape Shape compound effectively hinders the production of crystal grain, achievees the purpose that refine as-cast grain, the effective mechanical property for improving alloy.
（3）Using Princeton VMP3 electrochemical workstations, using sample as working electrode, saturated calomel electrode（SCE） For reference electrode, platinum plate electrode is three electrode measurement systems of auxiliary electrode, measures the polarization curve of cladding layer, scan method For potentiodynamic method, sweep speed is 20 mV/min.It measures polarization curve and traditional 4047 aluminium alloys comparison is as shown in Figure 4. Corrosion potential is increased to -0.7471V by -0.8545V, illustrates that cladding layer made from the aluminium alloy welding wire by the present invention is corrosion-resistant Property it is strong, while also illustrate the present invention aluminium alloy, the corrosion resistance of aluminium alloy silk material it is strong.

Claims (10)

1. a kind of anticorodal silk material, it is characterised in that：Each component and its relative to the silk material in aluminium alloy silk material The weight percent of gross weight is：Si 11.5%~12.5%, Cr 0.3%~0.35%, Er 0.2%~0.3%, surplus is for Al and not Evitable impurity.
2. a kind of preparation method of anticorodal silk material as described in claim 1, it is characterised in that including following step Suddenly：
1. raw material descale, cleaning, drying, sealing are for use；
2. weighing the desired amount of fine aluminium, pure silicon, pure chromium and Al-Er alloys by the chemical composition of aluminium alloy silk material；
3. by step 2. in the raw material that weigh be sequentially placed into the water cooled copper mould of smelting furnace according to the sequence of fusing point from high to low, Vacuum arc melting furnace vacuumizes, under argon gas protective condition, molten alloy；
4. refining agent is blown into refining treatment in aluminium alloy with nitrogen；
5. aluminium alloy is sent into heat extruder, bar is made by heat extruder, bar is fitted into softening tank and anneals, naturally cold But；
6. being silk material by gained bar temperature drawing；
7. aluminium alloy silk material is made after heat preservation.
3. the preparation method of anticorodal silk material according to claim 2, it is characterised in that：Step 4. in it is used Refining agent is KCl, C2Cl6In one kind.
4. the preparation method of anticorodal silk material according to claim 2, it is characterised in that：Step 5. in bar It is fitted into softening tank and anneals 2~4 hours at 400 DEG C~550 DEG C, then naturally cool to 200~250 DEG C.
5. the preparation method of anticorodal silk material according to claim 2, it is characterised in that：Step 7. in 6~15 hours are kept the temperature at a temperature of 140~200 DEG C.
6. a kind of aluminium alloy, it is characterised in that：Each component and its weight percent relative to the aluminium alloy gross weight in aluminium alloy Than for：Si 11.5%~12.5%, Cr 0.3%~0.35%, Er 0.2%~0.3%, surplus are Al and inevitable impurity.
7. a kind of preparation method of aluminium alloy as claimed in claim 6, it is characterised in that include the following steps：
1. raw material descale, cleaning, drying, sealing are for use；
2. weighing the desired amount of fine aluminium, pure silicon, pure chromium and Al-Er alloys by the chemical composition of aluminium alloy silk material；
3. by step 2. in the raw material that weigh be sequentially placed into the water cooled copper mould of smelting furnace according to the sequence of fusing point from high to low, Vacuum arc melting furnace vacuumizes, under argon gas protective condition, molten alloy；
4. furnace cooling obtains aluminium alloy cast ingot.
8. the preparation method of aluminium alloy according to claim 7, it is characterised in that：Step is 3. middle to be added before raw material in water cooling Pure titanium is added in copper mold.
9. the preparation method of aluminium alloy according to claim 7, it is characterised in that：3. step melts under argon gas protective condition When refining alloy, each smelting time is 120~180s, and each interval time is 150~210s, alloy striking melting 2~4 repeatedly It is secondary.
10. a kind of cladding layer obtained by the aluminium alloy silk material welding of claim 1.
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CN112458351B (en) * 2020-10-22 2021-10-15 中国人民解放军陆军装甲兵学院 High compressive strength nickel-cobalt-based high temperature alloy

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