CN108893627A - A kind of casting technique of high density aluminium alloy castings - Google Patents
A kind of casting technique of high density aluminium alloy castings Download PDFInfo
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- CN108893627A CN108893627A CN201810733890.5A CN201810733890A CN108893627A CN 108893627 A CN108893627 A CN 108893627A CN 201810733890 A CN201810733890 A CN 201810733890A CN 108893627 A CN108893627 A CN 108893627A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/08—Centrifugal casting; Casting by using centrifugal force in which a stationary mould is fed from a rotating mass of liquid metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/101—Moulds
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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
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/107—Means for feeding molten metal
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of casting techniques of high density aluminium alloy castings, include the following steps：S1, alloying ingredient is determined, wherein silicone content 0.5%, copper content 3.8%-4.9%, manganese content 0.6%-1.5%, Ti content 0.15%, content of magnesium 1.5%-2.0%, Zn content 0.3%, nickel content 0.2%, iron content 0.5%, surplus is A00 fine aluminium；Aluminum alloy materials are added to concentrate in melting furnace and melt, by manganese metal and A00 fine aluminium according to again than 1 by S2, melting heavy alloy:9 are added in melting furnace, are melted, then obtain highdensity alumal；S3, design technology parameter.The improvement that the present invention passes through the casting technique to aluminium alloy castings, solve the problems, such as occur stomata, bubble and shrinkage porosite in casting process, the purpose for making stomata, shrinkage cavity under the effect of the pressure up when realizing casting, improve casting accuracy, reduce machining operations, service life is extended, is easy to use.
Description
Technical field
The present invention relates to aluminium alloy casting technology field more particularly to a kind of casting techniques of high density aluminium alloy castings.
Background technique
Cast aluminium alloy gold is to fill casting mold with molten metal, obtains the aluminium alloy of various shape part blank.With low close
Degree, intensity is high, and corrosion stability and casting manufacturability are good, is limited the advantages that small by structural design of fittings, for manufacturing beam, combustion steamer leaf
Piece, the pump housing, hanger, wheel hub, air inlet lip and casing of engine etc..It is also used to manufacture cylinder head, gearbox and the work of automobile
Plug, the parts such as shell and the booster pump housing of instrument and meter.
Cast aluminium alloy gold has good casting character, and complex-shaped part can be made；Huge add is not needed
Equipment；Have many advantages, such as to save metal, reduce cost, reduce work hours, but when the casting of traditional aluminium alloy castings, gas can be generated
The problems such as hole bubble, shrinkage porosite and crackle, cause rough, cast structure is loose etc., cast properties and service life are influenced,
For this purpose, it is proposed that a kind of casting technique of high density aluminium alloy castings solves the above problems.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of high density aluminium alloy casting proposed
The casting technique of part.
To achieve the goals above, present invention employs following technical solutions：
A kind of casting technique of high density aluminium alloy castings, includes the following steps：
S1, alloying ingredient is determined：Wherein silicone content 0.5%, copper content 3.8%-4.9%, manganese content 0.6%-
1.5%, Ti content 0.15%, content of magnesium 1.5%-2.0%, Zn content 0.3%, nickel content 0.2%, iron content 0.5% is remaining
Amount is A00 fine aluminium；
S2, melting heavy alloy, by aluminum alloy materials be added to concentrate melting furnace in melt, by manganese metal with
A00 fine aluminium is according to again than 1:9 are added in melting furnace, are melted, then obtain highdensity alumal；
S3, design technology parameter judge defect kind and tendency according to the architectural characteristic and previous experiences of casting, reserve
Surplus is cut out, determines the Best gate location of mold and casting；
S4, it is finely repaired after wax-pattern is designed and made according to drawing using dewaxing manufacture wax-pattern, it will be more
A wax-pattern lower end is connected on the intracorporal investment pattern die of cylinder, and the lower end of cylinder is equipped with opening, facilitates dewaxing and casting, spray layers
Parting compound, parting compound get over Bao Yuehao, and binder is poured into cylinder, using in vacuum pump discharge gas binder while vibration
Gas prevents the generation of stomata, after 2-4 exhaust, is dried in the drying oven of 100-180 degree, in drying
It dewaxes simultaneously, binder and cylinder form casting mould, to produce casting；
A00 fine aluminium is placed in melting furnace and is melted, when temperature reaches 750-790 and spends, aluminium manganese is closed by S5, melting
While gold is added, it is sufficiently stirred, when temperature reaches 790 degree or more again, it is molten that the graphite-pipe of logical nitrogen is protruded into aluminium alloy
Liquid bottom, and it is mobile in different location, and so that enabling aluminum alloy to solution realizes uniformly refining, refining time is 5-10 minutes；
S6, slag hitting carry out slag hitting to aluminium alloy solution using slagging agent after refining every time, after 3-5 slag hitting, by aluminium
Alloy solution temperature is maintained between 740-790 degree, is ready for casting；
Prepare before S7, casting, opens the capping of centrifugal casting machine, rotating bar is equipped in centrifugal casting machine, is set in rotating bar
There is cavity, the casting mould baked is placed on one end in cavity and fixes mold, through equipped with casting in rotating bar
Pipe, and one end of cast tubes is corresponding with the casting gate on casting mould, runs through in capping and is equipped with quantitative beaker, quantitative beaker
Lower end is through capping and contradicts in the upper end of cast tubes；
S8, casting utilize the aluminium alloy solution in melting furnace with graduated mechanical scoop out of melting furnace to quantitative
Aluminium alloy solution is conveyed in beaker, while driving rotating bar high speed rotation using the driving motor on centrifugal casting machine, by pouring
Aluminium alloy solution is poured into casting mould by cast tube and sprue gate, due under the driving of centrifugal force, make metal liquid get rid of to
Casting mold side wall makes stomata, shrinkage cavity under the effect of the pressure up, to obtain the casting of dense structure, helps and its mechanicalness
The raising of energy；
Casting mould is taken out using manipulator, is put when temperature is down between 350-450 degree by S9, removal binder
Enter the pond of 50-70 degree, carries out the removal of binder and the reduction of temperature, processed after natural cooling.
Preferably, the parting compound is made of turpentine oil.
Preferably, the centrifugal casting machine is vertical centrifugal-casting machine.
Preferably, the quantitative beaker is made of silica material.
Preferably, the material of the binder is sodium metasilicate.
Preferably, the slagging agent consists of the following compositions：25-45 parts of sodium chloride, 30-50 parts of potassium chloride, calcirm-fluoride 3-7
Part, 1-6 parts of alchlor, 1-6 parts of Na3AIF, the above proportion is weight fraction ratio.
Compared with prior art, the beneficial effects of the invention are as follows：
1, by the cooperation of centrifugal casting machine, quantitative beaker and cast tubes, centrifugal casting machine electric rotating lever high speed rotation,
It solves the problems, such as to be easy to appear stomata and bubble, realizes stomata, the purpose that shrinkage cavity is made up under the effect of the pressure, promote to cast
Part contractive effect is good, long service life；
2, by the cooperation of centrifugal casting machine and slagging agent, slag hitting is carried out to aluminium alloy solution using slagging agent and is removed slag, is solved
Determined during conventional cast because sundries causes the low density problem of cast structure too much, reached cast structure closely and
Highdensity effect, and material is saved in centrifugal casting, is reduced costs；
In conclusion the present invention can improve casting essence to make stomata, shrinkage cavity under the effect of the pressure up when casting
Degree, reduces machining operations, reduces costs, and saves energy consumption, extends service life, is easy to use.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
A kind of casting technique of high density aluminium alloy castings, includes the following steps：
S1, alloying ingredient is determined：Wherein silicone content 0.5%, copper content 3.8%-4.9%, manganese content 0.6%-
1.5%, Ti content 0.15%, content of magnesium 1.5%-2.0%, Zn content 0.3%, nickel content 0.2%, iron content 0.5% is remaining
Amount is A00 fine aluminium；
S2, melting heavy alloy, by aluminum alloy materials be added to concentrate melting furnace in melt, by manganese metal with
A00 fine aluminium is according to again than 1:9 are added in melting furnace, are melted, then obtain highdensity alumal；
S3, design technology parameter judge defect kind and tendency according to the architectural characteristic and previous experiences of casting, reserve
Cutting and grind out, determine the Best gate location of mold and casting；
S4, it is finely repaired after wax-pattern is designed and made according to drawing using dewaxing manufacture wax-pattern, it will be more
A wax-pattern lower end is connected on the intracorporal investment pattern die of cylinder, and the lower end of cylinder is equipped with opening, is open and is set as best to be horn-like,
Facilitate dewaxing and casting, spray layers parting compound, parting compound is made of turpentine oil, and parting compound gets over Bao Yuehao, and binder is fallen
Enter cylinder, the material of binder is sodium metasilicate, using the gas in vacuum pump discharge gas binder while vibration, prevents gas
The generation in hole is dried in the drying oven of 100-180 degree after 2-4 exhaust, is taken off while drying
Wax, binder and cylinder form casting mould, to produce casting；
A00 fine aluminium is placed in melting furnace and is melted, when temperature reaches 750-790 and spends, aluminium manganese is closed by S5, melting
While gold is added, it is sufficiently stirred, when temperature reaches 790 degree or more again, it is molten that the graphite-pipe of logical nitrogen is protruded into aluminium alloy
Liquid bottom, and it is mobile in different location, and so that enabling aluminum alloy to solution realizes uniformly refining, refining time is 5-10 minutes, nitrogen
Pressure is 0.15-0.3MPa；
S6, slag hitting carry out slag hitting to aluminium alloy solution using slagging agent after refining every time, and slagging agent is by following component group
At：25-45 parts of sodium chloride, 30-50 parts of potassium chloride, 1-6 parts of alchlor, 1-6 parts of Na3AIF, are matched above by 3-7 parts of calcirm-fluoride
Than aluminium alloy solution temperature is maintained between 740-790 degree after 3-5 slag hitting for weight fraction ratio, it is ready for pouring
Casting；
Prepare before S7, casting, open the capping of centrifugal casting machine, centrifugal casting machine is vertical centrifugal-casting machine, centrifugal casting
It makes and is equipped with rotating bar in machine, be equipped with cavity in rotating bar, the casting mould baked is placed on one end in cavity and by mould
Tool is fixed, and is run through in rotating bar and is equipped with cast tubes, and one end of cast tubes is corresponding with the casting gate on casting mould, in capping
Through quantitatively beaker is equipped with, quantitative beaker is made of silica material, and the lower end of quantitative beaker through capping and contradicts
The upper end of cast tubes；
S8, casting utilize the aluminium alloy solution in melting furnace with graduated mechanical scoop out of melting furnace to quantitative
Aluminium alloy solution is conveyed in beaker, while driving rotating bar high speed rotation using the driving motor on centrifugal casting machine, by pouring
Aluminium alloy solution is poured into casting mould by cast tube and sprue gate, due under the driving of centrifugal force, make metal liquid get rid of to
Casting mold side wall makes stomata, shrinkage cavity under the effect of the pressure up, to obtain the casting of dense structure, helps and its mechanicalness
The raising of energy；
Casting mould is taken out using manipulator, is put when temperature is down between 350-450 degree by S9, removal binder
Enter the pond of 50-70 degree, carries out the removal of binder and the reduction of temperature, processed after natural cooling, carried out using steel sand
Spin finishing detects internal soundness using a automatic inspection equipment, obtains the aluminium alloy castings of internal soundness qualification.
In the present invention, centrifugal casting machine is vertical centrifugal-casting machine, the model SJL-8330B of vertical centrifugal-casting machine,
Parting compound is made of turpentine oil, and the material of binder is sodium metasilicate, and slagging agent consists of the following compositions：25-45 parts of sodium chloride,
30-50 parts of potassium chloride, 3-7 parts of calcirm-fluoride, 1-6 parts of alchlor, 1-6 parts of Na3AIF, the above proportion is weight fraction ratio.It is suitable
For magnesium content less than 2%, in the case of 700-800 DEG C of temperature, in the reduction slag that aluminium and aluminium alloy smelting use when casting
Aluminium content, so that slag and the segregative slagging agent of alloy.
In the present invention, when in use, by aluminum alloy materials be added to concentrate melting furnace in melt, by manganese metal with
A00 fine aluminium is according to again than 1:9 are added in melting furnace, are melted, and then obtain highdensity alumal, design technology ginseng
Number, according to the architectural characteristic and previous experiences of casting, judge defect kind and tendency, reserve cutting surplus, determine mold with
The Best gate location of casting, casting gate are set as best in horn-like, manufacture wax-pattern, wax-pattern design using dewaxing according to drawing
And after making, finely repaired, multiple wax-pattern lower ends is connected on the intracorporal investment pattern die of cylinder, the lower end of cylinder
Equipped with opening, opening is connect with loudspeaker sprue gate, facilitates dewaxing and casting, spray layers parting compound, and parting compound gets over Bao Yuehao, will
Binder pours into cylinder, using the gas in vacuum pump discharge gas binder while vibration, prevents the generation of stomata, passes through
It after 2-4 exhaust, is dried in the drying oven of 100-180 degree, is dewaxed while drying, binder and cylinder
Casting mould is formed, to produce casting, A00 fine aluminium is placed in melting furnace and is melted, reaches 750-790 degree in temperature
When, it while alumal is added, is sufficiently stirred, when temperature reaches 790 degree or more again, by the graphite-pipe of logical nitrogen
Aluminium alloy solution bottom is protruded into, and mobile in different location, so that enabling aluminum alloy to solution realizes uniformly refining, refining time 5-
10 minutes, slag hitting is carried out to aluminium alloy solution using slagging agent after refining every time, after 3-5 slag hitting, by aluminium alloy solution
Temperature is maintained between 740-790 degree, when aluminium alloy solution storage was more than 2 hours or more in melting furnace, before being cast, is needed
It is refined, is ready for casting, the aluminium alloy solution in melting furnace is utilized with graduated mechanical scoop from melting furnace
Aluminium alloy solution is conveyed in the quantitative beaker of introversion, while driving rotating bar high speed to revolve using the driving motor on centrifugal casting machine
Turn, aluminium alloy solution is poured into casting mould by cast tubes and sprue gate, due to making metal under the driving of centrifugal force
Liquid is got rid of to casting mold side wall, makes stomata, shrinkage cavity under the effect of the pressure up, to obtain the casting of dense structure, help with
The raising of its mechanical performance removes binder, when temperature is down between 350-450 degree, using manipulator by casting mould
It takes out, is put into the pond of 50-70 degree, carry out the removal of binder and the reduction of temperature, processed after natural cooling, utilize steel
Sand is ground, centrifugal casting compare with the advantage of traditional sand casting be embodied in molten metal fill under the action of the centrifugal force type and
Solidification, metal feeding effect is good, and cast structure is fine and close, and good mechanical property, casting hollow casting is not required to dead head, metal utilization
It is greatly improved, therefore for the casting of certain specific shapes, centrifugal casting is a kind of saving material, saves energy consumption, efficiently
The technique of benefit is easy to use.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of casting technique of high density aluminium alloy castings, which is characterized in that include the following steps：
S1, alloying ingredient is determined, wherein silicone content 0.5%, copper content 3.8%-4.9%, manganese content 0.6%-1.5%, titanium
Content 0.15%, content of magnesium 1.5%-2.0%, Zn content 0.3%, nickel content 0.2%, iron content 0.5%, surplus are that A00 is pure
Aluminium；
Aluminum alloy materials are added to concentrate in melting furnace and melt by S2, melting heavy alloy, and manganese metal is pure with A00
Aluminium is according to again than 1:9 are added in melting furnace, are melted, then obtain highdensity alumal；
S3, design technology parameter judge defect kind and tendency, reserve and cut according to the architectural characteristic and previous experiences of casting
Surplus is cut, determines the Best gate location of mold and casting；
S4, design simultaneously manufacture investment pattern die, manufacture wax-pattern using dewaxing according to drawing, after wax-pattern is designed and is made, into
Row is fine to be repaired, and multiple wax-pattern lower ends are connected on the intracorporal investment pattern die of cylinder, and the lower end of cylinder is equipped with opening, facilitates dewaxing
And casting, spray layers parting compound, parting compound gets over Bao Yuehao, and binder is poured into cylinder, and vibration while is arranged using vacuum pump
Gas in gas binder out prevents the generation of stomata, after 2-4 exhaust, in the drying oven of 100-180 degree into
Row drying dewaxes while drying, and binder and cylinder form casting mould, to produce casting；
A00 fine aluminium is placed and is melted in melting furnace by S5, melting, when temperature reaches 750-790 and spends, by alumal plus
It while entering, is sufficiently stirred, when temperature reaches 790 degree or more again, the graphite-pipe of logical nitrogen is protruded into aluminium alloy solution bottom
Portion, and it is mobile in different location, and so that enabling aluminum alloy to solution realizes uniformly refining, refining time is 5-10 minutes；
S6, slag hitting carry out slag hitting to aluminium alloy solution using slagging agent after refining every time, after 3-5 slag hitting, by aluminium alloy
Solution temperature is maintained between 740-790 degree, is ready for casting；
Prepare before S7, casting, open the capping of centrifugal casting machine, rotating bar is equipped in centrifugal casting machine, is equipped with sky in rotating bar
The casting mould baked is placed on one end in cavity and fixes mold by chamber, is run through in rotating bar and is equipped with cast tubes, and
One end of cast tubes is corresponding with the casting gate on casting mould, through equipped with quantitative beaker, the lower end of quantitative beaker in capping
Through covering and contradict in the upper end of cast tubes；
S8, casting utilize the aluminium alloy solution in melting furnace with graduated mechanical scoop out of melting furnace to quantitative beaker
Middle conveying aluminium alloy solution, while rotating bar high speed rotation is driven using the driving motor on centrifugal casting machine, pass through cast tubes
Aluminium alloy solution is poured into casting mould with sprue gate, due to getting rid of metal liquid to casting mold
Side wall makes stomata, shrinkage cavity under the effect of the pressure up, to obtain the casting of dense structure, helps and its mechanical performance
It improves；
Casting mould is taken out using manipulator, is put into when temperature is down between 350-450 degree by S9, removal binder
The pond of 50-70 degree carries out the removal of binder and the reduction of temperature, is processed after natural cooling.
2. a kind of casting technique of high density aluminium alloy castings according to claim 1, which is characterized in that the parting compound
It is made of turpentine oil.
3. a kind of casting technique of high density aluminium alloy castings according to claim 1, which is characterized in that the centrifugal casting
Making machine is vertical centrifugal-casting machine.
4. a kind of casting technique of high density aluminium alloy castings according to claim 1, which is characterized in that the quantitative burning
Cup is made of silica material.
5. a kind of casting technique of high density aluminium alloy castings according to claim 1, which is characterized in that the binder
Material be sodium metasilicate.
6. a kind of casting technique of high density aluminium alloy castings according to claim 1, which is characterized in that the slagging agent
It is made of the raw material of following parts by weight：25-45 parts of sodium chloride, 30-50 parts of potassium chloride, 3-7 parts of calcirm-fluoride, 1-6 parts of alchlor,
1-6 parts of Na3AIF, the above proportion is weight fraction ratio.
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Cited By (3)
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| CN115059067A (en) * | 2022-06-16 | 2022-09-16 | 江西丰达新型建材有限公司 | Manufacturing method of pre-tensioning-method prestressed green concrete centrifugal wood-like pile |
| CN115319908A (en) * | 2022-07-15 | 2022-11-11 | 福建龙岩方圆水泥制品有限公司 | Manufacturing method for improving stress of cement electric pole |
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| CN112522565A (en) * | 2020-12-01 | 2021-03-19 | 江苏同生特钢制造有限公司 | Aluminum-zinc alloy ingot casting and production process thereof |
| CN115059067A (en) * | 2022-06-16 | 2022-09-16 | 江西丰达新型建材有限公司 | Manufacturing method of pre-tensioning-method prestressed green concrete centrifugal wood-like pile |
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