CN105537527A - Device for preparing turbine blade by using vacuum rapid smelting - Google Patents

Device for preparing turbine blade by using vacuum rapid smelting Download PDF

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Publication number
CN105537527A
CN105537527A CN201510999792.2A CN201510999792A CN105537527A CN 105537527 A CN105537527 A CN 105537527A CN 201510999792 A CN201510999792 A CN 201510999792A CN 105537527 A CN105537527 A CN 105537527A
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CN
China
Prior art keywords
integral type
temperature alloy
type crucible
high temperature
induction coil
Prior art date
Application number
CN201510999792.2A
Other languages
Chinese (zh)
Inventor
徐维台
孙少纯
刘明明
黄应松
马田厚
赵玉涛
Original Assignee
江苏大学
浙江亚辰新材料科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏大学, 浙江亚辰新材料科技有限公司 filed Critical 江苏大学
Priority to CN201510999792.2A priority Critical patent/CN105537527A/en
Publication of CN105537527A publication Critical patent/CN105537527A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082Sprues, pouring cups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D23/00Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/06Melting-down metal, e.g. metal particles, in the mould

Abstract

The invention relates to the technical field of directional solidification in precise casting of high-temperature alloys, in particular to a device for preparing a turbine blade by using vacuum rapid smelting. The device comprises a special mold shell, a furnace body, an ultrasonic frequency induction coil and a flexible refractory material base; after the special mold shell is heated, a high-temperature alloy block quantitatively calculated in added, and is clamped on the inner wall of an integral crucible sprue cup; the special mold shell is positioned on the flexible refractory material base on a furnace door of the furnace body; the high-temperature alloy is positioned in a magnetic field of the ultrasonic frequency induction coil in the furnace body; the high-temperature alloy is quickly heated and nearly molten instantly under ultrasonic frequency induction heating after vacuuming, and quickly falls along an inner cavity of the integral crucible sprue cup to enter a part module; and through impact of whole falling of liquid metal, the mold filling force can be largely increased, the misrun generation probability is reduced, and the yield is improved.

Description

A kind of device utilizing vacuum fast melting to prepare turbo blade

Technical field

The present invention relates to high temperature alloy precision casting directional solidification technique field, refer in particular to a kind of device utilizing vacuum fast melting to prepare turbo blade.

Background technology

Hot investment casting directional solidification is the thermograde set up in formwork die cavity inside on specific direction, and liquid metal is solidified in turn by certain orientation, to eliminate the transverse grain boundaries solidified on direction, forms column crystal, improves radial performance.

High performance turbine blade adopts the preparation of high temperature alloy directional solidification method, and form column crystal in blade place, it is applied to internal combustion engine turbocharger, greatly can improve engine performance and turbocharger service life.

The shape of turbo blade is very complicated, and leaf margin part thickness is very thin, is usually less than 0.5mm, therefore fills type difficulty when pouring into a mould, and easily form the defects such as misrun, yield rate is lower.

High temperature alloy generally carries out Medium frequency induction melting and cast under vacuum conditions, and vacuum chamber needs to hold the structures such as smelting and pouring, and vacuum chamber volume is relatively excessive, vacuumizes consuming time long; Meanwhile, the melting of application Medium frequency induction, high temperature alloy smelting time is longer, causes productivity ratio lower.

Summary of the invention

The technical problem that the present invention can solve has four:

1, the body of heater volume excessive pumpdown time caused is long, and energy consumption is too high, and production efficiency is low.

2, the shape of turbo blade complexity causes misrun problem serious, and yield rate is low.

3, the longer productivity ratio caused of Medium frequency induction smelting time is lower.

4, in traditional casting process, residual metallic in crucible, cast is splashed, the excessively high high temperature alloy waste caused of rising head.

For overcoming the above problems, the invention provides a kind of device utilizing vacuum fast melting to prepare turbo blade, this device comprises special formwork, body of heater, superaudio induction coil, flexible fire-resistant material base.

Described special formwork is connected to form up and down by integral type crucible cup and part module, integral type crucible cup is tubular, its inner chamber is infundibulate, diameter is up big and down small, there is step excessive between integral type crucible cup and part module, the application of integral type crucible cup, simplify injection system structure, reduce body of heater volume, because this reducing the pumpdown time, enhance productivity, and after making the special formwork after heating enter vacuum chamber, vacuum state can be entered fast, reduce formwork thermal loss.

The preparation method of described special formwork is: integral type crucible cup coordinates with the mould of die head waxes, wherein the bottom of integral type crucible cup is embedded in mold cavity, after waxing terminates, be connected as a single entity bottom the wax-pattern of die head and integral type crucible cup, then assembling turbine blade wax mould on die head, repeats slurry subsequently and is coated with, drenches sand operation until formwork reaches respective thickness; Be coated with in process at slurry, slurry must be made to contact with integral type crucible cup, then through drenching sand operation, make part module and integral type crucible cup connect into entirety.

Described integral type crucible cup is by conventional Al 2o 3pottery is made through injection moulding, sintering.

Described body of heater is made up of upper and lower two parts, top is divided into fixing cylindrical furnace, its inwall installs superaudio induction coil, both sides, cylindrical furnace lower end are provided with vacuum valve and are connected with vavuum pump, bottom is divided into fire door, fire door is arranged on guide rod, is positioned at bottom of furnace body, can be moved up and down by guide rod; Flexible fire-resistant material base is fixed on above fire door, and special formwork is placed in flexible fire-resistant material base, and guide rod drives fire door to rise, and is connected closed with cylindrical furnace bottom.

Adopt asbestos to make at the bottom of described flexible refractory material, certain deformability is arranged at top, can fix special formwork.

Described fire door is connected closed place and is provided with sealing ring with cylindrical furnace bottom.

Described superaudio induction coil, refers to the induction coil of frequency more than 20KHZ; The application of superaudio induction melting, greatly reduce the metal molten time, coordinate the less pumpdown time, the unit period that can will produce, i.e. formwork heating---is added high temperature alloy and---is vacuumized that---fusing is filled type and---solidified the time decreased of---venting---taking-up by 10 minutes, therefore, utilize the special formwork of tunnel type roaster laser heating just most suitable.

Described tunnel type roaster, refer to conventional laggard before go out the combustion type roaster of formula.

Described special formwork is after heating, add the high temperature alloy block quantitatively calculated, high temperature alloy block is stuck in integral type crucible cup inwall, then is placed in by special formwork in the flexible fire-resistant material base on body of heater fire door, and high temperature alloy is in the magnetic field of superaudio induction coil in body of heater; After vacuumizing, under superaudio eddy-current heating, high temperature alloy rapid temperature increases, almost instantaneously fused, then falls rapidly along integral type crucible cup inner chamber, enters part module, impact when utilizing liquid metal entirety to fall, greatly can improve and fill type power, reduce the probability that misrun occurs, improve yield rate.

The computational methods of described quantitative high temperature alloy, adopt volume equal principle, namely the volume of part module is equal with the volume of quantitative high temperature alloy.

Described integral type crucible cup quantification high temperature alloy block is in the magnetic field of superaudio induction coil, coordinating namely by part module height and integral type crucible cup height, integral type crucible cup entirety is within the scope of the induced field of superaudio induction coil, thus guarantees that quantitative high temperature alloy metal derby is in the magnetic field of superaudio induction coil.

In cavity filling process, the flow path of liquid high temperature alloy is more traditional often short, and the high temperature alloy quantitatively calculated is conducive to accurately controlling feeding head height, the accurate control of pouring into a mould, filling type makes the utilization rate of high temperature alloy high, obtains very high finished product recovery rate.

Accompanying drawing explanation

Fig. 1 is part-structure schematic diagram of the present invention, wherein: 1, cylindrical furnace, and 2, superaudio load coil, 3, quantitatively high temperature alloy, 4, integral type crucible cup, 5, part module, 6, vacuum valve, 7, flexible fire-resistant material base, 8, fire door, 9, guide rod.

In said structure, cylindrical furnace 1 is fixed, and fire door 8 moves up and down by guide rod 9, and to reach object that is closed with cylindrical furnace 1 or that open, cylindrical furnace 1 is provided with vacuum valve 6 and is connected with vavuum pump, can take out, put vacuum; Fire door 8 is provided with flexible fire-resistant material base 7, and for placing the special formwork that part module 5 and integral type crucible cup 4 form and the quantitative high temperature alloy 3 of inserting wherein, quantitative high temperature alloy 3 is in the induced field of superaudio load coil 2.

Fig. 2 is the photo of turbo blade prepared by application apparatus of the present invention, applies the operating temperature of turbo blade prepared by device of the present invention, service life neither lower than turbo blade prepared by conventional apparatus.

Detailed description of the invention

Apply device of the present invention and prepare turbo blade, as calculated, part module 5 cumulative volume is 75cm 3, therefore at diameter be 5cm clavate foundry alloy on intercept the long quantitative high temperature alloy 3 pieces for 4cm, integral type crucible cup 4 length is 10cm, the upper and lower diameter of its inner chamber is respectively 7cm, 1.5cm, part module 5 is highly 12cm, repeat to implement after slurry is coated with, drenches the operations such as sand, implement dewaxing, roasting again, the special formwork total height after completing is 24cm, and flexible fire-resistant material base 7 is highly 3cm, superaudio induction coil about 2 is respectively 27cm, 15cm, so whole integral type crucible cup 4 is all in the magnetic field range of superaudio induction coil 2 along apart from fire door height, the special formwork be made up of integral type crucible cup 4 and part module 5 is taken out from tunnel type roaster, add the high temperature alloy 3 pieces quantitatively calculated, be placed in flexible fire-resistant material base 7, then fire door 8 rises closed with cylindrical furnace 1 along guide rail 9, vavuum pump is vacuumized by vacuum valve 6, when vacuum reaches 0.1Pa, open superaudio induction coil 2 to heat, high temperature alloy 3 pieces of rapid temperature increases, almost instantaneously fused, and fall along the inner chamber of integral type crucible cup 4, rush in the inner chamber of part module 5, then treat that metal fills type, solidify, open vacuum valve 6, recover normal pressure, blow-on door 8, take out special formwork, again through shake shell, cutting, take off turbo blade part.

Turbo blade yield rate can be increased to 85% from traditional 60% by device of the present invention, recovery rate (using rate of metal) from traditional instability, mean value about 50% is increased to stable 80%, the production cycle foreshortened to 10 minutes by traditional 35 minutes.

Finally it should be noted that structure of the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in protection scope of the present invention.

Claims (10)

1. utilize vacuum fast melting to prepare a device for turbo blade, it is characterized in that: described device comprises special formwork, body of heater, superaudio induction coil, flexible fire-resistant material base;
Described body of heater is made up of upper and lower two parts, top is divided into fixing cylindrical furnace, its inwall installs superaudio induction coil, both sides, cylindrical furnace lower end are provided with vacuum valve and are connected with vavuum pump, bottom is divided into fire door, fire door is arranged on guide rod, is positioned at bottom of furnace body, can be moved up and down by guide rod; Flexible fire-resistant material base is fixed on above fire door, and special formwork is placed in flexible fire-resistant material base, and guide rod drives fire door to rise, and is connected closed with cylindrical furnace bottom;
Described special formwork is connected to form up and down by integral type crucible cup and part module, integral type crucible cup is tubular, its inner chamber is infundibulate, diameter is up big and down small, there is step excessive between integral type crucible cup and part module, the application of integral type crucible cup, simplify injection system structure, reduce body of heater volume, because this reducing the pumpdown time, enhance productivity, and after making the special formwork after heating enter vacuum chamber, vacuum state can be entered fast, reduce formwork thermal loss.
2. a kind of device utilizing vacuum fast melting to prepare turbo blade as claimed in claim 1, it is characterized in that the preparation method of described special formwork is: integral type crucible cup coordinates with the mould of die head waxes, wherein the bottom of integral type crucible cup is embedded in mold cavity, after waxing terminates, be connected as a single entity bottom the wax-pattern of die head and integral type crucible cup, then assembling turbine blade wax mould on die head, repeats slurry subsequently and is coated with, drenches sand operation until formwork reaches respective thickness; Be coated with in process at slurry, slurry must be made to contact with integral type crucible cup, then through drenching sand operation, make part module and integral type crucible cup connect into entirety.
3. a kind of device utilizing vacuum fast melting to prepare turbo blade as claimed in claim 1 or 2, is characterized in that: described integral type crucible cup is by conventional Al 2o 3pottery is made through injection moulding, sintering.
4. a kind of device utilizing vacuum fast melting to prepare turbo blade as claimed in claim 1, is characterized in that: adopt asbestos to make at the bottom of described flexible refractory material, certain deformability is arranged at top, can fix special formwork.
5. a kind of device utilizing vacuum fast melting to prepare turbo blade as claimed in claim 1, is characterized in that: described fire door is connected closed place and is provided with sealing ring with cylindrical furnace bottom.
6. a kind of device utilizing vacuum fast melting to prepare turbo blade as claimed in claim 1, is characterized in that: described superaudio induction coil, refers to the induction coil of frequency more than 20KHZ; The application of superaudio induction melting, greatly reduce the metal molten time, coordinate the less pumpdown time, the unit period that can produce, i.e. formwork heating and---add high temperature alloy and---vacuumize that---fusing is filled type and---solidified the time decreased of---venting---taking-up by 10 minutes.
7. utilize device as claimed in claim 1 to prepare the method for turbo blade, it is characterized in that: described special formwork is after heating, add the high temperature alloy block quantitatively calculated, high temperature alloy block is stuck in integral type crucible cup inwall, be placed in by special formwork in the flexible fire-resistant material base on body of heater fire door, high temperature alloy is in the magnetic field of superaudio induction coil in body of heater again; After vacuumizing, under superaudio eddy-current heating, high temperature alloy rapid temperature increases, almost instantaneously fused, then falls rapidly along integral type crucible cup inner chamber, enters part module, impact when utilizing liquid metal entirety to fall, greatly can improve and fill type power, reduce the probability that misrun occurs, improve yield rate.
8. method as claimed in claim 7, is characterized in that: described special formwork adopts the heating of tunnel type roaster.
9. method as claimed in claim 7, is characterized in that: the computational methods of described quantitative high temperature alloy, and adopt volume equal principle, namely the volume of part module is equal with the volume of quantitative high temperature alloy.
10. method as claimed in claim 7, it is characterized in that: described integral type crucible cup quantification high temperature alloy block is in the magnetic field of superaudio induction coil, coordinating namely by part module height and integral type crucible cup height, integral type crucible cup entirety is within the scope of the induced field of superaudio induction coil, thus guarantees that quantitative high temperature alloy metal derby is in the magnetic field of superaudio induction coil.
CN201510999792.2A 2015-12-28 2015-12-28 Device for preparing turbine blade by using vacuum rapid smelting CN105537527A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105618689A (en) * 2016-01-25 2016-06-01 江苏大学 Device for manufacturing turbine blade through rapid vacuum melting
CN109332594A (en) * 2018-11-20 2019-02-15 沈阳航发精密铸造有限公司 A kind of anti-connection method for being mingled with sprue cup of heavy castings

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178986A (en) * 1978-03-31 1979-12-18 General Electric Company Furnace for directional solidification casting
EP0183242A1 (en) * 1984-11-28 1986-06-04 Schutz- Dental Gmbh Device for melting material and introducing it
JPH0494860A (en) * 1990-08-10 1992-03-26 Daido Steel Co Ltd Method and device for melting and casting metal
CN1089530A (en) * 1992-12-30 1994-07-20 希钦拿制造有限公司 Produce the method and apparatus of intermetallic castings
CN1593813A (en) * 2004-06-25 2005-03-16 哈尔滨工业大学 Investment casting ceramic mould shell containing filter of golf head and manufacturing method thereof
CN102407338A (en) * 2011-12-06 2012-04-11 中南大学 Gas atomization device for preparing superfine spherical metal powder with low oxygen content
US20130277007A1 (en) * 2012-04-20 2013-10-24 Fs Precision Tech Single piece casting of reactive alloys

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178986A (en) * 1978-03-31 1979-12-18 General Electric Company Furnace for directional solidification casting
EP0183242A1 (en) * 1984-11-28 1986-06-04 Schutz- Dental Gmbh Device for melting material and introducing it
JPH0494860A (en) * 1990-08-10 1992-03-26 Daido Steel Co Ltd Method and device for melting and casting metal
CN1089530A (en) * 1992-12-30 1994-07-20 希钦拿制造有限公司 Produce the method and apparatus of intermetallic castings
CN1593813A (en) * 2004-06-25 2005-03-16 哈尔滨工业大学 Investment casting ceramic mould shell containing filter of golf head and manufacturing method thereof
CN102407338A (en) * 2011-12-06 2012-04-11 中南大学 Gas atomization device for preparing superfine spherical metal powder with low oxygen content
US20130277007A1 (en) * 2012-04-20 2013-10-24 Fs Precision Tech Single piece casting of reactive alloys

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105618689A (en) * 2016-01-25 2016-06-01 江苏大学 Device for manufacturing turbine blade through rapid vacuum melting
CN109332594A (en) * 2018-11-20 2019-02-15 沈阳航发精密铸造有限公司 A kind of anti-connection method for being mingled with sprue cup of heavy castings

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Application publication date: 20160504