CN109434081A - Device for directionally solidifying, method and the Casting Equipment of single crystal casting - Google Patents
Device for directionally solidifying, method and the Casting Equipment of single crystal casting Download PDFInfo
- Publication number
- CN109434081A CN109434081A CN201811316668.1A CN201811316668A CN109434081A CN 109434081 A CN109434081 A CN 109434081A CN 201811316668 A CN201811316668 A CN 201811316668A CN 109434081 A CN109434081 A CN 109434081A
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- Prior art keywords
- casting
- single crystal
- hot cell
- chassis
- formwork
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Classifications
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
- B22D27/045—Directionally solidified castings
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The present invention relates to single crystal casting casting technology fields, disclose device for directionally solidifying, method and the Casting Equipment of a kind of single crystal casting.The device for directionally solidifying of the single crystal casting, including hot cell, cold house, lifting platform and chassis, casting formwork arranged in parallel is mounted on the chassis, the lifting platform is for driving the casting formwork being placed on the chassis mobile to be oriented solidification from the hot cell to cold house.The present invention passes through the closed configuration in hot cell and cold house, the case where avoiding loss amount of heat between hot cell and cold house, temperature gradient is not high and leading to generation stray crystal defect and freckle defect, casting formwork arranged in parallel can be made full symmetric and under the same conditions heated and cooled down simultaneously, interior outside temperature strip part improves the yields and quality of single crystal casting unevenly the case where shadow region generates casting defect when avoiding existing single crystal casting heating with cooled and solidified.
Description
Technical field
The present invention relates to single crystal casting casting technology field more particularly to a kind of device for directionally solidifying of single crystal casting, side
Method and Casting Equipment.
Background technique
Single crystal casting is all circular row in the device for directionally solidifying of existing single crystal casting, single crystal casting in inside and
The heat transfer boundary condition in outside is asymmetric, is easy to form casting defect because of shadow effect in inside shadow region, while existing orientation is solidifying
It is fixedly mounted with the through structure for setting cold and hot chamber, can be lost amount of heat keeps temperature gradient not high and generate stray crystal defect and freckle and lack
It falls into, causes the yields of existing single crystal casting and quality bad.
Summary of the invention
In consideration of it, the present invention provides device for directionally solidifying, method and the Casting Equipment of a kind of single crystal casting, solve existing
The device for directionally solidifying of single crystal casting is because single crystal casting is in the heat transfer boundary condition asymmetry of inner side and outer side and the perforation of cold and hot chamber
Formula structure leads to the yields of single crystal casting and the bad technical problem of quality.
According to one embodiment of present invention, a kind of device for directionally solidifying of single crystal casting is provided, the single crystal casting
Device for directionally solidifying includes hot cell, cold house, lifting platform and chassis, and casting formwork arranged in parallel, institute are mounted on the chassis
Lifting platform is stated for driving the casting formwork being placed on the chassis solidifying to be oriented from the hot cell to cold house's movement
Gu.
Preferably, water-cooling system is additionally provided in the chassis.
Preferably, the hot cell and cold house are separated by thermal insulation board, and opening is provided on the thermal insulation board, described heat-insulated
The opening broadside size of plate is slightly larger than the correspondingly-sized of casting formwork.
Preferably, the opening of the thermal insulation board is set as rectangle.
Preferably, the opening of the thermal insulation board is arranged in the thermal insulation board center.
According to a further embodiment of the invention, a kind of directional freeze method of single crystal casting is also provided, comprising: provide one
The device for directionally solidifying of the above-mentioned single crystal casting of kind；Casting formwork arranged in parallel is placed on chassis；The bottom of in hot cell
Casting formwork on disk is preheated and is poured；Control lifting platform, which moves down, drives casting formwork to enter cold house from hot cell, with
Realize the monocrystalline directional solidification of casting.
Preferably, the directional freeze method of the single crystal casting, further includes: according to the design shape ruler of single crystal casting
Very little formation casting wax mould simultaneously carries out straight parallel column assembling；By carrying out multiple mucilage to the casting wax mould of assembling arranged in parallel
It drenches sand and forms ceramic shell mould；And it is dewaxed and is roasted to ceramic shell mould.
Device for directionally solidifying, method and the Casting Equipment of single crystal casting provided by the invention, including hot cell, cold house, lifting
Platform and chassis, casting formwork arranged in parallel is mounted on the chassis, and the lifting platform is placed in the chassis for driving
On casting formwork it is mobile to be oriented solidification from the hot cell to cold house.The present invention is closed by hot cell and cold house
Configuration, avoid between hot cell and cold house be lost amount of heat, temperature gradient is unobvious and leads to stray crystal defect and freckle defect
The case where, while casting formwork arranged in parallel can be made to avoid full symmetric and under the same conditions heated and cooled down
Interior outside temperature strip part unevenly generates the feelings of casting defect in shadow region when existing single crystal casting heating and cooled and solidified
Condition improves the yields and quality of single crystal casting.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, required in being described below to embodiment
The attached drawing used is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the longitudinal cross-section structural schematic diagram of the device for directionally solidifying of single crystal casting in one embodiment of the invention.
Fig. 2 is the transversal cross-section structural schematic diagram of the device for directionally solidifying of single crystal casting in one embodiment of the invention.
Fig. 3 is the flow diagram of the directional freeze method of single crystal casting in another embodiment of the invention.
Fig. 4 is the flow diagram of the directional freeze method of single crystal casting in further embodiment of the present invention.
Specific embodiment
Further more detailed description is made to technical solution of the present invention with reference to the accompanying drawings and detailed description.It is aobvious
So, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other implementation obtained without making creative work
Example, all should belong to the scope of protection of the invention.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In the description of the present invention, it should be noted that unless otherwise specific rule
Fixed and restriction, term " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, centre can also be passed through
Medium is indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood in this hair in conjunction with concrete condition
Concrete meaning in bright.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two with
On.
Any process described otherwise above or method description are construed as in flow chart or herein, indicate packet
Include it is one or more for realizing specific logical function or process the step of the module of code of executable instruction, segment or
Part, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed
Sequentially, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be by this
The embodiment person of ordinary skill in the field of invention is understood.
Referring to Fig. 1 and Fig. 2, the device for directionally solidifying 100 of the single crystal casting, including hot cell 1, heater 2, cold house 3,
Cooler 4, thermal insulation board 5, lifting platform and chassis 6.
In the present embodiment, the hot cell 1 and cold house 3 are separated by about 5 thermal insulation board, and the heater 2 is arranged
On 1 inner wall of hot cell.The heater 2 can be heated to preset temperature to the hot cell 1 and casting formwork 7, in order to
Alloy liquid is poured casting formwork 7.The cooler 4 is water cooling plant, can be to the casting entered in the cold house 3
Formwork 7 is cooled down.
5 center of thermal insulation board is provided with opening 51, and the opening 51 is in rectangle, and broadside size is slightly larger than casting
The corresponding size of part formwork 7, the casting formwork 7 can be just passed through the opening 51, the casting formwork 7 and institute when passing through
The gap stated between opening 51 is very small, so that the hot cell 1 and cold house 3 is formed relatively good isolation, avoids the hot cell 1
Large area is connected between cold house 3 and to be lost amount of heat, temperature gradient not high and lead to the feelings of stray crystal defect and freckle defect
Condition improves the yields and quality of single crystal casting.
The opening 51 of thermal insulation board 5 described in 3 bottom of cold house and face is arranged in the lifting platform, and the chassis 6 is arranged
At the top of the lifting platform.The lifting platform includes transmission mechanism, and it is described that the transmission mechanism can drive the chassis 6 to pass through
The opening 51 of thermal insulation board 5 vertically moves in the hot cell 1 and cold house 3.It is provided with water-cooling system in the chassis 6, with
Strengthen the cooling effect of the casting.
In the present embodiment, 6 surface of chassis is mounted with casting formwork 7 arranged in parallel, and the lifting platform can drive
The casting formwork 7 being placed on the chassis 6 passes through the opening 51 and is moved to the cold house 3 from the hot cell 1, makes parallel
The casting formwork 7 of arrangement avoids existing single crystal casting heating full symmetric and under the same conditions heated and cooled down
Interior outside temperature strip part improves single crystal casting unevenly the case where shadow region generates casting defect when with cooled and solidified
Yields and quality.
Referring to Fig. 3, it is based on the said goods embodiment, another embodiment of the invention also provides a kind of determining for single crystal casting
To clotting method.The directional freeze method of the single crystal casting, comprising:
Step S101: a kind of device for directionally solidifying of single crystal casting is provided.
Referring to Fig. 1, in the present embodiment the device for directionally solidifying 100 of the single crystal casting include hot cell 1, heater 2,
Cold house 3, cooler 4, thermal insulation board 5, lifting platform and chassis 6.
5 center of thermal insulation board is provided with opening 51, and the opening 51 is in rectangle, and broadside size is slightly larger than casting
The corresponding size of part formwork 7, the casting formwork 7 can be just passed through the opening 51, the casting formwork 7 and institute when passing through
The gap stated between opening 51 is very small, makes to form preferable isolation between the hot cell 1 and cold house 3, avoids the hot cell
1 loss amount of heat, temperature gradient is unobvious and the case where lead to stray crystal defect and freckle defect, improve single crystal casting
Yields and quality.
Casting formwork 7 arranged in parallel is mounted on the chassis 6, the lifting platform, which can drive, is placed in the chassis 6
On casting formwork 7 pass through the opening and 51 be moved to the cold house 3 from the hot cell 1, make casting formwork 7 arranged in parallel
Full symmetric and under the same conditions exchange heat, avoid existing single crystal casting heating and it is cooling when interior outside temperature strip
Part improves the yields and quality of single crystal casting unevenly and the case where shadow region generates casting defect.
Step S102: casting formwork arranged in parallel is placed on chassis.
Step S103: the casting formwork on chassis is preheated and is poured in hot cell.
Step S104: control lifting platform, which moves down, drives casting formwork to enter cold house from hot cell, to realize the list of casting
Brilliant directional solidification.
In the present embodiment, ready-made casting formwork 7 arranged in parallel is placed on chassis 6, in hot cell 1
Formwork is preheated by heater 2, the casting formwork 7 on chassis 6 is poured, control lifting platform moves down drive casting
Formwork 7 enters cold house 3 from hot cell 1, makes casting formwork 7 arranged in parallel full symmetric and under the same conditions cooled down,
Interior outside temperature strip part unevenly generates casting defect in shadow region when avoiding existing single crystal casting heating and cooled and solidified
Situation improves the yields and quality of single crystal casting.
Referring to fig. 4, in another embodiment of the invention, the directional freeze method of the single crystal casting, comprising:
Step S201: casting wax mould is formed according to the design shape size of single crystal casting and carries out straight parallel column assembling.
Step S202: sand formation ceramic shell mould is drenched by carrying out multiple mucilage to the casting wax mould of assembling arranged in parallel.
Step S203: it is dewaxed and is roasted to ceramic shell mould.
Step S204: a kind of device for directionally solidifying of single crystal casting is provided.
Step S205: casting formwork arranged in parallel is placed on chassis.
Step S206: the casting formwork on chassis is preheated and is poured in hot cell.
Step S207: control lifting platform, which moves down, drives casting formwork to enter cold house from hot cell, to realize the list of casting
Brilliant directional solidification.
In the present embodiment, casting wax mould is first formed according to the design shape size of single crystal casting and carries out straight parallel column
Then formula assembling drenches sand formation ceramic shell mould by carrying out multiple mucilage to assembled casting wax mould arranged in parallel, and to pottery
Ceramic former shell is dewaxed and is roasted, and is being poured with after cooled and solidified, also to single crystal casting removing type core, and is being carried out defect inspection
It surveys, conveniently and efficiently realizes the casting and final single crystal casting subsequent processing and defects detection of single crystal casting, improve list
The yields and quality of brilliant casting.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The descriptions such as example " or " some examples " mean particular features, structures, materials, or characteristics described in conjunction with this embodiment or example
It is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are different
Surely identical embodiment or example is referred to.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in one or more embodiment or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective,
The scope of the present invention is defined by the claims and their equivalents.
Claims (7)
1. a kind of device for directionally solidifying of single crystal casting, which is characterized in that including hot cell, cold house, lifting platform and chassis, the bottom
Casting formwork arranged in parallel is mounted on disk, the lifting platform is for driving the casting formwork being placed on the chassis from institute
It is mobile to be oriented solidification to cold house to state hot cell.
2. the device for directionally solidifying of single crystal casting according to claim 1, which is characterized in that be additionally provided in the chassis
Water-cooling system.
3. the device for directionally solidifying of single crystal casting according to claim 1, which is characterized in that the hot cell and cold house pass through
Thermal insulation board separates, and opening is provided on the thermal insulation board, and the opening broadside size of the thermal insulation board is slightly larger than pair of casting formwork
Answer size.
4. the device for directionally solidifying of single crystal casting according to claim 3, which is characterized in that the opening of the thermal insulation board is set
It is set to rectangle.
5. the device for directionally solidifying of single crystal casting according to claim 3, which is characterized in that the opening of the thermal insulation board is set
It sets in the thermal insulation board center.
6. a kind of directional freeze method of single crystal casting characterized by comprising
A kind of device for directionally solidifying of single crystal casting as described in claim 1 is provided；
Casting formwork arranged in parallel is placed on chassis；
The casting formwork on chassis is preheated and is poured in hot cell；And
Control lifting platform, which moves down, drives casting formwork to enter cold house from hot cell, to realize the monocrystalline directional solidification of casting.
7. the directional freeze method of single crystal casting according to claim 6, which is characterized in that further include:
Casting wax mould is formed according to the design shape size of single crystal casting and carries out straight parallel column assembling；
Sand formation ceramic shell mould is drenched by carrying out multiple mucilage to the casting wax mould of assembling arranged in parallel；And
It is dewaxed and is roasted to ceramic shell mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811316668.1A CN109434081A (en) | 2018-11-07 | 2018-11-07 | Device for directionally solidifying, method and the Casting Equipment of single crystal casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811316668.1A CN109434081A (en) | 2018-11-07 | 2018-11-07 | Device for directionally solidifying, method and the Casting Equipment of single crystal casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109434081A true CN109434081A (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811316668.1A Pending CN109434081A (en) | 2018-11-07 | 2018-11-07 | Device for directionally solidifying, method and the Casting Equipment of single crystal casting |
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| CN (1) | CN109434081A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257898A (en) * | 2019-07-15 | 2019-09-20 | 泰州市金鹰精密铸造有限公司 | Vacuum drying oven based on graphene particles directional solidification single crystal blade |
| CN111922322A (en) * | 2020-07-28 | 2020-11-13 | 深圳市万泽中南研究院有限公司 | Directional solidification device and casting method |
| CN112553682A (en) * | 2020-11-19 | 2021-03-26 | 西安交通大学 | Parallel heating and cooling device for directional solidification casting of single crystal blade |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895672A (en) * | 1973-12-26 | 1975-07-22 | United Aircraft Corp | Integrated furnace method and apparatus for the continuous production of individual castings |
| GB2110299A (en) * | 1981-11-03 | 1983-06-15 | Rolls Royce | I.C. engine poppet valve |
| US4409451A (en) * | 1981-08-31 | 1983-10-11 | United Technologies Corporation | Induction furnace having improved thermal profile |
| US4469161A (en) * | 1981-12-23 | 1984-09-04 | Rolls-Royce Limited | Method of and mould for making a cast single crystal |
| JPS6040664A (en) * | 1983-08-12 | 1985-03-04 | Agency Of Ind Science & Technol | Production of unidirectionally solidified crystal |
| CN103147120A (en) * | 2013-04-01 | 2013-06-12 | 东方电气集团东方汽轮机有限公司 | Directional solidification device of high-temperature alloy |
| CN103147117A (en) * | 2013-04-01 | 2013-06-12 | 东方电气集团东方汽轮机有限公司 | Directional solidification device of a high-temperature alloy and use method thereof |
| EP1502679B1 (en) * | 2003-07-30 | 2014-01-01 | Alstom Technology Ltd | Method for casting a directionally solidified or single crystal article |
| DE102014113806A1 (en) * | 2014-03-07 | 2015-09-10 | Ald Vacuum Technologies Gmbh | Method and device for producing DS / SC castings |
-
2018
- 2018-11-07 CN CN201811316668.1A patent/CN109434081A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895672A (en) * | 1973-12-26 | 1975-07-22 | United Aircraft Corp | Integrated furnace method and apparatus for the continuous production of individual castings |
| US4409451A (en) * | 1981-08-31 | 1983-10-11 | United Technologies Corporation | Induction furnace having improved thermal profile |
| GB2110299A (en) * | 1981-11-03 | 1983-06-15 | Rolls Royce | I.C. engine poppet valve |
| US4469161A (en) * | 1981-12-23 | 1984-09-04 | Rolls-Royce Limited | Method of and mould for making a cast single crystal |
| JPS6040664A (en) * | 1983-08-12 | 1985-03-04 | Agency Of Ind Science & Technol | Production of unidirectionally solidified crystal |
| EP1502679B1 (en) * | 2003-07-30 | 2014-01-01 | Alstom Technology Ltd | Method for casting a directionally solidified or single crystal article |
| CN103147120A (en) * | 2013-04-01 | 2013-06-12 | 东方电气集团东方汽轮机有限公司 | Directional solidification device of high-temperature alloy |
| CN103147117A (en) * | 2013-04-01 | 2013-06-12 | 东方电气集团东方汽轮机有限公司 | Directional solidification device of a high-temperature alloy and use method thereof |
| DE102014113806A1 (en) * | 2014-03-07 | 2015-09-10 | Ald Vacuum Technologies Gmbh | Method and device for producing DS / SC castings |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257898A (en) * | 2019-07-15 | 2019-09-20 | 泰州市金鹰精密铸造有限公司 | Vacuum drying oven based on graphene particles directional solidification single crystal blade |
| CN111922322A (en) * | 2020-07-28 | 2020-11-13 | 深圳市万泽中南研究院有限公司 | Directional solidification device and casting method |
| CN112553682A (en) * | 2020-11-19 | 2021-03-26 | 西安交通大学 | Parallel heating and cooling device for directional solidification casting of single crystal blade |
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Application publication date: 20190308 |