CN106825505B - A kind of vacuum casting method of nickel base superalloy ingot casting - Google Patents
A kind of vacuum casting method of nickel base superalloy ingot casting Download PDFInfo
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- CN106825505B CN106825505B CN201611268089.5A CN201611268089A CN106825505B CN 106825505 B CN106825505 B CN 106825505B CN 201611268089 A CN201611268089 A CN 201611268089A CN 106825505 B CN106825505 B CN 106825505B
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- mold
- temperature gradient
- copper plate
- cooled copper
- water cooled
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of vacuum casting methods of nickel base superalloy, including mold, mold bottom is equipped with water cooled copper plate, there is circulating cooling aquaporin in water cooled copper plate, make the longitudinal temperature gradient of melt composition one from bottom to top, mold first while and side is equipped with water mist cold spray head when second, third while and corner connection when the 4th be equipped with resistance heating body, make melt composition one transverse temperature gradient from side to the other side, above longitudinal temperature gradient and transverse temperature form an oblique temperature gradient, make solid liquid interface from first while and when second junction bottom to third while and the top of junction promotes when the 4th, final solidified position be located at third while and when the 4th near junction, shrinkage cavity shrinkage porosity is concentrated on this.
Description
Technical field
The invention belongs to materials processing technology fields, more particularly, to a kind of vacuum pressing and casting of nickel base superalloy ingot casting ingot
Method.
Background technique
Nickel base superalloy is that have unusual yield strength-temperature effect and very high wear-resistant and corrosion resistance
Can, have become the important feature material in the fields such as contemporary aerospace industry, civilian industry, especially in aero-engine leaf
Piece field has broad application prospects.A kind of quick shaping process of 3D printing or increasing material manufacturing as rising in recent years,
Using layer-by-layer powdering, laser or electron beam melt molding mode, realize the finishing molding of precise part, and avoid
The defects of shrinkage cavity shrinkage porosity that casting process occurs, becomes a kind of emerging material manufacturing process.
Powder used in 3D printing at present is generally simultaneously used by vacuum pouring after melting at ingot casting, subsequent secondary smelting
The mode of atomization legal system powder obtains, and in vacuum melting and casting process, melting is protected usually in vacuum induction melting furnace
It is poured into mold after temperature, is put into induction furnace due to needing to undergo after mold preheating, vacuumizes, melting, the processes such as casting, temperature
It can decline, while alloy pig center is easy to appear shrinkage cavity, the problems such as gross segregation, cause ingot casting utilization rate to decline, and rear
In continuous cutting process, attachment dirt is easy in shrinkage cavity, and be difficult to clean off, thus find a kind of reductions ingot casting shrinkage cavity and avoid and
The casting method of mold reaction has great importance.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of vacuum casting methods of nickel base superalloy.
The complete technical solution of the present invention includes:
A kind of vacuum casting method of nickel base superalloy, includes the following steps, induction melting furnace is closed, and sealing is taken out true
Sky opens induction heating method and carries out fused when heated metal, and smelting temperature is 1800-1850 DEG C, keeps the temperature 5- after being completely melt
It is poured after 10min, metal bath flows into mold；
The mold height is 50-60cm, and mold cross section is rectangle, having a size of 25cm*25cm, including is sequentially connected
First while, second while, third while and when the 4th, mold bottom is equipped with water cooled copper plate, has recirculated cooling water logical in water cooled copper plate
Road, first while and side is equipped with water mist cold spray head when second, first while and junction is round-corner transition when second, third side and the
The corner connection on four sides is equipped with resistance heating body；
After metal bath pours into mold, the water cooled copper plate of mold bottom cools down mold in bottom, and cooling water inflow is
20L/min, makes the longitudinal temperature gradient of melt composition one from bottom to top, the cold spray head of water mist to the first of mold while and when second
Cooled down, atomisation pressure 0.1-0.15Mpa, resistance heating body to third while and corner connection when the 4th heat, electricity
Hindering heating temperature is 600-800 DEG C, makes melt composition one transverse temperature gradient from side to the other side,
After solidification, demoulding is taken out, excision third while and when the 4th edge part, obtain alloy cast ingot.
The alloy compositions selected to include Al:20-30%, Cr:2-2.8%, Nb:1.5-2.5% by atomic percent,
Re:0.2-0.8%, surplus Ni.
The present invention compared with the existing technology the advantages of be:
The production of ingot casting generally uses cylindrical ingot in the prior art, partially makes it by the way of through bottom coohng
The problem of solidification, aforesaid way is brought is that final solidified position is located at ingot casting center, forms the shrinkage cavity shrinkage porosity along ingot casting axis, on
It states shrinkage cavity shrinkage porosity and brings very big trouble in following process process, need to cut along axis, then cut off shrinkage cavity part, this hair
Bright to be cooled down by designing rectangular ingot casting using bottom and two sides, in addition the mode of two sides heat preservation, forms slanting temperature ladder
Degree, final solidified position concentrates on the edge of two sides, avoids the shrinkage cavity at center, only need to be performed in following process
Primary cutting, improves ingot casting utilization rate and production efficiency.
Detailed description of the invention
Fig. 1 is casting mould front view used in the present invention.
Fig. 2 is casting mould top view used in the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
The alloy compositions selected to include Al:20-30%, Cr:2-2.8%, Nb:1.5-2.5% by atomic percent,
Re:0.2-0.8%, surplus Ni.
A kind of vacuum casting method of nickel base superalloy ingot casting, induction melting furnace is closed, and sealing is evacuated down to 10-3-
10-4Pa opens induction heating method and carries out fused when heated alloy, heating power 250-300KW, smelting temperature 1800-
It 1850 DEG C, is poured after keeping the temperature 5-10min after being completely melt, metal bath flows into mold 1；
The mold height is 50-60cm, and mold cross section is rectangle, having a size of 25cm*25cm, including is sequentially connected
First 5 while at 2, second, 3, third is in 4 and the 4th, mold bottom is equipped with water cooled copper plate 6, has circulating cooling in water cooled copper plate
Water channel 7, the circulating cooling aquaporin are maze-type structure, first while and side is equipped with the cold spray head 8 of water mist, the first side when second
Be round-corner transition with the second side junction, third while and corner connection when the 4th be equipped with resistance heating body 9, the resistance heating
Body is to be cut into fan-shaped burner hearth, embeds resistance furnace silk, and resistance wire connects power supply, and turning of face third while with the 4th connects
Place.
After metal bath pours into mold, the water cooled copper plate of mold bottom cools down mold in bottom, and cooling water inflow is
20L/min, makes the longitudinal temperature gradient of melt composition one from bottom to top, the cold spray head of water mist to the first of mold while and when second
Cooled down, atomisation pressure 0.1-0.15Mpa, resistance heating body to third while and corner connection when the 4th heat, make
Melt composition one transverse temperature gradient from side to the other side, resistance heating temperature are 600-800 DEG C,
Above longitudinal temperature gradient and transverse temperature form an oblique temperature gradient, make solid liquid interface from the first side and
Second promotes when the bottom of junction is to third with the top of the 4th side junction, and final solidified position is located at third side and the
Near four sides junction, shrinkage cavity shrinkage porosity is concentrated on this.
Setting time is 4-5min, and after solidification, demoulding is taken out, excision third while and when the 4th edge part,
Obtain alloy cast ingot.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (2)
1. a kind of vacuum casting method of nickel base superalloy, includes the following steps, induction melting furnace is closed, sealing is taken out true
Sky carries out fused when heated metal using induction heating method, and smelting temperature is 1800-1850 DEG C, keeps the temperature 5- after being completely melt
It is poured after 10min, metal bath flows into mold；
The mold height is 50-60cm, and mold cross section is rectangle, having a size of 25cm*25cm, including sequentially connected the
On one side, second it is equipped with water cooled copper plate, has circulating cooling aquaporin in water cooled copper plate with the 4th side, mold bottom in, third, the
On one side and the second side side is equipped with the cold spray head of water mist, first while and junction is round-corner transition when second, third while and when the 4th
Corner connection be equipped with resistance heating body；
After metal bath pours into mold, the water cooled copper plate of mold bottom cools down mold in bottom, cooling water inflow 20L/
Min, makes the longitudinal temperature gradient of melt composition one from bottom to top, the cold spray head of water mist to the first of mold while and second while carry out
It is cooling, atomisation pressure 0.1-0.15Mpa, resistance heating body to third while and corner connection when the 4th heat, resistance adds
Hot temperature is 600-800 DEG C, makes melt composition one transverse temperature gradient from side to the other side,
After solidification, demoulding is taken out, excision third while and when the 4th edge part, obtain alloy cast ingot.
2. method described in claim 1, which is characterized in that the alloy compositions selected is include Al:20- by atomic percent
30%, Cr:2-2.8%, Nb:1.5-2.5%, Re:0.2-0.8%, surplus Ni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611268089.5A CN106825505B (en) | 2016-12-31 | 2016-12-31 | A kind of vacuum casting method of nickel base superalloy ingot casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611268089.5A CN106825505B (en) | 2016-12-31 | 2016-12-31 | A kind of vacuum casting method of nickel base superalloy ingot casting |
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| Publication Number | Publication Date |
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| CN106825505A CN106825505A (en) | 2017-06-13 |
| CN106825505B true CN106825505B (en) | 2019-04-02 |
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| CN201611268089.5A Active CN106825505B (en) | 2016-12-31 | 2016-12-31 | A kind of vacuum casting method of nickel base superalloy ingot casting |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107574337B (en) * | 2017-08-03 | 2019-07-23 | 上海交通大学 | A kind of Ni-Al-RE ternary eutectic alloy and preparation method thereof |
| CN111203521B (en) * | 2020-01-09 | 2020-12-25 | 上海大学 | Annular ingot casting equipment and casting method thereof |
| CN112410618B (en) * | 2020-11-19 | 2021-10-22 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Preparation method of GH4698 high-temperature alloy die |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422716A (en) * | 2000-06-07 | 2003-06-11 | 三菱综合材料株式会社 | Method and apparatus for making copper and/or copper alloy ingot bar with smooth surface and without contraction cavities |
| JP2004181475A (en) * | 2002-11-29 | 2004-07-02 | Nachi Fujikoshi Corp | Magnesium alloy ingot and its manufacturing method |
| KR20110076571A (en) * | 2009-12-29 | 2011-07-06 | 주식회사 포스코 | Method and mold for casting large steel ingot |
| CN202639263U (en) * | 2012-05-14 | 2013-01-02 | 王召祥 | Invisible riser for ingot casting and temperature gradient ingot casting mold |
| CN106180659A (en) * | 2016-08-30 | 2016-12-07 | 烟台万隆真空冶金股份有限公司 | A kind of strand directional solidification and the Combined water chill mould of regional choice cooling |
-
2016
- 2016-12-31 CN CN201611268089.5A patent/CN106825505B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422716A (en) * | 2000-06-07 | 2003-06-11 | 三菱综合材料株式会社 | Method and apparatus for making copper and/or copper alloy ingot bar with smooth surface and without contraction cavities |
| JP2004181475A (en) * | 2002-11-29 | 2004-07-02 | Nachi Fujikoshi Corp | Magnesium alloy ingot and its manufacturing method |
| KR20110076571A (en) * | 2009-12-29 | 2011-07-06 | 주식회사 포스코 | Method and mold for casting large steel ingot |
| CN202639263U (en) * | 2012-05-14 | 2013-01-02 | 王召祥 | Invisible riser for ingot casting and temperature gradient ingot casting mold |
| CN106180659A (en) * | 2016-08-30 | 2016-12-07 | 烟台万隆真空冶金股份有限公司 | A kind of strand directional solidification and the Combined water chill mould of regional choice cooling |
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| CN106825505A (en) | 2017-06-13 |
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Effective date of registration: 20190307 Address after: 276000 Middle Quanzhong Road, Linyi High-tech Zone, Shandong Province Applicant after: LINYI TIANKUO CASTING CO., LTD. Address before: 266000 2 Hui Ying Street, Jiaozhou economic and Technological Development Zone, Qingdao, Shandong Applicant before: QINGDAO R & D INSTITUTE, XI'AN JIAOTONG UNIVERSITY Applicant before: Qingdao apulse Intellectual Property Management Co. Ltd |
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