CN208162554U - A kind of casting mold of solution strengthening ferrite ductile cast iron wind power casting - Google Patents
A kind of casting mold of solution strengthening ferrite ductile cast iron wind power casting Download PDFInfo
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- CN208162554U CN208162554U CN201820377666.2U CN201820377666U CN208162554U CN 208162554 U CN208162554 U CN 208162554U CN 201820377666 U CN201820377666 U CN 201820377666U CN 208162554 U CN208162554 U CN 208162554U
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Abstract
The utility model discloses a kind of casting molds of solution strengthening ferrite ductile cast iron wind power casting comprising sandbox, sand mold and type core, sand mold and type core combine the cavity structure to be formed and include：Casting type chamber, the casting cavity shape are fitted the shape of the wind power casting, are equipped with several riser above the casting type chamber；Running gate system, the running gate system include at least one into Tie Kou, at least one molten iron sprue, center splitter cavity, several molten iron runners and several filters；And temperature-increasing system, the temperature-increasing system include several hot-air channels, the hot-air channel is communicated in above the casting type chamber.In the casting mold of the utility model, the running gate system is reasonably distributed, and a plurality of molten iron runner is substantially shorter the duration of pouring, guarantees steady into iron, in conjunction with the use of the filter, can effectively avoid casting and cold shut and dreg defect occurs.The setting of the riser can guarantee the riser feeding of type chamber.
Description
Technical field
The utility model belongs to casting technology field, and in particular to a kind of solution strengthening ferrite ductile cast iron wind power casting
Casting mold.
Background technique
Currently, on the one hand wind-powered electricity generation manufacturer is researching and developing powerful generating set, another with the aggravation that wind-power market competes
Aspect controls manufacturing cost, and the lightweight of Wind turbines has become a kind of trend, and it is necessary that this requires wind power castings
Use the wind-powered electricity generation material of higher intensity.
Si is most common element in cast iron, ferritic intensity can be made to improve with reinforced ferrite.But recognized always in the past
Spheroidal graphite cast-iron is set to become fragile for Si.1949, first, the U.S. spheroidal graphite cast-iron patent of Mills application thought, increase w (Si) amount (>
2.5%) mechanical property, especially toughness, tensile strength and ductility be can obviously reduce.In actual production and subsequent research
In then find that above-mentioned statement has a significant limitation, 1998, Sweden, which defines, produced QT450 with w (Si) amount for 3.2%,
QT500 is produced with w (Si) amount is 3.7%, produces QT500 with w (Si) is 3.7%.The research of Indexator company of Sweden
Think, having no progeny for ferrite ductile cast iron can be made to stretch using Si solution strengthening ferrite the rank of tensile strength 500MPa
Long rate is 2 times of conventional ferrite-pearlite spheroidal graphite cast-iron, while yield strength increases, and yield ratio increases to 0.8 from 0.6, punching
It is slightly excellent to hit performance, overcomes production difficult point, and the spheroidal graphite cast-iron of this Si reinforcing and ADI are referred to as second generation spheroidal graphite cast-iron.So far,
U.S. etc. has received and grant 3 spheroidal graphite cast-iron patents strengthened with Si, and the states such as Finland also start to apply in production.Currently, many
Such new material has been classified as the project of focus development and research by external wind-powered electricity generation complete machine enterprise, is intended to be used in wind power casting.
Have more external wind-powered electricity generation manufacturers at present and studying and such material is applied to wind power casting and has been done a large amount of
Research work, domestic some strong wind-powered electricity generation manufacturers also start to develop toward this direction.The casting of silicon solution strengthening ferritic spheroidal graphite
Iron is as a kind of novel wind-powered electricity generation material, on the one hand since high yield tensile ratio and good elongation can reduce casting section thickness,
And then mitigate casting weight.The mitigation of another aspect casting weight not only contributes to the reduction of manufacturing cost, and the weight of complete machine
Amount and cost can also be greatly reduced.Therefore, the research for such novel wind power material and application have become a kind of imperative
Trend.
But from the point of view of development situation, relative to common material, due to cast silicon solution strengthening ferrite ductile cast iron material
The iron liquid poor mobile performance of material, smelting technology, in terms of have certain uniqueness and complexity, especially make
With this cast size when larger and complicated wind power casting, there are slag inclusion tendencies greatly, and shrinkage porosite is inclined to bigger etc. ask
Topic so that the wind power casting of this material can not volume production, therefore be badly in need of to this material casting wind power casting technique carry out
Improve.
Utility model content
The purpose of this utility model is to provide a kind of casting molds of solution strengthening ferrite ductile cast iron wind power casting, use
The casting mold casts solution strengthening ferrite ductile cast iron wind power casting, can effectively solve slag inclusion and shrinkage porosite phenomenon, improves wind-powered electricity generation casting
Volume production can be realized while part performance.
The casting mold of the solution strengthening ferrite ductile cast iron wind power casting of the utility model includes sandbox, sand mold and type core,
It is characterized in that, the cavity structure of the casting mold includes：
Casting type chamber, the casting type chamber are composed of sand mold and type core, and the shape of form fit wind power casting is described
Several riser are equipped with above casting type chamber；
Running gate system, the running gate system include at least one into Tie Kou, at least one molten iron sprue, center splitter cavity
With several molten iron runners, the molten iron sprue and the molten iron runner are set to the casting mold bottom, and the center shunts
Chamber is set to the casting mold bottom centre position；Molten iron sprue upstream is connected with described into iron mouth, downstream and the center
Splitter cavity is connected；Several molten iron runners are uniformly distributed in divergent shape, and upstream and the center splitter cavity are connected, downstream
End is passed through the casting type chamber, is respectively equipped with filter on several molten iron runners；And
Temperature-increasing system, the temperature-increasing system include several hot-air channels, and the hot-air channel is communicated in the casting type
Above chamber.
It is identical with common mold making process when the casting mold makes, sand mold by into sandbox knockout form, in sand mold
There are running gate system, temperature-increasing system and central cavities, and type core is then put into central cavity, casting mold, sand mold are formed after mould assembling
It is combined with type core, centre forms casting type chamber.
In some preferred embodiments of the utility model, the wind power casting is wind-powered electricity generation pedestal, and the wind-powered electricity generation pedestal includes
Flange in the bottom, abnormal curved surface and wheel hub installing ring, the flange in the bottom are set to the bottom of the abnormal curved surface, the wheel hub installation
Circle is set to the top side of the abnormal curved surface；The shape of the casting cavity shape fitting wind-powered electricity generation pedestal.
Preferably, the running gate system inner wall uses refractory fireclay block.
Preferably, the filter is floamed ceramics filtrating piece.
Preferably, the sandbox is plastic box or metal box.
The beneficial effects of the utility model are：
In the casting mold of the utility model, the running gate system is reasonably distributed, and a plurality of molten iron runner is substantially shorter casting
Time, guarantee steady into iron, in conjunction with the use of the filter, can effectively avoid casting and cold shut and dreg defect occur.It is described
The specific aim of riser is arranged, it is ensured that the riser feeding of type chamber.
Detailed description of the invention
Fig. 1 is the schematic diagram of fit pedestal；
Fig. 2 be the utility model casting mold inside casting type chamber, running gate system and temperature-increasing system stereoscopic schematic diagram；
Fig. 3 be the utility model casting mold inside casting type chamber, running gate system and temperature-increasing system bottom schematic view；
Fig. 4 is the stereoscopic schematic diagram of common casting mold interior mold type chamber and casting system；
Fig. 5 is the bottom schematic view of common casting mold interior mold type chamber and casting system.
Appended drawing reference
Flange in the bottom 11, abnormal curved surface 12, wheel hub installing ring 13；
The utility model casting mold：Casting type chamber 21；Running gate system 22, into iron mouth 221, molten iron sprue 222, center is shunted
Chamber 223, molten iron runner 224, filter 225；Temperature-increasing system 23；Riser 24；
Common casting mold：Casting type chamber 31；Running gate system 32.
Specific embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.It should be understood that following embodiment is only used for
Bright the utility model is not for restriction the scope of the utility model.
The casting mold of 1 wind-powered electricity generation pedestal of embodiment
Fig. 1 show GE3.2MW-130 zoarium pedestal, including flange in the bottom 11, abnormal curved surface 12 and wheel hub installing ring 13,
Flange in the bottom 11 is set to the bottom of abnormal curved surface 12, and wheel hub installing ring 13 is set to the top side of abnormal curved surface 12.The wind-powered electricity generation bottom
Seat weight about 18.17T, full-size 4042mm*3600mm*3010mm, main wall thickness 70-200mm, material QT600-10.
By taking above-mentioned GE3.2MW-130 zoarium pedestal (QT600-10) as an example, the solution strengthening of the corresponding design of the utility model
The casting mold of ferrite ductile cast iron wind power casting, including sandbox, sand mold and type core.Sand mold by into sandbox knockout form, then
It is put into type core, forms casting mold after mould assembling.It is equipped in casting mold：Casting type chamber 21, running gate system 22 and temperature-increasing system 23.Casting type chamber
21, running gate system 22 and temperature-increasing system 23 are used as internal structure, are collectively constituted by sand mold and type core, a combination thereof shape such as Fig. 2 and 3
Shown, the shape of 21 form fit wind-powered electricity generation pedestal of casting type chamber is equipped with several riser 24 above casting type chamber.Running gate system 22 is wrapped
It includes to one into 221, two molten iron sprues 222 of iron mouth, center splitter cavity 223 and 9 molten iron runner 224, molten iron mainstream
Road 222 and molten iron runner 224 are set to casting mold bottom, and center splitter cavity 223 is set to casting mold bottom centre position；Molten iron sprue
22 upstreams are connected with into iron mouth 221, and downstream and center splitter cavity 223 are connected；Several molten iron runners 222 uniformly divide in divergent shape
Cloth, and upstream and center splitter cavity 223 are connected, downstream end is passed through on 21,9 molten iron runners 224 of casting type chamber and sets respectively
There is filter 225.Temperature-increasing system 23 includes several hot-air channels, and hot-air channel is communicated in 21 top of casting type chamber.
Embodiment 2 casts GE3.2MW-130 zoarium pedestal (QT600-10) using the casting mold of embodiment 1
Casting step：
(a) melt iron
Furnace charge：The new pig iron 40~50%, foundry returns 30~40%, steel scrap 10~20%.
Further, the new pig iron is high-purity pig iron, wherein C：>=4.0%, Mn：≤ 0.10%, P：≤
0.025%, S：≤ 0.015%, anti-nodularization harmful alloying elements summation≤0.08%；The steel scrap is useless for sheet carbon
Steel, wherein C：≤ 0.15%, Mn：≤ 0.40%, P：≤ 0.03%, S：≤ 0.03%.
Furnace charge is smelted into molten iron；Charging component is adjusted by spectrum analysis, controls carbon equivalent C in molten iron：3.4%~
3.5%, Si：3.7%~4.0%, Mn：0.1%~0.35%, P：< 0.04%, S：≤ 0.012%, Mg：0.04%~
0.07%, Cr：< 0.05%, Ti：< 0.03%；
(b) spheroidising and inoculation
Low RE-Mg-ferrosilicon alloy nodulizer (the 50% angstrom of willing Asia 5813+50% peak YFQ-55A) is selected, and uses and pours method
Spheroidising is carried out, nodulizer additional amount is 1.0%~1.2%；Specially：Nodulizer is embedded within casting ladle simultaneously appropriate by it
Consolidation carries out spheroidising, starts spheroidizing reacion in iron 2/3rds out, and nodularization should control tapping temperature before carrying out
1400~1470 DEG C.
Si-Ca-Ba inovulant is selected to carry out inoculation, innoculant adding quantity is the 0.6%~0.65% of weight of molten iron, and
It breeds in two times, specially：Covering breeds (0.5% angstrom of Kenko calcium barium 3-8mm) and is added in molten iron surface before and after nodularization is skimmed, with
Stream, which breeds (0.10~0.15% angstrom of willing sulphur oxygen 0.2-0.7mm), to be added in molten iron in casting process.
(c) type is filled
The casting type chamber is aerated by the hot-air channel with 150 DEG C or so of hot wind and is heated.Ventilation heats
After full 10h, the molten iron casting by nodularization and after breeding is filled type into the casting mold of embodiment 1, is solidified up to casting.
Cooling s imulation is carried out using MAGMA or Any casting software, when throwing mold process, in the position for being also easy to produce shrinkage porosite
It sets and adds chill.
This method advantage：
1, iron liquid flows through running gate system, shunts through 9 molten iron runners and 9 filter filterings are subsequently into casting type
Chamber, it is ensured that the degree of purity of molten iron and into iron fill type uniform and stable and shorten the duration of pouring, casting can be avoided slag inclusion occur as far as possible
Defect.
2, casting type chamber is carried out heating processing by divulging information in advance, effectively avoids cold shut phenomenon；It is being also easy to produce contracting simultaneously
Loose defective locations place chill, can effectively avoid shrinkage porosite.
3, it is evenly distributed using the pure ferrite matrix EN-GJS-600-10 casting hardness that solution strengthening principle produces, it can
To there is preferable machinability, cutter life is extended, reduces machining cost.
Comparative example 1 uses common casting mold casting GE2.5MW-120 zoarium pedestal (QT400-18)
GE2.5MW-120 zoarium understructure is identical as the GE3.2MW-130 zoarium pedestal of embodiment 1, including bottom method
Blue, abnormal curved surface and wheel hub installing ring.The wind-powered electricity generation pedestal weight about 18.66T, full-size 4022mm*3920mm*2642mm,
Main wall thickness 60-128mm, material QT400-18.
By taking GE2.5MW-120 zoarium pedestal (QT400-18) as an example, comparative example 1 uses common casting mold, is equipped in casting mold：Casting
Part type chamber 31 and running gate system 32, as shown in Figures 4 and 5, casting cavity shape are fitted the shape of wind-powered electricity generation pedestal and standing of turning on one's side, casting
Several outlets are equipped with above part type chamber.Running gate system includes two into Tie Kou, filtration system and two molten iron sprues；Molten iron
Sprue upstream is connected with into iron mouth, and downstream is passed through casting type chamber.
Casting step：
(a) melt iron
Furnace charge：The new pig iron 55~75%, foundry returns 20~35%, steel scrap 5~20%.
Further, the new pig iron is high-purity pig iron, wherein C：>=4.0%, Mn：≤ 0.10%, P：≤
0.025%, S：≤ 0.015%, anti-nodularization harmful alloying elements summation≤0.08%；The steel scrap is useless for sheet carbon
Steel, wherein C：≤ 0.15%, Mn：≤ 0.40%, P：≤ 0.03%, S：≤ 0.03%.
Furnace charge is smelted into molten iron；Charging component is adjusted by spectrum analysis, controls carbon equivalent C in molten iron：3.75%~
3.85%, Si：1.8%~2.4%, Mn：0.1%~0.35%, P：≤ 0.04%, S：≤ 0.012%, Mg：0.04%~
0.07%, Cr：< 0.05%, Ti：< 0.03%；
(b) spheroidising and inoculation
Low RE-Mg-ferrosilicon alloy nodulizer (angstrom agree 5813) is selected, and spheroidising, nodulizer are carried out using the method that pours
Additional amount is 1.0%~1.1%；Specially：Nodulizer is embedded within casting ladle and appropriate consolidation by it, carries out spheroidising,
Start spheroidizing reacion in iron 2/3rds out, nodularization should control 1400~1470 DEG C of tapping temperature before carrying out.
Si-Ca-Ba inovulant is selected to carry out inoculation, innoculant adding quantity is the 0.7%~1.25% of weight of molten iron, and
It breeds in three times, specially：Covering breeds (0.2-0.3%75 silicon iron inoculator 3-8mm) and is added in molten iron table before nodularization is skimmed
Face once breeds (0.4-0.8% angstroms of Kenko calcium barium 3-8mm) and is added in molten iron surface after nodularization is skimmed, current-following inoculation (0.10~
0.15% angstrom of willing sulphur oxygen 0.2-0.7mm) it is to be added in molten iron in casting process.
(c) type is filled
The casting type chamber is aerated by the hot-air channel with 150 DEG C or so of hot wind and is heated.Ventilation heats
After full 8h, the molten iron casting by nodularization and after breeding is filled type into casting mold, is solidified up to casting.
The wind-powered electricity generation pedestal cast to embodiment 2 and comparative example 1 carries out performance evaluation respectively
Embodiment 2：GE3.2MW-130 zoarium pedestal, material QT600-10, tensile strength >=530MPa, 0.2% surrender
Intensity >=400Mpa, elongation percentage >=12.5%, the impact resistance (non-notch) at -20 DEG C ± 2 DEG C：The impact of three samples is average
Value >=7J is individually not less than 5J.
Comparative example 1：GE2.5MW-120 zoarium pedestal, material QT400-18, tensile strength >=370MPa, 0.2% surrender
Intensity >=220Mpa, elongation percentage >=12%, the impact resistance (non-notch) at -20 DEG C ± 2 DEG C：The impact average value of three samples
>=10J is individually not less than 7J.
To sum up：1, solution strengthening ferrite ductile cast iron wind power casting has the combination of better mechanical property (tensile strength is bent
Take intensity and elongation percentage), designer can be made to reduce casting section thickness, to mitigate casting weight.2, solution strengthening ferrite
The slag inclusion of spheroidal graphite cast-iron wind power casting, shrinkage porosite tendency are bigger, every to degree of purity, hot metal composition and mold temperature of molten iron etc. to join
Several requirements is higher.
The preferred embodiment created to the utility model above is illustrated, but the utility model is created not
It is limited to embodiment, those skilled in the art are various etc. without prejudice to can also make under the utility model precondition for innovation
Same variation or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (5)
1. a kind of casting mold of solution strengthening ferrite ductile cast iron wind power casting comprising sandbox, sand mold and type core, feature exist
In the cavity structure of the casting mold includes：
Casting type chamber, the casting type chamber are composed of sand mold and type core, the shape of form fit wind power casting, the casting
Several riser are equipped with above type chamber；
Running gate system, if the running gate system include at least one into Tie Kou, at least one molten iron sprue, center splitter cavity and
Dry molten iron runner, the molten iron sprue and the molten iron runner are set to the casting mold bottom, and the center splitter cavity is set
In the casting mold bottom centre position；Molten iron sprue upstream is connected with described into iron mouth, and downstream and the center shunt
Chamber is connected；Several molten iron runners are uniformly distributed in divergent shape, and upstream and the center splitter cavity are connected, downstream end
It is passed through the casting type chamber, is respectively equipped with filter on several molten iron runners；And
Temperature-increasing system, the temperature-increasing system include several hot-air channels, and the hot-air channel is communicated on the casting type chamber
Side.
2. the casting mold of solution strengthening ferrite ductile cast iron wind power casting as described in claim 1, which is characterized in that the wind
Electroforming part is wind-powered electricity generation pedestal, and the wind-powered electricity generation pedestal includes flange in the bottom, abnormal curved surface and wheel hub installing ring, and the flange in the bottom is set
In the bottom of the abnormal curved surface, the wheel hub installing ring is set to the top side of the abnormal curved surface；The casting type chamber shape
The shape of shape fitting wind-powered electricity generation pedestal.
3. the casting mold of solution strengthening ferrite ductile cast iron wind power casting as described in claim 1, which is characterized in that described to pour
Injection system inner wall uses refractory fireclay block.
4. the casting mold of solution strengthening ferrite ductile cast iron wind power casting as described in claim 1, which is characterized in that the mistake
Filter is floamed ceramics filtrating piece.
5. the casting mold of solution strengthening ferrite ductile cast iron wind power casting as described in claim 1, which is characterized in that the sand
Case is plastic box or metal box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820377666.2U CN208162554U (en) | 2018-03-20 | 2018-03-20 | A kind of casting mold of solution strengthening ferrite ductile cast iron wind power casting |
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| CN201820377666.2U CN208162554U (en) | 2018-03-20 | 2018-03-20 | A kind of casting mold of solution strengthening ferrite ductile cast iron wind power casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311644A (en) * | 2018-03-20 | 2018-07-24 | 江苏吉鑫风能科技股份有限公司 | A kind of casting mold and casting method of solution strengthening ferrite ductile cast iron wind power casting |
| CN111036853A (en) * | 2019-12-05 | 2020-04-21 | 江苏吉鑫风能科技股份有限公司 | Size control method for 8MW fan base casting |
-
2018
- 2018-03-20 CN CN201820377666.2U patent/CN208162554U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311644A (en) * | 2018-03-20 | 2018-07-24 | 江苏吉鑫风能科技股份有限公司 | A kind of casting mold and casting method of solution strengthening ferrite ductile cast iron wind power casting |
| CN108311644B (en) * | 2018-03-20 | 2024-01-12 | 江苏吉鑫风能科技股份有限公司 | Casting mold and casting method of solid solution reinforced ferrite nodular cast iron wind power casting |
| CN111036853A (en) * | 2019-12-05 | 2020-04-21 | 江苏吉鑫风能科技股份有限公司 | Size control method for 8MW fan base casting |
| CN111036853B (en) * | 2019-12-05 | 2021-02-26 | 江苏吉鑫风能科技股份有限公司 | Size control method for 8MW fan base casting |
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