CN105057589B - Method for increasing number of directionally solidified blade column crystals - Google Patents
Method for increasing number of directionally solidified blade column crystals Download PDFInfo
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- CN105057589B CN105057589B CN201510419255.6A CN201510419255A CN105057589B CN 105057589 B CN105057589 B CN 105057589B CN 201510419255 A CN201510419255 A CN 201510419255A CN 105057589 B CN105057589 B CN 105057589B
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- directional solidification
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Abstract
Disclosed is a method for increasing the number of directionally solidified blade column crystals. A wax mould module is manufactured according to required shapes, and the length of a seeding end of the wax mould module is no less than 15mm; the wax mould module with a crystallization chassis facing downwards and a pouring cup vertically upward is horizontally moved to a position above a directional solidified surface slurry which contains a surface nucleating agent and vertically dropped, so that the crystallization chassis is submerged in the directional solidified surface slurry containing the surface nucleating agent till the submerge position reaches the seeding end which is 5mm above the upper surface of the crystallization chassis, and then the wax mould module is vertically taken out; then sand sprinkling, pouring and cleaning are performed to obtain a directional solidified blade with the column crystals. The number of the obtained directional column crystals is obviously increased by at least 3-5, the method can meet column crystal number lower limit requirement which is specified in blade metallurgy technological standards, and the method is applied to increasing the number of blade column crystals in directional solidification, simple and easy to implement.
Description
Technical field
The invention belongs in precision-investment casting directional solidification blade manufacturing technology field, it is more particularly to a kind of to increase
Plus the method for directional solidification blade cylindrulite number.
Background technology
For the blade of directional solidification technique manufacture in precision-investment casting, the bar number of cylindrulite is required if lower limit, then
Strict technological parameter is needed to ensure, drawing velocity, assembled scheme of wax-pattern of vacuum drying oven cast etc. have one to number of dies
Fixed impact.Only there is risk by rule of thumb to the adjustment of factors above during produced on-site, for chord width relative narrower
Blade, to reach the cylindrulite of greater number, cannot have absolute guarantee.
The content of the invention
To overcome the problems of the prior art, it is an object of the invention to provide a kind of increase directional solidification blade cylindrulite number
Method.
For achieving the above object, the present invention is adopted the following technical scheme that：
A kind of method for increasing directional solidification blade cylindrulite number, comprises the following steps：
1) wax-pattern manufacture：Shape manufacture wax-pattern module as needed, and wax-pattern module seeding end length is not shorter than
15mm；
2) material process is applied：
2.1) coating is configured：The directional solidification surface layer slip containing surface inovulant is prepared, wherein, surface inovulant is accounted for containing table
The 8% of the directional solidification surface layer slip mass fraction of face inovulant；
2.2) dip：By wax-pattern module crystallization chassis down, it is cup is vertical upward, move to containing surface inovulant
Directional solidification surface layer slip top, vertically falls, and makes the directional solidification surface layer slip containing surface inovulant flood crystallization chassis, directly
It is vertical to take out to flooding at crystallization chassis upper surface above 5mm position seeding end；
2.3) stucco；
3) cast；
4) directional solidification blade with cylindrulite is obtained after clearing up.
The surface inovulant is cobalt aluminate.
The directional solidification surface layer slip is the mixture of Ludox and mullite.
The Ludox is 1 with the mass ratio of mullite：3.5.
Compared with prior art, the device have the advantages that：The present invention is by using the orientation containing surface inovulant
Solidification capstock slurry, and under conditions of ensureing that wax-pattern module seeding end length is not shorter than 15mm, by dip, cast, clearly
The directional solidification blade with cylindrulite can be obtained after reason, and can be in the starting of the seeding end of foundry goods through grain attack technique
More obvious equi-axed crystal is seen in position, and along seeding end to blade and blade with grow some directional columnargrains, it is and existing
Technology is compared, and the bar number of directional columnargrain substantially increases at least 3~5, and the method for the present invention disclosure satisfy that blade metallurgical technical bid
The cylindrulite bar number lower limit of quasi- regulation requires that the present invention is applied to the number for increasing directional solidification Leaf cylindrulite, and method letter
It is single, it is easy to accomplish.
Description of the drawings
Fig. 1 is the combination diagram that embodiment 1 certain directional vane is coated with cobalt aluminate slip.
Fig. 2 is the combination diagram that embodiment 3 certain solid directional vane is coated with cobalt aluminate slip.
Fig. 3 is the photo of certain the blade grain size corrosion of embodiment 1.
In figure, 1 is that wax-pattern module crystallizes chassis, and 2 is wax-pattern module seeding end.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in detail.
Directional solidification surface layer slip is mass ratio 1 in the present invention：3.5 Ludox and the mixture of mullite；The table
Face inovulant is cobalt aluminate.
Embodiment 1：
Referring to Fig. 1, certain directional vane total length 120mm, chord width 5mm, grain size requires at least 5 cylindrulites at blade 1/2.
A kind of method for increasing directional solidification blade cylindrulite number, comprises the following steps：
1) wax-pattern manufacture：Shape manufacture wax-pattern module as needed, and the length of wax-pattern module seeding end 2 is not shorter than
15mm；
2) material process is applied：
2.1) coating is configured：The directional solidification surface layer slip containing surface inovulant is prepared, wherein, surface inovulant is accounted for containing table
The 8% of the directional solidification surface layer slip mass fraction of face inovulant；Wherein, directional solidification surface layer slip is mass ratio 1：3.5
The mixture of Ludox and mullite；Surface inovulant is cobalt aluminate.
2.2) dip：By wax-pattern module crystallization chassis 1 down, it is cup is vertical upward, move to inovulant containing surface
Directional solidification surface layer slip top, vertically fall, make the directional solidification surface layer slip containing surface inovulant flood crystallization chassis,
Until flood at crystallization chassis upper surface above 5mm position seeding end, it is vertical to take out；
2.3) stucco；
3) cast；
4) directional solidification blade with cylindrulite is obtained after clearing up.
Cannot stably ensure that number of dies can grow more than 4 at 1/2 by adjusting technique of the prior art
Cylindrulite, using the method for the present invention, finally give average 6~7 along the cylindrulite of blade major axes orientation growth.
Embodiment 2：
Certain machine guide vane foundry goods is hollow blade, and minimum chord width is only 15mm, and narrower width, the growth to cylindrulite is produced
Limit, while according to grain size acceptance criteria, it is desirable at least 5 column crystals at blade 1/2.
A kind of method for increasing directional solidification blade cylindrulite number, comprises the following steps：
1) wax-pattern manufacture：Shape manufacture wax-pattern module as needed, and make wax-pattern module seeding end length be 20mm；
2) material process is applied：
2.1) coating is configured：The surface layer slip containing cobalt aluminate is prepared, wherein, directional solidification surface layer slip is mass ratio 1：
3.5 Ludox and the mixture of mullite；Cobalt aluminate accounts for 8% of the directional solidification surface layer slip mass fraction containing cobalt aluminate；
2.2) dip：By module crystallization chassis down, cup is vertically picked up upward, moves to cobalt aluminate surface layer slip
On, vertically fall.Slip is flooded into crystallization chassis, until flooding at the seeding end of chassis upper surface above 5mm position, is vertically taken
Go out, it is ensured that the every single wax-pattern seeding end starting position of module is uniformly coated with the slip of 5mm.
4), stucco：Stucco parameter is identical with orientation slip surface layer stucco parameter.
Using method of the prior art, grain size state makes moderate progress, but still does not reach standard requested number.By making
With the inventive method, number of dies entirely reaches standard required value, and carries out test batch checking, in stable condition.
Embodiment 3：
Certain two type directional vane total length 105mm or so, chord width 26mm, grain size requires at least 6 cylindrulites at blade 1/2.
A kind of method for increasing directional solidification blade cylindrulite number, comprises the following steps：
1) wax-pattern manufacture：Shape manufacture wax-pattern module as needed, and make wax-pattern module seeding end length be 20mm；
2) material process is applied：
2.1) coating is configured：The directional solidification surface layer slip containing cobalt aluminate is prepared, wherein, directional solidification surface layer slip is matter
Amount compares 1：3.5 Ludox and the mixture of mullite；Cobalt aluminate accounts for the directional solidification surface layer slip mass fraction containing cobalt aluminate
8%；
2.2) dip：By wax-pattern module crystallization chassis down, it is cup is vertical upward, move to containing surface inovulant
Directional solidification surface layer slip top, vertically falls, and makes the directional solidification surface layer slip containing surface inovulant flood crystallization chassis, directly
It is vertical to take out to flooding at crystallization chassis upper surface above 5mm position seeding end；
2.3) stucco；
3) cast；
4) directional solidification blade with cylindrulite is obtained after clearing up.
Using technique of the prior art, cannot stably ensure that number of dies can grow the post more than 4 at 1/2
Crystalline substance, by using the inventive method, number of dies entirely reaches standard required value, and carries out test batch checking, in stable condition.
Referring to Fig. 3, Fig. 3 is directional solidification blade obtained in embodiment 3 through grain attack figure, as can be seen from Figure 3 shape
Into 7~8 cylindrulites.
Claims (2)
1. it is a kind of increase directional solidification blade cylindrulite number method, it is characterised in that comprise the following steps：
1) wax-pattern manufacture：Shape manufacture wax-pattern module as needed, and make wax-pattern module seeding end length not be shorter than 15mm；
2) material process is applied：
2.1) coating is configured：The directional solidification surface layer slip containing surface inovulant is prepared, wherein, surface inovulant accounts for pregnant containing surface
Educate agent directional solidification surface layer slip mass fraction 8%；
2.2) dip：By wax-pattern module crystallization chassis down, it is cup is vertical upward, move to the orientation containing surface inovulant
Solidification capstock slurry top, vertically falls, and makes the directional solidification surface layer slip containing surface inovulant flood crystallization chassis, until flooding
Do not crystallize at the seeding end of chassis upper surface above 5mm position, it is vertical to take out；
2.3) stucco；
3) cast；
4) directional solidification blade with cylindrulite is obtained after clearing up；
The surface inovulant is cobalt aluminate；
The directional solidification surface layer slip is the mixture of Ludox and mullite.
2. it is according to claim 1 it is a kind of increase directional solidification blade cylindrulite number method, it is characterised in that the silicon
Colloidal sol is 1 with the mass ratio of mullite：3.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510419255.6A CN105057589B (en) | 2015-07-16 | 2015-07-16 | Method for increasing number of directionally solidified blade column crystals |
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| CN201510419255.6A CN105057589B (en) | 2015-07-16 | 2015-07-16 | Method for increasing number of directionally solidified blade column crystals |
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| CN105057589B true CN105057589B (en) | 2017-05-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107983911A (en) * | 2017-12-06 | 2018-05-04 | 安徽应流航源动力科技有限公司 | A kind of method for the position crystallite dimension that become larger suddenly using the thick big position of wax-pattern structure preparation improvement orientation casting or section |
| CN108031796A (en) * | 2017-12-30 | 2018-05-15 | 晋江亿兴机械有限公司 | The investment casting production technology of spheroidal graphite cast-iron |
| CN113070454A (en) * | 2021-03-16 | 2021-07-06 | 贵阳航发精密铸造有限公司 | Casting device and method for non-preferred orientation single crystal guide hollow blade |
| CN113953451B (en) * | 2021-10-18 | 2023-03-10 | 马鞍山市方圆材料工程股份有限公司 | Composite shell precision casting process |
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| JPH09168842A (en) * | 1995-12-20 | 1997-06-30 | Yanmar Diesel Engine Co Ltd | Precision casting using disposable pattern of lost wax, or the like and turbine blade |
| CN101823123A (en) * | 2009-10-30 | 2010-09-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method of shangdian soil type shell used for heavy gas turbine plant guide vane investment casting |
| CN102019348A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of low pressure guide connected hollow blade |
| CN103143678A (en) * | 2013-04-01 | 2013-06-12 | 东方电气集团东方汽轮机有限公司 | Formwork for optimizing directional columnar crystal structure of high-temperature alloy blade |
| CN104353786A (en) * | 2014-11-10 | 2015-02-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of shell with long and thin blades of investment casting aero-engine |
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2015
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|---|---|---|---|---|
| JPH09168842A (en) * | 1995-12-20 | 1997-06-30 | Yanmar Diesel Engine Co Ltd | Precision casting using disposable pattern of lost wax, or the like and turbine blade |
| CN101823123A (en) * | 2009-10-30 | 2010-09-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method of shangdian soil type shell used for heavy gas turbine plant guide vane investment casting |
| CN102019348A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of low pressure guide connected hollow blade |
| CN103143678A (en) * | 2013-04-01 | 2013-06-12 | 东方电气集团东方汽轮机有限公司 | Formwork for optimizing directional columnar crystal structure of high-temperature alloy blade |
| CN104353786A (en) * | 2014-11-10 | 2015-02-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of shell with long and thin blades of investment casting aero-engine |
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| 精密铸造等轴晶涡轮叶片晶粒度控制方法;刘文娜等;《特种铸造及有色合金》;20101231;第30卷(第2期);147-148 * |
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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AECC AVIATION POWER CO,LTD. Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee before: AVIC AVIATION ENGINE Corp.,PLC |
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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AVIC AVIATION ENGINE Corp.,PLC Address before: Fengcheng Weiyang District ten road 710021 Shaanxi city of Xi'an Province Patentee before: XI'AN AVIATION POWER Co.,Ltd. |
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