CN107574472A - A kind of improved high-efficiency Z-type crystal selector - Google Patents
A kind of improved high-efficiency Z-type crystal selector Download PDFInfo
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- CN107574472A CN107574472A CN201711042062.9A CN201711042062A CN107574472A CN 107574472 A CN107574472 A CN 107574472A CN 201711042062 A CN201711042062 A CN 201711042062A CN 107574472 A CN107574472 A CN 107574472A
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Abstract
The invention belongs to hot investment casting applied technical field, specifically discloses a kind of improved high-efficiency Z-type crystal selector, by support block, support column, centring ring, graining end, confinement section, select brilliant section, set of transitions into；Described several graining ends being used in combination with support block, centring ring, several confinement sections, several select brilliant section, several changeover portions to be respectively set to 10, wherein, 10 are selected the starting of brilliant section to select brilliant section to be arranged to Z-type structure, and terminal selects brilliant section to be arranged to horizontal U-shape structure.The beneficial effects of the present invention are：On the one hand brilliant section is selected to use the diameter of suitable dimension, both ensure to select brilliant efficiency, the intensity of brilliant section is selected in guarantee again, brilliant section is selected to employ rational raising angle, it can ensure that crystal grain is smoothly grown up, on the other hand 10 graining ends being used in combination, confinement section, select brilliant section and changeover portion and size is different, improve the producing efficiency of crystal selector and reduce the probability that stray crystal occurs, significantly improve and select brilliant efficiency.
Description
Technical field
The invention belongs to hot investment casting applied technical field, and in particular to a kind of improved high-efficiency Z-type crystal selector.
Background technology
Nickel base superalloy is widely used in Aeronautics and Astronautics, navigation and energy because having good mechanical performance
The fields such as work, nickel-base high-temperature single crystal alloy are even more the head for turning into advanced aero engine design with its excellent mechanical behavior under high temperature
Material selection.But in industrial production, single crystal super alloy turbo blade is deposited because the coagulation defects such as orientation deviation, stray crystal, shrinkage porosite
And cause its percent defective higher, thus these coagulation defects turn into the subject matter of single crystal super alloy research, and select brilliant mistake
One of the main reason for the defects of Cheng Ze is and causes crystal orientation deviation and stray crystal is formed, but prepared by nickel to crystal separation method at present
During based single-crystal high-temperature alloy select brilliant mechanism to be also not very clear, the design to crystal selector also relies on experience, not yet establishes
Select the correlation that the brilliant stage is formed with defect.
Conventional research shows, the geometric parameter of crystal selector（Seeding section and select brilliant section parameter）Directly determine that final choosing is brilliant
As a result, it is believed that increase the ratio between the height of seeding section and seeding section diameter, the qualification rate of monocrystalline can be improved, used simultaneously
Two dimensional model, analog study influence of the crystal selector inclination angle to monocrystalline qualification rate, the results showed that：When crystal selector inclination angle is 30
During the degree left and right of degree -40, the qualification rate of monocrystalline is highest, in crystal selector diameter smaller range, with the increase of diameter, monocrystalline
Qualification rate also increases, while the height of crystal selector and seeding section diameter have not significant impact to the qualification rate of final monocrystalline, pass through
Numerical simulation and experimental study, analyze the process of crystal grain competitive growth and the crystal grain selection of different crystal selectors, result of study table
It is bright：The geometric properties of crystal selector are to selecting brilliant effect to have very big influence, and with the increase for playing lift angle, single crystal organization is selecting brilliant section
Interior acquisition position gradually increases, and result of study shows simultaneously, and with the increase for selecting brilliant diameter, single crystal organization is obtained selecting in brilliant section
The position obtained gradually reduces.Therefore, to consider in the design of two-dimentional crystal selector seeding section and select brilliant section geometry and
Influence of the parameter to monocrystalline quality, to improve the qualification rate of single crystal blade and optimize with reference to seed-grain method and control final monocrystalline to take
To.
Should be tried one's best during single crystal preparation reduces the height of crystal selector, is lacked so as to ensure the length of blade and reduce solidification
The tendency formed is fallen into, but when crystal selector seeding section is highly relatively low, crystal grain orientations optimized effect and unobvious, meeting in seeding section
Cause final single-crystal orientation poor；When crystal selector selects the height of brilliant section too low（Select brilliant section parameter improper）It can influence to select brilliant mistake again
Journey is smoothed out, and causes the formation of stray crystal in passage, so as to influence the quality of final monocrystalline, is resulted even in and is selected brilliant process
Failure, it is impossible to obtain single crystal organization.Therefore, during crystal separation method prepares nickel-base high-temperature single crystal alloy turbo blade, it is ensured that
The sufficient length of blade and high choosing crystalline substance success rate, it just must reasonably design the size of crystal selector.However, although select crystal technique
Relatively broad application is obtained in field of industrial production, but the research to selecting brilliant process is far from reaching the weight to monocrystalline in itself
Visual range degree, it is unfavorable for the development of Crystal Growth Technique.
The external design for crystal selector structure and parameter is more ripe, and it is higher qualified also to ensure in industrial production
Rate, but crystal selector structure snd size belong to the know-how of single crystal preparation, it is external highly confidential, it is necessary to autonomous tackling key problem.At present
Though domestic relevant unit can prepare single crystal super alloy turbo blade using crystal separation method, the design for crystal selector is also
Only be by virtue of experience, for selecting the research of brilliant mechanism also insufficient, at the same because the brilliant failure of choosing and caused by blade rejection rate it is also non-
Chang Gao.Therefore the rational design for crystal selector has turned into the big obstacle for restricting China's single crystal blade and preparing, necessary right
Brilliant process is selected to carry out in-depth study, particularly between crystal selector geometric parameter and the choosing crystalline substance efficiency and single-crystal orientation of crystal selector
Relation make further further investigation, the rational design for crystal selector has very big practical significance.
Therefore, a kind of improved high-efficiency Z-type crystal selector is provided based on above mentioned problem, the present invention.
The content of the invention
Goal of the invention：It is an object of the invention to provide a kind of improved high-efficiency Z-type crystal selector, and it can be further research
Brilliant mechanism is selected to find a break-through point, with reference to existing 3D printing technique, to improve China's nickel-base high-temperature single crystal alloy turbine leaf
Piece yield, carry out the reference value that crystal separation method prepares the research offer preciousness of nickel-base high-temperature single crystal alloy.
Technical scheme：The present invention provides a kind of improved high-efficiency Z-type crystal selector, by support block, and is arranged in support block
Support column, and be arranged on the centring ring of support column end, and several graining ends being uniformly arranged in support block, and if with
Several confinement sections that dry graining end is used in combination, and be used in combination with several confinement sections several select brilliant section,
And with several select that brilliant section is used in combination with several set of transitions into, wherein, one end of several changeover portions respectively with
Centring ring connects；The support block, centring ring, support column, several graining ends, several confinement sections, several select brilliant section and
Connected between several changeover portions by cavity, wherein, support block is arranged to conical structure, and centring ring is provided in round tying
Structure and between be more than support block；Described several graining ends being used in combination with support block, centring ring, several confinement sections,
Several select brilliant section, several changeover portions to be respectively set to 10, wherein, 10 are selected the starting of brilliant section to select brilliant section to be arranged to Z-type
Structure, terminal select brilliant section to be arranged to horizontal U-shape structure.
The technical program, described 10 are selected the starting of brilliant section to select brilliant section to be arranged to Z-type structure, and terminal selects brilliant section to be arranged to
Horizontal U-shape structure, wherein, starting Z-type select brilliant section to terminal it is horizontal it is U-shaped select brilliant section diameter it is incremented by successively.
The technical program, several described confinement sections are identical with the diameter of several changeover portions.
The technical program, several described Z-types select the raising angle of brilliant section to set gradually for 10 degree, 15 degree, 20 degree, 25
Spend, 30 degree, 35 degree, 40 degree, 45 degree, 50 degree.
The technical program, the Z-type structure selects a diameter of 2mm-6mm of brilliant section.
The technical program, the height of the changeover portion is 20mm-35mm.
Compared with prior art, the beneficial effect of a modification of the present invention type Efficient Z-type crystal selector is：1st, crystal grain selects
The probability that stray crystal occurs can be reduced during growing up in brilliant section, select brilliant section to use the diameter of suitable dimension, both ensure to select brilliant effect
Rate, ensure to select the intensity of brilliant section again, ensure the smooth shaping of crystal grain, select brilliant section to employ rational raising angle, it is ensured that
While crystal grain is smoothly grown up, it is also ensured that select brilliant section height will not be too high, so as to improve operating efficiency；2nd, 10 matchings
Close the graining end used, confinement section, select brilliant section and changeover portion and size difference, improve the producing efficiency of crystal selector and reduce hair
The probability of raw stray crystal, significantly improves and selects brilliant efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of a modification of the present invention type Efficient Z-type crystal selector；
Wherein, sequence number mark is as follows in figure：1- support blocks, 2- centring rings, 3- support columns, 4- grainings end, 5- confinement sections, 6- choosings are brilliant
Section, 7- changeover portions.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated.
A kind of improved high-efficiency Z-type crystal selector as shown in Figure 1, by support block 1, and the support being arranged in support block 1
Post 3, and be arranged on the centring ring 2 of the end of support column 3, and several graining ends 4 being uniformly arranged in support block 1, and if with
Several confinement sections 5 that dry graining end 4 is used in combination, and several choosing crystalline substances being used in combination with several confinement sections 5
Section 6, and select what brilliant section 6 was used in combination to be formed with several changeover portions 7 with several, wherein, one end of several changeover portions 7
It is connected respectively with centring ring 2；If the support block 1, centring ring 2, support column 3, several graining ends 4, several confinement sections 5,
Dry individual select is connected between brilliant section 6 and several changeover portions 7 by cavity, wherein, support block 1 is arranged to conical structure, fixed
Position circle 2 be provided in round structure and between be more than support block 1；It is described be used in combination with support block 1, centring ring 2 several
Graining end 4, several confinement sections 5, several select brilliant section 6, several changeover portions 7 to be respectively set to 10, wherein, 10 choosings are brilliant
The starting of section 6 selects brilliant section 6 to be arranged to Z-type structure, and terminal selects brilliant section 6 to be arranged to horizontal U-shape structure.
It is further preferred that described 10 are selected the starting of brilliant section 6 to select brilliant section 6 to be arranged to Z-type structure, terminal selects brilliant section 6 to set
Be set to horizontal U-shape structure, wherein, starting Z-type select brilliant section 6 to terminal it is horizontal it is U-shaped select brilliant section 6 diameter it is incremented by successively；It is and described some
Individual confinement section 5 is identical with the diameter of several changeover portions 7；And several described Z-types select the raising angle of brilliant section 6 to set gradually for
5 degree, 10 degree, 15 degree, 20 degree, 25 degree, 30 degree, 35 degree, 40 degree, 45 degree, 50 degree or be arranged to 10 degree, 15 degree, 20 degree, 25 degree,
30 degree, 35 degree, 40 degree, 45 degree, 50 degree, 55 degree；And the Z-type structure selects a diameter of 2mm-6mm of brilliant section 6；And the transition
The height of section 7 be 20mm-35mm, said structure design, one side crystal grain selects grow up in brilliant section during can to reduce generation miscellaneous
Brilliant probability, select brilliant section to use the diameter of suitable dimension, both ensure to select brilliant efficiency, ensure to select the intensity of brilliant section again, ensure crystal grain
Smooth shaping, select brilliant section to employ rational raising angle, it is ensured that while crystal grain is smoothly grown up, it is also ensured that choosing
Brilliant section height will not be too high, so as to improve operating efficiency, on the other hand 10 the graining ends being used in combination, confinement section, choosings
Brilliant section and changeover portion and size difference, improve the producing efficiency of crystal selector and reduce the probability that stray crystal occurs, significantly improve choosing
Brilliant efficiency.
The improved high-efficiency Z-type crystal selector of this structure, 1, using the research method that is combined with numerical simulation of experiment, observe
Crystal grain competitive growth and the superseded process collection of illustrative plates of selection during brilliant from seeding to choosing, and by selecting dendrite in brilliant passage
The observation of competitive growth mode, it is found that the crystal grain during choosing is brilliant on the inside of passage can be gradual during competitive growth
Advantage is occupied, is eliminated away from the crystal grain on the inside of passage, and propose dendrite competition and growing model of stand in two-dimensional channel；2nd, investigated not
With the choosing crystalline substance effect of geometric parameter two dimension crystal selector, the relation between crystal selector geometric parameter and crystal orientation is established, comprehensively
Inquire into and tentatively illustrate directional solidification and founding parameter to selecting the affecting laws of brilliant effect, be that the design of crystal selector and industry are given birth to
The good nickel-base high-temperature single crystal alloy of orientation is prepared in production and provides technical foundation；3rd, the two dimension choosing of set of system Journal of Sex Research is devised
The design of brilliant device, and the monocrystalline sample of even tissue is prepared for using the type crystal selector by method for numerical simulation, analysis
Improved high-efficiency Z-type crystal selector module（Totally 10 kinds of different parameters）Select grain structure in brilliant passage to develop, select brilliant efficiency, be new
The design of generation crystal selector provides reference；4th, the design to two-dimentional crystal selector is closed cocoa and is able to using the method for overall 3D printing
Experiment, greatly accelerates research progress, simultaneously because the precision of 3D printing is consistent with the model accuracy of simulation, substantially increases mould
The accuracy of plan；5th, can be applied to simultaneously in the industrial production of crystal separation method combination seed-grain method by the two-dimentional crystal selector of the structure,
It can be applied to single crystal preparation and the oriented control of the secondary orientation of monocrystalline simultaneously with reference to seed-grain method, be carried for single crystal blade of new generation control
Theoretical direction and experiment basis are supplied.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvement can also be made, these improvement also should be regarded as the present invention's
Protection domain.
Claims (6)
- A kind of 1. improved high-efficiency Z-type crystal selector, it is characterised in that：By support block（1）, and it is arranged on support block（1）On branch Dagger（3）, and it is arranged on support column（3）The centring ring of end（2）, and it is uniformly arranged on support block（1）On several grainings End（4）, and with several graining ends（4）Several confinement sections being used in combination（5）, and with several confinement sections（5）Match Close use several select brilliant section（6）, and with several select brilliant section（6）Be used in combination with several changeover portions（7）Composition, Wherein, several changeover portions（7）One end respectively with centring ring（2）Connection；The support block（1）, centring ring（2）, support column （3）, several graining ends（4）, several confinement sections（5）, several select brilliant section（6）With several changeover portions（7）Between it is logical Cavity connection is crossed, wherein, support block（1）It is arranged to conical structure, centring ring（2）Be provided in round structure and between be more than branch Bracer（1）；Described and support block（1）, centring ring（2）Several graining ends being used in combination（4）, several confinement sections（5）、 Several select brilliant section（6）, several changeover portions（7）10 are respectively set to, wherein, 10 are selected brilliant section（6）Starting select brilliant section （6）Z-type structure is arranged to, terminal selects brilliant section（6）It is arranged to horizontal U-shape structure.
- A kind of 2. improved high-efficiency Z-type crystal selector according to claim 1, it is characterised in that：Described 10 are selected brilliant section（6） Starting select brilliant section（6）Z-type structure is arranged to, terminal selects brilliant section（6）Horizontal U-shape structure is arranged to, wherein, starting Z-type selects brilliant section （6）Brilliant section is selected to terminal horizontal stroke is U-shaped（6）Diameter it is incremented by successively.
- A kind of 3. improved high-efficiency Z-type crystal selector according to claim 1, it is characterised in that：Several described confinement sections （5）With several changeover portions（7）Diameter it is identical.
- A kind of 4. improved high-efficiency Z-type crystal selector according to claim 1 or 2, it is characterised in that：Several described Z-types Select brilliant section（6）Raising angle set gradually as 10 degree, 15 degree, 20 degree, 25 degree, 30 degree, 35 degree, 40 degree, 45 degree, 50 degree.
- A kind of 5. improved high-efficiency Z-type crystal selector according to claim 4, it is characterised in that：The Z-type structure selects brilliant section （6）A diameter of 2mm-6mm.
- A kind of 6. improved high-efficiency Z-type crystal selector according to claim 1, it is characterised in that：The changeover portion（7）Height Spend for 20mm-35mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042062.9A CN107574472A (en) | 2017-10-31 | 2017-10-31 | A kind of improved high-efficiency Z-type crystal selector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711042062.9A CN107574472A (en) | 2017-10-31 | 2017-10-31 | A kind of improved high-efficiency Z-type crystal selector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396714A (en) * | 2019-09-09 | 2019-11-01 | 泰州市金鹰精密铸造有限公司 | A kind of novel combination type Z-type crystal selector |
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| CN203418085U (en) * | 2013-07-19 | 2014-02-05 | 江苏永瀚特种合金技术有限公司 | Combined die structure for casting single crystal blades |
| CN103834990A (en) * | 2014-03-20 | 2014-06-04 | 北京科技大学 | Crystal selector for preparing directional solidification material and application thereof |
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| CN104826995A (en) * | 2015-05-25 | 2015-08-12 | 东方电气集团东方汽轮机有限公司 | Vertical ceramic mold shell and molding method thereof |
| CN105170909A (en) * | 2015-10-10 | 2015-12-23 | 贵阳中航动力精密铸造有限公司 | Pouring system for hollow single crystal blade |
| CN105839186A (en) * | 2016-06-03 | 2016-08-10 | 西北工业大学 | Method of repeatedly using seed crystals to prepare monocrystalline high-temperature alloy |
| CN207659554U (en) * | 2017-10-31 | 2018-07-27 | 泰州市金鹰精密铸造有限公司 | A kind of improved high-efficiency Z-type crystal selector |
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2017
- 2017-10-31 CN CN201711042062.9A patent/CN107574472A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203418085U (en) * | 2013-07-19 | 2014-02-05 | 江苏永瀚特种合金技术有限公司 | Combined die structure for casting single crystal blades |
| CN103834990A (en) * | 2014-03-20 | 2014-06-04 | 北京科技大学 | Crystal selector for preparing directional solidification material and application thereof |
| CN103894539A (en) * | 2014-03-31 | 2014-07-02 | 东方电气集团东方汽轮机有限公司 | Method for preparing wax mold of monocrystal spiral crystal selector |
| CN104826995A (en) * | 2015-05-25 | 2015-08-12 | 东方电气集团东方汽轮机有限公司 | Vertical ceramic mold shell and molding method thereof |
| CN105170909A (en) * | 2015-10-10 | 2015-12-23 | 贵阳中航动力精密铸造有限公司 | Pouring system for hollow single crystal blade |
| CN105839186A (en) * | 2016-06-03 | 2016-08-10 | 西北工业大学 | Method of repeatedly using seed crystals to prepare monocrystalline high-temperature alloy |
| CN207659554U (en) * | 2017-10-31 | 2018-07-27 | 泰州市金鹰精密铸造有限公司 | A kind of improved high-efficiency Z-type crystal selector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396714A (en) * | 2019-09-09 | 2019-11-01 | 泰州市金鹰精密铸造有限公司 | A kind of novel combination type Z-type crystal selector |
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