CN106270392A - A kind of manufacture method of single crystal super alloy working-blade - Google Patents
A kind of manufacture method of single crystal super alloy working-blade Download PDFInfo
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- CN106270392A CN106270392A CN201510271331.3A CN201510271331A CN106270392A CN 106270392 A CN106270392 A CN 106270392A CN 201510271331 A CN201510271331 A CN 201510271331A CN 106270392 A CN106270392 A CN 106270392A
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Abstract
The present invention relates to a kind of blade manufacture method, the manufacture method of a kind of single crystal super alloy working-blade, it includes step in detail below: the preparation of step one, working-blade wax-pattern and combination；Prepared by step 2, formwork；Step 3, determine that drawing velocity is interval；Step 4, blade forming.Use the change withdrawing rate technique of the present invention, in the variable cross-section listrium position that stray crystal easily occurs, reduce withdrawing rate, be effectively reduced listrium stray crystal and formed.Meanwhile, use and become withdrawing rate technique, in the case of ensureing single crystal blade monocrystalline integrity, reduce the single crystal blade founding time, control blade preparation cost.
Description
Technical field: the invention belongs to Ni based single-crystal high-temperature alloy field, is specially a kind of monocrystalline
The manufacture method of high-temperature alloy blades.
Background technology: make a general survey of advanced aero engine development course in recent decades, development tool
The single crystal turbine blade having complicated air cooling passage has become as and continues to lift up advanced aero engine
The effective means of crucial hot-end component overall performance and inexorable trend.But, contain along with novel
Emerging in large numbers and the advanced maximization of turbo blade size and answering of structure of Re single crystal super alloy
Hydridization, the preparation cost of single crystal super alloy blade increases substantially, so that optimize orientation
Solidifying process, reduces the casting flaws such as stray crystal, strictly controls the integrity of monocrystalline, improves single
Brilliant blade yield rate, reaches to control the purpose of cost, it is achieved the industrial applications of single crystal blade.
Specifically, novel single crystal super alloy with the addition of substantial amounts of refractory element and rare precious metal unit
Element, causes and easily generates the defects such as stray crystal in single crystal super alloy casting process；Additionally, first
Entering single crystal turbine blade complex contour, inside is hollow air cooling structure, and cross sectional shape is changeable, enters
During one step induction single crystal preparation, defect formability increases.And it is strict in single crystal super alloy
Limit the use of boundary-strengthening element C, B, Hf, make this destruction monocrystalline integrity of crystal boundary
Casting flaw be easier to become the weak structure during single crystal casting high-temperature service, reduce leaf
In the service life of sheet, cause blade to be scrapped in advance, increase considerably the preparation cost of blade.
Therefore, optimize directional solidification processes, reduce the casting flaws such as stray crystal, strictly control monocrystalline
Integrity, improves the yield rate of single crystal blade, reduces blade development cost, and realization has just
The core content of the advanced single crystal turbine blade batch production of labyrinth and key technology.
Summary of the invention: it is an object of the invention to provide the growth work of a kind of single crystal super alloy foundry goods
Skill, is primarily adapted for use in solution Directional Solidification Process of Single Crystal Superalloys owing to geometry changes
The stray crystal problem caused.
The technical scheme is that
Along with the raising of withdrawing rate, a kind of single crystal super alloy foundry goods variable cross-section listrium position by
Stray crystal gradually occurs.But, when withdrawing rate is too low, cause the single crystal blade casting solidification cycle
Increase, have a strong impact on blade preparation efficiency, make single crystal blade production cost improve.
Therefore, the technique becoming withdrawing rate is used, at the blade variable cross-section edge that stray crystal easily occurs
Board position, reduces withdrawing rate, reduces stray crystal formability.
A kind of manufacture method of single crystal super alloy working-blade, it includes step in detail below:
The preparation of step one, working-blade wax-pattern and combination
With wax for raw material mould compacting blade wax part and running gate system, then by described blade
Wax part and running gate system are combined forming blade wax mould group；
Prepared by step 2, formwork
Preparing material with formwork and above-mentioned blade wax mould group is wrapped to form formwork, formwork is common
Having 7 layers, wherein the 1st layer is 70 mesh, and the 2nd layer is 36 mesh, and 3-7 layer is 24 mesh；Will
Formwork after parcel is placed in hot stove and carries out dewaxing treatment；
Step 3, determine that drawing velocity is interval
Use casting process simulation simulation software that blade grain structure distribution situation is simulated calculating point
Analysis, the drawing velocity used in the calculation is respectively 1,2,3,4,6,9mm/min, and
Above-mentioned different drawing velocity exports the result of blade grain structure distribution situation respectively, works as leaf
When sheet crystal grain tissue distribution patterns result is shown as monocrystalline, the drawing velocity conduct that this result is corresponding
Drawing velocity to be chosen, and will drawing velocity medium velocity maximum be chosen as the upper limit, speed
Minima is as lower limit, using interval for adjustment as drawing velocity between upper and lower limit；
Step 4, blade forming
Formwork is heated and pours into a mould, when, after casting complete, taking out as initial using upper limit speed
Pulling rate degree is operated blade cooling, reduces pull speed when being cooled to close to blade listrium position
Degree, after blade listrium position has cooled down, is promoted to upper limit speed by drawing velocity, to complete
Become single crystal blade molding.
The invention has the beneficial effects as follows:
Use and become withdrawing rate technique, in the variable cross-section listrium position that stray crystal easily occurs, reduce
Withdrawing rate, is effectively reduced listrium stray crystal and is formed.Meanwhile, use and become withdrawing rate technique,
In the case of ensureing single crystal blade monocrystalline integrity, reduce the single crystal blade founding time, control
Blade preparation cost.
From working-blade structure it can be seen that blade and listrium belong to variable section structure, improving
While working-blade production efficiency, it is necessary to ensure that variable cross-section position.Blade grain structure is distributed
Result of calculation will be wherein analyzed by situation without stray crystal, and result shows, 1,2mm/min
Low withdrawing rate under, the crystal grain that crystal selector 3 is selected can be grown into monocrystalline leaf by changeover portion 2
Sheet 1, and formed without stray crystal.When withdrawing rate increases to 4mm/min, at listrium edge
Initially form stray crystal.Along with the continuation of withdrawing rate increases, quantity and the size of stray crystal are the most continuous
Increasing, the crystal grain selected cannot be grown into listrium.
Accompanying drawing illustrates:
Fig. 1 is individual blade modular structure schematic diagram；
Fig. 2 is blade module overall structure schematic diagram；
1-single crystal blade, 2-changeover portion, 3-crystal selector, 4-running gate system.
Detailed description of the invention
In order to study the process that in listrium, grain growth behavior and stray crystal are formed, use and there is typical case
The monocrystalline high-pressure turbine working blade of variable cross-section listrium is object of study, and blade assembled scheme is three-dimensional
Fig. 1 is shown in by model.Module specifically includes that single crystal blade 1, changeover portion 2, crystal selector 3, cast
System 4, single crystal blade 1 and changeover portion 2 rounding off, brilliant with screw selecting bottom changeover portion 2
Device 3 connects, and module uses bottom pouring type pouring, molten metal is entered crystal selector 3 by cross gate 4
Top, bottom-up respectively enters crystal selector 3, changeover portion 2 and single crystal blade 1.
A kind of manufacture method of single crystal super alloy working-blade, it includes step in detail below:
The preparation of step one, working-blade wax-pattern and combination
With wax for raw material mould compacting blade wax part and running gate system, then by described blade
Wax part and running gate system are combined forming blade wax mould group；
Prepared by step 2, formwork
Preparing material with formwork and above-mentioned blade wax mould group is wrapped to form formwork, formwork is common
Having 7 layers, formwork is prepared material and is included Ludox and EC95 powder, the EC95 powder used by each layer
Granularity is different, and wherein the 1st layer is 70 mesh, and the 2nd layer is 36 mesh, and 3-7 layer is 24 mesh；
Formwork after parcel is placed in hot stove and carries out dewaxing treatment；
Step 3, employing casting process simulation simulation software (such as, ProCAST) are to blade crystal grain group
Knit distribution situation and be simulated computational analysis, the drawing velocity used in the calculation is respectively 1,
2,3,4,6,9mm/min, and above-mentioned different drawing velocity exports blade crystal grain respectively
The result of tissue distribution patterns, when blade grain structure distribution situation result is shown as monocrystalline,
Drawing velocity corresponding to this result, and will be in drawing velocity be chosen as drawing velocity to be chosen
Speed maximum as the upper limit, speed minima as lower limit, using between upper and lower limit as taking out
The adjustment of pulling rate degree is interval；
Step 4, blade forming
Formwork is heated and pours into a mould, when, after casting complete, taking out as initial using upper limit speed
Pulling rate degree is operated blade cooling, reduces pull speed when being cooled to close to blade listrium position
Degree, after blade listrium position has cooled down, is promoted to upper limit speed by drawing velocity, to complete
Become single crystal blade molding.
Claims (3)
1. the manufacture method of a single crystal super alloy working-blade, it is characterised in that include following
Concrete steps:
The preparation of step one, working-blade wax-pattern and combination
With wax for raw material mould compacting blade wax part and running gate system, then by described blade
Wax part and running gate system are combined forming blade wax mould group；
Prepared by step 2, formwork
Preparing material with formwork and above-mentioned blade wax mould group is wrapped to form formwork, formwork is common
Having 7 layers, wherein the 1st layer is 70 mesh, and the 2nd layer is 36 mesh, and 3-7 layer is 24 mesh；Will
Formwork after parcel is placed in hot stove and carries out dewaxing treatment；
Step 3, employing casting process simulation simulation software (such as, ProCAST) are to blade crystal grain group
Knit distribution situation and be simulated computational analysis, the drawing velocity used in the calculation is respectively 1,
2,3,4,6,9mm/min, export blade crystal grain respectively with above-mentioned different drawing velocity
Tissue distribution patterns result, when blade grain structure distribution situation result is shown as monocrystalline, should
Drawing velocity corresponding to result, and will drawing velocity middling speed be chosen as drawing velocity to be chosen
Degree maximum as the upper limit, speed minima as lower limit, using between upper and lower limit as pull
The adjustment of speed is interval；
Step 4, blade forming
Formwork is heated and pours into a mould, when, after casting complete, taking out as initial using upper limit speed
Pulling rate degree is operated blade cooling, reduces pull speed when being cooled to close to blade listrium position
Degree, after blade listrium position has cooled down, is promoted to upper limit speed by drawing velocity, to complete
Become single crystal alloy working-blade molding.
The manufacturer of a kind of single crystal super alloy working-blade the most according to claim 1
Method, it is characterised in that: described casting process simulation simulation software uses ProCAST.
The manufacturer of a kind of single crystal super alloy working-blade the most according to claim 1
Method, it is characterised in that: formwork is prepared material and is included Ludox and EC95 powder, and used by each layer
The granularity of EC95 powder different.
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| CN201510271331.3A CN106270392A (en) | 2015-05-25 | 2015-05-25 | A kind of manufacture method of single crystal super alloy working-blade |
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| CN201510271331.3A CN106270392A (en) | 2015-05-25 | 2015-05-25 | A kind of manufacture method of single crystal super alloy working-blade |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557869A (en) * | 2017-08-15 | 2018-01-09 | 中国航发北京航空材料研究院 | The method for avoiding single crystal super alloy turbo blade platinum filament stud position from recrystallizing |
| CN107745093A (en) * | 2017-12-06 | 2018-03-02 | 安徽应流航源动力科技有限公司 | A kind of precise casting mold group and using its preparation can essence control crystal orientation nickel-based monocrystal stator casting method |
| CN107755636A (en) * | 2017-09-12 | 2018-03-06 | 东方电气集团东方汽轮机有限公司 | A kind of quick method for solving the casting deformation of combustion engine blade |
| CN109338455A (en) * | 2018-10-10 | 2019-02-15 | 深圳市万泽中南研究院有限公司 | Manufacturing method, system and the equipment of single crystal casting |
| CN109357646A (en) * | 2018-11-30 | 2019-02-19 | 江苏集萃先进金属材料研究所有限公司 | A kind of contact-type detection and its method of gas turbine engine blade wax-pattern |
| CN109351951A (en) * | 2018-11-29 | 2019-02-19 | 中国科学院金属研究所 | A kind of process reducing single crystal blade platform rarefaction defect |
| CN110170618A (en) * | 2019-06-19 | 2019-08-27 | 中国科学院金属研究所 | A kind of preparation method of large complicated wheel disc class formation precision castings |
| CN111299511A (en) * | 2020-04-03 | 2020-06-19 | 北航（四川）西部国际创新港科技有限公司 | Preparation method of single crystal high-temperature alloy thin-wall casting |
| CN111496187A (en) * | 2020-05-09 | 2020-08-07 | 中国航发北京航空材料研究院 | Precision investment casting method for single crystal duplex hollow guide blade |
| CN114309470A (en) * | 2021-12-31 | 2022-04-12 | 江苏永瀚特种合金技术股份有限公司 | Method for eliminating dendritic crystal broken arm defects at single crystal blade edge plate through temperature field regulation |
| CN114799047A (en) * | 2022-05-16 | 2022-07-29 | 西北工业大学 | Multilayer module superposed wax mold structure and method for efficiently preparing single crystal blade by using same |
| CN115047160A (en) * | 2022-04-28 | 2022-09-13 | 上海交通大学 | Device and method for evaluating casting performance of single crystal high-temperature alloy |
| CN115351224A (en) * | 2022-08-16 | 2022-11-18 | 江苏永瀚特种合金技术股份有限公司 | Method for solving problem of wall thickness of complex hollow single crystal blade |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557869A (en) * | 2017-08-15 | 2018-01-09 | 中国航发北京航空材料研究院 | The method for avoiding single crystal super alloy turbo blade platinum filament stud position from recrystallizing |
| CN107755636A (en) * | 2017-09-12 | 2018-03-06 | 东方电气集团东方汽轮机有限公司 | A kind of quick method for solving the casting deformation of combustion engine blade |
| CN107745093A (en) * | 2017-12-06 | 2018-03-02 | 安徽应流航源动力科技有限公司 | A kind of precise casting mold group and using its preparation can essence control crystal orientation nickel-based monocrystal stator casting method |
| CN109338455A (en) * | 2018-10-10 | 2019-02-15 | 深圳市万泽中南研究院有限公司 | Manufacturing method, system and the equipment of single crystal casting |
| CN109351951A (en) * | 2018-11-29 | 2019-02-19 | 中国科学院金属研究所 | A kind of process reducing single crystal blade platform rarefaction defect |
| CN109351951B (en) * | 2018-11-29 | 2020-12-22 | 中国科学院金属研究所 | Process method for reducing loosening defect of single crystal blade platform |
| CN109357646A (en) * | 2018-11-30 | 2019-02-19 | 江苏集萃先进金属材料研究所有限公司 | A kind of contact-type detection and its method of gas turbine engine blade wax-pattern |
| CN110170618A (en) * | 2019-06-19 | 2019-08-27 | 中国科学院金属研究所 | A kind of preparation method of large complicated wheel disc class formation precision castings |
| CN111299511B (en) * | 2020-04-03 | 2021-02-09 | 北航（四川）西部国际创新港科技有限公司 | Preparation method of single crystal high-temperature alloy thin-wall casting |
| CN111299511A (en) * | 2020-04-03 | 2020-06-19 | 北航（四川）西部国际创新港科技有限公司 | Preparation method of single crystal high-temperature alloy thin-wall casting |
| CN111496187A (en) * | 2020-05-09 | 2020-08-07 | 中国航发北京航空材料研究院 | Precision investment casting method for single crystal duplex hollow guide blade |
| CN114309470A (en) * | 2021-12-31 | 2022-04-12 | 江苏永瀚特种合金技术股份有限公司 | Method for eliminating dendritic crystal broken arm defects at single crystal blade edge plate through temperature field regulation |
| CN114309470B (en) * | 2021-12-31 | 2023-11-03 | 江苏永瀚特种合金技术股份有限公司 | Method for eliminating dendrite arm defects at edge plate of single crystal blade through temperature field regulation and control |
| CN115047160A (en) * | 2022-04-28 | 2022-09-13 | 上海交通大学 | Device and method for evaluating casting performance of single crystal high-temperature alloy |
| CN115047160B (en) * | 2022-04-28 | 2023-11-03 | 上海交通大学 | Device and method for evaluating casting performance of monocrystal superalloy |
| CN114799047A (en) * | 2022-05-16 | 2022-07-29 | 西北工业大学 | Multilayer module superposed wax mold structure and method for efficiently preparing single crystal blade by using same |
| CN115351224A (en) * | 2022-08-16 | 2022-11-18 | 江苏永瀚特种合金技术股份有限公司 | Method for solving problem of wall thickness of complex hollow single crystal blade |
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