CN104368764B - Hot investment casting single crystal turbine blade model process bar - Google Patents
Hot investment casting single crystal turbine blade model process bar Download PDFInfo
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- CN104368764B CN104368764B CN201410647291.3A CN201410647291A CN104368764B CN 104368764 B CN104368764 B CN 104368764B CN 201410647291 A CN201410647291 A CN 201410647291A CN 104368764 B CN104368764 B CN 104368764B
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- process bar
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- listrium
- single crystal
- bar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of hot investment casting single crystal turbine blade model process bar, for solving the technical problem of existing hot investment casting single crystal turbine blade mold strength difference.Technical scheme is process bar totally three, described Article 1 process bar, Article 2 process bar and Article 3 process bar are all in half shaped as frame, article three, process bar is added on hot investment casting single crystal turbine blade model, wherein Article 1 process bar is positioned at leaf basin side, Article 2 process bar and Article 3 process bar are positioned at blade back side, near listrium left end is Article 2 process bar, and near listrium right-hand member is Article 3 process bar.The Article 1 process bar being positioned at leaf basin side is connected with listrium middle part, and Article 1 process bar extends along the direction being perpendicular to listrium edge；By machining, three process bar, blade tip seeding section and running gate system are removed after casting complete.Owing to adding three process bar, improve the intensity of hot investment casting single crystal turbine blade model.
Description
Technical field
The present invention relates to a kind of process bar, particularly relate to a kind of hot investment casting single crystal turbine blade model process bar.
Background technology
Single crystal turbine blade in aero-engine is generally adopted directional solidification technique casting and forms, in metal liquid solidification process, owing to being subject to self freezing rate difference and the outside impact hindered, foundry goods inherently produces certain casting stress, just becomes cast-internal residual stress after cast casting molding.For this thin-wall part with labyrinth of aero engine turbine blades, residual stress is excessive mainly can cause that blade partial structurtes deform, dimension overproof, especially to this hollow thin-wall part of turbo blade, residual stress is crossed conference and is caused that local wedge angle, blade root and listrium transition position produce stress and concentrate, and reduces the service life of blade.On the other hand, residual stress distribution inequality can cause blade local residual stress excessive, and particularly residual stress does not likely result in crackle in a short time, but can crack suddenly in subsequent thermal processing process or use, can cause hardly imaginable consequence.
With reference to Fig. 1, document " the Converse solved algorithm of the high temperature alloy directional setting interface coefficient of heat transfer and application; " foundry engieering " in February, 2012 publishes, the 177th page " discloses a kind of hot investment casting single crystal turbine blade model, and this model is except Quench copper dish 9, each several part is all by waxed one-tenth, running gate system 1 is connected with the tenon 2 of blade, and blade end is blade tip seeding section 6, and blade tip seeding section 6 is connected with spiral crystal selector 7, for opening brilliant section 8 below spiral crystal selector 7, open brilliant section 8 and be connected with Quench copper dish 9.What use in single crystal blade directional solidification is tested is typical model, running gate system is connected with the tenon position of blade wax mould by running channel, it it is blade tip seeding section bottom blade wax mould, it is followed successively by spiral crystal selector and Quench copper dish below blade tip seeding section, removes running gate system by machining after this model is poured into a mould and blade tip seeding section can obtain single crystal turbine blade.In this conventional model, there is the abrupt change of cross-section in blade and listrium junction, there is bigger stress and concentrates, and listrium place easily cracks.
In Foundry Production, usually adopt the means of adding technology muscle to improve thin-wall part and fill type, exhaust conditions, it is prevented that produce the defect such as misrun and crack deformation.But for this hollow thin-wall part with labyrinth of single crystal turbine blade, hot investment casting model not yet exists the use of process bar.
Summary of the invention
In order to overcome the deficiency of existing hot investment casting single crystal turbine blade mold strength difference, the present invention provides a kind of hot investment casting single crystal turbine blade model process bar.This process bar totally three, described Article 1 process bar, Article 2 process bar and Article 3 process bar are all in half shaped as frame, article three, process bar is added on hot investment casting single crystal turbine blade model, wherein Article 1 process bar is positioned at leaf basin side, Article 2 process bar and Article 3 process bar are positioned at blade back side, near listrium left end is Article 2 process bar, and near listrium right-hand member is Article 3 process bar.The Article 1 process bar being positioned at leaf basin side is connected with listrium middle part, and Article 1 process bar extends along the direction being perpendicular to listrium edge；By machining, three process bar, blade tip seeding section and running gate system are removed after casting complete.Owing to adding three process bar, improve the intensity of hot investment casting single crystal turbine blade model.
The technical solution adopted for the present invention to solve the technical problems is: a kind of hot investment casting single crystal turbine blade model process bar, it is characterized in described process bar totally three, Article 1, process bar 10, Article 2 process bar 11 and Article 3 process bar 12 are all in half shaped as frame, article three, process bar is added on hot investment casting single crystal turbine blade model, wherein Article 1 process bar 10 is positioned at leaf basin 5 side, Article 2 process bar 11 and Article 3 process bar 12 are positioned at blade back 4 side, near listrium 3 left end is Article 2 process bar 11, and near listrium 3 right-hand member is Article 3 process bar 12.The Article 1 process bar 10 being positioned at leaf basin 5 side is connected with listrium 3 middle part, and Article 1 process bar 10 extends along the direction being perpendicular to listrium 3 edge；The Article 2 process bar 11 being positioned at blade back 4 side is connected with listrium 3 left end, and Article 2 process bar 11 extends along the direction being perpendicular to listrium 3 edge；The Article 3 process bar 12 being positioned at blade back 4 side is connected with listrium 3 right-hand member, and Article 3 process bar 12 extends along the direction being perpendicular to listrium 3 edge.Meanwhile, the Article 1 process bar 10 being positioned at leaf basin 5 side is connected with blade tip seeding section 6 middle part, draws from the normal direction of this camber line；The Article 2 process bar 11 being positioned at blade back 4 side is connected with blade tip seeding section 6 left end, draws from the normal direction of this camber line；The Article 3 process bar 12 being positioned at blade back 4 side is connected with blade tip seeding section 6 right-hand member, draws from the normal direction of this camber line.Article three, process bar all not with other location contacts except listrium 3 and blade tip seeding section 6.
The invention has the beneficial effects as follows: this process bar totally three, described Article 1 process bar, Article 2 process bar and Article 3 process bar are all in half shaped as frame, article three, process bar is added on hot investment casting single crystal turbine blade model, wherein Article 1 process bar is positioned at leaf basin side, Article 2 process bar and Article 3 process bar are positioned at blade back side, near listrium left end is Article 2 process bar, and near listrium right-hand member is Article 3 process bar.The Article 1 process bar being positioned at leaf basin side is connected with listrium middle part, and Article 1 process bar extends along the direction being perpendicular to listrium edge；By machining, three process bar, blade tip seeding section and running gate system are removed after casting complete.Owing to adding three process bar, improve the intensity of hot investment casting single crystal turbine blade model.
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is the structural representation of background technology hot investment casting single crystal turbine blade model (containing running gate system and Quench copper dish).
Fig. 2 is the structural representation of hot investment casting single crystal turbine blade model process bar of the present invention.
Fig. 3 is the top view of hot investment casting single crystal turbine blade model process bar of the present invention.
Fig. 4 is the bottom view of hot investment casting single crystal turbine blade model process bar of the present invention.
Fig. 5 is the structural representation that first process bar in leaf basin side of the present invention is drawn from listrium middle part.
Fig. 6 is the structural representation that first process bar in leaf basin side of the present invention is drawn from blade tip seeding section.
Fig. 7 is the structural representation that second, third root process bar of blade back side of the present invention is drawn from listrium two-end part.
Fig. 8 is the structural representation that second, third root process bar of blade back side of the present invention is drawn from blade tip seeding section.
In figure, 1-running gate system, 2-tenon, 3-listrium, 4-blade back, 5-leaf basin, 6-blade tip seeding section, 7-spiral crystal selector, 8-opens brilliant section, 9-Quench copper dish, 10-Article 1 process bar, 11-Article 2 process bar, 12-Article 3 process bar.
Detailed description of the invention
Following example are with reference to Fig. 2～8.
Hot investment casting single crystal turbine blade model process bar of the present invention totally three, every process bar is half shaped as frame, article three, process bar is added on former hot investment casting single crystal turbine blade model, wherein Article 1 process bar 10 is positioned at leaf basin 5 side, Article 2 process bar 11 and Article 3 process bar 12 are positioned at blade back 4 side, near listrium 3 left end is Article 2 process bar 11, and near listrium 3 right-hand member is Article 3 process bar 12.
The Article 1 process bar 10 being positioned at leaf basin 5 side is connected with listrium 3 middle part, and Article 1 process bar 10 extends along the direction being perpendicular to listrium 3 edge；The Article 2 process bar 11 being positioned at blade back 4 side is connected with listrium 3 left end, and process bar 11 extends along the direction being perpendicular to listrium 3 edge；The Article 3 process bar 12 being positioned at blade back 4 side is connected with listrium 3 right-hand member, and process bar 12 extends along the direction being perpendicular to listrium 3 edge.
The Article 1 process bar 10 being positioned at leaf basin 5 side is connected with blade tip seeding section 6 middle part, draws from the normal direction of this camber line；The Article 2 process bar 11 being positioned at blade back 4 side is connected with blade tip seeding section 6 left end, draws from the normal direction of this camber line；The Article 3 process bar 12 being positioned at blade back 4 side is connected with blade tip seeding section 6 right-hand member, draws from the normal direction of this camber line.Article three, process bar all not with other location contacts except listrium 3 and blade tip seeding section 6.
When producing, three process bar wax-patterns are added on the wax-pattern of former hot investment casting single crystal turbine blade, obtain new wax-pattern, it is then coated with refractory material and mud, carry out roasting after drying and can obtain model, then just can pour into a mould, by machining, three process bar, blade tip seeding section 6 and running gate system 1 be removed after casting complete.
Claims (1)
1. a hot investment casting single crystal turbine blade model process bar, it is characterized in that: described process bar totally three, Article 1, process bar (10), Article 2 process bar (11) and Article 3 process bar (12) are all in half shaped as frame, article three, process bar is added on hot investment casting single crystal turbine blade model, wherein Article 1 process bar (10) is positioned at leaf basin (5) side, Article 2 process bar (11) and Article 3 process bar (12) are positioned at blade back (4) side, near listrium (3) left end is Article 2 process bar (11), near listrium (3) right-hand member is Article 3 process bar (12)；The Article 1 process bar (10) being positioned at leaf basin (5) side is connected with listrium (3) middle part, and Article 1 process bar (10) extends along the direction being perpendicular to listrium (3) edge；The Article 2 process bar (11) being positioned at blade back (4) side is connected with listrium (3) left end, and Article 2 process bar (11) extends along the direction being perpendicular to listrium (3) edge；The Article 3 process bar (12) being positioned at blade back (4) side is connected with listrium (3) right-hand member, and Article 3 process bar (12) extends along the direction being perpendicular to listrium (3) edge；Meanwhile, the Article 1 process bar (10) being positioned at leaf basin (5) side is connected with blade tip seeding section (6) middle part, draws from the normal direction of blade tip seeding section (6) middle part camber line；The Article 2 process bar (11) being positioned at blade back (4) side is connected with blade tip seeding section (6) left end, draws from the normal direction of blade tip seeding section (6) left end camber line；The Article 3 process bar (12) being positioned at blade back (4) side is connected with blade tip seeding section (6) right-hand member, draws from the normal direction of blade tip seeding section (6) right-hand member camber line；Article three, process bar all not with other location contacts except listrium (3) and blade tip seeding section (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410647291.3A CN104368764B (en) | 2014-11-14 | 2014-11-14 | Hot investment casting single crystal turbine blade model process bar |
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| CN201410647291.3A CN104368764B (en) | 2014-11-14 | 2014-11-14 | Hot investment casting single crystal turbine blade model process bar |
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| CN104368764A CN104368764A (en) | 2015-02-25 |
| CN104368764B true CN104368764B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108097909B (en) * | 2016-11-25 | 2020-06-16 | 中国科学院金属研究所 | Process method for eliminating recrystallization of single crystal high-temperature alloy casting |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10033688A1 (en) * | 2000-07-11 | 2002-01-24 | Alstom Power Nv | Producing a rigid cast part used as gas turbine blade comprises connecting the overhang or cross-section extension with a single crystal guide or a transition piece with a single crystal starter or another suitable site of the cast part |
| CN103212670A (en) * | 2012-01-24 | 2013-07-24 | 斯奈克玛 | Shell mold for manufacturing aircraft turbine blade element by lost wax casting |
| CN103861999A (en) * | 2014-03-26 | 2014-06-18 | 东方电气集团东方汽轮机有限公司 | Method for improving bottom deformation of multi-cavity ceramic die shell in directional solidification process |
| CN204321097U (en) * | 2014-11-14 | 2015-05-13 | 西北工业大学 | Hot investment casting single crystal turbine blade model process bar |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU123355U1 (en) * | 2012-07-31 | 2012-12-27 | Российская Федерация, от имени которой выступает государственный заказчик - Министерство промышленности и торговли Российской Федерации (Минпромторг России) | DEVICE FOR OBTAINING A SHOWER CASTING WITH A SINGLE CRYSTAL STRUCTURE |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10033688A1 (en) * | 2000-07-11 | 2002-01-24 | Alstom Power Nv | Producing a rigid cast part used as gas turbine blade comprises connecting the overhang or cross-section extension with a single crystal guide or a transition piece with a single crystal starter or another suitable site of the cast part |
| CN103212670A (en) * | 2012-01-24 | 2013-07-24 | 斯奈克玛 | Shell mold for manufacturing aircraft turbine blade element by lost wax casting |
| CN103861999A (en) * | 2014-03-26 | 2014-06-18 | 东方电气集团东方汽轮机有限公司 | Method for improving bottom deformation of multi-cavity ceramic die shell in directional solidification process |
| CN204321097U (en) * | 2014-11-14 | 2015-05-13 | 西北工业大学 | Hot investment casting single crystal turbine blade model process bar |
Non-Patent Citations (1)
| Title |
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| 典型铸件的特殊铸造工艺筋设计;杨大春;《热加工工艺》;20130930;第42卷(第17期);第61-64页 * |
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