CN103252452B - A kind of equiax crystal moving turbine blade rough-cast method - Google Patents
A kind of equiax crystal moving turbine blade rough-cast method Download PDFInfo
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- CN103252452B CN103252452B CN201310195996.1A CN201310195996A CN103252452B CN 103252452 B CN103252452 B CN 103252452B CN 201310195996 A CN201310195996 A CN 201310195996A CN 103252452 B CN103252452 B CN 103252452B
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- blade
- equiax crystal
- moving turbine
- turbine blade
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Abstract
A kind of equiax crystal moving turbine blade rough-cast method, it is characterised in that: first, adopt rising pouring and top gating；Group casting equiax crystal moving turbine blade, often group 4-20 part working-blade is along blade circle distribution；Then when, uniform heat distribution consistent at homogeneous temperature, paste subsidiary structure in the blade back middle part of each blade to be cast and be connected on sprue formation feeding head, and ultimately form teeming, rising pouring and side and note hybrid running gate system；Finally, teeming, rising pouring and the side hybrid running gate system of note is used to carry out casting and obtain equiax crystal moving turbine blade spray.The Blade roughcast that said method is produced is through Ⅹ ray detection, and the rarefaction defect of blade interior is completely eliminated, and has reached the requirement of technical standard.Which solve the rarefaction defect of blade interior, greatly improve metallurgical quality and the mechanical performance of turbo blade.
Description
Technical field
The present invention relates to equiax crystal moving turbine blade casting technology field, specifically provide a kind of equiax crystal moving turbine blade rough-cast method.
Background technology
Conventional aviation equiax crystal turbo blade, its metallurgical standard all allows blade interior to there is a degree of metallurgical imperfection.But, along with increasing of new model aero-engine research and development program element, the aero-engine in new-generation is in the urgent need to improving the service behaviour of gas-turbine unit, and performance and metallurgical quality to turbo blade it is also proposed higher requirement.
The mechanism of production that blade is loose: after liquid metal is full of die cavity, now liquid metal is outwards dispelled the heat by casting mold, and along with spreading out of of heat, metal produces liquid body and shrinks, it is possible to cause that the position that foundry goods in the end solidifies produces shrinkage cavity or loose.The compactness of rarefaction defect meeting shadow leaf tissue；Reduce effective area, make mechanical performance be substantially reduced.
Equiax crystal turbo blade standard regulation in this patent, blade interior does not allow any type of rarefaction defect occur.And owing to this blade blade is without surplus cast blade, produce rarefaction defect if internal, it is impossible to removed by methods such as polishings, and standard-required does not allow repair welding.So ,-dawn blade is internal produces rarefaction defect, and blade can only be scrapped, it is impossible to saves.
The equiax crystal moving turbine blade rough-cast method that a kind of technique effect of the highly desirable acquisition of people is excellent.
Summary of the invention
It is an object of the invention to provide a kind of equiax crystal moving turbine blade rough-cast method that technique effect is excellent.
The invention provides a kind of equiax crystal moving turbine blade rough-cast method, it is characterised in that: first, adopt rising pouring and top gating；Group casting equiax crystal moving turbine blade, often group 4-20 part working-blade is along blade circle distribution；Then consistent at homogeneous temperature, when uniform heat distribution (castability in order to ensure each blade keeps-causes), in order to eliminate the rarefaction defect within blade, we paste subsidiary structure and are connected on sprue and form feeding head in the blade back middle part of each blade to be cast, and ultimately form teeming, hybrid running gate system is noted in rising pouring and side, so that break molten steel in shell solidification sequence, molten steel is made to form effective Feeding channel in casting mold, the final set district of molten steel is risen in dead head, by the excision of pouring and riser systems to obtain intact foundry goods；
Finally, teeming, rising pouring and the side hybrid running gate system of note is used to carry out casting and obtain equiax crystal moving turbine blade spray.
Described equiax crystal moving turbine blade rough-cast method, it is characterised in that: paste in blade back middle part and be connected on sprue to be formed the subsidiary structure of feeding head and be specially the trapezoid block of long 20-80mm, wide 20mm, thickness 1.5mm；This trapezoid block is connected on sprue by the cylindrical tube that internal diameter is 10mm and forms feeding head, and forms teeming, rising pouring and the side hybrid running gate system of note.
By the Blade roughcast that the method is produced, through Ⅹ ray detection, the rarefaction defect of blade interior is completely eliminated, and has reached the requirement of technical standard.
The present invention arranges the side note of feeding head, rising pouring and the hybrid-type process of teeming on blade, solves the rarefaction defect of blade interior, greatly improves metallurgical quality and the mechanical performance of turbo blade.
The mechanism of production that blade is loose: after liquid metal is full of die cavity, now liquid metal is outwards dispelled the heat by casting mold, and along with spreading out of of heat, metal produces liquid body and shrinks, it is possible to cause that the position that foundry goods in the end solidifies produces shrinkage cavity or loose.The compactness of rarefaction defect meeting shadow leaf tissue；Reduce effective area, make mechanical performance be substantially reduced.
Equiax crystal turbo blade Its Relevant Technology Standards regulation described in the technology of the present invention background: blade interior does not allow any type of rarefaction defect occur.And owing to this blade blade is without surplus cast blade.Produce rarefaction defect if internal, it is impossible to removed by methods such as polishings, and standard-required does not allow repair welding, so ,-dawn blade is internal produces rarefaction defect, and blade can only be scrapped, it is impossible to saves.
The turbo blade that the present invention relates to, its metallurgical standard requires extremely strict, on Ⅹ exograph X of ray detection, blade does not allow any type of rarefaction defect occur.In the standard of conventional blade, do not propose this requirement.Casting method of the present invention is the teeming broken traditions and bottom filling blade wax part assembled scheme, adopt side note, rising pouring and the hybrid-type process of teeming that feeding head is set on blade, solve the rarefaction defect of blade interior, greatly improve metallurgical quality and the mechanical performance of turbo blade.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is Turbine Blade Model sketch (in Fig. 1, regional extent shown in ellipse is the scope being easily generated conveying defect)；
Fig. 2 is top pouring type assembled scheme principle schematic of the prior art；
Fig. 3 is that (in Fig. 3,1 is paste subsidiary structure in the blade back middle part of each blade to be cast, and its width is 20mm, and thickness is 1.5mm for teeming of the present invention, rising pouring and the side hybrid running gate system principle schematic of note；2 is the cylindrical feeding head of the internal diameter 10mm of tubulose).
Detailed description of the invention
Embodiment 1
A kind of equiax crystal moving turbine blade rough-cast method: first, adopts rising pouring and top gating；Group casting equiax crystal moving turbine blade, often group 4-20 part working-blade is along blade circle distribution；Then consistent at homogeneous temperature, when uniform heat distribution (castability in order to ensure each blade keeps-causes), in order to eliminate the rarefaction defect within blade, we paste subsidiary structure and are connected on sprue and form feeding head in the blade back middle part of each blade to be cast, and ultimately form teeming, hybrid running gate system is noted in rising pouring and side, so that break molten steel in shell solidification sequence, molten steel is made to form effective Feeding channel in casting mold, the final set district of molten steel is risen in dead head, by the excision of pouring and riser systems to obtain intact foundry goods；
Finally, teeming, rising pouring and the side hybrid running gate system of note is used to carry out casting and obtain equiax crystal moving turbine blade spray.
In described equiax crystal moving turbine blade rough-cast method, paste in blade back middle part and be connected on sprue to be formed the subsidiary structure of feeding head and be specially the trapezoid block of long 20-80mm, wide 20mm, thickness 1.5mm；This trapezoid block is connected on sprue by the cylindrical tube that internal diameter is 10mm and forms feeding head, and forms teeming, rising pouring and the side hybrid running gate system of note.
By the Blade roughcast that the method is produced, through Ⅹ ray detection, the rarefaction defect of blade interior is completely eliminated, and has reached the requirement of technical standard.
The present embodiment arranges the side note of feeding head, rising pouring and the hybrid-type process of teeming on blade, solves the rarefaction defect of blade interior, greatly improves metallurgical quality and the mechanical performance of turbo blade.
The mechanism of production that blade is loose: after liquid metal is full of die cavity, now liquid metal is outwards dispelled the heat by casting mold, and along with spreading out of of heat, metal produces liquid body and shrinks, it is possible to cause that the position that foundry goods in the end solidifies produces shrinkage cavity or loose.The compactness of rarefaction defect meeting shadow leaf tissue；Reduce effective area, make mechanical performance be substantially reduced.
Equiax crystal turbo blade Its Relevant Technology Standards regulation described in the present embodiment technical background: blade interior does not allow any type of rarefaction defect occur.And owing to this blade blade is without surplus cast blade.Produce rarefaction defect if internal, it is impossible to removed by methods such as polishings, and standard-required does not allow repair welding, so ,-dawn blade is internal produces rarefaction defect, and blade can only be scrapped, it is impossible to saves.
The turbo blade that the present embodiment relates to, its metallurgical standard requires extremely strict, on Ⅹ exograph X of ray detection, blade does not allow any type of rarefaction defect occur.In the standard of conventional blade, do not propose this requirement.Casting method described in the present embodiment is the teeming broken traditions and bottom filling blade wax part assembled scheme, adopt side note, rising pouring and the hybrid-type process of teeming that feeding head is set on blade, solve the rarefaction defect of blade interior, greatly improve metallurgical quality and the mechanical performance of turbo blade.
Claims (1)
1. an equiax crystal moving turbine blade rough-cast method, it is characterised in that: first, adopt rising pouring and top gating；Group casting equiax crystal moving turbine blade, often group 4-20 part working-blade is around sprue circumferentially；Then when, uniform heat distribution consistent at homogeneous temperature, paste subsidiary structure in the blade back middle part of each blade to be cast and be connected on sprue formation feeding head, and ultimately form teeming, rising pouring and side and note hybrid running gate system；
Finally, teeming, rising pouring and the side hybrid running gate system of note is used to carry out casting and obtain equiax crystal moving turbine blade spray；
Paste in blade back middle part and be connected on sprue to be formed the subsidiary structure of feeding head and be specially the trapezoid block of long 20-80mm, wide 20mm, thickness 1.5mm；This trapezoid block is connected on sprue by the cylindrical tube that internal diameter is 10mm and forms feeding head, and forms teeming, rising pouring and the side hybrid running gate system of note.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310195996.1A CN103252452B (en) | 2013-05-23 | 2013-05-23 | A kind of equiax crystal moving turbine blade rough-cast method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310195996.1A CN103252452B (en) | 2013-05-23 | 2013-05-23 | A kind of equiax crystal moving turbine blade rough-cast method |
Publications (2)
| Publication Number | Publication Date |
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| CN103252452A CN103252452A (en) | 2013-08-21 |
| CN103252452B true CN103252452B (en) | 2016-06-29 |
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| CN201310195996.1A Expired - Fee Related CN103252452B (en) | 2013-05-23 | 2013-05-23 | A kind of equiax crystal moving turbine blade rough-cast method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170909B (en) * | 2015-10-10 | 2017-11-14 | 贵阳中航动力精密铸造有限公司 | A kind of running gate system for hollow single crystal blade |
| CN105290333B (en) * | 2015-12-02 | 2017-10-27 | 株洲中航动力精密铸造有限公司 | Bottom gating |
| CN108480565B (en) * | 2018-03-28 | 2020-08-11 | 中国航发北京航空材料研究院 | Pouring system for gravity pouring of large-size and thin-wall casting by using low-fluidity titanium alloy |
| CN110883314A (en) * | 2019-10-08 | 2020-03-17 | 张家港科杰机械装备有限公司 | Double-layer motor process |
| CN111421111B (en) * | 2020-05-15 | 2021-11-30 | 贵州安吉航空精密铸造有限责任公司 | Pouring channel device for investment casting process and preparation method thereof |
| CN115055645B (en) * | 2022-06-07 | 2023-10-17 | 中国航发航空科技股份有限公司 | Pouring system for a guide vane blank |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7231955B1 (en) * | 2006-01-30 | 2007-06-19 | United Technologies Corporation | Investment casting mold design and method for investment casting using the same |
| CN102019354A (en) * | 2010-12-27 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Directional solidification method of ultra-thin and long shrouded blade |
| CN201940532U (en) * | 2011-02-10 | 2011-08-24 | 山西华翔投资有限公司 | Sand mold of riser for placement of horizontal projected shoulder of casting |
| CN102836964A (en) * | 2012-08-23 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Pouring system for blade casting with thin core and crown |
-
2013
- 2013-05-23 CN CN201310195996.1A patent/CN103252452B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7231955B1 (en) * | 2006-01-30 | 2007-06-19 | United Technologies Corporation | Investment casting mold design and method for investment casting using the same |
| CN102019354A (en) * | 2010-12-27 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Directional solidification method of ultra-thin and long shrouded blade |
| CN201940532U (en) * | 2011-02-10 | 2011-08-24 | 山西华翔投资有限公司 | Sand mold of riser for placement of horizontal projected shoulder of casting |
| CN102836964A (en) * | 2012-08-23 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Pouring system for blade casting with thin core and crown |
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| CN103252452A (en) | 2013-08-21 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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