CN105234377A - Method for solving loosening problem of directional solidification column crystal and single-crystal blade tenon and blade module - Google Patents
Method for solving loosening problem of directional solidification column crystal and single-crystal blade tenon and blade module Download PDFInfo
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- CN105234377A CN105234377A CN201510712760.XA CN201510712760A CN105234377A CN 105234377 A CN105234377 A CN 105234377A CN 201510712760 A CN201510712760 A CN 201510712760A CN 105234377 A CN105234377 A CN 105234377A
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- blade
- tenon
- directional solidification
- single crystal
- cylindrulite
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Abstract
The invention discloses a method for solving the loosening problem of a directional solidification column crystal and a single-crystal blade tenon and a blade module. Drawing parameters of a blade in the melting and pouring process are changed; the drawing speed of a tenon part is reduced; the constant speed is changed into the stage type variable drawing speed; the drawing speed is reduced in the areas of thick and large parts such as the tenon which is slowly solidified; and therefore each horizontal section is completely fed in the solidification process and then moves to be cast. The problem of loosening in the tenon is effectively solved, due to the fact that the cooling solidification speed of areas such as the blade with a thin wall is high, the drawing speed of the blade is increased, and the equipment utilization rate and the production rate are increased under the condition that the qualification rate of the blade grain size is ensured.
Description
[technical field]
The invention belongs to precision-investment casting field, be specifically related to a kind ofly solve the loose method of directional solidification cylindrulite and single crystal blade tenon and blade module.
[background technology]
The tenon of moving turbine blade, compared to listrium and blade, belongs to thick large part, and internal cooling is comparatively slow, around solidifies in advance, and tenon is inner does not have extraneous metal liquid to supplement in solidifying subsequently, causes internal defect defect to exceed standard.In equiax crystal blade casting technique, solving the loose common methods of tenon is change its pouring temperature, but can bring the metallurgical imperfection at other positions such as blade for directional solidification cylindrulite and single crystal blade, and the improvement effect loose to tenon is also not obvious.Therefore the loose problem of blade tenon inside cannot be solved by changing pouring temperature at all.
[summary of the invention]
The object of the invention is to overcome above-mentioned deficiency, there is provided a kind of and solve the loose method of directional solidification cylindrulite and single crystal blade tenon and blade module, efficiently solve tenon internal defect problem, and improve utilization rate of equipment and installations and production efficiency when ensureing blade grain size qualification rate.
In order to achieve the above object, a kind ofly solve the loose method of directional solidification cylindrulite and single crystal blade tenon, comprise the following steps:
Step one, measure the module highly for L, crystallization chassis is L to the distance of tenon lower end
1, the height of tenon is L
2, tenon upper end is L to blade tip distance
3;
Step 2, by L
1and L
3the drawing velocity of height section is set to V
1=(5 ~ 8) mm/min, L
2the drawing velocity of height section is V
2=(2 ~ 4) mm/min;
Step 3, calculates the pull time of each, T
1=L
1/ (5 ~ 8), T
2=L
2/ (2 ~ 4), T
3=L
1/ (5 ~ 8), total pull time is T=T
1+ T
2+ T
3;
Step 4, by each section of drawing velocity, each pull period and input of total pull time directional solidification furnace, directional solidification furnace carries out blade cast, namely completes and solves directional solidification cylindrulite and the loose method of single crystal blade tenon;
Step 5, by blade cuts after cast, visual and microexamination tenon internal defect defect.
A kind of blade module solving method that directional solidification cylindrulite and single crystal blade tenon loosen and adopt, comprise crystallization chassis, vertical crystallization chassis is provided with note pipe, note pipe both sides are provided with initiating terminal, initiating terminal is provided with tenon, tenon is provided with blade, and blade is connected with running channel, notes the blade of pipe both sides, tenon and initiating terminal all by note pipe specular.
Compared with prior art, the present invention changes the pull parameter in blade fusing casting process, reduce the drawing velocity of tongue portion, constant speed is changed into stage change pulling rate, slower region is solidified in this thick large part of tenon, reduce drawing velocity, casting mold is moved again after making its each horizontal cross-section obtain complete feeding in process of setting, efficiently solve tenon internal defect problem, in this wall thickness thinner region of blade, because its cooled and solidified speed is very fast, strengthen its drawing velocity, utilization rate of equipment and installations and production efficiency is improved when ensureing blade grain size qualification rate.
Further, the present invention after being cast, by blade cuts, by visual and microexamination tenon internal defect defect, can the defect of Timeliness coverage product, improve before producing next time.
[accompanying drawing explanation]
Fig. 1 is blade module of the present invention and stepwise schematic views;
In figure, 1 is note pipe, and 2 is running channel, and 3 is blade, and 4 is initiating terminal, and 5 is crystallization chassis, and 6 is tenon.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the present invention will be further described.
Solve the method that directional solidification cylindrulite and single crystal blade tenon are loose, comprise the following steps:
Step one, measure the module highly for L, crystallization chassis 5 is L to the distance of tenon 6 lower end
1, the height of tenon 6 is L
2, tenon 6 upper end is L to blade 3 top distance
3;
Step 2, by L
1and L
3the drawing velocity of height section is set to V
1=(5 ~ 8) mm/min, L
2the drawing velocity of height section is V
2=(2 ~ 4) mm/min;
Step 3, calculates the pull time of each, T
1=L
1/ (5 ~ 8), T
2=L
2/ (2 ~ 4), T
3=L
1/ (5 ~ 8), total pull time is T=T
1+ T
2+ T
3;
Step 4, by each section of drawing velocity, each pull period and input of total pull time directional solidification furnace, directional solidification furnace carries out blade cast, namely completes and solves directional solidification cylindrulite and the loose method of single crystal blade tenon;
Step 5, by blade cuts after cast, visual and microexamination tenon 4 internal defect defect.
See Fig. 1, a kind of blade module solving method that directional solidification cylindrulite and single crystal blade tenon loosen and adopt, comprise crystallization chassis 5, vertical crystallization chassis 5 is provided with note pipe 1, note pipe 1 both sides are provided with initiating terminal 4, initiating terminal 4 are provided with tenon 6, tenon 6 are provided with blade 3, blade 3 is connected with running channel 2, notes the blade 3 of pipe 1 both sides, tenon 6 and initiating terminal 4 all by note pipe 1 specular.
Embodiment 1:
The pouring procedure of certain high-pressure turbine working blade:
Step one, measure the module highly for L, crystallization chassis 5 is L to the distance of tenon 6 lower end
1, the height of tenon 6 is L
2, tenon 6 upper end is L to blade 3 top distance
3;
Step 2, by L
1and L
3the drawing velocity of height section is set to V
1=5mm/min, L
2the drawing velocity of height section is V
2=2mm/min;
Step 3, calculates the pull time of each, T
1=L
1/ 5, T
2=L
2/ 2, T
3=L
1/ 5, total pull time is T=T
1+ T
2+ T
3;
Step 4, by each section of drawing velocity, each pull period and input of total pull time directional solidification furnace, directional solidification furnace carries out blade cast, namely completes and solves directional solidification cylindrulite and the loose method of single crystal blade tenon;
Step 5, by blade cuts after cast, visual and microexamination tenon 4 internal defect defect.
Embodiment 2:
The pouring procedure of low-pressure turbine working-blade:
Step one, measure the module highly for L, crystallization chassis 5 is L to the distance of tenon 6 lower end
1, the height of tenon 6 is L
2, tenon 6 upper end is L to blade 3 top distance
3;
Step 2, by L
1and L
3the drawing velocity of height section is set to V
1=8mm/min, L
2the drawing velocity of height section is V
2=4mm/min;
Step 3, calculates the pull time of each, T
1=L
1/ 8, T
2=L
2/ 4, T
3=L
1/ 8, total pull time is T=T
1+ T
2+ T
3;
Step 4, by each section of drawing velocity, each pull period and input of total pull time directional solidification furnace, directional solidification furnace carries out blade cast, namely completes and solves directional solidification cylindrulite and the loose method of single crystal blade tenon;
Step 5, by blade cuts after cast, visual and microexamination tenon 4 internal defect defect.
Embodiment 3:
Step one, measure the module highly for L, crystallization chassis 5 is L to the distance of tenon 6 lower end
1, the height of tenon 6 is L
2, tenon 6 upper end is L to blade 3 top distance
3;
Step 2, by L
1and L
3the drawing velocity of height section is set to V
1=7mm/min, L
2the drawing velocity of height section is V
2=3mm/min;
Step 3, calculates the pull time of each, T
1=L
1/ 7, T
2=L
2/ 3, T
3=L
1/ 7, total pull time is T=T
1+ T
2+ T
3;
Step 4, by each section of drawing velocity, each pull period and input of total pull time directional solidification furnace, directional solidification furnace carries out blade cast, namely completes and solves directional solidification cylindrulite and the loose method of single crystal blade tenon;
Step 5, by blade cuts after cast, visual and microexamination tenon 4 internal defect defect.
Claims (5)
1. solve the method that directional solidification cylindrulite and single crystal blade tenon are loose, it is characterized in that, comprise the following steps:
Step one, measure the module highly for L, crystallization chassis (5) are L to the distance of tenon (6) lower end
1, the height of tenon (6) is L
2, tenon (6) upper end is L to blade (3) top distance
3;
Step 2, by L
1and L
3the drawing velocity of height section is set to V
1=(5 ~ 8) mm/min, L
2the drawing velocity of height section is V
2=(2 ~ 4) mm/min;
Step 3, calculates the pull time of each, T
1=L
1/ (5 ~ 8), T
2=L
2/ (2 ~ 4), T
3=L
1/ (5 ~ 8), total pull time is T=T
1+ T
2+ T
3;
Step 4, according to each section of drawing velocity, each pull period and total pull time, carries out blade cast by directional solidification furnace, namely completes and solves directional solidification cylindrulite and the loose method of single crystal blade tenon.
2. according to claim 1ly a kind ofly solve the loose method of directional solidification cylindrulite and single crystal blade tenon, it is characterized in that, in described step 4, after pouring into a mould, by blade cuts, visual and microexamination tenon (4) internal defect defect.
3. according to claim 1ly a kind ofly solve the loose method of directional solidification cylindrulite and single crystal blade tenon, it is characterized in that, in described step 4, each section of drawing velocity, each pull period and total pull time input directional solidification furnace are carried out blade cast.
4. a kind of blade module solving method that directional solidification cylindrulite and single crystal blade tenon loosen and adopt according to claim 1, it is characterized in that, comprise crystallization chassis (5), vertical crystallization chassis (5) is provided with note pipe (1), note pipe (1) both sides are provided with initiating terminal (4), initiating terminal (4) is provided with tenon (6), tenon (6) is provided with blade (3), blade (3) is connected with running channel (2).
5. a kind of blade module solving method that directional solidification cylindrulite and single crystal blade tenon loosen and adopt according to claim 4, it is characterized in that, described blade (3), tenon (6) and the initiating terminal (4) of managing (1) both sides noted all manages (1) specular by note.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712760.XA CN105234377A (en) | 2015-10-28 | 2015-10-28 | Method for solving loosening problem of directional solidification column crystal and single-crystal blade tenon and blade module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712760.XA CN105234377A (en) | 2015-10-28 | 2015-10-28 | Method for solving loosening problem of directional solidification column crystal and single-crystal blade tenon and blade module |
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| Publication Number | Publication Date |
|---|---|
| CN105234377A true CN105234377A (en) | 2016-01-13 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181659A1 (en) * | 2019-03-12 | 2020-09-17 | 永大科技集团有限公司 | Dual-mold housing four-chamber directional/single-crystal vacuum induction furnace device |
| CN112157223A (en) * | 2020-09-25 | 2021-01-01 | 深圳市万泽中南研究院有限公司 | Directional solidification casting method and pouring system |
| CN113894270A (en) * | 2021-09-26 | 2022-01-07 | 中国科学院金属研究所 | Prediction method for micro-porosity of high-temperature alloy isometric crystal blade or structural casting |
| 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 |
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| CN102508965A (en) * | 2011-11-03 | 2012-06-20 | 清华大学 | Adaptive variable-speed drawing simulation method for directional solidification blade production |
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| CN102836964B (en) * | 2012-08-23 | 2014-08-06 | 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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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2233229A1 (en) * | 2009-03-17 | 2010-09-29 | Rolls-Royce Plc | Single crystal casting apparatus |
| CN101934366A (en) * | 2010-08-27 | 2011-01-05 | 中国南方航空工业(集团)有限公司 | Coagulum, casting mould and feeding method for forming shrouded directional crystal turbine blade |
| 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 |
| CN102508965A (en) * | 2011-11-03 | 2012-06-20 | 清华大学 | Adaptive variable-speed drawing simulation method for directional solidification blade production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181659A1 (en) * | 2019-03-12 | 2020-09-17 | 永大科技集团有限公司 | Dual-mold housing four-chamber directional/single-crystal vacuum induction furnace device |
| CN112157223A (en) * | 2020-09-25 | 2021-01-01 | 深圳市万泽中南研究院有限公司 | Directional solidification casting method and pouring system |
| CN113894270A (en) * | 2021-09-26 | 2022-01-07 | 中国科学院金属研究所 | Prediction method for micro-porosity of high-temperature alloy isometric crystal blade or structural casting |
| 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 |
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Application publication date: 20160113 |
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