CN100577323C - A kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine - Google Patents
A kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine Download PDFInfo
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- CN100577323C CN100577323C CN200610046386A CN200610046386A CN100577323C CN 100577323 C CN100577323 C CN 100577323C CN 200610046386 A CN200610046386 A CN 200610046386A CN 200610046386 A CN200610046386 A CN 200610046386A CN 100577323 C CN100577323 C CN 100577323C
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Abstract
A kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine, comprise process for making shell: the slurry of 80～100 order emergies or 16～24 order bastard coal stone sands and Ludox being made different viscosities, the sand coating is hung in the starching that wax-pattern carries out successively, and total number of plies is controlled between 12～14 layers; Soak with the own fat of silicic acid at last; Dewaxing technique: pressure 0.5～0.7Mpa, 150～170 ℃ of temperature, 6～10 minutes time; Roasting technique: 300～500 ℃ 4～5 hours, 930 ± 10 ℃ 4 hours.When the shell of preparing with this method is used for the casting of heavy duty gas turbine rectification support plate, can have high rate of finished products.
Description
Technical field:
The present invention relates to the manufacturing technology of heavy duty gas turbine rectification support plate, a kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine is provided especially.
Background technology:
The rectification support plate is one of heavy combustion engine engine critical piece, plays important effect in the combustion machine, adopts the vacuum pouring of K4191 alloy usually.Because rectification support plate part shape complexity, size are big, foundry goods is heavy, the casting thermal center is many, the restriction of equipment melting is arranged again, so, increased the difficulty of Combination Design and casting technique.And the research of casting technique is very necessary, if casting technological parameter is incorrect, can cause metallurgical imperfection, and foundry goods is scrapped, if blindly produce, can cause very large economy loss.Shell manufacturing process is an important link in the casting technique, because the height of investment shell intensity directly influences the qualification rate of foundry goods, investment shell intensity is too high, deformability missionary society causes the drawing crack of thin-walled place and the clear shell difficulty of part, if investment shell intensity is low excessively, cannot stand the impact of molten steel, crackle appears in shell can cause scrapping of part, so the shell manufacturing process must strict control.
Summary of the invention:
The object of the present invention is to provide a kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine, when the shell of preparing with this method is used for the casting of heavy duty gas turbine rectification support plate, can have high rate of finished products.
The present invention specifically provides a kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine, it is characterized in that, comprises following processing step:
---process for making shell:
80～100 order emergies or 16～24 order bastard coal stone sands and Ludox are made the slurry of different viscosities, wax-pattern is carried out successively starching hang sand and apply, total number of plies is controlled between 12～14 layers; Concrete parameter is:
Ground floor, 25～30 seconds emergy slurry of viscosity is hung emergy, airdrying time 8～14 hours;
The second layer, 9～12 seconds emergy slurry of viscosity is hung emergy, airdrying time 6～12 hours;
The 3rd layer, 9～12 seconds emergy slurry of viscosity is hung emergy, air-dry time 5～7 hours;
The the 4th～14 layer, 12～16 seconds gangue mortar material of viscosity, air-dry time 3～5 hours;
Soak with silicic acid fat at last;
---dewaxing technique:
Pressure 0.5～0.7Mpa, 150～170 ℃ of temperature, 6～10 minutes time;
---roasting technique:
300～500 ℃ 4～5 hours, 930 ± 10 ℃ 2～4 hours.
In the manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine of the present invention, be preferably in the 8th layer after on the shell surface bondage iron wire.
The heavy duty gas turbine rectification support plate shell that process the inventive method is prepared, intensity is reasonable, and existing good deformability can be withstood the impact of molten steel simultaneously again, thereby guaranteed when being used for the casting of heavy duty gas turbine rectification support plate, can have high rate of finished products.
Description of drawings:
Fig. 1 is a shell roasting technique parameter;
Fig. 2 is the Ug modeling;
Fig. 3 is the assembled scheme of wax-pattern and running gate system.
The specific embodiment:
Embodiment 1
At first, carry out computer Ug modeling (see figure 2), carry out the software design of wax-pattern combination and running gate system position again according to the drawing specification requirement.Then, come the verifying software design whether reasonable,, adjust repeatedly and then definite optimum process parameters through simulation with computer simulation.Determine the assembled scheme (see figure 3) of wax-pattern and running gate system at last.Carry out the shell manufacturing by this assembled scheme.
One process for making shell:
Coating process flow process: see Table 1
Table 1
Annotate: on the shell surface, tie up iron wire after the 8th layer.
Two dewaxing technique rules: pressure 0.6MPa, 150 ℃ of temperature, time 10.
Three shell roasting techniques: see Fig. 1
Four smelting technologies
With the shell cast heavy duty gas turbine rectification support plate of method for preparing, this part group heavily is 110Kg, and material adopts the K4191 high-temperature nickel-base alloy, vacuum melting, and vacuum pouring, 1430～1450 ℃ of pouring temperatures, rising head is protected with the asbestic blanket insulation and is contracted.Finished product detects with X-ray and fluorescence method, does not conceal defects, and ten products are all qualified.
Table 2K4191 high-temperature nickel-base alloy
Embodiment 2
Difference from Example 1 is that coating process sees Table 3,300～500 ℃ of roasting techniques 5 hours, 930 ± 10 ℃ 2 hours.
Table 3
Claims (2)
1, a kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine is characterized in that, comprises following processing step:
---process for making shell:
80～100 order emergies or 16～24 order bastard coal stone sands and Ludox are made the slurry of different viscosities, wax-pattern is carried out successively starching hang sand and apply, total number of plies is controlled between 12～14 layers; Concrete parameter is:
Ground floor, 25～30 seconds emergy slurry of viscosity is hung emergy, airdrying time 8～14 hours;
The second layer, 9～12 seconds emergy slurry of viscosity is hung emergy, airdrying time 6～12 hours;
The 3rd layer, 9～12 seconds emergy slurry of viscosity is hung emergy, air-dry time 5～7 hours;
The the 4th～14 layer, 12～16 seconds gangue mortar material of viscosity, air-dry time 3～5 hours;
Soak with the own fat of silicic acid at last;
---dewaxing technique:
Pressure 0.5～0.7Mpa, 150～170 ℃ of temperature, 6～10 minutes time;
---roasting technique:
300～500 ℃ 4～5 hours, 930 ± 10 ℃ 4 hours.
2, according to the manufacture method of the described commutating support plate shaped shell of accurate casting heavy type combustion turbine of claim 1, it is characterized in that: after the 8th layer on the shell surface bondage iron wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610046386A CN100577323C (en) | 2006-04-25 | 2006-04-25 | A kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200610046386A CN100577323C (en) | 2006-04-25 | 2006-04-25 | A kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine |
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| Publication Number | Publication Date |
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| CN101062517A CN101062517A (en) | 2007-10-31 |
| CN100577323C true CN100577323C (en) | 2010-01-06 |
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| CN200610046386A Expired - Fee Related CN100577323C (en) | 2006-04-25 | 2006-04-25 | A kind of manufacture method of commutating support plate shaped shell of accurate casting heavy type combustion turbine |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927321B (en) * | 2010-09-03 | 2011-12-21 | 北京钢研高纳科技股份有限公司 | Method for preparing high-air permeability and high-strength ceramic shell mold for anti-gravity casting |
| CN102091757B (en) * | 2010-12-30 | 2013-01-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Integral precision casting method for large thin-wall casing part |
| CN102974748B (en) * | 2012-11-29 | 2015-03-11 | 沈阳铸造研究所 | Precise casting method of ceramic mould of turbine casing, namely critical component of heavy-duty gas turbine |
| CN104493092A (en) * | 2014-12-15 | 2015-04-08 | 贵州安吉航空精密铸造有限责任公司 | Manufacturing method of reinforcing large-scale aluminum alloy molten mold shell |
| CN108421523A (en) * | 2018-04-02 | 2018-08-21 | 中科京投环境科技江苏有限公司 | A kind of preparation method for inhaling mercury porous ceramics block materials |
| CN114210927B (en) * | 2021-12-31 | 2024-06-11 | 毕普帕罗洛江苏工程技术有限公司 | Shell layer reinforcing process for inhibiting shell cracking |
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2006
- 2006-04-25 CN CN200610046386A patent/CN100577323C/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| 中华人民共和国航空行业标准 熔模铸造涂料性能试验方法 第1部分：粘度的测定. 1-2，国防科学技术工业委员会. 2004 |
| 中华人民共和国航空行业标准 熔模铸造涂料性能试验方法 第1部分：粘度的测定. 1-2，国防科学技术工业委员会. 2004 * |
| 钛熔模精铸用氧化物陶瓷型壳制壳工艺的研究. 陈玉勇等.材料工程，第8期. 1999 |
| 钛熔模精铸用氧化物陶瓷型壳制壳工艺的研究. 陈玉勇等.材料工程，第8期. 1999 * |
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