CN103273010A - Near net shape casting method of fine grain block casting turbine for lightweight gas turbine - Google Patents
Near net shape casting method of fine grain block casting turbine for lightweight gas turbine Download PDFInfo
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- CN103273010A CN103273010A CN2013101619885A CN201310161988A CN103273010A CN 103273010 A CN103273010 A CN 103273010A CN 2013101619885 A CN2013101619885 A CN 2013101619885A CN 201310161988 A CN201310161988 A CN 201310161988A CN 103273010 A CN103273010 A CN 103273010A
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Abstract
The invention discloses a near net shape casting method of a fine grain block casting turbine for a lightweight gas turbine, and particularly relates to a method used for casting a turbine of the lightweight gas turbine. The near net shape casting method is characterized by sequentially comprising the steps of: manufacturing a wax mould, installing and welding the wax mould, manufacturing a mould housing, dewaxing, roasting, casting under the condition of vibration, furnace cooling, removing the mould housing and eliminating sand grains on the surface of a casting, and cutting off a casting head. The fine grain block casting turbine for the lightweight gas turbine, cast by using the method, is capable of meeting the requirement on high temperature resistance; and the low cycle fatigue performance is improved, and the service life of the turbine is prolonged.
Description
Technical field
The present invention relates to a kind of turbine casting method.Specifically, be to cast the method that lightweight gas turbine is used turbine.
Background technology
At present, being used for casting lightweight gas turbine mainly contains with the method for turbine and makes wax-pattern, wax-pattern assembly welding, makes formwork, dewaxes, carries out roasting, casts, cools off, sloughs formwork, cuts step such as dead head.Wherein, in casting cycle, formwork is fixed on the casting bed.Because when casting, formwork maintained static, and that the design feature of turbine is blade section is thinner, the core wheel section is thicker, like this, core wheel crystal grain after the casting is thicker, and blade crystal grain is thinner, is difficult to satisfy the heat-resisting quantity of turbine, particularly low cycle fatigue property descends, and has influenced the service life of turbine.
Summary of the invention
The problem to be solved in the present invention provides a kind of lightweight gas turbine with the nearly clean shape casting method of thin brilliant block cast turbine.Adopt the turbine of this method casting, can satisfy the resistance to elevated temperatures requirement of turbine, improve low cycle fatigue property, prolong the service life of turbine.
For addressing the above problem, take following technical scheme:
Lightweight gas turbine of the present invention is to may further comprise the steps successively with the near clean shape casting method characteristics of thin brilliant block cast turbine:
Make wax-pattern earlier
Utilize mould under the pressure of 43 ~ 48 temperature of spending, 0.03 ~ 0.05Mpa, to suppress wax impeller processed;
Carry out the wax-pattern assembly welding again
Dead head and wax impeller processed are welded together, obtain module;
Afterwards, make formwork
Be coated with the extension refractory material on the module surface, form formwork on the surface;
Afterwards, dewax
Be that the steam of 95 ~ 105 degree are heated to formwork with temperature, make the wax material in the formwork melt fully, deviate from, obtain formwork;
Afterwards, carry out roasting
Formwork is put into the roaster that temperature is 940 ~ 960 degree, kept 1.8 ~ 2.2 hours;
Afterwards, cast
Arrange in vacuum furnace in 80 ~ 120 rev/mins the whirling vibration platform, it is on the adjustable whirling vibration platform of 95 ~ 105 rev/mins rotating speed that baked formwork is fixed on rotating speed, is that 1570 ~ 1590 molten metal injects in the formwork with temperature; Afterwards, make that the whirling vibration platform is forward and reverse alternately to be rotated for 3 ~ 5 seconds;
Afterwards, the formwork that is cast with molten metal is carried out taking out during to the dead head surface skining with the stove cooling;
Afterwards, remove formwork and remove the sand grains of cast(ing) surface;
Afterwards, cut dead head, obtain lightweight gas turbine block cast turbine.
Described refractory material is to be mixed together form slurry with 325 purpose zirconium English powder and Ludox, and after module put into described slurry and make it be coated with full slurry and take out, and spills zircon sand again and forms.
Take such scheme, have the following advantages:
By such scheme as can be seen, be on 80 ~ 120 rev/mins the whirling vibration platform because formwork is fixed on rotating speed, after the molten metal that with temperature is 1570 ~ 1590 injects formwork, make that the whirling vibration platform is forward and reverse alternately to be rotated for 3 ~ 5 seconds.Like this, under the vibration operating mode, cast, branch crystal grain is ruptured because of rotation, make that core increases, grain refinement, make that the crystal grain difference of the blade water the turbine foundry goods that casts out and core wheel is less and thinner, its high-temperature behavior and low cycle fatigue property improve, and prolong service life.
The specific embodiment
Be described in further details below in conjunction with the present invention of embodiment.
Embodiment one
Make wax-pattern earlier.Utilize mould under the pressure of 43 temperature of spending, 0.04Mpa, to suppress wax impeller processed.
Carry out the wax-pattern assembly welding again.Dead head and wax impeller processed are welded together, obtain module.
Afterwards, make formwork.Be coated with the extension refractory material on the module surface that combines, form formwork on the module surface.Described refractory material is to be mixed together form slurry with 325 purpose zirconium English powder and Ludox, and after module put into described slurry and make it be coated with full slurry and take out, and spills zircon sand again and forms.
Afterwards, dewax.Be that 100 degrees centigrade steam is heated to formwork with temperature, make module fusing in the formwork, deviate from, obtain formwork.
Afterwards, carry out roasting.Formwork is put into the roaster that temperature is 960 degree, kept 1.8 hours.
Afterwards, cast.Arrange in vacuum furnace in 120 rev/mins the whirling vibration platform, it is on 120 rev/mins the whirling vibration platform that baked formwork is fixed on rotating speed, is that 1570 molten metal injects in the formwork with temperature.Afterwards, make that the whirling vibration platform is forward and reverse alternately to be rotated for 4 seconds.
Afterwards, the formwork that is cast with molten metal is carried out taking out during to the dead head surface skining with the stove cooling.
Afterwards, remove formwork and remove the sand grains of cast(ing) surface.
Afterwards, cut dead head, obtain lightweight gas turbine with thin brilliant block cast turbine.
Embodiment two
Make wax-pattern earlier.Utilize mould under the pressure of 45 temperature of spending, 0.03Mpa, to suppress wax impeller processed.
Carry out the wax-pattern assembly welding again.Dead head and wax impeller processed are welded together, obtain module.
Afterwards, make formwork.Be coated with the extension refractory material on the module surface that combines, form formwork on the module surface.Described refractory material is to be mixed together form slurry with 325 purpose zirconium English powder and Ludox, and after module put into described slurry and make it be coated with full slurry and take out, and spills zircon sand again and forms.
Afterwards, dewax.Be that 105 degrees centigrade steam is heated to formwork with temperature, make module fusing in the formwork, deviate from, obtain formwork.
Afterwards, carry out roasting.Formwork is put into the roaster that temperature is 950 degree, kept 2.0 hours.
Afterwards, cast.Arrange in vacuum furnace in 80 rev/mins the whirling vibration platform, it is on 80 rev/mins the whirling vibration platform that baked formwork is fixed on rotating speed, is that 1580 molten metal injects in the formwork with temperature.Afterwards, make that the whirling vibration platform is forward and reverse alternately to be rotated for 5 seconds.
Afterwards, the formwork that is cast with molten metal is carried out taking out during to the dead head surface skining with the stove cooling.
Afterwards, remove formwork and remove the sand grains of cast(ing) surface.
Afterwards, cut dead head, obtain lightweight gas turbine with thin brilliant block cast turbine.
Embodiment three
Make wax-pattern earlier.Utilize mould under the pressure of 48 temperature of spending, 0.05Mpa, to suppress wax impeller processed.
Carry out the wax-pattern assembly welding again.Dead head and wax impeller processed are welded together, obtain module.
Afterwards, make formwork.Be coated with the extension refractory material on the module surface that combines, form formwork on the module surface.Described refractory material is to be mixed together form slurry with 325 purpose zirconium English powder and Ludox, and after module put into described slurry and make it be coated with full slurry and take out, and spills zircon sand again and forms.
Afterwards, dewax.Be that 95 degrees centigrade steam is heated to formwork with temperature, make module fusing in the formwork, deviate from, obtain formwork.
Afterwards, carry out roasting.Formwork is put into the roaster that temperature is 950 degree, kept 2.2 hours.
Afterwards, cast.Arrange in vacuum furnace in 100 rev/mins the whirling vibration platform, it is on 100 rev/mins the whirling vibration platform that baked formwork is fixed on rotating speed, is that 1590 molten metal injects in the formwork with temperature.Afterwards, make that the whirling vibration platform is forward and reverse alternately to be rotated for 3 seconds.
Afterwards, the formwork that is cast with molten metal is carried out taking out during to the dead head surface skining with the stove cooling.
Afterwards, remove formwork and remove the sand grains of cast(ing) surface.
Afterwards, cut dead head, obtain lightweight gas turbine with thin brilliant block cast turbine.
Claims (2)
1. lightweight gas turbine is characterized in that may further comprise the steps successively with the nearly clean shape casting method of thin brilliant block cast turbine:
Make wax-pattern earlier
Utilize mould under the pressure of 43 ~ 48 temperature of spending, 0.03 ~ 0.05Mpa, to suppress wax impeller processed;
Carry out the wax-pattern assembly welding again
Dead head and wax impeller processed are welded together, obtain module;
Afterwards, make formwork
Be coated with the extension refractory material on the module surface, form formwork on the surface;
Afterwards, dewax
Be that the steam of 95 ~ 105 degree are heated to formwork with temperature, make the wax material in the formwork melt fully, deviate from, obtain formwork;
Afterwards, carry out roasting
Formwork is put into the roaster that temperature is 940 ~ 960 degree, kept 1.8 ~ 2.2 hours;
Afterwards, cast
Arrange in vacuum furnace in 80 ~ 120 rev/mins the whirling vibration platform, it is on the adjustable whirling vibration platform of 95 ~ 105 rev/mins rotating speed that baked formwork is fixed on rotating speed, is that 1570 ~ 1590 molten metal injects in the formwork with temperature; Afterwards, make that the whirling vibration platform is forward and reverse alternately to be rotated for 3 ~ 5 seconds;
Afterwards, the formwork that is cast with molten metal is carried out taking out during to the dead head surface skining with the stove cooling;
Afterwards, remove formwork and remove the sand grains of cast(ing) surface;
Afterwards, cut dead head, obtain lightweight gas turbine block cast turbine.
2. lightweight gas turbine according to claim 1 is with the nearly clean shape casting method of thin brilliant block cast turbine, it is characterized in that described refractory material is to be mixed together form slurry with 325 purpose zirconium English powder and Ludox, and after module put into described slurry and make it be coated with full slurry and take out, spill zircon sand again and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013101619885A CN103273010A (en) | 2013-05-06 | 2013-05-06 | Near net shape casting method of fine grain block casting turbine for lightweight gas turbine |
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| CN2013101619885A CN103273010A (en) | 2013-05-06 | 2013-05-06 | Near net shape casting method of fine grain block casting turbine for lightweight gas turbine |
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| CN103273010A true CN103273010A (en) | 2013-09-04 |
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| CN2013101619885A Pending CN103273010A (en) | 2013-05-06 | 2013-05-06 | Near net shape casting method of fine grain block casting turbine for lightweight gas turbine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658536A (en) * | 2014-01-06 | 2014-03-26 | 山东建筑大学 | Fired mold low-pressure casting process of integral type compressor impeller |
| CN104148583A (en) * | 2014-08-20 | 2014-11-19 | 无锡柯马机械有限公司 | Investment casting method |
| CN104399884A (en) * | 2014-10-22 | 2015-03-11 | 江苏美特林科特殊合金有限公司 | Casting process of turbine of turbocharger for gasoline engine |
| CN105710303A (en) * | 2016-04-01 | 2016-06-29 | 北京昌航精铸技术有限公司 | Vacuum vibration precise casting device and method of high-temperature alloy |
| CN106077561A (en) * | 2016-08-22 | 2016-11-09 | 浙江遂金特种铸造有限公司 | Low speed synchronous belt pulley casting technique |
| CN108500207A (en) * | 2017-02-27 | 2018-09-07 | 上海中洲特种合金材料股份有限公司 | investment casting method |
| CN108555237A (en) * | 2018-04-18 | 2018-09-21 | 常州环能涡轮动力股份有限公司 | The preparation method of turbine and turbine wax-pattern |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658536A (en) * | 2014-01-06 | 2014-03-26 | 山东建筑大学 | Fired mold low-pressure casting process of integral type compressor impeller |
| CN104148583A (en) * | 2014-08-20 | 2014-11-19 | 无锡柯马机械有限公司 | Investment casting method |
| CN104399884A (en) * | 2014-10-22 | 2015-03-11 | 江苏美特林科特殊合金有限公司 | Casting process of turbine of turbocharger for gasoline engine |
| CN105710303A (en) * | 2016-04-01 | 2016-06-29 | 北京昌航精铸技术有限公司 | Vacuum vibration precise casting device and method of high-temperature alloy |
| CN106077561A (en) * | 2016-08-22 | 2016-11-09 | 浙江遂金特种铸造有限公司 | Low speed synchronous belt pulley casting technique |
| CN108500207A (en) * | 2017-02-27 | 2018-09-07 | 上海中洲特种合金材料股份有限公司 | investment casting method |
| CN108555237A (en) * | 2018-04-18 | 2018-09-21 | 常州环能涡轮动力股份有限公司 | The preparation method of turbine and turbine wax-pattern |
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Owner name: WUXI SAMWAY SMART MACHINERY INC. Free format text: FORMER OWNER: WUXI SHANFA CASTING TECHNOLOGY CO., LTD. Effective date: 20140516 |
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Effective date of registration: 20140516 Address after: Huishan District of Jiangsu city in Wuxi Province, 214181 former State Street Yang Jia Wei Cun Applicant after: Wuxi Taiyuan Machinery Co., Ltd. Address before: 214174 Jiangsu province Wuxi city Huishan District Yanqiao Industrial Park Yanqiao Road No. 35 Applicant before: Wuxi Shanfa Casting Technology Co., Ltd. |
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Application publication date: 20130904 |