CN114082891A - Method for reinforcing formwork by adopting carbon fibers - Google Patents
Method for reinforcing formwork by adopting carbon fibers Download PDFInfo
- Publication number
- CN114082891A CN114082891A CN202111402226.0A CN202111402226A CN114082891A CN 114082891 A CN114082891 A CN 114082891A CN 202111402226 A CN202111402226 A CN 202111402226A CN 114082891 A CN114082891 A CN 114082891A
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- Prior art keywords
- slurry
- barrel
- formwork
- shell
- putting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000009415 formwork Methods 0.000 title claims abstract description 44
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 21
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 42
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000004576 sand Substances 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000000080 wetting agent Substances 0.000 claims abstract description 11
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 11
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims abstract description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 6
- -1 phosphate ester Chemical class 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005336 cracking Methods 0.000 abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 9
- 238000005266 casting Methods 0.000 abstract description 6
- 238000012797 qualification Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 14
- 230000007547 defect Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 238000009416 shuttering Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
- B22C23/02—Devices for coating moulds or cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
Abstract
The invention relates to a method for reinforcing a formwork by carbon fiber, which comprises the following steps: putting the rapid stirrer into a slurry preparation barrel, adding silica sol and stirring; adding a wetting agent and a defoaming agent; adding carbon fibers; gradually adding zircon powder step by step and continuously stirring, and pouring the slurry into a slurry barrel; immersing the wax mold assembly which is well assembled into a slurry barrel, taking out and rotating, and blowing off bubbles on the wax mold; uniformly spraying sand on the wax mold assembly which is well stained with the slurry in a sand spraying machine, and then drying the mold shell assembly; putting the mould shell component into a slurry barrel, and then taking out and drying; putting the mould shell component into a dewaxing kettle for dewaxing; and (3) placing the formwork component into a roasting furnace for roasting, and then cooling along with the furnace to finish the formwork manufacturing. The invention can effectively solve the problems of cracking and bulging of the mould shell, and the carbon fiber improves the strength of each layer of mould shell, thereby reducing the number of layers of the shell, reducing the usage amount of shell-making raw materials, quickly cooling the casting and improving the metallurgical qualification rate of the casting.
Description
Technical Field
The invention belongs to the precision casting industry, and particularly relates to a method for reinforcing a formwork by using carbon fibers.
Background
At present, the cracking and bulging of the formwork at the thin wall position mostly exist in the formwork of precision casting, and the cracking and bulging problems of the formwork are mostly solved by increasing ceramic rods and increasing the number of the layers of the formwork.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method for reinforcing a formwork by adopting carbon fibers, which can solve the problems of cracking and bulging of the formwork, improve the strength of each layer of the formwork, reduce the number of layers of the formwork, reduce the use amount of raw materials for manufacturing the shell, quickly cool a casting and improve the metallurgical qualification rate of the casting.
According to the technical scheme provided by the invention, the method for reinforcing the formwork by using the carbon fiber comprises the following steps:
s1, placing the rapid stirrer into a slurry preparation barrel, adding 80-120L of silica sol with the solid content of 20-35% into the slurry preparation barrel, and starting the stirrer to stir;
s2, adding 0.8-1.2L of wetting agent and 0.8-1.2L of defoaming agent into the slurry mixing barrel;
s3, adding 150-260 g of carbon fibers with the diameter of 5-10 microns and the length of 10-20 microns into a slurry mixing barrel;
s4, gradually adding 250-375 kg of zircon powder into the slurry preparation barrel step by step;
s5, after the zircon powder is completely added, continuously stirring for 7-10 hours, finishing pulping, and pouring the pulp into a pulp barrel;
s6, immersing the wax mold assembly which is well assembled into a slurry barrel for 5-15 seconds, then taking out and rotating, and blowing off bubbles on the wax mold by using compressed air;
s7, uniformly spraying sand on the slurry-dipped wax mold assembly in a sand spraying machine, and then drying the mold shell assembly for 10-15 hours in an environment with the temperature of 22-24 ℃ and the humidity of 40-50%;
s8, repeating the step S6 and the step S7 until the target layer number;
s9, putting the die shell assembly into a slurry barrel, taking out, and drying for 48-72 hours in an environment with the temperature of 22-24 ℃ and the humidity of 40-50%;
s10, after the formwork component is dried, putting the formwork component into a dewaxing kettle for dewaxing;
s11, placing the dewaxed formwork component into a roasting furnace for roasting, wherein the roasting temperature is 850-950 ℃, the heat preservation time is 3.5-6 hours, and then cooling along with the furnace;
and S12, finishing cooling and finishing the formwork manufacturing.
Preferably, the wetting agent in the step S2 is composed of nonionic composite phosphate, the mass percentage concentration of the nonionic composite phosphate is 16% -20%, and the balance is water.
Preferably, in step S2, the effective component of the defoaming agent is polysiloxane, the concentration of the polysiloxane is 5-10% by mass, and the balance is water.
The invention adopts high-strength carbon fiber to enhance the strength of the formwork, can effectively solve the problems of cracking and bulging of the formwork, and simultaneously, the carbon fiber improves the strength of each layer of the formwork, thereby reducing the number of layers of the shell, reducing the usage amount of shell-making raw materials, quickly cooling the casting and improving the metallurgical qualification rate of the casting.
Detailed Description
The present invention is further illustrated by the following examples.
The wetting agent used in the examples below was supplied by ILCO-CHEMIKALIEN GMBH CORPORATION, model number 04.000204.
The antifoam used in the examples below was supplied by HUNTSMAN CORPORATION, henzmann, germany, under the model number 04.000016.
Example 1
A method for reinforcing an equiaxed power blade mould shell of a gas turbine by adopting carbon fibers comprises the following steps:
s1, placing the rapid stirrer into a slurry preparation barrel, adding 100L of silica sol with the solid content of 30% into the slurry preparation barrel, and starting the stirrer to stir;
s2, adding 1L of wetting agent and 1L of defoaming agent into the slurry preparation barrel, wherein the mass percent concentration of the nonionic composite phosphate in the wetting agent is controlled to be 18%, and the mass percent concentration of the polysiloxane in the defoaming agent is controlled to be 8%;
s3, adding 200 g of carbon fibers with the diameter of 8 microns and the length of 15 microns into a slurry preparation barrel;
s4, gradually adding 300 kg of zircon powder into the slurry preparation barrel step by step;
s5, after the zircon powder is completely added, continuously stirring for 9 hours, finishing pulping, and pouring the pulp into a pulp barrel;
s6, immersing the wax mold assembly which is well assembled into a slurry barrel for 10 seconds, taking out and rotating for two circles, and blowing off bubbles on the wax mold by using compressed air;
s7, uniformly spraying sand on the slurry-dipped wax mold assembly in a sand spraying machine, and then placing the mold shell assembly in an environment with the temperature of 23 ℃ and the humidity of 45% for drying for 13 hours;
s8, repeating the steps S6 and S7 for 9 times until the target layer number is 10;
s9, putting the die shell assembly into a slurry barrel, and taking out to dry for 60 hours in an environment with the temperature of 23 ℃ and the humidity of 45%;
s10, after the formwork component is dried, putting the formwork component into a dewaxing kettle for dewaxing;
s11, placing the dewaxed formwork component into a roasting furnace for roasting, wherein the roasting temperature is 900 ℃, the heat preservation time is 5 hours, and then cooling along with the furnace;
and S12, finishing cooling and finishing the formwork manufacturing.
The strength of the isometric crystal power blade mould shell of the gas turbine obtained in the embodiment 1 is 9.5MPa, the yield of the isometric crystal power blade mould shell of the gas turbine can reach 95%, and the rejection rate is reduced to 5% due to the defects of cracking, bulging and the like.
The strength of the equiaxial crystal power blade shuttering of the gas turbine obtained by the conventional method is 7.5Pa, the yield of the equiaxial crystal power blade shuttering of the gas turbine is only 80%, and the rejection rate can reach 20% due to the defects of cracking, bulging and the like.
Example 2
A method for reinforcing an isometric crystal static blade mould shell of an aeroengine by adopting carbon fibers comprises the following steps:
s1, placing the rapid stirrer into a slurry mixing barrel, adding 120L of silica sol with the solid content of 35% into the slurry mixing barrel, and starting the stirrer to stir;
s2, adding 1.2L of wetting agent and 1.2L of defoaming agent into a slurry preparation barrel, wherein the mass percent concentration of the nonionic composite phosphate in the wetting agent is controlled to be 20%, and the mass percent concentration of the polysiloxane in the defoaming agent is controlled to be 10%;
s3, adding 260 g of carbon fiber with the diameter of 10 microns and the length of 20 microns into a slurry preparation barrel;
s4, gradually adding 375 kg of zircon powder into the slurry preparation barrel step by step;
s5, after the zircon powder is completely added, continuously stirring for 10 hours, finishing pulping, and pouring the pulp into a pulp barrel;
s6, immersing the wax mold assembly which is well assembled into a slurry barrel for 15 seconds, taking out and rotating for two circles, and blowing off bubbles on the wax mold by using compressed air;
s7, uniformly spraying sand on the slurry-dipped wax mold assembly in a sand spraying machine, and then placing the mold shell assembly in an environment with the temperature of 22 ℃ and the humidity of 40% for drying for 15 hours;
s8, repeating the steps S6 and S7 for 9 times until the target layer number is 10;
s9, putting the die shell assembly into a slurry barrel, and taking out to dry for 72 hours in an environment with the temperature of 22 ℃ and the humidity of 40%;
s10, after the formwork component is dried, putting the formwork component into a dewaxing kettle for dewaxing;
s11, placing the dewaxed mould shell assembly into a roasting furnace for roasting, wherein the roasting temperature is 950 ℃, the heat preservation time is 6 hours, and then cooling along with the furnace;
and S12, finishing cooling and finishing the formwork manufacturing.
The strength of the isometric crystal static blade mould shell of the aircraft engine obtained in the embodiment 2 is 9.5MPa, the yield of the isometric crystal static blade mould shell of the aircraft engine can reach 92%, and the rejection rate is reduced to 8% due to the defects of cracking, bulging and the like.
The strength of the isometric crystal static blade shuttering of the aircraft engine obtained by the conventional method is 7MPa, the yield of the isometric crystal static blade shuttering of the aircraft engine is only 70 percent, and the rejection rate can reach 30 percent due to the defects of cracking, bulging and the like.
Example 3
A method for reinforcing an isometric crystal structural member formwork of a gas turbine by using carbon fibers comprises the following steps:
s1, placing the rapid stirrer into a slurry preparation barrel, adding 80L of silica sol with the solid content of 20% into the slurry preparation barrel, and starting the stirrer to stir;
s2, adding 0.8L of wetting agent and 0.8L of defoaming agent into the slurry preparation barrel;
s3, adding 150 g of carbon fiber with the diameter of 5 microns and the length of 10 microns into a slurry preparation barrel;
s4, gradually adding 250 kg of zircon powder into the slurry preparation barrel step by step;
s5, after the zircon powder is completely added, continuously stirring for 7 hours to finish pulping, and pouring the pulp into a pulp barrel;
s6, immersing the wax mold assembly which is well assembled into a slurry barrel for 5 seconds, then taking out and rotating, and blowing off bubbles on the wax mold by using compressed air;
s7, uniformly spraying sand on the slurry-dipped wax mold assembly in a sand spraying machine, and then placing the mold shell assembly in an environment with the temperature of 24 ℃ and the humidity of 50% for drying for 10 hours;
s8, repeating the steps S6 and S7 until the target layer number is reached;
s9, putting the die shell assembly into a slurry barrel, and taking out to dry for 48 hours in an environment with the temperature of 24 ℃ and the humidity of 50%;
s10, after the formwork component is dried, putting the formwork component into a dewaxing kettle for dewaxing;
s11, placing the dewaxed formwork component into a roasting furnace for roasting, wherein the roasting temperature is 850 ℃, the heat preservation time is 3.5 hours, and then cooling along with the furnace;
and S12, finishing cooling and finishing the formwork manufacturing.
The strength of the isometric crystal structural member formwork of the gas turbine obtained in example 3 is 9.5MPa, the yield of the isometric crystal structural member formwork of the gas turbine can reach 99%, and the rejection rate is reduced to 1% due to the defects of cracking, bulging and the like.
The strength of the isometric crystal structural part mould shell of the gas turbine obtained by the conventional method is 7.5MPa, the yield of the isometric crystal structural part mould shell of the gas turbine is only 82%, and the rejection rate can reach 18% due to the defects of cracking, bulging and the like.
The principle of the invention is as follows: if the carbon fiber with the diameter less than 5 micrometers or the carbon fiber with the length less than 10 micrometers is adopted, the strength of the formwork cannot be sufficiently improved; conversely, if the diameter is greater than 10 microns or the length is greater than 20 microns, the slurry fluidity is reduced, and the formwork surface is piled up, resulting in uneven formwork wall thickness.
Claims (3)
1. A method for reinforcing a formwork by using carbon fibers is characterized by comprising the following steps:
s1, placing the rapid stirrer into a slurry preparation barrel, adding 80-120L of silica sol with the solid content of 20-35% into the slurry preparation barrel, and starting the stirrer to stir;
s2, adding 0.8-1.2L of wetting agent and 0.8-1.2L of defoaming agent into the slurry mixing barrel;
s3, adding 150-260 g of carbon fibers with the diameter of 5-10 microns and the length of 10-20 microns into a slurry mixing barrel;
s4, gradually adding 250-375 kg of zircon powder into the slurry preparation barrel step by step;
s5, after the zircon powder is completely added, continuously stirring for 7-10 hours, finishing pulping, and pouring the pulp into a pulp barrel;
s6, immersing the wax mold assembly which is well assembled into a slurry barrel for 5-15 seconds, then taking out and rotating, and blowing off bubbles on the wax mold by using compressed air;
s7, uniformly spraying sand on the slurry-dipped wax mold assembly in a sand spraying machine, and then drying the mold shell assembly for 10-15 hours in an environment with the temperature of 22-24 ℃ and the humidity of 40-50%;
s8, repeating the step S6 and the step S7 until the target layer number;
s9, putting the mould shell into a slurry barrel, taking out and drying for 48-72 hours in an environment with the temperature of 22-24 ℃ and the humidity of 40-50%;
s10, after the formwork component is dried, putting the formwork component into a dewaxing kettle for dewaxing;
s11, placing the dewaxed formwork component into a roasting furnace for roasting, wherein the roasting temperature is 850-950 ℃, the heat preservation time is 3.5-6 hours, and then cooling along with the furnace;
and S12, finishing cooling and finishing the formwork manufacturing.
2. The method of claim 1, further comprising the step of: in the step S2, the wetting agent is composed of nonionic composite phosphate ester, the mass percentage concentration of the nonionic composite phosphate ester is 16% -20%, and the balance is water.
3. The method of claim 1, further comprising the step of: in the step S2, the effective component of the defoaming agent is polysiloxane, the mass percentage concentration of the polysiloxane is 5% -10%, and the balance is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111402226.0A CN114082891A (en) | 2021-11-24 | 2021-11-24 | Method for reinforcing formwork by adopting carbon fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111402226.0A CN114082891A (en) | 2021-11-24 | 2021-11-24 | Method for reinforcing formwork by adopting carbon fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114082891A true CN114082891A (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111402226.0A Pending CN114082891A (en) | 2021-11-24 | 2021-11-24 | Method for reinforcing formwork by adopting carbon fibers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114082891A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020195225A1 (en) * | 2000-03-17 | 2002-12-26 | Shaw Richard Dudley | Investment casting |
| CN103252448A (en) * | 2013-04-19 | 2013-08-21 | 江苏大学 | Preparation method of thin-wall high-strength mold shell for single crystal blade manufacturing |
| CN103496991A (en) * | 2013-09-16 | 2014-01-08 | 江门市凯斯特尔实业有限公司 | Refractory material as well as preparation method and applications thereof |
| JP2015131310A (en) * | 2014-01-10 | 2015-07-23 | 三菱重工業株式会社 | Casting mold forming slurry, method of manufacturing casting mold, casting mold, and method of manufacturing casting mold formation slurry |
| CN105834361A (en) * | 2016-04-01 | 2016-08-10 | 江苏大学 | Method for preparing modified ceramic mold shell through special-shaped cross section short carbon fibers |
| CN111001757A (en) * | 2019-12-27 | 2020-04-14 | 西安西工大超晶科技发展有限责任公司 | Rapid production method of porous stainless steel pipe seat casting with high surface quality |
-
2021
- 2021-11-24 CN CN202111402226.0A patent/CN114082891A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020195225A1 (en) * | 2000-03-17 | 2002-12-26 | Shaw Richard Dudley | Investment casting |
| CN103252448A (en) * | 2013-04-19 | 2013-08-21 | 江苏大学 | Preparation method of thin-wall high-strength mold shell for single crystal blade manufacturing |
| CN103496991A (en) * | 2013-09-16 | 2014-01-08 | 江门市凯斯特尔实业有限公司 | Refractory material as well as preparation method and applications thereof |
| JP2015131310A (en) * | 2014-01-10 | 2015-07-23 | 三菱重工業株式会社 | Casting mold forming slurry, method of manufacturing casting mold, casting mold, and method of manufacturing casting mold formation slurry |
| CN105834361A (en) * | 2016-04-01 | 2016-08-10 | 江苏大学 | Method for preparing modified ceramic mold shell through special-shaped cross section short carbon fibers |
| CN111001757A (en) * | 2019-12-27 | 2020-04-14 | 西安西工大超晶科技发展有限责任公司 | Rapid production method of porous stainless steel pipe seat casting with high surface quality |
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Application publication date: 20220225 |