CN102432338A - Ceramic core surface room temperature hardening agent and ceramic core surface hardening process - Google Patents
Ceramic core surface room temperature hardening agent and ceramic core surface hardening process Download PDFInfo
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- CN102432338A CN102432338A CN2010102952400A CN201010295240A CN102432338A CN 102432338 A CN102432338 A CN 102432338A CN 2010102952400 A CN2010102952400 A CN 2010102952400A CN 201010295240 A CN201010295240 A CN 201010295240A CN 102432338 A CN102432338 A CN 102432338A
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- ceramic core
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Abstract
The invention aims to provide a ceramic core surface room temperature hardening agent and a ceramic core surface hardening process. The hardening agent is characterized by consisting of epoxy resin, polyamide, acetone and alcohol (the concentration is 10-15 percent) in the weight ratio of (4-6):(4-6):(4-7):(1-2); and mixing the raw materials till the viscosity is 15-17 s. The hardening agent has a wide application range and a good hardening effect; and meanwhile, after a core is hardened with the core surface hardening process, the strength is increased by 3-5 times, the toughness is increased by 2-4 times, cracks on the core during wax pressing can be remarkably reduced, and the yield is over 90 percent. The invention particularly provides a ceramic core surface room temperature hardening agent.
Description
Technical field
The present invention relates to medium-temperature reinforced agent material of ceramic core room surface and ceramic core surface intensified technique.
Background technology
Ceramic core is the technical requirements that can guarantee the complicated hollow blade of precision casting and structural part inner-cavity structure shape and size, and it is used to receive day by day widely and payes attention to.Two principal elements that influence the core performance quality are: hot strength and room temperature strength.The core room temperature strength mainly leans on reinforcer material and reinforcing process to improve; Reinforcer through liquid state is penetrated in the inner small spaces of core and goes; Make the combination between powder more firm after the curing; The quality of strengthening effect and the kind of reinforcer and reinforcing process have substantial connection, and they are important link in the ceramic core manufacturing processed.The main at present phenolic aldehyde spirit varnish reinforcer that adopts improves the ceramic core room temperature strength; But because engine manufacturing technology improves constantly; The manufacturing technology of core and performance index require higher, and existing phenolic aldehyde spirit varnish reinforcer can't satisfy the request for utilization of core.
Summary of the invention
The object of the present invention is to provide medium-temperature reinforced dose of a kind of ceramic core room surface and whose surfaces reinforcing process; This reinforcer is applied widely, and strengthening effect is good, adopts the core after whose surfaces reinforcing process according to the invention is strengthened simultaneously; Its intensity improves 3～5 times; Toughness improves 2～4 times, and can significantly reduce the crackle of core when pressing wax, and qualification rate reaches more than 90%.
The present invention specifically provides medium-temperature reinforced dose of a kind of ceramic core room surface; It is characterized in that: the composition of this reinforcer and weight ratio thereof do; Epoxy resin: polymeric amide: acetone: alcohol (concentration is 10～15%)=4～6: 4～6: 4～7: 1～2; With stirring after the above-mentioned raw materials mixing; (viscosity is pressed HB5351.1-2004 and carried out: the outflow aperture of flow cup is
capacity 100ML, timing register: stopwatch) to make its viscosity reach 15～17s.
Whose surfaces room temperature reinforcer according to the invention is characterized in that: its composition optimum weight ratio of said reinforcer is epoxy resin: polymeric amide: acetone: alcohol=5: 5: 6: 1.5.
The present invention also provides a kind of whose surfaces reinforcing process; It is characterized in that: ceramic core according to the invention is immersed in medium-temperature reinforced dose of the ceramic core room surface provided by the invention (reinforcer can be put into plastic channel); Soaking temperature: 20～30 ℃, soak time: 30～50min; After taking out more than the air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1～1.5h, be warming up to 50 ± 10 ℃; Insulation 0.5～1.0h; In 0.5～1.0h, be warming up to 100 ± 10 ℃ then, insulation 0.5～1h is warming up to 140 ± 10 ℃ at last in 0.5～1.0h; Insulation 1.5～2.0h comes out of the stove below the furnace cooling to 50 ℃.Strengthening effect is best when being faint yellow through the whose surfaces after the above-mentioned reinforcing process reinforcement.
Though reinforcer performance according to the invention is good, if reinforcing process is improper, strengthening effect is also poor.In order to guarantee that reinforcer can be smoothly and be penetrated into fully in the whole cross section of core and go, must control strengthen temperature and enhanced time, reinforcer will have suitable reinforcement temperature, just can make it have good penetration property; Enhanced time needs suitably control simultaneously, thereby time length directly has influence on the intensity that the thickness of strengthening layer influences core.
Reinforcer according to the invention and reinforcing process; Be not only applicable to cores such as complex-shaped, thin-walled, large piece; Be more suitable for being used to produce orientation, the silica-based or aluminium base ceramic core of single crystal blade, the whose surfaces good penetrability that it is made, the surface is difficult for producing be full of cracks during baking.Practice shows, the core after strengthening with this method, and its intensity improves 3～5 times, and toughness improves 2～4 times, and can significantly reduce the crackle of core when pressing wax, and qualification rate reaches more than 90%.Simultaneously, reinforcer material according to the invention and intensification technique method can promote the use of the surface strengthening of other ceramic.
Embodiment
The concentration of alcohol that present embodiment uses is 10%.
Embodiment 1
The raw material weight ratio of whose surfaces room temperature reinforcer does; Epoxy resin: polymeric amide: acetone: alcohol=4: 6: 5: 1, above-mentioned raw materials is put into a plastic channel, stir at normal temperatures; Making its viscosity is 15s, and it is for use to process whose surfaces room temperature reinforcer.
Ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 25 ℃, soak time: 40min; After taking out air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1.5h, be warming up to 50 ℃; Insulation 0.5h is warming up to 100 ℃ then in 1.0h, insulation 1h; In 0.5h, be warming up to 150 ℃ at last; Insulation 1.5h comes out of the stove below the furnace cooling to 50 ℃, obtains the surface and is flaxen ceramic core.Its compressive strength at room temperature of ceramic core after strengthening reaches 50Mpa.
Embodiment 2
The raw material weight ratio of whose surfaces room temperature reinforcer does; Epoxy resin: polymeric amide: acetone: alcohol=5: 5: 6: 1.5, above-mentioned raw materials is put into a plastic channel, stir at normal temperatures; Making its viscosity is 16s, and it is for use to process whose surfaces room temperature reinforcer.
Ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 25 ℃, soak time: 40min; After taking out air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1.5h, be warming up to 50 ℃; Insulation 0.5h is warming up to 100 ℃ then in 1.0h, insulation 1h; In 0.5h, be warming up to 150 ℃ at last; Insulation 1.5h comes out of the stove below the furnace cooling to 50 ℃, obtains the surface and is flaxen ceramic core.Its compressive strength at room temperature of ceramic core after strengthening reaches 46Mpa.
Embodiment 3
The raw material weight ratio of whose surfaces room temperature reinforcer does; Epoxy resin: polymeric amide: acetone: alcohol=6: 4: 7: 2, above-mentioned raw materials is put into a plastic channel, stir at normal temperatures; Making its viscosity is 17s, and it is for use to process whose surfaces room temperature reinforcer.
Ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 30 ℃, soak time: 30min; After taking out air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1.0h, be warming up to 45 ℃; Insulation 1.0h is warming up to 110 ℃ then in 0.8h, insulation 0.5h; In 0.5h, be warming up to 140 ℃ at last; Insulation 2.0h comes out of the stove below the furnace cooling to 50 ℃, obtains the surface and is flaxen ceramic core.Its compressive strength at room temperature of ceramic core after strengthening reaches 60Mpa.
Comparative example 1
The raw material weight ratio of whose surfaces room temperature reinforcer does; Epoxy resin: polymeric amide: acetone: alcohol=5: 3: 3: 2, above-mentioned raw materials is put into a plastic channel, stir at normal temperatures; Making its viscosity is 15s, and it is for use to process whose surfaces room temperature reinforcer.
Ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 25 ℃, soak time: 40min; After taking out air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1.5h, be warming up to 50 ℃; Insulation 0.5h is warming up to 100 ℃ then in 1.0h, insulation 1h; In 0.5h, be warming up to 150 ℃ at last; Insulation 1.5h comes out of the stove below the furnace cooling to 50 ℃, is 20Mpa through detecting its compressive strength at room temperature.
Comparative example 2
The raw material weight ratio of whose surfaces room temperature reinforcer does; Epoxy resin: polymeric amide: acetone: alcohol=7: 6: 3: 2, above-mentioned raw materials is put into a plastic channel, stir at normal temperatures; Making its viscosity is 16s, and it is for use to process whose surfaces room temperature reinforcer.
Ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 25 ℃, soak time: 40min; After taking out air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1.5h, be warming up to 50 ℃; Insulation 0.5h is warming up to 100 ℃ then in 1.0h, insulation 1h; In 0.5h, be warming up to 150 ℃ at last; Insulation 1.5h comes out of the stove below the furnace cooling to 50 ℃, is 25Mpa through detecting its compressive strength at room temperature.
Comparative example 3
The raw material weight ratio of whose surfaces room temperature reinforcer does; Epoxy resin: polymeric amide: acetone: alcohol=5: 5: 6: 1.5, above-mentioned raw materials is put into a plastic channel, stir at normal temperatures; Making its viscosity is 16s, and it is for use to process whose surfaces room temperature reinforcer.
Ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 25 ℃, soak time: 40min; After taking out air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1.5h, be warming up to 50 ℃; Insulation 0.5h is warming up to 100 ℃ then in 1.0h, insulation 1h; In 0.5h, be warming up to 160 ℃ at last, insulation 1.5h comes out of the stove below the furnace cooling to 50 ℃; Obtaining the surface and be brown ceramic core, is 22Mpa through detecting its compressive strength at room temperature.
Claims (3)
1. a ceramic core room surface is medium-temperature reinforced dose; It is characterized in that: the composition of this reinforcer and weight ratio thereof do; Epoxy resin: polymeric amide: acetone: alcohol=4～6: 4～6: 4～7: 1～2, with stirring after the above-mentioned raw materials mixing, make its viscosity reach 15～17s.
2. according to medium-temperature reinforced dose of the said ceramic core room surface of claim 1, it is characterized in that: the composition of said reinforcer and weight ratio thereof are epoxy resin: polymeric amide: acetone: alcohol=5: 5: 6: 1.5.
3. ceramic core surface intensified technique is characterized in that: ceramic core is immersed in medium-temperature reinforced dose of the ceramic core room surface soaking temperature: 20～30 ℃, and soak time: 30～50min; After taking out more than the air dry 24h, be positioned in the electrically heated drying cabinet and toast, baking process is: in 1～1.5h, be warming up to 50 ± 10 ℃; Insulation 0.5～1.0h; In 0.5～1.0h, be warming up to 100 ± 10 ℃ then, insulation 0.5～1h is warming up to 140 ± 10 ℃ at last in 0.5～1.0h; Insulation 1.5～2.0h comes out of the stove below the furnace cooling to 50 ℃.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143671A (en) * | 2013-03-29 | 2013-06-12 | 哈尔滨工业大学 | Method for strengthening silicon oxide ceramic core by using epoxy resin |
| CN104384452A (en) * | 2014-10-24 | 2015-03-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation technique for thin-walled silica-based ceramic mold core |
| CN106862492A (en) * | 2017-01-16 | 2017-06-20 | 沈阳工业大学 | The intensifying method of soluble core |
| CN107056286A (en) * | 2017-04-25 | 2017-08-18 | 南昌大学 | It is a kind of to improve mechanical property and the ceramic complexes preparation method of antibacterial ability |
| CN110465627A (en) * | 2019-09-16 | 2019-11-19 | 郑州航空工业管理学院 | A kind of surface layer densification internal defect ceramic core manufacturing method for hollow turbine vane hot investment casting |
| CN115947606A (en) * | 2022-12-16 | 2023-04-11 | 中航装甲科技有限公司 | Water-soluble enhancer for silicon-based ceramic core and enhancing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745604A (en) * | 2008-12-10 | 2010-06-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Technical method for removing burnt-on sand in groove of ceramic core |
-
2010
- 2010-09-29 CN CN 201010295240 patent/CN102432338B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745604A (en) * | 2008-12-10 | 2010-06-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Technical method for removing burnt-on sand in groove of ceramic core |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143671A (en) * | 2013-03-29 | 2013-06-12 | 哈尔滨工业大学 | Method for strengthening silicon oxide ceramic core by using epoxy resin |
| CN104384452A (en) * | 2014-10-24 | 2015-03-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation technique for thin-walled silica-based ceramic mold core |
| CN106862492A (en) * | 2017-01-16 | 2017-06-20 | 沈阳工业大学 | The intensifying method of soluble core |
| CN107056286A (en) * | 2017-04-25 | 2017-08-18 | 南昌大学 | It is a kind of to improve mechanical property and the ceramic complexes preparation method of antibacterial ability |
| CN107056286B (en) * | 2017-04-25 | 2020-05-19 | 南昌大学 | Method for preparing ceramic composite capable of improving mechanical property and antibacterial ability |
| CN110465627A (en) * | 2019-09-16 | 2019-11-19 | 郑州航空工业管理学院 | A kind of surface layer densification internal defect ceramic core manufacturing method for hollow turbine vane hot investment casting |
| CN115947606A (en) * | 2022-12-16 | 2023-04-11 | 中航装甲科技有限公司 | Water-soluble enhancer for silicon-based ceramic core and enhancing method |
| CN115947606B (en) * | 2022-12-16 | 2024-03-12 | 中航装甲科技有限公司 | Water-soluble strengthening agent and strengthening method for silicon-based ceramic core |
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| CN102432338B (en) | 2013-06-26 |
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Effective date of registration: 20160829 Address after: 110043 Liaoning Province, Shenyang City District East Street No. six Patentee after: Shenyang AVIC Dynamic Precision Casting Technology Co., Ltd. Address before: 110043 Liaoning Province, Shenyang City District East Street No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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Address after: 110000 No. 6 Dongta Street, Dadong District, Shenyang City, Liaoning Province Patentee after: Shenyang Hangfa Precision Casting Co., Ltd. Address before: 110043 Liaoning Province, Shenyang City District East Street No. six Patentee before: Shenyang AVIC Dynamic Precision Casting Technology Co., Ltd. |
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Effective date of registration: 20190826 Address after: 110043 Liaoning Province, Shenyang City District East Street No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110000 No. 6 Dongta Street, Dadong District, Shenyang City, Liaoning Province Patentee before: Shenyang Hangfa Precision Casting Co., Ltd. |
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