CN102672800B - A kind of method reduced friction in superconduction block material single shaft compression molding process - Google Patents
A kind of method reduced friction in superconduction block material single shaft compression molding process Download PDFInfo
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- CN102672800B CN102672800B CN201110061659.4A CN201110061659A CN102672800B CN 102672800 B CN102672800 B CN 102672800B CN 201110061659 A CN201110061659 A CN 201110061659A CN 102672800 B CN102672800 B CN 102672800B
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Abstract
The present invention relates to a kind of method reduced friction in superconduction block material single shaft compression molding process, the method comprises the cylindrical die using diameter 35 ~ 70mm, high 80 ~ 100mm, before charging, first on die inside wall, apply one deck releasing agent, then 80 ~ 300g superconduction powder is loaded in this mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 20 ~ 45T.The method by first forming one deck lubricating film in the mould of single shaft mold pressing, then carries out single shaft mold pressing, to reduce the frictional force in mold process between superconduction predecessor block and mould, suppresses to crack in the superconducting block of final molding.
Description
Technical field
The present invention relates to a kind of method reduced friction when utilizing the shaping high-temperature superconducting block of single shaft molding device.
Background material
Since 1986 find High-t_c Superconductivity, worldwide start high-temperature superconductor research boom.Up to the present, extensive careful research has all been carried out to the Material Field of high-temperature superconductor and forceful electric power light current application.For high-temperature superconducting block, there are two basic characteristics and super-conductive magnetic suspension power and Trapped field.The magnetic of bulk floats characteristic and may be used for making superconduction non-contacted conveyance system, magnetic bearing, flywheel energy storage system etc.Capture the characteristic of magnetic flux based on height, can high-temperature superconducting magnet be made, superconducting motor etc.Therefore, it is crucial for preparing high performance superconductor.Utilize melting texture growing technology can prepare the high performance superconduction block material of large scale, but want to obtain practical superconductor, the critical current density of high-temperature superconducting block and the mechanical strength of single domain size and bulk must be improved further.For this reason, employing prepares in conjunction with the Melt-Textured Growth Process of top seed crystal technology the focus that the high performance single domain superconduction block material of large scale becomes superconduction block material research in recent years.
But for the superconducting sample of large scale (diameter is greater than 30mm), predecessor is shaping is an important step in superconduction block material preparation process.The molding mode of usual employing is single shaft mold pressing and/or isostatic cool pressing.When the powder single shaft compression molding adopting granularity thinner, in the predecessor block suppressed, easily form micro-crack, this defect is still retained in block after sintering, has had a strong impact on the machinery of superconducting block, electricity and magnetic performance.Therefore, the moulding process studying superconduction predecessor powder is most important.At present, diameter is greater than to the superconduction block material of 30mm, after single shaft mold pressing, predecessor block produces more crackle, and density is less, adopts isostatic cool pressing mode shaping so general.Even if but adopt isostatic cool pressing technology, also first with single shaft molding device, preformed is carried out to superconduction powder, therefore, how to avoid after single shaft mold pressing in predecessor block crackle just most important.
Summary of the invention
For the problems referred to above of prior art, the present invention proposes a kind of before superconducting precursor powder body carries out single shaft compression molding, to the method that the inwall of mould lubricates, to reduce the frictional force in mold process between superconduction predecessor block and mould, suppress to crack in the superconducting block of final molding.
For achieving the above object, the present invention includes following technical scheme:
A kind of method reduced friction in superconduction block material single shaft compression molding process, the method comprises the cylindrical die using diameter 35 ~ 70mm, high 80 ~ 100mm, before charging, first on die inside wall, apply one deck releasing agent, this releasing agent is selected from triethanolamine, propane diols or organic silicone oil; Then 80 ~ 300g superconduction powder is loaded in this mould; Adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 20 ~ 45T.
Method as above, wherein, the consumption of this releasing agent is preferably 0.5 ~ 2.5mg/cm
2.
Method as above, the method comprises the cylindrical die using diameter 35mm, high 80mm, before charging, first use about 100mg triethanolamine coating die madial wall to form one deck lubricating film, then 80g superconduction powder is loaded in this mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 20 ~ 25T.
Method as above, the method comprises the cylindrical die using diameter 57mm, high 80mm, before charging, first use about 160mg triethanolamine coating die madial wall to form one deck lubricating film, then 200g superconduction powder is loaded in this mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 30 ~ 35T.
Method as above, the method comprises the cylindrical die using diameter 70mm, high 100mm, before charging, first use about 200mg triethanolamine coating die madial wall to form one deck lubricating film, then 300g superconduction powder is loaded in this mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 40 ~ 45T.
Method as above, the method comprises use diameter 57mm, the cylindrical die of high 80mm, before charging, first use about 300mg triethanolamine coating die madial wall to form one deck lubricating film, then 200g superconduction powder is loaded in this mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, pressure is 30 ~ 35T.
Method as above, the method comprises use diameter 70mm, the cylindrical die of high 100mm, before charging, first use about 450mg triethanolamine coating die madial wall to form one deck lubricating film, then 300g superconduction powder is loaded in this mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, pressure is 40 ~ 45T.
Beneficial effect of the present invention is, the method by first forming one deck lubricating film in the mould of single shaft mold pressing, then superconduction powder is loaded in mould, carry out single shaft mold pressing again, to reduce the frictional force in mold process between superconduction predecessor block and mould, suppress to crack in the superconducting block of final molding.In the present invention, apply one deck releasing agent at die inside wall, its objective is and between mould and module, form one deck inertia and the coating with lubrication, module is deviate from easily from mould.For this reason, the present invention, in the selection of releasing agent, considers the motion conditions of friction pair, material surface roughness, working environment and condition of work, and the many factors such as the performance of releasing agent.On the one hand releasing agent to be avoided to have an impact to superconduction powder, can be volatilizable below 600 DEG C and do not react with superconduction powder; On the other hand, require that releasing agent is easy to form uniform thin layer (good film-forming property) at mould inner surface, and can oxidation on metal surface be prevented.Result of the test shows, mould is lubricated to be conducive to superconducting block shaping, the especially more remarkable effect when suppressing large-sized superconducting block.
Detailed description of the invention
Embodiment 1
By RE211 (RE, Ba and Cu oxide RE
2baCuO
5) powder joins RE123 (RE, Ba and Cu oxide REBa in the ratio of 40mol%
2cu
3o
7) in powder, and be mixed into 0.2wt%Pt, mix through high speed runout ball milling, weigh the above-mentioned superconduction powder of 80g; Use diameter 35mm, the cylindrical die of high 80mm, before charging, first dip triethanolamine wiping mould madial wall to form one deck lubricating film with absorbent cotton, in each mould, the consumption of triethanolamine is about 100mg, then superconduction powder is loaded in corresponding mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, adopt 20T, 25T, 30T tri-kinds of pressure to be pressed into three block samples respectively.
Observe the superconducting block after shaping, find under above-mentioned three kinds of briquetting pressures, only have the superconducting block applying 30T pressure, have slight crackle to occur in bottom, other two kinds of pressure all can make superconducting block normally shaping.
Embodiment 2
By RE211 (RE, Ba and Cu oxide RE
2baCuO
5) powder joins RE123 (RE, Ba and Cu oxide REBa in the ratio of 40mol%
2cu
3o
7) in powder, and be mixed into 0.2wt%Pt, mix through high speed runout ball milling, weigh the above-mentioned superconduction powder of 200g; Use diameter 57mm, the cylindrical die of high 80mm, before charging, first dip triethanolamine wiping mould madial wall to form one deck lubricating film with absorbent cotton, in each mould, the consumption of triethanolamine is about 160mg, then superconduction powder is loaded in corresponding mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, adopt 30T, 35T, 40T tri-kinds of pressure to be pressed into three block samples respectively.
Observe the superconducting block after shaping, find under above-mentioned three kinds of briquetting pressures, only have the superconducting block applying 40T pressure, have slight crackle to occur in bottom, other two kinds of pressure all can make superconducting block normally shaping.
Embodiment 3
By RE211 (RE, Ba and Cu oxide RE
2baCuO
5) powder joins RE123 (RE, Ba and Cu oxide REBa in the ratio of 40mol%
2cu
3o
7) in powder, and be mixed into 0.2wt%Pt, mix through high speed runout ball milling, weigh the above-mentioned superconduction powder of 300g; Use diameter 70mm, the cylindrical die of high 100mm, before charging, first dip triethanolamine wiping mould madial wall to form one deck lubricating film with absorbent cotton, in each mould, the consumption of triethanolamine is about 200mg, then superconduction powder is loaded in corresponding mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, adopt 40T, 45T, 50T tri-kinds of pressure to be pressed into three block samples respectively.
Observe the superconducting block after shaping, find under above-mentioned three kinds of briquetting pressures, only have the superconducting block applying 50T pressure, have slight crackle to occur in bottom, other two kinds of pressure all can make superconducting block normally shaping.
Embodiment 4
By RE211 (RE, Ba and Cu oxide RE
2baCuO
5) powder joins RE123 (RE, Ba and Cu oxide REBa in the ratio of 40mol%
2cu
3o
7) in powder, and be mixed into 0.2wt%Pt, mix through high speed runout ball milling, weigh the above-mentioned superconduction powder of 200g; Use diameter 57mm, the cylindrical die of high 80mm, before charging, first dip triethanolamine wiping mould madial wall to form one deck lubricating film with absorbent cotton, in each mould, the consumption of triethanolamine is about 300mg, then superconduction powder is loaded in corresponding mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, adopt 30T, 35T, 40T tri-kinds of pressure to be pressed into three block samples respectively.
Observe the superconducting block after shaping, find under above-mentioned three kinds of briquetting pressures, only have the superconducting block applying 40T pressure, have slight crackle to occur in bottom, other two kinds of pressure all can make superconducting block normally shaping.
Embodiment 5
By RE211 (RE, Ba and Cu oxide RE
2baCuO
5) powder joins RE123 (RE, Ba and Cu oxide REBa in the ratio of 40mol%
2cu
3o
7) in powder, and be mixed into 0.2wt%Pt, mix through high speed runout ball milling, weigh the above-mentioned superconduction powder of 300g; Use diameter 70mm, the cylindrical die of high 100mm, before charging, first dip triethanolamine wiping mould madial wall to form one deck lubricating film with absorbent cotton, in each mould, the consumption of triethanolamine is about 450mg, then superconduction powder is loaded in corresponding mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, adopt 40T, 45T, 50T tri-kinds of pressure to be pressed into three block samples respectively.
Observe the superconducting block after shaping, find under above-mentioned three kinds of briquetting pressures, only have the superconducting block applying 50T pressure, have slight crackle to occur in bottom, other two kinds of pressure all can make superconducting block normally shaping.
Comparative example 1
By RE211 (RE, Ba and Cu oxide RE
2baCuO
5) powder joins RE123 (RE, Ba and Cu oxide REBa in the ratio of 40mol%
2cu
3o
7) in powder, and be mixed into 0.2wt%Pt, mix through high speed runout ball milling; Use diameter 35mm, the cylindrical die of high 80mm, the 80g that weighs with scale above-mentioned superconduction powder loads in above-mentioned mould, adopts single shaft Self-pressurizing agri molding device to be pressed, adopts 10T, 15T, 20T tri-kinds of pressure to be pressed into three block samples respectively.
Observe the superconducting block after shaping, find when briquetting pressure is greater than 15T, superconducting block is easy to occur lamination.
For above-mentioned mould, if before charging, first dip triethanolamine wiping mould madial wall to form one deck lubricating film with absorbent cotton, in each mould, the consumption of triethanolamine is about 100mg, then superconduction powder is loaded in corresponding mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure be respectively 20,25,30T.
Observe the superconducting block after shaping, find under above-mentioned three kinds of briquetting pressures, only have the superconducting block applying 30T pressure, have slight crackle to occur in bottom, other two kinds of pressure all can make superconducting block normally shaping.
From above result, after obviously mould being lubricated, greatly can reduce the frictional force in single shaft mold process between superconducting block and mould inner wall, shaping very favourable to superconducting block.Especially the more remarkable effect when suppressing large-sized superconducting block.
Claims (7)
1. the method reduced friction in superconduction block material single shaft compression molding process, it is characterized in that, the method comprises the cylindrical die using diameter 35 ~ 70mm, high 80 ~ 100mm, before charging, first on die inside wall, apply one deck releasing agent, this releasing agent is triethanolamine; Then 80 ~ 300g superconduction powder is loaded in this mould; Adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 20 ~ 45T.
2. the method for claim 1, is characterized in that, the consumption of described releasing agent is 0.5 ~ 2.5mg/cm
2.
3. the method for claim 1, it is characterized in that, described method comprises the cylindrical die using diameter 35mm, high 80mm, before charging, first use 100mg triethanolamine coating die madial wall to form one deck lubricating film, then 80g superconduction powder is loaded in this mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, pressure is 20 ~ 25T.
4. the method for claim 1, it is characterized in that, described method comprises the cylindrical die using diameter 57mm, high 80mm, before charging, first use 160mg triethanolamine coating die madial wall to form one deck lubricating film, then 200g superconduction powder is loaded in this mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, pressure is 30 ~ 35T.
5. the method for claim 1, it is characterized in that, described method comprises the cylindrical die using diameter 70mm, high 100mm, before charging, first use 200mg triethanolamine coating die madial wall to form one deck lubricating film, then 300g superconduction powder is loaded in this mould, then adopt single shaft Self-pressurizing agri molding device to be pressed, pressure is 40 ~ 45T.
6. the method for claim 1, it is characterized in that, described method comprises use diameter 57mm, the cylindrical die of high 80mm, before charging, first use 300mg triethanolamine coating die madial wall to form one deck lubricating film, then 200g superconduction powder is loaded in this mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 30 ~ 35T.
7. the method for claim 1, it is characterized in that, described method comprises use diameter 70mm, the cylindrical die of high 100mm, before charging, first use 450mg triethanolamine coating die madial wall to form one deck lubricating film, then 300g superconduction powder is loaded in this mould, adopt single shaft Self-pressurizing agri molding device to be pressed again, pressure is 40 ~ 45T.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982562A (en) * | 2018-08-03 | 2018-12-11 | 武汉科技大学 | The preparation method of cobalt internal standard XRF analysis sheet glass based on assisted ejection agent |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956452A (en) * | 1973-08-16 | 1976-05-11 | Shinagawa Firebrick, Co., Ltd. | Dry-type isostatic pressing method involving minimization of breaks or cracks in the molded bodies |
| JPH03164207A (en) * | 1989-11-24 | 1991-07-16 | Suzuki Motor Corp | Mold for ceramic |
| JPH1080910A (en) * | 1996-09-09 | 1998-03-31 | Ishikawajima Harima Heavy Ind Co Ltd | Molding method for thin molding |
| CN1657253A (en) * | 2005-02-04 | 2005-08-24 | 淄博德惠来装饰瓷板有限公司 | Method and device for shaping fiber ceramic plate |
| CN101168844A (en) * | 2007-11-30 | 2008-04-30 | 重庆工学院 | Treatment method for increasing die self-demouding performance |
| CN101417875A (en) * | 2008-11-28 | 2009-04-29 | 江苏大学 | Use of high temperature superconduction material in antifriction, abrasion-proof and lubrication |
-
2011
- 2011-03-15 CN CN201110061659.4A patent/CN102672800B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956452A (en) * | 1973-08-16 | 1976-05-11 | Shinagawa Firebrick, Co., Ltd. | Dry-type isostatic pressing method involving minimization of breaks or cracks in the molded bodies |
| JPH03164207A (en) * | 1989-11-24 | 1991-07-16 | Suzuki Motor Corp | Mold for ceramic |
| JPH1080910A (en) * | 1996-09-09 | 1998-03-31 | Ishikawajima Harima Heavy Ind Co Ltd | Molding method for thin molding |
| CN1657253A (en) * | 2005-02-04 | 2005-08-24 | 淄博德惠来装饰瓷板有限公司 | Method and device for shaping fiber ceramic plate |
| CN101168844A (en) * | 2007-11-30 | 2008-04-30 | 重庆工学院 | Treatment method for increasing die self-demouding performance |
| CN101417875A (en) * | 2008-11-28 | 2009-04-29 | 江苏大学 | Use of high temperature superconduction material in antifriction, abrasion-proof and lubrication |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982562A (en) * | 2018-08-03 | 2018-12-11 | 武汉科技大学 | The preparation method of cobalt internal standard XRF analysis sheet glass based on assisted ejection agent |
| CN108982562B (en) * | 2018-08-03 | 2021-02-19 | 武汉科技大学 | Preparation method of cobalt internal standard XRF (X-ray fluorescence) analysis glass sheet based on release assisting agent |
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Effective date of registration: 20190703 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |