CN103567403B - A kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof - Google Patents
A kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof Download PDFInfo
- Publication number
- CN103567403B CN103567403B CN201310487262.0A CN201310487262A CN103567403B CN 103567403 B CN103567403 B CN 103567403B CN 201310487262 A CN201310487262 A CN 201310487262A CN 103567403 B CN103567403 B CN 103567403B
- Authority
- CN
- China
- Prior art keywords
- continuous casting
- horizontal continuous
- casting crystallizer
- graphite cannula
- high purity
- 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.)
- Active
Links
Landscapes
- Ceramic Products (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses a kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof, this graphite cannula is made up of the raw material of following mass fraction: chopped carbon fiber 10-20%, and surplus is high purity graphite powder; The diameter of described chopped carbon fiber is 3-5 μm, and length is 5-10mm, intensity 2400MPa, modulus 350GPa.The present invention is a kind of horizontal continuous casting crystallizer graphite cannula, by adding chopped carbon fiber in the high purity graphite powder of routine, the tensile strength of graphite cannula, wearability and service life can be significantly improved, overcome short problem of the simple horizontal continuous casting crystallizer graphite cannula life-span adopting high purity graphite powder to prepare.Experiment proves, the present invention adds the graphite cannula tensile strength of chopped carbon fiber than the graphite cannula tensile strength not adding chopped carbon fiber, and wearability, service life all significantly improves.
Description
Technical field
The present invention relates to a kind of horizontal continuous casting crystallizer graphite cannula, also relate to the preparation method of this graphite cannula simultaneously, belong to field of material preparation.
Background technology
High purity graphite, has another name called flakey highly-conductive hot carbon powder, have that intensity is high, good thermal shock, high temperature resistant, anti-oxidant, resistance coefficient is little, corrosion-resistant, be easy to the advantages such as accurate machined, be desirable Inorganic Non-metallic Materials.For the graphite anode, grid etc. of the graphite crucible of processing and fabricating electrical heating elements, structure casting die, smelting high-purity metal crucible boat, single crystal growing furnace heater, spark machined graphite, sintering mold, wing, metal electroplating, semiconductor technology, transmitter valve, thyratron and gasetron.
Graphite cannula is the vitals of horizontal continuous casting crystallizer, the thermal shock resistance good due to it and excellent heat conductivity, be widely used in direct motlten metal technique, simultaneously, graphite cannula at high temperature has lubrication, and with the effect of common casting machine " cooling twice ".At present, what graphite cannula adopted is that conventional high purity graphite powder is prepared, often there is short problem in service life in actual use, as the horizontal continuous casting crystallizer graphite cannula for special copper alloy (packfong) in use, make graphite cannula inner surface serious wear owing to being subject to longitudinal tension, cause material surface damage and scrap.
Summary of the invention
The object of this invention is to provide a kind of horizontal continuous casting crystallizer graphite cannula, to improve the tensile strength of graphite cannula, wearability and service life.
In order to realize above object, the technical solution adopted in the present invention is to provide a kind of horizontal continuous casting crystallizer graphite cannula, is made up of the raw material of following mass fraction: chopped carbon fiber 10-20%, and surplus is high purity graphite powder; The diameter of described chopped carbon fiber is 3-5 μm, and length is 5-10mm, intensity 2400MPa, modulus 350GPa.
The particle diameter of described high purity graphite powder is 0.03-0.05 μm.The present invention's high purity graphite used meets the regulation of JB/T2750-2006.
Carbon fiber has the various premium properties of elemental carbon, as little in proportion, heat resistance is fabulous, thermal coefficient of expansion is little.Meanwhile, it has again the flexibility as fiber, can improve payload, improving SNR.
The present invention is a kind of horizontal continuous casting crystallizer graphite cannula, by adding chopped carbon fiber in the high purity graphite powder of routine, the tensile strength of graphite cannula, wearability and service life can be significantly improved, overcome short problem of the simple horizontal continuous casting crystallizer graphite cannula life-span adopting high purity graphite powder to prepare.Experiment proves, the present invention adds the graphite cannula tensile strength of chopped carbon fiber than the graphite cannula tensile strength not adding chopped carbon fiber, and wearability, service life all significantly improves.
The present invention also aims to the preparation method that a kind of horizontal continuous casting crystallizer graphite cannula is provided.
The technical solution adopted in the present invention is also the preparation method providing a kind of horizontal continuous casting crystallizer graphite cannula, comprises the following steps:
1) high purity graphite powder is calcined 10-15min at 1500-1800 DEG C;
2) the high purity graphite powder after calcining is mixed with chopped carbon fiber;
3) by step 2) compound adopt isostatic cool pressing or extruding base;
4) blank of step 3) is sintered 15-20h at 1800-2000 DEG C;
5) profiled member after step 4) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
In step 4), the step of isostatic cool pressing is as follows: first pressure is elevated to 5-10MPa, and pressurize 2-4min, then brings up to 100-180MPa by pressure, after pressurize 20-25min, Pressure Drop is low to moderate 5-10MPa, pressurize 2-4min, finally by Pressure Drop to 0MPa.
The present invention adopts isostatic cool pressing or extruding base to combine with sintering process, prepares pull resistance, wearability is good, the graphite cannula that service life is longer.Preparation method of the present invention significantly can reduce hole in graphite cannula material or gas hole defect, thus improves global density and the performance of graphite cannula, and graphite cannula bulk density of the present invention can reach 1.84g/cm
3, very close with the density of high purity graphite.
Detailed description of the invention
Embodiment 1
The horizontal continuous casting crystallizer graphite cannula of the present embodiment, is made up of the raw material of following mass fraction: chopped carbon fiber 10%, and surplus is high purity graphite powder; Wherein, the diameter of chopped carbon fiber is 3 μm, and length is 5mm, intensity 2400MPa, modulus 350GPa, and the particle diameter of high purity graphite powder is 0.03 μm.
The preparation method of the horizontal continuous casting crystallizer graphite cannula of the present embodiment, comprises the following steps:
1) high purity graphite powder is calcined 15min at 1500 DEG C;
2) the high purity graphite powder after calcining is mixed with chopped carbon fiber;
3) by step 2) compound adopt isostatic cool pressing base, first pressure is elevated to 5MPa, pressurize 4min, then brings up to 180MPa by pressure, after pressurize 23min, pressure is reduced to 5MPa, and pressurize 3min, finally reduces to 0MPa by pressure, takes out blank;
4) blank is sintered 20h at 1800 DEG C;
5) profiled member after step 4) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
Embodiment 2
The horizontal continuous casting crystallizer graphite cannula of the present embodiment, is made up of the raw material of following mass fraction: chopped carbon fiber 15%, and surplus is high purity graphite powder; Wherein, the diameter of chopped carbon fiber is 4 μm, and length is 10mm, intensity 2400MPa, modulus 350GPa, and the particle diameter of high purity graphite powder is 0.04 μm.
The preparation method of the horizontal continuous casting crystallizer graphite cannula of the present embodiment, comprises the following steps:
1) high purity graphite powder is calcined 10min at 1800 DEG C;
2) the high purity graphite powder after calcining is mixed with chopped carbon fiber;
3) by step 2) compound adopt isostatic cool pressing base, first pressure is elevated to 10MPa, pressurize 3min, then brings up to 150MPa by pressure, after pressurize 25min, pressure is reduced to 10MPa, and pressurize 2min, finally reduces to 0MPa by pressure, takes out blank;
4) blank is sintered 15h at 2000 DEG C;
5) profiled member after step 4) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
Embodiment 3
The horizontal continuous casting crystallizer graphite cannula of the present embodiment, is made up of the raw material of following mass fraction: chopped carbon fiber 20%, and surplus is high purity graphite powder; Wherein, the diameter of chopped carbon fiber is 5 μm, and length is 8mm, intensity 2400MPa, modulus 350GPa, and the particle diameter of high purity graphite powder is 0.05 μm.
The preparation method of the horizontal continuous casting crystallizer graphite cannula of the present embodiment, comprises the following steps:
1) high purity graphite powder is calcined 13min at 1600 DEG C;
2) the high purity graphite powder after calcining is mixed with chopped carbon fiber;
3) by step 2) compound adopt isostatic cool pressing base, first pressure is elevated to 8MPa, pressurize 2min, then brings up to 100MPa by pressure, after pressurize 20min, pressure is reduced to 8MPa, and pressurize 4min, finally reduces to 0MPa by pressure, takes out blank;
4) blank is sintered 18h at 1900 DEG C;
5) profiled member after step 4) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
Comparative example
The horizontal continuous casting crystallizer graphite cannula of this comparative example, adopt high purity graphite powder preparation, the particle diameter of high purity graphite powder is 0.05 μm.
The preparation method of the horizontal continuous casting crystallizer graphite cannula of this comparative example, comprises the following steps:
1) high purity graphite powder is calcined 13min at 1600 DEG C;
2) the high purity graphite powder of step 1) is adopted isostatic cool pressing base, first pressure is elevated to 5MPa, pressurize 2min, then pressure is brought up to 100MPa, after pressurize 20min, pressure is reduced to 5MPa, pressurize 2min, finally reduces to 0MPa by pressure, takes out blank;
3) blank is sintered 18h at 1900 DEG C;
4) profiled member after step 3) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
Experimental example 1
The tensile strength analysis of horizontal continuous casting crystallizer graphite cannula of the present invention
The graphite cannula of embodiment 1-3 and comparative example is carried out tensile strength test, and result is as shown in table 1.
The graphite cannula tensile strength test result of table 1 embodiment 1-3 and comparative example
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Tensile strength (MPa) | 10.52 | 9.46 | 8.81 | 7.50 |
As can be seen from Table 1, add the graphite cannula of chopped carbon fiber, its tensile strength significantly improves.
Experimental example 2
The Analysis on Wear of horizontal continuous casting crystallizer graphite cannula of the present invention
Experimental technique: carry out dry wear test on friction wear testing machine, contact is 40N, measures the mass loss during abrasion of sample with the LP3200D electronic analytical balance that sensibility reciprocal is 1mg.
Result is as shown in table 2.
The graphite cannula wearability test result of table 2 embodiment 1-3 and comparative example
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Wearability (mg/m 2） | 4.2 | 5.1 | 5.8 | 6.4 |
As can be seen from Table 2, add the graphite cannula of chopped carbon fiber, its wearability significantly improves.
Experimental example 3
The service life of horizontal continuous casting crystallizer graphite cannula of the present invention is analyzed
Experimental technique: crystallizer graphite cannula embodiment 1-3 and comparative example prepared carries out the horizontal casting installation test of packfong, and the graphite cannula the longest service time of destroying does not occur under investigating equal working condition.
Result is as shown in table 3.
The graphite cannula test result in service life of table 3 embodiment 1-3 and comparative example
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Service life (h) | 3800 | 4000 | 3600 | 1800 |
As can be seen from Table 3, add the graphite cannula of chopped carbon fiber, its service life significantly improves.
Claims (4)
1. a horizontal continuous casting crystallizer graphite cannula, is characterized in that, is made up of the raw material of following mass fraction: chopped carbon fiber 10-20%, and surplus is high purity graphite powder; The diameter of described chopped carbon fiber is 3-5 μm, and length is 5-10mm, intensity 2400MPa, modulus 350GPa;
The preparation method of described horizontal continuous casting crystallizer graphite cannula comprises the following steps:
1) high purity graphite powder is calcined 10-15min at 1500-1800 DEG C;
2) the high purity graphite powder after calcining is mixed with chopped carbon fiber;
3) by step 2) compound adopt isostatic cool pressing or extruding base;
4) blank of step 3) is sintered 15-20h at 1800-2000 DEG C;
5) profiled member after step 4) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
2. horizontal continuous casting crystallizer graphite cannula according to claim 1, is characterized in that, the particle diameter of described high purity graphite powder is 0.03-0.05 μm.
3. a preparation method for horizontal continuous casting crystallizer graphite cannula as claimed in claim 1, is characterized in that, comprise the following steps:
1) high purity graphite powder is calcined 10-15min at 1500-1800 DEG C;
2) the high purity graphite powder after calcining is mixed with chopped carbon fiber;
3) by step 2) compound adopt isostatic cool pressing or extruding base;
4) blank of step 3) is sintered 15-20h at 1800-2000 DEG C;
5) profiled member after step 4) being sintered carries out machined, makes horizontal continuous casting crystallizer graphite cannula.
4. the preparation method of horizontal continuous casting crystallizer graphite cannula according to claim 3, it is characterized in that, in step 4), the step of isostatic cool pressing is as follows: first pressure is elevated to 5-10MPa, pressurize 2-4min, then pressure is brought up to 100-180MPa, after pressurize 20-25min, Pressure Drop is low to moderate 5-10MPa, pressurize 2-4min, finally by Pressure Drop to 0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310487262.0A CN103567403B (en) | 2013-10-17 | 2013-10-17 | A kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310487262.0A CN103567403B (en) | 2013-10-17 | 2013-10-17 | A kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103567403A CN103567403A (en) | 2014-02-12 |
| CN103567403B true CN103567403B (en) | 2015-12-02 |
Family
ID=50040602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310487262.0A Active CN103567403B (en) | 2013-10-17 | 2013-10-17 | A kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103567403B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737891B (en) * | 2017-09-26 | 2019-08-23 | 湖北中一科技股份有限公司 | A kind of production method of the graphite cannula of crystallizer |
| CN108526422B (en) * | 2018-05-23 | 2020-05-19 | 中南大学 | Production method of high-strength high-conductivity heat-resistant copper alloy |
| CN109702156B (en) * | 2019-01-31 | 2020-08-11 | 青岛卓越碳素制品有限公司 | High-speed rail conductor alloy copper rod continuous casting crystallizer and production process thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005335966A (en) * | 2004-05-24 | 2005-12-08 | Jfe Steel Kk | Graphite-containing castable refractory |
| CN101165819A (en) * | 2007-09-13 | 2008-04-23 | 北京航空航天大学 | Preparation process of carbon base sliding block material for track vehicle |
| CN101913887B (en) * | 2010-08-10 | 2013-05-08 | 烟台凯泊复合材料科技有限公司 | High-temperature resistant carbon fibre product and preparation method thereof |
| CN202180179U (en) * | 2011-07-23 | 2012-04-04 | 山西春雷铜材有限责任公司 | Graphite sleeve of crystallizer in concave surface structure for horizontal continuous casting |
| CN202779648U (en) * | 2012-07-24 | 2013-03-13 | 青岛中冶新材料科技有限公司 | Horizontal continuous casting graphite crystallizer under nitrogen protection |
-
2013
- 2013-10-17 CN CN201310487262.0A patent/CN103567403B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103567403A (en) | 2014-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103567403B (en) | A kind of horizontal continuous casting crystallizer graphite cannula and preparation method thereof | |
| CN103911565B (en) | A kind of high conductive graphite whisker orientation strengthens the preparation method of metal-base composites | |
| JP5350553B1 (en) | Heat sink using Cu-diamond based solid phase sintered body with excellent heat resistance, device for electronics using the heat sink, and heat sink using Cu-diamond based solid phase sintered body with excellent heat resistance Manufacturing method | |
| WO2012127958A1 (en) | Composite member provided with substrate formed from composite material | |
| CN104532041B (en) | A kind of Mo2niB2the preparation technology of based ceramic metal | |
| CN109940156B (en) | Method for preparing diamond/copper heat-conducting composite material part through 3D printing near-net-shape forming | |
| JP2009248164A (en) | Aluminum-graphite-silicon carbide composite and manufacturing method thereof | |
| PH12018550142B1 (en) | Lightweight high-conductivity heat-resistant aluminum wire and preparation method therefor | |
| EP2621035B1 (en) | Spark plug electrode, method for producing same, spark plug, and method for producing spark plug | |
| Sun et al. | Highly thermal-conductive graphite flake/Cu composites prepared by sintering intermittently electroplated core-shell powders | |
| Zheng et al. | Investigation on preparation and mechanical properties of W–Cu–Zn alloy with low W–W contiguity and high ductility | |
| CN106521251B (en) | The molding equipment and its method of a kind of low bulk, highly thermally conductive SiCp/Al composite material | |
| CN110551909B (en) | Method for improving heat conductivity of magnesium-based composite material by using nano diamond and magnesium-based composite material | |
| CN113337747B (en) | Preparation method of high-strength and high-conductivity copper alloy | |
| WO2020110824A1 (en) | Heat dissipation member | |
| Fan et al. | High thermal conductivity and mechanical properties of Si@ Graphite/Aluminum nitride/aluminum composites for high-efficiency thermal management | |
| CN113843298B (en) | Preparation method of Kovar alloy coated Cu core composite bar | |
| CN101225890B (en) | High temperature resistant corrosion resistant high-strength plumbago------carbon composite valve | |
| TWI565795B (en) | Method of manufacturing heat sink plate having excellent thermal conductivity in thickness direction and heat sink plate manufactured by the same | |
| CN111636006B (en) | Aluminum-silicon alloy graphite composite heat conduction material and preparation and application thereof | |
| US8729783B2 (en) | Spark plug electrode, method for producing same, spark plug, and method for producing spark plug | |
| CN104651655A (en) | Preparation method of graphite-reinforced aluminum-based composite material | |
| CN114835496B (en) | Cr (chromium) 3 C 2 Preparation method of block material | |
| WO2017075741A1 (en) | Novel high-strength nanoscale silicon carbide copper-based composite alloy material for high-speed locomotive gears | |
| CN109853016A (en) | A kind of 3D printing powder feeding pipe and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |