CN105777131A - Threaded silicon carbide ceramic composite material grinding barrel and preparation method - Google Patents
Threaded silicon carbide ceramic composite material grinding barrel and preparation method Download PDFInfo
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- CN105777131A CN105777131A CN201610086112.2A CN201610086112A CN105777131A CN 105777131 A CN105777131 A CN 105777131A CN 201610086112 A CN201610086112 A CN 201610086112A CN 105777131 A CN105777131 A CN 105777131A
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- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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Abstract
The invention relates to a threaded silicon carbide ceramic composite material grinding barrel.The grinding barrel is made from a silicon carbide composite material, the mass content of silicon carbide and boron carbide in the silicon carbide composite material is greater than or equal to 85 wt%, the outer surface of the grinding barrel is provided with a concave and convex alternated threaded structure, the threaded structure continuously extends to assembly ports formed in two ends of the grinding barrel, the thickness of the grinding barrel is 8-40 mm, the specific value of the thread bottom diameter to a thread pitch of the threaded structure is 5-25, the tooth width of the threaded structure is 3-12 mm, and the tooth height is 5-20 mm.the hardness and abrasion resistance of the grinding barrel are improved by adding boron carbide powder, impurities introduced in the manufacturing process are decreased, and the later purification work of grinded materials is simplified.The strength and toughness are improved by introducing carbon fiber, the fracture toughness and thermal shock resistance of grinding barrel are improved, the service life of the grinding barrel is remarkably prolonged, the heat dissipation area is increased, the heat dissipation efficiency of the grinding barrel is improved, and the production efficiency is greatly improved.
Description
Technical field
The present invention relates to a kind of screw-type composite silicon carbide ceramic material grinding drum and preparation method, belongs to silicon carbide articles technical field.
Background technology
Grinding drum is the grinder agent set for grinding, persistently to be clashed into by material in process of production.Grinding drum
Performance directly influences the service life of lapping device, grinding efficiency and precision.Fast, the poor toughness for solution common grinding bucket heating
The problem such as low with service life, researcher have employed a lot of method and improves grinding drum.Grinding drum mainly uses three kinds at present
Material: 1, stainless steel material；The grinding drum that stainless steel surfaces nitriding makes, but service life is short, and have each metal ion species
Contaminated material, can only process the material of Mohs' hardness less than 5 grades, and 2, polyurethane material；Cost is low, but polyurethane heat dispersion
Difference, softening temperature low (only 80 DEG C), in process of lapping, temperature of charge steeply rises, and makes polyurethane fuse into material, makes thing
The purity of material declines, and even scraps.3, carbofrax material；It is high that silicon carbide ceramics has hardness, resistance to strong temperature, resistance to oxidation, corrosion resistant
Erosion, elevated temperature strength is high, and decomposition temperature is high (higher than 2400 DEG C), and chemical stability is good, good thermal shock, thermal conductivity high advantage,
It is widely used at numerous areas such as Industrial Stoves, oil, metallurgy, chemical industry, machinery, Aero-Space.But should in reality
Using middle discovery, toughness, radiating efficiency and the thermal shock resistance of pure silicon carbide ceramics grinding drum are poor, especially silicon carbide reaction-sintered
The existence of middle free silica causes material to have higher fragility so that it is be easily broken off under the working condition of metallic solution rapid heat cycle.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of screw-type composite silicon carbide ceramic material grinding drum, this grinding drum with
Carbon fiber is toughness reinforcing enhancing phase, and with screw thread as auxiliary-radiating structure, good toughness, radiating efficiency are high, and service life is long.
The present invention provides the preparation method of a kind of screw-type composite silicon carbide ceramic material grinding drum.
The second object of the present invention is to provide the application in grinder of a kind of screw-type composite silicon carbide ceramic material grinding drum.
The present invention realizes by the following technical solutions:
A kind of screw-type composite silicon carbide ceramic material grinding drum, described grinding drum is drum type, and the outer surface at grinding drum is arranged
Having concavo-convex alternate helicitic texture, helicitic texture continuously extends at the installation opening at grinding drum two ends, and the thickness of grinding drum is
8-40mm, the core diameter of thread of helicitic texture and the ratio of pitch are 5-25, and the facewidth of helicitic texture is 3-12mm, and tooth depth is
5-20mm。
Currently preferred, described grinding drum uses composite material of silicon carbide to prepare, carborundum and carbonization in composite material of silicon carbide
The mass content of boron is more than or equal to 85wt%, in terms of the gross weight of composite material of silicon carbide.
Currently preferred, grinding drum bucket wall thickness is 20-30mm.
Currently preferred, the core diameter of thread is 10-15mm with the ratio of pitch.
Currently preferred, the facewidth of helicitic texture is 4-6mm.
Currently preferred, the tooth depth of helicitic texture is 10-20mm.
Currently preferred, composite material of silicon carbide, parts by weight of raw materials is as follows: carborundum powder 70～80 parts, boron carbide powder 5～
10 parts, powdered carbon 4～10 parts, chopped carbon fiber 5～10 parts, binding agent 1～8 parts.
Currently preferred, composite material of silicon carbide, parts by weight of raw materials is as follows: carborundum powder 70～80 parts, boron carbide powder 5～
10 parts, powdered carbon 6～8 parts, chopped carbon fiber 5～10 parts, binding agent 2～3 parts.
Currently preferred, described chopped carbon fiber a diameter of 6～20 μm, average length is 3～10mm.
Described binding agent is polyvinyl alcohol and/or polyvinylpyrrolidone.
The preparation method of above-mentioned screw-type composite silicon carbide ceramic material grinding drum, including dispensing, molding, processing, heat treatment,
High temperature sintering, step is as follows:
(1) dispensing and batch mixing: take carborundum powder, boron carbide powder, chopped carbon fiber by proportioning, adds powdered carbon, binding agent and water
By mix homogeneously, the viscosity of regulation slurry to 500-800mPa S；
(2) molding: by prepared slurry, slurry obtains composite material of silicon carbide base substrate through injection forming；
(3) pre-burning: grinding drum base substrate carries out heat treatment in nitrogen atmosphere, heat treatment temperature is 800-1000 DEG C, temperature retention time
For 2-4 hour, obtain the grinding drum base substrate after heat treatment；
(4) green machined: the composite material of silicon carbide base substrate machining after molding is prepared grinding drum base substrate, grinding drum base
Body is provided with concavo-convex alternate helicitic texture at the outer surface of grinding drum, and helicitic texture continuously extends to grinding drum from grinding drum bottom
Top；
(5) being sintered in high temperature sintering furnace by the grinding drum base substrate after processing, sintering temperature is 1500-1800 DEG C, temperature retention time
For 2-6 hour, naturally cool to room temperature, obtain screw-type composite silicon carbide ceramic material grinding drum.
Currently preferred, before in step (1), chopped carbon fiber adds, first process as follows: by chopped carbon fiber
It is placed under inert gas shielding atmosphere at 700-900 DEG C, calcines 30-90min, then, in ultrasonic washing unit with ethanol be
Medium dispersion 40-80min, adds in material；Described noble gas is nitrogen, and supersonic frequency is 40～100KHZ.
Currently preferred, in step (1), the addition of water accounts for carborundum powder, boron carbide powder, chopped carbon fiber, powdered carbon and glues
The 20～40% of knot agent material gross mass.
Currently preferred, the addition of binding agent accounts for the 1-8wt% of material total amount, it is preferred that the addition of binding agent accounts for material
The 2-3wt% of total amount, the addition of powdered carbon accounts for the 5-10wt% of material total amount, it is preferred that the addition of powdered carbon accounts for material total amount
6-8wt%.
Currently preferred, grinding drum base substrate is placed in the vacuum graphite resistance furnace of full nitrogen and carries out heat treatment by step (3),
Heat treatment temperature is at 850-950 DEG C, and temperature retention time is 3-4 hour, and heating rate is 2-4 DEG C/min.
Currently preferred, after grinding drum base substrate after step (4) described heat treatment is weighed, the silicon of 0.6-1.5 times is placed in and grinds
The bottom of grinding barrel green compact, sinters in high temperature sintering furnace under vacuum, and sintering temperature is 1600-1700 DEG C, and temperature retention time is
4-6 hour, heating rate was 1-5 DEG C/min.
The screw-type composite silicon carbide ceramic material grinding drum of the present invention is applied on grinder.
The present invention is by being designed to continuous print helicitic texture by the outer wall of grinding drum, and uses composite silicon carbide ceramic material, it is thus achieved that
Beyond thought effect, its wearability and toughness increase, radiating efficiency significantly improves, it is possible to want for crudy and precision
Seek higher material.
The invention provides a kind of screw-type composite silicon carbide ceramic material grinding drum and preparation method thereof, the material used is anti-
Answer sintered silicon carbide ceramics composite.What grinding drum designed is shaped as column type, and cooling medium enters from the water inlet of grinder
To the inner chamber of composite material of silicon carbide grinding drum Yu grinder shell, flow out along screw channel from the outlet of other end grinder,
It is specifically shown in Fig. 3.This design increases the contact area of grinding drum wall and cooling medium, makes the radiating efficiency of grinding drum improve.
Additionally, present invention also offers the preparation method of this composite silicon carbide ceramic material grinding drum, injection forming can be passed through, pottery
The machining of base substrate, then prepares through pre-burning, vacuum reaction sintering.Composite silicon carbide ceramic material prepared in accordance with the present invention
Grinding drum, wearability and good toughness, radiating efficiency height, it is possible to for adding of the material high to purity requirement, milling time is longer
Work, is widely used in the industry-by-industries such as the energy, coating, machine-building.
The import and export size of described grinding drum screw thread is determined by actually used rate-of flow and pressure, and it is not specifically limited, only
Otherwise the goal of the invention generation to the present invention limits.
Advantages of the present invention:
1. the present invention improves grinding drum hardness and wearability by adding boron carbide powder, decreases the introducing of impurity in the course of processing,
Simplify the Purification in ground material later stage.
2. the present invention is toughness reinforcing by introducing fibre reinforced, improves fracture toughness and the thermal shock resistance of grinding drum so that it is use
Life-span significantly improves；
3. the present invention is by thread cutting on biscuit, increases area of dissipation, improves the radiating efficiency of grinding drum, be greatly improved
Production efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the screw-type composite silicon carbide ceramic material grinding drum of the present invention；
Fig. 2 is the sectional structure schematic diagram in Fig. 1 screw-type composite silicon carbide ceramic material grinding drum A-A direction；
Fig. 3 is the sectional structure schematic diagram that the grinding drum of the present invention is assembled into grinder.
Wherein: 1, grinding drum, 2, helicitic texture, 3, material inlet, 4, material outlet, 5, grinder shell, 6, grind
Grinding machine water inlet, 7, grinder outlet, 8, assembling end closure；Φ 3-Φ 1 is grinding drum bucket wall thickness, and L1 is grinding drum
Highly, L2 is the degree of depth of installation opening, and Φ 3 is the external diameter of grinding drum, and Φ 1 is the internal diameter of grinding drum, and Φ 4 is screw thread biscuit external diameter,
L3 is the pitch of helicitic texture, and L4 is the facewidth of helicitic texture, and b is the tooth depth of helicitic texture；
Detailed description of the invention
The present invention is expanded on further below in conjunction with specific embodiment.These embodiments are merely to illustrate the present invention, rather than limit
The scope of the present invention.Unless otherwise indicated, in the present invention, all of number is weight portion, and all of proportion by subtraction is weight percentage.
Embodiment 1
A kind of screw-type composite silicon carbide ceramic material grinding drum, as shown in Figure 1 and Figure 2, described grinding drum is drum type to structure,
Outer surface at grinding drum is provided with concavo-convex alternate helicitic texture, and helicitic texture continuously extends at the installation opening at grinding drum two ends,
The thickness of grinding drum is 8.5mm, and the core diameter of thread of helicitic texture and the ratio of pitch are 10, and the facewidth of helicitic texture is 6mm,
Tooth depth is 12mm.
Currently preferred, described grinding drum uses composite material of silicon carbide to prepare, carborundum and carbonization in composite material of silicon carbide
The mass content of boron is more than or equal to 85wt%, in terms of the gross weight of composite material of silicon carbide.Composite material of silicon carbide, raw material weight
Part is as follows: carborundum powder 75 parts, boron carbide powder 5 parts, powdered carbon 8 parts, chopped carbon fiber 8 parts, binding agent 4 parts.
The preparation method of screw-type composite silicon carbide ceramic material grinding drum, including dispensing, molding, processing, heat treatment, high temperature
Sintering, step is as follows:
The chopped carbon fiber of 1-20mm is placed in nitrogen atmosphere electric furnace at 750 DEG C, calcines 50min, then at ultrasonic washing unit
In disperse 60min with ethanol for medium, obtain finely disseminated chopped strand.Chopped carbon fiber after processing by 8wt%, 8wt%
Powdered carbon, 75wt% carborundum powder, 5wt% boron carbide powder, 4wt%PVP binding agent and the water of all solids raw material 30%.Often
Pressure, temperature 25 DEG C, injection forming shape the biscuit of Φ 380 × Φ 345mm × 520, and suction time is 4 hours.By base substrate at 50 DEG C
Low temperature chamber dry 48 hours, then move into hot room that temperature is 80 DEG C and dry 48 hours.After base substrate is completely dried, by molding
Body carries out heat treatment under nitrogen atmosphere is protected, and the temperature of heat treatment is 800 DEG C, and temperature retention time is 4 hours, and heating rate is 2 DEG C
/min.Then the base substrate after pre-burning is processed on Digit Control Machine Tool.Screw thread biscuit external diameter after processing is 374mm, screw thread
Bucket internal diameter is 353.5mm, and grinding drum bucket wall thickness 8.5mm, pitch is 30mm, and the facewidth is 6mm, tooth depth is 12mm.?
Under vacuum, condition of negative pressure, the molded body after heat treatment carries out reaction-sintered, and the silica flour amount of weighing is need silicon amount 1.2 times.Reaction is burnt
The maximum temperature of knot is 1700 DEG C, temperature retention time 2.5 hours.Furnace cooling, can be prepared by screw-type composite material of silicon carbide and grinds
Bucket blank.The blank of the screw-type grinding drum after cleaning is installed on process equipment, carries out polish.The internal diameter of product
Controlling at 350 ± 0.1mm, the outside diameter control of product reaches 1.6 in 370 ± 0.03mm, the fineness of product, it is ensured that product is being installed
Time combine closely.
After testing, obtained screw-type carbon/carbon/silicon carbide composite material grinding drum wearability is 0.86, and fracture toughness is
4.94MPa·m1/2, radiating efficiency improves 78%.
Embodiment 2:
A kind of screw-type composite silicon carbide ceramic material grinding drum, as shown in Figure 1 and Figure 2, described grinding drum is drum type to structure,
Outer surface at grinding drum is provided with concavo-convex alternate helicitic texture, and helicitic texture continuously extends at the installation opening at grinding drum two ends,
The thickness of grinding drum is 15mm, and the core diameter of thread of helicitic texture and the ratio of pitch are 10, and the facewidth of helicitic texture is 8mm,
Tooth depth is 15mm.
Currently preferred, described grinding drum uses composite material of silicon carbide to prepare, carborundum and carbonization in composite material of silicon carbide
The mass content of boron is more than or equal to 85wt%, in terms of the gross weight of composite material of silicon carbide.Composite material of silicon carbide, raw material weight
Part is as follows: carborundum powder 70 parts, boron carbide powder 10 parts, powdered carbon 5 parts, chopped carbon fiber 10 parts, binding agent 5 parts.
The preparation method of screw-type composite silicon carbide ceramic material grinding drum, including dispensing, molding, processing, heat treatment, high temperature
Sintering, step is as follows:
The chopped carbon fiber of 5-10mm is placed in nitrogen atmosphere electric furnace at 800 DEG C, calcines 30min, then in ultrasonic waves for cleaning
Machine disperses 40min with ethanol for medium, obtains finely disseminated chopped strand.By 10wt% process after chopped carbon fiber,
5wt% powdered carbon, 70wt% carborundum powder, 10wt% boron carbide powder, 6wt%PVP dispensing and the water of all solids raw material 30%.
At ambient pressure, temperature 25 DEG C, injection forming shape Φ 430 × Φ 400mm × 550 biscuit, suction time is 6 hours.By base
Body is dried 72 hours at the low temperature chamber of 40 DEG C, then moves into the hot room that temperature is 90 DEG C and dries 36 hours.Base substrate is completely dried
After, by base substrate pre-burning in a nitrogen atmosphere, calcined temperature is 1000 DEG C, is incubated 2 hours, and heating rate is 4 DEG C/min.Will
Base substrate after pre-burning, is processed on Digit Control Machine Tool.Screw thread biscuit external diameter after processing is 434mm, and threaded barrel internal diameter is
404mm, grinding drum bucket wall thickness 15mm, pitch is 35mm, and the facewidth is 8mm, tooth depth is 15mm.In vacuum, bear
Under the conditions of pressure, the screw-type composite silicon carbide ceramic material grinding drum making car carries out reaction-sintered, and the silica flour amount of weighing is theoretical
Need 1.5 times of silicon amount.The maximum temperature of reaction-sintered is 1600 DEG C, temperature retention time 4 hours.Furnace cooling, can be prepared by spiral shell
Stricture of vagina formula composite material of silicon carbide grinding drum blank.The blank of the screw-type grinding drum after cleaning is installed on process equipment,
Carry out polish.The internal diameter of product controls at 400 ± 0.1mm, the outside diameter control of product at 430 ± 0.03mm, product bright and clean
Degree reaches 1.5, it is ensured that product combining closely when mounted.
After testing, obtained screw-type carbon/carbon/silicon carbide composite material grinding drum wearability is 0.53, and fracture toughness is
5.83MPa·m1/2, radiating efficiency improves 91%.
Embodiment 3:
A kind of screw-type composite silicon carbide ceramic material grinding drum, as shown in Figure 1 and Figure 2, described grinding drum is drum type to structure,
Outer surface at grinding drum is provided with concavo-convex alternate helicitic texture, and helicitic texture continuously extends at the installation opening at grinding drum two ends,
The thickness of grinding drum is 23mm, and the core diameter of thread of helicitic texture and the ratio of pitch are 10, and the facewidth of helicitic texture is 9mm,
Tooth depth is 18mm.
Currently preferred, described grinding drum uses composite material of silicon carbide to prepare, carborundum and carbonization in composite material of silicon carbide
The mass content of boron is more than or equal to 85wt%, in terms of the gross weight of composite material of silicon carbide.Composite material of silicon carbide, raw material weight
Part is as follows: carborundum powder 80 parts, boron carbide powder 8 parts, powdered carbon 4 parts, chopped carbon fiber 6 parts, binding agent 2 parts.
The preparation method of screw-type composite silicon carbide ceramic material grinding drum, including dispensing, molding, processing, heat treatment, high temperature
Sintering, step is as follows:
The chopped carbon fiber of 10-15mm is placed in nitrogen atmosphere electric furnace at 900 DEG C, calcines 30min, then clear at ultrasound wave
Washing machine disperses 40min with ethanol for medium, obtains finely disseminated chopped strand.By 6wt% chopped carbon fiber, 4wt% charcoal
Powder, 80wt% carborundum powder, 8wt% boron carbide powder, 2wt%PVP dispensing and the water of all solids raw material 25%.At normal pressure
Under, temperature 25 DEG C, injection forming shape Φ 480 × Φ 440mm × 600 biscuit, suction time is 8 hours.By base substrate at 40 DEG C
Low temperature chamber dry 96 hours, then move into hot room that temperature is 80 DEG C and dry 48 hours.After base substrate is completely dried, at nitrogen
Heat treatment under gas atmosphere, heat treatment temperature is 900 DEG C, is incubated 4 hours, and heating rate is 3 DEG C/min.Then by after pre-burning
Base substrate is processed at Digit Control Machine Tool.Screw thread biscuit external diameter after processing is 485mm, and threaded barrel internal diameter is 444mm, grinding drum
Bucket wall thickness 23mm, pitch is 36mm, and the facewidth is 9mm, tooth depth is 18mm.By molded body at vacuum, condition of negative pressure
Under, heat treated screw-like composite silicon carbide ceramic material grinding drum is carried out reaction-sintered, the silica flour amount of weighing is that theory needs silicon
1.3 times of amount.The maximum temperature of reaction-sintered is 1650 DEG C, temperature retention time 6 hours.Furnace cooling, can be prepared by screw-type
Composite silicon carbide ceramic material grinding drum blank.The blank of the screw-type grinding drum after cleaning is installed on process equipment,
Carry out polish.The internal diameter of product controls at 440 ± 0.1mm, the outside diameter control of product at 480 ± 0.03mm, product bright and clean
Degree reaches 1.6, it is ensured that product combining closely when mounted.
After testing, obtained screw-type carbon/carbon/silicon carbide composite material grinding drum wearability is 0.65, and fracture toughness is
4.49MPa·m1/2, radiating efficiency improves 73%.
Only several specific embodiments of the present invention it should be noted that listed above, it is clear that the present invention be not limited only to
Upper embodiment, it is also possible to have other to deform.Those skilled in the art directly derives from the disclosure of invention or indirectly amplifies
All deformation, are all considered as protection scope of the present invention.
Comparative example 1
A kind of screw-type composite silicon carbide ceramic material grinding drum, with embodiment 1, difference is:
Grinding drum biscuit external diameter after processing is 374mm, and internal diameter is 353.5mm, non-threaded.Add in two grinding drums simultaneously
Entering 30L material, particle size is 2-6mm, grinds 1h.After testing, if the radiating efficiency of grinding drum is 1 in comparative example 1, then real
Executing the radiating efficiency of grinding drum in example 1 is 1.
Comparative example 2
A kind of screw-type composite silicon carbide ceramic material grinding drum, with embodiment 1, difference is, at the bottom of the screw thread of helicitic texture
Footpath is 35 with the ratio of pitch, and the facewidth is 20mm, tooth depth is 4mm.In two grinding drums, add 30L material, granule simultaneously
A size of 1-4mm, grinds 1h.After testing, comparative example 2 radiating efficiency is 1.21%.
Comparative example 3
A kind of screw-type composite silicon carbide ceramic material grinding drum, with embodiment 1, difference is:
By 15wt% powdered carbon, 80wt% carborundum powder, 5wt%PVP dispensing and the water of all solids raw material 30%, prepare material.
Grinding drum prepared by above-mentioned material, screw-type carbon/carbon/silicon carbide composite material grinding drum wearability obtained after testing is 1.1, fracture
Toughness is 3.96MPa m1/2。
Experimental example:
Embodiment 1-3 and comparative example 1-3 are applied in grinder, the model of grinder is LSML-50, LSML-60,
LSML-80 and LSM-50, LSMD-50, LSD-50.Grinder is respectively put into the zirconia ball that medium is 0.8-2.0mm, system
Standby superfine zirconia powder, the particle size of material is 0.5-1mm.According to the difference of grinder, add the medium of corresponding weight
And material, grind 1 hour, test radiating efficiency, and according to the wearability of corresponding standard testing respective material and fracture toughness.
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Radiating efficiency η | 1.73 | 1.91 | 1.78 | 1 | 1.21 | 1.0.8 |
| Wearability | 0.86 | 0.53 | 0.65 | 0.86 | 0.86 | 1.1 |
| Fracture toughness (MPa m1/2) | 4.94 | 5.83 | 4.49 | 4.94 | 4.94 | 3.96 |
Claims (10)
1. a screw-type composite silicon carbide ceramic material grinding drum, described grinding drum is drum type, it is characterised in that grinding
The outer surface of bucket is provided with concavo-convex alternate helicitic texture, and helicitic texture continuously extends at the installation opening at grinding drum two ends, grinds
The thickness of bucket is 8-40mm, and the core diameter of thread of helicitic texture and the ratio of pitch are 5-25, and the facewidth of helicitic texture is 3-12mm,
Tooth depth is 5-20mm.
Screw-type composite silicon carbide ceramic material grinding drum the most according to claim 1, it is characterised in that described grinding drum
Employing composite material of silicon carbide prepares, and in composite material of silicon carbide, carborundum and the mass content of boron carbide are more than or equal to 85wt%,
In terms of the gross weight of composite material of silicon carbide.
Screw-type composite silicon carbide ceramic material grinding drum the most according to claim 1, it is characterised in that grinding drum bucket wall
Thickness is 20-30mm, and the core diameter of thread is 10-15mm with the ratio of pitch, and the facewidth of helicitic texture is 4-6mm, helicitic texture
Tooth depth be 10-20mm.
Screw-type composite silicon carbide ceramic material grinding drum the most according to claim 2, it is characterised in that silicon carbide compound
Material, parts by weight of raw materials is as follows: carborundum powder 70～80 parts, boron carbide powder 5～10 parts, powdered carbon 4～10 parts, chopped carbon
Fiber 5～10 parts, binding agent 1～8 parts.
Screw-type composite silicon carbide ceramic material grinding drum the most according to claim 2, it is characterised in that silicon carbide compound
Material, parts by weight of raw materials is as follows: carborundum powder 70～80 parts, boron carbide powder 5～10 parts, powdered carbon 6～8 parts, and chopped carbon is fine
Tie up 5～10 parts, binding agent 2～3 parts.
Screw-type composite silicon carbide ceramic material grinding drum the most according to claim 5, it is characterised in that described chopped
Carbon fiber diameter is 6～20 μm, and average length is 3～10mm, and described binding agent is polyvinyl alcohol and/or polyvinylpyrrolidone.
7. the preparation method of the screw-type composite silicon carbide ceramic material grinding drum described in claim 1, including dispensing, molding,
Processing, heat treatment, high temperature sintering, step is as follows:
(1) dispensing and batch mixing: take carborundum powder, boron carbide powder, chopped carbon fiber by proportioning, adds powdered carbon, binding agent and water
By mix homogeneously, the viscosity of regulation slurry to 500-800mPa S；
(2) molding: by prepared slurry, slurry obtains composite material of silicon carbide base substrate through injection forming；
(3) pre-burning: grinding drum base substrate carries out heat treatment in nitrogen atmosphere, heat treatment temperature is 800-1000 DEG C, temperature retention time
For 2-4 hour, obtain the grinding drum base substrate after heat treatment；
(4) green machined: the composite material of silicon carbide base substrate machining after molding is prepared grinding drum base substrate, grinding drum base
Body is provided with concavo-convex alternate helicitic texture at the outer surface of grinding drum, and helicitic texture continuously extends to grinding drum from grinding drum bottom
Top；
(5) being sintered in high temperature sintering furnace by the grinding drum base substrate after processing, sintering temperature is 1500-1800 DEG C, temperature retention time
For 2-6 hour, naturally cool to room temperature, obtain screw-type composite silicon carbide ceramic material grinding drum.
The preparation method of screw-type composite silicon carbide ceramic material grinding drum the most according to claim 7, it is characterised in that
Before in step (1), chopped carbon fiber adds, first process as follows: chopped carbon fiber is placed in inert gas shielding gas
At 700-900 DEG C, calcine 30-90min under atmosphere, then, in ultrasonic washing unit, disperse 40-80min with ethanol for medium,
Add in material；Described noble gas is nitrogen, and supersonic frequency is 40～100KHZ.
The preparation method of screw-type composite silicon carbide ceramic material grinding drum the most according to claim 7, it is characterised in that
In step (1), the addition of water accounts for carborundum powder, boron carbide powder, chopped carbon fiber, powdered carbon and binder material gross mass
20～40%.
The preparation method of screw-type composite silicon carbide ceramic material grinding drum the most according to claim 7, it is characterised in that
The addition of binding agent accounts for the 1-8wt% of material total amount, it is preferred that the addition of binding agent accounts for the 2-3wt% of material total amount, charcoal
The addition of powder accounts for the 5-10wt% of material total amount, it is preferred that the addition of powdered carbon accounts for the 6-8wt% of material total amount；Step (3)
Being placed in the vacuum graphite resistance furnace of full nitrogen by grinding drum base substrate and carry out heat treatment, heat treatment temperature, at 850-950 DEG C, is incubated
Time is 3-4 hour, and heating rate is 2-4 DEG C/min；After grinding drum base substrate after step (4) described heat treatment is weighed, will
The silicon of 0.6-1.5 times is placed in the bottom of grinding drum green compact, sinters under vacuum in high temperature sintering furnace, and sintering temperature is
1600-1700 DEG C, temperature retention time is 4-6 hour, and heating rate is 1-5 DEG C/min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107790254A (en) * | 2017-10-31 | 2018-03-13 | 天津仁义合自动化技术股份有限公司 | One kind is applied to sheet material blank and waste material breaker |
| CN112430113A (en) * | 2020-12-31 | 2021-03-02 | 泰州华航精密铸造有限公司 | Novel reaction sintering SiC ceramic material and preparation method thereof |
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