CN105538167B - A kind of preparation method of compound impeller head stream ball pipe - Google Patents
A kind of preparation method of compound impeller head stream ball pipe Download PDFInfo
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- CN105538167B CN105538167B CN201510876689.9A CN201510876689A CN105538167B CN 105538167 B CN105538167 B CN 105538167B CN 201510876689 A CN201510876689 A CN 201510876689A CN 105538167 B CN105538167 B CN 105538167B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/16—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on nitrides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C6/00—Coating by casting molten material on the substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
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Abstract
The present invention relates to the standby technical field of impeller head stream ball control, specifically a kind of preparation method of compound impeller head stream ball pipe.Its raw material is respectively in mass ratio：80 ~ 85 parts of alpha-silicon nitride powders, 5 ~ 10 parts of boron nitride nanometer pipe powder, 4 ~ 6 parts of alumina powder, 3 ~ 5 parts of yttrium oxide powder.The method that impeller head stream ball pipe is prepared with the material, comprises the following steps：Raw material is prepared, and raw material mixing, slurry preparation, injection forming dries the demoulding, vacuum-sintering and composite casting.The material of the present invention for preparing has excellent mechanics and tribological property, prepared impeller head stream ball pipe has extremely strong hardness and excellent wearability, and the described method for preparing impeller head stream ball pipe has technical process simple, advantage simple and efficient to handle, meets the requirement of actual industrial production.
Description
Technical field
The present invention relates to the standby technical field of impeller head stream ball control, specifically a kind of system of compound impeller head stream ball pipe
Preparation Method.
Background technology
With continuing to develop for industry, in technical field of surface, ball blast technology applies ten in current industrial production
Divide extensive, the equipment used in ball blast technology is shot-blasting machine.Shot-blasting machine is that steel sand shot is dished out impact at a high speed by impeller head
A kind for the treatment of technology on objects of material surface, burr and iron rust for removing workpiece surface, can also for workpiece some
The surface of partial coating removes the pollutant on surface, and provides the surface profile adhesive force of an increase coating, reaches reinforcing work
The purpose of part.For other surfaces treatment technology, it has faster, more effective feature.
Most crucial part is impeller head in shot-blasting machine, and when shot-blasting machine works, shot steel sand enters impeller head by stream ball pipe
In, blade is reached by orienting cover window after rotating shot wheel acceleration, dishes out under the action of the centrifugal force, gets to workpiece surface
On, to reach the purpose of cleaning or reinforcing.
In actual industrial production, because bullet constantly flows in impeller head, this is just carried to the wearability of impeller head
Go out very high requirement, and the stream ball pipe of impeller head is the part being most easily worn, so improving the wear-resisting of impeller head stream ball pipe
Property, become the key technology of reduction impeller head scrappage.
Stream ball pipe used is made up of cast iron materials in current industrial production, in long-term use, due to shot steel sand
Continuous flow at high speed, makes it easily be worn, and scraps impeller head, greatly reduces industrial production efficiency, adds life
Cost is produced, loss is brought to industrial production.
Engineering ceramics as substituting because with lightweight, compression strength is high and a series of advantage such as high abrasion resistance, passing
The cast iron of system and manufacture stream ball pipe ideal material.But up to now untill, still without a kind of impeller head stream of function admirable
Ball pipe, therefore it is badly in need of a kind of compound impeller head stream ball pipe of function admirable.
The content of the invention
To overcome the defect and deficiency of existing cast iron impeller head stream ball pipe, it is simply fast that the present invention proposes a kind of technical process
The preparation method of compound impeller head stream ball pipe prompt, easy to operate and function admirable.
The present invention is achieved by the following technical solutions：
A kind of preparation method of compound impeller head stream ball pipe, step is as follows：
（1）Raw material is prepared：Weigh respectively in mass ratio 80 ~ 85 parts of alpha-silicon nitride powders, 5 ~ 10 parts of boron nitride nanometer pipe powder,
4 ~ 6 parts of alumina powder, 3 ~ 5 parts of yttrium oxide powder, constitute the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1
Ratio add alcohol solvent or diluent be made, be 9 ~ 15 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, to ball
Argon gas is passed through in grinding jar as protection gas, ball milling mixing is carried out to raw material in planetary ball mill, it is 200 to set rotational speed of ball-mill
~ 250 rpms, Ball-milling Time is 8 ~ 12 hours；Raw material after ball milling is dried 10 ~ 12 hours in vacuum drying chamber, if
Temperature is put for 75 DEG C ~ 85 DEG C；Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, and it is 28% ~ 35% to add mass fraction
Distilled water, and add mass fraction be 0.3% ~ 0.5% diluent, raw material is stirred under 250 ~ 300r/min rotating speed
Mix, mixing time is that slurry is made after 1 ~ 2 hour；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, slurry is waited
When layer thickens 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry；
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is 53
DEG C ± 3 DEG C, when mould grouting port separates 0.5 ~ 1mm with base substrate, you can made-up belt model is stripped, obtain stream ball pipe hair
Base；
（6）Vacuum-sintering：By step（5）Middle gained stream ball pipe blank is placed in stream ball pipe mold, and puts it into vacuum
Vacuum heating-press sintering is carried out in hot-pressed sintering furnace, vacuum is 10-2Pa, heating process is：200 DEG C are first heated to manually, then are pressed
10 DEG C/min programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to 1750 DEG C ~ 1800 by 7 DEG C/min speed
DEG C, terminate after insulation 1h, Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners；
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners under core as becoming a mandarin
In ball pipe casing sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall；Finally give outer
Side is cast iron, and inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
The features of the present invention also has：
The step（3）In diluent be waterglass or sodium carbonate or one kind or several in sodium phosphate or calgon
Plant combination；Described diluent is more preferably sodium carbonate.
The step（4）In carry out getting rid of slurry to outwelling the made-up belt model after slurry, be residual on a small quantity to avoid outwelling after slurry
Remaining slurry base substrate inner surface uneven distribution, to ensure that leftover slurry is evenly distributed, it is to avoid mud thread produce.
The step（5）In be the 2/5-3/5 that eats the slurry time to drying time of made-up belt model；Further preferably, to band
The drying time of mold type is eat the slurry time 1/2.
Beneficial effects of the present invention are：
Silicon nitride ceramics is as one of conventional high-strength wearable structural ceramics, with high intensity, high rigidity, high temperature resistant, resistance to
The advantages of abrasion, corrosion-resistant, anti-oxidant, good thermal shock, small density.Boron nitride nano-tube have good chemical stability,
Excellent mechanical property, heat conductivility, relatively low hot expansibility and excellent antioxygenic property, it is multiple with silicon nitride ceramic material
Close, the fragility of silicon nitride ceramics product can be reduced, improve crack growth resistance, as the preferable of manufacture impeller head stream ball pipe
Obdurability ceramic material.
（1）High rigidity.Heretofore described new Si3N4/ BNNT composite ceramic materials have high hardness, can
Up to HRA94, as the liner of impeller head stream ball pipe, the hardness of existing simple cast iron materials is substantially increased, in actual life
Produce more durable in use.
（2）Good wearability.Heretofore described new Si3N4/ BNNT composite ceramic materials have well resistance to
Performance is ground, average friction coefficient is up to 0.285, as the liner of impeller head stream ball pipe, substantially increases existing simple casting
The anti-wear performance of iron material, reduces the scrappage of stream ball pipe.
（3）It is simple to operate.Used equipment is the equipment commonly used in laboratory or enterprise's production in preparation, is operated
Journey is also simple and convenient, and preparation condition is easily realized.
In a word, preparation method simple and fast of the present invention, the new Si of preparation3N4/ BNNT composite ceramicses liner, cast iron
The impeller head stream ball pipe of overcoat has had the two-fold advantage of ceramics and cast iron concurrently, improves the hardness and wearability of stream ball pipe, mitigates
The weight of product, meets industrial requirement.
Embodiment
With reference to embodiment, the present invention is further illustrated, but the present invention is not limited thereto specific example.
Embodiment 1：
（1）Raw material is prepared：Weigh 80 parts of alpha-silicon nitride powders, 10 parts of boron nitride nanometer pipe powder, oxidation respectively in mass ratio
5 parts of aluminium powder, 5 parts of yttrium oxide powder, constitute the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1
Ratio adds alcohol and solvent or diluent is made, and is 10 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, to ball grinder
Argon gas is inside passed through as protection gas, ball milling mixing is carried out to raw material in planetary ball mill, it is 250 turns every to set rotational speed of ball-mill
Minute, Ball-milling Time is 10 hours.Raw material after ball milling is dried 10 hours in vacuum drying chamber, it is 75 DEG C to set temperature.
Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the steaming that mass fraction is 30%
Distilled water, and the waterglass that mass fraction is 0.3% is added, raw material is stirred under 250r/min rotating speed, mixing time is
Slurry is made after 1 hour；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, slurry is waited
When layer thickens 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry.
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is 53
DEG C ± 3 DEG C, when mould grouting port separates 1mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；It is right
The drying time of made-up belt model is eat the slurry time 3/5.
（6）Vacuum-sintering：By step（5）Middle gained blank is placed in stream ball pipe mold, and puts it into vacuum hotpressing burning
Vacuum heating-press sintering is carried out in freezing of a furnace, vacuum is 10-2Pa, heating process is：First be heated to 200 DEG C manually, then by 10 DEG C/
Min programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to burning after 1750 DEG C, insulation 1h by 7 DEG C/min speed
Knot terminates, and Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners.
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners under core as becoming a mandarin
In ball pipe casing sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall.Finally give outer
Side is cast iron, and inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
Embodiment 2：
（1）Raw material is prepared：Weigh 82 parts of alpha-silicon nitride powders, 8 parts of boron nitride nanometer pipe powder, aluminum oxide respectively in mass ratio
6 parts of powder, 4 parts of yttrium oxide powder, constitute the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1
Ratio adds alcohol and solvent or diluent is made, and is 9 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, to ball grinder
Argon gas is inside passed through as protection gas, ball milling mixing is carried out to raw material in planetary ball mill, it is 250 turns every to set rotational speed of ball-mill
Minute, Ball-milling Time is 8 hours.Raw material after ball milling is dried 12 hours in vacuum drying chamber, it is 85 DEG C to set temperature.Will
Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the steaming that mass fraction is 32%
Distilled water, and the sodium carbonate that mass fraction is 0.4% is added, raw material is stirred under 250r/min rotating speed, mixing time is
Slurry is made after 1.5 hours；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, slurry is waited
When layer thickens 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry.
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is 53
DEG C ± 3 DEG C, when mould grouting port separates 1mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；It is right
The drying time of made-up belt model is eat the slurry time 1/2.
（6）Vacuum-sintering：By step（5）Middle gained blank is placed in stream ball pipe mold, and puts it into vacuum hotpressing burning
Vacuum heating-press sintering is carried out in freezing of a furnace, vacuum is 10-2Pa, heating process is：First be heated to 200 DEG C manually, then by 10 DEG C/
Min programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to burning after 1780 DEG C, insulation 1h by 7 DEG C/min speed
Knot terminates, and Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners.
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners under core as becoming a mandarin
In ball pipe casing sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall.Finally give outer
Side is cast iron, and inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
Embodiment 3：
（1）Raw material is prepared：Weigh 85 parts of alpha-silicon nitride powders, 5 parts of boron nitride nanometer pipe powder, aluminum oxide respectively in mass ratio
4 parts of powder, 3 parts of yttrium oxide powder, constitute the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1
Ratio adds alcohol and solvent or diluent is made, and is 15 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, to ball grinder
Argon gas is inside passed through as protection gas, ball milling mixing is carried out to raw material in planetary ball mill, it is 200 turns every to set rotational speed of ball-mill
Minute, Ball-milling Time is 12 hours.Raw material after ball milling is dried 12 hours in vacuum drying chamber, it is 75 DEG C to set temperature.
Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the steaming that mass fraction is 35%
Distilled water, and add the combination of sodium phosphate and calgon that mass fraction is 0.5%, wherein sodium phosphate and calgon
Mass ratio is 1:1, raw material is stirred under 300r/min rotating speed, mixing time is that slurry is made after 1 hour；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, slurry is waited
When layer thickens 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry.
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is 53
DEG C ± 3 DEG C, when mould grouting port separates 0.5mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；
To drying time of made-up belt model be eat the slurry time 2/5.
（6）Vacuum-sintering：By step（5）Middle gained blank is placed in stream ball pipe mold, and puts it into vacuum hotpressing burning
Vacuum heating-press sintering is carried out in freezing of a furnace, vacuum is 10-2Pa, heating process is：First be heated to 200 DEG C manually, then by 10 DEG C/
Min programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to burning after 1800 DEG C, insulation 1h by 7 DEG C/min speed
Knot terminates, and Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners.
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners under core as becoming a mandarin
In ball pipe casing sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall.Finally give outer
Side is cast iron, and inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
Compound stream ball pipe performance prepared by three kinds of embodiments is compared with existing cast iron stream ball pipe such as table 1.
Table 1
As seen from the above table, compound stream ball pipe obtained by preparation method of the present invention is compared with existing cast iron stream ball pipe,
With higher hardness and lower density, this causes the weight of the compound stream ball pipe of same volume to be only cast iron stream ball Guan Chong
The half of amount, and hardness is close to 2 times of the latter.In terms of wearability, the wear rate of compound stream ball pipe of the present invention is remote
Less than the wear rate of cast iron type stream ball pipe under being acted in same load, illustrate the former wearability far superior to the latter, and in institute
State in three kinds of embodiments, the gained stream ball pipe performance of embodiment 2 is best, therefore preparation technology described in embodiment 2 is to prepare compound stream
The best practice of ball pipe.
In summary, the compound impeller head stream ball pipe prepared by method of the present invention, using water suction plaster mold
Forming technique, make use of Si3N4/ BNNT composite ceramicses intensity is high, wearability is good, light weight premium properties, adds and adopts at present
The hardness and wearability of single cast iron stream ball pipe, are reduced during long-term use because pellet flows in stream ball pipe
The wear extent of dynamic convection current ball pipe so that the scrappage of stream ball pipe is substantially reduced, and has been saved production cost, has been improved production efficiency,
It is a kind of excellent new impeller head stream ball pipe.
Claims (8)
1. a kind of preparation method of compound impeller head stream ball pipe, step is as follows：
（1）Raw material is prepared：Weigh 80 ~ 85 parts of alpha-silicon nitride powders, 5 ~ 10 parts of boron nitride nanometer pipe powder, oxidation respectively in mass ratio
4 ~ 6 parts of aluminium powder, 3 ~ 5 parts of yttrium oxide powder, constitute the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1 ratio
Example adds alcohol and solvent or diluent is made, and is 9 ~ 15 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, to ball grinder
Argon gas is inside passed through as protection gas, ball milling mixing is carried out to raw material in planetary ball mill, it is 200 ~ 250 to set rotational speed of ball-mill
Rpm, Ball-milling Time is 8 ~ 12 hours；Raw material after ball milling is dried 10 ~ 12 hours in vacuum drying chamber, temperature is set
Spend for 75 DEG C ~ 85 DEG C；Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the steaming that mass fraction is 28% ~ 35%
Distilled water, and the diluent that mass fraction is 0.3% ~ 0.5% is added, raw material is stirred under 250 ~ 300r/min rotating speed,
Mixing time is that slurry is made after 1 ~ 2 hour；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, pulp layer is waited to increase
When thickness arrives 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry；
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is at 53 DEG C ± 3
DEG C, when mould grouting port separates 0.5 ~ 1mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；
（6）Vacuum-sintering：By step（5）Middle gained stream ball pipe blank is placed in stream ball pipe mold, and puts it into vacuum hotpressing
Vacuum heating-press sintering is carried out in sintering furnace, vacuum is 10-2Pa, heating process is：First be heated to 200 DEG C manually, then by 10 DEG C/
Min programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to 1750 DEG C ~ 1800 DEG C, insulation by 7 DEG C/min speed
Terminate after 1h, Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners；
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners are used as the ball pipe that become a mandarin under core
Cast in sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall；Finally giving outside is
Cast iron, inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
2. the preparation method of compound impeller head stream ball pipe according to claim 1, it is characterised in that the step（3）
In diluent be the one or more combination in waterglass or sodium carbonate or sodium phosphate or calgon.
3. the preparation method of compound impeller head stream ball pipe according to claim 2, it is characterised in that the step（3）
In diluent be sodium carbonate.
4. the preparation method of compound impeller head stream ball pipe according to claim 1, it is characterised in that the step（5）
In be the 2/5-3/5 that eats the slurry time to drying time of made-up belt model.
5. the preparation method of compound impeller head stream ball pipe according to claim 4, it is characterised in that the step（5）
In to drying time of made-up belt model be eat the slurry time 1/2.
6. the preparation method of compound impeller head stream ball pipe according to claim 1, its detailed step is：（1）Raw material is matched somebody with somebody
System：Weigh 80 parts of alpha-silicon nitride powders, 10 parts of boron nitride nanometer pipe powder, 5 parts of alumina powder, oxidation yttrium powder respectively in mass ratio
5 parts of end, constitutes the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1 ratio
Add alcohol and solvent or diluent is made, be 10 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, and leads into ball grinder
Enter argon gas as protection gas, carry out ball milling mixing to raw material in planetary ball mill, setting rotational speed of ball-mill is 250 revolutions per minute
Clock, Ball-milling Time is 10 hours, and the raw material after ball milling is dried 10 hours in vacuum drying chamber, and it is 75 DEG C to set temperature, will
Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the distillation that mass fraction is 30%
Water, and the waterglass that mass fraction is 0.3% is added, raw material is stirred under 250r/min rotating speed, mixing time is 1
Slurry is made after hour；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, pulp layer is waited to increase
When thickness arrives 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry；
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is at 53 DEG C ± 3
DEG C, when mould grouting port separates 1mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；To band mold
The drying time of type is eat the slurry time 3/5；
（6）Vacuum-sintering：By step（5）Middle gained blank is placed in stream ball pipe mold, and puts it into vacuum sintering funace
Middle carry out vacuum heating-press sintering, vacuum is 10-2Pa, heating process is：First 200 DEG C are heated to manually, then by 10 DEG C/min's
Programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to sintering knot after 1750 DEG C, insulation 1h by 7 DEG C/min speed
Beam, Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners；
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners are used as the ball pipe that become a mandarin under core
Cast in sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall, finally giving outside is
Cast iron, inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
7. the preparation method of compound impeller head stream ball pipe according to claim 1, its detailed step is：（1）Raw material is matched somebody with somebody
System：Weigh 82 parts of alpha-silicon nitride powders, 8 parts of boron nitride nanometer pipe powder, 6 parts of alumina powder, oxidation yttrium powder respectively in mass ratio
4 parts of end, constitutes the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1 ratio
Add alcohol and solvent or diluent is made, be 9 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, and leads into ball grinder
Enter argon gas as protection gas, carry out ball milling mixing to raw material in planetary ball mill, setting rotational speed of ball-mill is 250 revolutions per minute
Clock, Ball-milling Time is 8 hours；Raw material after ball milling is dried 12 hours in vacuum drying chamber, it is 85 DEG C to set temperature；Will be dry
Mixed powder after dry is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the distillation that mass fraction is 32%
Water, and the sodium carbonate that mass fraction is 0.4% is added, raw material is stirred under 250r/min rotating speed, mixing time is
Slurry is made after 1.5 hours；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, pulp layer is waited to increase
When thickness arrives 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry；
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is at 53 DEG C ± 3
DEG C, when mould grouting port separates 1mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；To band mold
The drying time of type is eat the slurry time 1/2；
（6）Vacuum-sintering：By step（5）Middle gained blank is placed in stream ball pipe mold, and puts it into vacuum sintering funace
Middle carry out vacuum heating-press sintering, vacuum is 10-2Pa, heating process is：First 200 DEG C are heated to manually, then by 10 DEG C/min's
Programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to sintering knot after 1780 DEG C, insulation 1h by 7 DEG C/min speed
Beam, Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners；
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners are used as the ball pipe that become a mandarin under core
Cast in sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall, finally giving outside is
Cast iron, inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
8. the preparation method of compound impeller head stream ball pipe according to claim 1, its detailed step is：
（1）Raw material is prepared：Weigh 85 parts of alpha-silicon nitride powders, 5 parts of boron nitride nanometer pipe powder, alumina powder respectively in mass ratio
4 parts, 3 parts of yttrium oxide powder, constitute the raw material prepared；
（2）Raw material is mixed：By step（1）Described in raw material add in ball grinder, be 1 by alcohol and volume feed:1 ratio
Add alcohol and solvent or diluent is made, be 15 by steel ball and material quality ratio:1 adds steel ball, after ball grinder is sealed, and leads into ball grinder
Enter argon gas as protection gas, carry out ball milling mixing to raw material in planetary ball mill, setting rotational speed of ball-mill is 200 revolutions per minute
Clock, Ball-milling Time is 12 hours；Raw material after ball milling is dried 12 hours in vacuum drying chamber, it is 75 DEG C to set temperature；Will
Dried mixed powder is crossed after 300 mesh sieves and collects standby；
（3）Slurry preparation：By step（2）Middle gained mixed powder is added in mixer, adds the distillation that mass fraction is 35%
Water, and add the matter of the combination, wherein sodium phosphate and calgon of sodium phosphate and calgon that mass fraction is 0.5%
Amount is than being 1:1, raw material is stirred under 300r/min rotating speed, mixing time is that slurry is made after 1 hour；
（4）Injection forming：By step（3）In middle gained slurry injection impeller head stream ball pipe molding of gypsum mould, pulp layer is waited to increase
When thickness arrives 10mm, slurry unnecessary in mould is outwelled, and carry out getting rid of slurry to outwelling the made-up belt model after slurry；
（5）Dry the demoulding：By step（4）Middle gained made-up belt model is put into hothouse, and the temperature control of hothouse is at 53 DEG C ± 3
DEG C, when mould grouting port separates 0.5mm with base substrate, you can be stripped made-up belt model, obtain flowing ball pipe blank；To made-up belt
The drying time of model is eat the slurry time 2/5；
（6）Vacuum-sintering：By step（5）Middle gained blank is placed in stream ball pipe mold, and puts it into vacuum sintering funace
Middle carry out vacuum heating-press sintering, vacuum is 10-2Pa, heating process is：First 200 DEG C are heated to manually, then by 10 DEG C/min's
Programming rate is heated to 1100 DEG C, is incubated 30min, then be heated to sintering knot after 1800 DEG C, insulation 1h by 7 DEG C/min speed
Beam, Si is obtained after workpiece cools to room temperature with the furnace3N4/ BNNT composite ceramics stream ball pipe liners；
（7）Composite casting：By step（6）Middle gained Si3N4/ BNNT composite ceramics stream ball pipe liners are used as the ball pipe that become a mandarin under core
Cast in sandbox, poured into a mould after matched moulds with molten iron, iron castings is coated in ceramics stream ball pipe outer wall, finally giving outside is
Cast iron, inner side is Si3N4The compound impeller head stream ball pipe of/BNNT composite ceramicses.
Priority Applications (3)
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| CN201510876689.9A CN105538167B (en) | 2015-12-03 | 2015-12-03 | A kind of preparation method of compound impeller head stream ball pipe |
| PCT/CN2015/096787 WO2017092064A1 (en) | 2015-12-03 | 2015-12-09 | Method for preparing shot flowing pipe of composite shot blasting machine |
| EP15909578.5A EP3225359B1 (en) | 2015-12-03 | 2015-12-09 | Method for preparing shot flowing pipe of composite shot blasting machine |
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| CN201510876689.9A CN105538167B (en) | 2015-12-03 | 2015-12-03 | A kind of preparation method of compound impeller head stream ball pipe |
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| EP3225359A1 (en) | 2017-10-04 |
| EP3225359B1 (en) | 2019-01-09 |
| CN105538167A (en) | 2016-05-04 |
| EP3225359A4 (en) | 2018-04-04 |
| WO2017092064A1 (en) | 2017-06-08 |
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