CN105538167A - Preparation method of shot flowing pipe of composite shot blasting machine - Google Patents
Preparation method of shot flowing pipe of composite shot blasting machine Download PDFInfo
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- CN105538167A CN105538167A CN201510876689.9A CN201510876689A CN105538167A CN 105538167 A CN105538167 A CN 105538167A CN 201510876689 A CN201510876689 A CN 201510876689A CN 105538167 A CN105538167 A CN 105538167A
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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 invention relates to the technical field of preparation of a shot flowing pipe of a shot blasting machine, and specifically discloses a preparation method of a shot flowing pipe of a shot blasting machine. The shot flowing pipe is composed of the following raw materials in parts by weight: 80 to 85 parts of silicon nitride powder, 5 to 10 parts of boron nitride nanotube powder, 4 to 6 parts of alumina powder, and 3 to 5 parts of yttrium oxide powder. The preparation method using the materials mentioned above to prepare a shot flow pipe comprises the following steps: preparing raw materials, mixing raw materials, preparing slurry, performing slip casting, drying, demoulding, carrying out vacuum sintering, and performing composite casting. The preparation materials have excellent mechanical and friction properties, thus the prepared shot flowing pipe has high hardness and an excellent wear resistant property; and the preparation method has the advantages of simple technical process, simple and convenient operation, and suitability for industrial production.
Description
Technical field
The present invention relates to the technical field that the control of impeller head stream ball is standby, specifically a kind of preparation method of compound impeller head stream ball pipe.
Background technology
Along with the development of industry, in technical field of surface, ball blast technology is applied very extensive in current industrial production, and the equipment used by ball blast technology is shot-blasting machine.Shot-blasting machine to be dished out at a high speed by steel sand shot a kind for the treatment of technology impacted on objects of material surface by impeller head, for removing burr and the iron rust of surface of the work, also can for the pollutant on the surface removal surface of certain partial coating of workpiece, and the surface profile adhesive force increasing coating is provided, reach the object of strengthening workpiece.Compare other process for treating surface, it has faster, more effective feature.
Parts most crucial in shot-blasting machine are impeller head, and during shot-blasting machine work, shot steel sand enters in impeller head by flowing ball pipe, blade is reached by orienting cover window through rotating after shot wheel accelerates, dish out under centrifugal action, get on surface of the work, to reach the object of cleaning or strengthening.
In actual industrial production, because bullet constantly flows in impeller head, this just proposes very high requirement to the wearability of impeller head, and the stream ball pipe of impeller head is the parts be the most easily worn, so improve the wearability of impeller head stream ball pipe, become the key technology reducing impeller head scrappage.
Stream ball pipe used in current industrial production is that cast iron materials is made, in long-term use, due to the continuous flow at high speed of shot steel sand, make it very easily be worn, and impeller head is scrapped, greatly reduce industrial production efficiency, add production cost, bring loss to industrial production.
Engineering ceramics because of have lightweight, compression strength is high and a series of advantage such as high abrasion resistance, become alternative traditional cast iron and manufacture the ideal material of stream ball pipe.But up to now, still there is no a kind of impeller head stream ball pipe of function admirable, be therefore badly in need of a kind of compound impeller head stream ball pipe of function admirable.
Summary of the invention
For overcoming defect and the deficiency of existing cast iron impeller head stream ball pipe, the present invention proposes a kind of technical process simple and fast, the easy to operate and preparation method of the compound impeller head stream ball pipe of function admirable.
The present invention is achieved by the following technical solutions:
A preparation method for compound impeller head stream ball pipe, step is as follows:
(1) raw material preparation: take alpha-silicon nitride powders 80 ~ 85 parts, boron nitride nanometer pipe powder 5 ~ 10 parts, alumina powder 4 ~ 6 parts, yttrium oxide powder 3 ~ 5 parts respectively by quality, the raw material of composition preparation;
(2) raw material mixing: raw material described in step (1) are added in ball grinder, the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent, be that 9 ~ 15:1 adds steel ball by steel ball and material quality ratio, after ball grinder is sealed, argon gas is passed into as protection gas in ball grinder, in planetary ball mill, carry out ball milling mixing to raw material, arranging rotational speed of ball-mill is 200 ~ 250 rpms, and Ball-milling Time is 8 ~ 12 hours; By the raw material after ball milling in vacuum drying chamber dry 10 ~ 12 hours, set temperature was 75 DEG C ~ 85 DEG C; Collect for subsequent use after dried mixed powder is crossed 300 mesh sieves;
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 28% ~ 35%, and add the diluent that mass fraction is 0.3% ~ 0.5%, stir raw material under the rotating speed of 250 ~ 300r/min, mixing time is make slurry after 1 ~ 2 hour;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting pulp layer to thicken 10mm, outwell slurry unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after slurry;
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 0.5 ~ 1mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank;
(6) vacuum-sintering: gained stream ball pipe blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, again by the heating rate to 1750 DEG C ~ 1800 DEG C of 7 DEG C/min, after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner;
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, makes iron castings be coated on pottery stream ball pipe outer wall; Finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
Feature of the present invention also has:
Diluent in described step (3) is the one or more combination in waterglass or sodium carbonate or sodium phosphate or calgon; Described diluent more preferably sodium carbonate.
Getting rid of slurry to outwelling the made-up belt model after mud in described step (4), being for a small amount of remaining mud after avoiding outwelling mud is in the uneven distribution of base substrate inner surface, to ensure that residual mud is evenly distributed, avoiding mud thread to produce.
Be the 2/5-3/5 eating the slurry time to the drying time of made-up belt model in described step (5); Further preferably, be eat the slurry time 1/2 to the drying time of made-up belt model.
Beneficial effect of the present invention is:
Silicon nitride ceramics as one of conventional high-strength wearable structural ceramics, the advantage such as there is high strength, high rigidity, high temperature resistant, wear-resistant, corrosion-resistant, anti-oxidant, good thermal shock, density are little.Boron nitride nano-tube has good chemical stability, excellent mechanical property, heat conductivility, lower hot expansibility and excellent antioxygenic property, with silicon nitride ceramic material compound, the fragility of silicon nitride ceramics product can be reduced, improve crack growth resistance, become the desirable obdurability ceramic material manufacturing impeller head stream ball pipe.
(1) high rigidity.Novel Si described in the present invention
3n
4/ BNNT composite ceramic material has high hardness, can reach HRA94, it can be used as the liner of impeller head stream ball pipe, substantially increases the hardness of existing simple cast iron materials, more durable in actual production uses.
(2) good wearability.Novel Si described in the present invention
3n
4/ BNNT composite ceramic material has good anti-wear performance, and average friction coefficient can reach 0.285, it can be used as the liner of impeller head stream ball pipe, substantially increases the anti-wear performance of existing simple cast iron materials, reduces the scrappage of stream ball pipe.
(3) simple to operate.Equipment used in preparation is equipment conventional in laboratory or enterprise's production, and operating process is also simple and convenient, and preparation condition easily realizes.
In a word, preparation method's simple and fast of the present invention, the New Si of preparation
3n
4the impeller head stream ball pipe of/BNNT composite ceramics liner, cast iron overcoat has had the two-fold advantage of pottery with cast iron concurrently, improves hardness and the wearability of stream ball pipe, alleviates the weight of product, meet industrial requirement.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but the present invention is not limited to this specific example.
embodiment 1:
(1) raw material preparation: take alpha-silicon nitride powders 80 parts, boron nitride nanometer pipe powder 10 parts, alumina powder 5 parts, yttrium oxide powder 5 parts in mass ratio respectively, the raw material of composition preparation;
(2) raw material mixing: powder described in step (1) is added in ball grinder; the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent; steel ball is added than for 10:1 by steel ball and material quality; after ball grinder is sealed; argon gas is passed into as protection gas in ball grinder; in planetary ball mill, carry out ball milling mixing to raw material, arranging rotational speed of ball-mill is 250 rpms, and Ball-milling Time is 10 hours.By the raw material after ball milling in vacuum drying chamber dry 10 hours, set temperature was 75 DEG C.Collect for subsequent use after dried mixed powder is crossed 300 mesh sieves;
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 30%, and add the waterglass that mass fraction is 0.3%, stir raw material under the rotating speed of 250r/min, mixing time is make slurry after 1 hour;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting mud layer to thicken 10mm, outwell mud unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after mud.
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 1mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank; Be eat the slurry time 3/5 to the drying time of made-up belt model.
(6) vacuum-sintering: gained blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, then presses the heating rate to 1750 DEG C of 7 DEG C/min, and after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner.
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, and iron castings is coated on pottery stream ball pipe outer wall.Finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
embodiment 2:
(1) raw material preparation: take alpha-silicon nitride powders 82 parts, boron nitride nanometer pipe powder 8 parts, alumina powder 6 parts, yttrium oxide powder 4 parts in mass ratio respectively, the raw material of composition preparation;
(2) raw material mixing: powder described in step (1) is added in ball grinder; the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent; steel ball is added than for 9:1 by steel ball and material quality; after ball grinder is sealed; argon gas is passed into as protection gas in ball grinder; in planetary ball mill, carry out ball milling mixing to raw material, arranging rotational speed of ball-mill is 250 rpms, and Ball-milling Time is 8 hours.By the raw material after ball milling in vacuum drying chamber dry 12 hours, set temperature was 85 DEG C.Collect for subsequent use after dried mixed powder is crossed 300 mesh sieves;
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 32%, and add the sodium carbonate that mass fraction is 0.4%, stir raw material under the rotating speed of 250r/min, mixing time is make slurry after 1.5 hours;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting mud layer to thicken 10mm, outwell mud unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after mud.
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 1mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank; Be eat the slurry time 1/2 to the drying time of made-up belt model.
(6) vacuum-sintering: gained blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, then presses the heating rate to 1780 DEG C of 7 DEG C/min, and after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner.
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, and iron castings is coated on pottery stream ball pipe outer wall.Finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
embodiment 3:
(1) raw material preparation: take alpha-silicon nitride powders 85 parts, boron nitride nanometer pipe powder 5 parts, alumina powder 4 parts, yttrium oxide powder 3 parts in mass ratio respectively, the raw material of composition preparation;
(2) raw material mixing: powder described in step (1) is added in ball grinder; the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent; steel ball is added than for 15:1 by steel ball and material quality; after ball grinder is sealed; argon gas is passed into as protection gas in ball grinder; in planetary ball mill, carry out ball milling mixing to raw material, arranging rotational speed of ball-mill is 200 rpms, and Ball-milling Time is 12 hours.By the raw material after ball milling in vacuum drying chamber dry 12 hours, set temperature was 75 DEG C.Collect for subsequent use after dried mixed powder is crossed 300 mesh sieves;
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 35%, and to add mass fraction be the sodium phosphate of 0.5% and the combination of calgon, wherein the mass ratio of sodium phosphate and calgon is 1:1, stir raw material under the rotating speed of 300r/min, mixing time is make slurry after 1 hour;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting mud layer to thicken 10mm, outwell mud unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after mud.
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 0.5mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank; Be eat the slurry time 2/5 to the drying time of made-up belt model.
(6) vacuum-sintering: gained blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, then presses the heating rate to 1800 DEG C of 7 DEG C/min, and after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner.
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, and iron castings is coated on pottery stream ball pipe outer wall.Finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
Compound stream ball pipe performance prepared by described three kinds of embodiments compared with existing cast iron stream ball pipe as table 1.
Table 1
As seen from the above table, preparation method's gained of the present invention compound stream ball pipe is compared with existing cast iron stream ball pipe, have higher hardness and lower density, this makes the weight of the compound stream ball pipe of same volume be only the half of cast iron stream ball pipe weight, and hardness is close to 2 times of the latter.In wearability, the wear rate of compound stream ball pipe of the present invention is far below the wear rate of cast iron type stream ball pipe under same load effect, illustrate that the former wearability is far superior to the latter, and in described three kinds of embodiments, embodiment 2 gained stream ball pipe performance is best, therefore preparation technology described in embodiment 2 prepares the best practice of compound stream ball pipe.
In sum, the compound impeller head stream ball pipe prepared by method of the present invention, is adopted water suction gypsum contour forming technology, make use of Si
3n
4the premium properties that/BNNT composite ceramics intensity is high, wearability good, quality is light, add hardness and the wearability of the single cast iron stream ball pipe adopted at present, reduce in long-term use procedure because ball material is in the wear extent of stream ball Bottomhole pressure convection current ball pipe, the scrappage flowing ball pipe is reduced greatly, save production cost, improve production efficiency, is a kind of excellent novel impeller head stream ball pipe.
Claims (8)
1. a preparation method for compound impeller head stream ball pipe, step is as follows:
(1) raw material preparation: take alpha-silicon nitride powders 80 ~ 85 parts, boron nitride nanometer pipe powder 5 ~ 10 parts, alumina powder 4 ~ 6 parts, yttrium oxide powder 3 ~ 5 parts respectively by quality, the raw material of composition preparation;
(2) raw material mixing: raw material described in step (1) are added in ball grinder, the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent, be that 9 ~ 15:1 adds steel ball by steel ball and material quality ratio, after ball grinder is sealed, argon gas is passed into as protection gas in ball grinder, in planetary ball mill, carry out ball milling mixing to raw material, arranging rotational speed of ball-mill is 200 ~ 250 rpms, and Ball-milling Time is 8 ~ 12 hours; By the raw material after ball milling in vacuum drying chamber dry 10 ~ 12 hours, set temperature was 75 DEG C ~ 85 DEG C; Collect for subsequent use after dried mixed powder is crossed 300 mesh sieves;
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 28% ~ 35%, and add the diluent that mass fraction is 0.3% ~ 0.5%, stir raw material under the rotating speed of 250 ~ 300r/min, mixing time is make slurry after 1 ~ 2 hour;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting pulp layer to thicken 10mm, outwell slurry unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after slurry;
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 0.5 ~ 1mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank;
(6) vacuum-sintering: gained stream ball pipe blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, again by the heating rate to 1750 DEG C ~ 1800 DEG C of 7 DEG C/min, after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner;
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, makes iron castings be coated on pottery stream ball pipe outer wall; Finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
2. the preparation method of compound impeller head stream ball pipe according to claim 1, is characterized in that, the diluent in described step (3) is 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 characterized in that, the diluent in described step (3) is sodium carbonate.
4. the preparation method of compound impeller head stream ball pipe according to claim 1, is characterized in that, is the 2/5-3/5 eating the slurry time to the drying time of made-up belt model in described step (5).
5. the preparation method of compound impeller head stream ball pipe according to claim 4, is characterized in that, is eat the slurry time 1/2 to the drying time of made-up belt model in described step (5).
6. the preparation method of compound impeller head stream ball pipe according to claim 1, its detailed step is: (1) raw material is prepared: take alpha-silicon nitride powders 80 parts, boron nitride nanometer pipe powder 10 parts, alumina powder 5 parts, yttrium oxide powder 5 parts in mass ratio respectively, the raw material of composition preparation;
(2) raw material mixing: powder described in step (1) is added in ball grinder, the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent, steel ball is added than for 10:1 by steel ball and material quality, after ball grinder is sealed, argon gas is passed into as protection gas in ball grinder, in planetary ball mill, ball milling mixing is carried out to raw material, arranging rotational speed of ball-mill is 250 rpms, Ball-milling Time is 10 hours, by the raw material after ball milling in vacuum drying chamber dry 10 hours, set temperature is 75 DEG C, collect for subsequent use after dried mixed powder is crossed 300 mesh sieves,
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 30%, and add the waterglass that mass fraction is 0.3%, stir raw material under the rotating speed of 250r/min, mixing time is make slurry after 1 hour;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting mud layer to thicken 10mm, outwell mud unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after mud;
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 1mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank; Be eat the slurry time 3/5 to the drying time of made-up belt model;
(6) vacuum-sintering: gained blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, then presses the heating rate to 1750 DEG C of 7 DEG C/min, and after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner;
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, and iron castings is coated on pottery stream ball pipe outer wall, and finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
7. the preparation method of compound impeller head stream ball pipe according to claim 1, its detailed step is: (1) raw material is prepared: take alpha-silicon nitride powders 82 parts, boron nitride nanometer pipe powder 8 parts, alumina powder 6 parts, yttrium oxide powder 4 parts in mass ratio respectively, the raw material of composition preparation;
(2) raw material mixing: powder described in step (1) is added in ball grinder, the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent, steel ball is added than for 9:1 by steel ball and material quality, after ball grinder is sealed, argon gas is passed into as protection gas in ball grinder, in planetary ball mill, ball milling mixing is carried out to raw material, arranging rotational speed of ball-mill is 250 rpms, Ball-milling Time is 8 hours, by the raw material after ball milling in vacuum drying chamber dry 12 hours, set temperature is 85 DEG C, collect for subsequent use after dried mixed powder is crossed 300 mesh sieves,
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 32%, and add the sodium carbonate that mass fraction is 0.4%, stir raw material under the rotating speed of 250r/min, mixing time is make slurry after 1.5 hours;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting mud layer to thicken 10mm, outwell mud unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after mud;
(5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 1mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank; Be eat the slurry time 1/2 to the drying time of made-up belt model;
(6) vacuum-sintering: gained blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, then presses the heating rate to 1780 DEG C of 7 DEG C/min, and after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner;
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, makes iron castings be coated on pottery stream ball pipe outer wall; Finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
8. the preparation method of compound impeller head stream ball pipe according to claim 1, its detailed step is:
(1) raw material preparation: take alpha-silicon nitride powders 85 parts, boron nitride nanometer pipe powder 5 parts, alumina powder 4 parts, yttrium oxide powder 3 parts in mass ratio respectively, the raw material of composition preparation;
(2) raw material mixing: powder described in step (1) is added in ball grinder, the ratio being 1:1 in alcohol and volume feed adds alcohol and makes solvent or diluent, steel ball is added than for 15:1 by steel ball and material quality, after ball grinder is sealed, argon gas is passed into as protection gas in ball grinder, in planetary ball mill, ball milling mixing is carried out to raw material, arranging rotational speed of ball-mill is 200 rpms, Ball-milling Time is 12 hours, by the raw material after ball milling in vacuum drying chamber dry 12 hours, set temperature is 75 DEG C, collect for subsequent use after dried mixed powder is crossed 300 mesh sieves,
(3) slurry preparation: gained mixed powder in step (2) is added in mixer, add the distilled water that mass fraction is 35%, and to add mass fraction be the sodium phosphate of 0.5% and the combination of calgon, wherein the mass ratio of sodium phosphate and calgon is 1:1, stir raw material under the rotating speed of 300r/min, mixing time is make slurry after 1 hour;
(4) injection forming: gained slurry in step (3) is injected impeller head stream ball pipe molding of gypsum mould, when waiting mud layer to thicken 10mm, outwell mud unnecessary in mould, and get rid of slurry to outwelling the made-up belt model after mud; (5) the dry demoulding: resulting tape mold type in step (4) is put into hothouse, and the temperature of hothouse controls at 53 DEG C ± 3 DEG C, when mould grouting port is separated 0.5mm with base substrate, can carry out the demoulding to made-up belt model, obtains stream ball pipe blank; Be eat the slurry time 2/5 to the drying time of made-up belt model;
(6) vacuum-sintering: gained blank in step (5) is placed in stream ball pipe mold, and put it in vacuum sintering funace and carry out vacuum heating-press sintering, vacuum is 10
-2pa, heating process is: be first manually heated to 200 DEG C, then be heated to 1100 DEG C by the programming rate of 10 DEG C/min, insulation 30min, then presses the heating rate to 1800 DEG C of 7 DEG C/min, and after insulation 1h, sintering terminates, and cools to the furnace after room temperature obtain Si until workpiece
3n
4/ BNNT composite ceramics stream ball pipe liner;
(7) composite casting: by gained Si in step (6)
3n
4/ BNNT composite ceramics stream ball pipe liner, as becoming a mandarin under core in ball pipe casing sandbox, is poured into a mould with molten iron after matched moulds, and iron castings is coated on pottery stream ball pipe outer wall, and finally obtain outside for cast iron, inner side is Si
3n
4the compound impeller head stream ball pipe of/BNNT composite ceramics.
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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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| EP3225359A1 (en) | 2017-10-04 |
| WO2017092064A1 (en) | 2017-06-08 |
| CN105538167B (en) | 2017-09-26 |
| EP3225359A4 (en) | 2018-04-04 |
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