CN107745082A - A kind of hot pressing note ceramic core and preparation method thereof - Google Patents
A kind of hot pressing note ceramic core and preparation method thereof Download PDFInfo
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- CN107745082A CN107745082A CN201710777477.4A CN201710777477A CN107745082A CN 107745082 A CN107745082 A CN 107745082A CN 201710777477 A CN201710777477 A CN 201710777477A CN 107745082 A CN107745082 A CN 107745082A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/101—Permanent cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/025—Hot pressing, e.g. of ceramic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a kind of hot pressing note ceramic core, by following weight than material be made：The quartz glass of 85 parts by weight, the mineralizer of 8 parts by weight, the surfactant of the plasticizer of 5 parts by weight and 2 parts by weight, wherein, the grain size proportion of quartz glass powder is as follows：Mixed powder and the fine powder mixing of equal weight part, plasticizer are mixed by following material：The paraffin of 48 parts by weight, the beeswax of 7 parts by weight, the stearic acid of the rosin of 38 parts by weight and 7 parts by weight.Hot pressing note ceramic core in the present invention, using coarse powder and the quartz glass of fine powder equivalent volumes mixing match, and the plasticizer materials being newly formulated, the matrix material of ceramic core is formed, there is the advantages of hardness is high, stability is strong compared to existing siliceous ceramic core；Core base substrate is heated to 1,100 1300 DEG C, and does intensive treatment, improves the high-temperature stability of ceramic core, and deformation coefficient is low, is unlikely to deform, and intensity height is not easy to lose.
Description
Technical field
The present invention relates to Investment casting technology field, specifically a kind of hot pressing note ceramic core and preparation method thereof.
Background technology
Metal casting is through cooled and solidified, to level Metal Melting into meeting necessarily required liquid and pouring enter in casting mold
The technical process of the casting of predetermined shape, size and performance is obtained after processing.Blank is cast because of almost shaping, and reaches and exempts from machine
It is modern mechanical system that tool processing or the purpose processed on a small quantity, which reduce cost and reduce the metal casting of time to a certain extent,
Make one of fundamental technology of industry.
Ceramic core is a kind of abbreviation of the ceramic core used in full form casting process, as turn for forming casting cavity
Junctor, its effect are：The inner-cavity structure of casting is formed, will to the dimensional accuracy of cavity with outer mould and formwork common guarantee casting
Ask.Ceramic core is typically formed complex-shaped or is not easy the die cavity of casting shaped, as simplify technology difficulty reduce into
A kind of special process meanses of this raising job efficiency.
With model casting to it is more complicated, more accurate, maximization direction develop, investment casting cores it is also proposed with
When the requirement all entered, the core that development refractoriness is higher, dimensionally stable, intensity are good turns into matter of utmost importance.
The content of the invention
It is an object of the invention to provide a kind of hot pressing note ceramic core and preparation method thereof, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides following technical scheme：
Ceramic core is noted in a kind of hot pressing, by following weight than material be made：The ore deposit of the quartz glass of 85 parts by weight, 8 parts by weight
The surfactant of agent, the plasticizer of 5 parts by weight and 2 parts by weight,
Wherein, the grain size proportion of quartz glass powder is as follows：Mixed powder and the fine powder mixing of equal weight part, wherein mixed powder bag
Including 140-200 powder, 200-270 powder and more than No. 270 powder, three's weight ratio is：1:2:1；
Plasticizer is mixed by following material：The paraffin of 48 parts by weight, the beeswax of 7 parts by weight, the rosin of 38 parts by weight and 7 weights
Measure the stearic acid of part.
As the further scheme of the present invention：The mineralizer includes Al2O3, CaO and SO2, and three's weight ratio is respectively；
14.7th, 23.24 and 62.07 parts by weight.
As the further scheme of the present invention：The surfactant is preferably oleic acid.
A kind of preparation method of hot pressing note ceramic core, comprises the following steps：
S1, slurry are prepared, comprised the following steps：
S11, quartz powder and mineralizer are placed in ball mill and mixed at least 2 hours, take out drying, and be less than moisture
Mass fraction 0.5%；
S12, plasticizer is added in the stainless steel agitator tank of belt stirrer, is heated to 85 degree or so, and under agitation
Plasticizer powder and surfactant are added, continues stirring at least 5 hours, it is standby to pour into ingot bar；
S2, shaping, using pressure sintering by ingot bar die cast；
S3, fill alms bowl and fill filler, compressing core base substrate embedment is filled in the alms bowl of filler, is placed into amplitude 0.2-
0.5mm vibration bench moulding；
S4, roasting, base substrate is put into roaster and heated, is slowly warming up to 600 DEG C, and at least 3 hours heating-up time, now base
This completion de-waxing, continue to be heated to more than 900 DEG C, be preferred with 1100-1300 DEG C, be incubated 3-4 hours, furnace cooling；
S5, intensive treatment, roasting core will be penetrated into dissolved with the solution of thermosetting resin and curing agent, be in cured processing
Core strength can be strengthened.
As the further scheme of the present invention：The processing method of the mineralizer is：Cab-O-sil, calcium carbonate and industrial oxygen
Change mix grinding in aluminium loading ball mill porcelain jar after 24 hours, to be calcined under the conditions of 1100 DEG C, crush after cooling, cross No. 260 sieves.
As the further scheme of the present invention：In step S2, hot pressing parameterses are：Pressure Casting 2.7-4.2MPa, pressure
It is higher than plasticizer fusing point 30-50 DEG C to note temperature, dwell time 15-30s.
As the further scheme of the present invention：In step S2, before hot press operation, die mould is preheating to 40-50 DEG C.
As the further scheme of the present invention：The filler is preferably that 4-6 hours baked work is incubated at 1300 DEG C
Industry aluminum oxide.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the hot pressing note ceramic core in the present invention, using coarse powder and the quartz glass of fine powder equivalent volumes mixing match, and
The plasticizer materials being newly formulated, the matrix material of ceramic core is formed, have hardness high, steady compared to existing siliceous ceramic core
The advantages of qualitative strong；
2nd, core base substrate is heated to 1100-1300 DEG C, and does intensive treatment, improves the high-temperature stability of ceramic core, deformation
Coefficient is low, is unlikely to deform, and intensity height is not easy to lose.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
In the embodiment of the present invention, ceramic core is noted in a kind of hot pressing, by following weight than material be made：The stone of 85 parts by weight
English glass, the mineralizer of 8 parts by weight, the surfactant of the plasticizer of 5 parts by weight and 2 parts by weight,
Wherein, the grain size proportion of quartz glass powder is as follows：Mixed powder and the fine powder mixing of equal weight part, wherein mixed powder bag
140-200 powder, 200-270 powder and 270-300 powder are included, three's weight ratio is：1:2:1；
Plasticizer is mixed by following material：The paraffin of 48 parts by weight, the beeswax of 7 parts by weight, the rosin of 38 parts by weight and 7 weights
Measure the stearic acid of part.
The mineralizer includes Al2O3, CaO and SO2, and three's weight ratio is respectively；14.7th, 23.24 and 62.07 weight
Part.
The surfactant is preferably oleic acid.
A kind of preparation method of hot pressing note ceramic core, comprises the following steps：
S1, slurry are prepared, comprised the following steps：
S11, quartz powder and mineralizer are placed in ball mill and mixed at least 2 hours, take out drying, and be less than moisture
Mass fraction 0.5%；
S12, plasticizer is added in the stainless steel agitator tank of belt stirrer, is heated to 85 degree or so, and under agitation
Plasticizer powder and surfactant are added, continues stirring at least 5 hours, it is standby to pour into ingot bar；
S2, shaping, using pressure sintering by ingot bar die cast；
S3, fill alms bowl and fill filler, compressing core base substrate embedment is filled in the alms bowl of filler, is placed into amplitude 0.2-
0.5mm vibration bench moulding；
S4, roasting, base substrate is put into roaster and heated, is slowly warming up to 600 DEG C, and at least 3 hours heating-up time, now base
This completion de-waxing, continue to be heated to more than 900 DEG C, be preferred with 1100-1300 DEG C, be incubated 3-4 hours, furnace cooling；
S5, intensive treatment, roasting core will be penetrated into dissolved with the solution of thermosetting resin and curing agent, be in cured processing
Core strength can be strengthened.
The processing method of the mineralizer is：Cab-O-sil, calcium carbonate and commercial alumina are loaded in ball mill porcelain jar and mixed
Mill is calcined after 24 hours under the conditions of 1100 DEG C, is crushed after cooling, crosses No. 260 sieves.
In step S2, hot pressing parameterses are：Pressure Casting 2.7-4.2MPa, pressure injection temperature are higher 30- than plasticizer fusing point
50 DEG C, dwell time 15-30s.
In step S2, before hot press operation, die mould is preheating to 40-50 DEG C, reduces core blank deformation probability.
The filler is preferably that 4-6 hours baked commercial alumina is incubated at 1300 DEG C.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any mark in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (8)
1. ceramic core is noted in a kind of hot pressing, it is characterised in that：By following weight than material be made：The quartzy glass of 85 parts by weight
Glass, the mineralizer of 8 parts by weight, the surfactant of the plasticizer of 5 parts by weight and 2 parts by weight,
Wherein, the grain size proportion of quartz glass powder is as follows：Mixed powder and the fine powder mixing of equal weight part, wherein mixed powder bag
Including 140-200 powder, 200-270 powder and more than No. 270 powder, three's weight ratio is：1:2:1；
Plasticizer is mixed by following material：The paraffin of 48 parts by weight, the beeswax of 7 parts by weight, the rosin of 38 parts by weight and 7 weights
Measure the stearic acid of part.
A kind of 2. hot pressing note ceramic core according to claim 1, it is characterised in that：The mineralizer include Al2O3,
CaO and SO2, three's weight ratio are respectively；14.7th, 23.24 and 62.07 parts by weight.
A kind of 3. hot pressing note ceramic core according to claim 1, it is characterised in that：The surfactant is preferably oil
Acid.
4. the preparation method of ceramic core is noted according to a kind of any described hot pressing of claim 1-3, it is characterised in that：Including with
Lower step：
S1, slurry are prepared, comprised the following steps：
S11, quartz powder and mineralizer are placed in ball mill and mixed at least 2 hours, take out drying, and be less than moisture
Mass fraction 0.5%；
S12, plasticizer is added in the stainless steel agitator tank of belt stirrer, is heated to 85 degree or so, and under agitation
Plasticizer powder and surfactant are added, continues stirring at least 5 hours, it is standby to pour into ingot bar；
S2, shaping, using pressure sintering by ingot bar die cast；
S3, fill alms bowl and fill filler, compressing core base substrate embedment is filled in the alms bowl of filler, is placed into amplitude 0.2-
0.5mm vibration bench moulding；
S4, roasting, base substrate is put into roaster and heated, is slowly warming up to 600 DEG C, and at least 3 hours heating-up time, now base
This completion de-waxing, continue to be heated to more than 900 DEG C, be preferred with 1100-1300 DEG C, be incubated 3-4 hours, furnace cooling；
S5, intensive treatment, roasting core will be penetrated into dissolved with the solution of thermosetting resin and curing agent, be in cured processing
Core strength can be strengthened.
A kind of 5. preparation method of hot pressing note ceramic core according to claim 4, it is characterised in that：The mineralizer
Processing method is：After mix grinding in Cab-O-sil, calcium carbonate and commercial alumina loading ball mill porcelain jar 24 hours, in 1100 DEG C of bars
It is calcined under part, is crushed after cooling, crosses No. 260 sieves.
A kind of 6. preparation method of hot pressing note ceramic core according to claim 4, it is characterised in that：In step S2, heat
Pressure technological parameter be：Pressure Casting 2.7-4.2MPa, pressure injection temperature is higher than plasticizer fusing point 30-50 DEG C, dwell time 15-30s.
A kind of 7. preparation method of hot pressing note ceramic core according to claim 6, it is characterised in that：In step S2,
Before hot press operation, die mould is preheating to 40-50 DEG C.
A kind of 8. preparation method of hot pressing note ceramic core according to claim 4, it is characterised in that：The filler is preferred
To be incubated 4-6 hours baked commercial alumina at 1300 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710777477.4A CN107745082A (en) | 2017-09-01 | 2017-09-01 | A kind of hot pressing note ceramic core and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710777477.4A CN107745082A (en) | 2017-09-01 | 2017-09-01 | A kind of hot pressing note ceramic core and preparation method thereof |
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| CN107745082A true CN107745082A (en) | 2018-03-02 |
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ID=61255175
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992674A (en) * | 2020-07-30 | 2020-11-27 | 东营诚扬精密机械有限公司 | Preparation process of high-strength, high-toughness and easy-removal composite ceramic core for light alloy casting |
| CN112250473A (en) * | 2020-10-20 | 2021-01-22 | 西安工程大学 | Gradient porous ceramic core and preparation method thereof |
| CN112794706A (en) * | 2021-02-05 | 2021-05-14 | 佛山陶者陶瓷技术有限公司 | High-strength ceramic plate and preparation method thereof |
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2017
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992674A (en) * | 2020-07-30 | 2020-11-27 | 东营诚扬精密机械有限公司 | Preparation process of high-strength, high-toughness and easy-removal composite ceramic core for light alloy casting |
| CN112250473A (en) * | 2020-10-20 | 2021-01-22 | 西安工程大学 | Gradient porous ceramic core and preparation method thereof |
| CN112794706A (en) * | 2021-02-05 | 2021-05-14 | 佛山陶者陶瓷技术有限公司 | High-strength ceramic plate and preparation method thereof |
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Application publication date: 20180302 |