CN106904990A - A kind of high porosity Water-soluble ceramic core and preparation method thereof - Google Patents

A kind of high porosity Water-soluble ceramic core and preparation method thereof Download PDF

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Publication number
CN106904990A
CN106904990A CN201710181170.8A CN201710181170A CN106904990A CN 106904990 A CN106904990 A CN 106904990A CN 201710181170 A CN201710181170 A CN 201710181170A CN 106904990 A CN106904990 A CN 106904990A
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China
Prior art keywords
parts
ceramic core
core
electro
activated carbon
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Withdrawn
Application number
CN201710181170.8A
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Chinese (zh)
Inventor
董寅生
朱文杰
邵里良
周长军
唐荣俊
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XINGHUA XINGDONG CAST STEEL Co Ltd
Southeast University
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XINGHUA XINGDONG CAST STEEL Co Ltd
Southeast University
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Application filed by XINGHUA XINGDONG CAST STEEL Co Ltd, Southeast University filed Critical XINGHUA XINGDONG CAST STEEL Co Ltd
Priority to CN201710181170.8A priority Critical patent/CN106904990A/en
Publication of CN106904990A publication Critical patent/CN106904990A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • C04B35/10—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 aluminium oxide
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
    • 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
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • 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
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a kind of high porosity Water-soluble ceramic core and preparation method thereof, the ceramic core is mainly made up of following raw material：80 100 parts of electro-corundum powder, 3 10 parts of NaCl, K2CO39 20 parts, 1 3% part of activated carbon.After above-mentioned raw materials are compressing ceramic core is obtained in 725 730 DEG C of sintering within 1 hour.Relative to prior art, the technology of the present invention has the advantage that：The present invention adds pore forming material in Water-soluble ceramic core dispensing, improves the porosity of ceramic core, reduces consistency, can improve dissolution velocity of the core in water.

Description

A kind of high porosity Water-soluble ceramic core and preparation method thereof
Technical field
The invention discloses a kind of high porosity Water-soluble ceramic core and preparation method thereof, belong to precision casting technology neck Domain.
Background technology
Lightweight is the important channel for realizing energy-saving and emission-reduction, is to realize light-weighted two using light material and light body structure Individual main path, therefore, the lightweight of equipment is related to two aspects of material and structure.It is in recent years, traditional in terms of material Steel, ironware gradually reduce share, and the application of the alloy in lightweight with Al alloys andMg alloys as representative, development are achieved considerable enters Step；In configuration aspects, the function of being realized by multiple part combinations in the past gradually adopts single component to realize, casting and forging, Number of parts is reduced for riveting to cast, equipment weight is reduced, while also improving the reliability of equipment.
These changes generally make the part have the inner chamber of more complicated profile and polymorphic structure, bring new to castings production Challenge.On the one hand, because Al alloys andMg alloys pouring temperature is low, when forming inner chamber using resin sand core, the collapsibility of core after cast Difference, is difficult to shake out during cleaning；On the other hand, complicated inner cavity generally needs to be combined by multiple cores and could be formed, and technological design is multiple It is miscellaneous, and the deviation produced during core combination, influence the precision of casting.
These above-mentioned problems can well be solved using water-soluble core, and do not produced in casting pouring harmful Gas, convenient and swift during cleaning, without friction and noise can be removed core dissolution using hydroblast after casting forming, be obtained Casting with clean slippery inner surface and excellent dimensions precision, while saving labour and improving the environmental sanitation of foundry.
There are urea core, water soluble salt core using wide water-soluble core at present.But have the shortcomings that more significant：Urine Plain whose surfaces are of poor quality, gas forming amount big, are also easy to produce gas hole defect；And the spy such as the low-intensity of salt core, low heat resistant and fragility Point is extremely limited its application in alloy precision casting.Water-soluble ceramic core tool based on refractory material There are mechanical strength higher, refractoriness and chemical stability, meanwhile, with preferable water solubility, harshness can be effectively prevented from The infringement that is caused to aluminium alloy castings of depoling condition, therefore got a lot of applications in precision aluminium-alloy casting.
Water-soluble ceramic core based on refractory material, is expected to obtain mechanical strength higher, refractoriness and chemistry Stability, and it is preferably water-soluble.This kind of Water-soluble ceramic core it is main with indissoluble refractory material for example aluminum oxide, zirconium silicate, Silica etc. is base material, and soluble inorganic salt (chloride, carbonate or sulfate etc.) is binding agent, by corresponding shaping Technique is made.But due to generally using compressing, and the densification effect that inorganic salts fusing is produced in core sintering process Should, have impact on collapsibility of the core in water.It is appropriate in core to add pore forming material, its porosity is improved, core can be improved Collapsibility in water.
The content of the invention
Technical problem：The invention aims to overcome the deficiencies in the prior art, a kind of high porosity is proposed Water-soluble ceramic core and preparation method thereof,
Technical scheme：To achieve the above object, the invention provides a kind of high porosity Water-soluble ceramic core and its system Preparation Method,
Its raw material is constituted：80-100 parts of electro-corundum powder, NaCl 3-10 parts, K2CO3 9-20 parts, activated carbon powder 1-3 Part.
The granularity of described electro-corundum powder is 300 mesh, and the granularity of activated carbon is 200 mesh.
The preparation method of high porosity Water-soluble ceramic core of the invention is comprised the following steps：
1) by electro-corundum powder, NaCl, K2CO3It is put into baking oven with activated carbon, in 140 DEG C -150 DEG C of temperature 2.5h-3h Drying；
2) electro-corundum powder, NaCl, K of drying are weighed in ratio set in advance2CO3And activated carbon；
3) load weighted raw material is loaded the ball grinder of planetary ball mill, under the rotating speed of 350r/min-380r/min Ball milling 1.5h-2h；
4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 6MPa-8MPa, then The demoulding is carried out, base substrate is obtained；
5) the base substrate embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of firing rate Heat up, sintered 1 hour at 725 DEG C, obtain core.
Beneficial effect：Relative to prior art, the technology of the present invention has the advantage that：The present invention is in Water-soluble ceramic core Pore forming material is added in dispensing, the porosity of ceramic core is improve, consistency is reduced, dissolving of the core in water can be improved Speed.
Specific embodiment
The present invention is further described with reference to embodiment.
Embodiment 1：
(1) by electro-corundum powder, NaCl, K2CO3It is put into baking oven with activated carbon, in 140 DEG C -150 DEG C of temperature 2.5h- 3h is dried；
(2) 80 parts of the electro-corundum powder of drying, 5 parts of NaCl, K are weighed in ratio set in advance2CO315 parts, activated carbon 2 parts；
(3) load weighted raw material is loaded the ball grinder of planetary ball mill, the ball milling 1.5h- under the rotating speed of 350r/min 2h；
(4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 6MPa-8MPa, so After carry out the demoulding, obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 100 DEG C/h of intensifications of firing rate of setting, Sintered 1 hour at 725 DEG C, obtain core.
Embodiment 2：
(1) by electro-corundum powder, NaCl, K2CO3It is put into baking oven with activated carbon, in 140 DEG C -150 DEG C of temperature 2.5h- 3h is dried；
(2) 90 parts of the electro-corundum powder of drying, 10 parts of NaCl, K are weighed in ratio set in advance2CO320 parts, activity 1 part of charcoal；
(3) load weighted raw material is loaded the ball grinder of planetary ball mill, the ball milling 1.5h- under the rotating speed of 380r/min 2h；
(4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 6MPa-8MPa, so After carry out the demoulding, obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 100 DEG C/h of intensifications of firing rate of setting, Sintered 1 hour at 725 DEG C, obtain core.
Embodiment 3：
(1) by electro-corundum powder, NaCl, K2CO3It is put into baking oven with activated carbon, in 140 DEG C -150 DEG C of temperature 2.5h- 3h is dried；
(2) 100 parts of the electro-corundum powder of drying, 8 parts of NaCl, K are weighed in ratio set in advance2CO310 parts, activity 1 part of charcoal；
(3) load weighted raw material is loaded the ball grinder of planetary ball mill, the ball milling 1.5h- under the rotating speed of 360r/min 2h；
(4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 6MPa-8MPa, so After carry out the demoulding, obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h of intensifications of firing rate of setting, Sintered 1 hour at 725 DEG C, obtain core.
Embodiment 4：
(1) by electro-corundum powder, NaCl, K2CO3It is put into baking oven with activated carbon, in 140 DEG C -150 DEG C of temperature 2.5h- 3h is dried；
(2) 85 parts of the electro-corundum powder of drying, 3 parts of NaCl, K are weighed in ratio set in advance2CO320 parts, activated carbon 3 Part；
(3) load weighted raw material is loaded the ball grinder of planetary ball mill, the ball milling 1.5h- under the rotating speed of 350r/min 2h；
(4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 6MPa-8MPa, so After carry out the demoulding, obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 95 DEG C/h of intensifications of firing rate of setting, Sintered 1 hour at 725 DEG C, obtain core.

Claims (3)

1. a kind of high porosity Water-soluble ceramic core, it is characterised in that by weight, its raw material composition is：Electro-corundum Powder 80-100 parts, NaCl 3-10 parts, K2CO3 9-20 parts, activated carbon powder 1-3 parts.
2. high porosity Water-soluble ceramic core as claimed in claim 1, it is characterised in that：The grain of described electro-corundum powder It is 300 mesh to spend, and the granularity of activated carbon is 200 mesh.
3. a kind of preparation method of high porosity Water-soluble ceramic core as claimed in claim 1, it is characterised in that the method Comprise the following steps：
1）By electro-corundum powder, NaCl, K2CO3It is put into baking oven with activated carbon, is dried in 140 DEG C -150 DEG C of temperature 2.5h-3h It is dry；
2）Electro-corundum powder, NaCl, K of drying are weighed in ratio set in advance2CO3And activated carbon；
3）Load weighted raw material is loaded the ball grinder of planetary ball mill, the ball milling under the rotating speed of 350r/min-380r/min 1.5h-2h；
4）Mixed raw material is compressing, and moulding process is the pressurize 90s-120s under the pressure of 6MPa-8MPa, is then carried out The demoulding, obtains base substrate；
5）The base substrate embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of firing rate liter Temperature, sinters 1 hour at 725 DEG C, obtains core.
CN201710181170.8A 2017-03-24 2017-03-24 A kind of high porosity Water-soluble ceramic core and preparation method thereof Withdrawn CN106904990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710181170.8A CN106904990A (en) 2017-03-24 2017-03-24 A kind of high porosity Water-soluble ceramic core and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710181170.8A CN106904990A (en) 2017-03-24 2017-03-24 A kind of high porosity Water-soluble ceramic core and preparation method thereof

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CN106904990A true CN106904990A (en) 2017-06-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109678535A (en) * 2019-01-03 2019-04-26 安徽应流久源核能新材料科技有限公司 It is a kind of using powder as Water-soluble ceramic core of raw material and preparation method thereof
CN110181001A (en) * 2019-07-08 2019-08-30 鹰普航空零部件（无锡）有限公司 A kind of precision casting process of superalloy turbine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109678535A (en) * 2019-01-03 2019-04-26 安徽应流久源核能新材料科技有限公司 It is a kind of using powder as Water-soluble ceramic core of raw material and preparation method thereof
CN110181001A (en) * 2019-07-08 2019-08-30 鹰普航空零部件（无锡）有限公司 A kind of precision casting process of superalloy turbine

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