CN108555232A - A kind of centrifugal casting coating for cylinder sleeve of engine - Google Patents
A kind of centrifugal casting coating for cylinder sleeve of engine Download PDFInfo
- Publication number
- CN108555232A CN108555232A CN201810609848.2A CN201810609848A CN108555232A CN 108555232 A CN108555232 A CN 108555232A CN 201810609848 A CN201810609848 A CN 201810609848A CN 108555232 A CN108555232 A CN 108555232A
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- coating
- added
- centrifugal casting
- cylinder sleeve
- mineral clay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
Abstract
The invention discloses a kind of centrifugal casting coating for cylinder sleeve of engine, the weight percent of each raw material is：Mineral clay 30 50%, talcum powder 15 20%, amorphous graphite powder 2 5%, cellulose 1 3%, sodium cellulose xanghate 5 10%, disodium hydrogen phosphate 0.2 0.6%, surplus are water；The cast(ing) surface made of the coating is bright and clean, smooth；The design allowance of casting also greatly reduces；Metal die endoporus is also without remaining clagging；Further, since coating of the present invention requires the mold temperature used low, and casting can compare whole all take out of of coating with existing coating process when going out model, and the service life of metal die is substantially increased using coating of the present invention.
Description
Technical field
The invention belongs to engine cast-in cylinder jacket production technical fields, and in particular to one kind being used for cylinder sleeve of engine
Centrifugal casting coating.
Background technology
Currently, since petroleum resources are in short supply and environmental pollution, improve automobile engine fuel efficiency, reduced exhaust emissions
Seem and becomes more and more important.The two components of automobile engine be piston and cylinder sleeve, wherein cylinder sleeve require its material have high temperature resistant,
The performances such as wear-resisting, pressure-resistant and light.The improvement of engine performance certainly will propose in terms of selection and processing cylinder sleeve higher
It is required that.
When using die spinning technique productions cylinder jacket, it is desirable that coating plays protection mold, improves spray
Outer surface quality, control heat conduction rate of the pyrosol to mold.This requires centrifugal casting coatings to have higher antiscour
Ability, high resistance to fire intensity, low gas forming amount and preferable stripping result do not have after requiring casting to be detached from casting mold on metal die
There is remaining coating.
Invention content
The purpose of the present invention is to provide a kind of centrifugal casting coatings for cylinder sleeve of engine, are made of the coating
Cast(ing) surface is bright and clean, smooth, and the service life of metal die is substantially increased using coating of the present invention.
The purpose of the present invention can be achieved through the following technical solutions：
The weight percent of a kind of centrifugal casting coating for cylinder sleeve of engine, each raw material is：The weight hundred of each raw material
Point ratio is：Mineral clay 30-50%, talcum powder 15-20%, amorphous graphite powder 2-5%, cellulose 1-3%, cellulose sulfonic acid
Sodium 5-10%, disodium hydrogen phosphate 0.2-0.6%, surplus are water.
Further, the mineral clay is one or both of galapectite, sepiolite, kaolin, bentonite.
Further, the preparation method of the centrifugal casting coating is：
S1, it mineral clay is added in ball mill grinds, add the clay that water is modulated into a concentration of 15-20% molten
The concentrated sulfuric acid solution of 40-50% is added in liquid while stirring, when the pH of clayish solution is 2.1-2.7, stops adding for the concentrated sulfuric acid
Enter, stir 10-25min, be washed to neutrality, dries, be put into Muffle furnace, calcine 5-8h at 600-800 DEG C, pulverize and sieve i.e.
The mineral clay that must be activated；
S2, it the mineral clay of talcum powder and activation is added in screw extruder melts, the talcum of molten
Powder is to enter the layer compartment of mineral clay to get the mineral clay of intercalation has been arrived；
S3, sodium cellulose xanghate and absolute ethyl alcohol are added in blender, 2-3h is stirred at 40-50 DEG C, it is quiet after stirring
30min is set, chelate has been obtained；
S4, the mineral clay of intercalation, chelate, amorphous graphite powder, cellulose and water are added in blender, are mixed
After uniformly, disodium hydrogen phosphate is added, continues to stir 20-30min to get coating emulsion has been arrived；
S5, coating emulsion is sealed, carries out ageing 15-20h and has obtained centrifugal casting coating.
Further, the melting temperature described in step S2 is 90-110 DEG C.
Further, the Aging Temperature described in step S5 is 15-20 DEG C, humidity 55-65%.
Beneficial effects of the present invention：
A kind of centrifugal casting coating for cylinder sleeve of engine provided by the invention, the cast(ing) surface made of the coating
It is bright and clean, smooth；The design allowance of casting also greatly reduces；Metal die endoporus is also without remaining clagging；In addition,
Since coating of the present invention requires the mold temperature used low, and casting can all take coating entirety out of when going out model, and existing
There is coating process to compare, the service life of metal die is substantially increased using coating of the present invention.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
All other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Embodiment 1
The weight of a kind of centrifugal casting coating for cylinder sleeve of engine, each raw material is：Galapectite 40g, talcum powder 15g,
Amorphous graphite powder 3g, cellulose 2g, sodium cellulose xanghate 10g, disodium hydrogen phosphate 0.2g, surplus are water；
The preparation method of the centrifugal casting coating is：
S1, it mineral clay is added in ball mill grinds, water is added to be modulated into a concentration of 18% clayish solution,
45% concentrated sulfuric acid solution is added while stirring, the pH for detecting clayish solution is 2.5, stops the addition of the concentrated sulfuric acid, is stirred
15min is washed to neutrality, and drying is put into Muffle furnace, 6h is calcined at 700 DEG C, pulverizes and sieves viscous up to the minerals of activation
Soil；
S2, talcum powder and the mineral clay of activation are added in screw extruder, are melted at 95 DEG C, melted
The pregnant talcum powder of shape is to enter the layer compartment of mineral clay to get the mineral clay of intercalation has been arrived；
S3, inovulant, sodium cellulose xanghate and absolute ethyl alcohol are added in blender, 2.5h, stirring is stirred at 45 DEG C
After stand 30min, inovulant carries out huge legendary turtle with sodium cellulose xanghate and chelate has been obtained by the reaction；Inovulant and sodium cellulose xanghate
Chelatropic reaction expand the specific surface area of inovulant；
S4, the mineral clay of intercalation, chelate, amorphous graphite powder, cellulose and water are added in blender, are mixed
After closing uniformly, disodium hydrogen phosphate is added, continues to stir 20min to get coating emulsion has been arrived；
S5, coating emulsion is sealed, is 16 DEG C in temperature, humidity carries out ageing 16h and obtains in the environment of being 60%
Centrifugal casting coating.
Coating application
Using the coating of the prior art, the preheating temperature of metal die will reach 400 DEG C or more, just can guarantee the gold of casting
Phase A type graphite reaches 70% or more, and casting of metals die life can only achieve 300-500 parts.And use the painting of the present embodiment
After material, metal die only needs to be preheating to 220 DEG C or so, and the metallographic A type graphite of casting can reach 90% or more, and metal pours
Note die life can reach 1000 or more；It is not necessary that inovulant is added in the molten iron of high-temperature fusion, the inovulant in coating can
Customer complaint reacts to be formed with molten iron, further, since being added with surfactant in coating so that cast(ing) surface is coarse, so casting
Unilateral allowance reach 3-5mm；And after using coating of the present invention, the unilateral allowance of casting can be reduced to 1.5-
2.5mm。
Embodiment 2
The weight percent of a kind of centrifugal casting coating for cylinder sleeve of engine, each raw material is：Sepiolite 50g, talcum
Powder 20g, amorphous graphite powder 2g, cellulose 1g, sodium cellulose xanghate 5g, disodium hydrogen phosphate 0.2g, surplus are water；
The preparation method of the centrifugal casting coating is：
S1, it mineral clay is added in ball mill grinds, water is added to be modulated into a concentration of 20% clayish solution,
50% concentrated sulfuric acid solution is added while stirring, the pH for detecting clayish solution is 2.6, stops the addition of the concentrated sulfuric acid, is stirred
25min is washed to neutrality, and drying is put into Muffle furnace, 8h is calcined at 600 DEG C, pulverizes and sieves viscous up to the minerals of activation
Soil；
S2, talcum powder and the mineral clay of activation are added in screw extruder, are melted at 110 DEG C, melted
The pregnant talcum powder for melting shape enters the layer compartment of mineral clay to get the mineral clay of intercalation has been arrived；
S3, inovulant, sodium cellulose xanghate and absolute ethyl alcohol are added in blender, 3h are stirred at 50 DEG C, after stirring
30min is stood, inovulant carries out huge legendary turtle with sodium cellulose xanghate and chelate has been obtained by the reaction；Inovulant and sodium cellulose xanghate
Chelatropic reaction expands the specific surface area of inovulant；
S4, the mineral clay of intercalation, chelate, amorphous graphite powder, cellulose and water are added in blender, are mixed
After closing uniformly, disodium hydrogen phosphate is added, continues to stir 20min to get coating emulsion has been arrived；
S5, coating emulsion is sealed, is 15 DEG C in temperature, humidity carries out ageing 15h and obtains in the environment of being 65%
Centrifugal casting coating.
Embodiment 3
The weight percent of a kind of centrifugal casting coating for cylinder sleeve of engine, each raw material is：Mineral clay 30g,
Talcum powder 10g, amorphous graphite powder 5g, cellulose 3g, sodium cellulose xanghate 10g, silicon titanate innoculant 1.5g, disodium hydrogen phosphate
0.5g, water 40g；
The preparation method of the centrifugal casting coating is：
S1, it mineral clay is added in ball mill grinds, water is added to be modulated into a concentration of 18% clayish solution,
46% concentrated sulfuric acid solution is added while stirring, the pH for detecting clayish solution is 2.2, stops the addition of the concentrated sulfuric acid, is stirred
20min is washed to neutrality, and drying is put into Muffle furnace, 5h is calcined at 800 DEG C, pulverizes and sieves viscous up to the minerals of activation
Soil；
S2, talcum powder and the mineral clay of activation are added in screw extruder, are melted at 100 DEG C, melted
The pregnant talcum powder for melting shape enters the layer compartment of mineral clay to get the mineral clay of intercalation has been arrived；
S3, inovulant, sodium cellulose xanghate and absolute ethyl alcohol are added in blender, 2h are stirred at 40 DEG C, after stirring
30min is stood, inovulant carries out huge legendary turtle with sodium cellulose xanghate and chelate has been obtained by the reaction；Inovulant and sodium cellulose xanghate
Chelatropic reaction expands the specific surface area of inovulant；
S4, the mineral clay of intercalation, chelate, amorphous graphite powder, cellulose and water are added in blender, are mixed
After closing uniformly, disodium hydrogen phosphate is added, continues to stir 25min to get coating emulsion has been arrived；
S5, coating emulsion is sealed, is 20 DEG C in temperature, humidity carries out ageing 16h and obtains in the environment of being 55%
Centrifugal casting coating.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or substitutes by a similar method, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (5)
1. a kind of centrifugal casting coating for cylinder sleeve of engine, it is characterised in that：The weight percent of each raw material is：Minerals
Clay 30-50%, talcum powder 15-20%, amorphous graphite powder 2-5%, cellulose 1-3%, sodium cellulose xanghate 5-10%, phosphoric acid
Disodium hydrogen 0.2-0.6%, surplus are water.
2. a kind of centrifugal casting coating for cylinder sleeve of engine according to claim 1, it is characterised in that：The mine
Substance clay is one or both of galapectite, sepiolite, kaolin, bentonite.
3. a kind of centrifugal casting coating for cylinder sleeve of engine according to claim 1, it is characterised in that：The centrifugal casting
The preparation method for making coating is：
S1, it mineral clay is added in ball mill grinds, water is added to be modulated into the clayish solution of a concentration of 15-20%,
The concentrated sulfuric acid solution of 40-50% is added while stirring, when the pH of clayish solution is 2.1-2.7, stops the addition of the concentrated sulfuric acid, stirs
10-25min is mixed, neutrality is washed to, is dried, is put into Muffle furnace, 5-8h is calcined at 600-800 DEG C, is pulverized and sieved up to living
The mineral clay of change；
S2, it the mineral clay of talcum powder and activation is added in screw extruder melts, the talcum powder of molten is
Into mineral clay layer compartment to get having arrived the mineral clay of intercalation；
S3, sodium cellulose xanghate and absolute ethyl alcohol are added in blender, 2-3h is stirred at 40-50 DEG C, is stood after stirring
30min has obtained chelate；
S4, the mineral clay of intercalation, chelate, amorphous graphite powder, cellulose and water are added in blender, are uniformly mixed
Afterwards, disodium hydrogen phosphate is added, continues to stir 20-30min to get coating emulsion has been arrived；
S5, coating emulsion is sealed, carries out ageing 15-20h and has obtained centrifugal casting coating.
4. a kind of centrifugal casting coating for cylinder sleeve of engine according to claim 3, it is characterised in that：Step S2 institutes
The melting temperature stated is 90-110 DEG C.
5. a kind of centrifugal casting coating for cylinder sleeve of engine according to claim 3, it is characterised in that：Step S5 institutes
The Aging Temperature stated is 15-20 DEG C, humidity 55-65%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810609848.2A CN108555232B (en) | 2018-06-13 | 2018-06-13 | A kind of centrifugal casting coating for cylinder sleeve of engine |
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| CN201810609848.2A CN108555232B (en) | 2018-06-13 | 2018-06-13 | A kind of centrifugal casting coating for cylinder sleeve of engine |
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| CN108555232A true CN108555232A (en) | 2018-09-21 |
| CN108555232B CN108555232B (en) | 2019-11-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109290514A (en) * | 2018-11-23 | 2019-02-01 | 贵州安吉航空精密铸造有限责任公司 | A kind of low pressure core coating and preparation method thereof |
| CN113042689A (en) * | 2021-02-25 | 2021-06-29 | 庄顺宝 | Casting process of ferrous metal casting |
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| CN104588572A (en) * | 2014-12-30 | 2015-05-06 | 河南省中原内配股份有限公司 | Coating for centrifugal casting and preparation method |
| CN105127364A (en) * | 2015-08-25 | 2015-12-09 | 苏州热工研究院有限公司 | Mold releasing coating for centrifugal casting and painting method of mold releasing coating |
| CN105238992A (en) * | 2015-11-13 | 2016-01-13 | 中原内配集团安徽有限责任公司 | Casting method for engine cylinder sleeve |
| CN105344929A (en) * | 2015-11-13 | 2016-02-24 | 中原内配集团安徽有限责任公司 | Engine cylinder sleeve coating |
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| CN104588572A (en) * | 2014-12-30 | 2015-05-06 | 河南省中原内配股份有限公司 | Coating for centrifugal casting and preparation method |
| CN105127364A (en) * | 2015-08-25 | 2015-12-09 | 苏州热工研究院有限公司 | Mold releasing coating for centrifugal casting and painting method of mold releasing coating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109290514A (en) * | 2018-11-23 | 2019-02-01 | 贵州安吉航空精密铸造有限责任公司 | A kind of low pressure core coating and preparation method thereof |
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| CN113042689A (en) * | 2021-02-25 | 2021-06-29 | 庄顺宝 | Casting process of ferrous metal casting |
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| Publication number | Publication date |
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| CN108555232B (en) | 2019-11-15 |
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