CN103302236B - Alcohol-based non-zirconium composite refractory aggregate spray paint for wet cast steel and preparation method thereof - Google Patents
Alcohol-based non-zirconium composite refractory aggregate spray paint for wet cast steel and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an alcohol-based non-zirconium composite refractory aggregate spray paint for wet cast steel and a preparation method thereof. The spray paint is prepared from the components in parts by weight: 65-70 parts of mullite powder, 30-35 parts of magnesium aluminum spinel powder, 8-10 parts of cordierite flour, 2-5 parts of forsterite powder, 2.0-2.5 parts of magnesium silicate aluminum powder, 1-1.5 parts of calcium bentonite, 4-5 parts of water, 3-5 parts of ludox, 2-3 parts of modified rosin ester, 0.3-0.5 part of butyral resin, 41-54 parts of methyl alcohol, 15-20 parts of grain ethanol, and 10-15 parts of isopropanol. The alcohol-based non-zirconium composite refractory aggregate spray paint disclosed by the invention is low in cost; and the alcohol-based non-zirconium composite refractory aggregate spray paint with high cost can be replaced for spraying green sand.
Description
Technical field
The invention belongs to casting Modeling Material technical field, particularly relate to a kind of wet type cast steel alcohol radical non-zirconium matter composite fire aggregate sprayed coating and preparation method.
Background technology
In Foundry Production, the steel-casting adopting Sand Moulding Process to produce accounts for more than 90% of steel-casting total output.Sand mold kind for Steel Castings generally has water-glass sand, resin sand, clay green-sand etc.In order to prevent steel-casting from producing scab defect, these sand molds all need to apply cast paint.At present, the mo(u)ld blacking for Steel Castings mainly contains alcohol base class zircon flour coating, schmigel coating, silica flour wash, magnesia powder coating etc.In these coating, anti-steel-casting scab effect is it is preferred that alcohol zircon flour coating.But, zirconium English powder resource is closely exhausted, short supply, the price of its coating is more and more higher, general foundry enterprise is difficult to bear, the alcohol radical non-zirconium matter paint replacement zircon flour coatings such as the corundum class that numerous and confused employing price is lower are used for waterglass sand mold, resin bonded sand mould produces steel-casting, and obtain good effect, open a Tiao Xin road to Steel Castings.But non-for alcohol radical zirconium matter coating is used for wet type and produces steel-casting, its Sand sticking-resistant effect is but far away from alcohol zircon flour coating, and the steel-casting of production easily produces scab, burning into sand defect, cannot meet the quality needs of casting production.
The coating method of coating on sand mold mainly contains brushing, flow coat, spraying etc.Green-sand compression strength is very low, generally only has 0.015 ~ 0.020MPa, and the compression strength of other sand mold is all at more than 1.5MPa, and therefore, green-sand cannot bear wiping and touch.If with brushing, flow coating processes applying coatings on green-sand, breakage, drop easily occur on green-sand surface, thus steel-casting is made to produce the casting flaw such as scab, burning into sand.For this reason, spraying method applying coatings can only be adopted on green-sand surface.
At green-sand surface spraying coating, coating is loosened, and refractory aggregate particle is formed each other and disjunct point-like cover layer, and the molten steel be easy to by pouring into a mould washes away, and forms steel-casting scab defect.Alcohol zircon flour coating is sprayed on green-sand surface, and when high-temperature molten steel and zirconium English powder coating layer touch, the zirconium English powder particles in coating decomposition reaction can occur, and namely zirconium silicate is decomposed into zirconia and silica.The ferrous oxide of silica and molten steel surface reacts and generates ferrous metasilicate.The fusing point of ferrous metasilicate is only 1205 DEG C, full-bodied liquid state is presented under the high temperature of molten steel, just in time fill the porous void of coating, coating is made to sinter a fine and close closed tabular isolation surface into, stop molten steel to the infiltration of sand mold, thus prevent steel-casting from occurring scab defect, therefore, alcohol zircon flour coating is a kind of more satisfactory wet type cast steel cast paint.
And the single refractory aggregate coating of alcohol radical non-zirconium matter is used for wet type spraying, Sand sticking-resistant effect, far away from alcohol zircon flour coating, easily forms scab or burning into sand defect near steel-casting cast gate.Its reason is: refractory aggregate is generally the single refractory powder such as corundum class, magnesia, mullite, these refractory powders at high temperature structure and chemical stability high, not easily undergo phase transition, even do not react with iron oxide, formed without low melt-phase, coating is loosened, coating void enlargement under the high temperature of molten steel, fills without high viscosity liquid material again, cannot form fire-resistant separation layer, molten steel easily permeates, thus makes steel-casting produce scab defect.
Summary of the invention
For the deficiency that prior art exists, that the invention provides a kind of alternative alcohol zircon flour sprayed coating, with low cost alcohol radical non-zirconium matter composite fire aggregate sprayed coating and preparation method thereof.Alcohol radical of the present invention non-zirconium matter composite fire aggregate sprayed coating is applicable to wet type spraying, can be used for the production of Green Sand Mold Steel Casting.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of wet type cast steel alcohol radical non-zirconium matter composite fire aggregate sprayed coating, comprise refractory aggregate, agglutinant, suspending agent, sweller, high-temperature agglomerant, normal temperature binding agent, thickener and carrier, each component is as follows according to weight:
Refractory aggregate: mullite powder 65 ~ 70 weight portion, aluminum-spinel powder 30 ~ 35 weight portion;
Agglutinant: cordierite powder 8 ~ 10 weight portion, forsterite powder 2 ~ 5 weight portion;
Suspending agent: magnesium silicate aluminium powder 2.0 ~ 2.5 weight portion, calcium-base bentonite 1 ~ 1.5 weight portion;
Sweller: water 4 ~ 5 weight portion;
High-temperature agglomerant: Ludox 3 ~ 5 weight portion;
Normal temperature binding agent: modified rosin ester 2 ~ 3 weight portion;
Thickener: polyvinyl butyral resin 0.3 ~ 0.5 weight portion;
Carrier: methyl alcohol: 41 ~ 54 weight portions, grain alcohol 15 ~ 20 weight portion, isopropyl alcohol 10 ~ 15 weight portion.
Above-mentioned mullite powder is that the electrofused mullite powder of 65 ~ 70% and the fused mullite powder of 30 ~ 35% mix by mass percent; The granularity of electrofused mullite powder is 280 ~ 325 orders, wherein Al
2o
3mass content be 68 ~ 72%; Fused mullite Powder Particle Size is 800 ~ 1000 orders, wherein Al
2o
3mass content be 43 ~ 47%.
Above-mentioned aluminum-spinel powder is slug type aluminum-spinel powder, and granularity is 400 ~ 600 orders, wherein Al
2o
3mass content be the mass content of 71 ~ 76%, MgO be 22 ~ 27%.
Above-mentioned cordierite powder is slug type cordierite powder, and granularity is 280 ~ 325 orders, and wherein the mass content of MgO is 12 ~ 15%, Al
2o
3mass content be 32 ~ 36%, SiO
2mass content be 48 ~ 53%.
Above-mentioned forsterite Powder Particle Size is 400 ~ 500 orders, wherein SiO
2mass content be the mass content of 25 ~ 30%, MgO be 40 ~ 45%, Fe
2o
3mass content be 8 ~ 10%.
Above-mentioned aluminium-magnesium silicate Powder Particle Size is 1250 ~ 1500 orders, and its pH value is 7.5 ~ 9.
The viscosity index of above-mentioned polyvinyl butyral resin is 8 ~ 15s.
The viscosity index of above-mentioned modified rosin ester is 40 ~ 60s.
Mass content >=98% of alcohol in above-mentioned methyl alcohol and b propanol, mass content >=95% of alcohol in above-mentioned grain alcohol.
The preparation method of above-mentioned wet type cast steel alcohol radical non-zirconium matter composite fire aggregate sprayed coating, comprises step:
Step one, auxiliary agent is prefabricated:
The magnesium silicate aluminium powder of 2.0 ~ 2.5 weight portions mixes with the water of 4 ~ 5 weight portions by 1.1, adds the grain alcohol of 15 ~ 20 weight portions and the Ludox of 3 ~ 5 weight portions, drops into grinding 8 ~ 12min in colloid mill, makes creme A;
1.2 methyl alcohol polyvinyl butyral resin of 0.3 ~ 0.5 weight portion being dissolved in 30 ~ 35 weight portions obtain clear solution A, drop in colloid mill and grind 8 ~ 12min, make creme B with creme A after being mixed by clear solution A;
The modified rosin ester of 2 ~ 3 weight portions to be dissolved in the methyl alcohol of 6 ~ 9 weight portions and to obtain clear solution B by 1.3, drops in colloid mill and grinds 8 ~ 12min, make creme C with the calcium-base bentonite of 1 ~ 1.5 weight portion after being mixed by clear solution B;
The methyl alcohol of creme B, creme C and 5 ~ 10 weight portions is added homogenizer by 1.4 stirs 20 ~ 30min, and make cream slurry D, homogenizer rotating speed is set to 750 ~ 1000r/min;
Step 2, the mixed system of coating:
The forsterite powder of the aluminum-spinel powder of the mullite powder of cream slurry D, 65 ~ 70 weight portions, 30 ~ 35 weight portions, the cordierite powder of 8 ~ 10 weight portions and 2 ~ 5 weight portions is added in kneader and mediate 1 ~ 1.5h discharging, pour the isopropyl alcohol of institute's discharging and 8 ~ 12 weight portions in homogenizer stirring 20 ~ 30min, then coating density is adjusted to 1.45 ~ 1.60g/cm by the isopropyl alcohol adding 2 ~ 3 weight portions
3.Homogenizer rotating speed is set to 750 ~ 1000r/min,
Compared with prior art, the present invention has the following advantages and beneficial effect:
1, alcohol radical of the present invention non-zirconium matter composite fire aggregate sprayed coating is with low cost, and the alcohol zircon flour sprayed coating that cost can be replaced higher sprays for green-sand.
2, at 1.45 ~ 1.60g/cm
3under spraying density, alcohol radical of the present invention non-zirconium matter composite fire aggregate sprayed coating has excellent suspension stability, suspensibility (2h)>=95%.
3, non-for alcohol radical of the present invention zirconium matter composite fire aggregate sprayed coating is sprayed on green-sand surface, coating infiltration is moderate, coating non-scale, not to ftracture and intensity is high; After cast, steel casting surface is bright and clean, and scab defect is few, can ensure steel-casting quality.
Detailed description of the invention
The present invention is further illustrated below in conjunction with embodiment.
Following raw material is all adopted in following embodiment:
(1) mullite powder adopted is mixed by electrofused mullite powder and fused mullite powder, and the mass percent of electrofused mullite powder is 65 ~ 70%, and its granularity is 280 ~ 325 orders, wherein Al
2o
3mass content be 68 ~ 72%; Fused mullite powder mass percent is 30 ~ 35%, and its granularity is 800 ~ 1000 orders, wherein Al
2o
3mass content 43 ~ 47%.
(2) the aluminum-spinel powder adopted is slug type aluminum-spinel powder, and granularity is 400 ~ 600 orders, wherein Al
2o
3mass content be the mass content of 71 ~ 76%, MgO be 22 ~ 27%.
(3) the cordierite powder adopted is slug type cordierite powder, and granularity is 280 ~ 325 orders, and wherein the mass content of MgO is 12 ~ 15%, Al
2o
3mass content be 32 ~ 36%, SiO
2mass content be 48 ~ 53%.
(4) the forsterite Powder Particle Size adopted is 400 ~ 500 orders, wherein SiO
2mass content be the mass content of 25 ~ 30%, MgO be 40 ~ 45%, Fe
2o
3mass content be 8 ~ 10%.
(5) the aluminium-magnesium silicate Powder Particle Size adopted is 1250 ~ 1500 orders, and its pH value is 7.5 ~ 9.
(6) viscosity index of the polyvinyl butyral resin adopted is 8 ~ 15s.
(7) viscosity index of the modified rosin ester adopted is 40 ~ 60s.
(8) mass content >=98% of alcohol in the methyl alcohol adopted and b propanol, mass content >=95% of alcohol in the grain alcohol adopted.
Embodiment 1
Step one, auxiliary agent is prefabricated:
The aluminium-magnesium silicate superfine powder of 2.0 weight portions mixes with the water of 4 weight portions by 1.1, adds the grain alcohol of 15 weight portions and the Ludox of 3 weight portions, drops in colloid mill and grinds 8min, make creme A;
The polyvinyl butyral resin of 0.3 weight portion to be dissolved in the methyl alcohol of 30 weight portions and to obtain clear solution A by 1.2, is mixed by clear solution A, drop in colloid mill and grind 8min, make creme B with creme A;
The modified rosin ester of 2 weight portions to be dissolved in the methyl alcohol of 6 weight portions and to obtain clear solution B by 1.3, is stirred by the calcium-base bentonite of clear solution B and 1 weight portion, drops in colloid mill and grind 8min, make creme C;
The methyl alcohol of creme B, creme C and 5 weight portions to add in homogenizer and stirs 20min by 1.4, makes cream slurry D.Rotating speed in homogenizer is set to 750 ~ 1000r/min.
Step 2, the mixed system of coating
Cream slurry D is added kneader, then adds the forsterite powder of the mullite powder of 65 weight portions, the aluminum-spinel powder of 30 weight portions, the cordierite powder of 8 weight portions and 2 weight portions, mediate 1h discharging; Institute's discharging added in homogenizer, and add the isopropyl alcohol of 8 weight portions, after stirring 20min, then the isopropyl alcohol adding 2 weight portions adjusts coating density to 1.45 ~ 1.60g/cm
3.In this step, homogenizer rotating speed is also set to 750 ~ 1000r/min.
Embodiment 2
Step one, auxiliary agent is prefabricated:
The aluminium-magnesium silicate superfine powder of 2.5 weight portions mixes with the water of 5 weight portions by 1.1, adds the grain alcohol of 20 weight portions and the Ludox of 5 weight portions, drops in colloid mill and grinds 12min, make creme A;
The polyvinyl butyral resin of 0.5 weight portion to be dissolved in the methyl alcohol of 35 weight portions and to obtain clear solution A by 1.2, is mixed by clear solution A, drop in colloid mill and grind 12min, make creme B with creme A;
The modified rosin ester of 3 weight portions to be dissolved in the methyl alcohol of 9 weight portions and to obtain clear solution B by 1.3, is stirred by the calcium-base bentonite of clear solution B and 1.5 weight portions, drops in colloid mill and grind 12min, make creme C;
The methyl alcohol of creme B and creme C and 10 weight portions to add in homogenizer and stirs 30min by 1.4, makes cream slurry D.Rotating speed in homogenizer is set to 750 ~ 1000r/min.
Step 2: the mixed system of coating
Cream slurry D is added in kneader, then adds the forsterite powder of the mullite powder of 70 weight portions, the aluminum-spinel powder of 35 weight portions, the cordierite powder of 10 weight portions and 5 weight portions, mediate 1.5h discharging; Institute's discharging added in homogenizer, and add the isopropyl alcohol of 12 weight portions, after stirring 30min, then the isopropyl alcohol adding 3 weight portions adjusts coating density to 1.45 ~ 1.60g/cm
3.In this step, homogenizer rotating speed is also set to 750 ~ 1000r/min.
Embodiment 3
Step one, auxiliary agent is prefabricated:
The aluminium-magnesium silicate superfine powder of 2.3 weight portions mixes with the water of 4.5 weight portions by 1.1, adds the grain alcohol of 17 weight portions and the Ludox of 4 weight portions, drops in colloid mill and grinds 10min, make creme A;
The polyvinyl butyral resin of 0.4 weight portion to be dissolved in the methyl alcohol of 32 weight portions and to obtain clear solution A by 1.2, is mixed by clear solution A, drop in colloid mill and grind 10min, make creme B with creme A;
The modified rosin ester of 2.5 weight portions to be dissolved in the methyl alcohol of 7.5 weight portions and to obtain clear solution B by 1.3, is stirred by the calcium-base bentonite of clear solution B and 1.2 weight portions, drops in colloid mill and grind 10min, make creme C;
Creme B, creme C and 8 parts by weight Methanol to add in homogenizer and stir 25min by 1.4, make cream slurry D.Rotating speed in homogenizer is set to 750 ~ 1000r/min.
Step 2: the mixed system of coating
Cream slurry D is added in kneader, adds the forsterite powder of the mullite powder of 67 weight portions, the aluminum-spinel powder of 33 weight portions, the cordierite powder of 9 weight portions and 3 weight portions, mediate 1.2h discharging; Institute's discharging added in homogenizer, and add the isopropyl alcohol of 10 weight portions, after stirring 25min, then the isopropyl alcohol adding 2.5 weight portions adjusts coating density to 1.45 ~ 1.60g/cm
3.In this step, homogenizer rotating speed is also set to 750 ~ 1000r/min.
Embodiment 1 ~ 3 gained coating is at 1.45 ~ 1.60g/cm
3spraying density under, its technical indicator is as table 1.
The technical indicator of table 1 embodiment 1 ~ 3 gained coating
Refractory aggregate in coating of the present invention is composite fire aggregate, comprises mullite powder and aluminum-spinel powder.Fusing point >=1800 DEG C of mullite powder, fusing point >=1700 DEG C of aluminum-spinel powder, all exceed molten steel fusing point, thus can ensure coating refractoriness.In agglutinant, containing a large amount of silica, iron oxide and magnesia in forsterite, sintering temperature about 1400 DEG C, and the fusing point of cordierite is only 1460 DEG C, all a little less than the fusing point of molten steel, therefore, with steel contacts after, a small amount of forsterite and cordierite can separate out part high viscosity liquid phase, filling paint refractory particle gap, reduce or seal coat and mould surface space, play the effect of isolation molten steel and sand mold.Part Ultrafine Mullite powder can infiltrate mould surface internal layer, with agglutinant forsterite, cordierite acting in conjunction, reinforces mould surface, prevents the burning into sand defect of steel-casting.Have employed composite suspension agent Magnesiumaluminumsilicate powder and calcium-base bentonite in coating, while guarantee suspension stability, coating refractoriness can not be reduced again.
In order to prevent dope layer from being washed out by steel flow in pouring molten steel process, make steel-casting form sticky burning into sand defect, the present invention adopts two kinds of technology: one is in coating, add normal temperature binding agent and high-temperature agglomerant.Normal temperature binding agent ensure that the coating being sprayed on wet type surface has normal temperature strength, and coating is dry linting not; High-temperature agglomerant make coating fail to sinter Sand sticking-resistant separation layer into before there is elevated temperature strength, ensure that coating is not washed away by high-temperature molten steel.Two is that the mullite powder adopted in coating comprises two kinds of different granularmetric compositions: some is coarse aggregate, for granularity is 280 ~ 325 object electrofused mullite powder; Another part is fine aggregate, for granularity is 800 ~ 1000 object fused mullite superfine powders.Mullite coarse aggregate is used for covering mould surface, forms surface anti sticking sand barrier; Mullite fine aggregate is used for filling sand grains space, forms Sand sticking-resistant barrier, play the effect of the dual fail-safe of Sand sticking-resistant in sand mold inside.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly belongs to those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. a wet type cast steel alcohol radical non-zirconium matter composite fire aggregate sprayed coating, it is characterized in that: comprise refractory aggregate, agglutinant, suspending agent, sweller, high-temperature agglomerant, normal temperature binding agent, thickener and carrier, each component is as follows according to weight:
Refractory aggregate: mullite powder 65 ~ 70 weight portion, aluminum-spinel powder 30 ~ 35 weight portion;
Agglutinant: cordierite powder 8 ~ 10 weight portion, forsterite powder 2 ~ 5 weight portion;
Suspending agent: magnesium silicate aluminium powder 2.0 ~ 2.5 weight portion, calcium-base bentonite 1 ~ 1.5 weight portion;
Sweller: water 4 ~ 5 weight portion;
High-temperature agglomerant: Ludox 3 ~ 5 weight portion;
Normal temperature binding agent: modified rosin ester 2 ~ 3 weight portion;
Thickener: polyvinyl butyral resin 0.3 ~ 0.5 weight portion;
Carrier: methyl alcohol: 41 ~ 54 weight portions, grain alcohol 15 ~ 20 weight portion, isopropyl alcohol 10 ~ 15 weight portion;
Described mullite powder is be 280 ~ 325 object electrofused mullite powder and granularity by granularity is that 800 ~ 1000 object fused mullite powder mix, and by mass percentage, wherein, electrofused mullite powder accounts for 65 ~ 70%, and fused mullite powder accounts for 30 ~ 35%; Al in electrofused mullite powder
2o
3mass content is 68 ~ 72%, the Al in fused mullite
2o
3mass content is 43 ~ 47%.
2. wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that:
Described aluminum-spinel powder is slug type aluminum-spinel powder, and granularity is 400 ~ 600 orders, wherein, and Al
2o
3mass content is 71 ~ 76%, MgO mass content is 22 ~ 27%.
3. wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that:
Described cordierite powder is slug type cordierite powder, and granularity is 280 ~ 325 orders, and wherein, MgO mass content is 12 ~ 15%, Al
2o
3mass content is 32 ~ 36%, SiO
2mass content is 48 ~ 53%.
4. wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that:
Described forsterite Powder Particle Size is 400 ~ 500 orders, wherein, and SiO
2mass content be the mass content of 25 ~ 30%, MgO be 40 ~ 45%, Fe
2o
3mass content be 8 ~ 10%.
5. wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that:
Described aluminium-magnesium silicate Powder Particle Size is 1250 ~ 1500 orders, and its pH value is 7.5 ~ 9.
6. wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that:
The viscosity index of described polyvinyl butyral resin is 8 ~ 15s.
7. wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that:
The viscosity index of described modified rosin ester is 40 ~ 60s.
8. the preparation method of wet type cast steel alcohol radical according to claim 1 non-zirconium matter composite fire aggregate sprayed coating, is characterized in that, comprise step:
Step one, auxiliary agent is prefabricated:
The magnesium silicate aluminium powder of 2.0 ~ 2.5 weight portions mixes with the water of 4 ~ 5 weight portions by 1.1, adds the grain alcohol of 15 ~ 20 weight portions and the Ludox of 3 ~ 5 weight portions, drops into grinding 8 ~ 12min in colloid mill, makes creme A;
1.2 methyl alcohol polyvinyl butyral resin of 0.3 ~ 0.5 weight portion being dissolved in 30 ~ 35 weight portions obtain clear solution A, drop in colloid mill and grind 8 ~ 12min, make creme B with creme A after being mixed by clear solution A;
The modified rosin ester of 2 ~ 3 weight portions to be dissolved in the methyl alcohol of 6 ~ 9 weight portions and to obtain clear solution B by 1.3, drops in colloid mill and grinds 8 ~ 12min, make creme C with the calcium-base bentonite of 1 ~ 1.5 weight portion after being mixed by clear solution B;
The methyl alcohol of creme B, creme C and 5 ~ 10 weight portions is added homogenizer by 1.4 stirs 20 ~ 30min, makes cream slurry D;
Step 2, the mixed system of coating:
The forsterite powder of the aluminum-spinel powder of the mullite powder of cream slurry D, 65 ~ 70 weight portions, 30 ~ 35 weight portions, the cordierite powder of 8 ~ 10 weight portions and 2 ~ 5 weight portions is added in kneader and mediate 1 ~ 1.5h discharging, pour the isopropyl alcohol of institute's discharging and 8 ~ 12 weight portions in homogenizer stirring 20 ~ 30min, then coating density is adjusted to 1.45 ~ 1.60g/cm by the isopropyl alcohol adding 2 ~ 3 weight portions
3; Described mullite powder is be 280 ~ 325 object electrofused mullite powder and granularity by granularity is that 800 ~ 1000 object fused mullite powder mix, and by mass percentage, wherein, electrofused mullite powder accounts for 65 ~ 70%, and fused mullite powder accounts for 30 ~ 35%; Al in electrofused mullite powder
2o
3mass content is 68 ~ 72%, the Al in fused mullite
2o
3mass content is 43 ~ 47%.
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| CN102744362A (en) * | 2012-07-26 | 2012-10-24 | 珠海市斗门福联造型材料实业有限公司 | Alcohol group casting coating with both dry-wet indication function and sintering peeling function and production process thereof |
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2013
- 2013-06-20 CN CN201310246190.0A patent/CN103302236B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584082A (en) * | 2017-08-26 | 2018-01-16 | 上海魁殊自动化科技有限公司 | A kind of method that coating is coated to casting mold |
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| CN103302236A (en) | 2013-09-18 |
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Inventor after: Huang Jin Inventor after: Liu Tao Inventor after: Long Wei Inventor after: Yan Zhuoming Inventor after: Jiao Hui Inventor after: Zhang Youshou Inventor after: Wu Yongliang Inventor after: Song Zhongming Inventor after: Xia Lu Inventor after: Jiang Ruifeng Inventor after: Li Sinian Inventor before: Huang Jin Inventor before: Zhang Youshou Inventor before: Xia Lu Inventor before: Li Sinian Inventor before: Song Zhongming Inventor before: Wu Yongliang Inventor before: Yan Zhuoming |
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Free format text: CORRECT: INVENTOR; FROM: HUANG JIN ZHANG YOUSHOU XIA LU LI SINIAN SONG ZHONGMING WU YONGLIANG YAN ZHUOMING TO: HUANG JIN YAN ZHUOMING JIAO HUI ZHANG YOUSHOU WU YONGLIANG SONG ZHONGMING XIA LU JIANG RUIFENG LI SINIAN LIU TAO LONG WEI |