CN103056288B - Lost foam casting paint for chromium-containing cast iron and preparation method thereof - Google Patents

Lost foam casting paint for chromium-containing cast iron and preparation method thereof Download PDF

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CN103056288B
CN103056288B CN201310029398.7A CN201310029398A CN103056288B CN 103056288 B CN103056288 B CN 103056288B CN 201310029398 A CN201310029398 A CN 201310029398A CN 103056288 B CN103056288 B CN 103056288B
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acetic acid
acid esters
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CN103056288A (en
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陆万玉
杨加祥
夏治寨
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Ma'anshan Huada Metallurgical & Machinery Co Ltd
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Ma'anshan Huada Metallurgical & Machinery Co Ltd
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Abstract

The invention provides a lost foam casting paint for chromium-containing cast iron and a preparation method thereof. The paint comprises the following components in percentage by weight: 15-20% of nano K2O. Al2O3.6SiO2 composite powder, 8-12% of blast furnace slag powder, 0.15-0.2% of sodium dodecyl benzene sulfonate, 2-5% of sodium bentonite, 1-2.5% of silica sol, 5-8% of 3-methyl-2-butenyl-1-ol acetate composite solution and the balance of quartz powder. The blast furnace slag comprises the following components in percentage by weight: 36-40% of CaO, 13-15% of Al2O3, 6-9% of MgO, 0.6-0.9% S, 0.3-0.5% of FeO and the balance of SiO2. The particle size of the K2O.Al2O3.6SiO2 composite powder is 80-100 nm, the particle size of the sodium bentonite and blast furnace slag powder is 80-100 mu m, and the particle size of the quartz powder is 1-5 mm.

Description

Lost foam casting coating and preparation method thereof for a kind of chromium cast iron contained
Technical field
The invention belongs to casting field, relate to lost foam casting coating and preparation method thereof for a kind of chromium cast iron contained.
Background technology
No. 201110228516.8 applications disclose a kind of coating for lost foam casting cast iron and manufacture craft thereof, wherein proportioning is got silica flour, graphite powder (lead powder), crystalline graphite powder, lithium bentonite, phenolic resins, carboxymethyl cellulose, milky white adhesive, n-octyl alcohol in accordance with regulations, through adding regulation ratio hot water and the blanking of regulation order, stirs the available coating of acquisition.
201210319941.2 number application relates to a kind of cast iron lost foam paint and preparation method thereof, coating comprises following component: bauxite chamotte 45-55 weight portion, quartz sand 20-30 weight portion, sodium bentonite 1-3 weight portion, CMC0.5-1.5 weight portion, polyvinyl alcohol (PVA) 0.5-1.5 weight portion, the T-80 of 0.1-0.3 weight portion, n-octyl alcohol 0.2-0.5 weight portion, ferric oxide red powder 0.5-1.5 weight portion.
The problem that above-mentioned coating exists is, suspension and intensity are also not enough, and contain harmful components in coating composition, and n-octyl alcohol wherein has spread effect to eyes, skin, mucous membrane and the upper respiratory tract.
Summary of the invention
Object of the present invention is exactly for above-mentioned technological deficiency, and a kind of chromium cast iron contained lost foam casting coating is provided, and not only has good suspension and elevated temperature strength, and raw material non-environmental-pollution.
Another object of the present invention is to provide a kind of chromium cast iron contained lost foam casting coating preparation method, and this preparation method's technique is simple, and production cost is low, is suitable for suitability for industrialized production.
Lost foam casting coating of the present invention is for chromium cast iron contained.
The object of the invention is to be achieved through the following technical solutions:
oneplant chromium cast iron contained lost foam casting coating, it is characterized in that: in this coating, the percentage by weight of each composition is: nanoscale K 2oAl 2o 36SiO 2composite granule 15-20%, blast-furnace slag powder 8-12%, neopelex 0.15-0.2%, sodium bentonite 2-5%, Ludox 1-2.5%, 3-M2BOL acetic acid esters composite solution 5-8%, all the other are silica flour;
Wherein blast-furnace slag composition percentage by weight be CaO 36-40%, Al 2o 313-15%, MgO 6-9%, S 0.6-0.9%, FeO 0.3-0.5%, all the other are SiO 2;
Nanoscale K 2oAl 2o 36SiO 2the particle diameter of composite granule is 80-100nm, and the particle diameter of sodium bentonite and blast-furnace slag powder is 80-100 μ m, and the particle diameter of silica flour is 1-5mm.
Described 3-M2BOL acetic acid esters composite solution is formulated by the following method: wherein raw materials used percentage by weight is: dioctyl phthalate 4-6%, n-butanol 1-2%, polyvinyl alcohol 4-8%, potassium peroxydisulfate 0.15-0.19%, 3-M2BOL acetic acid esters 45-50%, surplus is water; First dioctyl phthalate is mixed with n-butanol, stir it is dissolved, form solution first stand-by; In container, add water, be heated to 80 ℃, under agitation add polyvinyl alcohol, be warming up to 95 ℃, insulation is to all dissolving; After to be dissolved, stop heating and make temperature be down to 68~70 ℃, under agitation add 3-M2BOL acetic acid esters, form solution second stand-by; Solution first and solution second are mixed, add potassium peroxydisulfate, be uniformly mixed, be warmed up between 65~70 ℃, stop 1 hour, obtain 3-M2BOL acetic acid esters composite solution.
The preparation method of lost foam casting coating for above-mentioned chromium cast iron contained, comprises the following steps:
1) nanoscale K 2oAl 2o 36SiO 2composite granule is prepared:
Preparation ZrOCl 2the aqueous solution, usings ammoniacal liquor as precipitating reagent; In supersonic frequency, be that 50kHz, power are under the condition of 400W continuous stirring, by ZrOCl 2the aqueous solution is added drop-wise in precipitating reagent with the speed of 2mL/min, and the pH value of controlling solution is 9; After dropwising, continue to stir 3h, then standing aging 6h, obtains Zr (OH) 4hydrosol A is stand-by;
By FeCl 36H 2o and FeCl 24H 2o mixes, and glucan T-40 is dissolved in pure water under the environment of inflated with nitrogen, then adds FeCl 36H 2o and FeCl 24H 2o mixture; By constant temperature blender with magnetic force, stir, drip 30% ammoniacal liquor 1200ml simultaneously, be warming up to 80 ℃, 1200r/min, reaction 1h obtains colloid B; FeCl wherein 36H 2o, FeCl 24H 2the weight ratio of O, glucan T-40 and pure water is 100:37:214:1500; The volume ratio 15:12 of pure water and ammoniacal liquor;
By hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder is in mass ratio for 0.6:1:0.8-1.1 mixes; K 2oAl 2o 36SiO 2the particle diameter of powder is 60-80nm; Under supersonic frequency 50kHz power, 400W in 50-55 ℃ of ultrasonic agitation 0.5h; Then constant pressure and dry 5h at 100 ℃, obtains nanoscale K 2oAl 2o 36SiO 2composite granule;
2) preparation of 3-M2BOL acetic acid esters composite solution: wherein raw materials used percentage by weight is: dioctyl phthalate 4-6%, n-butanol 1-2%, polyvinyl alcohol 4-8%, potassium peroxydisulfate 0.15-0.19%, 3-M2BOL acetic acid esters 45-50%, surplus is water; First dioctyl phthalate is mixed with n-butanol, stir it is dissolved, form solution first stand-by; In container, add water, be heated to 80 ℃, under agitation add polyvinyl alcohol, be warming up to 95 ℃, insulation is to all dissolving; After to be dissolved, stop heating and make temperature be down to 68~70 ℃, under agitation add 3-M2BOL acetic acid esters, form solution second stand-by; Solution first and solution second are mixed, add potassium peroxydisulfate, be uniformly mixed, be warmed up between 65~70 ℃, stop 1 hour, obtain 3-M2BOL acetic acid esters composite solution, stand-by;
3) chromium cast iron contained is prepared with lost foam casting coating: each composition is prepared as following weight percent: above-mentioned nanoscale K 2oAl 2o 36SiO 2composite granule 15-20%, blast-furnace slag powder 8-12%, neopelex 0.15-0.2%, sodium bentonite 2-5%, Ludox 1-2.5%, 3-M2BOL acetic acid esters composite solution 5-8%, all the other are silica flour; Then each composition being put into container stirs and get final product.
Step 1) is prepared Zr (OH) 4zrOCl in hydrosol A 2the dense of the aqueous solution crosses as 0.2mol/L.
Step 1) is prepared Zr (OH) 4ammoniacal liquor as precipitating reagent in hydrosol A adopts 2.5% ammoniacal liquor.
the present invention has following beneficial effect compared to existing technology:
Nanoscale K in lost foam casting coating composition for chromium cast iron contained of the present invention 2oAl 2o 36SiO 2composite granule, has a large amount of micro interfaces, has good thermal insulation; And there is higher body intensity, significantly improved the high low temperature intensity of coating.Nanoscale K 2oAl 2o 36SiO 2composite granule, under the effect of neopelex, has good suspension.
Ludox and the combination of 3-M2BOL acetic acid esters composite solution in coating of the present invention, by strengthening the cross-link intensity of adhesive material in nano coating, improved high temperature and the low temperature intensity of coating greatly.In addition Ludox and 3-M2BOL acetic acid esters composite solution and nanoscale K, 2oAl 2o 36SiO 2composite granule has good affinity, also can significantly improve high temperature and the low temperature intensity of coating.
In coating of the present invention, slag powder has microcosmic porous, both can improve the heat-insulating capability of material, and reduce costs.
It has good heat insulation heat resistance, good suspension coating of the present invention.
Accompanying drawing explanation
Fig. 1 is that the chromium cast iron contained that the embodiment of the present invention 1 obtains is organized with lost foam casting coating.
As seen from Figure 1, this coating is coated in behind evaporative pattern surface, and even tissue is closely knit.
the specific embodiment:
in following examples, Ludox model used adopts JN-30 Ludox; Polyvinyl alcohol model used is 2488.
embodiment mono-:
Chromium cast iron contained of the present invention is as follows by the preparation process of lost foam casting coating:
1) nanoscale K 2oAl 2o 36SiO 2composite granule is prepared:
By ZrOCl 2.8H 2o and water are made the ZrOCl that concentration is 0.2mol/L 2the aqueous solution; 25% ammoniacal liquor is diluted to 10 times as precipitating reagent;
In supersonic frequency, be that 50kHz, power are under the condition of 400W continuous stirring, by ZrOCl 2the aqueous solution is added drop-wise in precipitating reagent with the speed of 2mL/min, and the pH value of controlling solution is 9; After dropwising, continue to stir 3h, then standing aging 6h, obtains Zr (OH) 4hydrosol A is stand-by;
By the FeCl of 100g 36H 2o and 37gFeCl 24H 2o mixes, and 214g glucan T-40 is dissolved in 1500ml pure water under the environment of inflated with nitrogen, then adds FeCl 36H 2o and FeCl 24H 2the mixture of O; By constant temperature blender with magnetic force, stir, drip 30% ammoniacal liquor 1200ml simultaneously, be warming up to 80 ℃, 1200r/min, reaction 1h obtains colloid B;
By hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder is in mass ratio for 0.6:1:0.8 mixes; K 2oAl 2o 36SiO 2the particle diameter of powder is 60-80nm; Under supersonic frequency 50kHz power, 400W in 50-55 ℃ of ultrasonic agitation 0.5h; Then the dry 5h of normal pressure (atmospheric pressure) at 100 ℃, obtains nanoscale K 2oAl 2o 36SiO 2composite granule;
2) preparation of 3-M2BOL acetic acid esters composite solution: wherein the percentage by weight of each composition is: dioctyl phthalate 5%, n-butanol 1%, polyvinyl alcohol 6%, potassium peroxydisulfate 0.16%, 3-M2BOL acetic acid esters 48%, surplus is water; First dioctyl phthalate is mixed with n-butanol, stir it is dissolved, form solution first stand-by; In container, add water, be heated to 80 ℃, under agitation add polyvinyl alcohol, be warming up to 95 ℃, insulation is to all dissolving; After to be dissolved, stop heating and make temperature be down to 68~70 ℃, under agitation add 3-M2BOL acetic acid esters, form solution second stand-by; Solution first and solution second are mixed, add potassium peroxydisulfate, be uniformly mixed, be warmed up between 65~70 ℃, stop 1 hour, obtain 3-M2BOL acetic acid esters composite solution, stand-by;
3) chromium cast iron contained is prepared with lost foam casting coating: each composition is prepared as following weight percent: above-mentioned nanoscale K 2oAl 2o 36SiO 2composite granule 15%, blast-furnace slag powder 8%, neopelex 0.15%, sodium bentonite 2%, Ludox 1%, above-mentioned 3-M2BOL acetic acid esters composite solution 5%, all the other are silica flour; Then each composition being put into container stirs and obtains coating of the present invention.
embodiment bis-:
Nanoscale K in step 1) 2oAl 2o 36SiO 2composite granule is prepared: hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder mixing quality is than being 0.6:1:1.0.
Step 3) chromium cast iron contained is prepared with lost foam casting coating: the percentage by weight of each composition is: nanoscale K 2oAl 2o 36SiO 2composite granule 15-20%, slag powder 12%, neopelex 0.2%, sodium bentonite 5%, Ludox 2.5%, 3-M2BOL acetic acid esters composite solution 8%, silica flour all the other.
All the other processes are with embodiment mono-.
embodiment tri-:
Nanoscale K in step 1) 2oAl 2o 36SiO 2composite granule is prepared: hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder mixing quality is than being 0.6:1:1.1.
Step 3) chromium cast iron contained is prepared with lost foam casting coating: the percentage by weight of each composition is: nanoscale K 2oAl 2o 36SiO 2composite granule 17%, slag powder 10%, neopelex 0.17%, sodium bentonite 4%, Ludox 1.5%, 3-M2BOL acetic acid esters composite solution 6%, silica flour all the other.
All the other processes are with embodiment mono-.
embodiment tetra-: (proportioning components is not in scope of design of the present invention)
Nanoscale K in step 1) 2oAl 2o 36SiO 2composite granule is prepared: hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder mixing quality is than being 0.6:1:1.3.
Step 3) chromium cast iron contained is prepared with lost foam casting coating: the percentage by weight of each composition is: nanoscale K 2oAl 2o 36SiO 2composite granule 15-20%, slag powder 5%, neopelex 0.1%, sodium bentonite 1%, Ludox 0.5%, 3-M2BOL acetic acid esters composite solution 4%, silica flour all the other.
All the other processes are with embodiment mono-.
embodiment five: (proportioning components is not in scope of design of the present invention)
Nanoscale K in step 1) 2oAl 2o 36SiO 2composite granule is prepared: hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder mixing quality is than being 0.6:1:0.7.
Step 3) chromium cast iron contained is prepared with lost foam casting coating: the percentage by weight of composition is: nanoscale K 2oAl 2o 36SiO 2composite granule 23%, slag powder 14%, neopelex 0.3%, sodium bentonite 6%, Ludox 3.5%, 3-M2BOL acetic acid esters composite solution 9%, silica flour all the other.
All the other processes are with embodiment mono-.
test: the performance measurement of the corresponding coating of the present invention of following table and contrast coating 1, the suspensibility of coating is directly tested.High and low temperature strength detection need be brushed on evaporative pattern surface and carry out.
finish code material composition 72 hours be greater than/% of suspensibility be greater than/g(2 of low temperature intensity layer 1.0mm) be greater than/g of elevated temperature strength (1200 degree roasting).
contrast coating 1 201210319941.2 number coating that obtains of application 98 800 650
coating 1 the coating of embodiment mono-preparation 99 860 700
coating 2 the coating of embodiment bis-preparations 100 890 710
coating 3 the coating of embodiment tri-preparations 100 890 720
coating 4 the coating of embodiment tetra-preparations 97 820 680
coating 5 the coating of embodiment five preparations 96 830 700
Ludox and 3-M2BOL acetic acid esters composite solution in coating of the present invention, the very few solvent action that do not have, too much can dilute the heat insulation composition of coating; Neopelex is the enhancing component in coating, does not very fewly have a bonding effect, too much can dilute composite granule and 3-M2BOL acetic acid esters composite solution; Nanoscale K 2oAl 2o 36SiO 2the very few heat-blocking action that do not have of composite granule, too much can reduce the bonding effect of bonding agent.

Claims (4)

1. a chromium cast iron contained lost foam casting coating, is characterized in that: in this coating, the percentage by weight of each composition is: nanoscale K 2oAl 2o 36SiO 2composite granule 15-20%, blast-furnace slag powder 8-12%, neopelex 0.15-0.2%, sodium bentonite 2-5%, Ludox 1-2.5%, 3-M2BOL acetic acid esters composite solution 5-8%, all the other are silica flour;
Wherein blast-furnace slag composition percentage by weight be CaO36-40%, Al 2o 313-15%, MgO6-9%, S0.6-0.9%, FeO0.3-0.5%, all the other are SiO 2;
Nanoscale K 2oAl 2o 36SiO 2the particle diameter of composite granule is 80-100nm, and the particle diameter of sodium bentonite and blast-furnace slag powder is 80-100 μ m, and the particle diameter of silica flour is 1-5mm;
Described 3-M2BOL acetic acid esters composite solution is formulated by the following method: wherein raw materials used percentage by weight is: dioctyl phthalate 4-6%, n-butanol 1-2%, polyvinyl alcohol 4-8%, potassium peroxydisulfate 0.15-0.19%, 3-M2BOL acetic acid esters 45-50%, surplus is water; First dioctyl phthalate is mixed with n-butanol, stir it is dissolved, form solution first stand-by; In container, add water, be heated to 80 ℃, under agitation add polyvinyl alcohol, be warming up to 95 ℃, insulation is to all dissolving; After to be dissolved, stop heating and make temperature be down to 68~70 ℃, under agitation add 3-M2BOL acetic acid esters, form solution second stand-by; Solution first and solution second are mixed, add potassium peroxydisulfate, be uniformly mixed, be warmed up between 65~70 ℃, stop 1 hour, obtain 3-M2BOL acetic acid esters composite solution.
2. the preparation method of lost foam casting coating for chromium cast iron contained, is characterized in that: the method comprises the following steps:
1) nanoscale K 2oAl 2o 36SiO 2composite granule is prepared:
Preparation ZrOCl 2the aqueous solution, usings ammoniacal liquor as precipitating reagent; In supersonic frequency, be that 50kHz, power are under the condition of 400W continuous stirring, by ZrOCl 2the aqueous solution is added drop-wise in precipitating reagent with the speed of 2mL/min, and the pH value of controlling solution is 9; After dropwising, continue to stir 3h, then standing aging 6h, obtains Zr (OH) 4 hydrosol A stand-by;
By FeCl 36H 2o and FeCl 24H 2o mixes, and glucan T-40 is dissolved in pure water under the environment of inflated with nitrogen, then adds FeCl 36H 2o and FeCl 24H 2o mixture; By constant temperature blender with magnetic force, stir, drip 30% ammoniacal liquor 1200ml simultaneously, be warming up to 80 ℃, 1200r/min, reaction 1h obtains colloid B; FeCl wherein 36H 2o, FeCl 24H 2the weight ratio of O, glucan T-40 and pure water is 100:37:214:1500; The volume ratio 15:12 of pure water and ammoniacal liquor;
By hydrosol A, colloid B and K 2oAl 2o 36SiO 2powder is in mass ratio for 0.6:1:0.8-1.1 mixes; K 2oAl 2o 36SiO 2the particle diameter of powder is 60-80nm; Under supersonic frequency 50kHz power, 400W in 50-55 ℃ of ultrasonic agitation 0.5h; Then constant pressure and dry 5h at 100 ℃, obtains nanoscale K 2oAl 2o 36SiO 2composite granule;
2) preparation of 3-M2BOL acetic acid esters composite solution: wherein raw materials used percentage by weight is: dioctyl phthalate 4-6%, n-butanol 1-2%, polyvinyl alcohol 4-8%, potassium peroxydisulfate 0.15-0.19%, 3-M2BOL acetic acid esters 45-50%, surplus is water; First dioctyl phthalate is mixed with n-butanol, stir it is dissolved, form solution first stand-by; In container, add water, be heated to 80 ℃, under agitation add polyvinyl alcohol, be warming up to 95 ℃, insulation is to all dissolving; After to be dissolved, stop heating and make temperature be down to 68~70 ℃, under agitation add 3-M2BOL acetic acid esters, form solution second stand-by; Solution first and solution second are mixed, add potassium peroxydisulfate, be uniformly mixed, be warmed up between 65~70 ℃, stop 1 hour, obtain 3-M2BOL acetic acid esters composite solution, stand-by;
3) chromium cast iron contained is prepared with lost foam casting coating: each composition is prepared as following weight percent: above-mentioned nanoscale K 2oAl 2o 36SiO 2composite granule 15-20%, blast-furnace slag powder 8-12%, neopelex 0.15-0.2%, sodium bentonite 2-5%, Ludox 1-2.5%, 3-M2BOL acetic acid esters composite solution 5-8%, all the other are silica flour; Then each composition being put into container stirs and get final product.
3. the preparation method of lost foam casting coating for chromium cast iron contained according to claim 2, is characterized in that: step 1) prepare the dense of the ZrOCl2 aqueous solution in Zr (OH) 4 hydrosol A and cross as 0.2mol/L.
4. the preparation method of lost foam casting coating for chromium cast iron contained according to claim 2, is characterized in that: step 1) prepare the ammoniacal liquor as precipitating reagent in Zr (OH) 4 hydrosol A and adopt 2.5% ammoniacal liquor.
CN201310029398.7A 2013-01-25 2013-01-25 Lost foam casting paint for chromium-containing cast iron and preparation method thereof Active CN103056288B (en)

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CN103302238B (en) * 2013-06-24 2015-07-01 李露青 Preparation method of low-cost high-performance lost foam casting coating
CN105057573A (en) * 2015-07-27 2015-11-18 明光市留香泵业有限公司 High-permeability water-based paint containing nanometer activated carbon for lost foam casting and manufacturing method of water-based paint
CN106964752A (en) * 2017-05-17 2017-07-21 东风精密铸造安徽有限公司 A kind of resin-coated sand shell mould cast carbon steel formulation for coating material and preparation technology

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JP2006181579A (en) * 2004-12-27 2006-07-13 Kao Corp Composition of facing material
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CN102836961A (en) * 2012-10-09 2012-12-26 嘉禾巨人机床有限公司 Lost foam coating for large casting and preparation method of lost foam coating

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JP2006181579A (en) * 2004-12-27 2006-07-13 Kao Corp Composition of facing material
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CN102836961A (en) * 2012-10-09 2012-12-26 嘉禾巨人机床有限公司 Lost foam coating for large casting and preparation method of lost foam coating

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