CN100464895C - Light-color cast iron paint with high aluminium polycrystalline composite aggreagte - Google Patents
Light-color cast iron paint with high aluminium polycrystalline composite aggreagte Download PDFInfo
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- CN100464895C CN100464895C CNB2007100120997A CN200710012099A CN100464895C CN 100464895 C CN100464895 C CN 100464895C CN B2007100120997 A CNB2007100120997 A CN B2007100120997A CN 200710012099 A CN200710012099 A CN 200710012099A CN 100464895 C CN100464895 C CN 100464895C
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- high alumina
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Abstract
The light-color cast iron paint with high aluminum polycrystalline composite aggregate consists of high alumina powder with 70-85 wt% Al2O3 20-40 wt%, mullite powder 10-25 wt%, magnesia powder 3-10 wt%, superfine flux of pyroxene or La/Sr RE of 100-500 micron granularity 6-10 wt%, crystal nucleus agent of nanometer level Al, Zr or Cr powder 0.5-3.5 wt%, organic adhesive rosin or resin 1-3 wt%, bentonite as suspending agent 1-6 wt% and solvent of ethanol or isopropanol 30-40 wt% mixed together. The paint of the present invention is coated to cast iron parts for machine tool, and can obtain surface quality higher than that of black graphite paint and improve operation environment.
Description
Technical field
The present invention relates to the extraordinary mold wash that uses in a kind of iron casting production process, specifically relate to the light color cast iron paint of the compound aggregate of a kind of high alumina polycrystalline.
Background technology
In recent years, along with the fast development of China's economic construction, the output and the export volume thereof of foundry goods increase year by year, and the foundry of China's machine industry 90% has all adopted furan resin self curing sand technology.Because the extensive use of furan resin-sand on ironcasting makes the quality of China's ironcasting and dust pollution that significant improvement arranged., the nearly all iron casting production producer of China still continues to use traditional black blacking so far, and serious black pollution makes the environmental protection pressure of foundry enterprise increasing; And still be unable to do without the situation that crystalline flake graphite and zirconium English powder are made aggregate for thick big ironcasting, cause the waste of mineral resources and the increase of casting cost.In the today of stepping into 21 century, along with the continuous enhancing of people's environmental consciousness, the enforcement of Environmental Protection in China rules, also strict day by day to environmental protection requirement, the black pollution problem that solves the ironcasting graphite paint is extremely urgent.China has just carried out the research of ironcasting with light color (white) cast paint as far back as the eighties in 20th century, and for example: people such as lotus virtue in 1984 have proposed to adopt sintering theory to develop the whitewash that ironcasting is used; People such as nineteen ninety Xiao Dianzhao, peeling off theory with the sintering of coating is foundation, from the main performances such as rheological behavior of coating, has proposed the key component and the rational proportion of whitewash by orthogonal experiment; Subsequently, Ma Jinlong has delivered the article of " development of low-cost light cast paint ", propose to adopt the appropriate combination of polynary combination zirconium-containing series nonmetallic mineral material, to reduce the weld point of refractory aggregate, reach coating generation sintering under the high temperature when pouring metal melt, form the sintering separation layer, improve the anti-stick grittiness energy of dope layer.In addition, also having people such as enlightening merit to propose with zirconium English powder is main refractory aggregate, ironcasting light-coloured coating and a kind of of Wang Chengcai exploitation of adding auxiliary materials such as reduction resistance penetration enhancer zinc oxide and carborundum are base with the bauxite, other adds a kind of refractory material of additives and makes aggregate, make the sintering temperature of coating, improve the ability of its anti-stick sand etc. in the molten iron cast.Although since the eighties in 20th century, many reports have been delivered in China about light color (white) coating, but, great majority are to utilize traditional general refractory material to cooperate with the suitable of flux, to reduce the weld point of refractory aggregate, by the sinter layer of aggregate, play effect to the anti-stick sand of ironcasting.Although traditional general refractory material is under the effect of flux, can under lower temperature, produce sintering, but the temperature range of its sintering is too narrow, can not satisfy that all size differs in the iron casting production, the high-quality requirement of intricate casting of wall unevenness, thereby make when sintering appears in the thin place of foundry goods wall, the refractory aggregate at wall thickness place does not also reach the sintering sintering temperature, causes foundry goods heavy wall place to produce serious scab; Otherwise the place has produced sintering when casting section thickness, and thin-walled place coating runs off, attenuation, loses anti-stick sand effect.Therefore, during the light color of China (white) coating also really is not applied to produce so far.
Summary of the invention
Purpose of the present invention provides the light color cast iron paint of the compound aggregate of a kind of high alumina polycrystalline.This coating can make high alumina polycrystalline composite materials coating produce sintering in the temperature range of broad by the high temperature action of pouring metal melt, forms high viscosity, high fine and close, continuous sintered ceramic coating; Simultaneously, under the synergy of multiple additives such as flux and nucleus agent, in the sintered ceramic coating, produce " secondary crystallization ", further strengthened high temperature viscosity, intensity and the compactness of sintered ceramic coating, thereby, better solved the surperficial scab problem of the complicated ironcasting of wall unevenness.
Scab is the common a kind of surperficial casting flaw of foundry goods, generally is unlikely to when not serious foundry goods is scrapped, but results in hand cramps to production.It not only has a strong impact on the presentation quality of foundry goods, quickens the wearing and tearing of machine added-time cutter, and, increase its chipping workload and production cost, when serious foundry goods is scrapped.In recent years, also more and more stricter along with the continuous increase of China's exported product to the surface quality requirement of foundry goods, prevent that the scab of foundry goods from having caused people's great attention and extensive studies.Scab is the result of high-temperature liquid metal and type, core sand surface interaction, is the physics and the chemical process of a complexity, and it forms mechanism and does not also understand so far.But as can be seen, the scab of foundry goods is broadly divided into three kinds of principal modes such as the scab of liquid metal permeability, chemical reactivity scab and hot sticky sand from a large amount of production practices for we.For the resin sand foundry goods, modal is the scab of liquid metal permeability, and it is that liquid metal infiltrates the space between the sand grains, after the cooled and solidified sand grains is attached on firmly that cast(ing) surface causes.Elements such as phosphorus, silicon or manganese in the molten metal also can reduce the surface tension and the viscosity of molten metal, increase the tendency of molten metal permeability scab.Chemical scab again can be according to the size of itself and cast(ing) surface bond strength, is divided into easily peeling off scab and difficulty is peeled off two big classes such as scab.Practice finds, the scab bed thickness on the steel casting surface and easily peeling off, and the viscosity sand layer on the Iron Casting Surface is thin and difficulty is peeled off.Carbon content is low in this explanation steel-casting, and deoxidizing capacity is strong, exists strong oxidizing atmosphere at the interface of sand mold and molten metal, and this atmosphere makes molten steel surface form a large amount of Fe
2O
3, Fe
3O
4These two kinds of oxides are nonwetting to molten steel, and expanding in the back that is heated, makes the viscosity sand layer of formation become the not only thick but also loose iron oxide layer of easily peeling off, and the high-temperature resistant coating that adopts high-quality zirconium English powder to make aggregate just can obtain good effect.Yet, for ironcasting, because the content of elements such as wherein contained C, Si and Mn is higher, deoxidation voluntarily at high temperature, cause the oxidizing atmosphere at the interface of sand mold and molten metal not strong, molten iron can only be oxidized to FeO, and oxidation rate is slow, the quantity of the FeO that forms is also few, cause forming the not only thin but also difficult viscosity sand layer of peeling off of one deck, so ironcasting is in order to prevent chemical scab, be unable to do without to adopt the mold wash of graphite-like for a long time, this is the reason that China overwhelming majority's ironcasting factory adopts traditional graphite paint., serious black pollution must make foundry enterprise bear environmental pressure greatly.Be exactly under this historical background and Foundry Production active demand, we have developed ironcasting does not have graphite with environment-friendly type light mold wash, the coating main feature of being invented is: light environmental protection, strength of coating height, good, the anti-stick sand ability of compactness are strong, the complicated ironcasting that differs applicable to various wall unevennesses, radiating condition.
The technical scheme that adopts is:
The light color cast iron paint of the compound aggregate of high alumina polycrystalline is to be formed by material mixed preparing such as high alumina matter powder 20-40%, mullite powder 10-25%, magnesia powder 3-10%, ultra-fine flux 6-10%, nucleus agent 0.5-3.5%, organic binder bond 1-3%, bentonite suspending agent 1-6% and solvents 30-40%.
Above-mentioned percentage is weight percentage;
Al in the above-mentioned high alumina matter powder
2O
3Content be 70-85%;
Above-mentioned ultra-fine flux is ultra-fine pyroxene or lanthanum/strontium and rare earth class etc., and granularity is 100-500 μ m.
Above-mentioned organic binder bond is rosin or resin.
Above-mentioned nucleus agent is ultrafine solids dusty materials such as nanometer aluminum, zirconium, chromium.
Above-mentioned solvent is ethanol or isopropyl alcohol, concentration of alcohol 〉=95%, isopropyl alcohol concentration 〉=98%.
The production method of the light color cast iron paint of the compound aggregate of high alumina polycrystalline, be that 30-40% solvent is added 1-6% bentonite suspending agent, put into the container of belt stirrer, high-speed stirred is even, adds resin or rosin again, after continuing to stir, add ultra-fine flux 6-10% successively, 0.5 behind the magnesia powder of-3.5% nucleus agent, 20-40% high alumina matter powder, 10-25% mullite powder and 3-10%, stir, promptly.
Above-mentioned percentage is weight percentage.
The present invention has adopted the composite refractory of high alumina polycrystalline to make the aggregate of coating, be equipped with ultra-fine flux, nucleus agent etc., under the heat effect of high-temperature liquid metal and form a kind of high viscosity, high fine and close, continuous composite ceramic coat, change by the refractory aggregate component, can control the high temperature sintering temperature range of refractory aggregate artificially, to satisfy the various ironcasting demand of practical production of complex structure, wall unevenness, temperature difference great disparity.Particularly under the synergy of flux and nucleus agent, in the ceramic post sintering coating, can form " the secondary crystallization phase " of a large amount of high degree of dispersion again, further improved the compactness of ceramic post sintering coating, toughness and high temperature abrasion resistance have play a part important for the anti-stick grittiness that improves light-coloured coating.
Coating of the present invention is poured into a mould on some important lathe ironcastings, and the result shows, the surface quality with the ironcasting of the light-coloured coating cast of above-mentioned formulated obviously is better than traditional black graphite paint, has improved operating environment effectively.
The specific embodiment
Embodiment one
The light color cast iron paint of the compound aggregate of high alumina polycrystalline is to be that 95-98% ethanol 33.5% is hybridly prepared into by 30% high alumina matter powder, mullite powder 20%, magnesia powder 6%, ultra-fine pyroxene powder 8%, nanoscale aluminium powder 0.5%, rosin 1%, bentonite suspending agent 1% and concentration.
Embodiment two
The light color cast iron paint of the compound aggregate of high alumina polycrystalline is to be that 95-98% ethanol 30% is hybridly prepared into by high alumina matter powder 35%, mullite powder 15%, magnesia powder 3.5%, ultra-fine pyroxene powder 7%, nanoscale zirconium powder 3.5%, phenolic resins 2%, bentonite suspending agent 4% and concentration.
Embodiment three
The light color cast iron paint of the compound aggregate of high alumina polycrystalline is to be that 98% ethanol 40% is hybridly prepared into by 25% high alumina matter powder, mullite powder 10%, magnesia powder 8%, ultra-fine pyroxene powder 6.5%, nanoscale chromium powder 1.5%, rosin 3%, bentonite suspending agent 6% and concentration.
Percentage is weight percentage among above-mentioned three embodiment, and high alumina matter powder contains Al
2O
3Be 70-85%, ultra-fine pyroxene powder or lanthanum/strontium and rare earth granularity is 100-500 μ m.
Claims (4)
1, the light color cast iron paint of the compound aggregate of high alumina polycrystalline is characterized in that it being to be hybridly prepared into by high alumina matter powder 20-40%, mullite powder 10-25%, magnesia powder 3-10%, ultra-fine flux 6-10%, nucleus agent 0.5-3.5%, organic binder bond 1-3%, bentonite suspending agent 1-6% and solvent 30-40% by weight percentage; High alumina matter powder contains Al
2O
370-85%; Ultra-fine flux is ultra-fine pyroxene or lanthanum/strontium and rare earth class, and granularity is 100-500 μ m; Organic binder bond is rosin or resin; The nucleus agent is nanometer aluminum, zirconium, chromium ultrafine solids dusty material; Solvent is ethanol or isopropyl alcohol, concentration of alcohol 〉=95%, isopropyl alcohol concentration 〉=98%.
2, the light color cast iron paint of the compound aggregate of high alumina polycrystalline according to claim 1 is characterized in that by suspending agent 1% and concentration in 30% high alumina matter powder, mullite powder 20%, magnesia powder 6%, ultra-fine pyroxene powder 8%, nanoscale aluminium powder 0.5%, rosin 1%, the swelling being that 95-98% ethanol 33.5% is hybridly prepared into.
3, the light color cast iron paint of the compound aggregate of high alumina polycrystalline according to claim 1 is characterized in that by 35% high alumina matter powder, mullite powder 15%, magnesia powder 3.5%, ultra-fine pyroxene powder 7%, nanoscale zirconium powder 3.5%, phenolic resins 2%, bentonite suspending agent 4% and concentration being that 95-98% ethanol 30% is hybridly prepared into.
4, the light color cast iron paint of the compound aggregate of high alumina polycrystalline according to claim 1 is characterized in that by 25% high alumina matter powder, mullite powder 10%, magnesia powder 8%, ultra-fine pyroxene powder 6.5%, nanoscale chromium powder 1.5%, rosin 3%, bentonite suspending agent 6% and concentration being that 98% ethanol 40% is hybridly prepared into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100120997A CN100464895C (en) | 2007-07-13 | 2007-07-13 | Light-color cast iron paint with high aluminium polycrystalline composite aggreagte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100120997A CN100464895C (en) | 2007-07-13 | 2007-07-13 | Light-color cast iron paint with high aluminium polycrystalline composite aggreagte |
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| Publication Number | Publication Date |
|---|---|
| CN101088660A CN101088660A (en) | 2007-12-19 |
| CN100464895C true CN100464895C (en) | 2009-03-04 |
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| CNB2007100120997A Expired - Fee Related CN100464895C (en) | 2007-07-13 | 2007-07-13 | Light-color cast iron paint with high aluminium polycrystalline composite aggreagte |
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Families Citing this family (10)
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|---|---|---|---|---|
| CN101259517B (en) * | 2008-04-14 | 2010-06-09 | 戚建明 | Double-roller rolling strip steel machine side seal board surface recombination coating and its preparation method and spraying coating method |
| CN102049464B (en) * | 2011-01-26 | 2012-07-04 | 东风汽车有限公司 | Special coating for full mold casting and preparation method thereof |
| 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 |
| CN102989998B (en) * | 2012-12-25 | 2014-10-29 | 常州大学 | Chilling alcoholic-group coating absorbing heat by using melting, sublimation and vaporization of substances |
| CN103056287B (en) * | 2013-01-25 | 2014-11-26 | 南京信息工程大学 | Material for cast steel evaporative pattern and preparation method of material |
| CN103264140A (en) * | 2013-03-05 | 2013-08-28 | 南通华东油压科技有限公司 | Dedicated core coating for manufacturing walking machinery motor cover, manufacturing method and use method thereof |
| CN103302236B (en) * | 2013-06-20 | 2015-03-04 | 湖北工业大学 | Alcohol-based non-zirconium composite refractory aggregate spray paint for wet cast steel and preparation method thereof |
| CN103878299B (en) * | 2014-03-03 | 2016-11-02 | 珠海市斗门福联造型材料实业有限公司 | A kind of sintering exfoliated light color cast paint and preparation method thereof |
| CN104475669A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Anti-burn on casting coating and manufacturing method thereof |
| CN105750481B (en) * | 2016-03-31 | 2017-12-26 | 宁夏共享化工有限公司 | A kind of water based paint for preventing large-scale steel-casting orange peel defect |
Citations (5)
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|---|---|---|---|---|
| GB1179454A (en) * | 1967-03-31 | 1970-01-28 | Foseco Int | Treatment of Metal Casting Moulds |
| CN1006366B (en) * | 1986-01-04 | 1990-01-10 | 陕西机械学院 | Light-coloured coating for iron-casting core |
| CN1008977B (en) * | 1986-10-03 | 1990-08-01 | 刘汉生 | Water based iron casting paint |
| JP2000051995A (en) * | 1998-07-31 | 2000-02-22 | Asahi Tec Corp | Coating |
| CN1907596A (en) * | 2006-08-06 | 2007-02-07 | 古德 | Light color cast iron paint |
-
2007
- 2007-07-13 CN CNB2007100120997A patent/CN100464895C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1179454A (en) * | 1967-03-31 | 1970-01-28 | Foseco Int | Treatment of Metal Casting Moulds |
| CN1006366B (en) * | 1986-01-04 | 1990-01-10 | 陕西机械学院 | Light-coloured coating for iron-casting core |
| CN1008977B (en) * | 1986-10-03 | 1990-08-01 | 刘汉生 | Water based iron casting paint |
| JP2000051995A (en) * | 1998-07-31 | 2000-02-22 | Asahi Tec Corp | Coating |
| CN1907596A (en) * | 2006-08-06 | 2007-02-07 | 古德 | Light color cast iron paint |
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| CN101088660A (en) | 2007-12-19 |
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