CN101569919B - Water-based coating for lost foam cast steel - Google Patents

Water-based coating for lost foam cast steel Download PDF

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Publication number
CN101569919B
CN101569919B CN2009100160404A CN200910016040A CN101569919B CN 101569919 B CN101569919 B CN 101569919B CN 2009100160404 A CN2009100160404 A CN 2009100160404A CN 200910016040 A CN200910016040 A CN 200910016040A CN 101569919 B CN101569919 B CN 101569919B
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Prior art keywords
coating
lost foam
water
cast steel
portions
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Expired - Fee Related
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CN2009100160404A
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CN101569919A (en
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刘则斌
张传明
耿庆会
成学山
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Shandong Liquan Machinery Technology Co. Ltd.
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刘则斌
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Abstract

The invention belongs to the technical field of coating compositions for lost foam, is applicable to forming EPS foam pattern coatings of lost foam steel castings, and particularly discloses a water-based coating for lost foam cast steel. The water-based coating for the lost foam cast steel comprises the following components (calculated as the weight): 100 portions of quartz powder, 2 to 3 portions of lithium bentonite, 1 to 2 portions of white latex, 1 to 1.2 portions of sodium carboxymethyl cellulose, 2 to 3 portions of water soluble phenolic resin, 0.1 to 0.15 portion of aluminum powder, 0.08 portion of glass fiber, 0.02 to 0.03 portion of active agent, and 0.02 to 0.03 portion of defoaming agent. The coating ensures that the surface quality of castings is improved, meets the technical requirement of the castings, saves subsequent treatment procedures, improves production efficiency, improves the working environment of laborers, more importantly, eliminates the potential safety hazard during the subsequent use, and also improves the economic benefit of enterprises.

Description

Water-based coating for lost foam cast steel
Technical field
The invention belongs to the technical field of disappearance mould, be applicable to form lost foam cast steel spare EPS apperance coating, be specially a kind of water-based coating for lost foam cast steel with coating composition.
Background technology
Lost foam cast steel spare need be at the surface-coated coating of foam module in producing, the characteristics of coating directly have influence on the quality and the performance of steel-casting, the preparation of coating and drying are one of important steps that obtains premium casting, aborning, often occur by coating property instability or index incorrect and cause the casting quality instability, the phenomenon that percent defective rises, this has deepened people's cognitive-ability important to coating.Smelting process will be passed through processes such as pre-deoxidation, final deoxidizing in the Steel Castings, and stokehold circle cup specimen test deoxidation meets steel-making requirements in order fully.For satisfy the disappearance mould slow-fast-slow cast requires often to adopt converter-type ladle, the white mould of brushing coating need be through strict baking, but on foundry goods and the micropore existence that still has quantity not to wait of the corner of foundry goods, and this place's coating and foundry goods adhesion can not come off voluntarily, so just need be to the cast(ing) surface narrow examination in the subsequent treatment operation, soldering is implemented in the position polishing that has micropore to exist, polishing again after the soldering, to carry out earlier in case of necessity being incubated the welding stress that causes because of welding to eliminate again after the annealing in process soldering, if handle bad because of welding material difference and internal stress existence, for the foundry goods use hides some dangers for.The defective of its existence is, often there is micropore on lost foam casting cast carbon steel surface, influences surface quality, and for subsequent treatment work makes troubles, polishing and processing procedure are wasteful, increase cost, and is dangerous in the follow-up use of prior thing, buries potential safety hazard; Bonding coat is peeled off difficulty, increases working strength of workers, and aggravating laboring environment, increase disposal costs have reduced production efficiency; Crackle is arranged after the coated and dried, cause the cast(ing) surface flash, the subsequent treatment labor strength is big, work situation abominable, increase disposal costs.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of steel-casting total quality good water-based coating for lost foam cast steel at the defective of above-mentioned existence.Make surface quality of continuous castings improve after applying this coating, satisfied the specification requirement of foundry goods, saved the subsequent treatment operation, enhance productivity, and improved labourer's working environment, and the more important thing is the potential safety hazard of having eliminated in the follow-up use, also improved economic benefit of enterprises.
Water-based coating for lost foam cast steel of the present invention, comprise following component by weight, 100 parts of silica flours, lithium bentonite 2-3 part, white glue with vinyl 1-2 part, sodium carboxymethylcellulose 1-1.2 part, water soluble phenol resin 2-3 part, aluminium powder 0.1-0.15 part, 0.08 part in glass fibre, activating agent 0.02-0.03 part, defoamer 0.02-0.03 part.
The preferred version of described coating is that it consists of following component by weight, 100 parts of silica flours, 3 parts of lithium bentonites, 1 part of white glue with vinyl, 1.2 parts of sodium carboxymethylcelluloses, 2.5 parts of water soluble phenol resins, 0.1 part of aluminium powder, 0.08 part in glass fibre, 0.02 part of activating agent, 0.02 part of defoamer.
Wherein, described activating agent is one or more of polyoxyethylated alkyl alcohol (OP-10) or tween (T-80) or APEO n-butanol (JFC).Described defoamer is one or more of n-butanol or n-octyl alcohol or n-amyl alcohol.
Above-mentioned particulate material is selected the 270-350 order for use.
The preparation method of coating of the present invention is above-mentioned raw materials to be mixed to stir obtaining product with water.
Beneficial effect of the present invention is, in coating, add aluminium powder, aluminium powder reacts, remove oxygen that produces in the coating and the oxide that contacts formation with molten steel, prevent to form pore and the oxide reduction is generated resistant to elevated temperatures aluminium oxide, prevent iron oxide and quartzy generation silicate and steel-casting adhesion, add glass fibre and prevent that coating is dry and cracked.Apply the lost foam cast steel spare that this coating casting obtains, the steel casting surface micropore is eliminated, and cast(ing) surface is bright and clean, and coating shedding is good behind the casting pouring, very easily cleaning, smooth bright and clean, coating is crackle not, eliminate the casting fin flash, saved subsequent handling, improved production efficiency greatly.The present invention combines by aluminium powder and glass fibre, surface micropore problem, coating adhesion problem and the coating dry and crack problems of steel-casting have been solved, make the steel moulder's paint performance improve greatly, steel part after the casting need not subsequent treatment, has saved the labour greatly, increases work efficiency, production cost reduces greatly, and for the workman provides good working environment, of paramount importance is that the follow-up potential safety hazard of steel-casting disappears.
In addition, the coating that contains aluminium can only be used on first limit of Bai Mo brushing, thickness 0.2~0.3mm, and 100 kilograms steel-casting coating needs 0.2 yuan of aluminium powder, accounts for 0.03% of foundry goods value, and needs the consumption of subsequent handling on average to account for 0.5% of foundry goods value in the past.
In a word, coating of the present invention, make surface quality of continuous castings improve, satisfied the specification requirement of foundry goods, do not have repair welding, need not specially treated, save the subsequent treatment operation, improved production efficiency, improved labourer's working environment, the more important thing is the potential safety hazard of having eliminated in the follow-up use, this has just improved economic benefit of enterprises greatly.
The specific embodiment
Below by specific embodiment technical scheme of the present invention is described in detail.
Embodiment 1 anode steel claw material 200-400W (international standard)
100 parts of silica flours, 3 parts of lithium bentonites, 2 parts of white glue with vinyl, 1.2 parts of sodium carboxymethylcelluloses, 3 parts of water soluble phenol resins, 0.15 part of aluminium powder, 0.08 part in glass fibre, 0.02 part of polyoxyethylated alkyl alcohol (OP-10), 0.03 part of n-butanol mixes stirring with above-mentioned raw materials and obtains product with water.After above-mentioned coating applies, produce in enormous quantities.
Embodiment 2 turbine body material ZG35 (old mark)
100 parts of silica flours, 2 parts of lithium bentonites, 2 parts of white glue with vinyl, 1 part of sodium carboxymethylcellulose, 2 parts of water soluble phenol resins, 0.1 part of aluminium powder, 0.08 part in glass fibre, 0.02 part of tween, 0.03 part of n-amyl alcohol mixes stirring with above-mentioned raw materials and obtains product with water.
The characteristics of this coating are: as preferred coating method, this coating is as first pass coating (general foundry goods brushing 2-3 time).Molten steel contacts with coating and is about to solidify, be last one critical point of eliminating defective, with coating that molten steel directly contacts in add aluminium element, emit not wetting and aluminium oxide that fusing point is high of heat generation simultaneously from the oxygen species of each side and the aluminium element generation reduction reaction in the coating in the molten steel in the casting process with molten steel, reduction is tapped a blast furnace and alloying element further guarantees surface alloy content, reduce the micropore of separating out formation simultaneously because of oxygen species, because emitting heat, this process further offsets the thermal loss that the EPS gasification causes again, guarantee the flowability of molten steel, consume iron oxide quantity in the molten steel simultaneously and prevent SiO in itself and the coating 2The formation chemical adhesive reacts.
The brushing process of this coating can adopt dip coating, spread coating.Its coating method can for, brush this coating on one side, thickness 0.4-0.6 millimeter in the foundry goods Foam Pattern, other conventional coating brushing 2 limits are used in oven dry again, and each is all over all drying, make pourable apperance, on the basis of ensuring the quality of products, can further reduce production costs.

Claims (4)

1. water-based coating for lost foam cast steel, comprise following component by weight, 100 parts of silica flours, lithium bentonite 2-3 part, white glue with vinyl 1-2 part, sodium carboxymethylcellulose 1-1.2 part, water soluble phenol resin 2-3 part, aluminium powder 0.1-0.15 part, 0.08 part in glass fibre, activating agent 0.02-0.03 part, defoamer 0.02-0.03 part.
2. water-based coating for lost foam cast steel according to claim 1, it consists of following component by weight, 100 parts of silica flours, 3 parts of lithium bentonites, 1 part of white glue with vinyl, 1.2 parts of sodium carboxymethylcelluloses, 2.5 parts of water soluble phenol resins, 0.1 part of aluminium powder, 0.08 part in glass fibre, 0.02 part of activating agent, 0.02 part of defoamer.
3. water-based coating for lost foam cast steel according to claim 1 and 2 is characterized in that, described activating agent is one or more in polyoxyethylated alkyl alcohol, tween, the APEO n-butanol.
4. water-based coating for lost foam cast steel according to claim 1 and 2 is characterized in that, described defoamer is one or more in n-butanol, n-octyl alcohol, the n-amyl alcohol.
CN2009100160404A 2009-06-10 2009-06-10 Water-based coating for lost foam cast steel Expired - Fee Related CN101569919B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2009100160404A CN101569919B (en) 2009-06-10 2009-06-10 Water-based coating for lost foam cast steel

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CN101569919B true CN101569919B (en) 2010-12-01

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102009123B (en) * 2010-12-14 2013-05-22 青岛顺联集装箱部件制造有限公司 Automobile cross beam lost foam as well as manufacturing and using method thereof
CN102240776A (en) * 2011-07-15 2011-11-16 浙江宸宇重工有限公司 Coating for lost mould cast steel and manufacture method thereof
CN102500744B (en) * 2011-11-26 2013-04-17 山西华尔动力机械有限公司 Coating for lost foam casting of engine cylinder blocks and preparing method thereof
CN102836961B (en) * 2012-10-09 2014-11-05 嘉禾巨人机床有限公司 Lost foam coating for large casting and preparation method of lost foam coating
CN105312487A (en) * 2014-07-28 2016-02-10 山东蒙凌工程机械股份有限公司 Water-based paint for full mold and preparation method and using method of water-based paint
CN104673046B (en) * 2015-03-12 2017-06-27 湖南创元新材料有限公司 Anode steel claw graphite-based masking liquid
CN104889315A (en) * 2015-06-18 2015-09-09 山西威龙铁路机车制动配件制造有限公司 Water-based coating for lost foam casting and preparation method of coating
CN105363992A (en) * 2015-10-21 2016-03-02 和县科嘉阀门铸造有限公司 Valve lost foam casting coating
CN105478659A (en) * 2015-12-15 2016-04-13 六安万邦机械科技有限公司 Formula of evaporative pattern casting model coating paint
CN105436399A (en) * 2015-12-15 2016-03-30 六安万邦机械科技有限公司 Manufacturing technology of lost foam mold model coating

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1196282A (en) * 1997-04-11 1998-10-21 周清运 Coating for dispellable mould casting
CN1375365A (en) * 2002-02-04 2002-10-23 黄述哲 Water-base paint specially for disappearing cast mold
CN101428329A (en) * 2008-12-06 2009-05-13 华中科技大学 Special-purpose additive for powder paint for lost foam casting

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1196282A (en) * 1997-04-11 1998-10-21 周清运 Coating for dispellable mould casting
CN1375365A (en) * 2002-02-04 2002-10-23 黄述哲 Water-base paint specially for disappearing cast mold
CN101428329A (en) * 2008-12-06 2009-05-13 华中科技大学 Special-purpose additive for powder paint for lost foam casting

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