CN103084540B - A kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel - Google Patents
A kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel Download PDFInfo
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- CN103084540B CN103084540B CN201310034751.0A CN201310034751A CN103084540B CN 103084540 B CN103084540 B CN 103084540B CN 201310034751 A CN201310034751 A CN 201310034751A CN 103084540 B CN103084540 B CN 103084540B
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Abstract
The invention discloses a kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel, by refractory material, suspending agent, other auxiliary agent and water composition, the percentage by weight proportioning of described coating is refractory material 60 ~ 70%, suspending agent 3 ~ 8%, other auxiliary agent 2 ~ 5%, all the other components are water, described refractory material is bauxite, great English powder, magnesium powder, silica flour, brown alundum powder and white alundum powder composition, granularity and mass percent proportioning are-270 order ~+320 orders 78%,-200 order ~+270 orders 15%,-100 order ~+200 orders 5%, + 100 order≤2%,-100 order ~+200 order 5% and+100 order≤2%, described suspending agent is the mass ratio of sodium bentonite in powder and the sodium cellulose glycolate aqueous solution is 1:1, other auxiliary agent described is benzene emulsion or sulfate.Use the method to simplify production craft step relative to other coating, effectively improve the intensity of coating, the dope layer decreased due to bubbles model easily comes off and forms pigment finish leather in molten steel pouring course, causes the defect such as foundry goods bark pocket, slag inclusion, scab.
Description
Technical field
The present invention relates to lost foam casting process, belong to casting technique field, particularly relate to a kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel.
Background technology
People are usually referred to as lost foam casting and are also called dry sand vacuum full mould casting, be referred to as EPC abroad, it is current one of state-of-the-art casting technique in the world, vibration molding in drystone sand is directly embedded in paraffin or polyethylene foamed (being usually benzene plate) analogue formation, form benzene plate entity sand mold type molds, when in this solid mold during pouring molten iron, polystyrene burns gasifies, molten iron is full of the space occupied by polystyrene, forms the foundry goods identical with model after solidifying cooling.
But its weak point is: first, the free carbon richness produced after polystyrene burns is amassed and form carbon distribution on cast-internal or cast(ing) surface, causes finished surface to scrap because of carbon distribution defect; Secondly, form pigment finish leather because benzene template dope layer easily comes off in molten steel pouring course, cause foundry goods bark pocket, slag inclusion, scab etc. to be difficult to the casting flaw overcome; In addition, easily produce iron burnt-in sand, rise the defect such as case, distortion, and surface quality of continuous castings is poor relative to die model casting.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of scrappage that both can reduce cast member, cast member after simultaneously also can reducing sintering is peeled off gradually, more cost-saving, improve the lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel of production efficiency.
For achieving the above object, the technology used in the present invention solution is: a kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel, is made up of refractory material, suspending agent, other auxiliary agent and water;
Further instruction, the percentage by weight proportioning of described coating is: refractory material 60 ~ 70%, suspending agent 3 ~ 8%, other auxiliary agent 2 ~ 5%, and all the other components are water;
Described refractory material is: bauxite, great English powder, magnesium powder, silica flour, brown alundum powder and white alundum powder composition, granularity and mass percent proportioning are: bauxite-270 order ~+320 order 78%, great English powder-200 order ~+270 order 15%, magnesium powder-100 order ~+200 order 5%, silica flour+100 order≤2%, brown alundum powder-100 order ~+200 order 5%, white alundum powder+100 order≤2%, wherein brown alundum powder with magnesium vanadine for raw material through 2000 DEG C ~ 2400 DEG C pyrolytic semltings obtain, white jade steel powder forms through electric smelting recrystallization with alumina powder, be applicable to heat resisting steel, the evaporative pattern of the high temperature cast such as steel alloy uses, the great English chalk line coefficient of expansion is little, heat is shaken good stability, refractoriness is high and when high temperature to most of alloy not chemically reactive, the granularity of all the components and distribution of particle sizes are the key factors affecting coating density and gas permeability, particularly lost foam paint, material impact can have been discharged smoothly by coating to the thermal decomposition product of foamed coating model in sintering process,
Described suspending agent is: the mass ratio of sodium bentonite in powder and the sodium cellulose glycolate aqueous solution is 1:1;
Other auxiliary agent described is: benzene emulsion or sulfate;
The density of described coating is 1.5 ~ 2.2g/cm3, gas forming amount≤15ml/g, and within 24 hours, suspension is 99%.
Use principle of the present invention is: steeped after being stirred by coating and be coated on bubbles model, and coat is 3 ~ 5 layers, specifically depending on foundry goods size, finally neat for the bubbles model coated putting is dried on the top of the shelf, and bake out temperature is 50 ~ 65 DEG C.
The present invention has following beneficial effect in sum: the present invention simplifies production craft step relative to other coating, the intensity of effective raising coating, the dope layer decreased due to bubbles model easily comes off and forms pigment finish leather in molten steel pouring course, causes the defect such as foundry goods bark pocket, slag inclusion, scab.
Detailed description of the invention
For a lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel, be made up of refractory material, suspending agent, other auxiliary agent and water;
Further instruction, the percentage by weight proportioning of described coating is: refractory material 60 ~ 70%, suspending agent 3 ~ 8%, other auxiliary agent 2 ~ 5%, and all the other components are water;
Described refractory material is: bauxite, great English powder, magnesium powder, silica flour, brown alundum powder and white alundum powder composition, granularity and mass percent proportioning are: bauxite-270 order ~+320 order 78%, great English powder-200 order ~+270 order 15%, magnesium powder-100 order ~+200 order 5%, silica flour+100 order≤2%, brown alundum powder-100 order ~+200 order 5%, white alundum powder+100 order≤2%, wherein brown alundum powder with magnesium vanadine for raw material through 2000 DEG C ~ 2400 DEG C pyrolytic semltings obtain, white jade steel powder forms through electric smelting recrystallization with alumina powder, be applicable to heat resisting steel, the evaporative pattern of the high temperature cast such as steel alloy uses, the great English chalk line coefficient of expansion is little, heat is shaken good stability, refractoriness is high and when high temperature to most of alloy not chemically reactive, the granularity of all the components and distribution of particle sizes are the key factors affecting coating density and gas permeability, particularly lost foam paint, material impact can have been discharged smoothly by coating to the thermal decomposition product of foamed coating model in sintering process,
Described suspending agent is: the mass ratio of sodium bentonite in powder and the sodium cellulose glycolate aqueous solution is 1:1;
Other auxiliary agent described is: benzene emulsion or sulfate;
The density of described coating is 1.5 ~ 2.2g/cm3, gas forming amount≤15ml/g, and within 24 hours, suspension is 99%.
Use principle of the present invention is: steeped after being stirred by coating and be coated on bubbles model, and coat is 3 ~ 5 layers, specifically depending on foundry goods size, finally neat for the bubbles model coated putting is dried on the top of the shelf, and bake out temperature is 50 ~ 65 DEG C.
Last it is noted that above embodiment only in order to illustrate the present invention and and unrestricted technical scheme described in the invention; Therefore, although this description with reference to each above-mentioned embodiment to present invention has been detailed description, those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent to replace; And all do not depart from technical scheme and the improvement thereof of invention spirit and scope, it all should be encompassed in the middle of right of the present invention.
Claims (3)
1. the lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel, by refractory material, suspending agent, other auxiliary agent and water composition, it is characterized in that being: the percentage by weight proportioning of described coating is refractory material 60 ~ 70%, suspending agent 3 ~ 8%, other auxiliary agent 2 ~ 5%, all the other components are water, described refractory material is bauxite, great English powder, magnesium powder, silica flour, brown alundum powder and white alundum powder composition, granularity and mass percent proportioning are bauxite-270 order ~+320 order 78%, great English powder-200 order ~+270 order 15%, magnesium powder-100 order ~+200 order 5%, silica flour+100 order≤2%, brown alundum powder-100 order ~+200 order 5%, white alundum powder+100 order≤2%, described suspending agent is the mass ratio of sodium bentonite in powder and the sodium cellulose glycolate aqueous solution is 1:1, other auxiliary agent described is benzene emulsion or sulfate.
2. a kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel according to claim 1, it is characterized in that being: the density of described coating is 1.5 ~ 2.2g/cm3, gas forming amount≤15ml/g, within 24 hours, suspension is 99%.
3. a kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel according to claim 1, it is characterized in that being: described paint layer is 3 ~ 5 layers, the bake out temperature of the bubbles model coated is 50-65 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034751.0A CN103084540B (en) | 2013-01-30 | 2013-01-30 | A kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310034751.0A CN103084540B (en) | 2013-01-30 | 2013-01-30 | A kind of lost foam paint compound method for casting heat-resistant steel or wear-resisting alloy steel |
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| CN103084540A CN103084540A (en) | 2013-05-08 |
| CN103084540B true CN103084540B (en) | 2015-12-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286258B (en) * | 2013-06-24 | 2015-08-19 | 朱兰英 | A kind of low cost, high-performance lost foam casting coating |
| KR101929134B1 (en) * | 2014-08-18 | 2018-12-13 | 가부시키가이샤 고베 세이코쇼 | Lost-foam casting method |
| CN105268911B (en) * | 2015-10-27 | 2017-12-19 | 宁夏共享化工有限公司 | A kind of highly-breathable lost foam paint and preparation method thereof |
| CN105964899A (en) * | 2016-07-20 | 2016-09-28 | 张耀忠 | Water-based casting coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE69911928T2 (en) * | 1999-06-14 | 2004-07-22 | General Motors Corp., Detroit | Removal of residues of the lost casting model from a casting |
| JP3871952B2 (en) * | 2002-04-08 | 2007-01-24 | 花王株式会社 | Vanishing model casting method |
| CN101497105B (en) * | 2009-03-12 | 2011-08-10 | 深圳市景鼎现代科技有限公司 | Cast form water borne coating and technique for preparing the same |
| CN102407275B (en) * | 2011-04-25 | 2013-04-10 | 湖北工业大学 | Expendable pattern casting (EPC) molding shell paint for casting steel and preparation method thereof |
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Granted publication date: 20151223 Termination date: 20190130 |