CN101982254A - Yellow soil-base sinter-strippable casting coating and preparation method thereof - Google Patents
Yellow soil-base sinter-strippable casting coating and preparation method thereof Download PDFInfo
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- CN101982254A CN101982254A CN2010105555605A CN201010555560A CN101982254A CN 101982254 A CN101982254 A CN 101982254A CN 2010105555605 A CN2010105555605 A CN 2010105555605A CN 201010555560 A CN201010555560 A CN 201010555560A CN 101982254 A CN101982254 A CN 101982254A
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Abstract
The invention relates to a yellow soil-base sinter-strippable casting coating and a preparation method thereof. The casting coating comprises powder composed of yellow soil powder, lead zinc slag powder and bentonite at the weight ratio of (6-8):(2-4):(0.5-1.5), and silica sol which accounts for 3%-6% of the total weight of the powder. The preparation method comprises the following steps: firstly mixing the yellow soil powder with the lead zinc slag powder proportionally; roasting the mixed powder at the temperature of 800-1200 DEG C; adding the bentonite and the silica sol proportionally after the powder is cooled; and adding water for stirring to obtain the yellow soil-base sinter-strippable casting coating. The coating in the invention has good suspension property and can form strippable compact sinter skin after being cast; the obtained casting has the advantages of bright and clean surface, low roughness, high dimensional accuracy and good quality; and the preparation method has the advantages of simple process, low price and wide sources of raw materials, and good application prospect.
Description
Technical field
The invention belongs to cast paint and preparation field thereof, exfoliated cast paint of particularly a kind of yellow earth soil matrix sintering and preparation method thereof.
Background technology
Along with improving constantly of national economy and human being's production living standard, the dimensional accuracy of foundry goods and surface quality are required also improving constantly.In sand casting process, modal casting defect is scab, and uses coating can solve this defective preferably, and applying coating forms separation layer one at mold cavity surface, can prevent that foundry goods from producing defectives such as scab.
Refractory powder is the element in the cast paint, refractory powder silica flour commonly used, zirconium English powder, chromite powder etc.Coating is a kind of colloidal dispersion before entering duty, therefore needing needs to add the uniformity of assurance coating such as suspending agent, binding agent and make coating have certain cohesive force in coating, good suspension can also guarantee good paintability except the uniformity that can guarantee coating.Suspending agent commonly used has bentonite, attapulgite, sodium carboxymethylcellulose (CMC) etc., and common binding agent has clay, waterglass, Ludox etc.The coating of high-quality also will possess the good penetration ability, and therefore the hole of energy complete filling die cavity requires the granularity of powder to want enough thin.The main effect of coating vehicles is materials such as delivery refractory powder, binding agent, suspending agent, so that can according to the classification of type of carrier, mainly contain water and organic solvent with applying coating in mo(U)ld face, when being carrier with water, the method for removal is oven dry or dries; During as carrier, the method for removal is to burn with the fire point, yet can produce a series of gas after alcohols is lighted with alcohols.
Summary of the invention
Technical problem to be solved by this invention provides exfoliated cast paint of a kind of yellow earth soil matrix sintering and preparation method thereof, this coating possesses good suspension, cast back coating forms the dense sintering shell of easily peeling off, the cast(ing) surface that obtains is bright and clean, roughness is low, the casting dimension accuracy height, casting quality is good; Preparation method's technology is simple, and cheap, the wide material sources of cost of material have a good application prospect.
The exfoliated cast paint of a kind of yellow earth soil matrix sintering of the present invention, its component comprises: by weight ratio is the powder that the yellow soil powder of 6-8: 2-4: 0.5-1.5, plumbous zinc ore ground-slag, bentonite are formed, and the Ludox that accounts for powder gross weight 3%-6%.
The granularity of described yellow soil powder is the 270-350 order, and the granularity of plumbous zinc ore ground-slag is the 270-350 order, and bentonitic granularity is the 180-220 order.
The preparation method of the exfoliated cast paint of a kind of yellow earth soil matrix sintering of the present invention comprises:
(1) yellow soil powder, plumbous zinc ore ground-slag are mixed the back by 6-8: 2-4 and carry out roasting, cooling in 800 ℃-1200 ℃;
(2) be the bentonite and the Ludox that accounts for powder gross weight 3%-6% of 0.5-1.5: 6-8 in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture, adding with yellow soil powder weight ratio, adding water stirs, promptly, add a spot of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase an amount of water subsequently, can improve the rotating speed of mixer this moment, after treating that all raw materials stir, keep the rotating speed of mixer to continue to stir 15 minutes, promptly.
Coating of the present invention is except the fundamental property that satisfies cast paint, this coating can also be under pouring temperature 50 ℃ of-100 ℃ of molten sinterings, coating of the present invention sintering in casting process, pore can be shielded and molding sand penetrates into cast(ing) surface, form fine and close sinterskin in cooling procedure, guaranteed casting dimension accuracy, the sinterskin of formation is being peeled off cast(ing) surface after the cooling fully easily, prevent scab, improved surface quality of continuous castings; Good brushability is in use arranged, and foundry goods can improve the production efficiency of foundry goods in shake out taking-up under the higher temperature.
Beneficial effect
(1) coating of the present invention possesses good suspension, in use can well guarantee the uniformity of coating, convenient storage;
(2) cast back coating forms the dense sintering shell of easily peeling off, and the cast(ing) surface of acquisition is bright and clean, and roughness is low, the casting dimension accuracy height, and casting quality is good;
(3) preparation method's technology of the present invention is simple, and cheap, the wide material sources of cost of material have a good application prospect.
Description of drawings
Fig. 1 is the pouring cast part pictorial diagram of embodiment 1;
Fig. 2 is the pouring cast part pictorial diagram of embodiment 2.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
(1) yellow soil powder, plumbous zinc ore ground-slag were mixed the back by weight 3: 1 and carry out roasting, cooling in 800 ℃;
(2) be 1: 12 bentonite and the Ludox that accounts for powder gross weight 3% in adding in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture and yellow soil powder weight ratio, add a spot of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase an amount of water subsequently, can improve the rotating speed of mixer this moment, treat that all raw materials stir after, keep the rotating speed of mixer to continue to stir 15 minutes, promptly.
With the coating brushing that makes mold cavity surface at φ 150mm * 20mm, the coating brushing is functional, coating can be cmpletely the hole of filling mold cavity surface, pour into a mould according to the method for normal cast cast iron being coated with the die cavity oven dry back that is brushed with coating, pouring temperature is 1300 ℃-1500 ℃, shake out is found behind molten steel solidification, and coating is sintering all, and the sinterskin of formation is peeled off cast(ing) surface in the process of foundry goods cooling.Cast(ing) surface sinterskin cleaning back is found that cast(ing) surface is bright and clean, and roughness is lower, scab phenomenon do not occur.The cast(ing) surface that is formed by coating is shown in figure one.
Embodiment 2
(1) yellow soil powder, plumbous zinc ore ground-slag were mixed the back by weight 2: 1 and carry out roasting, cooling in 1200 ℃;
(2) be 1.5: 8 bentonite and the silicon gel that accounts for powder gross weight 6% in adding in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture and yellow soil powder weight ratio, add a spot of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase an amount of water subsequently, can improve the rotating speed of mixer this moment, treat that all raw materials stir after, keep the rotating speed of mixer to continue to stir 15 minutes, promptly.
The coating brushing that makes on the core surface of φ 80mm * 150mm, will coating be poured into a mould after through oven dry, and the cast specimen size is: external diameter φ 150mm, internal diameter φ 80mm, height 150mm.Shake out is found behind molten steel solidification, and coating is sintering all, and the sinterskin of formation is peeled off cast(ing) surface in the process of foundry goods cooling.Cast(ing) surface sinterskin cleaning back is found that cast(ing) surface is bright and clean, and roughness is lower, scab phenomenon do not occur.The foundry goods inner surface that is formed by coating is shown in figure two.
Claims (5)
1. exfoliated cast paint of yellow earth soil matrix sintering, its component comprises: by weight ratio is the powder that the yellow soil powder of 6-8: 2-4: 0.5-1.5, plumbous zinc ore ground-slag, bentonite are formed, and the Ludox that accounts for powder gross weight 3%-6%.
2. the exfoliated cast paint of a kind of yellow earth soil matrix sintering according to claim 1, it is characterized in that: the granularity of described yellow soil powder is the 270-350 order.
3. the exfoliated cast paint of a kind of yellow earth soil matrix sintering according to claim 1, it is characterized in that: the granularity of described plumbous zinc ore ground-slag is the 270-350 order.
4. the exfoliated cast paint of a kind of yellow earth soil matrix sintering according to claim 1, it is characterized in that: described bentonitic granularity is the 180-220 order.
5. the preparation method of the exfoliated cast paint of yellow earth soil matrix sintering comprises:
(1) yellow soil powder, plumbous zinc ore ground-slag are mixed the back by 6-8: 2-4 and carry out roasting, cooling in 800 ℃-1200 ℃;
(2) be the bentonite and the Ludox that accounts for powder gross weight 3%-6% of 0.5-1.5: 6-8 in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture, adding, add water and stir, promptly with yellow soil powder weight ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010555560.5A CN101982254B (en) | 2010-11-23 | 2010-11-23 | Yellow soil-base sinter-strippable casting coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010555560.5A CN101982254B (en) | 2010-11-23 | 2010-11-23 | Yellow soil-base sinter-strippable casting coating and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101982254A true CN101982254A (en) | 2011-03-02 |
| CN101982254B CN101982254B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010555560.5A Expired - Fee Related CN101982254B (en) | 2010-11-23 | 2010-11-23 | Yellow soil-base sinter-strippable casting coating and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414015A (en) * | 2017-08-08 | 2017-12-01 | 合肥正明机械有限公司 | A kind of method for improving Iron Casting Surface quality |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082466A (en) * | 1993-02-15 | 1994-02-23 | 大连冷冻机厂 | Resin sand mould (core) or cast part type (core) is used water based paint |
| CN1785551A (en) * | 2005-12-20 | 2006-06-14 | 金啸海 | Moulding sand used for casting and its preparation method |
-
2010
- 2010-11-23 CN CN201010555560.5A patent/CN101982254B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082466A (en) * | 1993-02-15 | 1994-02-23 | 大连冷冻机厂 | Resin sand mould (core) or cast part type (core) is used water based paint |
| CN1785551A (en) * | 2005-12-20 | 2006-06-14 | 金啸海 | Moulding sand used for casting and its preparation method |
Non-Patent Citations (3)
| Title |
|---|
| 《机械工程学报》 20100630 杨振刚等 天然粘土砂烧结对铸铁件表面质量的影响 65-69 1-5 第46卷, 第12期 * |
| 杨振刚等: "天然粘土砂烧结对铸铁件表面质量的影响", 《机械工程学报》, vol. 46, no. 12, 30 June 2010 (2010-06-30), pages 65 - 69 * |
| 林知勋等: "连域膨润土的不同钠化工艺对铸造型砂强度的影响", 《福建地质》, vol. 8, no. 1, 31 December 1989 (1989-12-31), pages 63 - 71 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414015A (en) * | 2017-08-08 | 2017-12-01 | 合肥正明机械有限公司 | A kind of method for improving Iron Casting Surface quality |
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| CN101982254B (en) | 2014-04-02 |
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Granted publication date: 20140402 Termination date: 20161123 |