CN101982254B - 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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- CN101982254B CN101982254B CN201010555560.5A CN201010555560A CN101982254B CN 101982254 B CN101982254 B CN 101982254B CN 201010555560 A CN201010555560 A CN 201010555560A CN 101982254 B CN101982254 B CN 101982254B
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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, particularly a kind of yellow soil-base sinter-strippable casting coating 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 preferably this defect, and applying coating forms separation layer one at mold cavity surface, can prevent that foundry goods from producing the defects such as scab.
Refractory powder is the element in cast paint, conventional refractory powder silica flour, zirconium English powder, chromite powder etc.Coating is a kind of colloidal dispersion before entering duty, therefore need in coating, need add the uniformity of the assurance coating such as suspending agent, binding agent and make coating there is certain cohesive force, good suspension the uniformity of coating, can also ensure good paintability except guaranteeing.Conventional suspending agent has bentonite, attapulgite, sodium carboxymethylcellulose (CMC) etc., and common binding agent has clay, waterglass, Ludox etc.The coating of high-quality also will possess good penetrating power, can fill the hole of die cavity completely, therefore requires the granularity of powder to want enough thin.The Main Function of coating vehicles is the materials such as delivery refractory powder, binding agent, suspending agent, to can according to the classification of type of carrier, mainly contain water and organic solvent by applying coating in mo(U)ld face, take water during as carrier, and the method for removal is dry or dry; Using alcohols during as carrier, and the method for removal is to burn with fire point, yet alcohols can produce a series of gas after lighting.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of yellow soil-base sinter-strippable casting coating and preparation method thereof, this coating possesses good suspension, after cast, coating forms the dense sintering shell of easily peeling off, the cast(ing) surface obtaining is bright and clean, roughness is low, casting dimension accuracy is high, and casting quality is good; Preparation method's technique is simple, and cost of material is cheap, wide material sources, has a good application prospect.
A kind of yellow soil-base sinter-strippable casting coating of the present invention, its component comprises: by weight ratio, be the powder that the yellow soil powder of 6-8: 2-4: 0.5-1.5, plumbous zinc ore ground-slag, bentonite form, and the Ludox that accounts for powder gross weight 3%-6%.
The granularity of described yellow soil powder is 270-350 order, and the granularity of plumbous zinc ore ground-slag is 270-350 order, and bentonitic granularity is 180-220 order.
The preparation method of a kind of yellow soil-base sinter-strippable casting coating of the present invention, comprising:
(1) after being mixed by 6-8: 2-4, yellow soil powder, plumbous zinc ore ground-slag carry out roasting in 800 ℃-1200 ℃, and cooling;
(2) adding with yellow soil powder weight ratio in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture, be the bentonite of 0.5-1.5: 6-8 and the Ludox that accounts for powder gross weight 3%-6%, adding water stirs, obtain, add a small amount of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase subsequently appropriate water, now can improve the rotating speed of mixer, after all raw materials stir, keep the rotating speed of mixer to continue to stir 15 minutes, obtain.
Coating of the present invention is except meeting the fundamental property of 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, in cooling procedure, form fine and close sinterskin, guaranteed casting dimension accuracy, the sinterskin of formation is at the complete cooling rear cast(ing) surface of easily peeling off, prevent scab, improved surface quality of continuous castings; In use have good brushability, and foundry goods can, in shake out taking-up under higher temperature, improve the production efficiency of foundry goods.
beneficial effect
(1) coating of the present invention possesses good suspension, in use can well guarantee the uniformity of coating, convenient storage;
(2) after cast, 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, and casting dimension accuracy is high, and casting quality is good;
(3) preparation method's technique of the present invention is simple, and cost of material is cheap, wide material sources, has a good application prospect.
Accompanying drawing explanation
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 are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
(1) after being mixed by weight 3: 1, yellow soil powder, plumbous zinc ore ground-slag carry out roasting in 800 ℃, and cooling;
(2) at bentonite that to add with yellow soil powder weight ratio in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture be 1: 12 with account for the Ludox of powder gross weight 3%, add a small amount of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase subsequently appropriate water, now can improve the rotating speed of mixer, after all raw materials stir, keep the rotating speed of mixer to continue to stir 15 minutes, obtain.
Mold cavity surface by the coating brushing making at φ 150mm * 20mm, coating brushing is functional, coating can be cmpletely the hole of filling mold cavity surface, the die cavity that painting is brushed with to coating is poured into a mould according to the method for normal cast cast iron after drying, pouring temperature is 1300 ℃-1500 ℃, after molten steel solidification, shake out is found, coating is sintering all, and the sinterskin of formation is peeled off cast(ing) surface in the cooling process of foundry goods.To after the cleaning of cast(ing) surface sinterskin, find, cast(ing) surface is bright and clean, and roughness is lower, does not occur scab phenomenon.By the cast(ing) surface of coating formation as shown in figure mono-.
Embodiment 2
(1) after being mixed by weight 2: 1, yellow soil powder, plumbous zinc ore ground-slag carry out roasting in 1200 ℃, and cooling;
(2) at bentonite that to add with yellow soil powder weight ratio in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture be 1.5: 8 with account for the silicon gel of powder gross weight 6%, add a small amount of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase subsequently appropriate water, now can improve the rotating speed of mixer, after all raw materials stir, keep the rotating speed of mixer to continue to stir 15 minutes, obtain.
Pour into a mould coating after drying on core surface by the coating brushing making at φ 80mm * 150mm, and cast specimen size is: external diameter φ 150mm, internal diameter φ 80mm, height 150mm.After molten steel solidification, shake out is found, coating is sintering all, and the sinterskin of formation is peeled off cast(ing) surface in the cooling process of foundry goods.To after the cleaning of cast(ing) surface sinterskin, find, cast(ing) surface is bright and clean, and roughness is lower, does not occur scab phenomenon.By the foundry goods inner surface of coating formation as shown in Figure 2.
Claims (1)
1. a preparation method for yellow soil-base sinter-strippable casting coating, comprising:
(1) after being mixed by weight 3:1, yellow soil powder, plumbous zinc ore ground-slag carry out roasting in 800 ℃, and cooling;
(2) at bentonite that to add with yellow soil powder weight ratio in roasting, cooled yellow soil powder, plumbous zinc ore ground-slag mixture be 1:12 with account for the Ludox of powder gross weight 3%, add a small amount of water, utilize mixer slowly to stir, make raw material fully soluble in water, slowly increase subsequently appropriate water, now improve the rotating speed of mixer, after all raw materials stir, keep the rotating speed of mixer to continue to stir 15 minutes, obtain.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101982254A CN101982254A (en) | 2011-03-02 |
| CN101982254B true CN101982254B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107414015B (en) * | 2017-08-08 | 2020-01-07 | 溧阳市北方机械有限公司 | Method for improving surface quality of iron casting |
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| 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 |
| CN1319669C (en) * | 2005-12-20 | 2007-06-06 | 金啸海 | Moulding sand used for casting and its preparation method |
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2010
- 2010-11-23 CN CN201010555560.5A patent/CN101982254B/en not_active Expired - Fee Related
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| CN101982254A (en) | 2011-03-02 |
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