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Preparation method of casting coating

A technology for casting coatings and preparation steps, which is applied in the field of casting coatings, can solve the problems of poor suspension stability, unsatisfactory high temperature resistance, and inability to effectively prevent sand sticking, etc., and achieve high tensile strength, good thermal shock resistance, The effect of high hardness

Inactive Publication Date: 2019-06-18
谭建平
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main technical problem to be solved by the present invention is to provide a preparation method for casting coatings in view of the defects of poor suspension stability, unsatisfactory high temperature resistance and inability to effectively prevent sand sticking caused by metal penetration in the casting coatings currently on the market

Method used

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Examples

Experimental program
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preparation example Construction

[0028] Preparation of the modified mixture: collect 500g of rice husk, wash it once with distilled water, put it into an oven, dry it for 2 hours at a temperature of 60°C, put it into a grinder after drying, and grind it for 30 minutes to obtain a crushed rice husk. Put the crushed rice husk into a calciner, fill the calciner with argon, and pyrolyze it for 1 hour under the condition of argon atmosphere and temperature at 500°C to obtain a pyrolyzed product;

[0029] Put 500g of coke into a pulverizer and pulverize for 30 minutes to obtain pulverized coke. Put the above-mentioned pyrolyzed product and pulverized coke into the reactor at a mass ratio of 3:1 and mix them evenly. Vacuum the inside of the reactor and lower the temperature up to 1700°C, at which

[0030] The mixture was obtained by reacting for 2 hours under the condition of high temperature; after mixing the above mixture and glass fiber in a mass ratio of 1:3, put it into a reaction kettle with a stirrer, heat it...

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Abstract

The invention discloses a preparation method of casting coating, and belongs to the technical field of coating preparation. Firstly, rice hulls serve as raw materials, the rice hulls are smashed, ricehull smashed materials are obtained, the rice hull smashed materials react at high temperature, silicon carbide does not easily suffer from an oxidization reaction, and the burning-on defect generated due to metal penetration of the casting coating prepared with the method can be effectively avoided; glass fibers serve as raw materials, the surfaces of the glass fibers also contain silanol groups, the surface tension of the silicon carbide is reduced, the surface energy of the silicon carbide is reduced, and the suspension dispersity is improved; kaolin and quartz stones serve as raw materials, the high temperature resistance of the kaolin and the quartz stones is extremely good, and the abrasion resistance of the kaolin and the quartz stones is good; sardine bones serve as raw materials,the sardine bones contain a large amount of fluorine, fluorine is bound on the surface of modified inorganic matter through a fermentation effect, and the suspension dispersity of the casting coatingprepared with the method is further improved; and polyvinyl alcohol is strong organic adhesive, the strength of the casting coating can be improved, and broad application prospects are achieved.

Description

technical field [0001] The invention discloses a preparation method of casting paint, which belongs to the technical field of paint preparation. Background technique [0002] Foundry coatings are the basic coatings for gravity-type metal casting and are suitable for all metal molds. The casting coating particles are relatively coarse, but it has good thermal insulation performance, which can prevent the casting from lack of meat and cold shut during casting. Suitable for thin section castings and large flat castings, also suitable for feed ports, hubs, pistons, connecting rods, cylinders, etc. Sand casting coatings in foundry production are large in quantity and wide in scope. Sand casting coating composition: suspending agent, binder, functional powder, solvent (carrier) and a small amount of additives. According to solvents: water-based coatings, alcohol-based coatings; according to uses: coatings for cast steel, coatings for cast iron, coatings for non-ferrous metals, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 谭建平
Owner 谭建平
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