Sand adhering prevention cast steel EPC (Expendable Pattern Casting) coating and preparation method thereof

A technology of lost foam and anti-sticking sand, applied in casting molding equipment, coating, mold and other directions, can solve the problems of quality degradation of castings, difficulty in preventing the penetration of high-temperature molten steel, decrease in air permeability, etc., and achieve the effect of simplification and peeling of subsequent processing. Outstanding and labor-saving effect

Inactive Publication Date: 2012-12-26
TAICANG KEBOER PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is another situation: some coatings do not have suitable chemical composition and sufficient thickness, and it is difficult to prevent high-temperature molten steel from continuing to penetrate into the gap between the molding sand particles. The molten steel penetrates into the molding sand through the coating, resulting in sand sticking on the surface of the casting. Uniform "iron-clad sand" adheres to the surface of the

Method used

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  • Sand adhering prevention cast steel EPC (Expendable Pattern Casting) coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Anti-stick sand cast steel lost foam coating, comprising the following components: 15 parts by weight of high alumina bauxite clinker, 12 parts by weight of graphite powder, 3 parts by weight of bentonite, 0.5 part by weight of water glass, and 2.25 parts by weight of sodium carboxymethyl cellulose , 0.45 parts by weight of n-octanol, and 0.45 parts by weight of fatty alcohol polyoxyethylene ether.

[0029] The above-mentioned anti-stick sand cast steel lost foam coating is prepared by the following method:

[0030] First, add 30 parts by weight of water to 3 parts by weight of bentonite, and stir at a high speed for 5 hours to form a bentonite slurry;

[0031] At the same time, 15 parts by weight of high alumina bauxite clinker and 12 parts by weight of graphite powder were stirred evenly in the grinding equipment to obtain aggregate, and then 15 parts by weight of water was added to make the aggregate wet and stirred;

[0032] Then add 0.5 parts by weight of water gl...

Embodiment 2

[0035] Anti-stick sand cast steel lost foam coating, contains the following components:

[0036] 45 parts by weight of high alumina bauxite clinker, 36 parts by weight of graphite powder, 1 part by weight of bentonite, 1.5 part by weight of water glass, 0.75 part by weight of sodium carboxymethyl cellulose, 0.15 part by weight of n-octanol, fatty alcohol polyoxyethylene ether 0.15 parts by weight.

[0037] The above-mentioned anti-stick sand cast steel lost foam coating is prepared by the following method:

[0038] First, add 10 parts by weight of water to 1 part by weight of bentonite, and stir at a high speed for 7 hours to form a bentonite slurry;

[0039] At the same time, 45 parts by weight of high alumina bauxite clinker and 36 parts by weight of graphite powder were stirred evenly in the grinding equipment to obtain aggregate, and then 45 parts by weight of water was added to make the aggregate wet and stirred;

[0040] Then add 1.5 parts by weight of water glass, 0.7...

Embodiment 3

[0043] Anti-stick sand cast steel lost foam coating, comprising the following components: 30 parts by weight of high alumina bauxite clinker, 25 parts by weight of flake graphite powder, 2 parts by weight of bentonite, 1 part by weight of water glass, and 1.5 parts by weight of sodium carboxymethyl cellulose parts by weight, 0.3 part by weight of n-octanol, and 0.3 part by weight of fatty alcohol polyoxyethylene ether.

[0044] The above-mentioned anti-stick sand cast steel lost foam coating is prepared by the following method:

[0045] First, add 20 parts by weight of water to 2 parts by weight of bentonite, and stir at a high speed for 6 hours to form a bentonite slurry;

[0046] At the same time, 30 parts by weight of high alumina bauxite clinker and 25 parts by weight of flake graphite powder were stirred evenly in the grinding equipment to obtain aggregate, and then 30 parts by weight of water was added to make the aggregate wet and stirred;

[0047] Then add 1 weight pa...

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Abstract

The invention discloses a sand adhering prevention cast steel EPC (Expendable Pattern Casting) coating which comprises the following components: bauxite chamotte, graphite powder, bentonite, water glass, carboxymethylcellulose sodium, n-octyl alcohol and fatty alcohol-polyoxyethylene ether. The invention further discloses a preparation method of the sand adhering prevention cast steel EPC coating. Fragment analysis for the sand adhering prevention cast steel EPC coating disclosed by the invention proves that molten steel is not dipped in the coating, refractory aggregate granules in the inner layer of the coating are filled with molten glass, and thus, the molten steel is prevented from being dipped, and a cast is also prevented from being adhered with sand. After the cast is cooled, no sand is adhered on the cast, and most of coating fragments are automatically peeled off from the surface of the cast so that the peel-off effect is obvious. Even through a small amount of coating is not peeled off, the post-treatment is greatly simplified, and a large amount of labors are saved.

Description

technical field [0001] The invention relates to the field of casting, in particular to the technical field of lost foam cast steel manufacturing, and in particular to an lost foam coating for anti-stick sand cast steel and a preparation method thereof. Background technique [0002] Lost foam casting (also known as solid casting) is to bond and combine foam models similar in size and shape to castings into model clusters. After brushing and drying refractory coatings, they are buried in dry quartz sand for vibration modeling and poured under negative pressure. , the model is vaporized, the liquid metal occupies the position of the model, and a new casting method is formed after solidification and cooling. Compared with traditional casting technology, lost foam casting has the following characteristics: 1. Good casting quality and low cost; 2. Unlimited material and suitable size; 3. High dimensional accuracy, smooth surface, and reduced cleaning workload; 4. Internal Defects...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/04
Inventor 陈立国
Owner TAICANG KEBOER PRECISION CASTING
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