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Paint for reducing carburization of evaporative pattern steel castings

A technology for steel castings and lost foam, which is applied in the field of iron and steel casting. It can solve problems such as technical obstacles in the preparation of coatings for lost foam castings, and achieve the effects of good suspension, high-temperature air permeability, and high-temperature strength.

Inactive Publication Date: 2013-05-01
杨玉光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the coating preparation technology of lost foam casting iron has been developed rapidly, but the preparation technology of coating for lost foam casting steel has always been an obstacle to the production of steel castings by the lost foam casting process

Method used

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  • Paint for reducing carburization of evaporative pattern steel castings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, get 50 parts of chromite powder, 30 parts of brown corundum powder, 20 parts of bauxite, 5 parts of limestone powder, 2 parts of iron oxide, 1.2 parts of cryolite, 3 parts of silica sol, 4 parts of aluminum sulfate, calcium 2.5 parts of base bentonite, 2 parts of attapulgite, 2.5 parts of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 0.125 parts of sodium carbonate, 1.5 parts of sodium carboxymethyl cellulose, 0.02 parts of OP-10 polyvinyl alkyl alcohol ether, 0.015 parts of organosilicon defoamer, 0.02 parts of sanitin, according to the conventional preparation method of paint, the above-mentioned components are mixed with 125 parts of water and stirred evenly to obtain the paint product of the present invention.

Embodiment 2

[0017] Embodiment 2, get 45 parts of chromite powder, 40 parts of brown corundum powder, 15 parts of bauxite, 4 parts of limestone powder, 1 part of iron oxide, 1.5 parts of cryolite, 2 parts of silica sol, 5 parts of aluminum sulfate, calcium base 2 parts of bentonite, 1.5 parts of attapulgite, 3 parts of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 0.1 part of sodium carbonate, 2 parts of sodium carboxymethyl cellulose, 0.01 part of OP-10 polyvinyl alkyl alcohol ether, organic 0.03 parts of silicon defoamer, 0.02 parts of sanitin, according to the conventional preparation method of paint, the above-mentioned components are mixed with 120 parts of water and stirred evenly to obtain the paint product of the present invention.

Embodiment 3

[0018] Embodiment 3, take 60 parts of chromite powder, 30 parts of brown corundum powder, 10 parts of bauxite, 6 parts of limestone powder, 2.5 parts of iron oxide, 1.3 parts of cryolite, 4 parts of silica sol, 3 parts of aluminum sulfate, calcium base 3 parts of bentonite, 2.5 parts of attapulgite, 2 parts of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 0.15 part of sodium carbonate, 1 part of sodium carboxymethyl cellulose, 0.03 part of OP-10 polyvinyl alkyl alcohol ether, organic 0.05 part of silicon defoamer, 0.04 part of sanitin, according to the conventional preparation method of paint, the above-mentioned components are mixed with 130 parts of water and stirred evenly to obtain the paint product of the present invention.

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Abstract

The invention discloses paint for evaporative pattern steel castings, which is characterized in that aggregates of the paint are ferrochromium mineral powder, brown corundum powder and bauxite; additives are limestone powder, ferric oxide powder and cryolite powder; binders are silicasol, aluminum sulfate and a VAE (vinyl acetate-ethylene) copolymer emulsion; suspension cross-linking agents are calcium bentonite, attapulgite and cellulose sodium carboxymethyl; and assistants are sodium carbonate, OP-10 polyethylene alkyl alcohol ether, an organic silicon defoamer and domiphen bromide. The paint has the characteristics that the appropriate refractory aggregates are selected to regulate the high temperature permeability of the paint and effectively eliminate carbon generated from pyrolysis of polystyrene foam; the additives are added to eliminate carbon generated from the pyrolysis of the polystyrene foam in a casting process of the steel castings and effectively inhibit a carburization defect of the evaporative pattern steel castings; and the appropriate binders and suspension cross-linking agents are added to realize the due room temperature strength and high temperature strength of a coating.

Description

technical field [0001] The invention belongs to the technical field of iron and steel casting, and in particular relates to a coating for reducing carbon increase of lost foam cast steel parts. Background technique [0002] Coating technology is one of the key technologies of lost foam casting, which is directly related to the quality of castings. In recent years, the coating preparation technology for lost foam casting iron has been developed rapidly, but the preparation technology of coating for lost foam casting steel has always been an obstacle to the production of steel castings by the lost foam casting process. There are three reasons: one is the carbon increase of steel castings. The lost foam casting pattern material is generally polystyrene foam, and its carbon mass fraction accounts for about 92%. It will precipitate a large amount of active carbon under the action of high-temperature metal liquid. High carbon, these carbons are very easy to diffuse into the molte...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 杨玉光廖希亮董利
Owner 杨玉光
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