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Water-based paint preventing large steel casting orange peel defect

A technology for water-based coatings and steel castings, applied in the field of foundry coatings, can solve the problem of high sintering point, and achieve the effects of low thermal conductivity and good thermal insulation performance

Active Publication Date: 2016-07-13
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem in the prior art that the sintering point is too high or too low due to unreasonable matching of coating aggregates, and provides a casting water-based coating suitable for large-scale steel parts, especially suitable for large-scale steel castings produced by chrome ore sand molding , effectively prevent orange peel defects of large steel castings and improve the surface quality of castings

Method used

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Examples

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Effect test

preparation example Construction

[0023] The application also discloses a method for preparing a water-based paint for preventing orange peel defects of large steel castings, which specifically includes the following steps:

[0024] (1) Add water to the dispersion kettle, then add inorganic suspending agent and high-temperature binder under high-speed stirring, and disperse for 10 minutes;

[0025] (2) Add asbestos fibers to the dispersion kettle and disperse for 10 minutes;

[0026] (3) Add lithium carbonate, boron oxide, calcium fluoride, silicon dioxide, silicon carbide, boron nitride, and diatomaceous earth to the dispersion kettle in sequence, and disperse for 20 minutes to obtain water for preventing orange peel defects in large steel castings. base paint.

Embodiment 1

[0028] A water-based coating for preventing orange peel defects in large steel castings, the specific mass percentages of each component are: lithium carbonate 5%, boron oxide 1%, calcium fluoride 2%, silicon dioxide 4%, silicon carbide 15%, Boron nitride 14%, diatomaceous earth 10%, asbestos fiber 8%, inorganic suspending agent 3%, high temperature binder 5%, water 33%.

[0029] A kind of preparation method of the water-based coating that prevents the orange peel defect of large-scale steel casting, specifically comprises the following steps:

[0030] (1) Add 330kg of water to the dispersion kettle, then add 30kg of inorganic suspending agent and 50kg of high-temperature binder under high-speed stirring, and disperse for 10 minutes;

[0031] (2) Add 80kg of asbestos fibers to the dispersion kettle and disperse for 10 minutes;

[0032] (3) Add 50kg of lithium carbonate, 10kg of boron oxide, 20kg of calcium fluoride, 40kg of silicon dioxide, 150kg of silicon carbide, 140kg of ...

Embodiment 2

[0034] A water-based paint for preventing orange peel defects in large steel castings, the specific mass percentages of each component are: lithium carbonate 6%, boron oxide 1%, calcium fluoride 3%, silicon dioxide 5%, silicon carbide 10%, Boron nitride 10%, diatomaceous earth 14%, asbestos fiber 10%, inorganic suspending agent 3%, high temperature binder 5%, water 33%.

[0035] A kind of preparation method of the water-based coating that prevents the orange peel defect of large-scale steel casting, specifically comprises the following steps:

[0036] (1) Add 330kg of water to the dispersion kettle, then add 30kg of inorganic suspending agent and 50kg of high-temperature binder under high-speed stirring, and disperse for 10 minutes;

[0037] (2) Add 100kg of asbestos fiber to the dispersion kettle and disperse for 10 minutes;

[0038] (3) Add 60kg of lithium carbonate, 10kg of boron oxide, 30kg of calcium fluoride, 50kg of silicon dioxide, 100kg of silicon carbide, 100kg of b...

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PUM

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Abstract

The invention relates to the field of paint for casting, in particular to water-based paint capable of preventing an orange peel defect of large steel castings.The water-based paint comprises a high-temperature-resistance component, a sintering component and a thermal insulation component and particularly comprises lithium carbonate, boron oxide, calcium fluoride, silicon dioxide, silicon carbide, boron nitride, diatomaceous earth, asbestos fibers, an inorganic suspending agent, a high-temperature binder and water.The water-based paint has the moderate sintering property at molten steel casting temperature, washing of molten steel to a paint layer at high temperature can be reduced, molten steel permeation is inhibited, the sintering co-melting phenomenon of large steel casting molding material chrome ores is eliminated, and the large steel casting orange peel defect is eradicated; in addition, thermal conductivity of the paint is low, good thermal insulation performance is achieved, and the water-based paint is very suitable for chromite sand casting.

Description

technical field [0001] The invention relates to the field of casting coatings, in particular to a casting water-based coating capable of preventing orange peel defects from occurring in large steel castings. Background technique [0002] Large-scale steel castings have many alloy elements, complex shape and structure, high casting temperature and high quality requirements. If the production process of large alloy steel castings is not properly controlled, orange peel-like defects can easily appear on the surface of the casting, especially for steel castings produced in chrome ore sand molding. It is characterized by many strip-shaped or block-shaped protrusions on the surface. Some cloths reach the entire surface, and in severe cases, they will become one piece, which is difficult to clean. It seriously affects the surface quality of castings. [0003] One of the reasons for the orange peel of large steel castings is that the coating aggregate is unreasonably matched and ...

Claims

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Application Information

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IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 陈学更韩文
Owner 共享新材料(山东)有限公司