Refractory aggregate, stainless steel casting paint consisting of same and preparation method thereof

A refractory aggregate and casting coating technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of easy erosion, poor anti-sticking effect of corundum powder coating, inclusions, etc., to increase high temperature strength and normal temperature strength, good chemical stability, and the effect of reducing the occurrence rate

Active Publication Date: 2014-12-17
SHIYAN LONGGANG CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of coating can play a good role in improving the surface quality of castings for general stainless steel castings, but there are many limitations
For coatings using zircon powder as refractory aggregate, the anti-sand sticking effect is better, but the cost is high, while the anti-sand sticking effect of corundum powder coatings is not good, especially on larger complex structural parts.
In addition, the existing coatings have poor strength under high temperature conditions and are easily eroded, causing local sticky sand or inclusions, etc.

Method used

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  • Refractory aggregate, stainless steel casting paint consisting of same and preparation method thereof
  • Refractory aggregate, stainless steel casting paint consisting of same and preparation method thereof
  • Refractory aggregate, stainless steel casting paint consisting of same and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] The refractory aggregate of this embodiment is composed of magnesia powder, corundum powder and zircon powder, and its composition is: magnesia powder 45%, corundum powder 20%, zircon powder 35%, wherein magnesia powder and The particle size of the corundum powder is 220 mesh, and the particle size of the zircon powder is 325 mesh.

[0022] The stainless steel casting coating composed of the above-mentioned refractory aggregates is composed of 60% ethanol, 3% lithium bentonite, 2% silica sol, 2.5% polyvinyl butyral, 0.5% phenolic resin, and the balance is Refractory aggregate.

[0023] The preparation method of described stainless steel foundry paint, carry out according to the following steps:

[0024] Dosing according to the proportion of ingredients, firstly, expand the lithium-based bentonite, fully disperse the lithium-based bentonite in ethanol, then add refractory aggregate and stir for 10 minutes, then add silica sol, polyvinyl butyral and phenolic resin in tur...

Embodiment 2

[0027] The refractory aggregate of this embodiment is composed of magnesia powder, corundum powder and zircon powder, and its composition is: magnesia powder 55%, corundum powder 15%, zircon powder 30%, wherein magnesia powder and The particle size of the corundum powder is 220 mesh, and the particle size of the zircon powder is 325 mesh.

[0028] The stainless steel casting coating composed of the above-mentioned refractory aggregates is composed of 65% ethanol, 2.5% lithium-based bentonite, 2.5% silica sol, 1.5% polyvinyl butyral, and 0.8% phenolic resin in terms of mass percentage, and the balance is Refractory aggregate.

[0029] The preparation method of described stainless steel foundry paint, carry out according to the following steps:

[0030] Dosing according to the proportion of ingredients, first, expand the lithium-based bentonite, fully disperse the lithium-based bentonite in ethanol, then add refractory aggregate and stir for 15 minutes, then add silica sol, pol...

Embodiment 3

[0033] The refractory aggregate of this embodiment is composed of magnesia powder, corundum powder and zircon powder, and its composition is according to mass percentage: magnesia powder 50%, corundum powder 18%, zircon powder 32%, wherein magnesia powder and The particle size of the corundum powder is 220 mesh, and the particle size of the zircon powder is 325 mesh.

[0034] The stainless steel casting coating composed of the above-mentioned refractory aggregates is composed of 70% ethanol, 2% lithium bentonite, 3% silica sol, 2% polyvinyl butyral, 1.0% phenolic resin, and the balance is Refractory aggregate.

[0035] The preparation method of described stainless steel foundry paint, carry out according to the following steps:

[0036] Dosing according to the proportion of ingredients, first, expand the lithium-based bentonite, fully disperse the lithium-based bentonite in ethanol, then add refractory aggregate and stir for 25 minutes, then add silica sol, polyvinyl butyral ...

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Abstract

The invention belongs to the technical field of casting materials, in particular relates to a refractory aggregate, a stainless steel casting paint consisting of the same and a preparation method thereof. The refractory aggregate consists of magnesia powder, emery powder and zircon powder, wherein the mass percentages of the components are as follows: 45-55% of magnesia powder, 15-20% of emery powder and 30-35% of zircon powder; the stainless steel casting paint consisting of the refractory aggregate comprises the following components in percentage by mass: 60-70% of ethanol, 2-3% of lithium-based bentonite, 2-3% of silica sol, 1.5-2.5% of polyvinyl butyral, 0.5-1.0% of phenolic resin, and the balance of the refractory aggregate; the preparation method of the paint comprises the following steps: firstly, the lithium-based bentonite is expanded, and is dispersed in the ethanol; then, the refractory aggregate is added to mix for 10-25 minutes; and then, the silica sol, the polyvinyl butyral and the phenolic resin are added in sequence, and the mixture is transferred into a high-speed rotating mixer for mixing to obtain the stainless steel casting paint. The aggregate and the paint can effectively improve the high-temperature strength and normal-temperature strength of castings, and largely reduce the occurrence rate of scabs and metal penetration in the production process.

Description

technical field [0001] The invention belongs to the technical field of casting materials, and in particular relates to a refractory aggregate, a stainless steel casting paint composed of the refractory aggregate and a preparation method thereof. Background technique [0002] In recent years, the application of stainless steel castings has become more and more extensive, and the size of castings has also continued to increase in size and structure. However, how to ensure the surface quality and dimensional accuracy of sand casting stainless steel castings has always attracted much attention. Especially with the expansion of the application of stainless steel in nuclear industry, shipbuilding industry and military industry, how to ensure the quality of sand casting stainless steel with large size and complex structure is an urgent problem to be solved. The use of mold coating is an effective way to ensure the surface quality, dimensional accuracy and roughness of sand casting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 袁晓光赵双左晓娇黄宏军牟乃建
Owner SHIYAN LONGGANG CASTING
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