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Ultra high temperature resistant cast steel precoated sand

A technology of coated sand and high temperature resistance, applied in the field of coated sand, can solve the problem that strength and high temperature resistance cannot meet people's needs, and achieve the effects of low cost, improved high temperature resistance and improved heat resistance.

Active Publication Date: 2017-10-20
LIUZHOU LIUJING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the production process of cast steel coated sand, the pouring temperature of molten steel is relatively high, and the requirements for the high temperature resistance of the raw material of coated sand are also very high. and high temperature resistance still cannot meet people's needs, therefore, it is a technical problem to be solved in this field to provide a kind of cast steel coated sand with high strength and strong heat dissipation and thermal conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A super high temperature resistant cast steel coated sand, prepared from the following components by weight: 85 parts of Hainan silica sand, 10 parts of ferric oxide sand, 3 parts of phenolic resin, 0.45 part of curing agent, 0.1 part of chromite powder, lubricating 0.05 parts.

[0024] The particle size of Hainan silica sand is 75 mesh, the particle size of ferric oxide sand is 75 mesh, and the particle size of chromite powder is 320 mesh. The content of silicon dioxide in Hainan silica sand is 99%, and the content of ferric oxide in ferric oxide sand is 70%.

[0025] The super high temperature resistant cast steel coated sand of this embodiment is prepared by the following steps:

[0026] (1) Heating of Hainan silica sand and ferric oxide sand: After the two kinds of sand are prepared in proportion, they are sent to a batch heating machine with a bucket elevator and heated to 125°C;

[0027] (2) Sand mixing and coating: Send the heated raw sand into a sand mixer wit...

Embodiment 2

[0031] An ultra-high temperature resistant cast steel coated sand, prepared from the following components by weight: 85 parts of Hainan silica sand, 15 parts of ferric oxide sand, 1 part of phenolic resin, 0.1 part of curing agent, 0.3 part of chromite powder, lubricating 0.6 parts of the agent.

[0032] The particle size of Hainan silica sand is 80 mesh, the particle size of ferric oxide sand is 75 mesh, and the particle size of chromite powder is 200 mesh. The content of silicon dioxide in Hainan silica sand is 96%, and the content of ferric oxide in ferric oxide sand is 99%.

[0033] The super high temperature resistant cast steel coated sand of this embodiment is prepared by the following steps:

[0034] (1) Heating of Hainan silica sand and ferric oxide sand: After the two kinds of sand are prepared in proportion, they are sent to the batch heating machine with a bucket elevator and heated to 135°C;

[0035] (2) Sand mixing and coating: Send the heated raw sand into a s...

Embodiment 3

[0039] A super high temperature resistant cast steel coated sand, prepared from the following components by weight: 85 parts of Hainan silica sand, 12 parts of ferric oxide sand, 2 parts of phenolic resin, 0.2 part of curing agent, 0.2 part of chromite powder, lubricating 0.2 parts of the agent.

[0040] The particle size of Hainan silica sand is 70 mesh, the particle size of ferric oxide sand is 70 mesh, and the particle size of chromite powder is 275 mesh. The content of silicon dioxide in Hainan silica sand is 98%, and the content of ferric oxide in ferric oxide sand is 80%.

[0041] The super high temperature resistant cast steel coated sand of this embodiment is prepared by the following steps:

[0042] (1) Heating of Hainan silica sand and ferric oxide sand: After the two kinds of sand are prepared in proportion, they are sent to the batch heating machine with a bucket elevator and heated to 130°C;

[0043] (2) Sand mixing and coating: Send the heated raw sand into a s...

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Abstract

The invention relates to the field of precoated sand, in particular to ultra high temperature resistant cast steel precoated sand which is prepared from the following components: 85 parts of Hainan silica sand, 10-15 parts of ferrosoferric oxide sand, 1-3 parts of phenolic resin, 0.1-0.45 part of a curing agent, 0.1-0.3 part of ferrochromium mineral powder and 0.05-0.6 part of a lubricant. The particle size of Hainan silica sand is 65-80 meshes, the particle size of ferrosoferric oxide sand is 65-75 meshes, and the particle size of ferrochromium mineral powder is 200-320 meshes. Ferrosoferric oxide sand and Hainan silica sand are uniformly mixed, the surfaces of ferrosoferric oxide sand and Hainan silica sand are coated with ferrochromium mineral powder, and during the molten steel pouring process, molten steel is first in contact with ferrochromium mineral powder and rapidly forms a layer of steel film to effectively stop permeation of molten steel; and when a resin film is completely combusted, ferrosoferric oxide rapidly guides excessive heat out, that is, the double-chilling effect of ferrochromium mineral powder and ferrosoferric oxide sand is utilized to realize the purpose of obtaining ultra high temperature resistant cast steel precoated sand.

Description

technical field [0001] The invention relates to the field of coated sand, in particular to a super high temperature resistant cast steel coated sand. Background technique [0002] Cast steel coated sand is a new type of coated sand product with excellent high temperature performance and comprehensive casting performance. Cast steel coated sand has high strength, good fluidity, fast curing speed, SiO 2 It has the characteristics of high content, high temperature resistance, low gas generation, and good fluidity. It is a modeling material widely used in steel castings such as valve housings, buffer joints, steel shafts, engineering excavators, and container corner fittings. [0003] In the production process of cast steel coated sand, the pouring temperature of molten steel is relatively high, and the requirements for the high temperature resistance of the raw material of coated sand are also very high. And high temperature resistance still can't satisfy people's demand, ther...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C1/02B22C1/22
CPCB22C1/00B22C1/02B22C1/2253
Inventor 任文强吴星任文虎王古月
Owner LIUZHOU LIUJING TECH CO LTD
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