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Chiller coating for casting

A technology for cold iron coatings and castings, applied in the directions of coatings, molds, mold components, etc., can solve the problems of insignificant effects, difficult to eliminate, and increase the production cost of castings, so as to avoid white cracks, reduce manufacturing costs, and improve The effect of casting yield

Inactive Publication Date: 2016-06-22
祝海红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the effect is not obvious, especially the white spots on the cold iron parts, which are not easy to eliminate, and can only be eliminated by heat treatment, which increases the production cost of castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: this chilled iron coating is made up of following material by weight percentage: graphite powder 88.5%, sodium bentonite 3%, iron oxide red powder 2.5%, ferrosilicon powder 2.5%, rosin 3.5%, ethanol amount; Shaped graphite powder and flaky graphite powder are used in combination, and the percentage by weight is: 30% of flaky graphite powder and 70% of amorphous graphite powder.

[0008] The configuration method of the coating: 1. Grind the rosin and pass through a 200 / 270 sieve; 2. Dissolve the rosin in ethanol, add bentonite and stir, then add scaly graphite powder, amorphous graphite powder, iron oxide red powder, silicon Iron powder, stir evenly for use. When using, brush evenly on the cold iron work surface with a row of brushes, with a thickness of about 0.1-0.3mm, and then ignite and bake.

Embodiment 2

[0009] Embodiment 2: this cold iron paint is by weight percentage by following material: graphite powder 89%, sodium bentonite 2%, iron oxide red powder 3%, ferrosilicon powder 3%, rosin 3%, ethanol amount; Amorphous graphite powder and The ratio of flake graphite powder is 25:75.

Embodiment 3

[0010] Embodiment 3: this cold iron coating is made up of following material by weight percentage: graphite powder 88%, sodium bentonite 4%, iron oxide red powder 2%, rosin 4%, ethanol amount; The ratio is 35:65.

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PUM

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Abstract

The invention discloses a chiller coating for a casting. The chiller coating is composed of graphite powder, sodium bentonite, ferric oxide powder, ferrosilicon powder, rosin and ethyl alcohol. Amorphous graphite powder and flaky graphite powder are used in combination. According to the chiller coating, white cast of a chiller part can be effectively avoided, and the quality of the casting is improved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a cold iron coating for castings. Background technique [0002] In the production of nodular cast iron, in order to change the solidification mode of castings and ensure that there are no shrinkage porosity and shrinkage cavities inside the castings, a certain amount of chilled iron is often placed to solve the quality problems of shrinkage porosity and shrinkage cavities, but there is another outstanding The quality problems of cold iron castings are white, difficult to process, and accompanied by porosity. In production, traditional cold iron paint is used, such as: 1. Rosin 25%, soot black 15%, system oil 60%; 2. Graphite powder 94%, clay 6%, water amount. But the effect is not obvious, especially the white spots on the cold iron parts, which are not easy to eliminate, and can only be eliminated by heat treatment, which increases the production cost of castings. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 祝海红
Owner 祝海红
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