Formula of water-based lost foam paint for low-temperature high-strength ductile iron

A high-strength, water-based technology, applied in coatings, casting molding equipment, casting molds, etc., can solve the problems of unsatisfactory strength at room temperature, unsatisfactory coating quality, and troubled casting yields, etc., to achieve excellent surface properties, The effect of preventing chemical sticking sand and good refractoriness

Active Publication Date: 2018-05-22
TIANJIN NINGKANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the lost foam casting process has developed rapidly since its inception, the coating technology has been plagued by the difficulty of improving the casting yield. The main reason is that the quality of the coating cannot meet the requirements of the lost foam casting process.
One is that the strength at ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 A formulation of low-temperature high-strength ductile iron water-based lost foam coating, including refractory aggregate, binder, suspending agent, surfactant and carrier;

[0023] The parts by weight of each raw material in the refractory aggregate are: 15 parts by weight of diatomite, 20 parts by weight of zircon powder, 10 parts by weight of forsterite powder and 8 parts by weight of flake graphite;

[0024] The parts by weight of each raw material in the binder are respectively: 1 part by weight of polyvinyl alcohol and 1 part by weight of silica sol;

[0025] The parts by weight of each raw material in the suspending agent are respectively: 2 parts by weight of lithium-based bentonite and 1.5 parts by weight of magnesium aluminum silicate;

[0026] The parts by weight of each raw material in the surfactant are respectively: 0.1 part by weight of water-based defoamer, 0.1 part by weight of wetting agent and 0.05 part by weight of penetrant;

[0027] T...

Embodiment 2

[0029] Embodiment 2 A formulation of low-temperature high-strength ductile iron water-based lost foam coating, including refractory aggregate, binder, suspending agent, surfactant and carrier;

[0030] The parts by weight of each raw material in the refractory aggregate are: 20 parts by weight of diatomite, 30 parts by weight of zircon powder, 15 parts by weight of forsterite powder and 10 parts by weight of flake graphite;

[0031] The parts by weight of each raw material in the binder are respectively: 2 parts by weight of polyvinyl alcohol and 2 parts by weight of silica sol;

[0032] The parts by weight of each raw material in the suspending agent are respectively: 3 parts by weight of lithium-based bentonite and 2.5 parts by weight of magnesium aluminum silicate;

[0033] The parts by weight of each raw material in the surfactant are respectively: 0.2 parts by weight of water-based defoamer, 0.2 parts by weight of wetting agent and 0.1 part by weight of penetrant;

[003...

Embodiment 3

[0036] Embodiment 3 A formulation of low-temperature high-strength ductile iron water-based lost foam coating, including refractory aggregate, binder, suspending agent, surfactant and carrier;

[0037] The parts by weight of each raw material in the refractory aggregate are respectively: 17 parts by weight of diatomite, 25 parts by weight of zircon powder, 13 parts by weight of forsterite powder and 9 parts by weight of flake graphite;

[0038] The parts by weight of each raw material in the binder are respectively: 1.5 parts by weight of polyvinyl alcohol and 1.6 parts by weight of silica sol;

[0039] The parts by weight of each raw material in the suspending agent are respectively: 2.5 parts by weight of lithium-based bentonite and 2 parts by weight of magnesium aluminum silicate;

[0040] The parts by weight of each raw material in the surfactant are respectively: 0.15 parts by weight of water-based defoamer, 0.15 parts by weight of wetting agent and 0.07 parts by weight o...

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PUM

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Abstract

The invention provides a formula of water-based lost foam paint for low-temperature high-strength ductile iron. The formula comprises refractory aggregate, an adhesive, a suspension agent, a surface active agent and a carrier; the refractory aggregate comprises diatomaceous earth, zircon powder, forsterite powder and flake graphite; the adhesive comprises polyving akohol and silica sol; the suspension agent comprises lithium-based bentonite and aluminum-magnesium silicate; and the surface active agent comprises a water-based defoamer, a wetting agent and a penetrating agent. The paint preparedaccording to the formula has excellent sag resistance, uniformity, thermal stability and metal oxidative corrosion resistance, and castings cast through the paint have excellent surface finish and clear outlines.

Description

technical field [0001] The invention relates to the technical field of coated sand casting coatings, in particular to a formulation of a water-based lost foam coating for low-temperature high-strength ductile iron. Background technique [0002] Lost foam casting is to combine the plastic foam model with the same size and shape as the casting and the riser system made of the same material to form a model cluster, brush the lost foam paint and dry it, and bury it in the dry sand of the special sand box Vibrating and compacting the molding, using vacuum equipment to connect a special sand box to evacuate, pouring high-temperature metal liquid under the condition of maintaining a certain negative pressure in the mold to melt and gasify the mold, and the decomposition products escape through the coating / mould interface, and the liquid state A casting method in which metal occupies the position of the model, solidifies and cools to form a casting. Lost foam casting has outstandin...

Claims

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Application Information

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IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 刘聪
Owner TIANJIN NINGKANG TECH
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