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Coating material and preparation method

A technology of coating materials and composite materials, which is applied in the field of coating materials and preparations for casting molds. It can solve the problems of poor isolation between molten iron and casting molds, affecting the overall strength of the coating, and poor coating uniformity, so as to improve the stripping property. , Improve the strength and ensure the integrity of the effect

Active Publication Date: 2021-04-06
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the coating materials for casting molds formed by the coatings currently used can basically meet these properties, the formulation of the coatings is complex and the suspension stability value is low, which will lead to poor coating uniformity, coating defects, and affect the coating. The overall strength, the isolation effect on the molten iron and the mold is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A coating material for a mold, comprising the following raw materials in weight percentage: Al 2 o 3 Modified (CTAB) 3 PW 12 o 40 Composite powder 22%, K[AlSi 3 o 8 ] powder 2%, dextrin 1.4%, aluminum nitride bentonite composite material 19%, water glass solution 28%, and the rest is ZrSiO 4 Powder.

[0027] The Al 2 o 3 Modified (CTAB) 3 PW 12 o 40 The preparation method of composite powder comprises the following steps:

[0028] S1, to Al with a concentration of 105g / L 2 (SO 4 ) 3 Add 6 times the molar amount of sodium hydroxide to the aqueous solution, stir and react for 0.5h, then wash the precipitate 2-3 times with distilled water and absolute ethanol respectively, put it in a drying oven for 0.5h, heat to 220°C and keep 4.0h, get Al 2 o 3 Powder;

[0029] S2. Add 0.5mol of CTAB to the mixed solvent of 1000mL ethanol and 1000mL of water, stir for 10min, then add 0.5mol of CTAB, stir for 10min, continue to add 0.15mol of phosphotungstic acid, stir ...

Embodiment 2

[0035] A coating material for a mold, comprising the following raw materials in weight percentage: Al 2 o 3 Modified (CTAB) 3 PW 12 o 40 Composite powder 24%, K[AlSi 3 o 8 ] powder 4%, dextrin 1.7%, aluminum nitride bentonite composite material 21%, water glass solution 30%, the rest is ZrSiO 4 Powder.

[0036] The Al 2 o 3 Modified (CTAB) 3 PW 12 o 40 The preparation method of composite powder comprises the following steps:

[0037] S1, to Al with a concentration of 108g / L 2 (SO 4 ) 3 Add 6 times the molar amount of sodium hydroxide to the aqueous solution, stir and react for 1.0h, then wash the precipitate with distilled water and absolute ethanol for 2-3 times, put it in a drying oven to dry for 1h, heat to 235°C and keep for 3.0 h, get Al 2 o 3 Powder;

[0038] S2. Add 0.6mol of CTAB to the mixed solvent of 1000mL ethanol and 1000mL of water, stir for 10min, then add 0.6mol of CTAB, stir for 10min, continue to add 0.16mol of phosphotungstic acid, stir for...

Embodiment 3

[0044] A coating material for a mold, comprising the following raw materials in weight percentage: Al 2 o 3 Modified (CTAB) 3 PW 12 o 40 Composite powder 26%, K[AlSi 3 o 8 ] powder 5%, dextrin 1.9%, aluminum nitride bentonite composite material 22%, water glass solution 32%, the rest is ZrSiO 4 Powder.

[0045] The Al 2 o 3 Modified (CTAB) 3 PW 12 o 40 The preparation method of composite powder comprises the following steps:

[0046] S1, to Al with a concentration of 110g / L 2 (SO 4 ) 3 Add 6 times the molar amount of sodium hydroxide to the aqueous solution, stir and react for 1h, then wash the precipitate with distilled water and absolute ethanol for 2-3 times, put it in a drying oven to dry for 1h, and heat it to 250°C for 2.0h , get Al 2 o 3 Powder;

[0047] S2. Add 0.7mol of CTAB to the mixed solvent of 1000mL ethanol and 1000mL of water, stir for 10min, then add 0.7mol of CTAB, stir for 10min, continue to add 0.18mol of phosphotungstic acid, stir for 3-5...

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PUM

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Abstract

The invention discloses a coating material and a preparation method. The coating material comprises the following raw materials including, by weight, 22-26 % of Al2O3 modified (CTAB) 3PW12O40 composite powder, 2-5% of K [AlSi3O8] powder, 1.4-1.9% of dextrin, 19-22% of an aluminum nitride bentonite composite material, 28-32% of a water glass solution and the balance ZrSiO4 powder. The coating material is simple in formula, good in suspension property, uniform in coating, free of coating defects after coating, capable of guaranteeing the overall strength of the coating and good in isolation effect.

Description

technical field [0001] The invention belongs to the technical field of coating materials, and relates to a coating material and a preparation method, in particular to a casting mold coating material and a preparation method. Background technique [0002] The casting mold refers to the mold used to pour molten metal to form a casting of a certain shape during casting. This involves pouring molten metal into a mold whose cavity provides the final useful shape, after which it only needs to be machined and welded according to the specific application. However, in the process of iron casting, molten iron will be in direct contact with the mold. In order to improve the surface quality of the casting, refractory coatings are usually applied to the surface of the mold to improve its surface heat resistance, chemical stability, and resistance to molten metal erosion. performance and anti-adhesive properties. [0003] Although the coating materials for casting molds formed by the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 赵浩峰黄俊杰张椿英
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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