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Preparation method for casting coating with high temperature crack resistance

A technology of anti-crack performance and casting coating, which is applied to casting molding equipment, coatings, casting molds, etc. It can solve problems such as sand sticking, lower casting quality, and poor high-temperature crack resistance, so as to reduce sand inclusions in castings and improve surface quality. Effect of strength and toughness improvement

Inactive Publication Date: 2020-11-06
MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified alcohol-based casting coating of the present invention uses modified attapulgite as a suspending agent, and when it is suspended in ethanol, it will not form "dead sediment" when it is placed for a long time; adding a defoamer can eliminate the bubbles generated during the stirring process, To improve the wettability of alcohol-based coatings, the suspension, thixotropy and brushing effect of alcohol-based coatings can be greatly improved. The coating is smooth and compact, with high bonding strength and ", however, its high temperature crack resistance is poor Sand sticking is very easy to occur during the casting process, which reduces the quality of castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] A method for preparing a casting coating with high temperature crack resistance, comprising:

[0040] (1) Activation treatment:

[0041] Add the fly ash to the resistance furnace, heat it to 450-480°C, keep it warm for 70-90 minutes, then cool it down to room temperature naturally, and then use ammonium chloride solution to rinse repeatedly for 30 minutes, and then use Rinse with clean water to remove chloride ions, and then dry in a drying oven to constant weight to obtain activated fly ash;

[0042] (2) Fibrous bentonite:

[0043] Weigh the sodium bentonite, then add the sodium bentonite to the mixer, then add the first part of water, stir at high speed for 10 minutes, then add the second part of water, continue stirring for 25 minutes, then add the third part of water, continue stirring for 30 minutes , and then dried in a drying oven to obtain fibrous bentonite;

[0044] Bentonite:

[0045] Blue absorption 116mmol / 100g;

[0046] Montmorillonite content 77.3%; ...

Embodiment 1

[0074] A method for preparing a casting coating with high temperature crack resistance, comprising:

[0075] (1) Activation treatment:

[0076] Add the fly ash to the resistance furnace, heat it to 450°C, keep it warm for 70 minutes, then cool it down to room temperature naturally, and then rinse it repeatedly with ammonium chloride solution for 30 minutes, and then rinse it with clean water to remove chloride ions, and then dried in a drying oven to constant weight to obtain activated fly ash; the heating rate is 5°C / s. The mass fraction of the ammonium chloride solution is 6%; the drying temperature in the drying oven is 105°C;

[0077] (2) Fibrous bentonite:

[0078] Weigh the sodium bentonite, then add the sodium bentonite to the mixer, then add the first part of water, stir at high speed for 10 minutes, then add the second part of water, continue stirring for 25 minutes, then add the third part of water, continue stirring for 30 minutes , and then dried in a drying ove...

Embodiment 2

[0082] A method for preparing a casting coating with high temperature crack resistance, comprising:

[0083] (1) Activation treatment:

[0084] Add the fly ash into the electric resistance furnace, heat it to 480°C, keep it warm for 90 minutes, then cool it down to room temperature naturally, then use ammonium chloride solution to rinse it repeatedly for 30 minutes, and then rinse it with clean water to remove chloride ions, and then dried in a drying oven to constant weight to obtain activated fly ash; the heating rate is 5°C / s. The mass fraction of the ammonium chloride solution is 6%; the drying temperature in the drying oven is 105°C;

[0085] (2) Fibrous bentonite:

[0086] Weigh the sodium bentonite, then add the sodium bentonite to the mixer, then add the first part of water, stir at high speed for 10 minutes, then add the second part of water, continue stirring for 25 minutes, then add the third part of water, continue stirring for 30 minutes , and then dried in a d...

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Abstract

The invention discloses a preparation method for casting coating with high temperature crack resistance, and relates to the technical field of casting. The preparation method comprises the step (1)ofactivating treatment, the step (2) of fibrosis bentonite and the step (3) of raw material mixing; and the casting coating prepared with the method has excellent high temperature crack resistance. According to the preparation method, through activating treatment of fly ash, the dispersibility of the fly ash and the compatible associativity with other macromolecular chains are improved; meanwhile, through fibrosis treatment to the bentonite, the high temperature crack resistance of a coating formed by the casing coating can be improved greatly; and the influence of external forces can be avoided, and meanwhile the toughness of the coating can be improved greatly.

Description

technical field [0001] The invention belongs to the technical field of casting, in particular to a method for preparing a casting coating with high temperature crack resistance. Background technique [0002] Casting is the process of pouring, injecting or sucking molten metal into the mold cavity, and obtaining a casting with a certain shape and performance after it solidifies. It is the most primitive and modern process and has a wide range of uses. Coating is a material that is coated on the surface of the object to be protected or decorated, and can form a continuous film firmly attached to the object to be coated, so as to play protection, decoration, marking and other special functions (such as electrical insulation, antifouling, etc.) , drag reduction, heat insulation, radiation resistance, electrical conductivity, magnetic conductivity, etc.). Therefore, it has been more and more widely used in industry and agriculture, national defense, scientific research and peopl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 李孙德
Owner MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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