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Preparation method of wear-resistant ceramic coating

A technology of wear-resistant ceramics and coatings, applied in the field of ceramic products, can solve the problems of increasing the bonding strength of cermet coatings and substrates, low utilization rate of spraying materials, and difficulty in satisfying metal coatings, etc., so that the construction time can be easily controlled and extended Moderate storage time and hardening speed

Inactive Publication Date: 2019-06-18
张金希
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when some iron and steel enterprises prepare coatings on the surface of metal substrates, they use very expensive rare metals and high-temperature alloys for spraying to form metal coatings with high production costs. There is a high temperature softening phenomenon, so it is difficult for the metal coating to meet the requirements of some special working conditions; Chinese patent application number: 201310064468.2 discloses a method for preparing a cermet coating, including the following steps: under the action of an explosive gas explosion, Use a spray gun to spray NiMo-TiC cermet powder on the surface of the substrate to form a NiMo-TiC cermet coating; use explosive spraying technology to prepare the NiMo-TiC cermet coating, and the molten NiMo-TiC cermet powder collides with the surface of the substrate When the kinetic energy is very large, it increases the bonding strength between the NiMo-TiC cermet coating and the substrate, and because the NiMo-TiC cermet powder particles hit the surface of the substrate and are quenched after being sprayed, the ultrafine particles in the coating It exists in the form of powder particles, therefore, the formed coating has a compact structure and is tightly combined with the substrate; the preparation method of the cermet coating in the above technical solution uses a thermal spraying method to melt the high-temperature coating material and atomize it into a molten state The particle flow is sprayed on the metal surface at a very high speed. It can combine different materials to form a composite coating. However, the operating environment of the spraying operation is poor, the dust pollution is serious, and the utilization rate of the spraying material is low, which improves the production. cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation method of wear-resistant ceramic coating of the present invention comprises the following steps:

[0046] The first step, the preparation of the binding agent,

[0047]a. Take clear water twice the amount of phosphoric acid in the reaction vessel, place the reaction vessel in a thermostat, gradually add phosphoric acid with a mass fraction of 85% to the reaction vessel under the constant stirring of an electric stirrer, and dilute it to The mass fraction is 60%, and the reaction vessel is heated by a thermocouple, and the heating temperature is controlled by a temperature controller to 80°C;

[0048] b. Add aluminum hydroxide powder to the reaction vessel, so that phosphoric acid and aluminum hydroxide undergo a synthesis reaction, keep the reaction temperature above 100°C, and the reaction time is 1.5h. The reaction equation is as follows:

[0049] Al(OH) 3 +3H 3 PO 4 →Al(H 2 PO 4 ) 3 +3H 2 O;

[0050] 2Al(OH) 3 +3H 3 PO 4 →Al 2 (HPO 4 ) ...

Embodiment 2

[0079] The preparation method of wear-resistant ceramic coating of the present invention comprises the following steps:

[0080] The first step, the preparation of the binding agent,

[0081] a. Take clear water 2.5 times the amount of phosphoric acid in the reaction vessel, place the reaction vessel in a thermostat, gradually add phosphoric acid with a mass fraction of 85% to the reaction vessel under the constant stirring of an electric stirrer, and dilute it to The mass fraction is 60%, and the reaction vessel is heated by a thermocouple, and the heating temperature is controlled by a temperature controller to 120°C;

[0082] b. Add aluminum hydroxide powder to the reaction vessel, so that phosphoric acid and aluminum hydroxide undergo a synthesis reaction, keep the reaction temperature above 100°C, and the reaction time is 1.5h. The reaction equation is as follows:

[0083] Al(OH) 3 +3H 3 PO 4 →Al(H 2 PO 4 ) 3 +3H 2 O;

[0084] 2Al(OH) 3 +3H 3 PO 4 →Al 2 (HPO ...

Embodiment 3

[0113] The preparation method of wear-resistant ceramic coating of the present invention comprises the following steps:

[0114] The first step, the preparation of the binding agent,

[0115] a. Take clear water 3 times the amount of phosphoric acid in the reaction vessel, place the reaction vessel in a thermostat, gradually add phosphoric acid with a mass fraction of 85% to the reaction vessel under constant stirring of an electric stirrer, and dilute it to The mass fraction is 60%, and the reaction vessel is heated by a thermocouple, and the heating temperature is controlled by a temperature controller to 150°C;

[0116] b. Add aluminum hydroxide powder to the reaction vessel to make phosphoric acid and aluminum hydroxide undergo a synthesis reaction, keep the reaction temperature above 100°C, and the reaction time is 1h. The reaction equation is as follows:

[0117] Al(OH) 3 +3H 3 PO 4 →Al(H 2 PO 4 ) 3 +3H 2 O;

[0118] 2Al(OH) 3 +3H 3 PO 4 →Al 2 (HPO 4 ) 3 +...

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Abstract

The invention discloses a preparation method of a wear-resistant ceramic coating. The preparation method of the wear-resistant ceramic coating comprises the first step of preparation of a binding agent, the second step of surface treatment of a pipe, and the third step of preparation of the ceramic coating. According to the preparation method of the wear-resistant ceramic coating, when the weightratio of aluminum to phosphorus is 1.4: 3 and the reaction temperature is 120 DEG C, the synthesized aluminum phosphate binding agent is moderate in acidity and good in performance and can be used forpreparing the ceramic coating; when the ratio of ceramic aggregate in the coating to the binding agent is 1.7:1 and the content of thick and thin particles in the ceramic aggregate is 2:5, the ceramic aggregate in the coating is tightly stacked, and the coating is compact in structure and good in wear resistance; and meanwhile, aluminate is added into the coating prepared through the method, so that the hardening rate is moderate, the preparation time is easy to control, and the hardened coating has good wear resistance.

Description

technical field [0001] The invention relates to a preparation method of a wear-resistant ceramic coating, which belongs to the technical field of ceramic products. Background technique [0002] Coating is a solid continuous film obtained by applying paint to a substrate. It is a thin layer coated on metal, fabric, plastic and other substrates for the purpose of protection, insulation and decoration. At present, some iron and steel enterprises use very expensive rare metals and high-temperature alloys for spraying when preparing coatings on the surface of metal substrates to form metal coatings with high production costs. Due to the inherent characteristics of metals, it is difficult to There is a high temperature softening phenomenon, so it is difficult for the metal coating to meet the requirements of some special working conditions; Chinese patent application number: 201310064468.2 discloses a method for preparing a cermet coating, including the following steps: under the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/00C23C24/08
Inventor 张金希
Owner 张金希