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Preparation technique for thermal spraying nano-microcrystalline enamel

A nano-crystal, thermal spraying technology, applied in coating, melting spraying, metal material coating process, etc., can solve the problems of easy decarburization, high energy consumption, hydrogen embrittlement of parent steel, and achieve dense coating, Good toughness and high corrosion resistance

Inactive Publication Date: 2016-04-06
李训竹
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional enamel industry adopts the technology of spraying enamel glaze on the surface of steel and then enameling the whole. The obtained enamel anti-corrosion coating is mainly amorphous glass body, which has the characteristics of hardness, rigidity and brittleness. High, the disadvantages of easy decarburization, hydrogen embrittlement and phosphorus explosion of parent steel

Method used

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Examples

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Embodiment

[0012] Embodiment: a kind of preparation technology of thermal spraying nano crystal enamel, comprises the following processing steps:

[0013] (1) The ratio of raw materials is as follows: SiO2-65%, B2O3-10%, Li2-7%, Na2O-5%, Al2O3-2%, CaO-7%, TiO2-2%, ZrO2-2%, of which TiO2 , ZrO2 is the crystal nucleating agent, the raw materials are mixed evenly and sent to the high temperature furnace to fully melt at 1400 ℃, water quenching to obtain a homogeneous enamel frit.

[0014] (2) The enamel frit is ball-milled in a ball mill to obtain 120-200 mesh enamel pre-ground powder.

[0015] (3) Add 5% nano silicon dioxide to the enamel pre-grinding powder, mix uniformly and granulate in a granulator to obtain 60-80 mesh granules suitable for thermal spraying.

[0016] (4) Use a flame spray gun to evenly spray the prepared nano-microcrystalline enamel powder on the surface of the workpiece. The powder is fully melted and liquefied during the process of spraying from the spray gun. After...

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PUM

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Abstract

The invention relates to a preparation technique for thermal spraying nano-microcrystalline enamel. The process comprises the steps that 1, an enamel glaze block is prepared, specifically, a raw material prepared according to a formula and mixed uniformly is fed into a high-temperature furnace to be melted sufficiently at the temperature of 1300-1500 DEG C and is subjected to water quenching to obtain the homogeneous enamel melted glaze block; 2, thermal spraying powder is prepared, specifically, the melted glaze block is smashed and ground, enamel pre-grinding powder is obtained, 5-30% of nano-silica is added into the pre-grinding powder, mixing granulation is carried out, and the nano-microcrystalline enamel powder for thermal spraying is obtained; and 3, thermal spraying and overall crystallization are conducted, specifically, the enamel powder is uniformly sprayed on the surface of a workpiece through a thermal spraying gun, and the powder is melted and liquefied in the process of being spayed out from the spraying gun and is cooled and solidified after being sprayed on the surface of the workpiece; the obtained enamel layer is a multiphase composite material with nanocrystallines, microlite and glass being interwoven together. The enamel layer has the characteristics of being good in corrosion resistance, high in density, good in toughness, high in impact resistance, capable of being formed at a time and low in manufacturing cost.

Description

technical field [0001] The technology relates to a preparation technology of thermal spraying nano-microcrystalline enamel. Background technique [0002] The traditional enamel industry adopts the technology of spraying enamel glaze on the surface of steel and then enameling the whole. The obtained enamel anti-corrosion coating is mainly amorphous glass body, which has the characteristics of hardness, rigidity and brittleness. High, parent steel is easy to decarburize, hydrogen embrittlement and phosphorus explosion. Contents of the invention [0003] The object of the present invention is to provide a preparation technology of thermal spraying nano crystal enamel in order to overcome the defects of existing enamel materials and enamel firing technology. On the one hand, it provides nano-microcrystalline enamel to improve the corrosion resistance, compactness and toughness of the enamel coating, and on the other hand, it provides a low energy consumption thermal spraying ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23D5/00C23C4/10C03C8/02
Inventor 李训竹顾恒
Owner 李训竹
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