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Preparation method of powder hot spray nano-material coating

A nanomaterial, thermal spraying technology, applied in coatings, devices for coating liquids on the surface, etc., can solve the problems of easy pollution and discoloration of coatings, complex manufacturing processes, and high manufacturing costs, and achieve good melting and fluidity. Good, large powder output

Inactive Publication Date: 2003-04-30
金科
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AI Technical Summary

Problems solved by technology

The invention has complex manufacturing process and high cost, and is limited to ceramic products for architectural decoration and surface decoration of daily necessities
Chinese patent application publication 96191409.2 discloses a nanomaterial feed for thermal spraying, which uses nanoparticle suspensions and organometallic liquids to be applied to traditional thermal spray deposition to produce high-quality nanomaterials Coating method, wherein the thermal spraying device is a plasma spray gun, and the spraying material adopts WC / C 0 、Cr 3 C 2 / Ni, Fe 3 Mo 3 C / Fe, SiC, Si 3 Na, MnO 2 And yttrium-stabilized zirconia (YSZ), the nano spraying material of this invention needs to be reprocessed, the plasma thermal spraying consumes a lot of energy, and the manufacturing cost is high. Because the spraying material contains an organic binder, the organic binder is generated during the thermal spraying Carbonization, the coating is prone to contamination and discoloration

Method used

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  • Preparation method of powder hot spray nano-material coating
  • Preparation method of powder hot spray nano-material coating
  • Preparation method of powder hot spray nano-material coating

Examples

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Embodiment Construction

[0023] EXAMPLE On the surface of steel base, oxyacetylene flame thermal spraying is used to coat agglomerated nano-α-Al 2 o 3 Thermal spraying powder, preparation of nanomaterial coatings resistant to high temperature oxidation, wear resistance, reflection, thermal barrier, corrosion and erosion of molten metal, combined figure 1 ~4 further describe the specific embodiment of the present invention:

[0024] 1. Strengthen the sandblasting on the surface of the steel base, which is not only purified, activated, and nano-sized. Use high-quality corundum or quartz sand with a particle size of 7-30 mesh, use a supersonic or subsonic sandblasting gun with a pressure of 1-1.5MPa, a flow rate of 5-6kg / min, and a flow rate of 1.2-1.8m 2 The sandblasting efficiency of / h can be used to roughen the sandblasting, decontaminate and remove rust, so as to purify, activate and nanonize the surface of the steel base. After intensive sandblasting treatment, the metallographic structure was a...

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Abstract

A hot spray process for preparing the coated layer of nano-class powder includes such steps as cleaning the surface of substrate, activating, nano-class roughening, and hot spray of nano-class powder by large-diameter spray gun. The resultant coated layer features high mechanical properties, simple process, high deposition rate of powder and high spray efficiency.

Description

technical field [0001] The invention relates to a method for preparing a nanomaterial coating, in particular to a method for preparing a nanomaterial coating by powder thermal spraying, and belongs to the field of surface technology. Background technique [0002] In the existing powder thermal spraying technology, it is generally believed that the temperature and speed of the powder thermal spraying plume are two key factors to determine the high-quality coating. Therefore, powder thermal spraying technologies such as supersonic spraying and explosive spraying have appeared successively in recent years, which have played an important role in improving the temperature, speed and coating bonding strength of powder thermal spraying. However, it brings problems of high energy consumption, high noise, low deposition rate and high manufacturing cost. [0003] The existing oxyacetylene flame powder thermal spraying ceramic coating mainly has problems...

Claims

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Application Information

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IPC IPC(8): B05D1/12
Inventor 金科
Owner 金科
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