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Coating method of high-dispersion, strong adhesion, light-transmitting fine particle pre-coating method for laser melting

A technology of fine particle and laser melting, applied in the direction of coating, metal material coating process, etc., to achieve the effect of good adhesion, uniform thickness and strong engineering applicability

Active Publication Date: 2017-12-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the many problems existing in the laser melt injection of fine powder by the preset method at present, and to invent a coating method for laser melt injection with high dispersion, strong adhesion, and light-transmitting fine particle preset layer, so as to promote Wide application of fine powder, an excellent modified material, in laser melt injection surface modification technology

Method used

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  • Coating method of high-dispersion, strong adhesion, light-transmitting fine particle pre-coating method for laser melting
  • Coating method of high-dispersion, strong adhesion, light-transmitting fine particle pre-coating method for laser melting

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Embodiment 1

[0029] A method for coating a pre-coated layer of high-dispersion, strong-adhesion and light-transmitting fine particles for laser melting, which is characterized in that it includes the following steps: (1) making the fine powder into a fine particle glue-containing slurry; In the glue-containing slurry, the fine particles account for 5-15% of the slurry mass fraction, the binder accounts for 3-10% of the slurry mass fraction, the dispersant accounts for no more than 1% of the slurry mass fraction, and the balance is ethanol or A mixed solution of ethanol and water. (2) Preheat the workpiece to be modified and apply the fine particle glue-containing slurry; after preheating the workpiece to be modified to 150-180°C, apply the fine particle glue-containing slurry on the preheated workpiece to be modified permanent workpiece surface. (3) Drying and curing the preset layer; place the workpiece to be modified coated with the fine particle-containing glue-containing slurry in a d...

Embodiment 2

[0032] First, fine yttrium oxide powder with an average particle size of 40 nanometers is prepared into a fine yttrium oxide gel-containing slurry; in the fine yttrium oxide gel-containing slurry, the fine yttrium oxide particles account for 10% of the slurry mass fraction, and the The binder (polyvinyl alcohol glue) accounts for 3% of the mass fraction of the slurry, a small amount of sodium hydroxide is used to adjust the pH value to 10, and the balance is alcohol water with a volume ratio of absolute ethanol and deionized water of 2:3 mixture. Then, after the glass slide is preheated to 160° C. in a vacuum drying oven, the fine yttrium oxide-containing paste is brushed on the surface of the preheated glass slide. Finally, the glass slide coated with the fine yttrium oxide glue-containing slurry is placed in a vacuum drying oven for drying and curing. After three times of coating and drying and curing, a pre-layer with fine yttrium oxide particles in a dispersed distributio...

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Abstract

The invention discloses a coating method of a high-dispersion strong-adhesion light-permeable fine particle preset layer for laser melt injection. The coating method is characterized by comprising the steps of preparing fine particle glue-containing slurry from fine powder, preheating a to-be-modified workpiece, coating the workpiece with the fine particle glue-containing slurry, drying and curing a preset layer, and the like. The preset layer prepared by virtue of the coating method has light translucency and can well adapt to a laser melt injection particle-reinforced surface modification technique; and meanwhile, fine particles are diffused and distributed in the preset layer in a high dispersion manner and have uniform thickness, and the preset layer has well adhesion with the surface of a to-be-modified material. The coating method is not limited by the size, shape and weight of the to-be-modified workpiece, can be applied to the coating of fine particle preset layers with complex shapes and fine structures and has very strong engineering applicability.

Description

technical field [0001] The invention relates to a method for coating a pre-layer of fine particles, in particular to a method for pre-coating a pre-layer of fine particles for laser melting injection, in particular to a high-dispersion, strong adhesion, light-transmitting micro-particles for laser melting injection. Particle pre-layer coating method. Background technique [0002] Laser melt injection technology is a particle-enhanced surface modification technology that has attracted much attention in recent years. The basic principle is: while using high-energy-density laser to heat the surface of the modified workpiece to form a molten pool, the reinforced particles are introduced into the molten pool on the surface of the modified workpiece, and after condensation, a particle-enhanced surface layer is formed on the surface of the modified workpiece, thereby realizing Improve the wear resistance, corrosion resistance and other properties of the workpiece. Laser melting d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/10
Inventor 王宏宇袁晓明周建忠刘桂玲胥保文黄舒崔万里阚鹏汪涵赵前
Owner JIANGSU UNIV
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