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A kind of coating combination for motor car head

A car head and coating technology, which is applied in coatings, metal material coating technology, anti-corrosion coatings, etc., can solve problems such as deformation, high operating costs, and large differences in erosion angles, so as to increase service life and improve anti-corrosion Scratch ability, improve the effect of frontal erosion resistance

Active Publication Date: 2017-02-08
广东空天科技研究院(南沙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the actual situation is that different parts of the front of the car, such as the tip of the front and the slope, are subject to a large difference in erosion angle, resulting in different erosion and wear mechanisms of the coating when the train is running. Taking the front of the car as an example, the tip of the front is mainly affected by frontal impact, so it is easy to Wear due to deformation and cracks, while the inclined surface is mainly caused by particle scratches
The current coating of the car head cannot meet the existing requirements. The uniformly sprayed polyurethane topcoat / intermediate paint / polyester putty / epoxy resin primer coating is severely worn during operation, and the coating needs to be replaced uniformly. Therefore, the operating cost is higher

Method used

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  • A kind of coating combination for motor car head
  • A kind of coating combination for motor car head
  • A kind of coating combination for motor car head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The erosion experiment was carried out on the existing polyurethane composite coating system, and the experimental parameters were set as follows: the particle speed was 100m / s, the feeding speed was 3.00g / min, and the particle size was about 100μm.

[0052] The experimental results show that the erosion volume wear rate of the coating is above 0.30mm3 / g no matter in small-angle erosion or frontal erosion. For specific experimental results, see figure 2 .

Embodiment 2

[0054] A 60 μm (dry film thickness) two-component epoxy resin primer was sprayed on the aluminum alloy substrate, followed by spraying a 30 μm thick two-component polyurethane primer and a 100 μm thick modified polyurethane topcoat on it to prepare the test In this way, the erosion test was carried out.

[0055] The experimental parameters are set as follows: the particle speed is 100m / s, the feeding speed is 3.00g / min, the particle size is about 100μm, and the incident angle of the particles is changed to obtain the change curve of the erosion and wear rate of the modified polyurethane coating with the incident angle, as shown in image 3 shown.

[0056] The erosion wear at 30° incidence is the largest, and the erosion wear rate is 0.25mm 3 / g, the erosion wear rate is only 0.08mm when the impact is frontal at 90° 3 / g.

Embodiment 3

[0058] A WC-Co cermet coating with an average thickness of about 100 μm was prepared on the surface of aluminum alloy substrate by thermal spraying method, and the erosion experiment was carried out.

[0059] The experimental parameters are set as follows: the particle speed is 100m / s, the feeding speed is 3.00g / min, the particle size is about 100μm, and the incident angle of the particles is changed to obtain the change curve of the erosion wear rate of the WC-Co cermet coating with the incident angle ,Such as Figure 4 shown.

[0060] The erosion wear rate of the frontal impact of 90° incidence is the largest, which is 0.4mm 3 / g, but the 30° incident erosion wear rate is only 0.083mm 3 / g.

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Abstract

The invention relates to an erosion-resistant coating combination for bullet train locomotives. The coating combination comprises a modified polyurethane resin composite coating sprayed at the tip of a locomotive, and a hard ceramic coating sprayed on the inclined plane of the locomotive. The spraying of the high toughness coating on the tip of the locomotive effectively improves the front side erosion resistance; the spraying of the high hardness coating on the inclined plane effectively improves the scratch resistance; the locomotive coating combination can guarantee that the life of the tip of the locomotive is basically same to the life of the coating of in the position of the inclined plane, and is suitable for unified replacement; and the service life of the locomotive coating is above 3 times higher than the service life of present coatings.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to an anti-erosion coating combination used for the head of a motor vehicle. Background technique [0002] With the general speed increase of modern trains, the speed of EMUs is as high as 300km / h, and the operating environment is complex (blowing sand, floating dust, etc.), erosion and wear have become the main damage and damage mode of the front coating. [0003] Due to factors such as erosion resistance and aesthetics of the existing car front, a unified spraying method is used to prepare a composite coating of polyurethane topcoat / intermediate paint / polyester putty / epoxy resin primer on the front of the car. [0004] But the actual situation is that different parts of the front of the car, such as the tip of the front and the slope, are subject to a large difference in erosion angle, resulting in different erosion and wear mechanisms of the coating when the train is running. Ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D163/00C09D5/08C23C4/06C23C4/129C22C29/08
CPCC08K3/22C08K5/12C08K2003/2241C09D5/08C09D7/61C09D7/63C09D163/00C09D175/04C23C4/06
Inventor 李光夏原刘仁张世欣王小成武传田
Owner 广东空天科技研究院(南沙)
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